Extended battery pack life breakthrough bottleneck

　　Author ：Iflowpower – Portable Power Station Supplier

Today's social energy shortage, environmental pollution, etc. have put forward an important topic to humans. Each battery manufacturer actively develops various types of battery, especially with lithium-lying lithium-ion battery as an advanced representative to solve this problem.

Lithium dynamic lithium-ion battery applications and promotion bottlenecks, is important to fail in the battery pack during combined application, resulting in a decline in battery pack and battery packs. The battery pack management system produced by Harbin Crown Power Co., Ltd.

passes the outside of the battery voltage, current, environment and operating temperature, the interface and charger, load controller, indicator instrument, etc. The device function is linked, real-time detection of battery packs, extend battery pack life, thus opening this bottleneck. The battery management system has a CAN bus interface, and the battery management system communicates with the electric car main controller through the CAN bus interface, which can transmit all monitoring data of the battery management system, including total current, monomer, maximum voltage, maximum temperature.

, Minimum temperature, SOC, total voltage and other data. The electric car primary controller is based on the data transmitted by the battery management system, and the control of the vehicle is achieved, reaching a more reasonable use effect on lithium-powered lithium-ion batteries, extending the life of lithium-powered lithium ion battery. Management System Important Technical Indicator 1 Management System Adopt Modular Design, Total 10 Voltage Acquisition Modules, each voltage acquisition module has a temperature measurement sensor, a total of 10 temperature measurement points.

Current measurement uses independent modules, voltage collection, current collecting host machine management and control. Voltage and current modules use standard modules. 2 monomer voltage sampling range 0 ~ 5V, sampling accuracy±15mv, current sampling range 0 ~ 300A, sampling accuracy 1A temperature sampling range - 20 ¡ã C ~ 80 ¡ã C, sampling accuracy±1 ¡ã C 3 control mode voltage management: When working (discharge) in the battery pack, limit output: When any battery is dropped to 3.

65V (can be set), light a $ 5 light-emitting diode alarm light, to the motor controller Signal limit output. Stop output: When any one battery is dropped to 3.3V (settled), a relay closed signal is issued, and the motor controller signal control motor stops output.

Forced disconnection: When any of the battery pressure dropped to 3.0V, light a red flashing light emitting diode alarm, delay 20s, issued a relay closed signal, control the cut contactor to cut off battery discharge, relay contact Normally open. When the battery pack is charged, when any of the battery voltage exceeds 4.

3V, light a red flashing light emitting diode alarm lamp, the signal is sent to the charger, the charger is controlled immediately stop charging, or send it to the motor controller, stop energy Recycle. Temperature management: When the battery pack is discharged, when any one temperature is more than 40 ¡ã C, a relay closed signal is issued, the fan is activated, when the temperature is greater than 52 ¡ã C, light a red flashing light emitting diode alarm light, to the motor controller , Limit motor controller output. After the fan starts, the fan is stopped when the temperature drops to 36 ¡ã C.

When the battery pack is charged, when any one temperature is greater than 40 ¡ã C, a relay closed signal (and the same is the same as the above relay), start the fan, when the temperature is greater than 52 ¡ã C, lighting a red scintillation luminous diode alarm Light, signal to the charger, stop the charger output. After the fan starts, the fan is stopped when the temperature drops to 36 ¡ã C. Light-emitting diode light-emitting diodes and voltage over 4.

3V greater than 52 ¡ã C are the same. Current control: The battery pack is limited to 90A, lighting a red flashing light emitting diode alarm, exceeding the signal to the motor controller, motor controller limit output. When the battery pack accepts energy feedback current exceeding 30A, light a red flashing light emitting diode alarm lamp, and the signal stops the energy feedback of the motor controller.

4 Battery Management System Data Uploading Computer Communication Management System The main control module has a USB output interface that can realize communication between computers. The main control module has a CAN 2.0B interface that can communicate with other equipment via the CAN protocol.

The parameter adjustment of the management system can be completed by the button of the touch screen. The information when the battery pack is operating at any time, and the display and recording contents include the single battery voltage, temperature, current, SOC and total voltage, and the record format is notepad or Excel. Draw and print time / voltage (current), voltage (time) / capacity curve, according to recorded data.

The management module has a data save function. Save the battery pack to the last 3 days of data, the data content is a monomer battery voltage, charge and discharge current, temperature, SOC value. The data on the memory can be read through the computer, and the memory can be in the form of a flash memory or memory card, and the data can be saved for a long time in the memory.

5 The main control module uses a color 5.6-inch or 4.3-inch touch LCD screen, the data sampling time is 500ms.

SOC accuracy requirements±8%. The management system operating voltage DC12V is supplied from external supply. When the management system works, the power consumption is less than 5W, and the non-operating state consumption is less than 25MW.

There is a battery management system for use in the place where the battery is used, and the battery management system will bring new dawns to our society together with gre.