波音787锂离子电池失效分析
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用飞机做实际振动测试时，高电压峰在充用46A充电时，通过检测开关已得到证实。 • Checking the contactor such that it is an operation different from the intended design due to the possibility
• It is believed that the exothermic phenomenon 6th cell interior is due to an internal short circuit, but it was not possible to determine its pathogenesis.
2013年1月7日（美国时间），在波士顿国际机场，飞机在起飞跑道上发现同款电池APU （飞机辅助动力装置）锂离子电池冒烟现象。
2. At Narita International Airport 14th Jan. 2014, the failure message of the BCU and main battery which is the same, was confirmed. The smoke is drifting out of the airplane is displayed.2014年1月14号在成田国际机场，缓冲控制器失效原因得到证实，同样是主电 池出问题，飞机中出现电池冒烟事故。
• damage situation of the 6th cell 第6节电芯发现损坏 - 3rd cell and the 6th cell welding 损坏发生在第3节电芯与第6节电芯焊接位置 - Large elongated holes in upper side of the cell case, the brace bar has been welded. 电池壳的上方有一个大的拉伸孔，连接杆已被焊接好。
在飞机起飞期间的发生的严重事故是由于主电池的热失控引起的，致使飞机不得不在高
松机场紧急迫降，人员通过紧急滑梯逃脱。
• Thermal runaway of the main battery is presumed to have started from the heat transmitted by the 6th cell is vented exothermic phenomenon. 据推测，主电池热失控是源于第6节电芯的热失控。
9
2019/11/24
Analysis on 来自百度文库auses of inner short circuit分析内部短路的原因
Contamination of the metal particles to the cell interior 金属颗粒对电池内部的污染
波音公司在测试瞬变现象时，通过检测放电前的开关，证实了高电压峰值的存在。 • In actual validation using aircraft, the transient phenomenon due to the contactor operation check before
discharge was observed. 用飞机做实际的振动测试时，瞬变现象是通过放电前的开关操作来观察检测的。 • From these results, it is considered possible that high voltage peak by transient is also applied in the
Main Battery Overview主电池概观
Main Battery Overview主电池概观
Detail of the damage status 损坏的具体情况
• In the battery box, there was no hole and discoloration due to arc discharge. 在电池壳中，没有发现由于电弧导致的孔和烧伤变色的现象。
• Change destinations to Takamatsu Airport from Tokyo Airport. 飞机由东京机场 改为高松机场迫降。
• After landing in Takamatsu Airport, emergency escape with T4 taxiway. 飞机在 高松机场着陆后，人员从T4飞机滑梯紧急逃生。
• ground wire is fused 地线熔化了 • There was no damage to the following parts. 壳体以下的部位是没有损坏的 - J3 cable connector and J3 cable - J1 cable J3放电口端子和J3数据采集线——J1线 • BCU found and no abnormalities, resulting to the equivalent test to pre-shipment inspection. BCU发现无异常现象，致使装出厂前检验 等效试验？？。 Since the all elements of cells are damaged by affected heating, it is difficult to confirm the
The high voltage peak caused by transient at the discharge time 高电压峰是由于放电的瞬 变现象所致。
• In the test of the Boeing Company, transients considered by checking the contactor before discharge, the appearance of a high voltage peak has been confirmed.
Related factors
Underestimation Affect of inner short circuit
Test at developing显 影
Charge control of the battery电池的充电控制
Vibration of the charging current 充电电流的波动
deposition of the metal and certain of the origin of the exothermic phenomenon. 由于电芯所有元件都因受热的影响而损坏，所以很难确认金属的沉积物（成分）和某种发热
现象的来源。
2019/11/24
Cause原因
• This serious incident is caused the thermal runaway of the main battery during the Aircraft takeoff climb, was carried out emergency landing with escape taxiway in Takamatsu Airport.
Cause原因
Serious incident (emergency escape)
Thermal runaway (main battery)
Arc discharge Huge current (earth line)
Exothermic phenomenon
Inner short circuit Can not be specified Case of inner short circuit
incident aircraft. 从这些结果来看，由于瞬变现象产生的高电压峰是有可能导致飞机事故的。
The voltage peak during charging 充电时的电压峰
• In actual validation using the aircraft, high voltage peak has been confirmed by checking the contactor during charging of 46A.
• Main battery of aircraft damage, fire does not occur.飞机的主电池损坏，但未 引发着火事故。
Other Incident of same type battery in Boeing 787。同种单元电池发生在波音787上的其它事 故
1. At Boston's Logan International Airport 7th Jan. 2013 (EST), smoke is generated from APU battery of the same type in the tarmac.
• By the contact between the brace bar and the cell case expanded by heat generation, large current flows in the battery box by grounding short-circuited through the grounding wire, resulting the arc discharge is generated and it is estimated that was led to thermal runaway. 连接杆和电池壳之间的接触，会因热量的产生而膨胀，且地线短路，大电流通往地线，导 致弧放电的产生，估计是热失控的原因所在。
• About 32,000ft altitude, the instrument display that indicates the failure of the main battery, and odor occurs in the cockpit. 波音787飞机约在32000英尺高空 中，飞机仪表显示主电池故障，同时驾驶员座舱也闻有异臭。
第6节电芯内部的放热现象是由于内部短路所致，但仍无法确定其发生机理。
• In this serious incident, the state of equipment of the aircraft can not be simulated properly in the test of the influence of the internal short circuit has been underestimated were involved. 在重大事故中，涉及到被低估的内部短路影响的测试问题在飞机设备的运行状态很难模 拟。
that high voltage transients may occur when performed at high current. It is believed that it is desirable improved. 检查不同期望设计的开关运行情况更加有效可行，因为在高电流执行时可能也会有高电压瞬变现象 发生。
• Vibration of the charging current has been confirmed in the actual testing and verification. 在实际试验和验 证中，充电电流的波动已得到证实。
• It is considered to be an unnecessary vibration, because it affects the battery life, be improved desirable. 振 动试验是多余的，因为其影响的是电池的寿命，可提高电池寿命。
Analysis of LIB Failure in case of Boeing 787 波音787锂离子电池失效分析
Hisaki Tarui Oct, 2014
Ref. Serious Incident Repot from Japan Transport Safety Board
Overview of aviation serious incident飞机重大事故概述
• It is believed that the exothermic phenomenon 6th cell interior is due to an internal short circuit, but it was not possible to determine its pathogenesis.
2013年1月7日（美国时间），在波士顿国际机场，飞机在起飞跑道上发现同款电池APU （飞机辅助动力装置）锂离子电池冒烟现象。
2. At Narita International Airport 14th Jan. 2014, the failure message of the BCU and main battery which is the same, was confirmed. The smoke is drifting out of the airplane is displayed.2014年1月14号在成田国际机场，缓冲控制器失效原因得到证实，同样是主电 池出问题，飞机中出现电池冒烟事故。
• damage situation of the 6th cell 第6节电芯发现损坏 - 3rd cell and the 6th cell welding 损坏发生在第3节电芯与第6节电芯焊接位置 - Large elongated holes in upper side of the cell case, the brace bar has been welded. 电池壳的上方有一个大的拉伸孔，连接杆已被焊接好。
在飞机起飞期间的发生的严重事故是由于主电池的热失控引起的，致使飞机不得不在高
松机场紧急迫降，人员通过紧急滑梯逃脱。
• Thermal runaway of the main battery is presumed to have started from the heat transmitted by the 6th cell is vented exothermic phenomenon. 据推测，主电池热失控是源于第6节电芯的热失控。
9
2019/11/24
Analysis on 来自百度文库auses of inner short circuit分析内部短路的原因
Contamination of the metal particles to the cell interior 金属颗粒对电池内部的污染
波音公司在测试瞬变现象时，通过检测放电前的开关，证实了高电压峰值的存在。 • In actual validation using aircraft, the transient phenomenon due to the contactor operation check before
discharge was observed. 用飞机做实际的振动测试时，瞬变现象是通过放电前的开关操作来观察检测的。 • From these results, it is considered possible that high voltage peak by transient is also applied in the
Main Battery Overview主电池概观
Main Battery Overview主电池概观
Detail of the damage status 损坏的具体情况
• In the battery box, there was no hole and discoloration due to arc discharge. 在电池壳中，没有发现由于电弧导致的孔和烧伤变色的现象。
• Change destinations to Takamatsu Airport from Tokyo Airport. 飞机由东京机场 改为高松机场迫降。
• After landing in Takamatsu Airport, emergency escape with T4 taxiway. 飞机在 高松机场着陆后，人员从T4飞机滑梯紧急逃生。
• ground wire is fused 地线熔化了 • There was no damage to the following parts. 壳体以下的部位是没有损坏的 - J3 cable connector and J3 cable - J1 cable J3放电口端子和J3数据采集线——J1线 • BCU found and no abnormalities, resulting to the equivalent test to pre-shipment inspection. BCU发现无异常现象，致使装出厂前检验 等效试验？？。 Since the all elements of cells are damaged by affected heating, it is difficult to confirm the
The high voltage peak caused by transient at the discharge time 高电压峰是由于放电的瞬 变现象所致。
• In the test of the Boeing Company, transients considered by checking the contactor before discharge, the appearance of a high voltage peak has been confirmed.
Related factors
Underestimation Affect of inner short circuit
Test at developing显 影
Charge control of the battery电池的充电控制
Vibration of the charging current 充电电流的波动
deposition of the metal and certain of the origin of the exothermic phenomenon. 由于电芯所有元件都因受热的影响而损坏，所以很难确认金属的沉积物（成分）和某种发热
现象的来源。
2019/11/24
Cause原因
• This serious incident is caused the thermal runaway of the main battery during the Aircraft takeoff climb, was carried out emergency landing with escape taxiway in Takamatsu Airport.
Cause原因
Serious incident (emergency escape)
Thermal runaway (main battery)
Arc discharge Huge current (earth line)
Exothermic phenomenon
Inner short circuit Can not be specified Case of inner short circuit
incident aircraft. 从这些结果来看，由于瞬变现象产生的高电压峰是有可能导致飞机事故的。
The voltage peak during charging 充电时的电压峰
• In actual validation using the aircraft, high voltage peak has been confirmed by checking the contactor during charging of 46A.
• Main battery of aircraft damage, fire does not occur.飞机的主电池损坏，但未 引发着火事故。
Other Incident of same type battery in Boeing 787。同种单元电池发生在波音787上的其它事 故
1. At Boston's Logan International Airport 7th Jan. 2013 (EST), smoke is generated from APU battery of the same type in the tarmac.
• By the contact between the brace bar and the cell case expanded by heat generation, large current flows in the battery box by grounding short-circuited through the grounding wire, resulting the arc discharge is generated and it is estimated that was led to thermal runaway. 连接杆和电池壳之间的接触，会因热量的产生而膨胀，且地线短路，大电流通往地线，导 致弧放电的产生，估计是热失控的原因所在。
• About 32,000ft altitude, the instrument display that indicates the failure of the main battery, and odor occurs in the cockpit. 波音787飞机约在32000英尺高空 中，飞机仪表显示主电池故障，同时驾驶员座舱也闻有异臭。
第6节电芯内部的放热现象是由于内部短路所致，但仍无法确定其发生机理。
• In this serious incident, the state of equipment of the aircraft can not be simulated properly in the test of the influence of the internal short circuit has been underestimated were involved. 在重大事故中，涉及到被低估的内部短路影响的测试问题在飞机设备的运行状态很难模 拟。
that high voltage transients may occur when performed at high current. It is believed that it is desirable improved. 检查不同期望设计的开关运行情况更加有效可行，因为在高电流执行时可能也会有高电压瞬变现象 发生。
• Vibration of the charging current has been confirmed in the actual testing and verification. 在实际试验和验 证中，充电电流的波动已得到证实。
• It is considered to be an unnecessary vibration, because it affects the battery life, be improved desirable. 振 动试验是多余的，因为其影响的是电池的寿命，可提高电池寿命。
Analysis of LIB Failure in case of Boeing 787 波音787锂离子电池失效分析
Hisaki Tarui Oct, 2014
Ref. Serious Incident Repot from Japan Transport Safety Board
Overview of aviation serious incident飞机重大事故概述