fixture

The single clamp is divided into 32 heating plates, and there are heat insulation measures between the heating plate and the clamp. Each layer of heating board is equipped with a temperature probe, PLC can inspect the temperature probe of each layer of heating plate, and display the temperature detection value on the touch screen.

Control mode

PLC control is implemented for the equipment: it can set the heating target temperature, and the equipment can control the heating plate according to the target temperature, and timely protect and alarm when the heating plate is over temperature.

Heating temperature

The temperature control range is room temperature ~ 90 ℃, temperature control accuracy of each layer of heating plate is ± 2 ℃; the temperature rises to 60 ℃ and the temperature rise time is within 10min.

pressure control

The multi-stage pressure control is realized by the proportional valve (up to 5 sections can be set). When the input pressure of the air source reaches 0.6MPa, the maximum pressure value of each set of clamp group shall not be less than 5000kg.f; the adjustable pressure range of each set of clamp group shall be 200kg.f-5000kg.f; the pressure accuracy shall be ± 1%, and the pressure accuracy shall be ± 10kg.f when the pressure is less than 1000kg.f. Pressure accuracy ± 20kg.f when the pressure is 1000-5000kg.f

Clamp connection

The hot pressing clamp adopts the four wire method to measure the current and voltage of the core, and the circuit between the clamp and the charging and discharging power supply is connected. The electrode plate is installed on the heating plate of the clamp. The heating plate clamps the battery, and realizes the quick and reliable connection between the electrode plate and the electric core electrode ear. The surface of the electrode plate is gilded and the contact with the electrode lug is guaranteed.

Fixture change

When replacing batteries with different thickness, it is not necessary to replace the pressure block.

When changing batteries with different width and size, it is necessary to manually change the specification of clear sheet paper (Mylar film).

Setting range of charging and discharging power supply voltage

Charging voltage setting range: 0mV ~ 4500mv (resolution 0.1mv).

Discharge voltage setting range: 2000mv ~ 5000mv (resolution 0.1mv).

Charge discharge current setting range: 20mA ~ 20000ma (resolution 1mA).

Measurement and control accuracy of charging and discharging power supply

Voltage measurement control accuracy: ± (0.05% Rd + 0.05% FS).

Current measurement control accuracy: ± (0.1% Rd + 0.1% FS).

Time measurement control accuracy: ± 0.01%

Comprehensive energy conversion rate of equipment power supply

≥ 70%

Main functions of the software

1. The end conditions of each process of limiting time, limiting voltage and limiting current are controlled accurately.

1) Constant current charging end condition (CCC): the end conditions are voltage, time and capacity.

2) Constant voltage charging end condition (CVC): the end conditions are current, time and capacity.

3) Discharge end condition: constant current discharge (DC) end condition is voltage, time or capacity.

2. The charge capacity and energy parameters were calculated.

3. Charge and discharge process editing and management function.

1) Up to 64 step parameters can be set.

2) Up to 256 cycles can be set.

3) Each step can be selected by constant current charging, constant current and constant voltage charging, shelving, constant current discharging, cycling and other attributes.

4) The edited process files can be saved for future use.

4. the charging current can be set from (20-20000) MA, the charging voltage can be set from (0-5000) MV, the discharge voltage can be set from (2000-5000) MV, and the time of each step can be set from 0-9999 min / step.

5. curve display: it can draw the dynamic curve of each battery formation process in real time, including voltage time curve, current time curve, capacity time curve, energy time curve and capacity voltage curve. It can save all the working step curves of each battery (including voltage time, current time, capacity time, electricity time, etc.). The storage conditions of the curve points include voltage difference (≥ 5mv), current difference (≥ 5mA), time difference (≥ 1min), etc. the user can freely choose the sampling conditions of the curve; the curve can be locally enlarged and reduced, the coordinates can be adjusted, and the curve can be displayed and printed Specific data, that is, the time, voltage, current, capacity and electricity of each curve point.

6. chemical data storage: the software can save the corresponding data for more than 30 days, the software scanning frequency is less than 30s, the scanning value is taken every 2 minutes to save, and the value time can be set by itself. According to the voltage and current display curve, the software can view the detailed data of the battery, and the battery displays different colors in different states.

7. Software security control:

1) The data and curve of each point can be saved automatically after the set work step is completed, and the data and curve of each point can be exported in word and excel formats (see the attachment for the export format). The data shall not be lost within 4 hours after offline, and the software has over capacity alarm function;

2) Data saving format: it should be saved in its own format and mdb format, and a cell code field should be added after the cell number;

3) Overcharge protection in constant voltage stage: when the voltage exceeds the set value of overcharge protection, the flow of the channel is stopped, and the set value can be set;

4) Capacity out of tolerance protection: when the capacity of the cell exceeds a certain range, the flow of the channel will be stopped. The current setting conditions are: the capacity of the set flow * 1.35 times;

5) Battery reverse connection protection: set the initial voltage and its proportion of the cell. If the initial voltage does not reach the proportion, the upper computer will display that there is no battery and the operation process will not be carried out.

8. Create new monitoring, open, close document, print and setting functions.

9. Classification setting and startup.

10. Create a new window, arrange the icons, and display them in layers.

11. The formed battery can be sorted and equipped with indicator light. The sorting mode can be set as follows: capacity, time, open circuit voltage, average voltage, fixed-point voltage, etc.

12. The charge and discharge data of each battery can form a data list for users to view or print out.

13. The software has the function of precision calibration (used with calibration tooling), and the calibrated parameters can be sent down to the equipment for saving.

14. The upper and lower computer software of the equipment has the function of getting key point data

15. The device supports bar code recognition function, and can realize one-to-one correspondence between battery and channel, and record production data.

System protection function

1. The door can be opened and closed with door forbidden control, so as to protect the personal safety of operators and prevent potential safety accidents.

2. Over current, under current, over voltage, under voltage and over capacity protection: the upper and lower limits of battery voltage, current and capacity can be preset in the process. When the limit condition is reached, the system will automatically force the battery to sleep and prompt the fault in the software interface.

3. Leakage current protection: when the leakage current of more than 200mA is detected for more than three times in the working state, turn off the input power of the switching power supply.

4. Charging overvoltage protection: when the system inspects the battery during charging, when the battery voltage is higher than the upper limit voltage, the battery stops charging.

5. Discharge under voltage protection: when the system inspects the battery during battery discharge, when the battery voltage is lower than the lower limit voltage, the battery stops discharging.

6. Power down protection: in case of long-term communication interruption or PC failure, the device will automatically enter the waiting state, and continue the current process step after the communication is restored.

7. Other protection:

1) Process type protection allowed to be sent;

2) The function of the channel is abnormal;

3) When there is a long time communication interruption or PC failure, the device will automatically enter the waiting state, and continue the current process step after the communication is restored.

Data sharing

The equipment data can be uploaded to the public MES system, and the relevant parameters and processes can be downloaded from the MES system, and the data information and data can be provided according to the requirements of MES.

Three color alarm light (with sound and light)

Alarm lamp status requirements:

1) Wait (the process is finished) - yellow light;

2) Process in progress (sleep, charge, discharge) - green light;

3) System failure (over temperature, hardware failure, etc.) -- red light and sound.

4) Each channel has led display light to facilitate the selection of abnormal cells.

Basic configuration of the whole system

1. The temperature rise of the internal heat sink of the driving board and switching power supply on the equipment is ≤ 30 ℃, and the dissipated power of the heat sink shall be designed according to the long-term full scale (current of each channel is 20a), so as to ensure that the equipment can work stably for a long time.

2. The calibration period is 3 months. Within 3 months after equipment calibration, the voltage measurement and control accuracy of all channels shall be ≤± (0.5 ‰ FS + 0.5 ‰ RD), and the current measurement and control accuracy shall be ≤± (0.1% Rd + 0.1% FS).

3. Cooling mode of electrical part: fan exhaust cooling.

Equipment environmental requirements

Working environment temperature: 25 ± 8 ℃;

Relative humidity: 30% ～ 85%;

Installation location: indoor, clean workshop.