CN100532148C - 燃料电池汽车和气体燃料汽车的放泄管安装结构 - Google Patents
燃料电池汽车和气体燃料汽车的放泄管安装结构 Download PDFInfo
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Abstract
本发明提供一种燃料电池汽车的放泄管安装结构,在副车架(22)与燃料电池盒(39)之间的空间中,在燃料电池盒(39)的排出口(170)的近旁,设置减压阀(50)的放泄管(51)的放泄口(52)。在燃料电池盒(39)的前壁(120)上,形成导入口(130),通过风扇(180)可以对燃料电池盒(39)内送风。被送风到燃料电池盒(39)内的空气成为换气流,一边通过燃料电池(38)进行换气,一边对燃料电池(38)进行冷却。排气从排气管(160)的排出口(170)向后方排出。放泄管(51)和放泄口(52)通过该排气被加热。从而,通过加热,可以解除因积雪或冻结引起的放泄口(52)的堵塞。
Description
技术领域
本发明涉及一种燃料电池汽车和气体燃料汽车的放泄管安装结构。
背景技术
在使用高压氢气的燃料电池汽车中,当储存高压氢气的氢燃料箱变为高温时,使用安全阀使氢气溢出,以实现降低压力(参考日本特开2002-206696号公报)。安全阀设置在氢燃料箱的附近,阀门动作由低熔点金属阻止,通常并不动作,随着氢燃料箱变为高温,当该金属熔化时,由高压气体推压阀芯而打开阀门,使氢气放泄,防止氢燃料箱内压的增加。
此外,当将氢气放泄到空气中时,氢气由于高压的作用,喷射时其能量就会很大,因此,为了抑制对外部的影响,在放泄口设置使氢气分散的屏蔽部件,这样的技术已被公知(参考日本特开2004-204956号公报)。
但是,应考虑到汽车在各种条件下的使用。例如,在积雪等低温环境下使用燃料电池汽车时,可以考虑到由于雪或水等的冻结而堵塞安全阀的放泄口的情况,然而,在上述现有技术中,并没有公开与此有关的技术。因此,可以预想,即使设置安全阀,但是由于放泄口的设置位置不当,就会不起作用。
本发明鉴于上述现有问题点而提出。本课题在于提供一种燃料电池汽车和气体燃料汽车的放泄管安装结构,上述燃料电池汽车和气体燃料汽车即使在低温环境下,安全阀的放泄口也不会堵塞,可以确保安全阀的功能。
发明内容
为此,本发明的燃料电池汽车具有:氢燃料箱,其用于储存作为燃料气体的氢气;燃料电池,其接受来自上述氢燃料箱的氢气供给并进行发电。上述燃料电池汽车在沿车辆的前后方向延伸的左右主车架的内侧,在上述车辆的地板下,从车辆的前方,顺序地配置上述燃料电池和上述氢燃料箱。在这样的燃料电池汽车中,本发明设置放泄管,当发生异常时,放泄管使上述燃料气体放泄,在上述放泄管中,至少其放泄口配置在上述左右主车架的内侧,并且配置在上述燃料电池和上述氢燃料箱之间的地板下区域。
由于在燃料电池汽车中的左右主车架的内侧并且在上述燃料电池和上述氢燃料箱之间的地板下区域是,没有设置电路配线或其它容器等的区域,因此不会出现从放泄口朝向电路配线或其它容器等放泄氢气的现象。此外,由于该区域是容易传导燃料电池所发热量的区域,因此,可以用于燃料电池的废热加热放泄口。
本发明还具有:燃料电池盒,其至少容纳上述燃料电池;换气装置,其对上述燃料电池盒进行换气。上述换气装置,朝向上述放泄口,将换气风送到上述燃料电池盒的后方。
从而,从燃料电池泄漏的氢气,也不会滞留在燃料电池盒内而是被排出,并且,可以通过该送风,强制地对放泄口进行加热。
在本发明中,使上述放泄口设置在比上述氢燃料箱的中心轴更高的位置。
从而,当换气装置朝向氢燃料箱的中心轴上方送风时,可以高效地加热放泄口。
本发明的气体燃料汽车具有:储气容器,其储存燃料气体;动力发生装置,其接受从上述储气容器供给的燃料气体而产生动力。在这样的气体燃料汽车中,设有放泄管,当发生异常时,放泄管使上述燃料气体放泄,在上述放泄管中,至少使其放泄口配置在由上述动力发生装置加热的部位。
从而,可以由上述动力发生装置的发热来加热放泄管的放泄口。
根据本发明,由于可以用燃料电池或动力发生装置的发热来加热放泄管的放泄口,当发生异常时,该放泄管放泄氢气等燃料气体,因此,可以防止放泄口因雪或水冻结等而被冻结并被堵塞。
附图说明
图1是表示燃料电池汽车中的燃料电池***的安装结构的俯视图。
图2是图1的侧面图。
图3是图1中的A-A截面图。
图4是表示本发明的放泄管和放泄口的配置位置的立体图。
图5是表示减压阀的放泄管的配置位置和燃料电池盒的换气结构的图。
具体实施方式
下面,对把本发明应用在燃料电池汽车中的一个实施方式进行说明。
图1是表示燃料电池汽车中的燃料电池***的安装结构的俯视图。图2是其侧面图。图3是图1中的A-A截面图。
在该安装结构中,燃料电池和氢燃料箱按照从前(前方)到后的顺序被安装在地板下。地板如图1和图2所示,在前地板(front floor)1的后缘,接合和形成有后地板(rear floor)2,其为在后方上升的阶梯成形(参考图2)。
在后地板2的下面,沿前后方向,接合有左右一对后车架(rearframe)13、14,在该后车架13、14的前端,在前地板1的侧边安装的侧栏(side sill)70、80,以及在该侧栏70、80的内侧沿前后方向配置的地板架(floor frame)5、6,分别通过各前支架(front bracket)11、12连接起来,在地板下,形成有左右一对Y字形的车架43、43。并且,在后地板2的阶梯部3的背面侧,跨过车宽方向,接合有横梁(crossmember)4(参考图1)。
在此,用后车架13、14以及地板架5、6,构成本发明中的主车架(main frame)。
在此,在前地板1的两侧边,左右分别连接有内侧栏7、8,在各内侧栏7、8的后端部,设有内侧栏延伸部9、10,在内侧栏7、8上,接合有外侧栏7′、8′(参考图1),形成上述侧栏70、80。
在各后车架13、14的后端部下面,安装有上面具有开放的截面形状的后支架17、18(参考图2)。该后支架17、18的侧壁接合到后车架(rearbracket)13、14的两侧壁外面,而在其前部的底壁上,直立设置有凸边螺母(collar nut)19、20(参考图2)。
此时,如图1所示,在左右的后车架13、14之间,前后接合有2个横梁4A、4B,分别在后端部,具体而言,在后支架17、18的后端,安装有保险杠21(参考图1)。
进而,通过螺栓23、23、23、23,副车架(sub frame)22从下方被固定在前支架11、12和后支架17、18的各凸边螺母15、16、19、20上。
由左右的车架部件24、25以及前后车架部件26、27,形成大致呈矩形框状的部件,在该部件上,副车架22沿车宽的方向具有横梁28,在由该横梁28划分的空间中,分别通过各卡箍31、32紧固2个氢燃料箱29、30,并把2个氢燃料箱29、30固定在车体上。
与车宽方向平行配置的氢燃料箱29、30,其上下方向的位置被设定成与后地板2之间形成一定的缝隙。
在副车架22上,安装有悬架滑柱(suspension unit)33,在该悬架滑柱33上,安装有未图示的轮胎。
进而,在左右的车架部件24、25的前端与前部车架部件26的两端之间的角部,设有***上述凸边螺母15、16的螺栓23、23的穿通部34、35(参考图1),在上述的左右车架部件24、25的后端与后部的车架部件27的两端之间的角部,设有***上述凸边螺母19、20的螺栓23、23的穿通部36、37。
在这样构成的副车架22的各穿通部34、35、36、37中,使螺栓23、23、23、23***贯通,将这些螺栓23、23、23、23***安装在后车架13、14的前支架11、12和后支架17、18上的凸边螺母15、16、19、20中,并且通过拧紧固定,将副车架22固定在地板架5、6上。
在前地板1的下面,跨过上述左右的地板架5、6,配置有燃料电池盒39,其中容纳有燃料电池单元NU,该燃料电池单元NU包含燃料电池38和燃气配管等***设备。通过从上述氢燃料箱29、30供给的氢气,与从未图示的压缩机供给的空气中的氧气之间的电化学反应,燃料电池38进行发电,通过将发电电力供给配置在未图示的车体前部的驱动用电机(未图示),驱动燃料电池汽车。
如图3的A-A截面图所示,燃料电池盒39具有覆盖燃料电池单元NU的箱主体39a和盖39b,从下方将螺栓40、40拧紧在螺母41、41上,就可使箱主体39a和盖39b固定在地板架5、6的底壁5a、6a上。并且,在侧栏70(80)上,安装车身中柱71(81)。在左右的地板架5、6与左右的侧栏70(80)之间,在单侧的3个位置、两侧的6个位置上,安装有托架42。
氢燃料箱29、30通过集合配管46在右侧相连接,高压配管47连接在该集合配管46上并沿着副车架22的车架部件25的内侧,拐入前侧的氢燃料箱29的前部,沿车架部件26、24的内侧,连接到配置在左侧的两个氢燃料箱29、30之间的稳压器48上,如图4所示,从该稳压器48向前侧延伸的中压配管49与安装在车架部件24上的减压阀50连接。连接在该减压阀50上的中压配管49的下游侧部分,在副车架22和燃料电池盒39之间的宽度尺寸范围内,架在两者上横跨两者,***并绑配在形成于左侧Y字状车架43上的作为空间部的股部44上,从燃料电池盒39的左后部背面侧,向内部的燃料电池单元NU内***贯通。另一方面,连接在减压阀50上的放泄管51,沿构成副车架22的车架部件26的外侧,绑配在燃料电池盒39与副车架22之间形成的空间中。
在燃料电池盒39中,设有导入空气的换气结构,一边通过空气对燃料电池盒39内进行换气,一边对燃料电池38进行冷却。
在氢燃料箱29、30中储存加压后的氢气,通过高压配管47和中压配管49,供给到燃料电池单元NU内。高压配管47内的氢气由稳压器48减压到预定的压力(例如,0.5MPa)。此时,例如有时由于稳压器48内的阀门出现异常,因此在高压配管47内的氢气在未能被充分减压的状态下被导入中压配管49,使中压配管49的氢气压力达到比上述预定压力更高的压力(例如,0.8MPa)。当出现中压配管49的压力例如成为2Mpa以上的异常情况时,减压阀50动作,就可从放泄管51、放泄口52排出氢气。
接下来,利用图5,对本发明的减压阀50的放泄管51和放泄口52的配置,进行说明。
图5是表示减压阀的放泄管的配置位置和燃料电池盒的换气结构的图。
如图5所示,在燃料电池盒39的前壁120上,沿车宽方向的右侧部设有导入口130。导入口130经由未图示的空气导入通路与风扇180连接。在燃料电池盒39的后壁140上,沿车宽方向两侧部,设有流过燃料电池盒39内的换气流的输出口150、150。进而,在燃料电池盒39的后壁140的外侧,设有排气管160、160,其分别与输出口150、150连接,并朝向车宽方向内侧延伸。在各排气管160的沿车宽方向的中央附近,分别设有排出口170,其朝向后方排出换气流。
如图5(b)所示,排气管160的排出口170被设置在比氢燃料箱29、30的轴线C更高的位置。为了利用从排出口170排出的热风进行加热,减压阀50的放泄管51配置成,如图5(a)所示,其沿着面对燃料电池盒39的后壁140的车架部件26的外侧,延伸到排气管160的排出口170的近旁。如图5(b)所示,放泄管51的放泄口52位于与排出口170基本同样的高度,亦即,位于比氢燃料箱29、30的轴线C更高的位置,如图4所示,就成为斜向朝下的状态。
当燃料电池38发电时,通过风扇180的送风,经由空气导入通路,从导入口130将空气导入燃料电池盒39内。如图5(a)的虚线箭头A所示,由于该空气成为换气流,朝向在燃料电池盒39的后壁140两侧设置的输出口150、150流出,因此,换气流以穿过燃料电池38的左右缝隙的状态流通。此外,在上下方向,由于导入口130位于输出口150、150的下方,因此如图5(b)虚线箭头B所示,换气流也以穿过燃料电池38的上下缝隙的状态流通。
通过该换气流,燃料电池盒39内被换气,同时,通过热交换,冷却燃料电池38。从燃料电池38夺取热量的换气流成为温暖的排气,从排出口170、170向后方排出。如图5(b)所示,由于2个排出口170、170被设置在比氢燃料箱29、30的轴线C更高的位置,因此,来自排出口170、170的排气朝向氢燃料箱29、30的上部流过,从而容易滞留氢气的氢燃料箱29、30与后地板2之间也被换气。
由于减压阀50的放泄管51被设置在燃料电池盒39与副车架22中的车架部件26之间的空间中,因此,上述放泄管51被燃料电池盒39散发的热加热,同时,当从排出口170、170排出排气时,放泄管51通过排气被加热。从而,在低温环境下,即使当放泄管51和放泄口52被雪等冻结而堵塞时,如果启动燃料电池汽车的话,可以用燃料电池38的热解除堵塞。从而,即使在低温环境下使用燃料电池汽车,也可以有效地防止因雪或冻结而使减压阀50不起作用的问题。
进而,即使在燃料电池汽车行驶过程中卷起积雪的情况下,由于放泄管51和放泄口52被设置在燃料电池盒39与副车架22中的车架部件26之间的空间中,又因为该空间是难于发生被雪堵塞的部位,且放泄口52被燃料电池盒39的热加热,因此,可以有效地防止由雪或冻结引起的放泄口52的堵塞。
在燃料电池汽车中,有关氢气的使用,已设定有技术规范。根据该技术规范,规定有下列要求,例如氢气的放泄口不得直接向乘员仓/货物仓开口,不得向车轮罩开口,不得向其它容器开口,不得向电路端子开口,不得向前方开口等要求。根据本实施方式,由于减压阀50的放泄管51和放泄口52被配置在燃料电池盒39与副车架22之间的空间中,因此,既可以满足这些条件,又可以构成解决冻结问题的措施。
亦即,放泄管51的一部分和放泄口52的配置位置处于构成主车架的地板架5、6和后车架13、14的内侧,并且设置在燃料电池38与氢燃料箱29、30之间的地板下区域,由于该地板下区域是没有设置电路配线或其它容器等的区域,因此,不会出现从放泄口向技术规范所限制的部件放泄氢气的现象。
在上述实施方式中,对减压阀的放泄管和放泄口进行了说明,但当氢燃料箱29、30发生异常时,例如在高温时,可紧急放泄氢燃料箱内的氢气。在设置紧急放泄阀的情况下,通过与上述实施方式相同地设定紧急放泄阀的放泄管和放泄口,既可同样地满足技术规范,又可构成解决冻结问题的措施。
并且,在上述实施方式中,作为解决放泄管和放泄口冻结问题的措施,对燃料电池汽车进行了说明,但并不仅限于此,例如也可应用在使用高压氢气的氢气发动机的气体燃料汽车中。在此情况下,用氢气发动机代替燃料电池,为了冷却氢气发动机的发热,同样地,使空气在氢气发动机或其冷却设备中流通,如果在该空气流通的通路中,设置减压阀或紧急放泄阀的放泄管和放泄口,就可以得到与本实施方式同样的效果。
Claims (3)
1.一种燃料电池汽车的放泄管安装结构,该燃料电池汽车具有:氢燃料箱,其储存作为燃料气体的氢气;燃料电池,其接受来自所述氢燃料箱的氢气供给并进行发电,在沿车辆的前后方向延伸的左右主车架的内侧,在所述车辆的地板下,从车辆的前方按顺序配置所述燃料电池和所述氢燃料箱,其特征在于,
设置有放泄管,当发生异常时,所述放泄管使所述燃料气体放泄,在所述放泄管中,至少放泄口配置在所述左右主车架的内侧,并配置在所述燃料电池和所述氢燃料箱之间的地板下区域。
2.如权利要求1所述的燃料电池汽车的放泄管安装结构,其特征在于,
还具有:
燃料电池盒,其至少容纳所述燃料电池;
换气装置,其对所述燃料电池盒进行换气,
所述换气装置,朝向所述放泄口,将换气风送到所述燃料电池盒的后方。
3.如权利要求1或2所述的燃料电池汽车的放泄管安装结构,其特征在于,
所述放泄口设置在比所述氢燃料箱的中心轴更高的位置。
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- 2005-11-29 US US10/584,999 patent/US7770679B2/en active Active
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CN1914057A (zh) | 2007-02-14 |
JP2006151303A (ja) | 2006-06-15 |
US20090025989A1 (en) | 2009-01-29 |
EP1818204B1 (en) | 2012-07-11 |
CA2551799C (en) | 2008-09-30 |
CA2551799A1 (en) | 2006-06-08 |
EP1818204A1 (en) | 2007-08-15 |
KR20070046020A (ko) | 2007-05-02 |
KR100806965B1 (ko) | 2008-02-22 |
US7770679B2 (en) | 2010-08-10 |
WO2006059599A1 (ja) | 2006-06-08 |
JP4383327B2 (ja) | 2009-12-16 |
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