WO2024017147A1 - 电池包预警系统、预警方法、车辆及存储介质 - Google Patents

电池包预警系统、预警方法、车辆及存储介质 Download PDF

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Publication number
WO2024017147A1
WO2024017147A1 PCT/CN2023/107357 CN2023107357W WO2024017147A1 WO 2024017147 A1 WO2024017147 A1 WO 2024017147A1 CN 2023107357 W CN2023107357 W CN 2023107357W WO 2024017147 A1 WO2024017147 A1 WO 2024017147A1
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WIPO (PCT)
Prior art keywords
battery pack
early warning
acoustic wave
grille
box
Prior art date
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Ceased
Application number
PCT/CN2023/107357
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English (en)
French (fr)
Inventor
卢军
董昊旻
李黎黎
南海
刘茹
尹炳江
岳振东
兰超
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FAW Group Corp
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FAW Group Corp
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Publication of WO2024017147A1 publication Critical patent/WO2024017147A1/zh
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Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • This application relates to the technical field of battery packs, for example, to a battery pack early warning system, early warning method, vehicle and storage medium.
  • Power batteries are the power components of new energy vehicles, and power batteries are often installed on vehicles in the form of battery packs. Therefore, the safety and stability of battery packs are particularly important for vehicles. In related technologies, battery packs are prone to thermal runaway due to poor quality or improper use, which can cause vehicle fires or deflagration, threatening the safety of drivers and passengers.
  • thermal runaway conditions are monitored by arranging temperature sensors or smoke sensors; however, the number and location of temperature sensors and smoke sensors are limited, and it is impossible to perform temperature and smoke detection on every single cell inside the battery pack.
  • Thermal runaway of a single cell will cause thermal runaway of adjacent single cells or even the entire battery pack; furthermore, when the smoke sensor detects smoke, it means that the thermal runaway of the battery pack has developed to a certain stage, and intervention is required at this time. It's too late. Therefore, battery packs in related technologies have problems such as difficulty in monitoring thermal runaway and insufficiently accurate and timely warnings.
  • This application provides a battery pack early warning system, early warning method, vehicle and storage medium to solve the problem of difficulty in thermal runaway monitoring of battery packs and insufficiently accurate and timely early warning.
  • This application provides a battery pack early warning system, including:
  • the sound wave conduit is arranged outside the box;
  • the sound wave conduit has a first end and a second end along the length direction of the sound wave conduit, and the first end of the sound wave conduit is connected to the on the box and connected with the box;
  • An acoustic wave grille the acoustic wave grille is provided in the acoustic wave conduit;
  • a signal collector the signal collector is located at the acoustic wave grille and is configured to collect the deformation signal of the acoustic wave grille.
  • This application also provides a battery pack early warning method used in any of the above-mentioned battery pack early warning systems, Includes the following steps:
  • T is the deformation amount of the sonic grille when the entire battery pack is in a critical thermal runaway state
  • This application provides a vehicle, which includes:
  • processors one or more processors
  • memory configured to store one or more programs
  • the one or more processors implement any of the battery pack early warning methods described above.
  • a computer-readable storage medium on which a computer program is stored.
  • the program is executed by a processor, any one of the battery pack early warning methods described above is implemented.
  • FIG. 1 is a schematic structural diagram of the battery pack early warning system in the embodiment of the present application.
  • FIG. 2 is a structural perspective view of the battery pack early warning system in the embodiment of the present application.
  • FIG. 3 is a flow chart of the battery pack early warning method in the embodiment of the present application.
  • This embodiment provides a battery pack early warning system; the battery pack in this embodiment adopts a Cell To Pack (CTP) structure. Therefore, once the thermal runaway of a single battery occurs, it can easily spread to neighboring cells. single battery, thus causing thermal runaway of the entire battery pack.
  • the battery pack in this embodiment is pre- The warning system is used to warn the thermal runaway situation of the above-mentioned battery pack.
  • the battery pack early warning system includes a box 10, an acoustic wave guide 20, an acoustic wave grille 30 and a signal collector (not shown in the drawings); among them, the box 10 has multiple single cells built into it.
  • the single cells in the body 10 and the box 10 constitute a complete battery pack;
  • the acoustic waveguide 20 has a first end and a second end along the length direction of the acoustic waveguide 20, and the first end and the second end of the acoustic waveguide 20 are Both are provided with openings;
  • the sound wave conduit 20 is provided outside the box 10, and the first end of the sound wave conduit 20 is connected to the box 10 and communicates with the box 10, so that the sound waves of the sound inside the box 10 can pass through the sound wave conduit 20 spread to the outside world.
  • the acoustic wave grille 30 is disposed in the acoustic wave guide 20 , and the sound waves will pass through the acoustic wave grille 30 , causing vibration deformation of the acoustic wave grille 30 .
  • the signal collector is located at the acoustic wave grille 30 and configured to collect the deformation signal of the acoustic wave grille 30 .
  • the battery pack early warning system of the present application uses the cooperation of the acoustic wave grille 30 and the acoustic wave conduit 20 to obtain the thermal runaway situation inside the battery pack.
  • a single cell inside the battery pack thermally runs out of control, a sound will be emitted inside the battery pack.
  • the sound wave of the sound is transmitted to the outside through the acoustic wave conduit 20.
  • the sound wave passes through the acoustic wave conduit 20, it drives the built-in acoustic wave grille 30 to vibrate, causing the battery to thermally run away.
  • the acoustic wave signal is converted into a deformation signal of the acoustic wave grille 30, and then the thermal runaway situation inside the battery pack can be obtained in a timely and accurate manner based on the deformation signal.
  • the sound wave grille 30 is provided at the first end of the sound wave guide 20 , that is, the sound wave passes through the sound wave grille 30 as soon as it is transmitted from the box 10 , to prevent the sound wave from attenuating if the sound wave propagates in the sound wave guide 20 for too long, resulting in inaccuracy. The situation of thermal runaway in the box 10 is communicated.
  • the outer periphery of the box 10 is covered with a sound insulating member 40.
  • the sound insulating member 40 is configured to isolate the sound in the box 10 so that the sound is transmitted only through the sound wave conduit 20 as much as possible to avoid being radiated from other places, which helps to improve the early warning system. Accuracy of early warning.
  • the sound insulation member 40 is sound insulation cotton or aerogel.
  • the acoustic wave grille 30 is generally a mesh structure. When the sound wave passes through the acoustic wave grille 30, it does not hinder the propagation of the sound wave, but it will cause the vibration of the acoustic wave grille 30.
  • the sonic grille 30 has a cross-shaped grille structure, that is, the grid of the sonic grille 30 is a rectangle. In some other embodiments, the sonic grid 30 is not limited to a cross-shaped grid structure.
  • the grid of the mesh structure of the acoustic wave grille 30 may also be in a diamond shape or a triangle shape. Alternatively, the sonic grille 30 may be made of ferrous material.
  • a breathable valve or an explosion-proof valve can be provided at the second end of the sonic wave conduit 20, that is, the sonic wave conduit 20 is used as a pressure relief channel.
  • the breathable valve or explosion-proof valve provided on the sonic wave conduit 20 has the same function as the breathable valve or explosion-proof valve of the battery pack itself.
  • the explosion-proof valves are the same and play a role in releasing pressure from the battery pack, effectively preventing the spread of thermal runaway.
  • the signal collector is a vibration sensor.
  • the signal collector can obtain the vibration signal of the sonic grille 30 , convert the vibration signal into an electrical signal, and transmit the electrical signal to the control system of the early warning system.
  • the vibration signal of the sonic grating 30 includes but is not limited to the maximum deformation amount D 1 of the sonic grating 30 .
  • This embodiment also provides a battery pack early warning method, which is completed by using the above battery pack early warning system.
  • the battery pack early warning method includes the following steps:
  • S100 Use a signal collector to collect the maximum deformation amount D 1 of the sonic grating 30 .
  • T is the deformation amount of the sonic grille 30 when the entire battery pack is in a critical thermal runaway state.
  • step S400 early warning situations are divided into the following types:
  • the battery pack In the case of 1.1 ⁇ K ⁇ 1.4, the battery pack is in an extreme abnormal state.
  • step S200 the value ranges of A, B, and C are: 63° ⁇ A ⁇ 90°, 0.81 ⁇ B ⁇ 0.86, 0.27 ⁇ C ⁇ 0.35.
  • the battery pack early warning method of the present application obtains the maximum deformation amount of the sonic grille 30 and fits the maximum deformation amount.
  • the fitted deformation amount is the same as the deformation of the sonic grille 30 when the entire battery pack is in a critical thermal runaway state.
  • the safety factor K is obtained after comparing the variables. The more severe and complex the thermal runaway situation is, the greater the abnormal noise inside the battery pack, the greater the deformation of the sonic grille 30, and the lower the safety factor K.
  • a critical safety factor value (herein) is set. In the embodiment, it is 2). If the safety factor is lower than this critical safety factor value, it can be directly Then judge whether the battery pack status is abnormal.
  • the above-mentioned early warning method allows a more direct representation of the battery pack status through the setting of the safety factor, and can directly provide early warning based on the value of the safety factor.
  • the early warning method is intuitive and simple, and can complete early warning in a timely and accurate manner.
  • Embodiment 2 of the present application also provides a vehicle.
  • the components of the vehicle may include but are not limited to: a vehicle body, one or more processors, memories, and buses connecting different system components (including memories and processors).
  • the memory can be configured to store software programs, computer-executable programs and modules, such as program instructions corresponding to the battery pack early warning method in the embodiment of the present application.
  • the processor executes various functional applications and data processing of the vehicle by running software programs, instructions and modules stored in the memory, that is, implementing the above battery pack early warning method.
  • the memory may include a stored program area and a stored data area, wherein the stored program area may store an operating system and at least one application program required for a function; the stored data area may store data created based on the use of the terminal, etc.
  • the memory may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.
  • the memory may include memory located remotely from the processor, and these remote memories may be connected to the vehicle via a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
  • Embodiment 3 of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • a battery pack early warning method is implemented.
  • the battery pack early warning method includes the following steps:
  • S100 Use a signal collector to collect the maximum deformation amount D 1 of the sonic grating 30 .
  • T is the deformation amount of the sonic grille 30 when the entire battery pack is in a critical thermal runaway state.
  • a computer-readable storage medium provided by an embodiment of the present application.
  • the computer-executable instructions stored in the computer-readable storage medium are not limited to executing the method operations described above. They can also execute the battery pack provided by any embodiment of the present application. Related operations in the early warning method.
  • the present application can be implemented with the help of software and general hardware, and of course can also be implemented with hardware.
  • the technical solution of this application can be embodied in the form of a software product.
  • the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (Read-Only Memory, ROM), Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc.
  • Computer-readable storage media includes multiple instructions to make a computer device (can be a personal computer, server, or network device, etc. ) performs the methods described in multiple embodiments of this application.
  • the multiple units and modules included are only divided according to functional logic, but are not limited to the above divisions, as long as the corresponding functions can be realized; in addition, the specific name of each functional unit is just In order to facilitate mutual distinction, it is not used to limit the scope of protection of the present application.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池包预警系统、预警方法、车辆及存储介质。电池包预警系统包括箱体(10)、声波导管(20)、声波格栅(30)和信号采集器；箱体内置多个单体电池；声波导管(20)设于箱体(10)的外部；声波导管(20)的第一端连接于箱体(10)上，并与箱体(10)相连通；声波格栅(30)设于声波导管(20)内；信号采集器设于声波格栅(30)处，设置为采集声波格栅(30)的形变信号。电池包预警方法通过获得声波格栅的最大形变量，并根据最大形变量获得一安全系数，若安全系数低于设定的临界安全系数值，则可以直接进行电池包状态异常的判断。

Description

电池包预警系统、预警方法、车辆及存储介质
本申请要求在2022年07月18日提交中国专利局、申请号为202210844071.4的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池包技术领域，例如涉及一种电池包预警系统、预警方法、车辆及存储介质。
背景技术
动力电池是新能源汽车的动力部件，且动力电池往往以电池包的形式装配在车辆上，因此电池包的安全性和稳定性对于车辆尤其重要。相关技术中电池包由于质量差或者使用不当很容易发生热失控，进而引发车辆着火或者爆燃，威胁司乘安全。
相关技术中，通过布置温度传感器或者烟雾传感器来监测热失控情况；但是温度传感器和烟雾传感器的布置数量和位置有限，不可能对电池包内部的每个单体电池都进行温度和烟雾检测，而一个单体电池的热失控会引发临近的单体电池甚至整个电池包热失控；再者，当烟雾传感器检测到烟雾时，说明电池包的热失控已经发展到一定阶段了，此时再进行干预为时已晚。因此相关技术中的电池包存在热失控监测困难，预警不够精准及时的问题。
发明内容
本申请提供一种电池包预警系统、预警方法、车辆及存储介质，以解决电池包存在的热失控监测困难，预警不够精准及时的问题。
本申请提供一种电池包预警系统，包括：
箱体，所述箱体内置多个单体电池；
声波导管，所述声波导管设于所述箱体的外部；所述声波导管具有沿所述声波导管的长度方向的第一端和第二端，所述声波导管的第一端连接于所述箱体上，并与所述箱体相连通；
声波格栅，所述声波格栅设于所述声波导管内；
信号采集器，所述信号采集器设于所述声波格栅处，设置为采集所述声波格栅的形变信号。
本申请还提供一种用于上述任一所述的电池包预警系统的电池包预警方法， 包括如下步骤：
利用所述信号采集器采集所述声波格栅的最大形变量D1；
根据公式对最大形变量D1进行拟合，获得拟合后的拟合形变量D2；其中，A为所述声波格栅与所述声波导管之间的夹角，B为声波加强加权系统；C为格栅结构强度加权系数；
计算并获得安全系数K，其中，T为整个电池包处于临界热失控状态时所述声波格栅的形变量；
在K＜2的情况下，判断电池包状态异常，并进行预警。
本申请提供一种车辆，所述车辆包括：
一个或多个处理器；
存储器，设置为存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行时，所述一个或多个处理器实现上述任一所述的电池包预警方法。
一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述任一所述的电池包预警方法。
附图说明
图1为本申请实施例中电池包预警系统的结构示意图；
图2为本申请实施例中电池包预警系统的结构透视图；
图3为本申请实施例中电池包预警方法的流程图。
附图标记：
10、箱体；20、声波导管；30、声波格栅；40、隔音件。
具体实施方式
以下对在附图中提供的本申请的实施例的描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。
实施例一
本实施例提供一种电池包预警系统；本实施例中的电池包为电芯集成为电池包(Cell To Pack，CTP)构架，因此一旦一单体电池的热失控发生，很容易扩散到临近的单体电池，进而导致整个电池包的热失控，本实施例的电池包预 警系统就是用于预警上述电池包的热失控情况的。
参考图1和图2，电池包预警系统包括箱体10、声波导管20、声波格栅30及信号采集器(附图未示出)；其中，箱体10内置有多个单体电池，箱体10和箱体10内的单体电池构成了一个完整的电池包；声波导管20具有沿声波导管20的长度方向的第一端和第二端，声波导管20的第一端和第二端均设置开口；声波导管20设于箱体10的外部，声波导管20的第一端连接于箱体10上，并与箱体10相连通，进而箱体10内部声音的声波能通过声波导管20传出至外界。声波格栅30设于声波导管20内，进而声波会经过声波格栅30，引发声波格栅30的振动变形。信号采集器设于声波格栅30处，设置为采集声波格栅30的形变信号。
本申请的电池包预警系统采用声波格栅30与声波导管20的配合来获得电池包内部的热失控情况。当电池包内部一个单体电池热失控时会在电池包内部发出声音，声音的声波经由声波导管20传递至外部，声波经过声波导管20时带动内置的声波格栅30发生振动，将电池热失控的声波信号转化为声波格栅30的形变信号，进而根据形变信号就可以及时且准确获得电池包内部的热失控情况。
可选的，声波格栅30设于声波导管20的第一端，即声波一经箱体10传出便经过声波格栅30，避免声波在声波导管20中传播时间过长发生衰减，导致不能准确传达箱体10内热失控的情况。
箱体10的外周包覆有隔音件40，隔音件40设置为隔绝箱体10内的声响，使声音尽可能仅由声波导管20传出，避免从其它地方散发出去，有助于提高预警系统预警的准确性。可选地，隔音件40为隔音棉或者气凝胶。
声波格栅30一般为网状结构，声波经过声波格栅30时并不阻碍声波的传播，但会引发声波格栅30的振动。本实施例中，声波格栅30为十字型格栅结构，即声波格栅30的网格为矩形。在一些其它的实施例中，声波格栅30并不局限于十字型格栅结构。声波格栅30的网状结构的网格也可以为菱形或者三角形。可选地，声波格栅30可以由铁质材料制成。
在电池包内部的单体电池发生热失控时，电池包内部的气压会增大，此时如果不能及时泄压，压力增大到电池包的临界热失控状态时，电池包便会发生爆炸，波及到其它正常的单体电池，甚至导致整个电池包的报废。因此，可以在声波导管20的第二端设置透气阀或者防爆阀，即将声波导管20作为一个泄压通道，声波导管20上设置的透气阀或者防爆阀的作用与电池包自身具有的透气阀或者防爆阀相同，均起到对电池包泄压的作用，有效防止热失控的蔓延。
可选的，信号采集器为振动传感器，信号采集器能够获得声波格栅30的振动信号，将振动信号转换为电信号并将电信号传递至预警系统的控制系统中。声波格栅30的振动信号包括但并局限于声波格栅30的最大形变量D1。
本实施例还提供一种电池包预警方法，该预警方法利用上述的电池包预警系统完成。参考图3，该电池包预警方法包括如下步骤：
S100：利用信号采集器采集声波格栅30的最大形变量D1。
S200：根据公式对最大形变量D1进行拟合，获得拟合后的拟合形变量D2；其中，A为声波格栅30与声波导管20之间的夹角，B为声波加强加权系统；C为格栅结构强度加权系数。
S300：计算并获得安全系数K，其中，T为整个电池包处于临界热失控状态时声波格栅30的形变量。
S400：在K＜2的情况下，判断电池包状态异常，并进行预警。
在步骤S400中，预警情况分为以下几种：
在1.7≤K＜2的情况下，预警电池包为一般异常状态。
在1.4≤K＜1.7的情况下，预警电池包为严重异常状态。
在1.1≤K＜1.4的情况下，预警电池包为极限异常状态。
在K＜1.1的情况下，预警电池包热失控，并发出乘客逃生信号。
电池包实际热失控时，所发出的声响会越来越大，引发的声波格栅30的最大形变量D1也越来越大，安全系数K也就越来越低；即安全系数K越低，电池包的异常状态越为严重，越需要值得警觉；当安全系数K低到一定值时，便可以直接预警整个电池包热失控，并发出逃生信号，及时提醒车上乘客进行逃生。上述多个预警状态的设置，实现了电池包异常状态的合理层次划分，司乘人员可以直观获得电池包具体的热失控情况；此外，设置多个预警状态，司乘人员还可以了解电池包热失控的发展趋势，提前进行相关干预或者实施防范措施。
可选的，步骤S200中，A、B、C的取值范围分为为：63°＜A＜90°、0.81＜B＜0.86、0.27＜C＜0.35。
本申请的电池包预警方法通过获得声波格栅30的最大形变量，并对该最大形变量进行拟合，拟合后的形变量与整个电池包处于临界热失控状态时声波格栅30的形变量进行对比后得到安全系数K，热失控情况越剧烈和复杂，电池包内部的异响越大，声波格栅30的形变量越大，安全系数K越低，设置一个临界安全系数值(本实施例中为2)，若安全系数低于此临界安全系数值，则可以直 接进行电池包状态异常的判断。上述预警方法通过安全系数的设置使得电池包状态有了更直接的表征，并能根据安全系数的数值直接进行预警，预警方法直观简单，能够及时且精准地完成预警。
实施例二
本申请实施例二还提供一种车辆，车辆的组件可以包括但不限于：车辆本体、一个或者多个处理器，存储器，连接不同系统组件(包括存储器和处理器)的总线。
存储器作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请实施例中的电池包预警方法对应的程序指令。处理器通过运行存储在存储器中的软件程序、指令以及模块，从而执行车辆的多种功能应用以及数据处理，即实现上述的电池包预警方法。
存储器可包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器可包括相对于处理器远程设置的存储器，这些远程存储器可以通过网络连接至车辆。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
实施例三
本申请实施例三还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现一种电池包预警方法，该电池包预警方法包括如下步骤：
S100：利用信号采集器采集声波格栅30的最大形变量D1。
S200：根据公式对最大形变量D1进行拟合，获得拟合后的拟合形变量D2；其中，A为声波格栅30与声波导管20之间的夹角，B为声波加强加权系统；C为格栅结构强度加权系数。
S300：计算并获得安全系数K，其中，T为整个电池包处于临界热失控状态时声波格栅30的形变量。
S400：在K＜2的情况下，判断电池包状态异常，并进行预警。
本申请实施例所提供的一种计算机可读存储介质，计算机可读存储介质中存储的计算机可执行指令不限于执行如上所述的方法操作，还可以执行本申请任意实施例所提供的电池包预警方法中的相关操作。
通过以上关于实施方式的描述，本申请可借助软件及通用硬件来实现，当然也可以通过硬件实现。基于这样的理解，本申请的技术方案可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、闪存(FLASH)、硬盘或光盘等，计算机可读存储介质包括多个指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请多个实施例所述的方法。
上述实施例中，所包括的多个单元和模块只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；另外，每个功能单元的具体名称也只是为了便于相互区分，并不用于限制本申请的保护范围。

Claims (10)

  1. 一种电池包预警系统，包括：
    箱体(10)，所述箱体(10)内置多个单体电池；
    声波导管(20)，所述声波导管(20)设于所述箱体(10)的外部；所述声波导管(20)具有沿所述声波导管(20)的长度方向的第一端和第二端，所述声波导管(20)的第一端连接于所述箱体(10)上，并与所述箱体(10)相连通；
    声波格栅(30)，所述声波格栅(30)设于所述声波导管(20)内；
    信号采集器，所述信号采集器设于所述声波格栅(30)处，设置为采集所述声波格栅(30)的形变信号。
  2. 根据权利要求1所述的电池包预警系统，其中，所述声波格栅(30)设于所述声波导管(20)的第一端。
  3. 根据权利要求1所述的电池包预警系统，其中，所述箱体(10)的外周包覆有隔音件(40)。
  4. 根据权利要求1所述的电池包预警系统，其中，所述声波格栅(30)为十字型格栅结构。
  5. 根据权利要求1所述的电池包预警系统，其中，所述声波导管(20)的第二端设置透气阀；或
    所述声波导管(20)的第二端设置防爆阀。
  6. 一种用于权利要求1-5任一项所述的电池包预警系统的电池包预警方法，包括如下步骤：
    利用所述信号采集器采集所述声波格栅(30)的最大形变量D1；
    根据公式对最大形变量D1进行拟合，获得拟合后的拟合形变量D2；其中，A为所述声波格栅(30)与所述声波导管(20)之间的夹角，B为声波加强加权系统；C为格栅结构强度加权系数；
    计算并获得安全系数K，其中，T为整个电池包处于临界热失控状态时所述声波格栅(30)的形变量；
    在K＜2的情况下，判断电池包状态异常，并进行预警。
  7. 根据权利要求6所述的电池包预警方法，其中，在K＜2的情况下，判 断电池包状态异常，并进行预警包括：
    在1.7≤K＜2的情况下，预警电池包为一般异常状态；
    在1.4≤K＜1.7的情况下，预警电池包为严重异常状态；
    在1.1≤K＜1.4的情况下，预警电池包为极限异常状态；
    在K＜1.1的情况下，预警电池包热失控，并发出乘客逃生信号。
  8. 根据权利要求6所述的电池包预警方法，其中，A、B和C的取值范围分别为：63°＜A＜90°、0.81＜B＜0.86、0.27＜C＜0.35。
  9. 一种车辆，包括:
    至少一个处理器；
    存储器，设置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行时，所述至少一个处理器实现如权利要求6-8中任一所述的电池包预警方法。
  10. 一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如权利要求6-8中任一所述的电池包预警方法。
PCT/CN2023/107357 2022-07-18 2023-07-14 电池包预警系统、预警方法、车辆及存储介质 Ceased WO2024017147A1 (zh)

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