Introduction to 1. Equipment

Introduction to the function and principle of 1.1 equipment

This equipment is widely used in high-rate formation of soft-packed lithium cells under heating and pressurizing conditions. Tests have proved that ternary, lithium iron phosphate, lithium manganate and other material cells can be high-rate formation at high temperatures. The basic principle is due to the high temperature The conductivity of the electrolyte is greatly improved. The main operation process includes: manually taking materials from the preparation tooling and putting them into the hot pressing forming fixture, the fixture automatically heats, pressurizes and forms, the fixture automatically opens at the end of forming, and manually discharging materials from the hot fixture. This equipment is suitable for the production of specific types of batteries (drawings provided by the user). It is compatible with batteries with air bags without flushing pits and air bags with flushing pits. The equipment consists of two groups of hot pressing clamps.

The main functions of the 1.2 fixture are as follows

1.2.1 Provide the pressure required to compress the cell;

1.2.2 Ensure the reliable connection between the electrode and the circuit between the chemical forming machines.

The main functions of 1.3 are as follows

1.3.1 Heating and temperature control function;

1.3.2 Channel reliable docking function;

1.3.3 Charge and discharge function;

1.3.4 Data link and communication functions;

1.3.5 Safety and protection functions.

1.4 equipment action flow

Overall overall dimensions and appearance drawing of 1.5 equipment (length * width * height = 2850*1550*1750m)(reference drawing: actual style is subject to final finished product)

1.6.1. The system adopts intelligent humanized design, and the pressure adopts multi-stage pressure adjustment, and the pressure change of multi-stage pressure can be changed according to time;

1.6.2. Pressure one-button setting can automatically generate pressure and pressure as long as the length and width of the battery cell are input;

1.6.3. The temperature is controlled by the temperature module, and the real-time data collected by the K-type temperature control probe is fed back to the PLC. The temperature rises to 90 ℃ at room temperature for less than 30 minutes; the temperature error is ± 1.5 ℃;

1.6.4. The temperature control module is used to control and monitor the temperature. When the temperature is lower than the set temperature, the heating will automatically start, and when the temperature is higher than the set temperature, the heating will automatically stop. At the same time, the high temperature alarm of the second level is set. When the temperature exceeds the maximum temperature of the second level, the system will stop the heating and formation process of the whole fixture and notify the manual intervention of the system alarm. The temperature monitoring adopts multi-channel monitoring. The problem with heating all the way is that at least two or more parallel monitoring sends out independent alarm messages.

1.7 Introduction to Equipment Alarm and Safety (Refer to Figure)

1.7.1. The whole system is designed with multiple protection measures, abnormal alarm: low temperature alarm, high temperature alarm, overvoltage alarm, voltage and current abnormal alarm. The specific alarm conditions are described in this document;

1.7.2. A smoke alarm is installed on the protective cover. When the smoke alarm occurs, the machine stops running and gives an alarm;

1.7.3. Heating is set with secondary ultra-high temperature alarm. When the temperature is out of control and exceeds the highest set temperature, the system will automatically cut off the heating and formation process of the fixture and give an alarm sound.

Introduction of 1.8 power supply cable (refer to figure)

1.8.1. The wire connecting the equipment and the charging cabinet adopts flexible high temperature resistant wire, with two cores as voltage wire and two cores as current wire, meeting the current voltage of 5V30A with low resistance and high temperature resistance of 100 ℃.

Introduction to the 1.9 fixture heating plate (refer to the figure)

1.9.1. Each layer of aluminum plate is attached with silica gel heating plate, heating evenly, heating speed, temperature stability, can better protect the heating plate can also play a buffering role in the process of battery pressure.

2. Design requirements for main components of equipment:

2.1 overall requirements

2.1.1. Arrange in double rows, and refer to the figure above for dimensions;

2.1.2. The equipment shall be arranged with two hot pressing fixtures according to the size shown in the figure, and the forming time shall be 90min;

2.1.3. Equipment failure rate ≤ 1%, channel utilization rate ≥ 99%;

2.1.4. equipment maintenance is convenient, can quickly switch when changing products.

2.2 into hot pressing fixture

2.2.1. The forming and hot pressing fixture is suitable for providing certain pressure, heat conduction and reliable circuit connection during the forming of the battery core, and has the functions of forming and hot pressing. The fixture adopts horizontal layout, the pressure is provided by the cylinder, and the layer push structure is adopted to realize the clamping and opening of the layer plate. The upper and lower edges of the splint are provided with PCB circuit boards to ensure reliable connection with the battery cell Tab under the condition of clamping. The heating system uses a silicone electric hot plate.

2.2.2. The main functions of the fixture are as follows:

a. The horizontal layer pushing structure is adopted, the pressure of the layer plate is monitored in real time by the pressure sensor, and the pressure can be adjusted from 200kgf to 4200kgf;

B. the use of formwork structure design, so that the spring compression and spring has a good guiding performance. After the pressure plate is compressed by the spring, the deviation of both sides of the spring plate after inclination is ± 0.1mm;

c. The clamping or opening process of the clamp shall ensure that each splint is smooth and free of jamming;

d. When the clamp is pressed and the energized current is 0 ~ 30A, ensure that the Tab is reliably connected to the formation circuit;

E. the use of silica gel electric heating plate heating, temperature can be adjusted, the maximum temperature of 90 ℃, plywood temperature difference of 1.5 ℃, power 8KW;

F. plywood layer 16 layers, each layer of channel 2PCS;

g. The self-positioning elastic fingers for clamping the battery should be arranged neatly and in a consistent position to ensure reliable clamping of the battery;

h. The push plate connected to the linear bearing shall have a reliable guiding function for easy adjustment;

I. The fixture has heat insulation measures to prevent heat conduction to the outside of the fixture or other parts of the machine;

j.PCB circuit board should have the function of preventing short circuit;

k. The push plate connected to the cylinder should have a reliable guiding function to facilitate adjustment;

L. The laminate is equipped with a silica gel layer with a thickness of 1.5mm and a resin film pocket to prevent dust or adhesion and facilitate replacement;

M. The fixture shall be compact and reasonable in design, the thickness of the laminate shall be designed within 18mm, and the layer spacing shall be greater than 25mm after opening, and shall be made of aluminum alloy material;

Schematic Diagram under Fixture Reference

N. the equipment is driven by a cylinder, and the battery core is pressurized with a linear bearing push plate, with the pressure distribution uniformity of ± 20KG; Pressure fluctuation on the same pressure plate: <1%; The holding time is 1s-300min (adjustable).

2.3 fixture partition diagram:

二、   Incoming Material Specification and Scope of Adaptation

Note 1: 2 batteries are placed on each layer,

三、   Technical parameters of equipment

3.1 equipment failure rate ≤ 1%, channel utilization rate ≥ 99% (including failure caused by formation machine and fixture);

3.2 Mechanical and electrical gas specification: voltage AC 380±10%, installed power 14KW (including heating plate power);

The 3.3 equipment structure can support 5T pressure, and the cylinder is 300mm in diameter; 0.7MPA air pressure can generate 4.9T pressure, 0.6MPA air pressure can generate 4.2T pressure, the stable minimum air pressure of the general plant is 0.25, and the corresponding pressure is 785Kg;

The circuit connection between the 3.4 fixture and the charging equipment is realized by terminal;

3.5 temperature control range: room temperature ~ 90 ℃;

The 3.6 is specially designed according to the performance requirements of the power battery, which is suitable for the formation and sorting of the power battery;

The 3.7 adopts modular manufacturing, strong versatility and easy maintenance. The heating parts and non-heating parts are installed separately, the heat dissipation effect is good, and the system works stably and reliably;

3.8 charging power supply test configuration table:

3.9 mechanical thermostatic part configuration table:

3.10 machine system configuration:

3.11 equipment wearing parts table:

3.12 the clamping or opening process of the clamp to ensure that each clamp is smooth and free of jamming; Ensure reliable connection between the tab and the formation circuit; And the self-positioning elastic fingers clamping the battery should be arranged neatly and in the same position to ensure reliable clamping of the battery; The push plate connecting the linear bearing should have a reliable guiding function to facilitate adjustment;

The 3.13 needs to install three-color warning lights (with sound and light, LED bulbs): warning light status requirements:

3.13.1. Waiting (the process has not been sent or the process has been completed)-yellow light;

3.13.2. The process is in progress (standing, charging, discharging)--green light;

3.13.3. System failure (overtemperature, overvoltage, overcurrent, hardware failure, etc.)-red light and sound;

3.13.4. Smoke alarm (if there is a fire in the battery core inside the equipment, there will be heavy smoke, etc.)-buzzer alarm and the equipment will automatically turn off the power supply.

Environmental requirements for 3.14 equipment:

3.14.1. Ambient temperature: 30±5 ℃;

3.14.2. Relative humidity: 30% ~ 75%;

3.14.3. Atmospheric pressure: 750±30mmHg;

3.14.4. No strong electromagnetic field interference and corrosive gas erosion.