WO2018019133A1 - Household energy storage system for multi-voltage output - Google Patents

Household energy storage system for multi-voltage output Download PDF

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Publication number
WO2018019133A1
WO2018019133A1 PCT/CN2017/092845 CN2017092845W WO2018019133A1 WO 2018019133 A1 WO2018019133 A1 WO 2018019133A1 CN 2017092845 W CN2017092845 W CN 2017092845W WO 2018019133 A1 WO2018019133 A1 WO 2018019133A1
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energy storage
battery modules
household energy
voltage output
electronic switch
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PCT/CN2017/092845
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French (fr)
Chinese (zh)
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张建兴
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蔚来汽车有限公司
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Priority to CN201610609152.0 priority Critical
Priority to CN201610609152.0A priority patent/CN106130190A/en
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Publication of WO2018019133A1 publication Critical patent/WO2018019133A1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

The present invention belongs to the field of power supply devices. Specifically provided is a household energy storage system for a multi-voltage output. The household energy storage system for a multi-voltage output of the present invention is aimed at solving the problem that an existing household energy storage system cannot achieve a flexible multi-voltage output. For the purpose aimed at, the household energy storage system comprises a controller, a plurality of electronic switches, a CAN bus, a plurality of battery modules and an inverter. The electronic switches electrically connect the battery modules to the inverter via a direct-current bus. The controller is respectively electrically connected to the battery modules via the CAN bus. The controller controls the on and off of the electronic switches, so as to achieve the serial connection or parallel connection of the battery modules. With the features, in the household energy storage system for a multi-voltage output of the present invention, the household energy storage system outputs a high voltage by means of the serial connection of battery modules, the household energy storage system outputs a low voltage by means of the parallel connection of the battery modules, and the number of effective battery modules can be flexibly determined according to a target voltage.

Description

多电压输出的户用储能系统Multi-voltage output household energy storage system 技术领域Technical field
本发明属于供电设备领域,具体提供一种多电压输出的户用储能系统。The invention belongs to the field of power supply equipment, and particularly provides a household energy storage system with multi-voltage output.
背景技术Background technique
通过使用户用储能系统,用户可以在白天利用分布式发电存储电量,夜晚通过户用储能系统输出使用,降低了对传统电网的依赖,实现了绿色能源的高效利用。基于通信行业的延续及60V安全电压的考虑,传统户用储能系统电压平台使用48V系统;随着市场对于户用储能系统容量及效率提升的需求,可通过采用200V以上的高压平台将系统效率提升10%以上,这种高压平台正逐渐成为户用储能系统新的选择。By enabling users to use the energy storage system, users can use distributed power generation to store power during the day and output and use the household energy storage system at night, which reduces the dependence on the traditional power grid and realizes the efficient use of green energy. Based on the continuation of the communication industry and the consideration of 60V safety voltage, the traditional household energy storage system voltage platform uses 48V system; with the market demand for the capacity and efficiency of the household energy storage system, the system can be adopted by using a high voltage platform of 200V or higher. With an efficiency increase of more than 10%, this high-pressure platform is gradually becoming a new choice for household energy storage systems.
但是在48V系统及200V以上高压系统需求并存的时代,如何实现同一个储能系统既可应用于48V低压系统,也可应用于200V以上高压系统,或者其他不同电压的系统,成为户用储能产品所需解决的一个关键问题。However, in the era of 48V systems and high-voltage systems with more than 200V, how to realize the same energy storage system can be applied to 48V low-voltage systems, high-voltage systems above 200V, or other systems with different voltages, and become household energy storage. A key issue that the product needs to address.
相应地,本领域需要一种新的户用储能系统来解决上述问题。Accordingly, there is a need in the art for a new household energy storage system to address the above issues.
发明内容Summary of the invention
为了解决现有技术中的上述问题,即为了解决现有户用储能系统不能实现多电压灵活输出的问题,本发明提供了一种多电压输出的户用储能系统,该户用储能系统包括控制器、多个电子开关、CAN总线、多个电池模块和逆变器,所述电子开关经由直流母线将所述电池模块电连接到所述逆变器,所述控制器通过所述CAN总线分别与所述电池模块电连接,所述控制器控制所述电子开关的通断,以便实现所述电池模块的串联或者并联。In order to solve the above problems in the prior art, that is, in order to solve the problem that the existing household energy storage system cannot realize multi-voltage flexible output, the present invention provides a multi-voltage output household energy storage system, the household energy storage system. The system includes a controller, a plurality of electronic switches, a CAN bus, a plurality of battery modules, and an inverter, the electronic switch electrically connecting the battery module to the inverter via a DC bus, the controller The CAN bus is electrically connected to the battery module, respectively, and the controller controls on and off of the electronic switch to implement series or parallel connection of the battery modules.
在本发明的优选技术方案中,每个所述电子开关都包括第一电子开关和第二电子开关,所述电池模块通过所述第一电子开关依 次电连接,用以实现所述电池模块的串联输出;所述电池模块分别通过所述第二电子开关与所述直流母线电连接,用以实现所述电池模块的并联输出。In a preferred technical solution of the present invention, each of the electronic switches includes a first electronic switch and a second electronic switch, and the battery module passes the first electronic switch The sub-electrical connection is used to realize the serial output of the battery module; the battery module is electrically connected to the DC bus through the second electronic switch, respectively, for implementing parallel output of the battery module.
在本发明的优选技术方案中,所述控制器以互锁方式控制所述第一电子开关和所述第二电子开关,使得所述第一电子开关和所述第二电子开关不能同时闭合。In a preferred technical solution of the present invention, the controller controls the first electronic switch and the second electronic switch in an interlocking manner such that the first electronic switch and the second electronic switch cannot be simultaneously closed.
在本发明的优选技术方案中,所述多个电池模块中的第一个和最后一个的第二电子开关是单刀单掷开关,其他电池模块的第二电子开关是双刀双掷开关,并且所述多个电池模块的第一电子开关都是单刀单掷开关或者所述多个电池模块的第一电子开关都是单刀双掷开关。In a preferred technical solution of the present invention, the first and last second electronic switches of the plurality of battery modules are single-pole single-throw switches, and the second electronic switches of the other battery modules are double-pole double-throw switches, and The first electronic switches of the plurality of battery modules are single-pole single-throw switches or the first electronic switches of the plurality of battery modules are single-pole double-throw switches.
在本发明的优选技术方案中,每个所述电池模块的内部都设置有直流熔断器,所述直流熔断器用于使特定电池模块独立地退出所述户用储能系统,而不影响其他电池模块的操作。In a preferred technical solution of the present invention, a DC fuse is disposed inside each of the battery modules, and the DC fuse is used to independently exit a specific battery module from the household energy storage system without affecting other batteries. Module operation.
在本发明的优选技术方案中,每个所述电池模块的内部都设置有BMS,每个所述电池模块通过所述BMS与所述CAN总线连接。In a preferred technical solution of the present invention, a BMS is disposed inside each of the battery modules, and each of the battery modules is connected to the CAN bus through the BMS.
在本发明的优选技术方案中,所述电池模块通过分布式发电设备进行充电。In a preferred embodiment of the invention, the battery module is charged by a distributed power generating device.
在本发明的优选技术方案中,所述逆变器是DC/AC逆变器,所述DC/AC逆变器与所述直流母线电连接,用于将直流电转变成交流电输出。In a preferred technical solution of the present invention, the inverter is a DC/AC inverter, and the DC/AC inverter is electrically connected to the DC bus for converting direct current into an alternating current output.
在本发明的优选技术方案中,所述户用储能系统还包括显示装置,用于显示每个所述电池模块的工作状态并且/或者显示每个所述电池模块的输出电压和输出电流。In a preferred embodiment of the present invention, the household energy storage system further includes display means for displaying an operating state of each of the battery modules and/or displaying an output voltage and an output current of each of the battery modules.
本领域技术人员容易理解的是,根据本发明的技术方案,通过控制器控制与电池模块电连接的电子开关的通断,能够实现多个电池模块的串联或并联,从而能够根据需求得到多个不同的输出电压。It will be readily understood by those skilled in the art that, according to the technical solution of the present invention, by controlling the on/off of the electronic switch electrically connected to the battery module by the controller, serial or parallel connection of the plurality of battery modules can be realized, thereby being able to obtain multiple according to requirements. Different output voltages.
附图说明DRAWINGS
图1是本发明的户用储能系统的第一实施方式中所有电池模块串联时的系统拓扑框图。 1 is a system topology block diagram of all battery modules in a first embodiment of the household energy storage system of the present invention in series.
图2是本发明的户用储能系统的第一实施方式中所有电池模块并联时的系统拓扑框图。2 is a system topology block diagram of all battery modules in parallel in the first embodiment of the household energy storage system of the present invention.
图3是本发明的户用储能系统的第二实施方式的系统拓扑框图。3 is a system topology block diagram of a second embodiment of the household energy storage system of the present invention.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是,这些实施方式仅仅用于解释本发明的技术原理,并非旨在限制本发明的保护范围。本领域技术人员可以根据需要对其作出调整,以便适应具体的应用场合。Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can adjust it as needed to suit a particular application.
在本发明的描述中,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。In the description of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance.
在图1和图2所示的第一实施方式中,本发明的户用储能系统包括控制器、多个电子开关、CAN总线、DC/AC逆变器和多个电池模块。电池模块为标准电池模块,标准电压为48V。电子开关包括第一电子开关Kt和第二电子开关Km,第一电子开关Kt设置在电池模块与电池模块之间,用于将相邻的电池模块电连接,第二电子开关Km设置在电池模块和直流母线之间,将电池模块连接到直流母线上。需要说明的是,在图1和图2所示的第一实施方式中,第一个电池模块的第二电子开关Km1和最后一个电池模块的第二电子开关Kmn是单刀单掷开关,其他电池模块的第二开关Km均是双刀双掷开关,第一电子开关Kt都是单刀单掷开关。各电池模块通过CAN总线与控制器连接。DC/AC逆变器与直流输出母线电连接,用于将直流电转变成交流电输出。In the first embodiment shown in FIGS. 1 and 2, the household energy storage system of the present invention includes a controller, a plurality of electronic switches, a CAN bus, a DC/AC inverter, and a plurality of battery modules. The battery module is a standard battery module with a standard voltage of 48V. The electronic switch includes a first electronic switch Kt and a second electronic switch Km disposed between the battery module and the battery module for electrically connecting adjacent battery modules, and the second electronic switch Km is disposed at the battery module Connect the battery module to the DC bus between the DC bus and the DC bus. It should be noted that, in the first embodiment shown in FIG. 1 and FIG. 2, the second electronic switch Km1 of the first battery module and the second electronic switch Kmn of the last battery module are single-pole single-throw switches, and other batteries The second switch Km of the module is a double pole double throw switch, and the first electronic switch Kt is a single pole single throw switch. Each battery module is connected to the controller via a CAN bus. The DC/AC inverter is electrically connected to the DC output bus to convert the DC power into an AC output.
如图1所示,第一电子开关Kt全部闭合,第二电子开关Km全部断开,所有电池模块依次串联,户用储能系统高压输出,输出电压是所有电池模块输出电压之和。若是输出电压为200V以上,户用储能系统至少需要5块电池模块组成。As shown in FIG. 1, the first electronic switch Kt is completely closed, the second electronic switch Km is completely disconnected, all the battery modules are connected in series, the household energy storage system is high-voltage output, and the output voltage is the sum of the output voltages of all the battery modules. If the output voltage is more than 200V, the household energy storage system needs at least 5 battery modules.
如图2所示,第一电子开关Kt全部断开,第二电子开关Km全部闭合,所有电池模块分别与直流母线电连接并且彼此并联,户用储能系统低压输出,输出电压与标准电池模块的电压相同。 As shown in FIG. 2, the first electronic switch Kt is completely disconnected, the second electronic switch Km is completely closed, and all the battery modules are electrically connected to the DC bus and connected in parallel with each other, and the household energy storage system has low voltage output, output voltage and standard battery module. The voltage is the same.
需要说明的是,第一电子开关Kt和第二电子开关Km的闭合与断开都是通过控制器进行控制。为了避免电池模块短路,控制器中还设置有互锁程序,用以保证第一电子开关Kt和第二电子开关Km不能同时闭合。进一步,还可以选用热继电器作为第一电子开关Kt。It should be noted that the closing and opening of the first electronic switch Kt and the second electronic switch Km are controlled by the controller. In order to avoid short circuit of the battery module, an interlocking program is also provided in the controller to ensure that the first electronic switch Kt and the second electronic switch Km cannot be simultaneously closed. Further, a thermal relay can also be selected as the first electronic switch Kt.
每个电池模块内都设置有BMS,BMS通过CAN总线与控制器连接。每个电池模块内还设置有可拆卸更换的直流熔断器,当电池模块出现过载的情况时,直流熔断器会迅速被切断,电池模块断开与外部的连接。每个直流熔断器都用于使对应的电池模块独立地退出整个户用储能系统,而不影响其他电池模块的操作。直流熔断器与热继电器一同对电池模块起到双重保护的作用。A BMS is provided in each battery module, and the BMS is connected to the controller through the CAN bus. Each battery module is also provided with a detachable DC fuse. When the battery module is overloaded, the DC fuse is quickly cut off, and the battery module is disconnected from the outside. Each DC fuse is used to cause the corresponding battery module to exit the entire household energy storage system independently without affecting the operation of other battery modules. The DC fuse together with the thermal relay double protects the battery module.
户用储能系统还设置了显示装置(图中未示出),该显示装置与控制器连接,用于实时观察电池模块的工作状态和输出电压、电流和电池的使用情况等信息。The household energy storage system is further provided with a display device (not shown), which is connected to the controller for real-time observation of the operating state of the battery module and the output voltage, current and battery usage.
接下来参阅图3,在图3所示的第二实施方式中,第一电子开关Kt1为单刀双掷开关,同样由控制器控制其断开与闭合。第一电子开关Kt1的不动端与电池模块1#电连接,第一电子开关Kt1的两个动端分别与电池模块2#的两个输出端电连接;第一电子开关Kt(n-1)的不动端与电池模块(n-1)#电连接,第一电子开关Kt(n-1)的两个动端分别与电池模块n#的两个输出端电连接。第二电子开关Km1和第二电子开关Kmn是单刀单掷开关,其他第二开关Km均是双刀双掷开关。Next, refer to FIG. 3, in the second embodiment shown in FIG. 3, a first electronic switch Kt 1 SPDT switch, which is controlled similarly closed off by a controller. The fixed end of the first electronic switch Kt 1 is electrically connected to the battery module 1#, and the two movable ends of the first electronic switch Kt 1 are respectively electrically connected to the two output ends of the battery module 2#; the first electronic switch Kt (n The fixed end of -1) is electrically connected to the battery module (n-1) #, and the two movable ends of the first electronic switch Kt (n-1) are electrically connected to the two output ends of the battery module n#, respectively. The second electronic switch Km1 and the second electronic switch Kmn are single-pole single-throw switches, and the other second switches Km are double-pole double-throw switches.
继续参阅图3,电池模块全部串联时,将所有第一电子开关Kt的刀头与左侧动端的连接;电池模块部分串联时,将控制该部分电池模块的第一电子开关Kt的刀头与左侧动端的连接,其余的第一电子开关Kt的刀头与右侧动端的连接。此种实施方式可实现2至n倍于单个标准电池模块的电压输出。较之只能1倍或n倍于单个标准电池模块的电压输出的第一实施方式,具有更多的电压输出选择。Continuing to refer to FIG. 3, when all the battery modules are connected in series, the heads of all the first electronic switches Kt are connected to the left side of the moving end; when the battery modules are connected in series, the heads of the first electronic switch Kt of the part of the battery modules are controlled. The connection of the left side moving end, the connection of the remaining first electronic switch Kt and the right side moving end. Such an implementation can achieve 2 to n times the voltage output of a single standard battery module. There are more voltage output options than the first embodiment that can only double or n times the voltage output of a single standard battery module.
继续参阅图3,当电池模块全部并联时,所有的第一电子开关Kt断开,第二电子开关Km全部闭合,所有电池模块分别与直流母线电连接,户用储能系统低压输出,输出压力与标准电池模块的电压相同。 Continuing to refer to FIG. 3, when all the battery modules are connected in parallel, all the first electronic switches Kt are disconnected, the second electronic switches Km are all closed, all the battery modules are respectively electrically connected to the DC bus, and the household energy storage system is low-voltage output and output pressure. Same voltage as standard battery module.
至此,已经结合附图所示的优选实施方式描述了本发明的技术方案,但是,本领域技术人员容易理解的是,本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下,本领域技术人员可以对相关技术特征作出等同的更改或替换,这些更改或替换之后的技术方案都将落入本发明的保护范围之内。 Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims (10)

  1. 一种多电压输出的户用储能系统,其特征在于,所述户用储能系统包括控制器、多个电子开关、CAN总线、多个电池模块和逆变器,A multi-voltage output household energy storage system, characterized in that the household energy storage system comprises a controller, a plurality of electronic switches, a CAN bus, a plurality of battery modules and an inverter,
    所述电子开关经由直流母线将所述电池模块电连接到所述逆变器,The electronic switch electrically connects the battery module to the inverter via a DC bus,
    所述控制器通过所述CAN总线分别与所述电池模块电连接,The controller is electrically connected to the battery module through the CAN bus, respectively.
    所述控制器控制所述电子开关的通断,以便实现所述电池模块的串联或者并联。The controller controls the switching of the electronic switches to achieve series or parallel connection of the battery modules.
  2. 根据权利要求1所述的多电压输出的户用储能系统,其特征在于,每个所述电子开关都包括第一电子开关和第二电子开关,The multi-voltage output household energy storage system according to claim 1, wherein each of said electronic switches comprises a first electronic switch and a second electronic switch.
    所述电池模块通过所述第一电子开关依次电连接,用以实现所述电池模块的串联输出;The battery module is electrically connected in sequence through the first electronic switch to implement serial output of the battery module;
    所述电池模块分别通过所述第二电子开关与所述直流母线电连接,用以实现所述电池模块的并联输出。The battery modules are electrically connected to the DC bus through the second electronic switch to implement parallel output of the battery module.
  3. 根据权利要求2所述的多电压输出的户用储能系统,其特征在于,所述控制器以互锁方式控制所述第一电子开关和所述第二电子开关,使得所述第一电子开关和所述第二电子开关不能同时闭合。The multi-voltage output household energy storage system according to claim 2, wherein said controller controls said first electronic switch and said second electronic switch in an interlocking manner such that said first electronic The switch and the second electronic switch cannot be closed at the same time.
  4. 根据权利要求3所述的多电压输出的户用储能系统,其特征在于,所述多个电池模块中的第一个和最后一个的第二电子开关是单刀单掷开关,其他电池模块的第二电子开关是双刀双掷开关,并且所述多个电池模块的第一电子开关都是单刀单掷开关。The multi-voltage output household energy storage system according to claim 3, wherein the first and the last of the plurality of battery modules are single-pole single-throw switches, and the other battery modules The second electronic switch is a double pole double throw switch, and the first electronic switches of the plurality of battery modules are single pole single throw switches.
  5. 根据权利要求3所述的多电压输出的户用储能系统,其特征在于,所述多个电池模块中的第一个和最后一个的第二电子开关是单刀单掷开关,其他电池模块的第二电子开关是双刀双掷开关,并且所述多个电池模块的第一电子开关都是单刀双掷开关。The multi-voltage output household energy storage system according to claim 3, wherein the first and the last of the plurality of battery modules are single-pole single-throw switches, and the other battery modules The second electronic switch is a double pole double throw switch, and the first electronic switches of the plurality of battery modules are single pole double throw switches.
  6. 根据权利要求1至5中任一项所述的多电压输出的户用储能系 统,其特征在于,每个所述电池模块的内部都设置有直流熔断器,所述直流熔断器用于使特定电池模块独立地退出所述户用储能系统,而不影响其他电池模块的操作。Multi-voltage output household energy storage system according to any one of claims 1 to 5 The inside of each of the battery modules is provided with a DC fuse for independently exiting the specific battery module from the household energy storage system without affecting the operation of other battery modules. .
  7. 根据权利要求6所述的多电压输出的户用储能系统,其特征在于,每个所述电池模块的内部都设置有BMS,每个所述电池模块通过所述BMS与所述CAN总线连接。The multi-voltage output household energy storage system according to claim 6, wherein each of the battery modules is provided with a BMS, and each of the battery modules is connected to the CAN bus through the BMS. .
  8. 根据权利要求7所述的多电压输出的户用储能系统,其特征在于,所述电池模块通过分布式发电设备进行充电。A multi-voltage output household energy storage system according to claim 7, wherein said battery module is charged by a distributed power generating device.
  9. 根据权利要求8所述的多电压输出的户用储能系统,其特征在于,所述逆变器是DC/AC逆变器,所述DC/AC逆变器与所述直流母线电连接,用于将直流电转变成交流电输出。The multi-voltage output household energy storage system according to claim 8, wherein the inverter is a DC/AC inverter, and the DC/AC inverter is electrically connected to the DC bus. Used to convert direct current into alternating current output.
  10. 根据权利要求1至9中任一项所述的多电压输出的户用储能系统,其特征在于,所述户用储能系统还包括显示装置,用于显示每个所述电池模块的工作状态并且/或者显示每个所述电池模块的输出电压和输出电流。 The multi-voltage output household energy storage system according to any one of claims 1 to 9, wherein the household energy storage system further comprises display means for displaying the operation of each of the battery modules. State and/or display the output voltage and output current of each of the battery modules.
PCT/CN2017/092845 2016-07-28 2017-07-13 Household energy storage system for multi-voltage output WO2018019133A1 (en)

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