本公開屬于電池(chi)包(bao)，特別涉及一(yi)種儲能系統電池(chi)包(bao)級電池(chi)充(chong)放電方(fang)法、裝置及設備。

背景技術：

1、儲能系統中，一般實現的(de)都是簇(cu)級(多個(ge)電(dian)(dian)(dian)(dian)池(chi)包并(bing)聯)管(guan)理(li)，每次對電(dian)(dian)(dian)(dian)池(chi)的(de)充放電(dian)(dian)(dian)(dian)都是基(ji)于(yu)一簇(cu)來進行的(de)，當(dang)(dang)電(dian)(dian)(dian)(dian)池(chi)簇(cu)中的(de)某一個(ge)電(dian)(dian)(dian)(dian)池(chi)包充滿電(dian)(dian)(dian)(dian)時(shi)，電(dian)(dian)(dian)(dian)池(chi)管(guan)理(li)系統會(hui)對這(zhe)簇(cu)電(dian)(dian)(dian)(dian)池(chi)停止充電(dian)(dian)(dian)(dian)，這(zhe)就(jiu)(jiu)會(hui)導致(zhi)其(qi)余電(dian)(dian)(dian)(dian)池(chi)包無(wu)法(fa)充滿電(dian)(dian)(dian)(dian)。放電(dian)(dian)(dian)(dian)同(tong)理(li)，當(dang)(dang)某一個(ge)電(dian)(dian)(dian)(dian)池(chi)包達(da)到(dao)放電(dian)(dian)(dian)(dian)截止電(dian)(dian)(dian)(dian)壓(ya)時(shi)，電(dian)(dian)(dian)(dian)池(chi)管(guan)理(li)系統就(jiu)(jiu)會(hui)對該簇(cu)電(dian)(dian)(dian)(dian)池(chi)停止放電(dian)(dian)(dian)(dian)，這(zhe)就(jiu)(jiu)導致(zhi)簇(cu)內(nei)其(qi)他電(dian)(dian)(dian)(dian)池(chi)包還有多余電(dian)(dian)(dian)(dian)量(liang)時(shi)無(wu)法(fa)放電(dian)(dian)(dian)(dian)充分。這(zhe)就(jiu)(jiu)會(hui)影響(xiang)整(zheng)個(ge)電(dian)(dian)(dian)(dian)池(chi)的(de)使用壽命(ming)。

2、儲能系(xi)統中(zhong)，還有被(bei)動均(jun)衡處理充(chong)(chong)放電不平(ping)衡。被(bei)動均(jun)衡是通過電阻將(jiang)多余的電量以熱量的方式進(jin)行(xing)釋放，這種方式導(dao)致能源浪費，且均(jun)衡時(shi)間過長會導(dao)致充(chong)(chong)放電時(shi)間進(jin)一步變長。

3、儲能系(xi)統中，還(huan)有主(zhu)動均衡來解決充放電不平衡。主(zhu)動均衡系(xi)統需要復雜的(de)電路和(he)(he)控制(zhi)器來檢(jian)監測和(he)(he)調節(jie)電池(chi)單體之間的(de)電壓差異，增加了(le)系(xi)統的(de)設計、制(zhi)造和(he)(he)維護成本(ben)。在頻繁進行均衡的(de)情況(kuang)下，能耗增加可能會對電池(chi)系(xi)統的(de)續航能力產生(sheng)影響。

技術實現思路

1、鑒于(yu)上(shang)述問題，本公(gong)開提出了(le)儲能系統中(zhong)電(dian)(dian)(dian)(dian)(dian)池(chi)包充放電(dian)(dian)(dian)(dian)(dian)方法，解(jie)決了(le)儲能系統中(zhong)，電(dian)(dian)(dian)(dian)(dian)池(chi)長期(qi)使用后(hou)，電(dian)(dian)(dian)(dian)(dian)池(chi)充放電(dian)(dian)(dian)(dian)(dian)不均衡的情況。電(dian)(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)(dian)過程中(zhong)，對電(dian)(dian)(dian)(dian)(dian)池(chi)包soc較(jiao)低的多補電(dian)(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)(dian)池(chi)放電(dian)(dian)(dian)(dian)(dian)過程中(zhong)，對電(dian)(dian)(dian)(dian)(dian)池(chi)包soc低的限制輸出功(gong)率，保(bao)持(chi)電(dian)(dian)(dian)(dian)(dian)池(chi)包間soc一致。

2、本技術實施例(li)提供一種儲能系統(tong)電池包(bao)級(ji)電池充放電方(fang)法，包(bao)括：

3、對(dui)(dui)一(yi)個(ge)或(huo)多個(ge)電(dian)池(chi)包進行(xing)soc標定(ding)生成soc標定(ding)結果，并更新為所述soc標定(ding)結果，其中，對(dui)(dui)同一(yi)電(dian)池(chi)簇中不同電(dian)池(chi)包進行(xing)soc標定(ding)；

4、獲取放(fang)電(dian)(dian)結束(shu)時(shi)刻的(de)soc值(zhi)，根據所(suo)述放(fang)電(dian)(dian)結束(shu)時(shi)刻的(de)soc值(zhi)和初始soc值(zhi)計算電(dian)(dian)池包所(suo)能存儲的(de)最大電(dian)(dian)量值(zhi)；

5、根據(ju)所述(shu)最大電(dian)量值計(ji)算(suan)總(zong)電(dian)量，并根據(ju)總(zong)電(dian)量確定其(qi)中一個電(dian)池包的當前電(dian)量；

6、根據所述(shu)當前(qian)電(dian)量對電(dian)池包(bao)進行放電(dian)或充電(dian)。

7、進一步(bu)的，所(suo)述(shu)初始soc值是(shi)根(gen)據所(suo)述(shu)soc標定(ding)結果確定(ding)的，其中，所(suo)述(shu)初始soc值記為(wei)soc0。

8、進(jin)一步的(de)，所述方法還包括：

9、接(jie)收儲能變(bian)流(liu)器(qi)下發的(de)功率值并根(gen)據所(suo)述功率值進行放(fang)電(dian)(dian)，實時(shi)記錄(lu)放(fang)電(dian)(dian)起(qi)始時(shi)刻，放(fang)電(dian)(dian)結束時(shi)刻和放(fang)電(dian)(dian)電(dian)(dian)流(liu)。

10、進一(yi)步的(de)，根(gen)據所述放電(dian)結束時刻的(de)soc值(zhi)和初始soc值(zhi)計算電(dian)池包所能存儲的(de)最大電(dian)量值(zhi)，包括：

11、根據公式：

12、

13、計算其中一個電(dian)(dian)池(chi)包(bao)充滿電(dian)(dian)時(shi)的(de)最大電(dian)(dian)量(liang)值，其中，q為其中一個電(dian)(dian)池(chi)包(bao)充滿電(dian)(dian)時(shi)的(de)電(dian)(dian)量(liang)；η為充電(dian)(dian)效率；soc0為初始soc值；soc1為放電(dian)(dian)結束時(shi)刻的(de)soc值；i為放電(dian)(dian)電(dian)(dian)流；t為充電(dian)(dian)時(shi)間。

14、進(jin)一步的，所(suo)述方法還包括(kuo)：

15、根據(ju)多個(ge)電(dian)(dian)池包(bao)充滿(man)電(dian)(dian)時的最大電(dian)(dian)量值，確定電(dian)(dian)池包(bao)的所能(neng)存(cun)儲的最大電(dian)(dian)量值。

16、進一步的(de)，所(suo)述根(gen)據所(suo)述最大(da)電(dian)量值計(ji)算總(zong)電(dian)量，并根(gen)據總(zong)電(dian)量確(que)定其中(zhong)一個電(dian)池(chi)包的(de)當前電(dian)量，包括(kuo)：

17、根據(ju)多個電(dian)池包充滿電(dian)時的最(zui)大(da)電(dian)量值疊加(jia)計算總(zong)電(dian)量；

18、通過公式：

19、

20、確定其(qi)中一個電(dian)池包(bao)的當(dang)前電(dian)量，其(qi)中，qn為(wei)電(dian)池包(bao)的所能存(cun)儲的最大電(dian)量值；soc1n為(wei)不(bu)同電(dian)池包(bao)在放(fang)電(dian)結(jie)束時(shi)刻t1的soc值；qn為(wei)放(fang)電(dian)結(jie)束時(shi)刻t1的電(dian)量值。

21、進一步的，所述根(gen)據所述當前電(dian)量(liang)對電(dian)池包進行放電(dian)或充電(dian)，包括：

22、電池包放電步驟：

23、接收(shou)儲能變流器(qi)pcs放(fang)電(dian)(dian)功率值(zhi)，根據所述放(fang)電(dian)(dian)功率值(zhi)進行(xing)放(fang)電(dian)(dian)，其中，根據公(gong)式(shi)：

24、

25、計算(suan)出每(mei)個充放(fang)電單元(yuan)的功率值pn，并下發給充放(fang)電單元(yuan)；

26、其中，qn為總(zong)電量。

27、進一(yi)步的，所述(shu)方法還包括(kuo)：

28、充放(fang)電(dian)單(dan)元根據接收到的功率值(zhi)pn進(jin)行設(she)置(zhi)電(dian)池(chi)包(bao)放(fang)電(dian)電(dian)流，其中，所(suo)述放(fang)電(dian)電(dian)流是根據公(gong)式：

29、

30、確定(ding)的(de)，其中，pn每個充放(fang)(fang)電(dian)(dian)單(dan)元的(de)功率值；un為每個充放(fang)(fang)電(dian)(dian)單(dan)元的(de)放(fang)(fang)電(dian)(dian)電(dian)(dian)壓；根(gen)據所述放(fang)(fang)電(dian)(dian)電(dian)(dian)流(liu)進行(xing)放(fang)(fang)電(dian)(dian)。

31、進(jin)一步的，所述根據所述當前電(dian)量(liang)對(dui)電(dian)池包進(jin)行放電(dian)或充電(dian)，包括：

32、電池包充電步驟：

33、接收儲能變流(liu)器pcs充電功(gong)率值，根(gen)據(ju)所述充電功(gong)率值進行充電；其中，根(gen)據(ju)公式：

34、

35、計算每(mei)個電池(chi)(chi)包需要(yao)(yao)充電的(de)功(gong)率值pi，根據(ju)所述每(mei)個電池(chi)(chi)包需要(yao)(yao)充電的(de)功(gong)率值對電池(chi)(chi)包進行充電；

36、其中(zhong)，qk為(wei)充(chong)電(dian)狀(zhuang)(zhuang)態下(xia)每(mei)個(ge)電(dian)池包(bao)(bao)的(de)(de)總容量功(gong)(gong)率(lv)值；qk為(wei)充(chong)電(dian)狀(zhuang)(zhuang)態下(xia)每(mei)個(ge)電(dian)池包(bao)(bao)的(de)(de)功(gong)(gong)率(lv)值；qi為(wei)充(chong)電(dian)狀(zhuang)(zhuang)態下(xia)多個(ge)電(dian)池包(bao)(bao)中(zhong)的(de)(de)一個(ge)電(dian)池包(bao)(bao)的(de)(de)總容量功(gong)(gong)率(lv)值；qi為(wei)充(chong)電(dian)狀(zhuang)(zhuang)態下(xia)多個(ge)電(dian)池包(bao)(bao)中(zhong)的(de)(de)一個(ge)電(dian)池包(bao)(bao)的(de)(de)功(gong)(gong)率(lv)值。

37、進一步的，所(suo)述方(fang)法還包括：

38、充放電單元根(gen)(gen)據接(jie)收到的每個電池包需要(yao)充電的功率值pi進(jin)行設(she)置電池包放電電流(liu)，其中，所述(shu)充電電流(liu)是(shi)根(gen)(gen)據公(gong)式：

39、

40、確定(ding)的，其中，pi每個(ge)電(dian)(dian)(dian)池(chi)包需要(yao)充(chong)電(dian)(dian)(dian)的功率值(zhi)pi；ui為每個(ge)充(chong)放(fang)電(dian)(dian)(dian)單元(yuan)的充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)；根據(ju)所(suo)述充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)進行充(chong)電(dian)(dian)(dian)。

41、基于同一發明構思，本技術實(shi)施(shi)例另一方面還提(ti)供了(le)一種(zhong)儲能系(xi)統(tong)電池包級電池充放電裝(zhuang)置，包括：

42、標(biao)定(ding)單元(yuan)，用(yong)于對一個或多個電(dian)池包進行soc標(biao)定(ding)生成soc標(biao)定(ding)結(jie)果(guo)，并更新為所述(shu)soc標(biao)定(ding)結(jie)果(guo)，其(qi)中(zhong)，對同一電(dian)池簇中(zhong)不同電(dian)池包進行soc標(biao)定(ding)；

43、獲取單元，用(yong)于獲取放(fang)電(dian)結(jie)束時(shi)刻的soc值(zhi)(zhi)，根據所述(shu)放(fang)電(dian)結(jie)束時(shi)刻的soc值(zhi)(zhi)和初(chu)始(shi)soc值(zhi)(zhi)計算電(dian)池包所能存儲的最(zui)大電(dian)量值(zhi)(zhi)；

44、計算單元，用于(yu)根據所述(shu)最大(da)電量值(zhi)計算總(zong)電量，并(bing)根據總(zong)電量確定其中一個電池包的當(dang)前電量；

45、控制(zhi)單元(yuan)，用(yong)于根據所述當前電(dian)(dian)量對電(dian)(dian)池包進行放電(dian)(dian)或充電(dian)(dian)。

46、基于同一發明構(gou)思(si)，本技術實施例另(ling)一方面(mian)還提供了一種電子設備，包括：處理器、通(tong)信(xin)(xin)(xin)接口(kou)(kou)、存儲(chu)器和通(tong)信(xin)(xin)(xin)總線，其(qi)中，處理器、通(tong)信(xin)(xin)(xin)接口(kou)(kou)和存儲(chu)器通(tong)過通(tong)信(xin)(xin)(xin)總線完成相互間的通(tong)信(xin)(xin)(xin)；

47、存(cun)(cun)儲器，存(cun)(cun)儲有計算機(ji)程序；

48、處理(li)器，執行(xing)存(cun)儲(chu)器存(cun)儲(chu)的程(cheng)序時，實現所述(shu)的儲(chu)能系統(tong)電池包級(ji)電池充放(fang)電。

49、基于(yu)同一(yi)(yi)發明構思(si)，本技術實(shi)施(shi)例另一(yi)(yi)方面還提供了一(yi)(yi)種計算(suan)機(ji)可(ke)讀存儲介質，存儲有計算(suan)機(ji)程序，所(suo)述計算(suan)機(ji)程序被處理(li)器(qi)執行(xing)時(shi)，實(shi)現所(suo)述的(de)一(yi)(yi)種儲能系統(tong)電池包級電池充放電。

50、本(ben)公開的有益效果：

51、本公開通過(guo)(guo)對(dui)(dui)一(yi)個(ge)(ge)或(huo)多個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)進行soc標定生成soc標定結(jie)果，并更新為所(suo)(suo)(suo)述soc標定結(jie)果，其中(zhong)，對(dui)(dui)同一(yi)電(dian)(dian)(dian)(dian)(dian)池(chi)簇中(zhong)不同電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)進行soc標定；獲取放電(dian)(dian)(dian)(dian)(dian)結(jie)束(shu)時(shi)刻(ke)的(de)(de)soc值(zhi)(zhi)，根(gen)據所(suo)(suo)(suo)述放電(dian)(dian)(dian)(dian)(dian)結(jie)束(shu)時(shi)刻(ke)的(de)(de)soc值(zhi)(zhi)和初始soc值(zhi)(zhi)計算電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)所(suo)(suo)(suo)能存儲的(de)(de)最大電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)值(zhi)(zhi)；根(gen)據所(suo)(suo)(suo)述最大電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)值(zhi)(zhi)計算總電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)，并根(gen)據總電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)確定其中(zhong)一(yi)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)的(de)(de)當(dang)前電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)；根(gen)據所(suo)(suo)(suo)述當(dang)前電(dian)(dian)(dian)(dian)(dian)量(liang)(liang)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)進行放電(dian)(dian)(dian)(dian)(dian)或(huo)充電(dian)(dian)(dian)(dian)(dian)。由此可見(jian)，能夠解(jie)決儲能系統中(zhong)，電(dian)(dian)(dian)(dian)(dian)池(chi)長期使用(yong)后，電(dian)(dian)(dian)(dian)(dian)池(chi)充放電(dian)(dian)(dian)(dian)(dian)不均衡的(de)(de)情(qing)況。電(dian)(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)(dian)過(guo)(guo)程中(zhong)，對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)soc較(jiao)低(di)的(de)(de)多補電(dian)(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)(dian)池(chi)放電(dian)(dian)(dian)(dian)(dian)過(guo)(guo)程中(zhong)，對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)soc低(di)的(de)(de)限制輸出功率，保持(chi)電(dian)(dian)(dian)(dian)(dian)池(chi)包(bao)間soc一(yi)致。

52、本公(gong)開的(de)(de)其(qi)它特征和優點將在隨后的(de)(de)說(shuo)明(ming)書中闡(chan)述，并且，部分地從說(shuo)明(ming)書中變得(de)(de)顯(xian)而(er)易見，或者通(tong)過實(shi)施本公(gong)開而(er)了(le)解。本公(gong)開的(de)(de)目(mu)的(de)(de)和其(qi)他優點可通(tong)過在說(shuo)明(ming)書以(yi)及附圖中所指出的(de)(de)結構(gou)來實(shi)現和獲得(de)(de)。