Lithium battery explosion, NASA robot instantly is destroyed-IT information

Lithium-ion battery explosion not only Samsung problem, is the problem of many agencies, including NASA. On June 14, 2016 United States NASA (NASA), Jet Propulsion Laboratory, four researchers ready to transfer a class robot ape RoboSimian. The robot is mainly used for rescue in case of danger. Researchers replaced the new lithium-ion battery, started charging for it, and left the laboratory. Over a period of time, RoboSimian lithium-ion battery exploded. First from behind the robots make up a cloud of smoke, followed by a fire. Flame an instant conflagration, fills the entire room, and finally curling up in a ball of fire burning. RoboSimian robot was burned down as a whole.

In fact, the lithium-ion battery explosion is not new. You can't check electronic cigarettes on the plane, because it has the potential to burn in the warehouse. Of course, you couldn't carry a Note 7 Samsung smartphones.

However, such as NASA robot RoboSimian lithium-ion battery explosion are different. JIEYI·huiteke, Professor of materials science and engineering, Carnegie Mellon University (Jay Whitacre) pointed out that "a single lithium-ion battery although there are potential dangers, but not causing a huge explosion. "Whitacre used to work at the Jet Propulsion Laboratory engaged in battery research. For mobile phones, it only has a single lithium-ion battery, but 96 RoboSimian robot. Note If you've seen a Samsung 7 battery power, so you can imagine the RoboSimian robot's lithium-ion battery explosion was unthinkable.

Moreover, many device is lithium-ion battery-powered NASA, sometimes these devices are also used in outer space. So if explosion in aerospace, the consequences would be more serious. Whitaker points out, "in a rapid release of energy within a limited space, is likely to be fatal. ”

According to laboratory safety director Amy Lynn Lee (Lynne Lee) that RoboSimian the power of the explosive equivalent of a bag of explosives. Although no final for the battery explosion, but Whitaker's explanations for the explosion, said between anode and cathode is filled with highly flammable lithium-ion batteries electrolyte. When the batteries begin charging, the ions move from the anode to the cathode. Whitaker points out, "when you charge the battery, and for which you are applying a current until the battery reaches the maximum voltage. When the battery reaches a voltage threshold, you should stop receiving power. If you do not stop charging, the battery may explode. ”

RoboSimian project leader Brett? Kennedy (Brett Kennedy) pointed out that overall without charging the battery pack as a whole. He pointed out that the "battery pack has a monitoring system to monitor the battery voltage and current. If the battery voltage or current exceeds a threshold, then stops the power supply. ”

But based on preliminary analysis, the battery pack a battery module has failed, causing it to monitoring system sends the wrong message. Results of individual battery overcharge happened, caused the explosion.

Whitaker did not comment on this assumption because it is only inferred by video. But he did not mention is that the explosion happened soon, instead of slow burning of common scenarios.

Whitaker points out, "the robot's battery pack is made up of many smaller battery module. A single battery problems are not uncommon. Broken battery module will heat burning affects the attachment of the battery module, then more burning. But the explosion, Whitaker said, "it is somewhat different, in my opinion, everything was happening at the same time. Or a battery module fried very quickly. “

Lee had pointed out in his speech, lithium-ion battery is "NASA an important part of the power". NASA Rover Mars, Juno Jupiter probe as well as lithium-ion batteries are widely used in the international space station.

But Whitaker also pointed out that lithium-ion batteries in the aerospace field, in particular satellite is very common in the area.

As a widely used power supply units lithium-ion battery is relatively efficient. In real flight plan, using lithium-ion batteries to go through from pre-sales to use extensive testing. Whitaker said that if battery inherent weaknesses, so NASA engineers will find earlier. In his view, "if I see this kind of thing in the actual flight plan, be very surprised. “

However, if a battery management system to fail, or situations, such as RoboSimian, due to an error parameter caused the explosion of the battery module, it will be very dangerous. As a spacecraft might not have adequate protective measures to shield such potential explosions. When performing outer space flight plans, the high cost of such protection measures, its needs in terms of ounces in weight.

Of course, RoboSimian is a non-flight technology program, Jet Propulsion Laboratory are currently studying how to use it to "Pack track structure or a large space telescope. "If its access to space in the future, which must go through extensive testing. And now, RoboSimian, as a project, the test is not as strict.

锂电池发生爆炸，NASA一机器人瞬间被摧毁 - IT资讯

锂离子电池爆炸不仅仅是让三星头疼的问题，也是包括NASA在内的诸多机构的难题。2016年6月14日在美国航空航天局（NASA）的喷气推进实验室里，四名研究人员准备转运一个类猿类机器人RoboSimian。该机器人的主要用于在危险情况下进行救援。研究人员为其更换了新的锂离子电池，开始为其充电，然后就离开了实验室。过来一段时间，RoboSimian的锂离子电池就发生了爆炸。先是从机器人的背后腾起一阵烟雾，随后出现一团火焰。火焰瞬间爆燃，填满整个房间，最后缩成一个火球稳定燃烧。整个RoboSimian机器人被烧毁。

事实上，锂离子电池的爆炸并不是什么新闻。你不能在飞机上托运电子烟，因为其有可能在货仓中燃烧。当然，你也不能携带一部三星Note 7智能手机。

但是，诸如NASA机器人RoboSimian锂离子电池的爆炸又有所不同。卡内基梅隆大学材料科学和工程学教授杰伊·惠特克（Jay Whitacre）指出，“单个锂离子电池虽然也有潜在的危险，但不会引起巨大的爆炸。”惠特克曾在喷气推进实验室从事电池科学研究工作。对于手机来说，其仅仅有单一一个锂离子电池，但RoboSimian机器人有96个。如果说你已经看到了三星Note 7电池爆炸的威力，那么可以想象RoboSimian机器人锂离子电池爆炸更是不可想象。

况且，NASA的很多设备也是锂离子电池驱动的，有时这些设备也被在外太空使用。因此如果在航空航天器内发生爆炸，那么后果会更严重。惠特克指出，“在一个有限空间内能量快速释放，很有可能是致命的。”

据实验室安全主管林恩·李（Lynne Lee）表示，RoboSimian的爆炸等同于一包炸药的威力。虽然对于此次电池爆炸还没有最终定论，但惠特克对于此次爆炸解释称，锂离子电池正负极之间充斥着高度易燃的电解液。当电池开始充电时，其中的离子从正极向负极移动。惠特克指出，“当你为电池充电时，就是为其通上电流，直至电池达到最大电压。当电池达到电压阈值时，就应当停止通电。如果此时不停止充电，那么电池就有可能发生爆炸。”

RoboSimian项目负责人布雷特?肯尼迪（Brett Kennedy）指出，总体上整个电池组没有过充。他指出，“电池组内有一个监控系统，会对电池的电压和电流进行实时监控。如果电池电压或电流超出阈值，那么将会停止供电。”

但基于初步分析，电池组的一个电池模块出现了故障，导致其向监控系统发送了错误信息。结果个别电池模块发生了过充，导致了爆炸。

惠特克并没有对这种假设发表意见，因为其仅仅是通过视频进行推断。但他并没有提及的是，爆炸发生的很快，而不是电池缓慢燃烧的常见情形。

惠特克指出，“机器人的电池组是由许多较小的电池模块组成的。单个电池模块出现问题并不少见。损坏的电池模块会发热燃烧，影响到附件的电池模块，随即发生更多燃烧。但是对于这次爆炸，惠特克称，”这有些不同，在我看来一切都是在同一时间发生的。或者某个电池模块炸的非常快。“

李曾在演讲中指出，锂离子电池是“NASA电力的重要组成部分“。NASA在好奇号火星探测器、朱诺木星探测器以及国际空间站中广泛采用了锂离子电池。

而惠特克也指出，锂离子电池在航空航天领域，特别是卫星领域非常常见。

作为广泛采用的供电设备，锂离子电池的效率相对较高。而在实际飞行计划中，所采用的锂离子电池要经过从售前到使用的大量测试。惠特克表示，如果是电池固有的缺陷，那么NASA的工程师早前就会发现。他认为，“如果我在实际飞行计划中看到这种事情，会非常惊讶。“

但是，如果是电池管理系统发生故障，或者是发生诸如RoboSimian这样的情况，由于一个电池模块的错误参数而引发爆炸，那将非常危险。因为一个航天器可能没有足够的防护措施来屏蔽这种潜在的爆炸。当执行外太空飞行计划时，这种防护措施的代价过于高昂，其重量需要以盎司来计。

当然，RoboSimian是一个非飞行的技术项目，喷气推进实验室目前正在研究如何使用它来“组装轨道结构或是超大型太空望远镜。“如果未来其进入太空，在此之前肯定要经历大量的测试。而现在，RoboSimian作为一个地面项目，其测试并没有那么严格。