CN204166076U - A kind of Multifunction silicon controlled tester being applied to big current rectifying installation - Google Patents
A kind of Multifunction silicon controlled tester being applied to big current rectifying installation Download PDFInfo
- Publication number
- CN204166076U CN204166076U CN201420603463.2U CN201420603463U CN204166076U CN 204166076 U CN204166076 U CN 204166076U CN 201420603463 U CN201420603463 U CN 201420603463U CN 204166076 U CN204166076 U CN 204166076U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- resistor
- output
- module
- thyristor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 7
- 229910052710 silicon Inorganic materials 0.000 title claims description 7
- 239000010703 silicon Substances 0.000 title claims description 7
- 238000009434 installation Methods 0.000 title 1
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 37
- 239000003381 stabilizer Substances 0.000 claims description 17
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Rectifiers (AREA)
Abstract
本实用新型公开了一种应用于大电流整流设备的多功能可控硅测试仪，包括4―20mA和0―5v信号调节模块、可控硅测试模块，所述的可控硅测试模块与4―20mA和0―5v信号调节模块集成在一起共用一个电源模块；本实用新型实现了可控硅元件的不拆卸快速准确检测，实现了4――20mA电流信号和0――5v电压信号的连续可调输出，本实用新型轻便、便于携带，易于检修人员在现场对整机的可控硅元件和控制信号进行快速准确的检测调试，以提高检修质量和调试精度，缩短停机时间，提高用户设备的生产效率和经济效益。
The utility model discloses a multifunctional thyristor tester applied to large-current rectification equipment, which comprises a 4-20mA and 0-5v signal adjustment module and a thyristor test module. The thyristor test module and 4 The ―20mA and 0―5v signal adjustment modules are integrated together and share a power module; the utility model realizes the rapid and accurate detection of the thyristor element without disassembly, and realizes the continuation of the 4―20mA current signal and the 0―5v voltage signal Adjustable output, the utility model is light and easy to carry, and it is easy for maintenance personnel to quickly and accurately detect and debug the thyristor components and control signals of the whole machine on site, so as to improve the quality of maintenance and debugging accuracy, shorten downtime, and improve user equipment. production efficiency and economic benefits.
Description
技术领域 technical field
本实用新型涉及大电流整流器元件的快速检测和控制信号的调试装置，具体涉及一种应用于大电流整流设备的多功能可控硅测试仪。 The utility model relates to a debugging device for rapid detection and control signals of large-current rectifier components, in particular to a multifunctional thyristor tester applied to high-current rectifier equipment. the
背景技术 Background technique
可控硅整机的核心部件有可控硅元件和控制板，由于整机采用多元件并联的安装方式，目前对可控硅元件的检测方法是用万用表分别测量A（阳极）、K（阴极）、G（控制极）三个极之间的阻值，用其之间的阻值来粗略判断。A分别和对K、G之间的正、反向阻值都为无穷时，可认为元件无击穿现象；K和G之间的阻值在10-30欧之间可认为触发极无故障；用这种测试方法所存在的问题，就是没有真正利用可控硅的工作特性去判断，比如，在A和K之间加上正向直流电压，G和K上瞬间加上足够的触发电压，可使可控硅处于保持导通状态。由此可看出，如果A和K之间发生断路现象，用万用表是无法判断其好坏的。不能准确判断元件的状态是否良好，除非将元件一一拆下分别检测，工作量很大。另外，整机控制板的输入输出信号为4――20mA的电流信号或者是0――5v的电压信号，这些信号都要经过隔离变送器来传输，对这些信号的调试由于没有专用的信号发生器无法保证调试精度。 The core components of the thyristor complete machine include the thyristor element and the control board. Since the entire machine is installed in parallel with multiple elements, the current detection method for the thyristor element is to measure A (anode) and K (cathode) respectively with a multimeter. ), G (control pole) The resistance value between the three poles can be roughly judged by the resistance value between them. When the forward and reverse resistance values between A and K and G are infinite, it can be considered that there is no breakdown of the component; the resistance between K and G is between 10-30 ohms, and it can be considered that there is no fault in the trigger pole. ;The problem with this test method is that it does not really use the working characteristics of the thyristor to judge, for example, add a positive DC voltage between A and K, and add enough trigger voltage to G and K instantaneously , can keep the thyristor in the conduction state. It can be seen from this that if there is an open circuit between A and K, it is impossible to judge whether it is good or bad with a multimeter. It is impossible to accurately judge whether the components are in good condition, unless the components are removed one by one and tested separately, the workload is very heavy. In addition, the input and output signals of the control board of the whole machine are 4-20mA current signals or 0-5v voltage signals. These signals must be transmitted through the isolation transmitter. There is no dedicated signal for debugging these signals Generators cannot guarantee debugging accuracy. the
实用新型内容 Utility model content
本实用新型的目是为了克服上述的不足，提供了一种应用于大电流整流设备的检测调试仪。 The purpose of this utility model is to provide a detection and debugging instrument applied to large current rectification equipment in order to overcome the above-mentioned deficiencies.
本实用新型的目的是通过以下方式实现的。 The purpose of this utility model is achieved in the following ways.
一种应用于大电流整流设备的多功能可控硅测试仪，包括0―5v信号调节模块、可控硅测试模块，所述的可控硅测试模块与0―5v信号调节模块集成在一起共用一个电源模块； A multifunctional thyristor tester applied to large current rectification equipment, comprising a 0-5v signal adjustment module and a thyristor test module, the thyristor test module and the 0-5v signal adjustment module are integrated and shared a power module;
所述的电源模块由输入220v，输出18v，7.5v的变压器，与该变压器相接的两桥式整流器， 与一桥式整流器相接的7805稳压器、与另一桥式整流器相接的7815稳压器组成；所述稳压器7815的输入端并联电容C2，输出端并联有滤波电容C4，所述稳压器7805的输入端并联电容C1，输出端并联有输出端滤波电容C3； Described power module is by the transformer of input 220v, output 18v, 7.5v, two bridge rectifiers connected with this transformer, 7805 voltage stabilizer connected with one bridge rectifier, and another bridge rectifier connected Composed of 7815 voltage regulators; the input end of the voltage stabilizer 7815 is connected in parallel with a capacitor C2, the output end is connected in parallel with a filter capacitor C4, the input end of the voltage stabilizer 7805 is connected in parallel with a capacitor C1, and the output end is connected in parallel with an output end filter capacitor C3;
所述的可控硅测试模块包括阴极K表笔线、阳极A表笔线和控制级G表笔线，阳极A表笔线与一发光二极管相接，该发光二极管与一电阻R2串联，一电阻R1与发光二极管和与其串联的电阻R2并联后与电源模块的电容C3的正极相接，控制级G表笔线与一电阻R3的一端相接，电阻R3的另一端与电容C3的正极相接，阴极K表笔线接地； The thyristor test module includes cathode K test lead line, anode A test lead line and control level G test lead line, the anode A test lead line is connected to a light-emitting diode, the light-emitting diode is connected in series with a resistor R2, and a resistor R1 is connected to the light-emitting diode. The diode and the resistor R2 in series with it are connected in parallel with the positive electrode of the capacitor C3 of the power module, the control level G meter lead is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive electrode of the capacitor C3, and the cathode K meter lead wire ground;
所述的0―5v的信号调节模块包括三极管，该三极管的基极分别与电阻R5的一端、滑动变阻器R4的一端相接，滑动变阻器的另一端为滑动端，该端分别与三极管集电极、电容C3的正极相接，电阻R5的另一端接地，电阻R5的另一端还与一电阻R6的一端相接，电阻R6的另一端与三极管的发射极相接后为信号输出端； The 0-5v signal conditioning module includes a triode, the base of the triode is respectively connected to one end of the resistor R5 and one end of the sliding rheostat R4, and the other end of the sliding rheostat is a sliding end, which is respectively connected to the collector of the triode, The positive poles of the capacitor C3 are connected, the other end of the resistor R5 is connected to the ground, the other end of the resistor R5 is also connected to one end of a resistor R6, and the other end of the resistor R6 is connected to the emitter of the triode to be the signal output end;
所述的0―5v的信号调节模块输出端与一个0―5v转4-20mA的变送器相接，所述电源模块电容C4的正极与该变送器相接。 The output end of the 0-5v signal adjustment module is connected with a 0-5v to 4-20mA transmitter, and the positive pole of the capacitor C4 of the power supply module is connected with the transmitter.
所述的稳压器7805的输出端并联的输出端滤波电容C3，电容C3的负极与稳压器7805的接地引脚相接，电容C3的正极与稳压器7805的输出引脚相接，所述的稳压器7815的输出端并联的输出端滤波电容C4，电容C4的负极与稳压器7815的接地引脚相接，电容C4的正极与稳压器7815的输出引脚相接。 The output end of the voltage stabilizer 7805 is connected in parallel with the output filter capacitor C3, the negative pole of the capacitor C3 is connected to the ground pin of the voltage stabilizer 7805, and the positive pole of the capacitor C3 is connected to the output pin of the voltage stabilizer 7805. The output end of the voltage stabilizer 7815 is connected in parallel with the output filter capacitor C4, the negative pole of the capacitor C4 is connected to the ground pin of the voltage stabilizer 7815, and the positive pole of the capacitor C4 is connected to the output pin of the voltage stabilizer 7815.
所述的电源模块使用内置电池和稳压器7805、稳压器7815来替代。 The power supply module is replaced by a built-in battery and a voltage regulator 7805 and a voltage regulator 7815.
本实用新型的有益效果是：1、实现了可控硅元件的不拆卸快速准确检测；2、实现了4――20mA电流信号和0――5v电压信号的连续可调输出；3、将可控硅元件的检测和整机控制板的信号调试模块集成在一起，检测调试方便可靠； 4.本实用新型轻便、便于携带，易于检修人员在现场对整机的可控硅元件和控制信号进行快速准确的检测调试，以提高检修质量和调试精度，缩短停机时间，提高用户设备的生产效率和经济效益。 The beneficial effects of the utility model are as follows: 1. Realize fast and accurate detection of the silicon controlled rectifier element without disassembly; 2. Realize the continuous adjustable output of 4-20mA current signal and 0-5v voltage signal; 3. The detection of the silicon controlled element and the signal debugging module of the control board of the whole machine are integrated together, and the detection and debugging are convenient and reliable; Fast and accurate detection and debugging to improve the quality of maintenance and debugging accuracy, shorten downtime, and improve the production efficiency and economic benefits of user equipment.
附图说明 Description of drawings
图1.本实用新型结构示意图； Fig. 1. structural representation of the utility model;
图2本实用新型电源模块结构示意图； Fig. 2 is a structural schematic diagram of the power supply module of the utility model;
图3本实用新型0-5V可调模拟量输出模块原理图； Fig. 3 schematic diagram of the utility model 0-5V adjustable analog output module;
图4本实用新型4-20mA可调模拟量输出模块原理图； Fig. 4 schematic diagram of the utility model 4-20mA adjustable analog output module;
图5本实用新型可控硅免拆卸测试原理图。 Fig. 5 is a schematic diagram of the utility model thyristor without disassembly test.
具体实施方式 Detailed ways
如图1、2所示，本实用新型采用一个输入220v，输出18v，7.5v的变压器，两个桥式整流电路和稳压器7805、稳压器7815的集成电路构成电源部分，也可使用内置电池通过7805，7815的稳压来工作；所述稳压器7815的输入端并联电容C2，输出端并联有滤波电容C4，所述稳压器7805的输入端并联电容C1，输出端并联有输出端滤波电容C3；整个测试仪的电源模块为公共部分由5V稳压和15V稳压电路构成。5V电源为主要部分，用于可控硅测试、电压模拟量、电流模拟量、固定5V输出。15V电源专门用于变送器工作电源。可控硅测试模块包括阴极K表笔线、阳极A表笔线和控制级G表笔线，阳极A表笔线与一发光二极管相接，该发光二极管与一电阻R2串联，一电阻R1与发光二极管和与其串联的电阻R2并联与电源模块的电容C3的正极相接，控制级G表笔线与一电阻R3的一端相接，电阻R3的另一端与电容C3的正极相接，阴极K表笔线接地；所述0―5v的信号调节模块包括三极管，该三极管的基极分别与电阻R5的一端、滑动变阻器R4的一端相接，滑动变阻器的另一端为滑动端，该端分别与三极管集电极、电源模块C3的正极相接，电阻R5的另一端接地，电阻R5的另一端还与电阻R6的一端相接，同时电阻R6的一端接地，电阻R6的另一端与三极管的发射极相接后引出电压（或电流）信号输出端；所述的0―5v的信号调节模块的信号输出端与一个0―5v转4-20mA的变送器相接，该变送器与所述电源模块电容C4的正极相接。 As shown in Figures 1 and 2, the utility model adopts a transformer with an input of 220v and an output of 18v and 7.5v, two bridge rectifier circuits and the integrated circuit of the voltage stabilizer 7805 and the voltage stabilizer 7815 to form the power supply part, which can also be used The built-in battery works through the voltage stabilization of 7805 and 7815; the input terminal of the voltage stabilizer 7815 is connected in parallel with capacitor C2, and the output terminal is connected in parallel with filter capacitor C4; the input terminal of the voltage stabilizer 7805 is connected in parallel with capacitor C1, and the output terminal is connected in parallel with The output filter capacitor C3; the power supply module of the whole tester is a common part and is composed of a 5V voltage regulator and a 15V voltage regulator circuit. The 5V power supply is the main part, used for SCR testing, voltage analog, current analog, and fixed 5V output. The 15V power supply is specially used for the working power supply of the transmitter. The thyristor test module includes cathode K test lead line, anode A test lead line and control level G test lead line, the anode A test lead line is connected with a light-emitting diode, the light-emitting diode is connected in series with a resistor R2, and a resistor R1 is connected with the light-emitting diode and its The resistor R2 connected in series is connected in parallel with the positive electrode of the capacitor C3 of the power module, the control level G meter lead is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive electrode of the capacitor C3, and the cathode K meter lead is grounded; The 0-5v signal adjustment module includes a triode, the base of the triode is respectively connected to one end of the resistor R5 and one end of the sliding rheostat R4, and the other end of the sliding rheostat is a sliding end, which is respectively connected to the collector of the triode and the power module. The positive pole of C3 is connected, the other end of resistor R5 is connected to ground, the other end of resistor R5 is also connected to one end of resistor R6, and one end of resistor R6 is connected to ground, and the other end of resistor R6 is connected to the emitter of the triode to draw out the voltage ( or current) signal output terminal; the signal output terminal of the 0-5v signal conditioning module is connected to a 0-5v to 4-20mA transmitter, which is connected to the positive pole of the capacitor C4 of the power supply module connect.
可控硅元件测试：如图5所示，KP3000-5,将仪器的A,K,G端通过测试线于元件的A,K,G端对应连接，接通仪器电源，此时仪器的发光二极管点亮，断开G端连线，发光二极管不灭，说明可控硅元件导通正常，再断开A端连线，发光二极管熄灭，再次接通A端，发光二极管不亮，说明可控硅元件关断正常，通过这样测试即可快速判断可控硅元件的好坏。 Thyristor component test: As shown in Figure 5, KP3000-5, connect the A, K, and G terminals of the instrument to the A, K, and G terminals of the component through the test line, and turn on the power supply of the instrument. At this time, the light of the instrument The diode lights up, disconnect the G terminal connection, the light emitting diode does not go out, indicating that the thyristor element conduction is normal, then disconnect the A terminal connection, the light emitting diode goes out, connect the A terminal again, the light emitting diode does not light up, indicating that it can The thyristor element is turned off normally, and through this test, the quality of the thyristor element can be quickly judged.
控制电压信号调试：大电流传感器的反馈信号0―5v，隔离变送器输入0―5v，输出4――20mA将本实用新型的电压信号输出端与变送器的输入端正负对应连接，变送器输出端接毫安电流表，调整仪器的可调电位器，分别读取1v，2v，3v，4v，5v时输出端的电流值，通过计算可判断处变送器的输出与输入信号是否正确。否则对变送器进行调整。模块原理如图3所示，0-5V电压模拟量可调输出模块，实测输出为0-4.6V连续可调。可满足一般模拟量的要求。当调节R4时，在R5上分得的电压和电流发生了变化，通过Q1放大，可实现Q1多关断到全导通状态的连续可调，即0-5V，但由于存在Q1管压降0.3V的理论值，所以，理论输出为0-4.7V，实测为0-4.6V可调。 Control voltage signal debugging: the feedback signal of the large current sensor is 0-5v, the input of the isolation transmitter is 0-5v, and the output is 4-20mA. Connect the output terminal of the transmitter to a mA ammeter, adjust the adjustable potentiometer of the instrument, and read the current values at the output terminal at 1v, 2v, 3v, 4v, and 5v respectively. Through calculation, it can be judged whether the output and input signals of the transmitter are correct. . Otherwise adjust the transmitter. The principle of the module is shown in Figure 3. The 0-5V voltage analog output module is adjustable, and the measured output is continuously adjustable from 0-4.6V. It can meet the requirements of general analog quantity. When R4 is adjusted, the voltage and current shared by R5 have changed, and through Q1 amplification, the continuous adjustment of Q1 from multi-off to full-on state can be realized, that is, 0-5V, but due to the voltage drop of Q1 tube The theoretical value of 0.3V, so the theoretical output is 0-4.7V, and the measured value is 0-4.6V adjustable.
控制电流信号调试：整机冷却水温度信号4――20mA，隔离变送器输入4――20mA，输出4――20mA，将本实用新型的电流信号输出端与变送器的输入端对应连接，变送器输出端接毫安电流表，调整仪器的可调电位器，分别读取4mA，10mA，16mA，20mA时输出端的电流值，与输入端电流值一一对比，即可判断处变送器的变比是否正确，否则对变送器进行调整。模块原理如图4所示，4-20mA模拟量可调输出模块此模块主要用0-5V的可调模块，后加一个0-5V转4-20mA的变送器。在调节0-5V电压的同时，变送器同时跟随4-20mA的电流输出。 Control current signal debugging: the cooling water temperature signal of the whole machine is 4-20mA, the input of the isolation transmitter is 4-20mA, and the output is 4-20mA, and the output terminal of the current signal of the utility model is correspondingly connected with the input terminal of the transmitter , The output terminal of the transmitter is connected to the mA ammeter, adjust the adjustable potentiometer of the instrument, read the current value of the output terminal at 4mA, 10mA, 16mA, and 20mA respectively, and compare it with the current value of the input terminal one by one to judge where the transmitter is located. Check whether the transformation ratio of the transmitter is correct, otherwise adjust the transmitter. The principle of the module is shown in Figure 4. The 4-20mA analog output module is mainly an adjustable 0-5V module, followed by a 0-5V to 4-20mA transmitter. While adjusting the 0-5V voltage, the transmitter simultaneously follows the 4-20mA current output.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420603463.2U CN204166076U (en) | 2014-10-17 | 2014-10-17 | A kind of Multifunction silicon controlled tester being applied to big current rectifying installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420603463.2U CN204166076U (en) | 2014-10-17 | 2014-10-17 | A kind of Multifunction silicon controlled tester being applied to big current rectifying installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204166076U true CN204166076U (en) | 2015-02-18 |
Family
ID=52539753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420603463.2U Expired - Lifetime CN204166076U (en) | 2014-10-17 | 2014-10-17 | A kind of Multifunction silicon controlled tester being applied to big current rectifying installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204166076U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9976470B2 (en) | 2014-12-05 | 2018-05-22 | Caterpillar Inc. | Aftertreatment module having replaceable catalyst housing |
| CN108646128A (en) * | 2018-04-27 | 2018-10-12 | 杭州中安电子有限公司 | Bridge heap high temperature reverse bias ageing system |
-
2014
- 2014-10-17 CN CN201420603463.2U patent/CN204166076U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9976470B2 (en) | 2014-12-05 | 2018-05-22 | Caterpillar Inc. | Aftertreatment module having replaceable catalyst housing |
| CN108646128A (en) * | 2018-04-27 | 2018-10-12 | 杭州中安电子有限公司 | Bridge heap high temperature reverse bias ageing system |
| CN108646128B (en) * | 2018-04-27 | 2020-07-17 | 杭州中安电子有限公司 | Bridge rectifier high-temperature reverse-bias aging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107422179B (en) | Novel power supply sampling circuit, power supply sampling method and low voltage circuit breaker thereof | |
| CN102636723A (en) | Secondary cable checking method for transformer substation | |
| CN109617038A (en) | A kind of input protection circuit of multrirange voltage collecting device | |
| CN107402324A (en) | Power supply sample circuit, method and its low-voltage circuit breaker based on single electric current transformer | |
| CN205679732U (en) | A kind of great current impact test device | |
| CN204166076U (en) | A kind of Multifunction silicon controlled tester being applied to big current rectifying installation | |
| CN203705526U (en) | Voltage polarity judgment circuit and system | |
| CN204945296U (en) | A kind of cellular phone data line tester | |
| CN206710527U (en) | A kind of PCB layout short circuit tester | |
| CN205562731U (en) | Diode breakdown voltage test circuit | |
| CN204881767U (en) | Measure device and car of fuel liquid level | |
| CN203587756U (en) | Silicon controlled rectifier on-line detection device | |
| CN220043218U (en) | A self-extracting energy and current sampling circuit and equipment for current transformer | |
| CN207424160U (en) | Utilize the device of conducting wire location of short circuit on constant-current source positioning line fault plate | |
| CN207096322U (en) | Power supply sample circuit and its low-voltage circuit breaker based on single electric current transformer | |
| CN207096321U (en) | New power supply sample circuit and its low-voltage circuit breaker | |
| CN203566108U (en) | Output current detection circuit of inverter welder based on alternating current signal | |
| CN103612039A (en) | Inverter welder output current detecting circuit based on AC signal and detecting method | |
| CN204731304U (en) | High internal resistance AC/DC universal voltage table | |
| CN203643520U (en) | Optoelectronic coupler fault detector | |
| CN203490311U (en) | Two-stage filter detection circuit | |
| CN204705684U (en) | A kind of electronic cigarette host test tool | |
| CN203101601U (en) | Lithium battery capacity simple and fast testing circuit | |
| CN207780155U (en) | A kind of portable CT polarity testers based on pulse circuit | |
| CN203950450U (en) | A kind of solution conductivity display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240207 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150218 |
|
| CX01 | Expiry of patent term |