CN116666834A - 一种电动自行车用的锂电池 - Google Patents
一种电动自行车用的锂电池 Download PDFInfo
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 70
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- 238000012546 transfer Methods 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 10
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
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Abstract
本发明涉及一种电动自行车用的锂电池,包括保护锂电池组的外壳,加热膜通过便携电源插座连接充电宝进行补温,热量通过导热件进行交换以实现散热和吸热,隐蔽式BMS‑PCB板结构防止人为破坏并防盗,采用LFP电芯组成锂电池组,各电芯间配合安装有传热导片进行集热或放热,热量通过集热片收集,再通过散热片进行热交换,具有散热和在寒冷季节补温的双重作用。该锂电池具有良好的使用效果,也可以用于电动三轮车、电动摩托车的电源使用,适合于寒冷地域的应用。
Description
技术领域
本发明涉及锂电池领域,特别涉及一种电动自行车用的锂电池。
背景技术
电动自行车作为代步工具,极大的方便了居民出行需要,用于电动自行车的锂电池也成为主流,故而市场上有着各类型的锂电池供消费者选用。目前所知锂电池存在的问题有:(1)GB 17761-2018中第4.1款第e)项规定了蓄电池标称电压应不大于48V;(2)锂电池内部线路凌乱,不利于焊接和后期维护;(3)在寒冷气候条件下锂电池需要补温而消耗其内部电池的电能,进而影响了电池寿命;(4)锂电池的存在一定的散热问题,进而需要改善;(5)提高锂电池的安全使用性能,其防盗效果要好。
发明内容
本发明针对背景技术所述的有关问题,提供一种电动自行车用的锂电池,本发明采用的技术方案为:所述电动自行车用的锂电池,包括外壳9,所述外壳9包括电池仓91和顶盖92;所述顶盖92上面中部位置安装有提手7,并且顶盖92上面安装有电源插座8和便携电源插座6;所述电源插座8包括对称设置的充电插座81和放电插座82;所述电池仓91与顶盖铆接,电池仓91内安装有锂电池组5、加热膜1、隔板05和BMS-PCB板01。
进一步的,所述锂电池组5由16块软包LFP电芯51串联组成,锂电池组5的下部安装有加热膜1,所述加热膜1底部设置有隔板05,所述隔板05固定安装于电池仓91的下部,其底部留有的空间内安装有BMS-PCB板01;所述16块软包LFP电芯51为串联,第1块负极与第2块正极电性连接,如此类推将16块电性连接后,则第1块正极与BMS-PCB板01上的正极电芯接入端子通过电线连接,所述BMS-PCB板01上还具有2个正极端子,其中一个正极端子与放电插座82通过电线连接,另一个正极端子与充电插座81通过电线连接,第16块负极与放电插座82和充电插座81连接,则形成直流回路;16块软包LFP电芯51的各正极和第16块的负极通过信号线缆引出后与BMS-PCB板01信号端连接,则形成信号采集线路;所述加热膜1与便携电源插座6通过电线连接。
进一步的,所述软包LFP电芯51为正负极位于同侧,其正负极通过极片接线PCB板02串联;所述极片接线PCB板02上印刷有正负极线路023及电芯信号采集线路024,以及固定于极片接线PCB板02上的正负极端子021和信号线端子022,并通过插排线与BMS-PCB板01对应连接。
进一步的,所述各软包LFP电芯51间夹有传热导片4,各传热导片4与集热片3连接并形成一体式的导热件,所述导热件下部与散热片2紧密接触,所述散热片2下部安装有加热膜1,所述加热膜1下部安装有隔板05;所述隔板05为下部具有敞开口的方型体,其内部顶部固定有隔热膜03,所述隔热膜03的下方安装有BMS-PCB板01。
进一步的,所述各软包LFP电芯51成组后,通过上、下两条绝缘胶带04进行固定。
进一步的,所述传热导片4为栅片状布置,则软包LFP电芯51夹于两栅片之间;所述集热片3与传热导片4的一端固定连接;传热导片4和集热片3选用铜模或铝膜中的一种。
进一步的,所述散热片2的一面为加工成阵列状鳍片21面,其相对面为抛光的平面;散热片2选用铝合金。
进一步的,所述隔板05各边中部位置开设有线缆槽051,以通过插排线。
进一步的,所述锂电池组5的侧面上安装有温度传感器,所述温度传感器与BMS-PCB板01通过插排线连接。
进一步的,所述锂电池组5装入电池仓91内,在所述上部的绝缘胶带04表面衬有粘结的橡胶缓冲条。
实施本发明的有益效果:本发明所述的电动自行车用的锂电池也可以用于电动三轮车、电动摩托车的电源使用,,适合于寒冷地域的应用。其特点如下:(1)该电池设置有便携电源插座6,使用充电宝为加热膜1提供电能,避免了消耗锂电池内部电池的电能,进而其使用寿命得到保障,适合于寒冷气候条件下的使用;(2)采用16块软包LFP电芯51串联组成的锂电池组5符合GB 17761-2018中第4.1款第e)项的规定,综合提高了其安全性能;(3)BMS-PCB板01的隐蔽性结构,既防止人为破坏,又具有良好的防盗性能;(4)导热件的结构通过传热导片4收集各LFP电芯51的热量,将其传导至集热片3上并通过散热片2散发至电池仓91的侧壁空间以散热,同时在给锂电池补温时通过该结构进行热量传导,保证了各LFP电芯51均能够获得良好的补温效果,并降低了补温电源的电能消耗;(5)蜂鸣器的设置实现了警示功能,以提醒锂电池存在故障;(6)GPS和4G能够通过BMS-PCB板01管理软件在线上进行监控锂电池,获取其电参数数据及即时位置。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中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。
图1:本发明中的外壳示意图;
图2:本发明中的锂电池组示意图;
图3:锂电池组电性连接示意图;
图4:图2的俯视图;
图5:图4的B-B剖视图;
图6:导热件示意图;
图7:散热片示意图;
图8:隔板示意图;
图9:提手剖视图;
图中:外壳9、电池仓91、顶盖92、电源插座8、充电插座81、放电插座82、提手7、U形环71、天线座72、梅花螺钉73、六角螺母74、GPS天线75、4G天线76、便携电源插座6、锂电池组5、软包LFP电芯51、传热导片4、集热片3、散热片2、矩形片21、加热膜1、BMS-PCB板01、极片接线PCB板02、正负极端子021、信号线端子022、正负极线路023、电芯信号采集线路024、隔热膜03、绝缘胶带04、隔板05、线缆槽051。
实施方式
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做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
在本发明其中一个实施例中,请参阅附图1所示。
实施例1:一种电动自行车用的锂电池,包括外壳9,所述外壳9包括电池仓91和顶盖92;所述顶盖92上面中部位置安装有提手7,并且顶盖92上面安装有电源插座8和便携电源插座6;所述电源插座8包括对称设置的充电插座81和放电插座82;所述电池仓91与顶盖铆接,电池仓91内安装有锂电池组5、加热膜1、隔板05和BMS-PCB板01。
该电动自行车用的锂电池,所述锂电池组5与BMS-PCB板01电性连接,所述BMS-PCB板01与充电插座81和放电插座82电性连接,所述加热膜1与便携电源插座6电性连接;在其使用中,加热膜1可在寒冷气候条件下为锂电池组5提供热量以达到较好的锂电池放电温度,进而适应于寒冷地域环境下的使用,其外接的电源可采用充电宝接入便携电源插座6,具有更好的灵活性,并避免了使用锂电池组5为其提供加热电源,由于锂电池组5在低温时其工况不符合其放电要求,频繁的放电会造成其电芯内部材料的损伤而影响其使用寿命,进而不具备经济性;此时采用充电宝则解决了此问题,受益于充电宝通常随身携带而不会处于低温环境充电的情形,通常充电宝可在此境况下满足放电的需要。
实施例2:作为实施例1具体的结构,请参阅附图2、3所示:所述锂电池组5由16块软包LFP电芯51串联组成,锂电池组5的下部安装有加热膜1,所述加热膜1底部设置有隔板05,所述隔板05固定安装于电池仓91的下部,其底部留有的空间内安装有BMS-PCB板01;所述16块软包LFP电芯51在串联中,第1块负极与第2块正极电性连接,如此类推将16块电性连接后,则第1块正极与BMS-PCB板01上的正极电芯接入端子通过电线接后,所述BMS-PCB板01上还具有2个正极端子,其中一个正极端子与放电插座82通过电线连接,另一个正极端子与充电插座81通过电线连接,第16块负极与放电插座82和充电插座81连连接,则形成直流回路;16块软包LFP电芯51的各正极和第16块的负极通过信号线缆引出后与BMS-PCB板01信号端连接,则形成信号采集线路;所述加热膜1与便携电源插座6通过电线连接。
该电动自行车用的锂电池,其标称电压为48V,符合GB 17761-2018中第4.1款第e)项的规定而适用于电动自行车的日常使用,随着软包LFP电芯研发技术和制造技术的提高,其能量密度得以持续提高,目前已达到50Ah以上,进而增加了电动自行车的长续航里程需要。BMS-PCB板01安装于电池仓91的下部与隔板05所在的空间内具有一定的隐蔽性,目的在于防止极端情况下对其的人为破坏,以保持锂电池的电源管理功能不被中断和终止,通过BMS-PCB板01与无线网络通信,则可以获知其有关信息,安全性进一步得到提高,且具有良好的防盗性能。
实施例3:基于实施例2,请参阅附图4、5所示:所述锂电池组5的优选结构为:所述软包LFP电芯51为正负极位于同侧,其正负极通过极片接线PCB板02串联;所述极片接线PCB板02上印刷有正负极线路023及电芯信号采集线路024,以及固定于极片接线PCB板02上的正负极端子021和信号线端子022,并通过插排线与BMS-PCB板01对应连接。
采用上述极片接线PCB板02以连接各软包LFP电芯51的正负极,具有避免布线而带来的凌乱,利于焊接和后期的维护,其结构紧凑且提高了软包LFP电芯51的紧固性能。
所述各软包LFP电芯51间夹有传热导片4,各传热导片4与集热片3连接并形成一体式的导热件,所述导热件下部与散热片2紧密接触,所述散热片2下部安装有加热膜1,所述加热膜1下部安装有隔板05;所述隔板05为下部具有敞开口的方型体,其内部顶部固定有隔热膜03,所述隔热膜03的下方安装有BMS-PCB板01。
由于软包LFP电芯51在工作中会产生一定的热量,则传热导片4将该热量传导至集热片3上,再通过散热片2散发热量,最终热量由电池仓91的侧壁进行交换;该结构能够将各软包LFP电芯51侧面的热量传导并散发,进而提高了软包LFP电芯51的散热性能,以防止热失效的不利;另外,可在上述零部件的接触面上涂覆导热硅脂,以增加其导热性能。同时,在寒冷气候条件下,由加热膜1产生的热量由散热片2收集,再通过导热件将热量均匀的传导至各软包LFP电芯51的侧面,进而实现了均匀加热的目的,且该加热过程快捷、耗时短、耗能少,更加适合于采用充电宝作为加热电源使用的场景。而隔热膜03则隔离了热量向BMS-PCB板01传递,以提高其电气工作时的工况,则增加了其工作的稳定性,并且BMS-PCB板01的少量热量可由电池仓91的底部散发。
实施例4:基于实施例3,请参阅附图6-9所示,其中:
所述各软包LFP电芯51成组后,通过上、下两条绝缘胶带04进行固定。
所述传热导片4为栅片状布置,则软包LFP电芯51夹于两栅片之间;所述集热片3与传热导片4的一端固定连接;传热导片4和集热片3选用铜模或铝膜中的一种。
所述散热片2的一面为加工成阵列状矩形片21面,其相对面为抛光的平面;散热片2选用铝合金。
所述隔板05各边中部位置开设有线缆槽051,以通过插排线。
所述提手7包括U形环71和天线座72,所述天线座72为矩形体,其顶面两侧开设有一对螺栓通孔,其短边中部开设有一对沉孔,所述U形环71的两端卡入沉孔内;所述螺栓通孔内安装有梅花螺钉73和六角螺母74,所述左侧位置的梅花螺钉73和六角螺母74之间安装有GPS天线75,所述右侧位置的梅花螺钉73和六角螺母74之间安装有4G天线76;所述GPS天线75和4G天线76与BMS-PCB板01通过插排线连接。
需要说明的是,以下所提的温度传感器、橡胶缓冲条和BM561B智能软件板是根据上述实施例可在市场上进行购置的零部件,在具体制作过程中,可因地制宜的进行匹配,因此,附图中并未画出其所在的具***置。
所述锂电池组5的侧面上安装有温度传感器,以监测锂电池组5的表面温度,所述温度传感器与BMS-PCB板01通过插排线连接。
所述锂电池组5装入电池仓91内,在所述上部的绝缘胶带04表面衬有粘结的橡胶缓冲条,避免锂电池组5晃动。
本发明所述BMS-PCB板01选择了国内某厂所生产的BM561B智能软件板,其集成北斗GPS***件,且与上述实施例的锂电池相配套,该软件板上设置有蜂鸣器,用于报警以提醒锂电池存在故障。相应的,市场上拥有种类众多的保护板,可根据本发明所公开的实施例进行配套。
上述实施例中,为了简化图纸的画法,故而仅仅列出了必要的图素,而对于零部件之间的连接部分并未画出,而其连接方式可以选择现有技术中的可选方式进行连接和固定。以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种电动自行车用的锂电池,其特征在于,包括外壳(9),所述外壳(9)包括电池仓(91)和顶盖(92);所述顶盖(92)上面中部位置安装有提手(7),并且顶盖(92)上面安装有电源插座(8)和便携电源插座(6);所述电源插座(8)包括对称设置的充电插座(81)和放电插座(82);所述电池仓(91)与顶盖铆接,电池仓(91)内安装有锂电池组(5)、加热膜(1)、隔板(05)和BMS-PCB板(01)。
2.根据权利要求1所述的一种电动自行车用的锂电池,其特征在于,所述锂电池组(5)由16块软包LFP电芯(51)串联组成,锂电池组(5)的下部安装有加热膜(1),所述加热膜(1)底部设置有隔板(05),所述隔板(05)固定安装于电池仓(91)的下部,其底部留有的空间内安装有BMS-PCB板(01);所述16块软包LFP电芯(51)为串联,第1块负极与第2块正极电性连接,如此类推将16块电性连接后,则第1块正极与BMS-PCB板(01)上的正极电芯接入端子通过电线连接,所述BMS-PCB板(01)上还具有2个正极端子,其中一个正极端子与放电插座(82)通过电线连接,另一个正极端子与充电插座(81)通过电线连接,第16块负极与放电插座(82)和充电插座(81)连接,则形成直流回路;16块软包LFP电芯(51)的各正极和第16块的负极通过信号线缆引出后与BMS-PCB板(01)信号端连接,则形成信号采集线路;所述加热膜(1)与便携电源插座(6)通过电线连接。
3.根据权利要求2所述的一种电动自行车用的锂电池,其特征在于,所述软包LFP电芯(51)为正负极位于同侧,其正负极通过极片接线PCB板(02)串联;所述极片接线PCB板(02)上印刷有正负极线路(023)及电芯信号采集线路(024),以及固定于极片接线PCB板(02)上的正负极端子(021)和信号线端子(022),并通过插排线与BMS-PCB板(01)对应连接。
4.根据权利要求2所述的一种电动自行车用的锂电池,其特征在于,所述各软包LFP电芯(51)间夹有传热导片(4),各传热导片(4)与集热片(3)连接并形成一体式的导热件,所述导热件下部与散热片(2)紧密接触,所述散热片(2)下部安装有加热膜(1),所述加热膜(1)下部安装有隔板(05);所述隔板(05)为下部具有敞开口的方型体,其内部顶部固定有隔热膜(03),所述隔热膜(03)的下方安装有BMS-PCB板(01)。
5.根据权利要求3或4任一项所述的一种电动自行车用的锂电池,其特征在于,所述各软包LFP电芯(51)成组后,通过上、下两条绝缘胶带(04)进行固定。
6.根据权利要求5所述的一种电动自行车用的锂电池,其特征在于,所述传热导片(4)为栅片状布置,则软包LFP电芯(51)夹于两栅片之间;所述集热片(3)与传热导片(4)的一端固定连接;传热导片(4)和集热片(3)选用铜模或铝膜中的一种。
7.根据权利要求5所述的一种电动自行车用的锂电池,其特征在于,所述散热片(2)的一面为加工成阵列状鳍片(21)面,其相对面为抛光的平面;散热片(2)选用铝合金。
8.根据权利要求5所述的一种电动自行车用的锂电池,其特征在于,所述隔板(05)各边中部位置开设有线缆槽(051),以通过插排线。
9.根据权利要求5所述的一种电动自行车用的锂电池,其特征在于,所述锂电池组(5)的侧面上安装有温度传感器,所述温度传感器与BMS-PCB板(01)通过插排线连接。
10.根据权利要求6-9任一项所述的一种电动自行车用的锂电池,其特征在于,所述锂电池组(5)装入电池仓(91)内,在所述上部的绝缘胶带(04)表面衬有粘结的橡胶缓冲条。
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