1. Overview of Functions

This model is an automatic detection and formation capacity system for rechargeable batteries, featuring high precision and energy efficiency. It is suitable for testing the formation and capacity of lithium batteries, as well as capacity sorting. The equipment is modularly manufactured for high versatility and easy maintenance. It utilizes the four-wire method to enhance testing accuracy. Each battery channel has an independent constant current and constant voltage source, forming individual circuits that do not interfere with each other. The control is carried out through the entire machine process.

The sampling speed is fast, completing one cycle of the entire cabinet inspection in less than 3 seconds. The minimum data recording frequency is greater than 5 seconds. The fully WINDOWS platform software offers powerful functionality, a user-friendly interface, and simple operation. The upper computer can set up to 32 steps and 256 cycles, with each formation step having four selectable attributes: constant current charge, constant voltage charge, constant current discharge, and sleep.

It can dynamically draw the curves of the formation and capacity of each battery during the process, including voltage/time curve, current/time curve, capacity/time curve, energy/time curve, and capacity/voltage curve. It employs LED indicator lights to display the working status of each battery. Communication can be established via Ethernet or RS-485. Each upper computer can monitor up to 20 devices, with a recommended monitoring limit of 10 devices.

The system has data loss protection, ensuring continuous operation in case of power failure. The software features a formation and capacity process library file editing and modification function, including new monitoring, opening, closing documents, printing, and settings.

The energy-saving effect is significant, consuming more than 50% less power than traditional linear devices under the same conditions. It can also substantially reduce the ambient temperature, lowering it by 5-15°C.

2. Main Technical Specifications

Battery Scanning Function:

Supports barcode scanning, allowing for the scanning of battery barcodes with options for sequential scanning and channel skipping scanning. This aids in future traceability (wireless barcode scanners are provided by the buyer).

Data Processing Function:

1) Local Data:

Detailed data during equipment operation is saved locally and not deleted. Files are saved for each run in a continuous file-saving manner, and data files can be copied to other computers for viewing.

The results data of equipment operation is saved locally and not deleted. Files are saved for each run in an MDB file, saving only the ending data of each step.

2) Server Data:

With configured data server, result data can be uploaded to the server database. The saving period can be set according to customer requirements. This MDB file is in standard database format and can be interfaced with MES systems.

3. AC/DC Bidirectional Power Supply Working Principle

1) Charging:

Charging uses a switched constant current source with higher energy conversion efficiency compared to traditional linear constant current sources.

Energy Flow: (Grid + energy generated by discharging equipment) → AC/DC Bidirectional Inverter Power Supply → Mainboard (DC/DC circuit) → Battery.

2) Discharging:

During discharging, the energy flow is as follows: Battery → Mainboard → AC/DC Bidirectional Inverter Power Supply → Grid → (Devices being charged + Grid).

During discharging, most of the energy will flow through the factory's AC bus to other energy-consuming devices (such as air conditioning, lighting, office equipment, etc.), and any excess energy will be fed back into the grid.

Note: The equipment is arranged in a double-sided two-layer structure, and the automatic pressure fixture is designed with a two-unit control mode structure. Each layer has a height of 380mm, with the highest working area being 1385mm above the ground and the lowest working area being 915mm above the ground.

5. Tray Structure and Fixture Arrangement

Note: Utilizing a dedicated four-wire probing fixture with a point spacing of 89mm. The spacing between positive and negative pole fixtures is adjustable within the range of 60-205mm. It is compatible with a battery height range of 120-260mm and a thickness range of 40-85mm.

6. Microcomputer System Main Configuration Requirements

Minimum Computer System Configuration: Dual-core or above CPU, 4G or above RAM, 500G or above hard disk space, EGA/VGA color display, one CD-ROM, one mouse, MicrosoftTM Windows 7 or above operating system, one available RS232 serial communication port or 10M Ethernet communication interface, and a Windows-compatible printer. The computer system is provided by Party A as needed, and the number of microcomputer systems is determined based on actual needs.

7. System Composition and Working Principle

System Composition:

l Lithium battery formation and capacity equipment

l Computer with USB/Ethernet interface

l USB to RS485 interface converter and communication cable or Cat5 communication cable with crystal head

l Equipment product software

System Operation Principles:

The equipment is connected to the upper-level control by a computer, facilitating tasks such as sending commands and collecting data. The keyboard allows manual operation of the device, displaying parameters and statuses. The constant current board, under the command of the CPU, functions with both constant current and constant voltage effects. During the battery charging process, the bidirectional power supply transforms alternating current into 14V direct current. This facilitates charging control and monitoring of the battery through the constant current board. In the discharge process, the steps are reversed. The voltage of the battery is first increased to 15V through the constant current board. Subsequently, the bidirectional power supply converts direct current into alternating current, feeding it directly into the factory's alternating current distribution network. This achieves the energy feedback of discharged battery power.