CN-122017622-A - Battery pack state monitoring system and method

Abstract

The invention discloses a battery pack state monitoring system and method, and relates to the technical field of battery management. The invention comprises a battery pack, a detection board monitoring system and a receiving terminal, wherein the battery pack is used as a detected object, a battery management system BMS is arranged in the battery pack to collect voltage, current, temperature, SOC and SOH original state data of the battery pack, the detection board monitoring system is external equipment independent of the battery pack, a power supply unit, a data transmission module, a control unit, an alarm module, a pluggable positioning module and an external interface are integrated in the detection board monitoring system, the receiving terminal is mobile equipment or a computer provided with monitoring software, and data interaction is established between the receiving terminal and the detection board monitoring system through wired or wireless communication. The invention is detachably connected with the battery pack through the standardized composite interface, does not need to modify the internal structure of the battery pack, realizes plug and play, is suitable for the battery pack which is delivered, distributed and deployed or moved, expands the applicable scene and improves the deployment flexibility.

Inventors

• YU WEIGUANG
• REN PENG
• ZHAN SIYA
• YIN YULONG

Assignees

• 安徽中安智源科技有限公司

Dates

Publication Date

20260512

Application Date

20260126

Claims (8)

1. 1. The utility model provides a battery package state monitoring system, includes battery package (1), pick-up board monitoring system (3) and receiving terminal (5), its characterized in that: the battery pack (1) is used as a detected object, and a battery management system BMS (11) is arranged in the battery pack, wherein the battery management system BMS (11) is used for collecting voltage, current, temperature, SOC and SOH original state data of the battery pack (1); The detection board monitoring system (3) is external equipment independent of the battery pack (1), and is detachably connected with the battery pack (1) through a standardized composite interface (2), and the standardized composite interface (2) simultaneously realizes the functions of power supply transmission and data communication; The receiving terminal (5) is connected with the detection board monitoring system (3) in a wired or wireless communication mode, and completes data interaction, and is used for processing, storing and visually displaying the state data of the battery pack (1), the information of the battery management system BMS (11) and the alarm information.
2. 2. The battery pack state monitoring system according to claim 1, wherein the power supply unit (31) comprises an independent battery (311) and an external power interface (312), the independent battery (311) is a rechargeable battery and supports disassembly and replacement, the external power interface (312) supports power supply for all modules in the detection board monitoring system (3) and a battery management system BMS (11) of the battery pack (1) and supports charging of the independent battery (311), the data transmission module (32) supports wired communication and various wireless communication protocols and has a manual switching function, a switching instruction of a user can be received through a human-computer interface to select a communication mode, the positioning module (35) is designed in a pluggable USB interface or a fixed on-board integrated mode and supports GPS, UWB or RFID positioning technology and is used for acquiring real-time geographic position information of the battery pack (1), the external power interface (36) supports an extended smoke sensor, a vibration sensor and a program burning through the interface, and the alarm module (34) comprises a buzzer, an LED indicator and a remote signal generating unit and is used for triggering abnormal alarm states of the battery pack (1) in multiple dimensions.
3. 3. The battery pack status monitoring system according to claim 1, wherein the control unit (33) is configured to: The system comprises a clock configuration, peripheral drive loading and self-checking after the power-on initialization, wherein the self-checking detects the voltage of a power supply unit (31), the communication of a data transmission module (32) and the connection state of a positioning module (35), supplies power to a battery management system BMS (11) through a standardized composite interface (2), collects the original data of the battery management system BMS (11), and collects the voltage/electric quantity data of the power supply unit (31), the position data of the positioning module (35) and the detection data of an external sensor; The method comprises the steps of preprocessing acquired data, including data filtering, outlier removing and data format conversion, carrying out multidimensional evaluation on the preprocessed data, distributing weight for each evaluation item, calculating overall risk score of a battery pack, comparing the overall risk score of the battery pack with a risk threshold value, and immediately triggering an alarm module (34) to generate alarm information containing an outlier type, occurrence time and battery pack ID if the data is judged to be high risk; The control data transmission module (32) transmits the state information of the battery pack (1), the information of the battery management system BMS (11) and the alarm information to the receiving terminal (5).
4. 4. The battery pack state monitoring system according to claim 3, wherein the monitoring software of the receiving terminal (5) presents data in the form of a digital instrument panel, a line graph and a list, a visual interface is provided for a user to set data acquisition frequency, communication mode priority and a working mode of the positioning module (35), after receiving alarm information, a terminal popup prompt and an audio alarm are triggered, alarm information export and historical alarm record inquiry are supported, and meanwhile, the adding/deleting detection board monitoring system (3) is supported, and the residual electric quantity and the communication state of a power supply unit (31) of each device are displayed.
5. 5. The battery pack state monitoring system according to claim 4, wherein the power supply unit (31) further comprises a charging management module and a protection circuit, the charging management module supports charging of the independent battery (311), the protection circuit comprises overvoltage protection, overcurrent protection and short-circuit protection, and when power supply abnormality is detected, the power supply circuit is automatically cut off to avoid damage to the internal modules of the detection board monitoring system (3).
6. 6. A battery pack status monitoring system according to claim 3, wherein the data transmission module (32) is configured to receive a manual switch command via the man-machine interface to switch between different communication modes, and to automatically reestablish the data connection and reissue critical data during the interrupt after the switch is completed.
7. 7. A battery pack state monitoring system according to claim 3, wherein the positioning module (35) further supports a low power consumption operation mode, the movement state of the battery pack (1) is determined according to the vibration sensor data, the positioning module (35) enters the low power consumption mode in a stationary state, and when the battery pack is detected to start moving, the positioning module is triggered to wake up automatically and restore to a normal positioning frequency.
8. 8. A method of monitoring the status of a battery pack based on the system of any one of claims 1-7, comprising the steps of: Step S1, system deployment and starting, wherein a detection board monitoring system (3) is in butt joint with a battery management system BMS (11) interface of a battery pack (1) through a standardized composite interface (2), an independent battery (311) is selected for supplying power or an external power supply (312) is selected for supplying power, after the system is electrified, a control unit (33) starts an initialization and self-checking process, an LED indicator lamp is normally on after self-checking is finished, and if self-checking is failed, a red LED flashes and alarms through a buzzer; Step S2, data acquisition and preprocessing, wherein a control unit (33) sends a data request instruction to a battery management system BMS (11), and the battery management system BMS (11) returns original data of voltage, current, temperature, SOC and SOH; Step S3, state judgment and alarm triggering, wherein the control unit (33) carries out multidimensional evaluation on the preprocessed data, and distributes weight for each evaluation item to calculate the total risk score of the whole battery pack, and when the high risk is judged, the control unit (33) triggers the alarm module (34) that the buzzer continuously sounds and the red LED flashes, and alarm information is generated at the same time; S4, data transmission and receiving processing, namely, a data transmission module (32) sends state information or alarm information of the battery pack (1) to a receiving terminal (5), and after receiving data, monitoring software (51) of the receiving terminal (5) analyzes the data, stores the data in a local database and updates a visual interface; step S5, user interaction and system maintenance, wherein a user checks data through the receiving terminal (5), clicks a history data button to inquire data of any period of time in the past 3 months, clicks a parameter configuration button to adjust data acquisition frequency, and when the electric quantity of an independent battery (311) of the detection board monitoring system (3) is less than or equal to 20%, the control unit (33) triggers low-electric quantity alarm to prompt the user to charge through the external power interface (312).

Description

Battery pack state monitoring system and method Technical Field The invention belongs to the technical field of battery management, and particularly relates to a battery pack state monitoring system and method, which are particularly suitable for the scenes of rapid deployment, remote monitoring and the like of a power battery pack, an energy storage system battery pack, a portable equipment battery pack and the like of a new energy automobile, and can realize real-time monitoring and abnormal alarming of the states of battery pack voltage, current, temperature, SOC, SOH and the like. Background With the wide application of battery technology in the fields of new energy sources, energy storage and the like, the safe operation and state monitoring of a battery pack become key requirements. The existing battery pack state monitoring technology mainly has the following defects: (1) The wired monitoring method has the limitations that the traditional wired monitoring method needs to directly connect monitoring equipment with a battery pack BMS through a wire harness, and has three major problems that firstly, the deployment cost is high, the wire harness length is required to be customized according to the installation position of the battery pack, the wiring process is complex, the wiring workload is extremely large especially for the energy storage battery packs which are distributed and deployed, secondly, the reliability is poor, the wire harness connection point is easily affected by vibration (such as a new energy automobile driving process) and corrosion (such as an outdoor energy storage scene), poor contact is caused, data acquisition is interrupted, thirdly, the flexibility is low, the battery packs which are put into use cannot be quickly modified, and if the battery packs need to be moved (such as portable energy storage power supply), the use range of the battery packs can be limited by wired connection. (2) The infrared camera is used for realizing state judgment by monitoring the surface temperature of the battery pack, but has obvious defects that firstly, a visual field blind area exists, when the battery packs are stacked and stored or are shielded by a shelf, the camera cannot capture the temperature of the shielded area, so that the monitoring is incomplete, secondly, the infrared camera only can detect the surface layer temperature after intervention, when the temperature is abnormal, the battery pack can possibly have thermal runaway, the intervention cannot prevent fault expansion at the moment, thirdly, the function is single, only the temperature can be monitored, key state data such as voltage, current, SOC and the like cannot be obtained, and a complete state evaluation system is difficult to form. At present, the market lacks a solution scheme capable of achieving 'without modifying a battery pack', 'wireless remote monitoring', 'multi-parameter comprehensive monitoring', 'abnormal timely alarming', so that a novel monitoring system is needed to fill the technical blank. Disclosure of Invention The invention aims to provide a battery pack state monitoring system and method, which are detachably connected with a battery pack through a standardized composite interface, do not need to modify the internal structure of the battery pack, realize plug and play, are suitable for the battery pack which is delivered from a factory, distributed and deployed or moved, and solve the problems of inconvenient deployment, poor flexibility, blind area monitoring and intervention lag of the existing battery pack monitoring wired monitoring, and infrared camera monitoring. In order to solve the technical problems, the invention is realized by the following technical scheme: the invention relates to a battery pack state monitoring system, which comprises a battery pack, a detection board monitoring system and a receiving terminal, The battery pack is used as a detected object, and a battery management system BMS is built in, and is used for collecting voltage, current, temperature, SOC and SOH original state data of the battery pack; The detection board monitoring system is external equipment independent of a battery pack, and is detachably connected with the battery pack through a standardized composite interface, and the standardized composite interface simultaneously realizes the functions of power supply transmission and data communication; The receiving terminal is provided with monitoring software, establishes data interaction with the detection board monitoring system through wired or wireless communication and is used for processing, storing and visually displaying battery pack state data, battery management system BMS information and alarm information. The power supply unit comprises an independent battery and an external power interface, wherein the independent battery is a rechargeable battery, the external power interface supports power supply for a battery management system BMS of all modul