Research and design of 18650 3.7v battery and panel testing solutions

　　1. Test to measure the internal resistance and voltage of 18650 3.7v batterys and panels

　　Through the high-speed, high-precision and stable measurement of the battery internal resistance tester (AC microresistance meter 3560, 3561), it can meet the measurement of small voltage changes during the battery aging test.

　　2. Testing of battery panel contacts

　　The battery board is composed of small battery board connections. At this time, the resistance of the battery and the battery connection node will be tested. We can provide a 3541 DC microresistance meter for testing.

　　3. Solar battery DC high current charging and discharging capacity and power

　　By setting the accumulation time and setting the power meter rectification mode to DC for accumulation, the charging and discharging capacity and power of the solar battery can be obtained. Our AC/DC single-phase power meters 3334 and 3334-01 can perform this measurement.

　　For example, for a car powered by 18650 3.7v batterys, the amount of electricity that the 18650 3.7v batterys on the car can convert into will affect how long the car can drive. Therefore, it is very critical to test the charge and discharge capacity and power.

　　4. Evaluate the energy efficiency of power conditioners for solar power generation

　　Power conditioner → device that converts DC to AC*

　　*Photovoltaic Systems – Power Conditioners – Steps for Measuring Energy Efficiency

　　Optoelectronic systems measure the energy efficiency of power conditioners

　　Energy efficiency = output/input

　　As shown in the figure above, the following power parameters can be directly viewed through the power analyzer 3390 (4 channels):

　　Junior (DC)

　　●Voltage, current, power, pulsation rate (JIS only)

　　Secondary = Output (50/60Hz or DC)

　　●Voltage, current, power, power factor, distortion rate, ripple rate (for DC output, JIS only)

　　●Overall assessment of primary and secondary

　　●Efficiency, loss

　　In addition to checking the electrical parameters, you also need to check the instantaneous waveform changes at the regulator output to make characteristic judgments. This is mainly to check whether there are any abnormal conditions at the moment. According to the waveform recorded by high-speed sampling, it can more intuitively reflect the situation at that time, so the sampling speed needs to be higher than the general 10ms sampling, so at this time, a multi-channel A storage recorder with a high-speed sampling rate records the instantaneous changes in voltage, current, and temperature. The 8870-21 is more portable. Due to the battery provided, it is more suitable for simple troubleshooting on site. The 8860-51 is more suitable for laboratories and other sites.

　　8870-21 Portable Storage Recorder

　　●Handheld, easy to operate

　　●Directly measure 2 analog signals (such as voltage or current) at the same time

　　●High-speed sampling

　　8860-51 storage recorder

　　●High-speed sampling

　　●Multiple channels are recorded simultaneously, and the module has rich functions

　　5. Temperature is related to the electrical characteristics of 18650 3.7v batterys and panels

　　Temperature has a great impact on 18650 3.7v batterys and panels, and will directly affect the output power of the battery or panel. Therefore, it is necessary to measure the reference battery while measuring the temperature. Use a reference cell to calibrate the efficiency of the light source applied by the 18650 3.7v battery or panel. The 84300-21 is more portable. Due to the battery provided, it is more suitable for simple troubleshooting on site. The 8430 is more suitable for laboratories and other sites.

　　8423 Storage Data Logger

　　●High speed → fastest 10ms cycle

　　●Multi-channel→up to 600 channels (all channels simultaneously 10ms/S)

　　●High withstand voltage, good insulation and good anti-interference performance

　　●Rich modules → temperature/voltage unit 8948; general unit 8949; digital/pulse unit 8996; alarm unit 8997

　　8430 Handheld Data Logger

　　●Handheld and easy to operate

　　●10 channels, 10ms (the sampling rate can reach 10ms when all channels are used at the same time)

　　●High-definition display screen, while recording data, monitor the trend chart on the machine

　　6. Insulation withstand voltage test of 18650 3.7v batterys

　　In the DC voltage withstand test, the current value can be set to meet the electrical safety inspection requirements based on the pV coefficient.

　　The output terminal of the short-circuited 18650 3.7v battery module is connected to the positive terminal of the DC insulation tester. Connect the exposed metal part of the module to the negative terminal of the test machine.

　　●Insulation withstand voltage tester 3153, can be tested directly in the laboratory

　　●Insulation resistance meter 3455-20, a portable insulation tester, can measure TΩ level products

　　●Super insulation meter SM and DSM series can be used to test 18650 3.7v battery thin films and evaluate photoelectric conversion rate. The test level can reach 10 16 Ω.

　　7. Evaluate the power generation quality of 18650 3.7v batterys and panels

　　Regardless of the energy situation, the power quality of the electricity sent needs to be checked. These include voltage, current, frequency deviation, harmonics, etc. Of course, 18650 3.7v batterys and panels also need to check the power quality in this regard, which can be monitored through relevant power quality analyzers.

　　Through the 3197 and 3196 power quality analyzers, you can view the relevant power quality and the flow from the equipment back to the grid.

　　Attached: Wind power generation information

　　Introduction to wind power generation

　　1. Regarding wind power generation, the current domestic power generation is generally 1.5MW-2MW.

　　2. The general process of wind power generation, wind blades——gear machine——generator---------inverter------690V/50Hz (grid), what needs to be tested is Generator and frequency converter parts.

　　3. Mainly measure the current, voltage and power of the wind turbine and frequency converter.

　　Products and advantages that Hioki can provide

　　A. 3390 Power Analyzer

　　1. There are many external interface methods and diversified storage modes.

　　2. It has good portability and can be used in conjunction with 4 units. The rotor and stator can be tested together at the same time. Two 3390s are required for use together.

　　3. Dynamic characteristics of the motor. Customers are more concerned about the current situation.

　　4. Equipped with corresponding sensors, the torque and rotation speed can be tested at the same time.

　　5. The maximum input voltage can reach 1500V.

　　6. Broadband measurement of AC/DC can meet the measurement needs of generators and at the same time meet the measurement of frequency converters.

　　7. Harmonic measurement up to 100 times.

　　8. With a sampling rate of 500kS/s, if paired with a recorder, it can record voltage and current waveforms.

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