Battery cell system

Abstract

The invention relates to a battery cell system. The system comprises a battery cell management system and a battery pack; the battery pack comprises at least one battery cell; the battery cell comprises a battery cell unit and a battery cell monitoring module which are packaged and combined together and are electrically connected with each other; a communication module is arranged in the battery cell monitoring module; the communication module receives and transmits data information from and to the battery cell management system through a power line carrier communication or radio frequency wireless communication mode. According to the system of the invention, the state of each battery cell can be monitored in real time, and the communication between each battery cell monitoring module andthe battery cell management system can be realized without the additional arrangement of a data line.

Description

technical field [0001] The invention relates to a battery system, in particular to a battery system using a brand-new communication method. Background technique [0002] Lithium batteries are currently the most widely used electrochemical energy storage components. Due to their special structure and characteristics, battery monitoring and management circuits are an essential part of lithium battery application systems. In the current application of lithium batteries, for small single-cell batteries, each battery is generally equipped with a battery protection board; a battery pack with multiple cells connected in series and parallel is equipped with a battery management system. The core of the battery protection circuit and battery management system is the lithium battery protection and management chip. A simple lithium battery protection chip can realize overvoltage, overcurrent and overtemperature protection; the management system of the lithium battery pack is composed o...

AI Technical Summary

Problems solved by technology

[0005] 2. At present, the charging and discharging protection chips of lithium batteries control the battery work in real time, and do not have the ability to record detailed information about the working status of the battery

Even if the data is collected and recorded through the battery management system, the data is stored on the computer of the application system, that is, stored on the terminal computer, and the important historical information of the battery cannot be tightly bound to the battery itself

For battery cascade utilization, one battery needs to serve multiple application systems. When migrating a lithium battery from one user system to another, it is difficult to obtain and utilize historical data of the battery

[0006] 3. The battery management system only monitors and protects the charging and discharging of lithium batteries in the working system, and other links such as storage and transportation are monitoring blind spots

For example, the monitoring of the battery's own temperature or the surrounding temperature cannot be controlled in real time. Once the temperature of the battery rises due to its own problems or the bad surrounding environment, causing a fire, the user cannot monitor and prevent in advance.

[0007] 4. In the existing battery monitoring scheme, the transmission of information needs to use a special data line. If each battery cell is to be used as an independent object for information collection and control, each battery cell needs to be connected to an additional data line. This will add a large number of data lines in the battery pack, resulting in high cost, complex structure, high failure rate, and difficult maintenance

Images