WO2020083368A1 - 一种极片电阻测量仪、系统及方法 - Google Patents

一种极片电阻测量仪、系统及方法 Download PDF

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Publication number
WO2020083368A1
WO2020083368A1 PCT/CN2019/113248 CN2019113248W WO2020083368A1 WO 2020083368 A1 WO2020083368 A1 WO 2020083368A1 CN 2019113248 W CN2019113248 W CN 2019113248W WO 2020083368 A1 WO2020083368 A1 WO 2020083368A1
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Prior art keywords
pole piece
pressure
control
resistance
resistance measuring
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PCT/CN2019/113248
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English (en)
French (fr)
Inventor
张兴华
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张兴华
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Publication of WO2020083368A1 publication Critical patent/WO2020083368A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Definitions

  • the present invention relates to a detection device, and in particular, to a pole piece resistance measuring instrument, system, and method.
  • the battery can obtain a current having a stable voltage, a stable current, a long-term stable power supply, and little influence from the outside world.
  • the battery has a simple structure, is easy to carry, and is easy to charge and discharge. The influence of temperature and stable and reliable performance play a great role in all aspects of modern social life. Because the performance of the pole piece directly affects the internal resistance of the finished battery, engineers need to perform resistance testing on the pole piece during battery development and production.
  • Some pole piece resistance testers can apply variable pressure to the battery pole piece, and can instantly measure the pressure value, pole piece resistance value and thickness change value, and establish the pressure of the secondary battery pole piece, The relationship between extension and resistance changes, but the calculation and display of other parameters of resistance in the prior art is not intuitive, lacks practicality and has a safe operation and protection structure, so the present invention provides a solenoid valve, display screen, A pole piece resistance measuring instrument, system and method with buttons and PC-side software.
  • the present invention provides a pole piece resistance measuring instrument, system and method, which is convenient for resistance value detection and viewing of the internal working condition of the measuring instrument, and aims to improve the deficiencies of the existing resistance measuring instrument.
  • the present invention discloses a pole piece resistance measuring instrument, including:
  • a pressure device installed on the base, the pressure device has an upper pressure head opposite to the lower pressure head, so that the upper pressure head is placed on the lower pressure head Variable pressure applied to the pole piece resistance to be measured [0010] a pressure sensor, provided on the pressure applying device, for obtaining the pressure applied to the resistance of the pole piece to be measured;
  • control box includes a control main board, a resistance measuring main board electrically connected to the control main board, an air pressure regulating valve, and a liquid crystal display; the resistance measuring main board is connected to the upper and lower pressure heads; The air pressure regulating valve communicates with the pressure applying device.
  • the pressure applying device further includes a movable cylinder, a cylinder connecting rod, a first spring, an upper movable plate, a lower movable plate, a second spring, an upper fixed plate, a lower fixed plate, and a linear bearing;
  • the output end of the movable cylinder is connected to the cylinder connecting rod through the upper fixing plate, the cylinder connecting rod extends downward through the upper movable plate, and the first spring is sleeved on both sides of the first spring A portion of the linear bearing located above the lower movable plate, and can slide up and down along the linear bearing to play a buffering role; the upper movable plate and the lower movable plate are respectively located on the upper and lower sides of the first spring , The upper head is installed below the lower movable plate and is aligned with the lower head installed above the lower fixed plate;
  • the second spring is sleeved on both sides of the linear bearing below the lower movable plate, and can slide up and down along the linear bearing to play a buffering role; the linear bearing is divided on both sides Vertically supported between the upper fixing plate and the lower fixing plate, and the upper fixing plate and the lower fixing plate are located above the control box; the pressure applying device is installed above the base through the lower fixing plate.
  • the upper indenter and the lower indenter are made of copper material, and a gold plating process is performed on the surface.
  • it further includes a protection box, the protection box is provided on the base, and the pressure applying device is covered; wherein, a box door is provided on the front side of the protection box, A transparent window is arranged on the box door.
  • it further includes a temperature and humidity sensor connected to the control main board, the temperature and humidity sensor is provided in the protection box.
  • it further includes four adjusting foot pads provided at the bottom of the control box to ensure that the whole is in a horizontal position by the adjusting foot pads.
  • it further includes a power supply and a solenoid valve, and the power supply and the solenoid valve are both electrically connected to the control main board.
  • An embodiment of the present invention also provides a pole piece resistance measuring system, including a control terminal and the pole piece resistance measuring instrument as described above; the control terminal is connected to the control motherboard of the pole piece resistance measuring instrument through a serial port; Medium:
  • the control terminal is installed with control software, and the control terminal is configured to receive control parameters input by a user based on the interface of the control software, and send the control parameters to the control main board;
  • the control main board is configured to control the output air pressure of the air pressure adjustment valve based on the control parameter, so as to realize the control of the pressure applied by the pressure applying device.
  • control parameters include at least one of the following: applied pressure, duration of applied pressure, period of applied pressure.
  • the embodiment of the present invention also stays on a pole piece resistance measuring method based on the above pole piece resistance measuring instrument, including
  • S1 at the same position of the pole piece resistance to be tested, N different forward pressure parameters are used for testing to obtain the test resistance value of the pole piece resistance to be tested under each forward pressure parameter tends to Stable N first relative times; where, for each forward pressure parameter, the test resistance value of the resistance of the pole piece to be measured is collected every predetermined time, and the test resistance value trend is obtained according to the collected multiple test resistance values For a stable first relative time;
  • S2 The maximum value of the obtained N first relative times is used as the second relative time when the resistance of the pole piece to be measured tends to be stable;
  • S3 at the same location, according to M different forward pressure parameters and the second relative time, collecting M conductivity values of the pole piece resistance to be measured under different forward pressure parameters;
  • the M conductivity values obtain the optimal conductivity at the position and the reference forward pressure parameter corresponding to the optimal conductivity;
  • FIG. 1 is a schematic structural diagram of a pole piece resistance measuring instrument provided by a first embodiment of the present invention
  • FIG. 2 is a control principle diagram of a pole piece resistance measurement system provided by a second embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a method for measuring pole piece resistance according to a third embodiment of the present invention.
  • a first embodiment of the present invention provides a pole piece resistance measuring instrument
  • the pole piece resistance measuring instrument includes:
  • a pressure applying device mounted on the base 2 the pressure applying device has an upper indenter 4 disposed opposite to the lower indenter 3, so as to be placed on the lower by the upper indenter 4 pair
  • the resistance of the pole piece to be measured on the indenter 3 applies variable pressure
  • the pressure sensor 5 is disposed on the pressure applying device, and is used to obtain the pressure applied by the resistance of the pole piece to be measured [0041]
  • the control box 1 includes a control main board, a resistance measuring main board electrically connected to the control main board, an air pressure regulating valve 6 and a liquid crystal display 7; the resistance measuring main board and the upper head 4 and the lower The pressure head 3 is connected; the air pressure regulating valve 6 communicates with the pressure applying device.
  • the pressure applying device includes a movable cylinder 8, a cylinder connecting rod 9, a first spring 10, an upper movable plate 11, a lower movable plate 12, a second spring 13, an upper fixed plate 14, a lower Fixed plate 15, linear bearing 16;
  • the output end of the movable cylinder 8 is connected to the cylinder connecting rod 9 through the upper fixing plate 14, the cylinder connecting rod 8 extends downward through the upper movable plate 11, and the first spring 10 points
  • the two sides are sleeved on the upper part of the lower movable plate 12 of the linear bearing 16 described below, and can slide up and down along the linear bearing 16 to play a buffering role; the upper movable plate 11 and the lower movable plate 12 are located in the On the upper and lower sides of the first spring 10, the upper head 4 is installed below the lower movable plate 12 and is aligned with the lower head 3 installed above the lower fixed plate 15.
  • the second spring 13 is sleeved on both sides of the lower movable plate 12 of the linear bearing 16 on both sides, and can slide up and down along the linear bearing 16 to play a buffering role;
  • the linear bearing 16 It is vertically supported on both sides between the upper fixing plate 14 and the lower fixing plate 15, and the upper fixing plate 14 and the lower fixing plate 15 are located above the control box 1, in addition to being used for carrying a pressure applying device, It can cooperate with the upper pressure head 4 and the lower pressure head 3 to clamp the fixed pole piece resistor;
  • the pressure applying device is installed above the base 2 through the lower fixing plate 15 and can be installed in the cylinder connecting rod 9 and linear bearing 16 and other equipment Under the guidance of the pressure, the clamped and fixed pole piece pressure is applied and the thickness measurement value is accurately measured in conjunction with the resistance measurement main board, and then the resistance value under different pressures is measured through the air pressure adjustment valve 6.
  • control box 1 realizes a simplified operation through the connection, transmission and work control of its internal components; wherein, the control main board realizes the connection between the two by connecting the air pressure regulating valve 6 and the pressure applying device Parameter transmission and control;
  • the resistance measurement board can measure various parameters at the same time through data processing, including pole piece resistance, thickness, pressure, pressure, conductivity, and resistivity, which can be transmitted to the control board and displayed on the LCD screen 7
  • the air pressure regulating valve 6 is used to adjust the pressure and moving direction of the movable cylinder 8, and it is placed on the outside of the control box 1 to facilitate the reading and operation of the user; the liquid crystal display 7 passes through the data line
  • the connection with the pressure sensor 5 displays the current parameters, which is convenient for the user to observe the current dynamics of the device;
  • the base 2 is both an electrical box and an installation basis for other components and equipment.
  • the upper indenter 4 and the lower indenter 3 are made of copper material, and the surface is gold plated Art processing, and the upper head 4 and the lower head 3 should be as horizontal as possible to ensure uniform force and improve measurement accuracy
  • the protective box is provided on the base 2 and covers the pressure device; wherein, the front side of the protective box is provided with a door, so There is a transparent window on the door
  • the protective box is a safety protection device, which can protect the built-in instruments very well and reduce the probability of damage caused by impact, friction or other external forces of internal equipment It uses many materials, such as aluminum, galvanized steel and other shell materials with excellent characteristics; the box door and transparent window are provided on the outer surface of the pressure device to achieve safe storage and real-time situation For the purpose of monitoring, the transparent window may use some common transparent plastic materials.
  • the control main board further includes a temperature and humidity sensor connected to the control main board, the temperature and humidity sensor is provided in the protection box, and communicates through an IIC interface to achieve wide voltage power supply.
  • the temperature and humidity sensor can be used to detect the temperature change inside the pole piece resistance measuring instrument, to prevent the performance of each device from decreasing when the temperature rises, and the semiconductor contained in the circuit that generates heat is released into the air The heat will increase the ambient temperature, weaken the heat dissipation effect, and further cause the temperature of the semiconductor device to increase, affecting the normal operation of the device.
  • the temperature and humidity sensor detects the ambient temperature and can prompt and take measures to reduce the temperature when the temperature is too high. Ensure that the ambient temperature is normal; in addition, the humidity of the external environment where the instrument is located must also be kept within a suitable range.
  • it further includes four adjusting foot pads 17 provided at the bottom of the control box 1, so as to ensure that the whole is in a horizontal position by the adjusting foot pads 17, which also helps the operator while playing a supporting role Properly adjust the height of the meter box.
  • the switch button 18 is installed on the control box 1 to play a role in controlling the power on and off; the power supply and the solenoid valve 19 are both
  • the control main board is electrically connected; wherein, the solenoid valve 19 changes the airflow direction through its own power-on and power-off, thereby controlling the piston of the movable cylinder 8 to reciprocate; wherein, there are various ways to control the movement of the movable cylinder 8
  • the solenoid valve 19 control used in the present invention is only one of them, in addition to this, manual control can also be used Or mechanical control; the specific method is to replace the solenoid valve 19 with a handle-operated directional valve, or use a mechanical valve to control the pneumatic directional valve and then control the movement of the cylinder. Its characteristic is that the control system is purely pneumatic and does not involve circuits
  • the specific structure of the pole piece resistance measuring instrument of the present invention may also be modified in one or more of the following ways: 1) The fixed connection between each element may be achieved by screws, It can also be achieved by other suitable methods, such as snap connection, pin hole connection, etc .;
  • the upper pressure piece 4 and the lower pressure piece 3 can be inlaid with magnets at both ends, or one of them is inlaid with magnets, and the other is inlaid with materials that can be attracted by the magnets (such as iron, etc.), as long as they can attract each other to achieve the pole pieces
  • the clamping of the resistor can be fixed; 3)
  • the number of certain components can be changed according to the actual situation, and will not affect the realization of its function, such as the cylinder connecting rod 9, the first spring 10, the second spring 13, straight line Bearing 16 and adjusting pad 17 etc.
  • the air pressure regulating valve 6 is connected to the air, the device is connected to the power supply, the communication line is connected, the computer software is opened, the communication is normal, the device and the LCD display 7 are cut normally; the solenoid valve 19 is activated to make the movable cylinder 8 Drive the upper indenter 4 to move up, open the door of the box, place the pole piece resistor between the upper indenter 4 and the lower indenter 3 and fix it, and extend the to-be-measured end of the pole piece resistance to the lower indenter 3 Above and in contact with its top, close the box door; press the switch button 18, start the solenoid valve 19 to move the movable cylinder 8 to push the upper head 4 down to apply pressure to the resistance of the pole piece, and rotate the air pressure regulating valve 6
  • the knob gradually increases the air pressure until the pressure value displayed on the LCD screen 7 reaches the predetermined maximum pressure; during this process, a test process can be set on the PC software to repeat the test, or a single-point test,
  • the pole piece resistance measuring instrument provided by the embodiment of the present invention can be controlled by adding a solenoid valve, a cabinet and combining with PC-side software in the prior art to achieve the purpose of more convenient resistance value detection And at the same time check the internal working conditions of the measuring instrument, which improves the shortcomings of the existing resistance measuring instrument.
  • the second embodiment of the present invention also provides a pole piece resistance measuring system, including a control terminal and the above pole piece resistance measuring instrument, the control terminal is connected to the control board of the pole piece resistance measuring instrument through a serial port ; among them:
  • the control terminal is installed with control software, and the control terminal is configured to receive control parameters input by a user based on the interface of the control software, and send the control parameters to the control motherboard;
  • the control main board is configured to control the output air pressure of the air pressure adjustment valve based on the control parameter, so as to realize the control of the pressure applied by the pressure applying device.
  • the software and hardware function realization modules included in the control main board are: PC-side software, pressure sensor 5 and temperature and humidity sensor, resistance measurement main board, liquid crystal display 7, pressure applying device, Air pressure regulating valve 6, switch button 18 and solenoid valve 19; wherein, the PC-side software connects to the control board through a serial port and performs data analysis and chart display of the collected control parameters, the pressure sensor 5 and the temperature and humidity sensor are both passed
  • the mechanical and electronic connections transmit the obtained control parameters to the control main board, the resistance measuring main board and the control main board work together, its digital interface obtains the required variables for pole piece performance analysis, and the LCD 7 controls the data of the main board The changes are visually displayed to improve the use efficiency.
  • the pressure applying device measures and analyzes the difference of the resistance of the pole pieces clamped under different pressures through transmission, pneumatic and electronic technologies.
  • the air pressure regulating valve 6 is a comparison of the control main board The test provides corresponding changes in pressure and pressure parameters.
  • the switch button 18 is Solenoid valve 19 are respectively applied to the control board and the power-off of the moving cylinder 8 reciprocates.
  • control parameter includes at least one of the following: applied pressure, duration of the applied pressure, period of the applied pressure.
  • the third embodiment of the present invention also provides a pole piece resistance conductivity test method, wherein [0065] SI: under the same position of the pole piece resistance to be tested, N different forward pressure parameters are used for testing to obtain the test resistance value of the pole piece resistance to be tested under each forward pressure parameter tends to Stable N first relative times; where, for each forward pressure parameter, the test resistance value of the resistance of the pole piece to be measured is collected every predetermined time, and the test resistance value trend is obtained according to the collected multiple test resistance values For a stable first relative time;
  • S2 The maximum value of the obtained N first relative times is used as the second relative time when the resistance of the pole piece to be measured tends to stabilize together;
  • S3 at the same position, according to M different forward pressure parameters and the second relative time, collecting M conductivity values of the pole piece resistance to be measured under different forward pressure parameters;
  • the M conductivity values obtain the optimal conductivity at the position and the reference forward pressure parameter corresponding to the optimal conductivity;
  • S4 at different positions, according to the reference forward pressure parameter and the second relative time, collecting the conductivity value of the pole piece resistance to be measured at different positions to calculate the RSD of the conductivity at different positions %.
  • the electrical conductivity is a parameter used to describe the difficulty of charge flow in a substance
  • the current in the DC circuit is proportional to the conductance; if the conductance is doubled, the current is also doubled; if the conductance is reduced to 1/10 of its initial value, the current will also change It is 1/10 of the original.
  • the present invention uses multiple measurements in multiple states to obtain the best conductivity and its RSD%, improve the measurement accuracy, reduce the experimental error, better explore its common physical laws, and study its The physical quantities in different states provide a reliable guarantee for future research.
  • the conductivity of the pole piece resistance measured in the embodiment of the present invention affects the resistance of the whole battery, and has a major impact on the rate performance of the battery; by measuring the pole piece resistance, the uniformity of the microstructure in the pole piece resistance can be judged , The characteristics of electrode sheet resistance formula, material performance and prediction of battery performance; [0073] Further, in the battery pole piece, the main factors that affect the conductivity include the bonding interface between the foil substrate and the coating, the stepwise state of the conductive agent, the contact state between the particles, and so on.
  • the predetermined time in step S1 is 100ms; the test resistance value is the sum of the internal resistance R1 of the pole piece resistance measuring instrument, the total resistance R2 of the upper and lower indenters and the pole piece resistance R3.
  • the test resistance value of the resistance of the pole piece to be measured is collected every predetermined time, and the test resistance value tends to be stable according to the collected multiple test resistance values
  • the first relative time is:
  • S11 Testing under the same forward pressure parameter at the same location, collecting a test resistance value every 100 ms, and correlating the obtained test resistance value with the relative time;
  • step S11 in this embodiment, 50 to 200 test resistance values are collected, and then the difference between these resistance values and the threshold value are compared, and finally a set of stable relative time is obtained; wherein, The collected multiple test resistances ensure the accuracy of the obtained first relative time.
  • the step S3 is specifically:
  • S33 determine whether M different positive pressure parameters have been tested; if so, perform step S34; if not, continue to the next step S35;
  • step S30 in this embodiment, the pressure parameter M1 is first used to start the test, and then R2 is acquired and the resistance value and the thickness value are acquired to obtain the corresponding conductivity. After all the pressure parameters are tested, a group is obtained. The optimal conductivity and the corresponding reference forward pressure parameter; wherein, the M different forward pressure parameters are recursively tested to reduce the influence on the conductivity and its relative standard deviation RSD% due to different pressure parameters.
  • step S4 is specifically:
  • S42 Waiting for the second relative time, which tends to stabilize, to collect the resistance value and the thickness value, and at the same time calculate the corresponding conductivity to obtain a set of conductivity data at the current position;
  • S43 determine whether the Y different position parameters are tested; if so, perform step S44; if not, continue to the next step S45;
  • the step S41 only needs to obtain the resistance R2 once in this embodiment, and start the test using the position parameter Y1, and after all position parameters are tested, a set of conductivity data and corresponding relative standard deviations are obtained RSD%; wherein, the test is performed under Y different position parameters to reduce the influence on the conductivity and its relative standard deviation RSD% due to different pressure parameters;
  • the RSD is the relative standard deviation, also known as the standard deviation coefficient, the coefficient of variation, the coefficient of variation, etc., which is the value obtained by dividing the standard deviation by the corresponding average value multiplied by 100%, and used to analyze the results in the inspection work
  • the precision, its calculation formula (1) is as follows:
  • S is the standard deviation, which is the sum of the square of the deviation of each measurement data divided by the square root of the number of data minus 1.
  • the square deviation of the single data contained in it reflects the larger deviation prominently, so it passes the standard The deviation can explain the degree of dispersion of the measurement result data;
  • the arithmetic average value of the measured data can represent the average level of the overall measurement result.
  • the method for acquiring the internal resistance R1 of the pole piece resistance measuring instrument is specifically: measuring the pole piece resistance The probe of the instrument is shorted, and the measured resistance value is the internal resistance R1 of the pole piece resistance measuring instrument;
  • the method for obtaining the total resistance R2 of the upper and lower indenters is specifically as follows: the probe of the pole piece resistance measuring instrument is connected to the upper indenter 4 and the lower indenter 3, respectively, the upper indenter 4 and the lower indenter 3 Disturbance between the placement of electrode resistance, the upper indenter 4 and the lower indenter 3 contact conduction, measured the resistance value of the upper indenter 4 and the lower indenter 3 R2;
  • the method of acquiring the resistance value R3 of the pole piece resistance is specifically: placing the pole piece resistance between the upper head 4 and the lower head 3, the upper head 4 is pressed to squeeze the pole piece resistance, read The resistance of the tester minus the internal resistance value R1 of the pole piece resistance measuring instrument and the total resistance value R2 of the upper head 4 and the lower head 3 can be obtained as the resistance R3 of the pole piece
  • the contact area of the upper head 4 and the lower head 3 is fixed.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless otherwise specifically limited.
  • the terms “installation”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection, it can also be Removable connection, or integrated; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, may be the connection between two elements or the interaction relationship between two elements.
  • the first feature "on” or “below” the second feature may include the first and second features in direct contact, may also include the first and The second feature is not in direct contact but through another feature between them.
  • the first feature is “above” the second feature, “ “Above” and “above” include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below” and “Below” includes the first feature directly below and obliquely below the second feature, or simply means that the first feature is less than the second feature in height

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Abstract

一种极片电阻测量仪、系统及方法,该极片电阻测量仪包括:控制箱(1);设置于控制箱(1)上的底座(2);设置于底座(2)上的下压头(3);安装于底座(2)上的施压装置,施压装置具有与所述下压头(3)相对设置的上压头(4),以通过上压头(4)对放置于下压头(3)上的待测极片电阻施加可变压力;压力传感器(5),设置于施压装置上,用于获取待测极片电阻被施加的压力;其中,控制箱(1)包括控制主板、与控制主板电气连接的电阻测量主板、气压调节阀(6)以及液晶显示屏(7);电阻测量主板与上压头(4)及下压头(3)连接;气压调节阀(6)与施压装置连通。基于该测量仪,建立了受压、延展与电阻的变化关系,也提供了更便于操作的测量装置,完善了有关极片的研究。

Description

一种极片电阻测量仪、 系统及方法 技术领域
[0001] 本发明涉及检测装置, 具体而言, 涉及一种极片电阻测量仪、 系统及方法。
背景技术
[0002] 电池作为能量来源, 可以得到具有稳定电压, 稳定电流, 长时间稳定供电, 受 外界影响很小的电流, 并且电池结构简单, 携带方便, 充放电操作简便易行, 不受外界气候和温度的影响, 性能稳定可靠, 在现代社会生活中的各个方面发 挥有很大作用。 由于极片性能直接影响成品电池的内阻值, 所以, 在电池研发 和生产过程中工程师们需要对极片进行电阻测试。
[0003] 5见有的极片电阻测试仪可以对电池极片施加可变压力, 并对压力值、 极片电阻 值和厚度变化值进行即时测量, 并建立二次电池极片的受压、 延展与电阻的变 化关系, 但是现有技术中对电阻其他参数的计算和显示不够直观, 缺乏实用性 和具安全操作和保护方面的构造, 所以本发明提供了一种含有电磁阀、 显示屏 、 按钮与 PC端软件的极片电阻测量仪、 系统及方法。
发明概述
技术问题
[0004] 本发明提供了一种极片电阻测量仪、 系统及方法, 方便电阻值检测并查看测量 仪内部工作情况, 旨在改善现有电阻测量仪的不足之处。
问题的解决方案
技术解决方案
[0005] 本发明公开了一种极片电阻测量仪, 包括:
[0006] 控制箱;
[0007] 设置于所述控制箱上的底座;
[0008] 设置于所述底座上的下压头;
[0009] 安装于所述底座上的施压装置, 所述施压装置具有与所述下压头相对设置的上 压头, 以通过所述上压头对放置于所述下压头上的待测极片电阻施加可变压力 [0010] 压力传感器, 设置于所述施压装置上, 用于获取待测极片电阻被施加的压力;
[0011] 其中, 所述控制箱包括控制主板、 与所述控制主板电气连接的电阻测量主板、 气压调节阀以及液晶显示屏; 所述电阻测量主板与所述上压头及下压头连接; 所述气压调节阀与所述施压装置连通。
[0012] 优选地, 所述施压装置还包括活动气缸、 气缸连杆、 第一弹簧、 上活动板、 下 活动板、 第二弹簧、 上固定板、 下固定板以及直线轴承;
[0013] 所述活动气缸的输出端与气缸连杆通过所述上固定板相连, 所述气缸连杆经所 述上活动板向下伸出, 所述第一弹簧分两侧套设于所述直线轴承的位于下活动 板以上的部分, 且可沿着所述直线轴承上下滑动, 起到缓冲作用; 所述上活动 板以及所述下活动板分别位于所述第一弹簧的上下两侧, 所述上压头安装在下 活动板下方且与安装在所述下固定板上方的下压头对齐;
[0014] 所述第二弹簧分两侧套设于所述直线轴承的位于下活动板以下的部分, 且可沿 着所述直线轴承上下滑动, 起到缓冲作用; 所述直线轴承分两侧垂直支撑在所 述上固定板与下固定板之间, 且所述上固定板与下固定板位于所述控制箱上方 ; 所述施压装置通过下固定板安装在所述底座上方。
[0015] 优选地, 所述上压头与所述下压头采用铜材质制成, 且在表面进行了镀金工艺 处理。
[0016] 优选地, 还包括保护箱体, 所述保护箱体设置在所述底座上, 并罩设所述施压 装置; 其中, 所述保护箱体的前侧设置有箱门, 所述箱门上设置有透明窗口。
[0017] 优选地, 还包括与所述控制主板连接的温湿度传感器, 所述温湿度传感器设置 于所述保护箱体内。
[0018] 优选地, 还包括设置于所述控制箱底部的四个调节脚垫, 以通过所述调节脚垫 保证整体处于水平位置上。
[0019] 优选地, 还包括电源及电磁阀, 所述电源及所述电磁阀均与所述控制主板电气 连接。
[0020] 本发明实施例还提供一种极片电阻测量系统, 包括控制终端及如上述的极片电 阻测量仪; 所述控制终端通过串口与所述极片电阻测量仪的控制主板连接; 其 中:
[0021] 所述控制终端上安装有控制软件, 所述控制终端, 用于接收用户基于所述控制 软件的界面输入的控制参数, 并将所述控制参数发送给所述控制主板;
[0022] 所述控制主板, 用于基于所述控制参数控制所述气压调节阀的输出气压, 从而 实现对施压装置的施压的控制。
[0023] 优选地, 所述控制参数至少包括以下其中之一: 施加的压力、 施加压力的持续 时间、 施加压力的周期。
[0024] 本发明实施例还停留一种基于上述的极片电阻测量仪的极片电阻测量方法, 包 括
[0025] S1:在待测极片电阻的同一位置下, 采用 N个不同正向压强参数进行测试, 以 获得所述待测极片电阻在每个正向压强参数下的测试电阻值趋于稳定的 N个第一 相对时间; 其中, 对于每个正向压强参数, 每隔预定时间采集所述待测极片电 阻的测试电阻值, 并根据采集的多个测试电阻值获得测试电阻值趋于稳定的第 一相对时间;
[0026] S2:将获得的 N个第一相对时间的最大值作为所述待测极片电阻共同趋于稳定 的第二相对时间;
[0027] S3:在同一位置, 根据 M个不同的正向压强参数以及所述第二相对时间, 采集 所述待测极片电阻在不同正向压强参数下的 M个电导率值; 根据所述 M个电导率 值获取在该位置下的最佳电导率以及与所述最佳电导率相应的参考正向压强参 数;
[0028] S4:在不同位置, 根据所述参考正向压强参数以及第二相对时间, 采集所述待 测极片电阻在不同位置的电导率值, 以计算出不同位置下的电导率的 RSD%。 发明的有益效果
有益效果
[0029] 本发明实施例提供的极片电阻测量仪、 系统及方法, 通过在现有技术上增加电 磁阀、 箱体并结合 PC端软件进行控制, 达到了更便于电阻值检测的目的, 且同 时查看测量仪内部工作情况, 改善了现有电阻测量仪的不足之处。
对附图的简要说明 附图说明
[0030] 为了更清楚地说明本发明实施方式的技术方案, 下面将对实施方式中所需要使 用的附图作简单地介绍, 应当理解, 以下附图仅示出了本发明的某些实施例, 因此不应被看作是对范围的限定, 对于本领域普通技术人员来讲, 在不付出创 造性劳动的前提下, 还可以根据这些附图获得其他相关的附图。
[0031] 图 1是本发明第一实施例提供的的一种极片电阻测量仪的结构示意图;
[0032] 图 2是本发明第二实施例提供的的一种极片电阻测量系统的控制原理图;
[0033] 图 3是本发明第三实施例提供的的极片电阻测量方法的流程示意图。
发明实施例
本发明的实施方式
[0034] 为使本发明实施方式的目的、 技术方案和优点更加清楚, 下面将结合本发明实 施方式中的附图, 对本发明实施方式中的技术方案进行清楚、 完整地描述, 显 然, 所描述的实施方式是本发明一部分实施方式, 而不是全部的实施方式。 基 于本发明中的实施方式, 本领域普通技术人员在没有作出创造性劳动前提下所 获得的所有其他实施方式, 都属于本发明保护的范围。 因此, 以下对在附图中 提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围, 而是仅仅表示本发明的选定实施方式。 基于本发明中的实施方式, 本领域普通 技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式, 都属于本 发明保护的范围。
[0035] 请参阅图 1, 本发明第一实施例提供了一种极片电阻测量仪, 该极片电阻测量 仪包括:
[0036] 控制箱 1 ;
[0037] 设置于所述控制箱 1上的底座 2;
[0038] 设置于所述底座 2上的下压头 3 ;
[0039] 安装于所述底座 2上的施压装置, 所述施压装置具有与所述下压头 3相对设置的 上压头 4, 以通过所述上压头 4对放置于所述下压头 3上的待测极片电阻施加可变 压力;
[0040] 压力传感器 5, 设置于所述施压装置上, 用于获取待测极片电阻被施加的压力 [0041] 其中, 所述控制箱 1包括控制主板、 与所述控制主板电气连接的电阻测量主板 、 气压调节阀 6以及液晶显示屏 7 ; 所述电阻测量主板与所述上压头 4及下压头 3 连接; 所述气压调节阀 6与所述施压装置连通。
[0042] 在本实施例中, 所述施压装置包括活动气缸 8、 气缸连杆 9、 第一弹簧 10、 上活 动板 11、 下活动板 12、 第二弹簧 13、 上固定板 14、 下固定板 15、 直线轴承 16;
[0043] 所述活动气缸 8的输出端与气缸连杆 9通过所述上固定板 14相连, 所述气缸连杆 8经所述上活动板 11向下伸出, 所述第一弹簧 10分两侧套设于下述直线轴承 16的 下活动板 12以上部分, 且可沿着所述直线轴承 16上下滑动, 起到缓冲作用; 所 述上活动板 11、 下活动板 12分别位于所述第一弹簧 10的上下两侧, 所述上压头 4 安装在下活动板 12下方且与安装在所述下固定板 15上方的下压头 3对齐。
[0044] 所述第二弹簧 13分两侧套设于所述直线轴承 16的下活动板 12以下部分, 且可沿 着所述直线轴承 16上下滑动, 起到缓冲作用; 所述直线轴承 16分两侧垂直支撑 在所述上固定板 14、 下固定板 15之间, 且所述上固定板 14、 下固定板 15位于所 述控制箱 1上方, 除用于承载施压装置外, 还可配合上压头 4、 下压头 3来夹持固 定的极片电阻; 所述施压装置通过下固定板 15安装在所述底座 2上方, 可在气缸 连杆 9和直线轴承 16等设备的导向作用下, 对夹持固定好的极片电阻施压并配合 电阻测量主板对其厚度变化值进行精确测量, 再通过气压调节阀 6测量在不同压 力下的电阻值。
[0045] 进一步地, 所述控制箱 1通过其内部各个组件的连接、 传输与工作控制实现简 易化操作; 其中, 所述控制主板通过连接气压调节阀 6与施压装置实现两者之间 的参数传输与控制; 所述电阻值测量主板通过数据处理能同时测量各种参数, 包括极片电阻、 厚度、 压力、 压强、 电导率、 电阻率, 可传输至控制主板并通 过液晶显示屏 7展示出来; 所述气压调压阀 6用于实现对活动气缸 8压力大小和移 动方向的调节, 其放置于控制箱 1的外侧也便于使用者的读数与操作; 所述液晶 显示屏 7通过数据线与压力传感器 5的连接显示当前参数, 便于使用者观察装置 当前动态;所述底座 2既是电气箱, 又是其他组件和设备的安装基础。
[0046] 优选地, 所述上压头 4与所述下压头 3采用铜材质制成, 且在表面进行了镀金工 艺处理, 且上压头 4和下压头 3都需尽量水平, 以保证受力均匀并提高测量精度
[0047] 优选地, 还包括保护箱体, 所述保护箱体设置在所述底座 2上, 并罩设所述施 压装置; 其中, 所述保护箱体的前侧设置有箱门, 所述箱门上设置有透明窗口
[0048] 其中, 如图 3所示, 所述保护箱体是一种安全保护装置, 可以对内置的仪器起 很好的保护作用, 减小内部设备的撞击、 摩擦或其他外力造成的损伤几率, 其 采用的材质较多, 可选用铝材质、 镀锌钢板等一些具有优良特性的壳体材质; 所述箱门及透明窗口设置于施压装置的外表面, 起到安全收放和实时情况监测 的作用, 所述透明窗口可采用一些常见的透明塑料材质等。
[0049] 优选地, 还包括与所述控制主板连接的温湿度传感器, 所述温湿度传感器设置 于所述保护箱体内, 且通过 IIC接口通信, 实现宽压供电。
[0050] 所述温湿度传感器可用于检测极片电阻测量仪内部的温度变化情况, 防止当温 度升高时, 各器件的性能随之下降, 且电路中所含会发热的半导体向空气中释 放热量会使环境温度升高, 使得散热效果减弱, 进一步导致半导体器件温度升 高, 影响设备正常运作, 而通过温湿度传感器对环境温度进行检测, 可以在温 度过高时进行提示并采取降温措施, 确保环境温度正常; 除此之外, 仪器所处 外界环境中的湿度也需保持在合适的范围内, 若空气相对湿度过低, 即空气过 于干燥时, 静电压会显著升高, 严重危害设备和人员安全;若空气湿度过高, 空 气中水蒸气容易在电路表面形成水膜, 造成电路飞弧现象。
[0051] 优选地, 还包括设置于所述控制箱 1底部的四个调节脚垫 17, 以通过所述调节 脚垫 17保证整体处于水平位置上, 在起到支撑作用的同时也利于操作者适当调 节测量仪箱体的高度。
[0052] 优选地, 还包括电源、 开关按钮 18及电磁阀 19, 所述开关按钮 18安装在控制箱 1上, 起到控制电源通断的作用; 所述电源及所述电磁阀 19均与所述控制主板电 气连接; 其中, 所述电磁阀 19是通过自身的通电与断电来改变气流方向, 从而 控制活动气缸 8的活塞做往复运动; 其中, 控制活动气缸 8动作的方式有多种, 本发明使用的电磁阀 19控制仅仅是其中的一种, 除此之外还可以选用手动控制 或者机械控制; 具体的做法是把电磁阀 19换成手柄操作的换向阀, 或者用机控 阀控制气控换向阀继而控制气缸运动, 其特点是控制系统为纯气动不涉及电路
[0053] 易于理解的是, 在不同的实施方式中, 本发明极片电阻测量仪的具体结构还可 以进行以下一种或多种变更: 1)各元件之间的固定连接可以通过螺钉实现, 也可 以通过其他合适的方式实现, 例如卡扣连接、 销孔连接等;
2)上压片 4和下压片 3可为两端都镶嵌磁铁, 或是其中一个镶嵌磁铁, 另一个镶嵌 能够被磁铁吸附的材料(如铁等), 只要能够彼此吸附而实现对极片电阻的夹持固 定即可; 3)某些元件的数量可以根据实际情况而有所变化, 并不会影响其功能的 实现, 如气缸连杆 9、 第一弹簧 10、 第二弹簧 13、 直线轴承 16和调节脚垫 17等。
[0054] 使用本实施例的极片电阻测量仪对极片电阻进行测试的步骤为:
[0055] 1)调零: 将气压调压阀 6的气体流量调至较低值, 启动电磁阀 19 , 使活动气缸 8 通过气缸连杆 9推动上活动板 11和下活动板 12—起缓缓下滑, 当上压头 4与下压 头 3接触后, 下活动板 12停止移动, 上活动板 11则继续下压, 直至压力传感器 5 与上压头 4的顶部接触, 此时, 液晶显示屏 7显示的压力值由零变为不为零; 使 活动气缸 8停止下压, 然后调低气压调压阀 6的气体流量, 直至液晶显示屏 7显示 的压力值降低为零, 并将电阻测量主板的数值也归零;
[0056] 2)测量: 气压调压阀 6接气完毕, 设备接好电源, 接好通信线, 打开电脑软件 , 通信正常, 设备及液晶显示屏 7—切正常; 启动电磁阀 19使活动气缸 8带动上 压头 4上移, 把箱门打开, 将极片电阻放置在上压头 4和下压头 3之间夹持固定, 并使极片电阻的待测量端伸出至下压头 3上方且与其顶部接触, 把箱门合上; 按 下开关按钮 18 , 启动电磁阀 19使活动气缸 8推动上压头 4下移而对极片电阻施加 压力, 并旋动气压调压阀 6旋钮, 逐渐增大气压, 直至液晶显示屏 7显示的压力 值达到预定的最大压力; 此过程中, PC软件上可设置一个测试过程重复测试, 或者单点测试, 如只需单点测试, 则待读取记录数据完成后, 按开关按钮 18, 把上压头 4抬上去, 一次测试完成; 其中, 记录通过极片电阻测量系统显示在液 晶显示屏 7上的极片电阻厚度变化值、 压力值以及电阻值等, 得到的控制参数采 用极片电阻电导率测试方法进行计算, 即通过计算电阻值共同趋于稳定的相对 时间结合最佳电导率对应的参考正向压强参数对极片电阻的不同位置进行测试 , 测得不同位置的准确的电导率的 RSD%;
[0057] 3)测量完毕后, 旋动气压调压阀 6旋钮降低气压, 并启动电磁阀 19使活动气缸 8 带动上压头 4上移, 关闭电源, 打开箱门取下极片电阻即可。
[0058] 综上所述, 本发明实施例提供的极片电阻测量仪, 可通过在现有技术上增加电 磁阀、 箱体并结合 PC端软件进行控制, 达到了更便于电阻值检测的目的, 且同 时查看测量仪内部工作情况, 改善了现有电阻测量仪的不足之处。
[0059] 本发明第二实施例还提供了一种极片电阻测量系统, 包括控制终端以及上述的 极片电阻测量仪, 所述控制终端通过串口与所述极片电阻测量仪的控制主板连 接; 其中:
[0060] 所述控制终端上安装有控制软件, 所述控制终端, 用于接收用户基于所述控制 软件的界面输入的控制参数, 并将所述控制参数发送给所述控制主板;
[0061] 所述控制主板, 用于基于所述控制参数控制所述气压调节阀的输出气压, 从而 实现对施压装置的施压的控制。
[0062] 其中, 如图 2所示, 所述控制主板所含的软硬件功能实现模块有: PC端软件、 压 力传感器 5与温湿度传感器、 电阻测量主板、 液晶显示屏 7、 施压装置、 气压调 节阀 6、 开关按钮 18与电磁阀 19; 其中, 所述 PC端软件通过串口连接控制主板并 将采集到的控制参数进行数据分析和图表展示, 所述压力传感器 5与温湿度传感 器均通过机械与电子连接将得到的控制参数传输至控制主板, 所述电阻测量主 板与控制主板共同工作, 其数字化接口获取需要的变量以进行极片性能分析, 所述液晶显示屏 7将控制主板的数据变化直观显示出来以提高使用效率, 所述施 压装置通过传动、 气动和电子技术将不同压力下所夹持的极片电阻进行测量和 差异性分析, 所述气压调节阀 6为控制主板的对比测试提供相应的压力、 压强参 数变化值, 所述开关按钮 18与电磁阀 19分别作用于控制主板的电源通断与活动 气缸 8的往复运动。
[0063] 优选地, 所述控制参数至少包括以下其中之一: 施加的压力、 施加压力的持续 时间、 施加压力的周期。
[0064] 请参阅图 3 , 本发明第三实施例还提供了一种极片电阻电导率测试方法, 其中 [0065] SI:在待测极片电阻的同一位置下, 采用 N个不同正向压强参数进行测试, 以 获得所述待测极片电阻在每个正向压强参数下的测试电阻值趋于稳定的 N个第一 相对时间; 其中, 对于每个正向压强参数, 每隔预定时间采集所述待测极片电 阻的测试电阻值, 并根据采集的多个测试电阻值获得测试电阻值趋于稳定的第 一相对时间;
[0066] S2:将获得的 N个第一相对时间的最大值作为所述待测极片电阻共同趋于稳定 的第二相对时间;
[0067] S3:在同一位置, 根据 M个不同的正向压强参数以及所述第二相对时间, 采集 所述待测极片电阻在不同正向压强参数下的 M个电导率值; 根据所述 M个电导率 值获取在该位置下的最佳电导率以及与所述最佳电导率相应的参考正向压强参 数;
[0068] S4:在不同位置, 根据所述参考正向压强参数以及第二相对时间, 采集所述待 测极片电阻在不同位置的电导率值, 以计算出不同位置下的电导率的 RSD%。
[0069] 其中, 所述电导率是用来描述物质中电荷流动难易程度的参数, 且电导率 o的 标准单位是西门子 /米 (简写做 S/m) , 为电阻率 p的倒数, 即 o=l/P ; 当 1安培电 流通过物体的横截面并存在 1伏特电压时, 物体的电导就是 1 S ; 西门子实际上等 效于 1安培 A伏特; 如果 o是电导 (单位西门子) , I是电流, E是电压, 则: cr = I/E;
[0070] 通常, 当电压保持不变时, 这种直流电电路中的电流与电导成比例关系; 如果 电导加倍, 则电流也加倍; 如果电导减少到它初始值的 1/10, 电流也会变为原来 的 1/10。
[0071] 本发明采用多种状态下的多次测量来获取最佳电导率和其 RSD%, 提高了测量 精度, 减小了实验误差, 更好地探寻其共同的物理规律, 同时研究了其不同状 态下的物理量, 为后研究提供可靠保障。
[0072] 本发明实施例测得的极片电阻的电导率影响着全电池的电阻, 且对电池的倍率 性能产生主要影响; 通过测量极片电阻, 可判断极片电阻中微观结构的均匀性 、 极片电阻配方特性、 材料性能及预测电池的性能; [0073] 进一步地, 电池极片中, 影响电导率的主要因素包括箔基材与涂层的结合界面 情况、 导电剂分步状态、 颗粒之间的接触状态等等。
[0074] 优选地, 步骤 S1中所述预定时间为 100ms; 所述测试电阻值为极片电阻测量仪 的内阻 R1、 上下压头的总电阻 R2和极片电阻 R3三者之和。
[0075] 优选地, 所述对于每个正向压强参数, 每隔预定时间采集所述待测极片电阻的 测试电阻值, 并根据采集的多个测试电阻值获得测试电阻值趋于稳定的第一相 对时间, 具体为:
[0076] S10:获取上下压头的总电阻 R2, 并放入待测极片电阻;
[0077] S11:在同一位置同一正向压强参数下测试, 每隔 100ms采集一个测试电阻值, 并将得到的测试电阻值与相对时间进行关联;
[0078] S12:计算得到当前测试电阻值与前一个测试电阻值的差值;
[0079] S13:若所得差值小于阈值, 则将与当前测试电阻值关联的相对时间设置为当前 正向压强参数下的第一相对时间,否则返回步骤 S12。
[0080] 其中, 所述步骤 S11在本实施例中采集数量为 50到 200个的测试电阻值, 再将这 些电阻值的差值与阈值相比较, 最终得到一组稳定的相对时间; 其中, 所述采 集的多个测试电阻保证了所获得的第一相对时间的精度。
[0081] 优选地, 所述 S3步骤具体为:
[0082] S30:在同一位置, 用 M个不同正向压强参数递推测试;
[0083] S31:获取上下压头的总电阻 R2, 放入极片电阻测试;
[0084] S32:在每个正向压强参数下, 获取到达第二相对时间时采集的电阻值和厚度值
, 同时算出相应电导率, 以得到当前正向压强参数下的电导率数据;
[0085] S33:判断 M个不同正向压强参数是否测试完毕; 若是, 执行步骤 S34; 若否, 则继续下一步骤 S35 ;
[0086] S34:在一组 M个电导率数据中查找出该位置的最佳电导率以及对应的参考正向 压强参数;
[0087] S35:更换正向压强参数, 并返回 S31。
[0088] 其中, 所述步骤 S30在本实施例中最先使用压强参数 Ml开始测试, 再获取 R2并 采集电阻值和厚度值以获得相应电导率, 待所有压强参数测试完, 便得到一组 最佳电导率以及对应的参考正向压强参数; 其中, 所述 M个不同正向压强参数递 推测试, 减小了因压强参数不同而对电导率和其相对标准偏差 RSD%的影响。
[0089] 优选地, 所述 S4步骤具体为:
[0090] S40:在 Y个不同位置参数下, 采用获取的参考正向压强参数进行测试;
[0091] S41:获取上下压头的总电阻 R2, 并放入极片电阻测试;
[0092] S42:等待共同趋于稳定的第二相对时间到达时采集电阻值和厚度值, 同时算出 相应电导率, 得到一组当前位置下的电导率数据;
[0093] S43:判断 Y个不同位置参数是否测试完毕; 若是, 执行步骤 S44; 若否, 则继 续下一步骤 S45 ;
[0094] S44:对一组 Y个电导率数据, 计算出电导率的 RSD%;
[0095] S45:更换位置参数, 并返回 S42。
[0096] 其中, 所述步骤 S41在本实施例中只需获取一次电阻 R2, 且使用位置参数 Y1开 始进行测试, 待所有位置参数测试完, 便得到一组电导率数据以及对应的相对 标准偏差 RSD%; 其中, 所述在 Y个不同位置参数下进行测试, 减小了因压强参 数不同而对电导率和其相对标准偏差 RSD%的影响;
[0097] 所述 RSD为相对标准偏差, 又称标准偏差系数、 变异系数、 变动系数等, 由标 准偏差除以相应的平均值乘 100%所得的值, 并用于在检验检测工作中分析结果 的精密度, 其计算公式 (1) 如下:
[0098]
Figure imgf000013_0001
[0099] 公式中 S为标准偏差, 是各个测量数据偏差的平方和除以数据个数减 1的平方根 , 其含有的对单个数据偏差平方, 将较大的偏差突出地反映出来, 所以通过标 准偏差能说明测量结果数据的离散程度;
X
为相应的平均值, 是通过多次测量的方法来得出一个准确的结果, 所测量数据 的算术平均值就能代表测量结果总体的平均水平。
[0100] 优选地, 所述极片电阻测量仪的内阻 R1获取的方法具体为: 将极片电阻测量 仪的探针短接, 测量的电阻值就是极片电阻测量仪的内阻 R1 ;
[0101] 所述上下压头的总电阻 R2获取的方法具体为: 将极片电阻测量仪的探针分别 与上压头 4和下压头 3连接, 上压头 4和下压头 3之间不安放极片电阻, 上压头 4和 下压头 3接触导通, 测量得到上压头 4和下压头 3的电阻值 R2;
[0102] 所述极片电阻的电阻值 R3获取的方法具体为: 将极片电阻安放在上压头 4和下 压头 3之间, 上压头 4受到压力挤压极片电阻, 读取测试仪的电阻减去极片电阻 测量仪的内阻值 R1和上压头 4和下压头 3总的电阻值 R2, 即可得到极片电阻的电 阻 R3
[0103] 优选地, 上压头 4和下压头 3接触面积固定不变。
[0104] 在本发明的描述中, 需要理解的是, 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”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发明和简化描述, 而不是指示或 暗示所指的部件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 不能理解为对本发明的限制。
[0105] 此外, 术语“第一”、 “第二”仅用于描述目的, 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。 由此, 限定有“第一”、 “第二”的特 征可以明示或者隐含地包括一个或者更多个该特征。 在本发明的描述中, “多个” 的含义是两个或两个以上, 除非另有明确具体的限定。
[0106] 在本发明中, 除非另有明确的规定和限定, 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; 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发明中的具 体含义。
[0107] 在本发明中, 除非另有明确的规定和限定, 第一特征在第二特征之“上”或之“ 下”可以包括第一和第二特征直接接触, 也可以包括第一和第二特征不是直接接 触而是通过它们之间的另外的特征接触。 而且, 第一特征在第二特征“之上”、 “ 上方”和“上面”包括第一特征在第二特征正上方和斜上方, 或仅仅表示第一特征 水平高度高于第二特征。 第一特征在第二特征“之下”、 “下方”和“下面”包括第一 特征在第二特征正下方和斜下方, 或仅仅表示第一特征水平高度小于第二特征
[0108] 以上所述仅为本发明的优选实施方式而已, 并不用于限制本发明, 对于本领域 的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之 内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内

Claims

权利要求书
[权利要求 1] 一种极片电阻测量仪, 其特征在于, 包括:
控制箱;
设置于所述控制箱上的底座;
设置于所述底座上的下压头;
安装于所述底座上的施压装置, 所述施压装置具有与所述下压头相对 设置的上压头, 以通过所述上压头对放置于所述下压头上的待测极片 电阻施加可变压力;
压力传感器, 设置于所述施压装置上, 用于获取待测极片电阻被施加 的压力;
其中, 所述控制箱包括控制主板、 与所述控制主板电气连接的电阻测 量主板、 气压调节阀以及液晶显示屏; 所述电阻测量主板与所述上压 头及下压头连接; 所述气压调节阀与所述施压装置连通。
[权利要求 2] 根据权利要求 i所述的极片电阻测量仪, 其特征在于, 所述施压装置 还包括活动气缸、 气缸连杆、 第一弹簧、 上活动板、 下活动板、 第二 弹簧、 上固定板、 下固定板以及直线轴承;
所述活动气缸的输出端与气缸连杆通过所述上固定板相连, 所述气缸 连杆经所述上活动板向下伸出, 所述第一弹簧分两侧套设于所述直线 轴承的位于下活动板以上的部分, 且可沿着所述直线轴承上下滑动, 起到缓冲作用; 所述上活动板以及所述下活动板分别位于所述第一弹 簧的上下两侧, 所述上压头安装在下活动板下方且与安装在所述下固 定板上方的下压头对齐;
所述第二弹簧分两侧套设于所述直线轴承的位于下活动板以下的部分 , 且可沿着所述直线轴承上下滑动, 起到缓冲作用; 所述直线轴承分 两侧垂直支撑在所述上固定板与下固定板之间, 且所述上固定板与下 固定板位于所述控制箱上方; 所述施压装置通过下固定板安装在所述 底座上方。
[权利要求 3] 根据权利要求 i所述的极片电阻测量仪, 其特征在于, 所述上压头与 所述下压头采用铜材质制成, 且在表面进行了镀金工艺处理。
[权利要求 4] 根据权利要求 1所述的极片电阻测量仪, 其特征在于, 还包括保护箱 体, 所述保护箱体设置在所述底座上, 并罩设所述施压装置; 其中, 所述保护箱体的前侧设置有箱门, 所述箱门上设置有透明窗口。
[权利要求 5] 根据权利要求 4所述的极片电阻测量仪, 其特征在于, 还包括与所述 控制主板连接的温湿度传感器, 所述温湿度传感器设置于所述保护箱 体内。
[权利要求 6] 根据权利要求 1所述的极片电阻测量仪, 其特征在于, 还包括设置于 所述控制箱底部的四个调节脚垫, 以通过所述调节脚垫保证整体处于 水平位置上。
[权利要求 7] 根据权利要求 1所述的极片电阻测量仪, 其特征在于, 还包括电源及 电磁阀, 所述电源及所述电磁阀均与所述控制主板电气连接。
[权利要求 8] 一种极片电阻测量系统, 其特征在于, 包括控制终端及如权利要求 1 至 7任意一项所述的极片电阻测量仪; 所述控制终端通过串口与所述 极片电阻测量仪的控制主板连接; 其中:
所述控制终端上安装有控制软件, 所述控制终端, 用于接收用户基于 所述控制软件的界面输入的控制参数, 并将所述控制参数发送给所述 控制主板;
所述控制主板, 用于基于所述控制参数控制所述气压调节阀的输出气 压, 从而实现对施压装置的施压的控制。
[权利要求 9] 根据权利要求 8所述的极片电阻测量系统, 其特征在于, 所述控制参 数至少包括以下其中之一: 施加的压力、 施加压力的持续时间、 施加 压力的周期。
[权利要求 10] 一种基于如权利要求 1至 7任意一项所述的极片电阻测量仪的极片电阻 测量方法, 其特征在于, 包括
S1:在待测极片电阻的同一位置下, 采用 N个不同正向压强参数进行 测试, 以获得所述待测极片电阻在每个正向压强参数下的测试电阻值 趋于稳定的 N个第一相对时间; 其中, 对于每个正向压强参数, 每隔 预定时间采集所述待测极片电阻的测试电阻值, 并根据采集的多个测 试电阻值获得测试电阻值趋于稳定的第一相对时间;
S2:将获得的 N个第一相对时间的最大值作为所述待测极片电阻共同 趋于稳定的第二相对时间;
S3:在同一位置, 根据 M个不同的正向压强参数以及所述第二相对时 间, 采集所述待测极片电阻在不同正向压强参数下的 M个电导率值; 根据所述 M个电导率值获取在该位置下的最佳电导率以及与所述最佳 电导率相应的参考正向压强参数;
S4:在不同位置, 根据所述参考正向压强参数以及第二相对时间, 采 集所述待测极片电阻在不同位置的电导率值, 以计算出不同位置下的 电导率的 RSD%。
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