WO2020108308A1 - 一种锂电池的探测装置 - Google Patents

一种锂电池的探测装置 Download PDF

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Publication number
WO2020108308A1
WO2020108308A1 PCT/CN2019/118105 CN2019118105W WO2020108308A1 WO 2020108308 A1 WO2020108308 A1 WO 2020108308A1 CN 2019118105 W CN2019118105 W CN 2019118105W WO 2020108308 A1 WO2020108308 A1 WO 2020108308A1
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Prior art keywords
lithium battery
pressure
battery cell
detector unit
detector
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PCT/CN2019/118105
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English (en)
French (fr)
Inventor
李飞
谢娇娇
张尧
张厚亮
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哲弗智能系统（上海）有限公司
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Publication of WO2020108308A1 publication Critical patent/WO2020108308A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge

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  • the present disclosure relates to the technical field of lithium battery detection, and in particular to a lithium battery detection device.
  • the lithium battery thermal runaway detector is an indispensable part in the lithium battery fire protection application. It has the function of monitoring and detecting the lithium battery and promptly detecting the occurrence of the lithium battery thermal runaway. Once the lithium battery thermal runaway occurs, the lithium battery The characteristic physical quantities of thermal runaway, such as temperature, smoke, gas and radiant light intensity, are converted into electrical signals and immediately act to send an alarm signal to the fire alarm controller. In particular, thermal runaway deformation detectors play a vital role in early warning of fire, especially in areas where the human eye cannot directly observe them.
  • the currently available thermal runaway detectors only detect the temperature, gas and radiation intensity generated after the thermal runaway of the lithium battery, and cannot judge the early runaway of the lithium battery. And the temperature, gas and radiation intensity detectors are easily interfered by the environment, and the accuracy is not high. Especially when the lithium battery thermally loses control, it manifests itself in that the heating and vaporization of the internal electrolyte causes the lithium battery cell to expand and deform first, and then only the detectable gas escapes, then the ambient temperature rises, and then the heat Sparks caused by runaway.
  • the current gas detection and temperature detection methods can only give early warning to the middle stage of the thermal runaway of lithium batteries, but not early warning of early thermal runaway.
  • the present disclosure will provide a detection device for a lithium battery, which can detect and respond to an early thermal runaway of a lithium battery, such as providing an accurate alarm signal.
  • a detection device for a lithium battery includes a deformation detection structure, and the deformation detection structure includes a pressure sensing device, a signal line, and an external signal processor, wherein,
  • the pressure-sensitive device is connected to one end of the signal line, the other end of the signal line is connected to the external signal processor, and the pressure-sensitive device is installed between lithium battery cells or between the lithium battery cells and the lithium battery Between the outer frames of the monomer;
  • the lithium battery cell When the lithium battery cell thermally deforms out of control, the lithium battery cell presses the pressure-sensing device so that the pressure-sensing device senses pressure, and the pressure-sensing device passes the pressure signal generated by sensing the pressure through the signal line (3 ) To the external signal processor.
  • the pressure-sensitive device is a combination of any one or more of a touch switch, a piezoelectric sensor, and a pressure sensor.
  • the signal is an analog electrical signal
  • the external signal processor is configured to convert the analog electrical signal generated by the piezoelectric sensor into electrical Digital signal.
  • the signal is an electrical switch signal.
  • the pressure-sensitive device is provided with a protective casing, the pressure-sensitive device includes a detector unit, an integrated board of the detector unit, and a detector contact panel, wherein,
  • the number of the detector units is at least one, one side of the detector unit is fixed on one side of the integrated board of the detector unit, and the detector contact panel is fixed on the other side of the detector unit, The other side of the integrated board of the detector unit is fixed on the protective shell;
  • the detector contact panel is joined with a lithium battery cell
  • the protective casing is joined with another lithium battery cell or the outer frame of the lithium battery cell.
  • the pressure sensing device is provided with a protective casing, the pressure sensing device includes a detector unit and a detector unit integrated board, wherein,
  • the number of the detector units is at least one.
  • One side of the detector unit is fixed on one side of the detector unit integrated board, and the other side of the detector unit integrated board is fixed in the protective case.
  • the other side of the detector unit is joined with a lithium battery cell, and the protective casing is joined with another lithium battery cell or an outer frame of the lithium battery cell.
  • the joining refers to: fixed connection, or contact.
  • the contact switch is a micro switch or a membrane switch.
  • the piezoelectric sensor is a piezoelectric ceramic or a piezoelectric resistor or a piezoelectric power generation sheet.
  • the detection device of the lithium battery of the present disclosure includes a pressure-sensitive device, a protective case, a signal line and other components, and other auxiliary components such as a resistor, wherein the pressure-sensitive device and the signal line are necessary, and the protective circuit board and the circuit board used for the resistor and fixed resistance It plays an auxiliary role, depending on the specific use environment and use situation. When in use, it is installed between the battery cell or the battery cell and its outer frame, wherein the force-bearing surface is in direct contact with or very close to the side surface of the battery cell.
  • the pressure sensing device can be a contact switch, a piezoelectric sensor, or a pressure sensor. The three can be used alone or in combination.
  • the disconnected circuit can be connected, or it can be disconnected after being stressed.
  • the specific use is determined by the requirements of the external signal processor.
  • the external signal processor can also be connected to the alarm The device, when the control circuit is disconnected, controls the alarm device to alarm and promptly inform the user that the battery is faulty.
  • the detector of the lithium ion battery of the present disclosure fills the technical gap in the detection of thermal runaway deformation of the lithium battery, and solves the early warning problem of thermal runaway of the lithium ion battery well.
  • the thermal runaway of the lithium battery can be detected by the pressure sensing device, and according to the warning of the thermal runaway deformation detector, corresponding measures can be made to reduce the threat of life and property in a timely manner.
  • FIG. 1 is a schematic structural diagram of a lithium battery detection device of the present disclosure
  • FIG. 2 is a schematic structural diagram of the pressure-sensing device of the present disclosure.
  • deformation detection structure deformation detection structure 1, pressure sensing device 2, detector unit 21, detector unit integrated board 22, detector contact panel 23, signal line 3, and protective casing 4.
  • a detection device for a lithium battery includes a deformation detection structure 1.
  • the deformation detection structure 1 includes a pressure sensing device 2, a signal line 3 and an external signal processor.
  • the pressure sensing device 2 is connected to one end of the signal line 3 ,
  • the other end of the signal line 3 is connected to an external signal processor, and the pressure sensing device 2 is installed between the lithium battery cells or the lithium battery cell side, for example, one side is a lithium battery cell and the other side is a lithium battery cell
  • the lithium battery cell presses the pressure-sensitive device 2 so that the pressure-sensitive device 2 senses pressure, and the pressure-sensitive device 2 can pass the signal generated by the pressure sensing through the signal line 3 Pass to external signal processor.
  • a detection device for a lithium battery includes a deformation detection structure 1, and the deformation detection structure 1 includes a pressure-sensitive device 2, which is installed between lithium battery cells or on the side of the lithium battery cells.
  • the deformation detection structure 1 includes a pressure-sensitive device 2, which is installed between lithium battery cells or on the side of the lithium battery cells.
  • one side is a lithium battery cell and the other side is a lithium battery cell frame or other device.
  • the lithium battery cell thermally deforms out of control, the lithium battery cell presses the pressure-sensitive device 2 so that the pressure-sensitive device 2 senses pressure In this way, the pressure-sensing device 2 can transmit signals generated by sensing pressure.
  • the deformation detection structure of the present disclosure may or may not include the signal line and the external signal processor.
  • the pressure-sensing device 2 is a piezoelectric ceramic, a piezoresistor, or a piezoelectric power generation chip, which needs to convert an analog electrical signal into an electrical binary signal
  • an external signal processor needs to be used to convert the analog electrical signal into an electrical binary signal .
  • the role of the external signal processor is to provide a basis for an external alarm or the judgment of the entire battery system or the protection system, rather than directly switching on and off the battery cell power supply circuit.
  • a signal line and an external signal processor may not be required, and the deformation detection structure 1 of the present disclosure is actually an alarm circuit A switch, when the amount of deformation of the lithium battery reaches a certain level, this switch is closed, an alarm loop is formed, so that an external digital signal processor is given an electrical switching signal to notify the external signal processor that the lithium battery has thermal runaway.
  • the deformation detection structure 1 may be powered by a lithium battery or provided with a dedicated power source.
  • the pressure-sensitive device 2 is a contact switch, a piezoelectric sensor, or a pressure sensor, and the three may be used alone or in combination of at least two.
  • the three sensors: contact switch, piezoelectric sensor, and pressure sensor can be used alone or in parallel with multiple monomers of the same type.
  • a single unit can send signals That is, the judgment condition may be reached after a plurality of monomers send signals.
  • the pressure sensor After receiving external pressure, the pressure sensor can output analog electrical signals or pulse electrical signals or electrical switching signals to the outside.
  • the pressure-sensitive device 2 is provided with a protective casing 4.
  • the pressure-sensitive device 2 includes a detector unit 21, a detector unit integrated board 22 and a detector contact panel 23.
  • the number of the detector units 21 is At least one, one side of the detector unit 21 is fixed on one side of the detector unit integrated board 22, the other side of the detector unit 21 is fixed with a detector contact panel 23, the detector unit integrated board 22 is fixed in the protective case 4, the signal
  • the wire 3 extends out of the protective casing 4 and the detector contact panel 23 is joined to the lithium battery cell, which may be fixed together with the lithium battery cell, or in contact with the lithium battery cell, or clearance fit with the lithium battery cell
  • the protective case 4 and another lithium battery cell or a lithium battery cell outer frame may be joined in any of the above-mentioned manners.
  • the pressure-sensitive device 2 is provided with a protective casing 4.
  • the pressure-sensitive device 2 includes a detector unit 21 and a detector unit integrated board 22.
  • the number of the detector unit 21 is at least one, and the detector unit One side of 21 is fixed on one side of the detector unit integrated board 22, the detector unit integrated board 22 is fixed in the protective case 4, and the other side of the detector unit 21 is joined to the lithium battery cell, which may be specifically fixed to the lithium battery cell Together, or in contact with the lithium battery cell, or in clearance fit with the lithium battery cell, the protective casing 4 is fixedly connected or in contact with another lithium battery cell or the outer frame of the lithium battery cell.
  • the external signal processor controls the power supply circuit connected to the lithium battery cell.
  • the external signal processor is connected with a contact switch, and the contact switch is connected to the power supply circuit of the lithium battery cell.
  • the external signal processor turns on and off the power supply circuit of the lithium battery cell through the contact switch. Switch or membrane switch.
  • the piezoelectric sensor is a piezoelectric ceramic or a piezoelectric power generation sheet.
  • At least one detector unit 21 is fixed on the detector unit integrated board 22 of the present disclosure, the signal transmission line or the signal line 3 is connected to the detector unit integrated board 22, and the detector unit integrated board 22 If necessary, other auxiliary components can be integrated.
  • the pressure-sensitive device 2 may be a contact switch or a piezoelectric sensor or a pressure sensor.
  • the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the fixed frame.
  • the lithium battery undergoes thermal runaway deformation, the deformation of the lithium battery
  • the squeezing force acts on the detector body, thus opening or disconnecting the circuit connected to the detector, thereby generating a signal for the control element to judge.
  • One or more piezoelectric sensors are integrated as the detector body, and the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the fixed frame.
  • the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the fixed frame.
  • One or more pressure sensors are used as the detector body, and the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the fixed frame.
  • the lithium battery undergoes thermal runaway deformation, the lithium battery deforms and squeezes.
  • the force acts on the detector body, and the pressure sensor outputs different current and voltage signals according to the different squeezing forces to provide a basis for judgment.
  • the pressure sensing device 2 is installed between the lithium battery cell or the lithium battery cell and the fixed frame.
  • the lithium battery thermally deforms and generates squeezing force
  • the corresponding switch signal, voltage signal and current signal are output to provide judgment basis.
  • one side of the detector contact panel 23 is in surface contact with the lithium battery unit, and the other side is in contact with the detector unit 21 on the detector unit integrated board 22.
  • the detector contact panel 23 deforms the lithium battery thermally out of control
  • the squeezing force is transmitted to the detector unit 21, and after being collected by the detector unit integrated board 22, the voltage or current signal is transmitted through the signal transmission line 3 to connect with the outside world for information connection.
  • the detector unit or the integrated board of the detector unit is triggered to send out a signal through the signal line 3.
  • the detector contact panel 23 may not be used, and the pressure receiving surface of the detector unit 21 may be directly in contact with the lithium battery unit to directly apply a force to the detector unit 21.
  • the present disclosure provides a lithium battery thermal runaway deformation detection device, including a deformation detection structure 1, the deformation detection structure 1 includes a pressure sensing device 2, a signal line 3 and an external signal processor, the pressure sensing device 2 and one end of the signal line 3 Connection, the other end of the signal line 3 is connected to an external signal processor, the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the outer frame, when the lithium battery cells are out of control and deformed, lithium The battery cell presses the pressure sensing device 2 so that the pressure sensing device 2 senses the pressure, and the pressure sensing device 2 can transmit the pressure signal to the external signal processor through the signal line 3.
  • the deformation detection structure 1 includes a pressure sensing device 2, a signal line 3 and an external signal processor, the pressure sensing device 2 and one end of the signal line 3 Connection, the other end of the signal line 3 is connected to an external signal processor, the pressure-sensitive device 2 is installed between the lithium battery cells or between the lithium battery cells and the outer frame, when the lithium battery cells are
  • the pressure-sensitive device 2 is a contact switch, a piezoelectric sensor, or a pressure sensor, and the three are used alone or in combination of at least two.
  • the pressure-sensitive device 2 is provided with a protective shell 4 outside.
  • the pressure-sensitive device 2 includes a detector unit 21, a detector unit integrated board 22, and a detector contact panel 23.
  • the number of the detector unit 21 is at least one, the detector unit 21 side is fixed on one side of the detector unit integrated board 22, the detector contact panel 23 is fixed on the other side of the detector unit 21, and the detector unit integrated board 22 is fixed on
  • the protective case 4 the detector contact panel 23 extends out of the protective case 4, the detector contact panel 23 is fixed or in contact or clearance fit with the lithium battery cell, and the protective case 4 is connected with another lithium battery cell or lithium
  • the battery cell outer frame is fixedly connected.
  • the pressure sensing device 2 is provided with a protective casing 4 outside.
  • the pressure sensing device 2 includes a detector unit 21 and a detector unit integrated board 22.
  • the number of the detector units 21 is At least one, the detector unit 21 side is fixed on one side of the detector unit integrated board 22, the detector unit integrated board 22 is fixed in the protective case 4, the other side of the detector unit 21 extends out of the protective case 4, and the lithium
  • the battery cell is fixed or in contact or gap fit, and the protective casing 4 is fixedly connected to another lithium battery cell or a lithium battery cell outer frame.
  • the external signal processor controls the power supply circuit connected to the lithium battery cell.
  • the external signal processor is connected with a contact switch, the contact switch is connected to the power supply circuit of the lithium battery cell, and the external signal processor turns on and off the power supply circuit of the lithium battery cell through the contact switch.
  • the contact switch micro switch or membrane switch.
  • the piezoelectric sensor is a piezoelectric ceramic or a piezoelectric power generation sheet.

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Abstract

一种锂电池的探测装置，装置包括变形探测结构（1），变形探测结构（1）包括压感装置（2）、信号线（3）以及外部信号处理器，其中，压感装置（2）与信号线（3）的一端连接，信号线（3）的另一端连接外部信号处理器，压感装置（2）安装在锂电池单体之间或者锂电池单体与锂电池单体的外框之间；当锂电池单体热失控变形，锂电池单体压迫压感装置（2），使得压感装置（2）感应到压力，压感装置（2）将感应压力而产生的压力信号通过信号线（3）传递至外部信号处理器。

Description

一种锂电池的探测装置 技术领域
本公开涉及锂电池探测的技术领域，具体涉及锂电池的探测装置。
背景技术
锂电池热失控探测器在锂电池消防应用中是必不可少的一部分，它具有对锂电池进行监测，探测，及时发现锂电池热失控的发生，一旦锂电池发生了热失控，就将锂电池热失控的特征物理量，如温度、烟雾、气体和辐射光强等转换成电信号，并立即动作向火灾报警控制器发送报警信号。尤其是热失控变形探测器在火灾早期预警中起着至关重要的作用，特别是在人眼无法直接观测到的区域内，探测器尤为重要。
但是目前市面上可供选择的热失控探测器仅只针对锂电池热失控后产生的温度、气体和辐射光强等信息进行探测，而无法对锂电池热失控的早期做出判断。且温度、气体和辐射光强探测器容易被环境所干扰，准确率不高。尤其是当锂电池发生热失控后，其体现是内部电解液的发热汽化导致锂电池单体先发生膨胀变形，然后才有可探测气体的逸出，再之后为环境温度上升，之后才是热失控导致的火花产生。目前的气体探测及温度探测方式都只能对锂电池发生热失控的中期阶段做出预警，而无法对早期热失控做出预警。
发明概述
以下是对本公开详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本公开将提供一种锂电池的探测装置，该装置能检测到锂电池早期热失控并对此做出反应，如提供准确报警信号。
为实现上述技术目的，本公开采取的技术方案为：
一种锂电池的探测装置，包括变形探测结构，所述变形探测结构包括压感装置、信号线以及外部信号处理器，其中，
所述压感装置与所述信号线的一端连接，所述信号线的另一端连接所述外部信号处理器，所述压感装置安装在锂电池单体之间或者锂电池单体与锂电池单体的外框之间；
当锂电池单体热失控变形，锂电池单体压迫所述压感装置，使得所述压感装置感应到压力，所述压感装置将感应压力而产生的压力信号通过所述信号线(3)传递至所述外部信号处理器。
在一示例性的实施方式中，所述压感装置为接触开关、压电传感器和压力传感器中的任意一个或多个的组合。
在一示例性的实施方式中，当所述压感装置包括压电传感器时，所述信号为模拟电信号，所述外部信号处理器设置成：将压电传感器产生的模拟电信号转换成电开关量信号。
在一示例性的实施方式中，当所述压感装置包括接触开关时，所述信号为电开关量信号。
在一示例性的实施方式中，所述压感装置外设有保护外壳，所述压感装置包括探测器单元、探测器单元集成板和探测器接触面板，其中，
所述探测器单元的数量为至少一个，所述探测器单元的一侧固定在所述探测器单元集成板的一侧，所述探测器单元的另一侧固定有所述探测器接触面板，所述探测器单元集成板的另一侧固定在所述保护外壳上；
所述探测器接触面板与锂电池单体接合，所述保护外壳与另一个锂电池单体或锂电池单体的外框接合。
在一示例性的实施方式中，所述压感装置外设有保护外壳，所述压感装置包括探测器单元和探测器单元集成板，其中，
所述探测器单元的数量为至少一个，所述探测器单元的一侧固定在所述探测器单元集成板的一侧，所述探测器单元集成板的另一侧固定在保护外壳中，所述探测器单元另一侧与锂电池单体接合，所述保护外壳与另一个锂电池单体或锂电池单体的外框接合。
在一示例性的实施方式中，所述接合是指：固定连接，或者接触。
在一示例性的实施方式中，所述接触开关为微动开关或薄膜开关。
在一示例性的实施方式中，所述压电传感器为压电陶瓷或压电电阻或压电发电片。
本公开的锂电池的探测装置，包括压感装置、保护外壳、信号线等元件及电阻等其他辅助元件，其中压感装置及信号线是必须的，保护外壳及电阻及固定电阻所用的电路板起辅助作用，视具体的使用环境及使用情况而选择。在使用时，安装于与电池单体之间或者电池单体与其外框之间，其中受力面与电池单体侧面直接接触或非常接近。压感装置作为检测核心，可以是接触开关，也可以是压电传感器，也可以是压力传感器，三者可以单独使用，也可以组合使用。一旦压感装置受到压力后，即可将断开电路连通，也可以是受到压力后，将原本连通的电路断开，具体使用由外部信号处理器的要求决定，外部信号处理器还可以连接报警装置，在控制电路断开的同时，控制报警装置报警，及时告知使用者电池出现故障。
本公开的锂离子电池的探测器填补了锂电池热失控变形探测的技术空白，很好的解决了锂离子电池发生热失控的早期预警问题，当锂电池单体先发生膨胀变形尚未有气体泄漏时，就能通过压感装置检测到锂电池热失控，根据热失控变形探测器的预警，做出相应的措施，及时降低生命财产受到的威胁程度。
附图概述
附图用来提供对本公开技术方案的进一步理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本公开的技术方案，并不构成对本公开技术方案的限制。
图1是本公开的锂电池的探测装置的结构示意图；
图2是本公开的压感装置的结构示意图。
其中的附图标记为：变形探测结构1、压感装置2、探测器单元21、探测器单元集成板22、探测器接触面板23、信号线3、保护外壳4。
详述
下面参照附图描述本公开的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本公开，而不用于穷举本公开的所有可行的方式，也不用于限制本公开的范围。
以下结合附图对本公开的实施例作进一步详细描述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
锂电池的探测装置，如图1所示，该装置包括变形探测结构1，变形探测结构1包括压感装置2、信号线3以及外部信号处理器，压感装置2与信号线3的一端连接，信号线3的另一端连接外部信号处理器，压感装置2安装在锂电池单体之间或者锂电池单体一侧，例如一侧为锂电池单体，另一侧为锂电池单体外框或者其他装置，当锂电池单体热失控变形，锂电池单体压迫压感装置2，使得压感装置2感应到压力，压感装置2能将感应压力而产生的信号通过信号线3传递至外部信号处理器。
锂电池的探测装置，如图1所示，该装置包括变形探测结构1，变形探测结构1包括压感装置2，压感装置2安装在锂电池单体之间或者锂电池单体一侧，例如一侧为锂电池单体，另一侧为锂电池单体外框或者其他装置，当锂电池单体热失控变形，锂电池单体压迫压感装置2，使得压感装置2感应到压力，压感装置2能将感应压力而产生的信号传递出去。
也就是说，本公开的变形探测结构可以包括信号线和外部信号处理器，也可以不包括信号线和外部信号处理器。当压感装置2为压电陶瓷或压电电阻或压电发电片这些需要将模拟电信号转换成电开关量信号的情况下，需要通过外部信号处理器将模拟电信号转换成电开关量信号。
在一示例性的实施方式中，外部信号处理器的作用是给外部警报或者整个电池系统或者保护系统的判断提供依据，而不是直接通断电池单体供电回路。
在一示例性的实施方式中，也就是当压感装置2为接触开关或者其他开关的情况下，可以不需要信号线和外部信号处理器，本公开的变形探测结构1实际就是一报警回路里的一个开关，当锂电池的变形量达到一定程度时，此开关闭合，报警回路形成，如此就给外部信号处理器一个电开关量信号，通知外部信号处理器，锂电池发生热失控了。
在一示例性的实施方式中，变形探测结构1可以由锂电池供电，或者设置有专门的电源。
在一示例性的实施方式中，压感装置2为接触开关或压电传感器或压力传感器，三者可单独使用或至少两种组合使用。接触开关、压电传感器、压力传感器这三种传感器可以其中任何单独一种单个使用，也可以多个同一种单体并联使用，根据使用场合不同，根据一定的算法，可以是一个单体发出信号即可判断，也可以是多个单体发出信号后达成判断条件。压力传感器在受到外部压力后，可向外部输出模拟电信号或脉冲电信号或电开关量信号。
在一示例性的实施方式中，压感装置2外设有保护外壳4，压感装置2包括探测器单元21、探测器单元集成板22和探测器接触面板23，探测器单元21的数量为至少一个，探测器单元21一侧固定在探测器单元集成板22的一面，探测器单元21的另一侧固定有探测器接触面板23，探测器单元集成板22固定在保护外壳4中，信号线3伸出至保护外壳4外，探测器接触面板23与锂电池单体接合，具体可以是与锂电池单体固定在一起，或与锂电池单体接触，或与锂电池单体间隙配合，保护外壳4与另一个锂电池单体或锂电池单体外框也可以以上述方式中的任一种方式接合。
在一示例性的实施方式中，压感装置2外设有保护外壳4，压感装置2包括探测器单元21和探测器单元集成板22，探测器单元21的数量为至少一个，探测器单元21一侧固定在探测器单元集成板22的一面，探测器单元集成板22固定在保护外壳4中，探测器单元21另一侧与锂电池单体接合，具体可以是与锂电池单体固定在一起，或与锂电池单体接触，或与锂电池单体间隙配合，保护外壳4与另一个锂电池单体或锂电池单体外框固定连接或接触。
在一示例性的实施方式中，外部信号处理器控制连接锂电池单体的供电回路。
在一示例性的实施方式中，外部信号处理器连接有接触开关，接触开关接入锂电池单体的供电回路，外部信号处理器通过接触开关通断锂电池单体的供电回路，接触开关微动开关或薄膜开关。
在一示例性的实施方式中，压电传感器为压电陶瓷或压电发电片。
在一示例性的实施方式中，本公开的探测器单元集成板22上固定有至少一个探测器单元21，信号传输线或者说信号线3连接在探测器单元集成板22上，探测器单元集成板22视需要可集成其他辅助元件。压感装置2可以是接触开关或压电传感器或压力传感器。
若采用一个或多个接触开关集成为探测器主体，压感装置2安装于锂电池单体之间或锂电池单体与固定框架之间，当锂电池发生热失控变形时，锂电池变形产生的挤压力作用于探测器主体，因而打开或断开与探测器相连接的电路，从而产生信号供控制元件进行判断依据。
采用一个或多个压电传感器集成为探测器主体，压感装置2安装于锂电池单体之间或锂电池单体与固定框架之间，当锂电池发生热失控变形时，锂电池变形产生的挤压力作用于探测器主体，压电传感器产生压电效应，对应不同的挤压力产生不同的电压，对外输出以提供判断依据。
采用一个或多个压力传感器为探测器主体，压感装置2安装于锂电池单体之间或锂电池单体与固定框架之间，当锂电池发生热失控变形时，锂电池变形产生的挤压力作用于探测器主体，压力传感器根据挤压力的不同输出不同的电流、电压信号以提供判断依据。
采用一个或多个接触开关、压电传感器、压力传感器混合组合，压感装置2安装于锂电池单体或锂电池单体与固定框架之间，当锂电池发生热失控变形产生挤压力时，对外输出相应的开关量信号、电压信号、电流信号以提供判断依据。
本施例中，探测器接触面板23一侧与锂电池单元面接触，另一侧与探测器单元集成板22上的探测器单元21接触，由探测器接触面板23将锂电池热失控变形的挤压力传递给探测器单元21，经过探测器单元集成板22的收集后通过信号传输线3将电压或电流信号传出与外界进行信息联接。或者说，当锂电池热失控造成的变形达到预先设定值时，触发探测器单元或探测器单元集成板通过信号线3向外发出信号。另外，也可不采用探测器接触面板23，直接以探测器单元21压力接收面与锂电池单元接触，直接将力作用于探测器单元21。
本公开提供了锂电池热失控变形探测装置，包括变形探测结构1，所述 的变形探测结构1包括压感装置2、信号线3以及外部信号处理器，压感装置2与信号线3的一端连接，信号线3的另一端连接外部信号处理器，所述的压感装置2安装在锂电池单体之间或者锂电池单体与其外框之间，当锂电池单体热失控变形，锂电池单体压迫压感装置2，使得压迫压感装置2感应到压力，所述的压感装置2能将压力信号通过信号线3传递至外部信号处理器。
在一示例性的实施方式中，所述的压感装置2为接触开关或压电传感器或压力传感器，三者单独使用或至少两种组合使用。
在一示例性的实施方式中，所述的压感装置2外设有保护外壳4，压感装置2包括探测器单元21、探测器单元集成板22和探测器接触面板23，所述的探测器单元21的数量为至少一个，探测器单元21一侧固定在探测器单元集成板22的一面，探测器接触面板23固定在探测器单元21的另一侧，探测器单元集成板22固定在保护外壳4中，探测器接触面板23伸出至保护外壳4外，所述的探测器接触面板23与锂电池单体固定或接触或间隙配合，保护外壳4与另一个锂电池单体或锂电池单体外框固定连接。
在一示例性的实施方式中，所述的压感装置2外设有保护外壳4，压感装置2包括探测器单元21和探测器单元集成板22，所述的探测器单元21的数量为至少一个，探测器单元21一侧固定在探测器单元集成板22的一面，探测器单元集成板22固定在保护外壳4中，探测器单元21另一侧伸出至保护外壳4外，与锂电池单体固定或接触或间隙配合，保护外壳4与另一个锂电池单体或锂电池单体外框固定连接。
在一示例性的实施方式中，所述的外部信号处理器控制连接锂电池单体的供电回路。
在一示例性的实施方式中，所述的外部信号处理器连接有接触开关，接触开关接入锂电池单体的供电回路，外部信号处理器通过接触开关通断锂电池单体的供电回路，所述的接触开关微动开关或薄膜开关。
在一示例性的实施方式中，所述的压电传感器为压电陶瓷或压电发电片。
以上仅是本公开的优选实施方式，本公开的保护范围并不仅局限于上述 实施例，凡属于本公开思路下的技术方案均属于本公开的保护范围。应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理前提下的若干改进和润饰，应视为本公开的保护范围。

Claims (10)

  1. 一种锂电池的探测装置，包括变形探测结构(1)，所述变形探测结构(1)包括压感装置(2)、信号线(3)以及外部信号处理器，其中，
    所述压感装置(2)与所述信号线(3)的一端连接，所述信号线(3)的另一端连接所述外部信号处理器，所述压感装置(2)安装在锂电池单体之间或者锂电池单体与锂电池单体的外框之间；
    当锂电池单体热失控变形，锂电池单体压迫所述压感装置(2)，使得所述压感装置(2)感应到压力，所述压感装置(2)将感应压力而产生的信号通过所述信号线(3)传递至所述外部信号处理器。
  2. 根据权利要求1所述的探测装置，其中，所述压感装置(2)为接触开关、压电传感器和压力传感器中的任意一个或多个的组合。
  3. 根据权利要求2所述的探测装置，其中，当所述压感装置(2)包括压电传感器时，所述信号为模拟电信号，所述外部信号处理器设置成：将压电传感器产生的模拟电信号转换成电开关量信号。
  4. 根据权利要求2所述的探测装置，其中，当所述压感装置(2)包括接触开关时，所述信号为电开关量信号。
  5. 根据权利要求1-4中任一项所述的探测装置，其中，所述压感装置(2)外设有保护外壳(4)，所述压感装置(2)包括探测器单元(21)、探测器单元集成板(22)和探测器接触面板(23)，其中，
    所述探测器单元(21)的数量为至少一个，所述探测器单元(21)的一侧固定在所述探测器单元集成板(22)的一侧，所述探测器单元(21)的另一侧固定有所述探测器接触面板(23)，所述探测器单元集成板(22)的另一侧固定在所述保护外壳(4)上；
    所述探测器接触面板(23)与锂电池单体接合，所述保护外壳(4)与另一个锂电池单体或锂电池单体的外框接合。
  6. 根据权利要求1-4中任一项所述的探测装置，其中，所述压感装置(2)外设有保护外壳(4)，所述压感装置(2)包括探测器单元(21)和探测器单元集成板(22)，其中，
    所述探测器单元(21)的数量为至少一个，所述探测器单元(21)的一侧固定在所述探测器单元集成板(22)的一侧，所述探测器单元集成板(22)的另一侧固定在保护外壳(4)中，所述探测器单元(21)另一侧与锂电池单体接合，所述保护外壳(4)与另一个锂电池单体或锂电池单体的外框接合。
  7. 根据权利要求5所述的探测装置，其中，所述接合是指：固定连接，或者接触。
  8. 根据权利要求6所述的探测装置，其中，所述接合是指：固定连接，或者接触。
  9. 根据权利要求2-4中任一项所述的探测装置，其中，所述接触开关为微动开关或薄膜开关。
  10. 根据权利要求2-4中任一项所述的探测装置，其中，所述压电传感器为压电陶瓷或压电电阻或压电发电片。
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CN107607872A (zh) * 2016-07-12 2018-01-19 中兴通讯股份有限公司 一种电池检测设备、电池检测方法和装置
CN108574775A (zh) * 2017-03-10 2018-09-25 三星电子株式会社 检测电池的膨胀的方法以及使用该方法的电子设备
CN207832363U (zh) * 2017-11-30 2018-09-07 合肥国轩高科动力能源有限公司 一种锂电池膨胀检测装置
CN108390111A (zh) * 2018-01-09 2018-08-10 上海忠舍工业安防设备有限公司 锂离子电池早期火灾预警系统
CN109540082A (zh) * 2018-11-26 2019-03-29 哲弗智能系统（上海）有限公司 锂电池热失控变形探测装置
CN209559178U (zh) * 2018-11-26 2019-10-29 哲弗智能系统（上海）有限公司 锂电池热失控变形探测装置

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