A battery management system with multiple safety detection functions

Abstract

The invention relates to a battery management system with various security detection functions. The battery management system with the various security detection functions comprises a microprocessor and a data selector, wherein the data selector is controlled by the microprocessor; each data input end of the data selector is connected with a plurality of different signal source sensors, the data output end of the data selector is sequentially connected with a filtering unit and a data distributor controlled by the microprocessor, each data output end of the data distributor is connected with a plurality of data processing circuits with different processing manners, and an output end signal of each data processing circuit is sent to the microprocessor. According to the battery management system disclosed by the invention, the file configuration is carried out by utilizing an upper computer; by utilizing the data selector and the data distributor, detection channels of different signal sources can be gated in a time sharing manner, and the processing circuits and the filtering manners can be flexibly configured, so that the signal processing cost and the processor resource are saved, the configurability of the battery management system on the detection of the external environment variable is improved, and repeated design is prevented.

Description

technical field [0001] The invention relates to a battery management system, in particular to a battery management system with multiple safety detection functions. technical background [0002] The current battery management system generally only conducts special detection design for the internal parameters of the battery (management object), such as voltage, temperature, current and system insulation state. Most management systems lack the physical quantity detection of the battery or battery pack system. Functions, such as acceleration, humidity, smoke concentration, pressure, salinity, etc. These physical quantities reflect the safety of the overall system of the battery pack and affect the service life of the battery. They must be used as an important function of the management system to provide external detection interfaces; part of the management system It is also designed with an external detection interface, which generally detects digital signals uniformly, lacks sy...

AI Technical Summary

Problems solved by technology

[0002] The current battery management system generally only conducts special detection design for the internal parameters of the battery (management object), such as voltage, temperature, current and system insulation state. Most management systems lack the physical quantity detection of the battery or battery pack system. Functions, such as acceleration, humidity, smoke concentration, pressure, salinity, etc. These physical quantities reflect the safety of the overall system of the battery pack and affect the service life of the battery. They must be used as an important function of the management system to provide external detection interfaces; part of the management system It is also designed with an external detection interface, which generally detects digital signals uniformly, lacks system matching and reliability processing for signal types; the management system lacks the function of detecting physical quantities such as acceleration, smoke concentration, pressure, and alarm signals, which will inevitably affect vehicles. The lack of long-term detection of humidity, salinity and other states for the safety of the battery pack during exercise will affect the performance and life of the battery pack; the external environmental variables of the battery pack are multiple and diverse, and a single interface cannot satisfy multiple signal sources The demand for detection may even cause false alarms for signal detection. If a detection circuit is specially designed for each signal, it will increase a lot of costs and even cause waste when the demand is unknown. The processor itself has insufficient resources. In some cases, the hardware and software overhead of the processor will be increased, and the processing efficiency of the processor will be reduced.

[0003] Most of the existing battery management systems do not have a special safety detection interface function, and a small part of the reserved signal detection function management system design is relatively simple. One way is that the analog signal is directly connected to the microprocessor after proper voltage division and RC filtering. The other method is that the digital signal is directly connected to the digital input pin of the microprocessor after isolation processing; in both methods, one signal source corresponds to one AD module of the microprocessor or one Therefore, this method can only detect fewer signals, which is far from satisfying the various signal sources corresponding to the complex working environment on the electric vehicle; the signal processing method is relatively simple, and it is prone to interference. Cause detection errors; the types of detection are all for strong signal sources, not suitable for relatively small signals

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