CN113725466A - 一种无人机氢燃料电池动力系统 - Google Patents
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 75
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- 229910052744 lithium Inorganic materials 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 7
- RSHAOIXHUHAZPM-UHFFFAOYSA-N magnesium hydride Chemical compound [MgH2] RSHAOIXHUHAZPM-UHFFFAOYSA-N 0.000 claims description 14
- 229910012375 magnesium hydride Inorganic materials 0.000 claims description 14
- 150000004678 hydrides Chemical class 0.000 claims description 12
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Abstract
本发明涉及一种无人机氢燃料电池动力系统,包括反应釜、储氢罐、燃料电池、DC/DC转换器、锂电池、电机、换热器及水管路;所述反应釜中上部设置排气口,所述排气口通过氢气管路向储氢罐输送氢气,储氢罐向燃料电池供给氢气,燃料电池产生的水蒸气经所述换热器转化为液态水后输送至反应釜,所述燃料电池连接DC/DC转换器,所述DC/DC转换器连接锂电池及电机,所述燃料电池和/或锂电池向电机供电。
Description
技术领域
本发明涉及氢动力领域,特别涉及一种无人机氢燃料电池动力系统。
背景技术
在近年来,无人机产业在军民领域都快速发展,然而,现有无人机普遍存在一个短板问题,即续航时间短。普通的民用无人机在持续飞行的情况下普遍不超过45分钟。民用无人机小巧的体型限制了其本身重量不能过大,因此电池体积始终存在限制,若是增大电池容积,则耗能也会相对应的增加。同时,随着陆路运输快速脱碳项目发展,快速增长的航空运输业正迅速成为主要碳排放源,因此必须找到使航空更加可持续发展的方法。在对续航及环保的双重考虑下,合理利用清洁、可再生能源便是最好的解决方法之一。
氢能是清洁能源重要组成体系之一,其最安全高效的使用方式便是通过燃料电池转换为电能。其原理为氢气与氧气(或空气)发生电化学反应生成水并释放出电能和热能。燃料电池内的能量转化为从化学能至电能,在能量转化过程中无燃烧放热,从而摆脱了卡诺循环的限制,氢能的理论利用率最高可达80%。因此,在同样的重量下,燃料电池的能量贮存和转换效率都要远高于传统内燃机和锂电电池,采用燃料电池作为动力源来取代传统电池是完全可行的。因此,国内外早已开始考虑用燃料电池代替传统的锂电或内燃机,达到降低污染以及提高续航的目的。
由此可见,如何提高无人机续航及恶劣环境下的使用成了该领域急需解决的问题。
发明内容
为了克服上述现有技术的不足,本发明提供了一种无人机氢燃料电池动力系统。
本发明所采用的技术方案为:包括反应釜1、储氢罐2、燃料电池3、DC/DC转换器4、锂电池5、电机6、换热器7及水管路9;所述反应釜1中上部设置排气口,所述排气口15通过氢气管路10向储氢罐2输送氢气,储氢罐2向燃料电池3供给氢气,燃料电池3产生的水蒸气经所述换热器7转化为液态水后输送至反应釜9,所述燃料电池3连接DC/DC转换器4,所述DC/DC转换器4连接锂电池5及电机6,所述DC/DC转换器4和/或锂电池5向电机6供电。
进一步地,所述燃料电池3还设置有风机8,所述风机8向燃料电池3供给空气并调节燃料电池3的温度;
进一步地,还设置有电子调速器,所述电子调速器设置在DC/DC转换器和/或锂电池与电机之间;
进一步地,还设置有流量计,所述流量计安装在储氢罐至燃料电池的氢气管路10上;
进一步地,所述反应釜包括进水口17、搅拌桨12、氢化物储罐13、内置活塞14、排气口15、排液口16,氢化物通过内置活塞14推送至反应釜釜体11内;
进一步地,所述氢化物储罐13内存储氢化镁、氨硼烷、硼氢化钠、氢化钠、氢化锂中的一种;
进一步地,所述氢化镁、氨硼烷、硼氢化钠、氢化钠、氢化锂为球状颗粒;
进一步地,所述球状颗粒体积为8-12mm3;
进一步地,所述内置活塞14设置在横置管路上;
进一步地,所述水管路上设置双向泵;
进一步地,所述反应釜中添加催化剂,所述催化剂为氯化物(氯化镁、氯化钠);
与现有技术相比,本发明的有益效果是:
(1)首先锂电池连接至反应器上的活塞装置,活塞装置推动氢化物珠体,待珠体进入反应釜后,与反应釜内部的水进行水解反应,持续不断的产生氢气,氢气大量产生后,经过氢气管路到达储氢罐,储氢罐可以起到贮存氢气并按需求流量释放氢气的功能。通过调节储氢容器,使得氢气以11.67 L/min的速度被持续释放至燃料电池以满足燃料电池的额定功率,平稳产电,同时空气在风机的作用下由空气管路进入燃料电池;
(2)采用活塞装置推动珠体进入反应釜,可以简单有效的控制制氢反应的速率及产量,防止向氢化物中直接加水反应造成反应强度过高或者制氢量难以控制的问题;
(3)采用活塞装置推动珠体进入反应釜反应,可以防止大量氢化物反应过程中产生氢氧化镁类物质包裹在氢化物上,降低传质效率影响产氢;
(4)通过活塞装置对珠体推送速率,可以精确控制产氢速率及产氢量,防止燃料电池供氢不足或储氢罐内压力过大的问题;
(5)氢化镁作为氢化物使用时,氢化镁与水反应生产氢氧化镁,而催化剂可以选用氯化镁等氯化物,在催化剂作用下,氢化镁的产氢效率显著提高,同时由于氢氧化镁回收利用时需要转化为氯化镁,因此,氯化镁可以直接回收利用,不会对产生的“废液”产生污染及额外费用;
(6)设置储氢罐,将储存氢化物的罐体与反应釜分离设置,可以快速实现“能源”更换,方便“加氢”的实现;
(7)在水管路上设置双向泵,由于反应釜内反应为产热反应,当燃料电池内温度不能良好运行是,可以开启双向泵将“反应热水”部分输送至燃料电池部分,提高其产电效率使其达到额定电压;当燃料电池内产生水蒸气后,将水蒸气输送至换热器中换热产水,将产水回输到反应釜内降低氢氧化镁的浓度,提高产氢效率;
(8)采用该套设备的优势在于由于有蓄电池作为辅助电源,在同等动力需求下,整个动力系统的成本会明显降低,同时无人机系统对于燃料电池的动态响应的要求也会进一步降低,并且可以锂电池可以直接给予风机等装置电能,避免了燃料电池电压与风机等装置电压不匹配的情况。
附图说明
图1为一种无人机氢燃料电池动力系统示意图;
图2为一种反应釜示意图;
图3为一种反应釜示意图。
具体实施方式
下面通过实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
应当理解,本文所使用的诸如“具有”,“包含”以及“包括”术语并不排除一个或多个其它元件或其组合的存在或添加。
以下结合附图1-3,对本发明进一步说明:
实施例1
包括反应釜1、储氢罐2、燃料电池3、DC/DC转换器4、锂电池5、电机6、换热器7及水管路9;所述反应釜1中上部设置排气口,所述排气口15通过氢气管路10向储氢罐2输送氢气,储氢罐2向燃料电池3供给氢气,燃料电池3产生的水蒸气经所述换热器7转化为液态水后输送至反应釜9,所述燃料电池3连接DC/DC转换器4,所述DC/DC转换器4连接锂电池5及电机6,所述DC/DC转换器4和/或锂电池5向电机6供电。
实施例2
采用的驱动方式为燃料电池与蓄电池联合驱动,其中燃料电池作为主要动力源,蓄电池作为辅助动力源。
燃料电池与蓄电池均与驱动电机直连,同时燃料电池系统与蓄电池也相互连接。在正常飞行的情况下,采用燃料电池系统直接为电机供电。当需要起飞及紧急制动时由燃料电池及蓄电池共同给予电机电能。同时当蓄电池的电量较低时可以采用燃料电池对蓄电池进行充电,确保整个驱动系统有足够的动力来满足飞行需求。
实施例3
在实施例2的基础上,
将氢化镁送至盛有水的反应釜。其中氢化镁将被制成体积约为8~12 mm3小球(约47000颗),全部储存在储氢罐中,管路内径为10 mm,水平放置的管路内设置一可移动的活塞,每20秒推送一次,将部分氢化镁珠体送入反应器。预计2小时30分完成全部氢化镁的运输,确保不会产生过量的氢气使得反应釜内压力过大。提前产生的氢气将由储氢罐贮存。
其当反应开始时,釜底盛有200 g的低浓度氯化镁溶液,高度大约到反应器的1/3,能够没过搅拌桨,以保证反应开始后搅拌桨能够起到混合反应物,加快反应速率的作用。反应开始后,活塞向外移动,储罐内的氢化镁珠体在重力作用下下落至水平管路,活塞向内推动,封住其他氢化镁珠体下落的同时,推动已经落于管道的珠体向前移动,最终被送至反应器中。氢化镁珠体在接触到反应釜中的水后,会溶解并在催化剂的催化下发生水解反应,生成的氢气会通过排气口连接到氢气管路,供给燃料电池。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各科研领域测试数据的分析处理,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的实施例。
Claims (10)
1.一种无人机氢燃料电池动力系统,其特征在于,包括反应釜(1)、储氢罐(2)、燃料电池(3)、DC/DC转换器(4)、锂电池(5)、电机(6)、换热器(7)及水管路(9);所述反应釜(1)中上部设置排气口(15),所述排气口(15)通过氢气管路(10)向储氢罐(2)输送氢气,储氢罐(2)向燃料电池(3)供给氢气,燃料电池(3)产生的水蒸气经所述换热器7转化为液态水后输送至反应釜(9),所述燃料电池(3)连接DC/DC转换器(4),所述DC/DC转换器(4)连接锂电池(5)及电机(6),所述燃料电池(3)和/或锂电池(5)向电机(6)供电。
2.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,所述燃料电池(3)还设置有风机(8),所述风机(8)向燃料电池(3)供给空气并调节燃料电池(3)的温度。
3.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,还设置有电子调速器,所述电子调速器设置在DC/DC转换器和/或锂电池与电机之间。
4.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,还设置有流量计,所述流量计安装在储氢罐至燃料电池的氢气管路(10)上。
5.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,所述反应釜包括进水口(17)、搅拌桨(12)、氢化物储罐(13)、内置活塞(14)、排气口(15)、排液口(16),氢化物通过内置活塞(14)推送至反应釜(11)釜体内。
6.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,所述氢化物储罐(13)内存储氢化镁、氨硼烷、硼氢化钠、氢化钠、氢化锂中的一种。
7.如权利要求6所述的一种无人机氢燃料电池动力系统,其特征在于,所述氢化镁、氨硼烷、硼氢化钠、氢化钠、氢化锂为球状颗粒。
8.如权利要求7所述的一种无人机氢燃料电池动力系统,其特征在于,所述球状颗粒体积为8-12mm3。
9.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,所述内置活塞(14)设置在横置管路上;所述反应釜中添加催化剂,所述催化剂为氯化物。
10.如权利要求1所述的一种无人机氢燃料电池动力系统,其特征在于,所述水管路上设置双向泵。
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