WO2024027373A1 - 一种柔性线路板测试系统 - Google Patents

一种柔性线路板测试系统 Download PDF

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Publication number
WO2024027373A1
WO2024027373A1 PCT/CN2023/102748 CN2023102748W WO2024027373A1 WO 2024027373 A1 WO2024027373 A1 WO 2024027373A1 CN 2023102748 W CN2023102748 W CN 2023102748W WO 2024027373 A1 WO2024027373 A1 WO 2024027373A1
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Prior art keywords
voltage
module
test
temperature
fpc
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PCT/CN2023/102748
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English (en)
French (fr)
Inventor
王超立
滕国鹏
陈麒米
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江苏时代新能源科技有限公司
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Publication of WO2024027373A1 publication Critical patent/WO2024027373A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer

Definitions

  • This application relates to the field of battery technology, and specifically to a flexible circuit board testing system.
  • the batteries used in new energy vehicles are mainly multi-module structures and contain a large number of cells.
  • each cell needs to be monitored (such as temperature and voltage), and the cells need to be connected to the monitoring unit. .
  • the main implementation method is to use FPC (Flexible Printed Circuit, flexible circuit board) wire harness to realize the connection between the battery core and the monitoring unit.
  • FPC Flexible Printed Circuit, flexible circuit board
  • FPC has many advantages, it also has some shortcomings, such as poor structural strength and easy damage. Therefore, if Failure to effectively identify FPC anomalies will result in direct scrapping of the product and batch anomalies.
  • this application provides a flexible circuit board testing system to achieve performance testing of the flexible circuit board without causing damage to the flexible circuit board.
  • this application provides a flexible circuit board testing system, including: an environmental platform, a voltage simulation module, a test sampling module, and a host computer;
  • the environmental platform includes a temperature adjustment module and a plurality of connection buckles, and the temperature
  • the adjustment module is used to provide the ambient temperature for the flexible circuit board under test, and the connection buckle is used to electrically connect with the voltage point of the flexible circuit board under test;
  • the voltage simulation module includes a voltage source and a voltage dividing module, and the voltage dividing module
  • the voltage module is electrically connected to the voltage source, and has a plurality of branches for outputting the divided voltage, and each of the branches is electrically connected to one of the connection snaps;
  • the test sampling module includes a temperature sampling module and a voltage sampling module, the temperature sampling module is electrically connected to the first terminal of the tested flexible circuit board, the voltage sampling module is electrically connected to the second terminal of the measured flexible circuit board;
  • the host computer connected to the test sampling module.
  • connection buckle of the environmental platform can ensure that each voltage point on the FPC under test is stably connected to the corresponding branch, while protecting the appearance integrity of the FPC under test and ensuring that the FPC under test is properly connected during the test.
  • the FPC is not damaged and provides a temperature environment for the FPC under test through the temperature adjustment module of the environment platform.
  • Multiple voltage signal outputs are realized through the multiple branches provided by the voltage dividing module of the voltage simulation module to provide each voltage point of the FPC under test.
  • the machine saves records to facilitate traceability and query while testing the voltage sampling performance and temperature sampling performance of the FPC under test.
  • the implementation cost of this patented solution is relatively low, and the test can be implemented after placing the FPC under test on the environmental platform, and the operation is relatively convenient.
  • the voltage dividing module includes a plurality of voltage dividing resistors connected in series; wherein, two ends of the multiple voltage dividing resistors connected in series are respectively connected to a branch, and each adjacent two voltage dividing resistors are connected to a branch. Connected by a branch road.
  • the voltage source voltage is divided, so that a voltage dividing branch can be drawn at both ends of each voltage dividing resistor to provide various voltage points of the FPC under test. Provide corresponding voltage dividing signal.
  • the size of the voltage dividing resistor can also be adjusted.
  • switches and fuses are provided in each branch, wherein the fusing condition of the fuse line is smaller than the fusing condition of the voltage point on the FPC under test.
  • the environmental platform further includes a humidity adjustment module, which is used to provide environmental humidity for the flexible circuit board under test.
  • a humidity adjustment module which is used to provide environmental humidity for the flexible circuit board under test.
  • the environmental platform further includes a standard thermistor; the standard thermistor is electrically connected to the temperature sampling module. Since the FPC itself is equipped with a thermistor for sensing the temperature of the battery core, by setting a standard thermistor on the environmental platform, the temperature sensed by the standard thermistor 202 in the same environment can be the same as the temperature inside the measured FPC 201. Compare the temperature sensed by the sensitive resistor, thereby achieving the test of the thermistor inside the FPC under test.
  • the specifications of the standard thermistor are the same as the specifications of the thermistor provided in the flexible circuit board under test. Test accuracy can be improved by aligning the thermistor specifications in the environmental platform with those in the FPC under test.
  • the environmental platform further includes a controller; the controller is electrically connected to the temperature adjustment module and the humidity adjustment module respectively.
  • the controller is electrically connected to the temperature adjustment module and the humidity adjustment module respectively.
  • the temperature sampling module has multiple temperature sampling channels. By setting up multiple sampling channels in the temperature sampling module, the temperature sampling performance test of each thermistor inside the FPC can be realized.
  • the voltage sampling module has multiple voltage sampling channels. By setting up multiple sampling channels in the voltage sampling module, the voltage sampling performance test of each voltage point of the FPC under test can be realized.
  • the environmental platform includes a stand for fixing the flexible circuit board under test.
  • a stand for fixing the flexible circuit board under test By using a bench to fix the FPC under test, you can prevent the FPC under test from moving or being damaged during the test.
  • Figure 1 shows one of the schematic structural diagrams of a flexible circuit board testing system according to some embodiments of the present application
  • Figure 2 shows the second structural schematic diagram of a flexible circuit board testing system according to some embodiments of the present application
  • FIG. 3 shows a schematic structural diagram of a temperature sampling module according to some embodiments of the present application.
  • Figure 4 shows a schematic structural diagram of a voltage sampling module according to some embodiments of the present application.
  • Flexible circuit board testing system 100 voltage simulation module 10, environment platform 20, test sampling module 30, and host computer 40;
  • Voltage source 101 voltage dividing module 102, voltage dividing resistors R1 ⁇ Rn, fuses F0 ⁇ Fn, switches S0 ⁇ Sn, buckles K0 ⁇ Kn, tested FPC201, standard thermistor 202, temperature adjustment module 203, controller 204 , bench 205, humidity adjustment module 206, temperature sampling module 301, voltage sampling module 302;
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • New energy batteries used in some electrical equipment usually adopt a module structure, which contains a large number of cells. To ensure battery performance, each cell needs to be monitored.
  • FPC is used to realize the connection between each cell and the monitoring unit in the module structure.
  • FPC has many technical advantages, such as low cost and simple structure, it also has shortcomings such as poor structural strength and easy damage. therefore It is necessary to test whether there are any abnormalities in the performance of the FPC.
  • the inventor's research found that the FPC that realizes the connection between the battery and the monitoring unit mainly plays the role of data transmission, such as transmitting the cell voltage and the ambient temperature of the cell. Therefore, a flexible circuit board testing system is designed to realize the FPC Testing of data transmission performance can effectively identify abnormal problems of FPC.
  • the flexible circuit board test system includes a voltage simulation module, an environmental platform, a test sampling module and a host computer.
  • the environmental platform is used to fix the FPC under test and provide a test environment for the FPC under test to ensure that there is no damage to the FPC during the test process.
  • the voltage signal is distributed to the FPC under test through the voltage simulation module to provide real usage scenario simulation for the FPC under test and improve test reliability and efficiency.
  • the test data of the FPC under test during the test process is collected through the test sampling module and uploaded to the host. Machine to realize the storage and recording of test data to facilitate traceability and query.
  • This patented solution has relatively low implementation cost, is easy to operate, and is applicable to various types of FPCs.
  • the flexible circuit board testing system disclosed in the embodiment of the present application can be, but is not limited to, used in the production process of batteries. Of course, it can also be used in the production process of other similar structures to implement performance testing of the FPC used in the production process to improve The reliability of FPC avoids batch anomalies caused by direct scrapping of products.
  • Figure 1 shows a schematic structural diagram of a flexible circuit board testing system 100 provided by an embodiment of the present application.
  • the flexible circuit board testing system 100 includes a voltage simulation module 10, an environmental platform 20. Test sampling module 30 and host computer 40. Each structure included in the flexible circuit board testing system 100 is described in detail below:
  • the environment platform 20 is used to fix the FPC201 under test and provide a test environment for the FPC201 under test. It is also used to stably transmit the voltage signal provided by the voltage simulation module 10 to the FPC201 under test. The voltage signal is then transmitted to the FPC201 under test through the FPC201 under test. Test sampling module 30.
  • the environment platform 20 includes a temperature adjustment module 203 and a plurality of connection buckles K0-Kn.
  • the temperature adjustment module 203 is used to provide the ambient temperature for the FPC 201 under test so that the FPC under test is in a controllable test environment.
  • the connection buckles K0-Kn are set at each voltage point V0 ⁇ Vn of the FPC 201 under test.
  • the environment platform 20 can be implemented using a high and low temperature chamber to prevent the FPC testing process from being affected by the external environment.
  • the voltage simulation module 10 is used to simulate the cell voltage, which includes a voltage source 101 and a voltage dividing module 102.
  • the voltage dividing module 102 is electrically connected to the voltage source 101, and the voltage source 101 is used to provide voltage for the voltage dividing module 102.
  • the voltage dividing module 102 has a plurality of branches L0 ⁇ Ln for outputting voltage dividing signals, and the branches L0 ⁇ Ln are electrically connected to the other ends of the connecting buckles K0 ⁇ Kn respectively.
  • each The branch can provide a voltage signal for a voltage point of the FPC201 under test to achieve the simulation effect of the cell voltage and realize the simulation of real usage scenarios.
  • connection buckle is usually composed of a positioning piece and a fastener.
  • the function of the positioning piece is to guide the connection buckle to reach the installation position smoothly, correctly and quickly during installation.
  • the function of the fastener is to lock and support the connection buckle. on the road, and ensure that it does not fall off during use. It can be seen from this that even Connecting the buckles K0 to Kn can ensure that the wiring harness at each voltage point on the FPC under test is stably connected to the corresponding branch while protecting the appearance integrity of the FPC under test.
  • the voltage source 101 can be a constant voltage source or a high voltage source.
  • the voltage source 101 can preferably be an adjustable single-channel constant voltage source with specifications of 0 to 100V, 5A. DC constant voltage source, voltage accuracy is less than 0.5%.
  • the number of voltage dividing signal branches of the voltage dividing module 102 can be set according to the maximum number of voltage points of the FPC used in actual applications, and the size of the voltage dividing signal output by each branch can be adjusted according to actual needs.
  • each voltage point of the FPC under test is connected to the branches of the voltage dividing module 102 in sequence, and the remaining branches can be left floating. Therefore, these branches L0 ⁇ Ln can be adapted to the testing of different types of FPCs.
  • the cells are assembled in series. Assuming that a module structure consists of 5 cells assembled in series, then an FPC with a series number of 5 strings needs to be selected, and the FPC needs to have 6 voltage points. bit to realize the transmission of voltage signals of 5 cells.
  • the number of voltage dividing signal branches of the voltage dividing module 102 is 10
  • the FPC has 6 voltage points, that is, the number of connectable cells is 5.
  • the 6 voltage points of the FPC The points are respectively connected to the first 6 branches of the voltage dividing module 102, and the remaining 4 branches are suspended.
  • the test sampling module 30 is used to sample the test process of the FPC 201 under test, and is electrically connected to the host computer 40.
  • the test sampling module 30 includes a temperature sampling module 301 and a voltage sampling module 302. Specifically, the temperature sampling module 301 is connected to the tested FPC 201. The first terminal of the measured FPC201 is electrically connected, the voltage sampling module 302 is electrically connected with the second terminal of the measured FPC201, the temperature sampling module 301 and the voltage sampling module 302 respectively upload the voltage sampling data and temperature sampling data of the measured FPC201 to The host computer 40 stores records to determine whether the performance of the FPC 201 under test is abnormal based on these data. Realize the test of the voltage sampling performance and temperature sampling performance of the FPC201 under test.
  • the FPC under test usually provides multi-way wiring terminals for connecting to the monitoring unit to transmit the cell voltage of each cell in the battery module to the monitoring unit.
  • the first wiring terminal is a multi-way wiring
  • the connection terminal belonging to the temperature channel among the terminals is used to transfer the temperature sensed by the thermistor inside the FPC under test to the temperature sampling module 301.
  • the second connection terminal is the connection terminal belonging to the voltage channel among the multi-channel connection terminals, which is used to transfer the temperature sensed by the thermistor inside the measured FPC to the temperature sampling module 301.
  • the voltage signals of each voltage point received by the FPC are transmitted to the voltage sampling module 302 .
  • the communication connection between the host computer 40 and the test sampling module 30 may be an RS485 communication method or a Can bus communication method, which is not specifically limited in this application.
  • the connection buckle of the environmental platform can ensure that each voltage point on the FPC under test is stably connected to the corresponding branch, while protecting the appearance integrity of the FPC under test and ensuring test There is no damage to the FPC during the process, and the temperature adjustment module of the environmental platform provides a temperature environment for the FPC under test.
  • the temperature adjustment module of the environmental platform provides a temperature environment for the FPC under test.
  • the records are saved by the host computer to facilitate traceability and query while testing the voltage sampling performance and temperature sampling performance of the FPC under test.
  • the implementation cost of this patented solution is relatively low, and the test can be implemented after placing the FPC under test on the environmental platform, and the operation is relatively convenient.
  • the voltage dividing module 102 includes a plurality of voltage dividing resistors R1 ⁇ Rn connected in series.
  • the two ends of these voltage dividing resistors are connected to a branch respectively, and a branch is connected between every two adjacent voltage dividing resistors, that is, the dividing One end of the voltage dividing resistor R1 is connected to the branch L0, the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected to the branch L1, the voltage dividing resistor R2 and the voltage dividing resistor R3 are connected to the branch L2, and so on. And by adjusting the size of the voltage dividing resistor, the size of the output voltage dividing signal can be changed.
  • the voltage dividing resistors R1 ⁇ Rn can use precision resistors to improve the accuracy of the voltage dividing signal.
  • a plurality of voltage dividing resistors R1 to Rn are connected in series to realize voltage division of the voltage source voltage, so that a voltage dividing branch can be drawn at both ends of each voltage dividing resistor to provide each voltage of the FPC 201 under test.
  • the voltage points V0 ⁇ Vn provide corresponding voltage dividing signals.
  • the size of the voltage dividing resistor can also be adjusted.
  • switches can be set on each branch, that is, a switch S0 is set on the branch L0, a switch S1 is set on the branch L1, and so on, a switch S1 is set on the branch Ln.
  • Set switch Sn a switch S0 is set on the branch L0, a switch S1 is set on the branch L1, and so on, a switch S1 is set on the branch Ln.
  • the switch set on each branch can control its opening or closing according to actual needs.
  • the branch When the branch is connected to a voltage point of the FPC201 under test, if the control switch is closed, the divided voltage signal output by the branch will be transmitted to the corresponding voltage point. If the control switch is open, the branch The output divided voltage signal will not be transmitted to the corresponding voltage point; when the branch is not connected to the voltage point of the measured FPC201, then if the control switch is disconnected, it can also block the external signal to the voltage simulation module 10. interference.
  • a fuse can be set on each branch, that is, a fuse F0 is set on the branch L0, a fuse F1 is set on the branch L1, and so on, and a fuse Fn is set on the branch Ln. It is worth noting that the fusing condition of the fuse on each branch is smaller than the fusing condition of the voltage point on the FPC under test.
  • the fuse on each branch can protect the object under test.
  • voltage fluctuations or large currents may occur, which may cause damage to the FPC under test.
  • the fuse's melting condition is lower than that of the FPC under test, so the fuse blows out before the FPC under test, preventing the FPC under test from being damaged during the test. , protect the performance integrity of the FPC under test.
  • the environment platform 20 may also include a stand 205 for fixing the FPC 201 under test.
  • the FPC under test can be prevented from moving or being damaged during the test.
  • the environment platform 20 further includes a humidity adjustment module 206 , which is used to provide environmental humidity for the FPC 201 under test.
  • a humidity adjustment module 206 which is used to provide environmental humidity for the FPC 201 under test.
  • a real humidity simulation environment can be provided for the FPC 201 under test to achieve the performance of the FPC. test.
  • the environmental platform 20 also includes a standard thermistor 202, which is electrically connected to the temperature sampling module 301.
  • the temperature collected by the standard thermistor 202 is used as the standard temperature of the environment where the measured FPC 201 is located. Since the FPC itself is equipped with a thermistor for sensing the temperature of the battery core, a standard thermistor is set on the environment platform 20 202, the temperature sensed by the standard thermistor 202 in the same environment can be compared with the temperature sensed by the internal thermistor of the FPC 201 under test, thereby achieving the test of the internal thermistor of the FPC under test.
  • the temperature sensed by the thermistor inside the FPC201 under test is significantly different from the temperature sensed by the standard thermistor 202, it means that there is an abnormality in the thermistor inside the FPC201 under test.
  • the specifications of the standard thermistor 202 need to be the same as the specifications of the thermistor set in the FPC 201 under test, so as to improve the accuracy of the test.
  • the environmental platform 20 may further include a controller 204 that is electrically connected to the temperature adjustment module 203 and the humidity adjustment module 206 respectively.
  • the controller 204 is used to control the ambient temperature and ambient humidity provided by the temperature adjustment module 203 and the humidity adjustment module 206.
  • the controller 204 can be implemented using a single-chip microcomputer CPU.
  • the controller 204 can be placed outside the environmental platform 20 .
  • variable control of the temperature and humidity environment provided by the environmental platform 20 can be automatically realized, which facilitates the aging performance test of the FPC.
  • the initial ambient temperature can be set to 85°C
  • the heating rate can be set to 5°C/min
  • the initial ambient humidity can be set to 85%
  • the holding time can be 48 hours
  • the voltage sampling of the FPC under test can be continuously monitored through the host computer 40 performance and temperature sampling performance, so that the aging performance of the tested FPC under high temperature and high humidity conditions can be verified.
  • the temperature sampling module 301 has multiple temperature sampling channels 1 to m+1.
  • each temperature sampling channel can realize the temperature sampling of a thermistor, and each temperature sampling channel is connected to both ends of the thermistor, where one end of the thermistor is positive “+” and the other end is negative “- ".
  • this application does not specifically limit the number of temperature sampling channels in the temperature sampling module 301, and the structure of each temperature sampling channel is the same. Specifically, a temperature sampling transmitter structure can be used.
  • thermistor in the FPC under test may be one or multiple, and this application does not specifically limit this.
  • the voltage sampling module 302 has multiple voltage sampling channels V0 ⁇ Vn.
  • each voltage sampling channel is used to realize the voltage sampling of a voltage point on the FPC under test, that is, the voltage sampling channel V0 is used to realize the voltage sampling of the voltage point V0 on the FPC under test, and the voltage sampling channel V1 is used to realize The voltage sampling of the voltage point V1 on the FPC under test, and so on.
  • each voltage sampling channel can be implemented using a voltage sampling A/D converter.

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  • General Physics & Mathematics (AREA)
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  • Tests Of Electronic Circuits (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

一种柔性线路板测试系统（100），包括电压模拟模块（10）、环境平台（20）、测试采样模块（30）、上位机（40）；环境平台（20）包括温度调节模块（203）和连接卡扣（K0，...，Kn），温度调节模块（203）为柔性电路板（201）提供环境温度，连接卡扣（K0，...，Kn）与柔性线路板（201）的电压点位电连接；电压模拟模块（10）包括互相连接的电压源（101）和分压模块（102），分压模块（102）有多条用于输出分压的支路，每条支路与一个连接卡扣电连接；测试采样模块（30）包括温度采样模块（301）和电压采样模块（302），温度采样模块（301）与柔性线路板（201）的第一接线端子电连接，电压采样模块（302）与第二接线端子电连接；上位机（40）与测试采样模块（30）连接。通过为FPC提供环境的环境平台（20）确保无损测试，通过电压模拟模块（10）分配电压信号给FPC以提供真实场景模拟，提高测试可靠性，通过上位机（40）记录测试数据便于追溯与查询。

Description

一种柔性线路板测试系统
本申请要求于2022年08月03日提交中国专利局、申请号为202222040481.1、申请名称为“一种柔性线路板测试系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，具体涉及一种柔性线路板测试系统。
背景技术
新能源汽车上使用的电池主要是多模组结构，包含的电芯数量较多，为了确保电池性能需要对每个电芯进行监控(如温度和电压)，需要将电芯与监控单元进行连接。
目前，主要实现方式是使用FPC(Flexible Printed Circuit，柔性线路板)线束实现电芯与监控单元的连接，虽然FPC具有很多优势，但也存在一些缺点，如结构强度差、易损伤等，因此如果不能有效识别FPC的异常，就会造成产品直接报废，出现批量异常。
然而，现有对FPC的测试存在一定难度，需要用到专业性的设备，由于电池模组结构各不相同，FPC种类繁多，需要有不同型号的测试设备，导致FPC测试成本很高。
发明内容
鉴于上述问题，本申请提供一种柔性线路板测试系统，以实现柔性线路板的性能测试的同时，不会对柔性线路板造成损伤。
第一方面，本申请提供了一种柔性线路板测试系统，包括：环境平台、电压模拟模块、测试采样模块以及上位机；所述环境平台包括温度调节模块和多个连接卡扣，所述温度调节模块用于为被测柔性电路板提供环境温度，所述连接卡扣用于与被测柔性线路板的电压点位电连接；所述电压模拟模块包括电压源和分压模块，所述分压模块与所述电压源电连接，并具有多条用于输出分压电压的支路，每条所述支路与一个所述连接卡扣电连接；所述测试采样模块包括温度采样模块和电压采样模块，所述温度采样模块与所述被测柔性线路板的第一接线端子电连接，所述电压采样模块与所述被测柔性线路板的第二接线端子电连接；所述上位机，与所述测试采样模块连接。
本申请实施例的技术方案中，通过环境平台的连接卡扣可以确保被测FPC上各个电压点位与相应的支路稳定连接的同时，保护被测FPC的外观完整性，确保测试过程中对FPC无损伤，并通过环境平台的温度调节模块为被测FPC提供温度环境，通过电压模拟模块的分压模块所提供的多条支路实现多个电压信号输出，为被测FPC每个电压点位提供电压信号，实现真实使用场景的模拟，提高测试可靠性及效率，然后通过测试采样模块的温度采样模块和电压采样模块采集被测FPC在测试过程中的电压、温度测试数据，并由上位机保存记录，以实现被测FPC电压采样性能和温度采样性能的测试的同时，便于追溯与查询。本专利方案实施成本比较低，并且将被测FPC置于环境平台后便可以实现测试，操作比较方便。
在一些实施例中，所述分压模块包括多个串联的分压电阻；其中，所述多个串联的分压电阻的两端分别连接一条支路，且每相邻两个分压电阻之间连接一条支路。通过使用多个分压电阻串联，以实现电压源电压的分压，从而在各个分压电阻的两端便可以引出分压支路，以为被测FPC的各个电压点位提 供相应的分压信号。并且通过调节分压电阻的大小，还可以实现分压信号大小的调节。
在一些实施例中，在每条所述支路均设置开关和保险丝，其中，所述保险线的熔断条件小于所述被测FPC上电压点位的熔断条件。通过控制每条支路上的开关，可以实现被测FPC上电压点位接入数量的调节，以适应不同测试需求；通过使用保险丝可以避免测试过程中由于电压源不稳定导致的电压波动或大电流造成对FPC造成的损伤，确保被测FPC的性能完整。
在一些实施例中，所述环境平台还包括湿度调节模块，其用于为所述被测柔性线路板提供环境湿度。在实际应用场景中，由于FPC性能受温度和湿度影响比较大，因此通过在环境平台上增设湿度调节模块，可以为被测FPC提供真实的湿度模拟环境，实现FPC的性能测试。
在一些实施例中，所述环境平台还包括标准热敏电阻；所述标准热敏电阻与所述温度采样模块电连接。由于FPC内部本身设置有用于感测电芯温度的热敏电阻，因此通过在环境平台设置一标准热敏电阻，可以实现处于相同环境的标准热敏电阻202感测的温度与被测FPC201内部热敏电阻感测的温度的对比，进而实现被测FPC内部热敏电阻的测试。
在一些实施例中，所述标准热敏电阻的规格与所述被测柔性线路板中设置的热敏电阻的规格相同。通过将环境平台中的热敏电阻与被测FPC中的热敏电阻的规格保持一致，可以提升测试的准确性。
在一些实施例中，所述环境平台还包括控制器；所述控制器分别与所述温度调节模块和所述湿度调节模块电连接。通过在环境平台设置用于控制温湿度环境的控制器，可以自动实现环境平台提供的温湿度环境的可变控制，便于进行FPC的老化性能测试。
在一些实施例中，所述温度采样模块具有多路温度采样通道。通过在温度采样模块中设置多路采样通道，这样可以实现FPC内部每个热敏电阻的温度采样性能测试。
在一些实施例中，所述电压采样模块具有多路电压采样通道。通过在电压采样模块中设置多路采样通道，可以实现被测FPC各个电压点位的电压采样性能测试。
在一些实施例中，所述环境平台包括用于固定所述被测柔性线路板的台架。通过使用台架固定被测FPC，可以防止被测FPC在测试过程中发生移动或损伤。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的附图标号表示相同的部件。在附图中：
图1示出了本申请一些实施例的柔性线路板测试系统结构示意图之一；
图2示出了本申请一些实施例的柔性线路板测试系统的结构示意图之二；
图3示出了本申请一些实施例的温度采样模块的结构示意图；
图4示出了本申请一些实施例的电压采样模块的结构示意图。
具体实施方式中的附图标号如下：
柔性线路板测试系统100，电压模拟模块10、环境平台20、测试采样模块30、上位机40；
电压源101、分压模块102、分压电阻R1～Rn、保险丝F0～Fn、开关S0～Sn、卡扣K0～Kn、被测FPC201、标准热敏电阻202、温度调节模块203、控制器204、台架205、湿度调节模块206、温度采样模块301、电压采样模块302；
温度采样通道1～温度采样通道m+1、电压采样通道V0～电压采样通道Vn。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在一些用电设备上使用的新能源电池通常采用的是模组结构，其包含的电芯数量较多，为确保电池性能需要对每颗电芯进行监控。目前是采用FPC实现的模组结构中每颗电芯与监控单元的连接，虽然FPC具有很多的技术优点，如成本低、结构简单等，但同时也存在如结构强度差、易损伤的缺点，因此 需要测试FPC的性能是否存在异常。
然而，在电池领域，对于FPC性能测试有一定难度，一方面需要用到专业性的测试设备，成本比较高，另一方面由于不同模组结构包含的电芯数量不同，使用的FPC种类繁多，从而需要使用不同型号的测试设备。甚至有的厂家为了降低成本，选择免检或者部分抽检，但这种操作存在较大批量异常风险。
发明人研究发现，实现电池与监控单元连接关系的FPC主要起的是数据传输作用，例如传输电芯电压、电芯所处的环境温度，因此通过设计一种柔性线路板测试系统，以实现FPC数据传输性能的测试，有效识别FPC的异常问题。
该柔性线路板测试系统包括电压模拟模块、环境平台、测试采样模块以及上位机，通过环境平台来固定被测FPC，并为被测FPC提供测试环境，以确保测试过程中对FPC无损伤，并通过电压模拟模块分配电压信号给被测FPC，以为被测FPC提供真实使用场景模拟，提高测试可靠性及效率，然后通过测试采样模块采集被测FPC在测试过程中的测试数据，并上传至上位机，实现测试数据的保存记录，便于追溯与查询。本专利方案实施成本比较低，操作方便，并且对于多种型号FPC均具有适用性。
本申请实施例公开的柔性线路板测试系统，可以但不限用于电池的生产工艺，当然还可以用于其他类似结构体的生产工艺，实现对生产工艺上使用的FPC的性能测试，以提高FPC的可靠性，避免出现产品直接报废，造成的批量异常。
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
根据本申请的一些实施例，图1示出了本申请实施例提供的柔性线路板测试系统100的结构示意图，如图1所示，该柔性线路板测试系统100包括电压模拟模块10、环境平台20、测试采样模块30、以及上位机40，下面对柔性线路板测试系统100包括的各个结构进行详细说明：
首先，环境平台20用于固定被测FPC201，并为被测FPC201提供测试环境，同时还用来将电压模拟模块10提供的电压信号稳定传递给被测FPC201，电压信号再通过被测FPC201传递给测试采样模块30。环境平台20包括温度调节模块203和多个连接卡扣K0-Kn。温度调节模块203用于为被测FPC201提供环境温度，使得被测FPC处于一个可控的测试环境下，连接卡扣K0-Kn设置在被测FPC201的每个电压点位V0～Vn处，连接卡扣K0～Kn的一端与被测FPC201的电压点位V0～Vn分别对应电连接。在本实施例中，环境平台20可以采用高低温箱实现，以避免FPC测试过程受到外界环境影响。
其次，电压模拟模块10用于实现电芯电压的模拟，其包括电压源101和分压模块102，分压模块102与电压源101电连接，电压源101用于为分压模块102提供电压，且分压模块102具有多条用于输出分压信号的支路L0～Ln，支路L0～Ln与连接卡扣K0～Kn的另一端分别对应电连接。也即连接卡扣K0连接电压点位V0与支路L0，连接卡扣K1连接电压点位V1与支路L1，依次类推，连接卡扣Kn连接电压点位Vn与支路Ln，从而每条支路可以为被测FPC201的一个电压点位提供电压信号，达到电芯电压的模拟效果，实现真实使用场景的模拟。
每个连接卡扣通常由定位件和紧固件组成，定位件作用是在安装时，引导连接卡扣顺利、正确、快速的到达安装位置，紧固件作用是将连接卡扣锁紧与支路上，并保证使用过程中不脱落。由此可见，连 接卡扣K0～Kn，可以确保被测FPC上各个电压点位的线束与相应的支路稳定连接的同时，保护被测FPC的外观完整性。
具体地，电压源101可以采用恒压源或者高压源，为了实现电压的稳定输出，避免电压波动性太大，电压源101可以优选为可调节单通道恒压源，规格为0～100V，5A的直流恒压源，电压精度小于0.5％。
进一步地，分压模块102的分压信号支路数量，可以根据实际应用中使用的FPC的电压点位最大数量设置，且每条支路输出的分压信号大小可以根据实际需求进行调节。在测试时，将被测FPC的每个电压点位与分压模块102的支路依次对接，对于剩余的支路可以悬空，因此这些支路L0～Ln可以适应不同型号FPC的测试。
通常，在封装电池模组结构时，是以串联方式组装电芯，假设一个模组结构由5颗电芯串联组装，那么需要选择串数为5串的FPC，且FPC需要具备6个电压点位，以实现5颗电芯电压信号的传输。在测试该FPC时，假设分压模块102的分压信号支路数量为10条，FPC的电压点位有6个，也即可连接的电芯数量为5颗，此时FPC的6个电压点位与分压模块102的前6条支路分别对接，剩余的4条支路悬空。
最后，测试采样模块30用于对被测FPC201的测试过程进行采样，其与上位机40电连接，测试采样模块30包括温度采样模块301和电压采样模块302，具体地，温度采样模块301与被测FPC201的第一接线端子电连接，电压采样模块302与被测FPC201的第二接线端子电连接，温度采样模块301和电压采样模块302分别将被测FPC201的电压采样数据和温度采样数据上传至上位机40存储记录，以便于根据这些数据判定被测FPC201性能是否异常。实现被测FPC201电压采样性能和温度采样性能的测试。
其中，在实际应用中，被测FPC通常提供有用于与监控单元连接的多路接线端子，以将电池模组中各个电芯的电芯电压传输给监控单元，第一接线端子为多路接线端子中属于温度通道的接线端子，便于将被测FPC内部热敏电阻感测的温度传递给温度采样模块301，第二接线端子为多路接线端子中属于电压通道的接线端子，便于将被测FPC接收的各个电压点位的电压信号传递给电压采样模块302。
可选的，上位机40与测试采样模块30之间的通信连接，可以是RS485通信方式，也可以是Can总线通信方式，本申请对此不进行具体限定。
基于上述实施例提供的柔性线路板测试系统，通过环境平台的连接卡扣可以确保被测FPC上各个电压点位与相应的支路稳定连接的同时，保护被测FPC的外观完整性，确保测试过程中对FPC无损伤，并通过环境平台的温度调节模块为被测FPC提供温度环境，通过电压模拟模块的分压模块所提供的多条支路实现多个电压信号输出，为被测FPC每个电压点位提供电压信号，实现真实使用场景的模拟，提高测试可靠性及效率，然后通过测试采样模块的温度采样模块和电压采样模块采集被测FPC在测试过程中的电压、温度测试数据，并由上位机保存记录，以实现被测FPC电压采样性能和温度采样性能的测试的同时，便于追溯与查询。本专利方案实施成本比较低，并且将被测FPC置于环境平台后便可以实现测试，操作比较方便。
根据本申请的一些实施例，参照图2所示，分压模块102包括多个串联的分压电阻R1～Rn。
其中，这些分压电阻的两端分别连接一条支路，且每相邻两个分压电阻之间连接一条支路，也即分 压电阻R1的一端连接支路L0，分压电阻R1与分压电阻R2之间连接支路L1，分压电阻R2与分压电阻R3之间连接支路L2，以此类推。并且通过调节分压电阻的大小可以改变输出分压信号大小。
在具体实施时，分压电阻R1～Rn可以采用精密电阻，以提高分压信号的精度。
进一步地，由于电池模组中各个电芯的性能基本一致，输出的电芯电压相同，因此分压模块102的分压电阻R1～Rn可以是均匀分压后，输出给被测FPC各电压点位。例如，假设电压源101输出电压为75V，串联的分压电阻数量n＝20，且每个分压电阻的阻值相同，那么可以实现每串75/20＝3.75V的电压输出，也即任意两条相邻支路分压信号的电势差为3.75V。
在本实施例中，通过使用多个分压电阻R1～Rn串联，以实现电压源电压的分压，从而在各个分压电阻的两端便可以引出分压支路，以为被测FPC201的各个电压点位V0～Vn提供相应的分压信号。并且通过调节分压电阻的大小，还可以实现分压信号大小的调节。
根据本申请的一些实施例，参照图2所示，可以在每条支路上均设置开关，也即支路L0上设置开关S0，支路L1上设置开关S1，以此类推，支路Ln上设置开关Sn。
其中，每条支路上设置的开关可以根据实际需求控制其断开或者闭合。在该支路与被测FPC201的一个电压点位连接时，那么如果控制开关闭合，则该支路输出的分压信号会传递给相应的电压点位，如果控制开关断开，则该支路输出的分压信号不会传递给相应的电压点位；在该支路没有与被测FPC201的电压点位连接时，那么如果控制开关断开，还可以阻断外界信号对电压模拟模块10的干扰。
由此可见，通过在每条支路设置开关，可以实现被测FPC上电压点位接入数量的调节，以适应不同测试需求。同时在某条支路未连接电压点位时还可以通过控制开关断开，以阻断外界信号对电压模拟模块10的干扰。
进一步地，每条支路上还可以设置保险丝，也即支路L0上设置保险丝F0，支路L1上设置保险丝F1，以此类推，支路Ln上设置保险丝Fn。值得注意的是，每条支路上保险丝的熔断条件要小于被测FPC上电压点位的熔断条件。
其中，每条支路上的保险丝可以起到保护被测对象的作用，在测试过程中，由于电压源的不稳定因素，会出现电压波动或大电流情况，这样就可能造成被测FPC的损伤，通过在每条支路设置保险丝，如果出现电压波动或大电流，由于保险丝的熔断条件比被测FPC的低，因此保险丝先于被测FPC烧断，避免了被测FPC在测试过程中受损，保护被测FPC的性能完整性。
根据本申请的一些实施例，参照图2所示，环境平台20还可以包括台架205，其用于固定被测FPC201。
其中，通过将台架205置于环境平台20中，并将被测FPC201置于台架上固定起来，可以防止被测FPC在测试过程中发生移动或损伤。
根据本申请的一些实施例，参照图2所示，环境平台20还包括湿度调节模块206，其用于为被测FPC201提供环境湿度。在实际应用场景中，由于FPC性能除了受温度影响之外，还受湿度影响，因此通过在环境平台20上设置湿度调节模块206，可以为被测FPC201提供真实的湿度模拟环境，实现FPC的性能测试。
进一步地，环境平台20还包括标准热敏电阻202，其与温度采样模块301电连接。
其中，标准热敏电阻202采集的温度作为被测FPC201所处环境的标准温度，由于FPC内部本身设置有用于感测电芯温度的热敏电阻，因此通过在环境平台20设置一标准热敏电阻202，可以实现处于相同环境的标准热敏电阻202感测的温度与被测FPC201内部热敏电阻感测的温度的对比，进而实现被测FPC内部热敏电阻的测试。
也就是说，如果被测FPC201内部热敏电阻感测的温度与标准热敏电阻202感测的温度相差比较大，说明被测FPC201内部热敏电阻存在异常。
需要说明的是，标准热敏电阻202的规格需要与被测FPC201中设置的热敏电阻的规格相同，这样可以提升测试的准确性。
根据本申请的一些实施例，参照图2所示，环境平台20还可以包括控制器204，其分别与温度调节模块203和湿度调节模块206电连接。
其中，控制器204用于控制温度调节模块203和湿度调节模块206提供的环境温度和环境湿度。可选的，控制器204可以采用单片机CPU实现，为了避免控制器204不被温湿度环境的侵蚀，可以将控制器204置于环境平台20之外。
由此可见，通过在环境平台20设置控制器204，可以自动实现环境平台20提供的温湿度环境的可变控制，便于进行FPC的老化性能测试。
具体地，可以将初始的环境温度设置为85℃，升温速度设置为5℃/min，初始的环境湿度设置为85％，保温时间为48小时，通过上位机40持续监控被测FPC的电压采样性能与温度采样性能，从而可以验证被测FPC在高温高湿条件下的老化性能。
在一具体实施例中，如图3所示，温度采样模块301具有多路温度采样通道1～m+1。
其中，每路温度采样通道可以实现一个热敏电阻的温度采样，且每路温度采样通道与热敏电阻的两端连接，其中热敏电阻的一端为正“+”，另一端为负“-”。
可以理解的是，本申请对温度采样模块301中的温度采样通道数量不进行具体限定，且每路温度采样通道的结构相同，具体可以采用温度采样变送器结构。
由此可见，通过在温度采样模块301中设置多路采样通道，这样可以实现被测FPC内部每个热敏电阻的温度采样性能测试。
需要说明的是，被测FPC中的热敏电阻可以是一个，也可以是多个，本申请对此不进行具体限定。
在一具体实施例中，如图4所示，电压采样模块302具有多路电压采样通道V0～Vn。
其中，每路电压采样通道用于实现被测FPC上一个电压点位的电压采样，也即电压采样通道V0用于实现被测FPC上电压点位V0的电压采样，电压采样通道V1用于实现被测FPC上电压点位V1的电压采样，依次类推。
可选的，每路电压采样通道可以采用电压采样A/D转换器实现。
由此可见，通过在电压采样模块302中设置多路采样通道，可以实现被测FPC各个电压点位的电压采样性能测试。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记 载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。

Claims (10)

  1. 一种柔性线路板测试系统，其中，包括：环境平台、电压模拟模块、测试采样模块以及上位机；
    所述环境平台包括温度调节模块和多个连接卡扣，所述温度调节模块用于为被测柔性电路板提供环境温度，所述连接卡扣用于与被测柔性线路板的电压点位电连接；
    所述电压模拟模块包括电压源和分压模块，所述分压模块与所述电压源电连接，并具有多条用于输出分压电压的支路，每条所述支路与一个所述连接卡扣电连接；
    所述测试采样模块包括温度采样模块和电压采样模块，所述温度采样模块与所述被测柔性线路板的第一接线端子电连接，所述电压采样模块与所述被测柔性线路板的第二接线端子电连接；
    所述上位机，与所述测试采样模块连接。
  2. 根据权利要求1所述的系统，其中，所述分压模块包括多个串联的分压电阻；
    其中，所述多个串联的分压电阻的两端分别连接一条支路，且每相邻两个分压电阻之间连接一条支路。
  3. 根据权利要求1所述的系统，其中，每条所述支路均设置有开关和保险丝；
    其中，所述保险线的熔断条件小于所述被测柔性线路板上电压点位的熔断条件。
  4. 根据权利要求1所述的系统，其中，所述环境平台还包括湿度调节模块，其用于为所述被测柔性线路板提供环境湿度。
  5. 根据权利要求1所述的系统，其中，所述环境平台还包括标准热敏电阻；所述标准热敏电阻与所述温度采样模块电连接。
  6. 根据权利要求5所述的系统，其中，所述标准热敏电阻的规格与所述被测柔性线路板中设置的热敏电阻的规格相同。
  7. 根据权利要求4所述的系统，其中，所述环境平台还包括控制器；
    所述控制器分别与所述温度调节模块和所述湿度调节模块电连接。
  8. 根据权利要求1所述的系统，其中，所述温度采样模块具有多路温度采样通道。
  9. 根据权利要求1所述的系统，其中，所述电压采样模块具有多路电压采样通道。
  10. 根据权利要求1-9任一项所述的系统，其中，所述环境平台还包括用于固定所述被测柔性线路板的台架。
PCT/CN2023/102748 2022-08-03 2023-06-27 一种柔性线路板测试系统 WO2024027373A1 (zh)

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