CN102082307B - Method and system for parallel use of lithium battery modules - Google Patents
Method and system for parallel use of lithium battery modules Download PDFInfo
- Publication number
- CN102082307B CN102082307B CN2010106201010A CN201010620101A CN102082307B CN 102082307 B CN102082307 B CN 102082307B CN 2010106201010 A CN2010106201010 A CN 2010106201010A CN 201010620101 A CN201010620101 A CN 201010620101A CN 102082307 B CN102082307 B CN 102082307B
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- busbar
- battery module
- voltage value
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
本发明实施例提供了一种锂电模块并联使用方法及系统。所述方法包括：收集初始上电时各锂电模块的电压值；根据收集的信息，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排，对接入母排后的所述各锂电模块同时充放电。由于本发明可以使各锂电模块的电压差保持在一定范围内再接入并联，以降低组间压差，避免电池组间大电流冲击，从而能够减少对BMS电路损坏，提高锂电模块并联使用的安全性。
Embodiments of the present invention provide a method and system for using lithium battery modules in parallel. The method includes: collecting the voltage value of each lithium battery module when it is initially powered on; according to the collected information, controlling the voltage difference between each lithium battery module and the busbar according to the voltage equalization method, and sequentially adjusting the voltage value between the lithium battery module and the busbar The lithium battery module with the smallest difference is connected to the busbar, and the lithium battery modules connected to the busbar are charged and discharged at the same time. Because the present invention can keep the voltage difference of each lithium battery module within a certain range and then connect them in parallel to reduce the voltage difference between groups and avoid high current impact between battery groups, thereby reducing damage to the BMS circuit and improving the parallel use of lithium battery modules. safety.
Description
技术领域 technical field
本发明涉及一种锂电模块并联使用方法及系统。The invention relates to a method and system for using lithium battery modules in parallel.
背景技术 Background technique
锂电池能量密度高、单体电芯电压高、寿命长、无记忆效应，无污染，因此采用锂电池供电是电池应用的发展趋势。在大功率应用中，首先需要单体电芯串联组成电池组来提高供电电压，然后电池组再并联来提高供电的输出功率。单体电芯和串联后的电池组都需要电池管理系统(Battery Management System，BMS)监控管理。锂电池组和BMS共同组成锂电模块。Lithium batteries have high energy density, high cell voltage, long life, no memory effect, and no pollution. Therefore, the use of lithium batteries for power supply is the development trend of battery applications. In high-power applications, it is first necessary to connect single cells in series to form a battery pack to increase the supply voltage, and then connect the battery packs in parallel to increase the output power of the power supply. Both single cells and battery packs connected in series need to be monitored and managed by a battery management system (Battery Management System, BMS). The lithium battery pack and BMS together form a lithium battery module.
锂电模块并联使用存在的主要问题是组间大电流冲击。由于各电池组电压不同，直接并联，在汇聚点会有一个电压平衡的过程。在这个过程中，由于电池组内阻很小，不同电池组之间就会因为压差而产生很大的电流，从而会导致BMS电路损坏。The main problem of parallel use of lithium battery modules is the large current impact between groups. Since the voltages of each battery pack are different, they are directly connected in parallel, and there will be a voltage balancing process at the convergence point. In this process, due to the small internal resistance of the battery pack, a large current will be generated due to the voltage difference between different battery packs, which will cause damage to the BMS circuit.
发明内容 Contents of the invention
本发明实施例提供了一种锂电模块并联使用方法及系统，能够减少对BMS电路的损坏，提高锂电模块并联使用的安全性。Embodiments of the present invention provide a method and system for parallel use of lithium battery modules, which can reduce damage to BMS circuits and improve the safety of parallel use of lithium battery modules.
本发明实施例采用如下技术方案：The embodiment of the present invention adopts following technical scheme:
一种锂电池组并联使用方法，包括：A method for using lithium battery packs in parallel, comprising:
收集初始上电时各锂电模块的电压值；Collect the voltage value of each lithium battery module at initial power-on;
根据收集的信息，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排；According to the collected information, the voltage difference between each lithium battery module and the busbar is controlled according to the voltage equalization method, and the lithium battery module with the smallest voltage difference between the busbar and the busbar is connected to the busbar in turn;
对接入母排后的所述各锂电模块同时充放电。Simultaneously charge and discharge the lithium battery modules connected to the busbar.
一种锂电模块并联使用系统，包括：一个以上的锂电模块、主控单元；其中，所述主控单元，用于收集初始上电时各锂电模块的电压值，根据收集的信息，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排，然后对接入母排后的所述各锂电模块同时充放电。A system for using lithium battery modules in parallel, comprising: more than one lithium battery module and a main control unit; wherein the main control unit is used to collect the voltage value of each lithium battery module when it is initially powered on, and according to the collected information, according to the voltage equalization control the voltage difference between each lithium battery module and the busbar, and sequentially connect the lithium battery module with the smallest voltage difference between the busbar to the busbar, and then connect the lithium battery modules connected to the busbar at the same time Discharge.
由上述技术方案可知，本发明实施例通过按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排，可以使各锂电模块的电压差保持在一定范围内再接入并联，以降低电池组之间的电压差，避免电池组间大电流冲击，从而能够减少对BMS电路损坏，提高锂电模块并联使用的安全性。It can be seen from the above technical solution that the embodiment of the present invention controls the voltage difference between each lithium battery module and the busbar in accordance with the voltage equalization method, and sequentially connects the lithium battery module with the smallest voltage difference to the busbar to the busbar, The voltage difference of each lithium battery module can be kept within a certain range before being connected in parallel to reduce the voltage difference between battery packs and avoid high current impact between battery packs, thereby reducing damage to the BMS circuit and improving the parallel use of lithium battery modules. safety.
附图说明 Description of drawings
下面对本发明描述中所需要使用的附图作一简单地介绍。Below is a brief introduction to the accompanying drawings that need to be used in the description of the present invention.
图1为本发明实施例提供的控制锂电模块并联使用的方法示意图；Fig. 1 is a schematic diagram of a method for controlling parallel use of lithium battery modules provided by an embodiment of the present invention;
图2为本发明实施例提供的控制锂电模块并联使用的系统的结构框图；Fig. 2 is a structural block diagram of a system for controlling parallel use of lithium battery modules provided by an embodiment of the present invention;
图3为本发明实施例一的充电均压并联方式的示意图；Fig. 3 is a schematic diagram of the charging and voltage equalizing parallel connection method according to Embodiment 1 of the present invention;
图4为本发明实施例二的放电均压并联方式的示意图；Fig. 4 is a schematic diagram of the discharge voltage equalization parallel connection mode of the second embodiment of the present invention;
图5为本发明实施例三的充放电配合并联方式的示意图；Fig. 5 is a schematic diagram of the charge-discharge coordinated parallel connection mode according to the third embodiment of the present invention;
图6为充电限流并联方式的示意图。FIG. 6 is a schematic diagram of a charging current limiting parallel mode.
具体实施方式 Detailed ways
下面结合附图及实施例，对本发明的技术方案进行清楚、完整地描述。The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.
参见图1，本发明实施例提供的锂电模块并联使用方法，包括：Referring to Figure 1, the method for using lithium battery modules in parallel according to the embodiment of the present invention includes:
S11，收集初始上电时各锂电模块的电压值。S11, collecting the voltage value of each lithium battery module at initial power-on.
S12，根据收集的信息，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排。S12, according to the collected information, control the voltage difference between each lithium battery module and the busbar according to the voltage equalization method, and sequentially connect the lithium battery module with the smallest voltage difference to the busbar to the busbar.
S13，对接入母排后的所述各锂电模块同时充放电。S13. Simultaneously charge and discharge the lithium battery modules connected to the busbar.
参见图2，本发明实施例提供的锂电模块并联使用系统，包括：一个以上的锂电模块、主控单元；其中，主控单元用于收集初始上电时各锂电模块的电压值，根据收集的信息，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排，然后对接入后的所述各锂电模块同时充放电。Referring to Fig. 2, the lithium battery module parallel use system provided by the embodiment of the present invention includes: more than one lithium battery module and a main control unit; wherein, the main control unit is used to collect the voltage value of each lithium battery module at initial power-on, according to the collected Information, control the voltage difference between each lithium battery module and the busbar according to the voltage equalization method, and sequentially connect the lithium battery module with the smallest voltage difference to the busbar The lithium battery module is charged and discharged at the same time.
具体地，锂电模块并联使用系统主要由锂电模块、主控单元、系统电源、负载组成，其中锂电模块由电池组和BMS(电池管理系统)组成。各个组成部分的功能如下：Specifically, the lithium battery module parallel use system is mainly composed of a lithium battery module, a main control unit, a system power supply, and a load, wherein the lithium battery module is composed of a battery pack and a BMS (battery management system). The functions of each component are as follows:
锂电模块(101、102、103)，是直流电源系统中的一种后备电源装置，用于在系统停电时对外放电，保持系统正常工作。锂电模块由锂电池组和BMS组成。The lithium battery module (101, 102, 103) is a backup power supply device in the DC power supply system, and is used for external discharge when the system is powered off, so as to maintain the normal operation of the system. The lithium battery module consists of a lithium battery pack and a BMS.
电池管理系统BMS(201、202、203)，是一种管理锂电池组的装置，用于检测锂电池组和单体电芯的电压、电流，判断异常情况并做出保护动作。BMS可以通过串口/网口/CAN/无线/干节点/模块间通信等通信接口与主控单元401进行信息交互。在本发明实施例系统中，BMS可以接收主控单元的控制，执行挂接到系统电源的动作。The battery management system BMS (201, 202, 203) is a device for managing lithium battery packs. It is used to detect the voltage and current of lithium battery packs and single cells, judge abnormal conditions and take protective actions. The BMS can exchange information with the main control unit 401 through communication interfaces such as serial port/network port/CAN/wireless/stem node/inter-module communication. In the system of the embodiment of the present invention, the BMS can receive the control of the main control unit, and execute the action of connecting to the system power supply.
锂电池组(301、302、303)，是一种存储电能的装置，由单节电芯串联而成。根据应用场景的不同，大容量的电芯直接串联，小容量的电芯可以先并联然后串联。The lithium battery pack (301, 302, 303) is a device for storing electric energy, and is composed of single cells connected in series. According to different application scenarios, large-capacity cells are directly connected in series, while small-capacity cells can be connected in parallel first and then in series.
主控单元401，是进行数据运算和信号控制处理的装置，完成各BMS电压的收集、均压算法的运算、告警数据的存取以及告警信号的输出功能。主控单元可以是一个独立的部件，也可以作为软件存在于BMS中。The main control unit 401 is a device for data calculation and signal control processing, and completes the collection of BMS voltages, the calculation of voltage equalization algorithms, the access of alarm data and the output of alarm signals. The main control unit can be an independent component, or exist in the BMS as software.
系统电源501，是一种直流输出的电源装置，通信领域一般为48V直流。在发明实施例系统中，系统电源作为给锂电池组充电的设备，同时也给负载供电。系统电源可以控制是否对外放电。The system power supply 501 is a power supply device with DC output, generally 48V DC in the communication field. In the system of the embodiment of the invention, the system power supply is used as a device for charging the lithium battery pack and also supplies power to the load. The system power supply can control whether to discharge externally.
负载601，是用电设备的统称，消耗电能。本文所提到的负载，都是直流供电设备。The load 601 is a general term for electrical equipment that consumes electrical energy. The loads mentioned in this article are all DC power supply equipment.
母排701，是系统电源、锂电模块、负载的汇聚点。The busbar 701 is the convergence point of the system power supply, lithium battery module and load.
可以理解的是，图2仅列举了三组锂电模块并联的情形，本发明实施例的方法和系统理论上可以支持无限多组锂电模块并联。It can be understood that FIG. 2 only exemplifies the parallel connection of three groups of lithium battery modules, and the method and system of the embodiment of the present invention can theoretically support unlimited parallel connection of multiple groups of lithium battery modules.
本发明实施例的系统工作原理如下：初始上电时，主控单元401控制各锂电模块的BMS断开锂电模块与母排的连接，并将所管理的锂电模块的电压值通过通信接口上报给主控单元，主控单元根据上报结果，收集初始上电时各锂电模块的电压值，按照均压方式控制各锂电模块与母排之间的电压差值，并依次把与母排之间的电压差值最小的锂电模块接入母排，然后对接入母排后的所述各锂电模块同时充放电。The working principle of the system in the embodiment of the present invention is as follows: when initially powered on, the main control unit 401 controls the BMS of each lithium battery module to disconnect the lithium battery module from the busbar, and reports the voltage value of the managed lithium battery module to the Main control unit, according to the reported results, the main control unit collects the voltage value of each lithium battery module at initial power-on, controls the voltage difference between each lithium battery module and the busbar in a voltage equalizing manner, and sequentially controls the voltage difference between each lithium battery module and the busbar. The lithium battery module with the smallest voltage difference is connected to the busbar, and then the lithium battery modules connected to the busbar are charged and discharged simultaneously.
由本发明实施例的上述技术可知，通过按照均压方式控制各锂电模块与母排之间的电压差值，使得各锂电模块的电压差保持在一定范围内再接入并联，以降低电池组之间的电压差，避免电池组间大电流冲击，从而能够减少对BMS电路损坏，提高锂电模块并联使用的安全性。It can be known from the above technology of the embodiment of the present invention that by controlling the voltage difference between each lithium battery module and the busbar in a voltage equalizing manner, the voltage difference of each lithium battery module is kept within a certain range before being connected in parallel to reduce the voltage difference between the battery packs. The voltage difference between them can avoid the high current impact between the battery packs, thereby reducing the damage to the BMS circuit and improving the safety of the parallel use of lithium battery modules.
下面采用实施例，对主控单元按照均压方式控制各锂电模块与母排之间的电压差值的方式进行说明。The following uses an embodiment to describe the manner in which the main control unit controls the voltage difference between each lithium battery module and the busbar in a voltage equalizing manner.
实施例一：充电均压并联方式Embodiment 1: Charging voltage equalization in parallel
参见图3，图3为本实施例的充电均压并联方式的示意图，包括：Referring to Fig. 3, Fig. 3 is a schematic diagram of the charging and equalizing parallel mode of this embodiment, including:
S31，对未接入母排的各锂电模块的电压值由低到高进行排序；S31, sort the voltage values of the lithium battery modules not connected to the busbar from low to high;
S32，根据排序结果，将电压值最低的锂电模块接入母排进行充电；S32, according to the sorting result, connect the lithium battery module with the lowest voltage value to the busbar for charging;
S33，当母排的电压值上升到第二低的锂电模块的电压值时，将所述第二低的锂电模块接入母排进行充电；S33. When the voltage value of the busbar rises to the voltage value of the second lowest lithium battery module, connect the second lowest lithium battery module to the busbar for charging;
S34，以此类推，直至所有的锂电模块都接入母排。S34, and so on, until all lithium battery modules are connected to the busbar.
以图2所示的系统结构图为例进行说明，在初始上电时，系统电源工作，所有锂电模块的BMS都断开锂电模块与母排的连接，处于不充不放的静置状态，此时母排的初始电压值为零。各BMS检测其所管理的锂电模块的电压值上报给主控单元，由主控单元比较各锂电模块的电压值并排序，先通知电压最低的锂电模块(例如101)的BMS接入到母排上，由系统电源对锂电池组301进行充电，等母排电压上升到第二低的锂电模块(例如102)的电压值时，再通知第二组锂电模块的BMS接入到母排上，由系统电源对锂电池组302进行充电，以此类推，直到所有的锂电模块都接入到母排上。Take the system structure diagram shown in Figure 2 as an example. When the power is initially turned on, the system power supply works, and the BMS of all lithium battery modules disconnects the connection between the lithium battery module and the busbar, and is in a static state without charging or discharging. At this time, the initial voltage value of the busbar is zero. Each BMS detects the voltage value of the lithium battery module it manages and reports it to the main control unit. The main control unit compares the voltage values of each lithium battery module and sorts them, and first notifies the BMS of the lithium battery module with the lowest voltage (such as 101) to connect to the busbar First, the lithium battery pack 301 is charged by the system power supply, and when the voltage of the busbar rises to the voltage value of the second lowest lithium battery module (such as 102), the BMS of the second group of lithium battery modules is notified to connect to the busbar. The lithium battery pack 302 is charged by the system power supply, and so on until all the lithium battery modules are connected to the busbar.
实施例二：放电均压并联方式Embodiment 2: Parallel connection mode of discharge voltage equalization
参见图4，图4为本实施例的放电均压并联方式的示意图，包括：Referring to Fig. 4, Fig. 4 is a schematic diagram of the discharge voltage equalization parallel connection mode of this embodiment, including:
S41，对未接入母排的各锂电模块的电压值由高到低进行排序；S41, sort the voltage values of the lithium battery modules not connected to the busbar from high to low;
S42，根据排序结果，将电压值最高的锂电模块接入母排进行放电；S42, according to the sorting result, connect the lithium battery module with the highest voltage value to the busbar for discharging;
S43，当母排的电压值下降到第二高的锂电模块的电压值时，将所述第二高的锂电模块接入母排进行放电；S43. When the voltage value of the busbar drops to the voltage value of the second highest lithium battery module, connect the second highest lithium battery module to the busbar for discharging;
S44，以此类推，直至所有的锂电模块都接入母排。S44, and so on, until all lithium battery modules are connected to the busbar.
放电均压并联方式和充电均压并联方式的硬件结构一样，只是软件编程实现上面有些小的差别。仍以图2所示的系统结构图为例进行说明，在初始上电时，系统电源工作，所有锂电模块的BMS都断开锂电模块与母排的连接，处于不充不放的静置状态，此时母排的初始电压值为零。各BMS检测其所管理的锂电模块的电压值上报给主控单元，由主控单元比较各锂电模块的电压值并排序，先通知电压最高的锂电模块(例如101)的BMS接入到母排上，然后断开系统电源，对锂电池组301进行放电，等母排电压下降到第二高的锂电模块(例如102)的电压值时，再通知第二组锂电模块的BMS接入到母排上，断开系统电源对锂电池组302进行放电，以此类推，直到所有的锂电模块都接入到母排上。然后再开启系统电源对并联的各锂电模块进行充放电。The hardware structure of the discharge voltage equalizing parallel mode is the same as that of the charging voltage equalizing parallel mode, but there are some small differences in software programming. Still take the system structure diagram shown in Figure 2 as an example. When the power is initially turned on, the system power supply works, and the BMS of all lithium battery modules disconnects the connection between the lithium battery module and the busbar, and is in a static state without charging or discharging. , the initial voltage value of the busbar is zero at this time. Each BMS detects the voltage value of the lithium battery module it manages and reports it to the main control unit. The main control unit compares the voltage values of each lithium battery module and sorts them, and first notifies the BMS of the lithium battery module with the highest voltage (such as 101) to connect to the busbar Then disconnect the system power supply, discharge the lithium battery pack 301, and wait for the busbar voltage to drop to the voltage value of the second highest lithium battery module (such as 102), and then notify the BMS of the second group of lithium battery modules to connect to the busbar. On the row, disconnect the system power supply to discharge the lithium battery pack 302, and so on, until all the lithium battery modules are connected to the busbar. Then turn on the system power to charge and discharge the parallel lithium battery modules.
实施例三：充放电均压并联方式Embodiment 3: Charge and discharge voltage equalization parallel connection mode
参见图5，图5为本实施例的充放电均压并联方式的示意图，包括：Referring to Fig. 5, Fig. 5 is a schematic diagram of the charge and discharge voltage equalization parallel connection mode of this embodiment, including:
S51，计算出未接入母排的各锂电模块的电压值的平均电压值；S51, calculating the average voltage value of the voltage values of the lithium battery modules not connected to the busbar;
S52，将电压值低于所述平均电压值的锂电模块由低到高依次接入母排进行充电，直至母排的电压值上升到所述平均电压值；S52. Connect the lithium battery modules whose voltage values are lower than the average voltage value from low to high to the busbar for charging, until the voltage value of the busbar rises to the average voltage value;
S53，将电压值高于所述平均电压值的锂电模块由高到低依次接入母排进行放电，直至母排的电压值下降到所述平均电压值。S53. Connect the lithium battery modules whose voltage values are higher than the average voltage value from high to low to the bus bar for discharging until the voltage value of the bus bar drops to the average voltage value.
具体地，将电压值低于所述平均电压值的锂电模块，从电压值最低的锂电模块开始接入母排进行充电，当母排的电压值上升到第二低的锂电模块的电压值时，将所述第二低的锂电模块接入母排进行充电，以此类推，直至母排的电压值上升到所述平均电压值；将电压值高于所述平均电压值的锂电模块，从电压值最高的锂电模块开始接入母排进行放电，当母排的电压值下降到第二高的锂电模块的电压值时，将所述第二高的锂电模块接入母排进行放电，以此类推，直至母排的电压值下降到所述平均电压值。Specifically, the lithium battery modules whose voltage value is lower than the average voltage value are connected to the bus bar for charging from the lithium battery module with the lowest voltage value. When the voltage value of the bus bar rises to the voltage value of the second lowest lithium battery module , connect the second lowest lithium battery module to the busbar for charging, and so on, until the voltage value of the busbar rises to the average voltage value; connect the lithium battery module whose voltage value is higher than the average voltage value, from The lithium battery module with the highest voltage value starts to be connected to the busbar for discharge. When the voltage value of the busbar drops to the voltage value of the second highest lithium battery module, the second highest lithium battery module is connected to the busbar for discharge, so that By analogy, until the voltage value of the busbar drops to the average voltage value.
其中，上述步骤S52与步骤S53无特定次序要求，可以同时进行，也可以任一步骤先进行。Wherein, the above step S52 and step S53 have no specific order requirement, and can be performed at the same time, or either step can be performed first.
仍以图2所示的系统结构图为例进行说明，在初始上电时，系统电源工作，所有锂电模块的BMS都断开锂电模块与母排的连接，处于不充不放的静置状态，此时母排的初始电压值为零。各BMS检测其所管理的锂电模块的电压值上报给主控单元，由主控单元比较各锂电模块的电压值并排序，计算出平均电压值，若比较结果为：锂电池组301电压值＜锂电池组302电压值＜平均电压值＜锂电池组303电压值，则可以先将电压最低的锂电模块101接入到母排上，由系统电源501对锂电池组301进行充电，等母排电压上升到锂电池组302电压值时，再通知锂电模块102接入到母排上，由系统电源对锂电池组302进行充电，直到母排的电压值上升到所述平均电压值。然后再通知电压最高的锂电模块103接入到母排上，然后断开系统电源，对锂电池组303进行放电，等母排电压下降到所述平均电压值时，再开启系统电源对并联的各锂电模块进行充放电。Still take the system structure diagram shown in Figure 2 as an example. When the power is initially turned on, the system power supply works, and the BMS of all lithium battery modules disconnects the connection between the lithium battery module and the busbar, and is in a static state without charging or discharging. , the initial voltage value of the busbar is zero at this time. Each BMS detects the voltage value of the lithium battery module it manages and reports it to the main control unit. The main control unit compares the voltage values of each lithium battery module and sorts them to calculate the average voltage value. If the comparison result is: the voltage value of the lithium battery pack 301 < If the voltage value of the lithium battery pack 302 < the average voltage value < the voltage value of the lithium battery pack 303, the lithium battery module 101 with the lowest voltage can be connected to the busbar first, and the lithium battery pack 301 will be charged by the system power supply 501, and then the busbar will be charged. When the voltage rises to the voltage value of the lithium battery pack 302, the lithium battery module 102 is notified to be connected to the busbar, and the lithium battery pack 302 is charged by the system power supply until the voltage value of the busbar rises to the average voltage value. Then notify the lithium battery module 103 with the highest voltage to be connected to the busbar, then disconnect the system power supply, discharge the lithium battery pack 303, and when the busbar voltage drops to the average voltage value, turn on the system power supply to the parallel connected Each lithium battery module is charged and discharged.
需要说明的是，上述实施例一至实施例三，在实际逻辑控制时，当有锂电池组与母排之间的电压差值小于一定范围(该差值范围根据测试情况而定，一般设置为±0.5V)，则通知BMS挂接该锂电模块，然后判断锂电模块是否全部挂接完成。如果没有全部挂接完成，则继续等待电池充电或放电，直到所有的锂电模块都挂接到母排上。然后由主控单元控制系统电源对接入母排后的各锂电模块同时充放电。It should be noted that, in the above-mentioned embodiment 1 to embodiment 3, in the actual logic control, when the voltage difference between the lithium battery pack and the busbar is less than a certain range (the difference range depends on the test situation, generally set to ±0.5V), then notify the BMS to mount the lithium battery module, and then judge whether all the lithium battery modules have been connected. If not all connections are completed, continue to wait for the battery to be charged or discharged until all lithium battery modules are connected to the busbar. Then the main control unit controls the system power supply to simultaneously charge and discharge each lithium battery module connected to the busbar.
上述本发明实施例的主控单元可以是一个独立的部件，也可以作为软件功能模块存在于各锂电模块的电池管理系统BMS中。The main control unit of the above-mentioned embodiments of the present invention may be an independent component, or may exist as a software function module in the battery management system BMS of each lithium battery module.
进一步地，本发明上述实施例的各锂电模块，其中至少一个锂电模块的BMS中设置有充电限流电路。如图6所示，对设置有充电限流电路的BMS，每个BMS的充放电电路完全独立。由于锂电池充电曲线的限制，充电电路中有限流功能，在锂电模块并联之前，BMS设置为充电状态，因为限流的功能，从而可以进一步避免大电流冲击。需要说明的是，图6中的正极汇流点只是示意，实际系统中可能是负极汇流，或者正负极都汇流。Further, in the lithium battery modules of the above-mentioned embodiments of the present invention, the BMS of at least one lithium battery module is provided with a charging current limiting circuit. As shown in Figure 6, for a BMS equipped with a charging current limiting circuit, the charging and discharging circuits of each BMS are completely independent. Due to the limitation of the lithium battery charging curve, the current limiting function in the charging circuit, before the lithium battery modules are connected in parallel, the BMS is set to the charging state, because of the current limiting function, which can further avoid the impact of large current. It should be noted that the positive confluence point in FIG. 6 is only for illustration, and in an actual system, the negative confluence may be converging, or both positive and negative confluence may be converging.
本发明实施例提供的控制锂电模块并联使用的方法及系统能够应用到所有需要锂电模块并联的场景。The method and system for controlling parallel use of lithium battery modules provided by the embodiments of the present invention can be applied to all scenarios requiring parallel connection of lithium battery modules.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
Claims (11)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106201010A CN102082307B (en) | 2010-12-31 | 2010-12-31 | Method and system for parallel use of lithium battery modules |
| PCT/CN2011/074912 WO2011157116A1 (en) | 2010-12-31 | 2011-05-30 | Lithium battery module parallel using method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106201010A CN102082307B (en) | 2010-12-31 | 2010-12-31 | Method and system for parallel use of lithium battery modules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102082307A CN102082307A (en) | 2011-06-01 |
| CN102082307B true CN102082307B (en) | 2013-08-07 |
Family
ID=44088121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106201010A Active CN102082307B (en) | 2010-12-31 | 2010-12-31 | Method and system for parallel use of lithium battery modules |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102082307B (en) |
| WO (1) | WO2011157116A1 (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311965B (en) * | 2012-03-06 | 2016-02-24 | 北京联动天翼科技有限公司 | Batteries in parallel connection group discharge and recharge intelligent management apapratus and method |
| CN104425852A (en) * | 2013-09-06 | 2015-03-18 | 苏州宝时得电动工具有限公司 | Control method, control assembly, battery system and electric tool |
| CN104716699A (en) * | 2013-12-17 | 2015-06-17 | 苏州宝时得电动工具有限公司 | Multiple battery pack co-electro-discharge control method and multiple battery pack power system |
| CN104079040A (en) * | 2014-07-18 | 2014-10-01 | 厦门路迅电控有限公司 | Blood collecting vehicle and power supply device and power supply mode of blood collecting vehicle-mounted equipment |
| CN106877481B (en) * | 2015-12-14 | 2019-10-11 | 维谛技术有限公司 | A kind of power-supply system and method for parallel-operation expansion |
| US10449867B2 (en) * | 2015-12-15 | 2019-10-22 | Faraday & Future Inc. | Systems and methods for connecting battery strings to a DC bus |
| CN106169795B (en) * | 2016-09-13 | 2018-08-17 | 沃太能源南通有限公司 | A kind of energy-storage lithium battery group and its expansion method |
| CN106532800A (en) * | 2016-10-13 | 2017-03-22 | 惠州市蓝微新源技术有限公司 | Battery management system with parallel connection of multiple BMS modules and realization method thereof |
| CN108258748A (en) * | 2016-12-29 | 2018-07-06 | 宁德时代新能源科技股份有限公司 | Power-on control method and system for battery cabinet |
| CN106707192B (en) * | 2017-01-23 | 2023-06-16 | 深圳市哈威飞行科技有限公司 | Aircraft safety detection management device and safety control system |
| CN106712202A (en) * | 2017-01-23 | 2017-05-24 | 深圳市哈威飞行科技有限公司 | Aircraft power supply management system and aircraft |
| CN106787018A (en) * | 2017-03-14 | 2017-05-31 | 苏州极目机器人科技有限公司 | A kind of charging method of plant protection UAV Intelligent lithium battery |
| CN110870157A (en) * | 2017-04-10 | 2020-03-06 | 纯船舶公司 | Battery grouping charging system |
| WO2019063072A1 (en) | 2017-09-27 | 2019-04-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Network node power control |
| CN107706978A (en) * | 2017-10-20 | 2018-02-16 | 中科创能实业有限公司 | Battery management method and system |
| CN107947261A (en) * | 2017-11-14 | 2018-04-20 | 欣旺达电子股份有限公司 | Multi-string battery powering method, apparatus and system |
| CN109065988A (en) * | 2018-07-05 | 2018-12-21 | 北京长城华冠汽车科技股份有限公司 | Multiple gradients utilize the method and device of battery pack charge and discharge |
| CN110266066B (en) * | 2019-05-05 | 2021-10-22 | 江苏苏美达机电有限公司 | Charging control device and charging control method for parallel connection of multiple lithium battery packs |
| CN110783989A (en) * | 2019-11-08 | 2020-02-11 | 海宁昱能电子有限公司 | Control method for parallel operation of battery packs and related device |
| CN111509804A (en) * | 2020-04-27 | 2020-08-07 | 格力博(江苏)股份有限公司 | A charger, lawn mower and charging control method |
| CN111262311A (en) * | 2020-03-27 | 2020-06-09 | 常州格力博有限公司 | Charger, mower and charging control method |
| KR102659479B1 (en) * | 2020-03-27 | 2024-04-23 | 동관 파워앰프 테크놀로지 리미티드 | Parallel battery pack charging and discharging management methods, electronics and electrical systems |
| CN116391286A (en) | 2021-10-11 | 2023-07-04 | 宁德时代新能源科技股份有限公司 | Compensation method and device for cell sampling voltage and electricity utilization device |
| CN114039403A (en) * | 2021-11-18 | 2022-02-11 | 北京百度网讯科技有限公司 | Lithium battery system and data center |
| CN114301114B (en) * | 2021-12-10 | 2024-05-17 | 华为数字能源技术有限公司 | Lithium battery, lithium battery system and control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714675A (en) * | 2009-11-26 | 2010-05-26 | 林伯璋 | Battery pack balancing system and method |
| CN201584798U (en) * | 2010-01-26 | 2010-09-15 | 浙江戴尔维动力电池系统有限公司 | Electric balance structure of lithium battery module |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1261611B (en) * | 1993-10-14 | 1996-05-23 | Fiat Auto Spa | PROCEDURE FOR EQUALIZING THE VOLTAGE TO THE HEAD OF TRACTION BATTERIES CONNECTED IN SERIES, IN THE CHARGING PHASE, FOR ELECTRIC VEHICLES AND DEVICE FOR ITS IMPLEMENTATION. |
| CN100386941C (en) * | 2001-03-30 | 2008-05-07 | 运输设计有限公司 | Battery management unit, system and method |
| CN101248364B (en) * | 2005-07-07 | 2011-05-25 | 株式会社东芝 | Battery system |
| JP2009038876A (en) * | 2007-08-01 | 2009-02-19 | Toyota Motor Corp | Voltage equalization device for battery pack |
| CN101557123B (en) * | 2009-05-05 | 2011-04-13 | 成都市华为赛门铁克科技有限公司 | Electric equipment and charging and discharging method thereof |
-
2010
- 2010-12-31 CN CN2010106201010A patent/CN102082307B/en active Active
-
2011
- 2011-05-30 WO PCT/CN2011/074912 patent/WO2011157116A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714675A (en) * | 2009-11-26 | 2010-05-26 | 林伯璋 | Battery pack balancing system and method |
| CN201584798U (en) * | 2010-01-26 | 2010-09-15 | 浙江戴尔维动力电池系统有限公司 | Electric balance structure of lithium battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011157116A1 (en) | 2011-12-22 |
| CN102082307A (en) | 2011-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102082307B (en) | Method and system for parallel use of lithium battery modules | |
| WO2021190196A1 (en) | Charging and discharging management method for parallel battery packs, electronic device, and electrical system | |
| CN111431231B (en) | A battery group architecture based on flexible connection and redundancy | |
| WO2023184700A1 (en) | Battery system charging and discharging control method based on dynamic reconfigurable battery network | |
| CN103390920B (en) | A management method and system for an all-vanadium redox flow battery applied to large-scale energy storage | |
| CN109038712B (en) | Liquid metal battery pack balance control method and fault-tolerant system | |
| CN101882699A (en) | Charge and discharge balancing control method for power battery pack | |
| US11949273B2 (en) | Method for managing charging and discharging of parallel-connected battery pack, electronic device, and electrical system | |
| TWI667864B (en) | Battery balance management circuit | |
| CN102842937B (en) | Charging and discharging control system and charging and discharging optimization method for battery packs connected in series | |
| CN205484533U (en) | Battery voltage monitored control system | |
| CN108667107B (en) | Storage battery pack equalization circuit comprising auxiliary battery and control method | |
| CN103986205B (en) | 16 series lithium battery group multi-mode balance control methods of dynamic adaptation | |
| CN112600264A (en) | Control method and system of parallel battery packs, electronic equipment and vehicle | |
| CN107425572A (en) | A kind of energy intelligent management system of power battery pack | |
| CN107154666A (en) | A kind of batteries management system and electric power system | |
| CN108258748A (en) | Power-on control method and system for battery cabinet | |
| CN203398816U (en) | Power battery group equalization device | |
| WO2018157534A1 (en) | Balancing method and device for energy storage battery management system and energy storage battery management system | |
| CN205388998U (en) | Nickel -hydrogen battery management system | |
| CN114336804A (en) | A kind of energy storage system, method and device for retired battery pack | |
| CN117748668A (en) | Energy transfer system and method between battery PACKs of energy storage system | |
| CN106786816A (en) | active balance charging device | |
| CN110556848B (en) | BMS (battery management system) based on string regulation and control of storage battery and operation control method of energy storage system | |
| CN110943467B (en) | A sorting and assembly system based on the dynamic characteristics of double-string lithium batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |