CN113328453A - 一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法 - Google Patents
一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法 Download PDFInfo
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Abstract
本发明涉及一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法,所述唤醒电路用于管理低压用户储能***的电池管理***单元部分,所述唤醒电路包括:CAN信号输入模块、光耦导通模块、MOS管控制模块、MCU连接模通过唤醒电路实现电池管理***进入深度休眠后的唤醒,根据电网、负荷、储能和电价进行运行策略调整,实现***运行优化和用户收益最大化。本发明做到了电池管理***的真正休眠和唤醒,且成本相比较家庭产品容易接受些。
Description
技术领域
本发明涉及低压户储能***的唤醒电路技术领域,尤其涉及一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法。
背景技术
目前储能已经在家庭及微网离网***中应用特别多,对***的功耗要求比较严格,特别是在离网***中,对储能电池管理***的一般需要有休眠功能,休眠功能基本可以实现,但很难实现***的深度休眠,即当用户一段时间不使用或没通信的时候,只能处于低功耗状态,这样虽然降低了电池管理***的功耗,但是有限的,这种低功耗状态板子的MCU及其它***电路供电均还存在,功耗依然存在,对***过放和耗电还是存在的,时间长了会导致***不能使用。
目前常规外部电路无法实现唤醒功能,只有昂贵的集成芯片才具备,对于对成本要求比较高的家用产品是无法接受的。
发明内容
鉴于背景技术存在的不足,本发明涉及一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法,根据上述问题,做到了电池管理***的真正休眠和唤醒,且成本相比较家庭产品容易接受些。
本发明涉及一种低压户储能***的光耦开关休眠唤醒电路及唤醒方法,所述唤醒电路用于管理低压用户储能***的电池管理***单元部分,所述唤醒电路包括:CAN信号输入模块:检测外部CANH/CANL信号并将信号输入状态反馈至下一模块;光耦导通模块:包括光耦开关,当接收到CAN信号输入模块反馈的信号时,光耦开关导通并为第一电容充电,解决两端电位不一致问题,同时在前端加第一电阻确保输出高低电平安全;MOS管控制模块:包括第一MOS管、第二MOS管,通过计算第二电阻、第四电阻和第一电容至匹配确定合理的脉冲数量将第一电容充满,充满后的第一电容为第二MOS管供电;MCU连接模块:包括DC/DC供电模块、MCU,所述DC/DC供电模块通过VCC供电,并为MCU供电;通过唤醒电路实现电池管理***进入深度休眠后的唤醒,根据电网、负荷、储能和电价进行运行策略调整,实现***运行优化和用户收益最大化。
通过采用上述方案,本发明中所用到的低压用户储能***采用集成化微电网设计思想,可以离网、并网双模式运行,并可实现运行模式无缝切换,极大提高供电可靠性,配置灵活高效。本发明的唤醒电路用来管理***中电池的电池管理***单元部分,实时监测电池组单体电压、温度的状态、光伏充电电流、负负载用电电流、电池组当前电量等关键数据,特别是在无电网的光伏***应用中,阴天或者下雨天光伏板无法发电,而此时负载用电较多电池***处于电压或者馈电状态,需要***进入低功耗状态即休眠状态,传统休眠是浅休眠,MCU一直处于时刻检测状态,这时功耗都是mA级别,为了确保电池***不会因为电池管理***功耗导致严重馈电,对休眠功耗的要求是微安级别,也就是要进入深度休眠状态,本光耦开关激活休眠电路,实现电池管理***进入深度休眠后的唤醒。
进一步的,所述第一电容为蓄电电容,所述MOS管控制模块中还设置有第二电容,所述第二电容为滤波电容,所述第一电阻为限流电阻,所述第二电阻、第四电阻为***电阻,用于控制电路唤醒的响应时间。
进一步的,当MCU通过DC/DC供电模块供电时,MCU启动,同时MCU休眠控制引脚被拉低,MCU解除休眠状态,MCU正常启动完毕。
进一步的,当所述MCU需要休眠时,MCU休眠控制引脚被释放。
进一步的,所述管理低压用户储能***包括储能***、家庭负载、电池、电表、云监控、电网,所述储能***包括太阳能板。
进一步的,所述管理低压用户储能***可应用于住宅、公共设施场所、小型工厂。
一种低压户储能***的光耦开关休眠唤醒方法,其唤醒方法如下:S1:所述CAN信号输入模块检测检测外部信号,当有CAN信号输入时,将光耦导通模块中的光耦开关导通;S2:所述光耦开关导通后,VCC给第一电容充电,第一电容冲到75%电量以上时第一MOS管导通;S3:所述第一MOS管导通后,第二MOS管的源极电平被拉低,此时所述第二MOS管导通,VCC为DC/DC供电模块供电,所述DC/DC供电模块为MCU供电;S4:所述MCU供电后开始启动,此时MCU休眠引脚被拉低,MCU解除休眠,MCU启动完毕;S5:当所述MCU休眠控制引脚释放时,所述MCU进入休眠状态。
进一步的,当管理低压用户储能***处于深度休眠状态时,光耦开关及其右端的电路均处于断电状态,唤醒方式是通过CAN的通信信息,当有数据报文时,CANH/CANL会有一个脉冲式高电平,无通信时,处于低电平。
进一步的,当所述CAN信号输入模块有数据通信时,由脉冲式高电平通过光耦开关解决两端电位不一致问题,同时在前端加限流的第一电阻确保输出高低电平在安全范围内,这时给第一MOS管前端的第一电容充电,因为一个脉冲信号时间过短无法使第一MOS管导通,通过***计算及***的第二电阻、第四电阻和第一电容值匹配确定脉冲数量将电容电充满。
进一步的,当所述第一电容满电后为第一MOS管导通提供足够的电量,第一MOS管导通后将第二MOS管导通,第二MOS管导通后,给***MCU的供电部分的DC/DC供电模块启动,此时***被唤醒,唤醒后MCU供电由另外的MCU供电电路支持供电。
通过采用上述方案:实现了真正意义上的休眠,降低电池管理***功耗,通过光耦开关及电阻、电容设计,实现深度休眠的唤醒,降低***成本和减少产品体积,解决原有休眠及唤醒采用国外专用芯片的问题。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明实施例的唤醒电路结构示意图。
图2是本发明实施例的用户储能***及唤醒电路模块连接结构示意图。
图3是本发明实施例的用户储能***结构示意图。
附图标记,1、CAN信号输入模块;11、第一电阻;2、光耦导通模块;21、光耦开关;3、MOS管控制模块;31、第一电容;32、第一MOS管;33、第二MOS管;34、第二电阻;35、第三电阻;36、第四电阻;37、第二电容;4、MCU连接模块;41、MCU;42、DC/DC供电模块;5、储能***;6、家庭负载;7、电池;8、电表;9、云监控;10、电网;12、配电开关;13、储能变流器;14、组合器。
具体实施方式
以下将结合本发明的附图,对本发明实施例中的技术方案进行清楚、完整的描述和讨论,显然,这里所描述的仅仅是本发明的一部分实例,并不是全部的实例,基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本发明的保护范围。
为了便于对本发明实施例的理解,下面将结合附图以具体实施例为例作进一步的解释说明,且各个实施例不构成对本发明实施例的限定。
本实施例1:随着碳达峰和碳中和的提出,绿色能源使用越来越多,特别是光伏***,主要用在光储一体化的低压户用储能***中,***结构参照图2、图3所示,户用储能***采用一体化家电设计,精致美观,便于安装,配备长寿命锂离子电池,提供光伏阵列接入,可以为住宅、公共设施场所、小型工厂所等提供电力。采用集成化微电网设计思想,可以离网、并网双模式运行,并可实现运行模式无缝切换,极大提高供电可靠性;配置灵活高效的管理***,可以根据电网、负荷、储能和电价进行运行策略调整,实现***运行优化和用户收益最大化。所述***结构包括储能***5、家庭负载6、电池7、电池8、云监控9、电网10、配电开关12、储能变流器13、组合器;
本发明是用来管理***中电池的电池管理***单元部分,实时监测电池组单体电压、温度的状态、光伏充电电流、负负载用电电流、电池组当前电量等关键数据,特别是在无电网的光伏***应用中,阴天或者下雨天光伏板无法发电,而此时负载用电较多电池***处于电压或者馈电状态,需要***进入低功耗状态即休眠状态,传统休眠是浅休眠,MCU41一直处于时刻检测状态,这时功耗都是mA级别,为了确保电池***不会因为电池管理***功耗导致严重馈电,对休眠功耗的要求是微安级别,也就是要进入深度休眠状态,本光耦开关21激活休眠电路,实现电池管理***进入深度休眠后的唤醒,目前常规外部电路无法实现此唤醒功能,只有昂贵的集成芯片才具备,对于对成本要求比较高的家用产品是无法接受的。
电池储能部分是***当中最主要的部分,解决清洁能源供电的可靠性和稳定性,同时也是作为备用电源使用,当清洁能源或者电网供电突然出现故障无法供电情况下,可以做为应急能源进行电能的输出,确保关键用电设备的正常供电和使用;电池储能单元主要由单体电芯、电池管理***(BMS)、控制单元以及相关结构件构成。
本发明是基于光耦开关的唤醒电路,其具体工作原理及组成如下:所述唤醒电路参照图1所示:包括CAN信号输入模块1、光耦导通模块2、MOS管控制模块3、MCU连接模块4 ,所述CAN信号输入模块1包括CAN通信的CANH/CANL、起到限流作用的第一电阻11,所述光耦导通模块2包括光耦开关21,所述MOS管控制模块3包括储蓄用的第一电容31、滤波用的第二电容37、第一MOS管32、第二MOS管33、控制电路的唤醒的响应时间的第二电阻34和第四电阻36、分压作用的第三电阻35。所述MCU连接模块4包括DC/DC供电模块42和MCU41。具体工作原理,当管理***处于深度休眠状态时,光耦开关21及其右端的电路均处于断电状态,唤醒方式是通过CAN的通信信息,当有数据报文时,CANH/CANL会有一个脉冲式高电平,无通信时,处于低电平,当有数据通信时,有脉冲式高电平通过光耦开关解决两端电位不一致问题,同时在前端加限流第一电阻11确保输出高低电平在安全范围内,这时给第一MOS管32前端第一电容31充电,因为一个脉冲信号时间过短无法是第一MOS管32导通,通过***计算及***第二电阻34和第四电阻36和第一电容31值匹配确定合理的脉冲数量将电容电充满,电容满电后为第一MOS管32导通提供足够电量,第一MOS管32导通后将第二MOS管33导通,第二MOS管33导通后,给***MCU41的供电部分的DC/DC供电模块42就启动了,***被唤醒,唤醒后MCU41供电就由另外设计的MCU41供电电路支持供电。
所述唤醒电路的唤醒方法如下:
S1:所述CAN信号输入模块检测检测外部信号,当有CAN信号输入时,将光耦导通模块2中的光耦开关21导通;
S2:所述光耦开关21导通后,VCC给第一电容31充电,第一电容31冲到75%电量以上时第一MOS管32导通;
S3:所述第一MOS管32导通后,第二MOS管33的源极电平被拉低,此时所述第二MOS管33导通,VCC为DC/DC42供电模块供电,所述DC/DC42供电模块为MCU41供电;
S4:所述MCU41供电后开始启动,此时MCU41休眠引脚被拉低,MCU41解除休眠,MCU41启动完毕;
S5:当所述MCU41休眠控制引脚释放时,所述MCU41进入休眠状态。
在本发明的描述中,需要说明的是,术语“第一”、“第二”、“第三”、“第四”仅用于描述目的,而不能理解为指示或暗示相对重要性。
最后应说明的是:以上所述实施例,仅为本发明的具体实施方式,用以说明本发明技术方案,而非对其限制,本发明的保护范围并不局限于此,尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解: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,其依然可以对前述实施例所记载的技术方案进行修改或可轻易想到变化,或者对其中部分技术特征进行等同替换;而这些修改、变化或者替换,并不使相应技术方案的本质脱离本发明实施例技术方案的精神和范围,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所述以权利要求的保护范围为准。
Claims (10)
1.一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:所述唤醒电路用于管理低压用户储能***的电池管理***单元部分,所述唤醒电路包括:
CAN信号输入模块:检测外部CANH/CANL信号并将信号输入状态反馈至下一模块;
光耦导通模块:包括光耦开关,当接收到CAN信号输入模块反馈的信号时,光耦开关导通并为第一电容充电,解决两端电位不一致问题,同时在前端加第一电阻确保输出高低电平安全;
MOS管控制模块:包括第一MOS管、第二MOS管,通过计算第二电阻、第四电阻和第一电容至匹配确定合理的脉冲数量将第一电容充满,充满后的第一电容为第二MOS管供电;
MCU连接模块:包括DC/DC供电模块、MCU,所述DC/DC供电模块通过VCC供电,并为MCU供电;
通过唤醒电路实现电池管理***进入深度休眠后的唤醒,根据电网、负荷、储能和电价进行运行策略调整,实现***运行优化和用户收益最大化。
2.根据权利要求1所述的一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:所述第一电容为蓄电电容,所述MOS管控制模块中还设置有第二电容,所述第二电容为滤波电容,所述第一电阻为限流电阻,所述第二电阻、第四电阻为***电阻,用于控制电路唤醒的响应时间。
3.根据权利要求1所述的一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:当MCU通过DC/DC供电模块供电时,MCU启动,同时MCU休眠控制引脚被拉低,MCU解除休眠状态,MCU正常启动完毕。
4.根据权利要求4所述的一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:当所述MCU需要休眠时,MCU休眠控制引脚被释放。
5.根据权利要求1所述的一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:所述管理低压用户储能***包括储能***、家庭负载、电池、电表、云监控、电网,所述储能***包括太阳能板。
6.根据权利要求5所述的一种低压户储能***的光耦开关休眠唤醒电路,其特征在于:所述管理低压用户储能***可应用于住宅、公共设施场所、小型工厂。
7.一种低压户储能***的光耦开关休眠唤醒方法,其特征在于:采用上述1-6任意一种低压户储能***的光耦开关休眠唤醒电路,其唤醒方法如下:
S1:所述CAN信号输入模块检测检测外部信号,当有CAN信号输入时,将光耦导通模块中的光耦开关导通;
S2:所述光耦开关导通后,VCC给第一电容充电,第一电容冲到75%电量以上时第一MOS管导通;
S3:所述第一MOS管导通后,第二MOS管的源极电平被拉低,此时所述第二MOS管导通,VCC为DC/DC供电模块供电,所述DC/DC供电模块为MCU供电;
S4:所述MCU供电后开始启动,此时MCU休眠引脚被拉低,MCU解除休眠,MCU启动完毕;
S5:当所述MCU休眠控制引脚释放时,所述MCU进入休眠状态。
8.根据权利要求7所述的一种低压户储能***的光耦开关休眠唤醒方法,其特征在于:当管理低压用户储能***处于深度休眠状态时,光耦开关及其右端的电路均处于断电状态,唤醒方式是通过CAN的通信信息,当有数据报文时,CANH/CANL会有一个脉冲式高电平,无通信时,处于低电平。
9.根据权利要求8所述的一种低压户储能***的光耦开关休眠唤醒方法,其特征在于:当所述CAN信号输入模块有数据通信时,由脉冲式高电平通过光耦开关解决两端电位不一致问题,同时在前端加限流的第一电阻确保输出高低电平在安全范围内,这时给第一MOS管前端的第一电容充电,因为一个脉冲信号时间过短无法使第一MOS管导通,通过***计算及***的第二电阻、第四电阻和第一电容值匹配确定脉冲数量将电容电充满。
10.根据权利要求8所述的一种低压户储能***的光耦开关休眠唤醒方法,其特征在于:当所述第一电容满电后为第一MOS管导通提供足够的电量,第一MOS管导通后将第二MOS管导通,第二MOS管导通后,给***MCU的供电部分的DC/DC供电模块启动,此时***被唤醒,唤醒后MCU供电由另外的MCU供电电路支持供电。
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