CN114407658A

CN114407658A - Battery monitoring system, method, vehicle and storage medium

Info

Publication number: CN114407658A
Application number: CN202111662845.3A
Authority: CN
Inventors: 刘轶鑫; 张頔; 荣常如; 齐睿; 杨亚飞; 佟丽翠; 刘渺然
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-29
Anticipated expiration: 2041-12-31
Also published as: CN114407658B

Abstract

The invention discloses a battery monitoring system, a method, a vehicle and a storage medium, wherein the system comprises: the system comprises a timing self-checking module, an abnormality self-checking module and a main control module; the timing self-checking module collects battery state information at regular time according to self-checking and determines the next self-checking timing of the timing self-checking module according to the battery state information; the timing self-checking module also informs the main control module when determining a fault according to the battery state information; the abnormal self-checking module monitors the battery state information in real time according to the low-power-consumption running mode and informs the main control module when determining a fault according to the battery state information; and the main control module is used for receiving the notifications of the timing self-checking module and the abnormity self-checking module and awakening the whole vehicle for fault treatment. According to the embodiment of the invention, the self-checking period of the timing self-checking module is dynamically adjusted by using the state information, and the battery state acquisition accuracy can be improved by monitoring the abnormal self-checking module with low power consumption in real time, so that the battery state information acquisition accuracy is improved, and the safety failure risk of the battery is reduced.

Description

Battery monitoring system, method, vehicle and storage medium

Technical Field

The embodiment of the invention relates to the technical field of automatic control, in particular to a battery monitoring system, a battery monitoring method, a vehicle and a storage medium.

Background

In recent years, the market demand of electric automobiles is gradually expanded, the energy demand of power batteries is also gradually increased, the requirement on the energy density of the power batteries is high, and the coverage of the safety monitoring function of the power batteries becomes an important factor for restricting the safety of vehicles. At present, the safety monitoring of a power battery by a battery management system can cover the periods of vehicle running, vehicle charging and the like, but a larger monitoring blank period exists in a parking and sleeping state of a vehicle.

In order to improve the coverage of the safety monitoring function of the power battery, the safety monitoring function of the power battery is mainly realized by the following technologies at present: one is that a pressure sensor, a smoke sensor and other sensors are arranged outside the vehicle, and after the sensors detect abnormal values, a battery management system of the vehicle is awakened to carry out corresponding fault treatment measures; one is to wake up the battery management system regularly by using a remote communication box (T-box) to complete the battery safety monitoring; another is to wake up the battery management system by setting a timed wake-up time set by the battery management system itself. However, in the prior art, the whole vehicle needs to coordinate a plurality of controllers to complete a monitoring function when being awakened regularly, so that the potential function failure risk is increased, and the risk of fault false alarm or failure alarm of the power battery system exists; the additional arrangement of the sensors not only increases the manufacturing cost of the vehicle, but also increases the number of the sensors of the vehicle, and further increases the risk of potential functional failure of the vehicle.

Disclosure of Invention

The invention provides a battery monitoring system, a battery monitoring method, a vehicle and a storage medium, which are used for dynamically awakening a battery management system to perform battery self-inspection, improving the monitoring coverage degree of a power battery and enhancing the use safety of the battery.

In a first aspect, an embodiment of the present invention provides a battery monitoring system, where the system includes: the system comprises a timing self-checking module, an abnormality self-checking module and a main control module; the timing self-checking module acquires battery state information according to self-checking timing and determines the next self-checking timing of the timing self-checking module according to the battery state information; the timing self-checking module also informs the main control module when determining a fault according to the battery state information; the abnormal self-checking module monitors the battery state information in real time according to a low-power-consumption running mode, and informs the main control module when determining a fault according to the battery state information; and the main control module is used for receiving the notifications of the timing self-checking module and the abnormity self-checking module and awakening the whole vehicle for fault processing.

In a second aspect, an embodiment of the present invention further provides a battery monitoring method, where the method includes:

acquiring battery state information at regular time according to self-checking, wherein the battery state information at least comprises one of battery voltage and insulation resistance; determining the next self-checking timing according to the battery state information; and informing the main control module when the fault is determined according to the battery state information.

In a third aspect, an embodiment of the present invention further provides another battery monitoring method, where the method includes:

acquiring battery threshold information set before a battery management system is powered off; monitoring battery state information in real time after the battery management system is powered off; and informing the main control module when determining the fault according to the battery state information and the battery threshold value information.

In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the battery monitoring method according to any one of the embodiments of the present invention.

The embodiment of the invention provides a battery monitoring system comprising a timing self-checking module, an abnormity self-checking module and a main control module, wherein the timing self-checking module acquires battery state information according to self-checking timing, sets next self-checking timing by using the acquired battery state information, and is also used for informing the main control module when a fault is determined according to the acquired battery state information, the abnormity self-checking module monitors the battery state information in real time under a low-power-consumption operation model and informs the main control module when the fault is determined according to the battery state information, and the main control module receives the informing information of the timing self-checking module and the abnormity self-checking module to awaken the whole vehicle to realize fault processing. The system provided by the embodiment of the invention can enhance the coverage degree of the safety monitoring of the battery by covering the whole using period of the battery through the timing self-checking module and the abnormity self-checking module, dynamically adjust the self-checking period of the timing self-checking module by using the state information, and carry out real-time monitoring through the abnormity self-checking module with low power consumption, thereby improving the accuracy of battery state information acquisition, improving the accuracy of battery state information acquisition and reducing the safety failure report risk of the battery.

Drawings

Fig. 1 is a schematic structural diagram of a battery monitoring system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another battery monitoring system provided in an embodiment of the present invention;

FIG. 3 is an exemplary diagram of a battery monitoring system provided by an embodiment of the present invention;

FIG. 4 is a flow chart of a battery monitoring method according to an embodiment of the present invention;

FIG. 5 is a flow chart of a battery monitoring method according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a battery monitoring device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another battery monitoring device provided in an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a battery management system according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a domain control system according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only a part of the structures related to the present invention, not all of the structures, are shown in the drawings, and furthermore, embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a battery monitoring system according to an embodiment of the present invention, where the battery monitoring system according to the embodiment of the present invention is applicable to a situation of battery safety monitoring, the method may be executed by the battery monitoring system, the system may be implemented by software and/or a hardware device, and the battery monitoring system may be implemented based on one or more chips, referring to fig. 1, where the system according to the embodiment of the present invention specifically includes: the system comprises a timing self-checking module 11, an abnormity self-checking module 12 and a main control module 13; the timing self-checking module 11 collects battery state information at regular time according to self-checking, and determines the next self-checking timing of the timing self-checking module 11 according to the battery state information; the timing self-checking module 11 also informs the main control module 13 when determining a fault according to the battery state information; the anomaly self-checking module 12 monitors the battery state information in real time according to the low-power-consumption operation mode, and informs the main control module 13 when determining a fault according to the battery state information; the main control module 13 is configured to receive the notification of the timing self-checking module 11 and the abnormality self-checking module 12, and wake up the entire vehicle to perform fault processing.

The timing self-checking module 11 may be a device having a timing wake-up function, the device may be located in an embedded device or a chip, the timing self-checking module 11 may wake up from a sleep state to a working state according to a set self-checking timing, and perform security detection on the battery system according to a preset self-checking logic. In the embodiment of the present invention, a program is set in the timing self-test module 11, and the program can verify the battery state information collected in the self-test process and notify the main control module 13 when a fault is determined, where the battery state information may be the attribute information of the battery collected by the timing self-test module 11, and may include the current, voltage, temperature, insulation resistance value, and the like of the battery. The timing self-checking module 11 may perform information interaction with the main control module 13 in a hard-wired or wireless connection manner, and may notify the main control module 13 of the failure, so that the main control module 13 performs subsequent processing.

In the embodiment of the present invention, the self-checking timing of the timing self-checking module 11 may be dynamically adjusted by the battery state information detected in each self-checking process, and different battery state information may correspond to the self-checking timing with different durations, for example, when the battery state information indicates that the battery system is healthy, the timing self-checking module 11 may detect the battery state information at a longer self-checking timing, and when the battery state information indicates that the battery system is close to a fault, the timing self-checking module 11 may detect the battery state information at a shorter self-checking timing.

Specifically, the abnormality self-checking module 12 in the battery monitoring system may monitor the battery system in real time, and after other modules are powered off, the abnormality self-checking module 12 may operate in a low power consumption mode. The abnormal self-checking module 12 may be configured and integrated in the battery system or the vehicle control system, and the abnormal self-checking module 12 may further perform fault detection on the detected battery state information, notify the main control module 13 when it is determined that the battery system has a fault, and wake up the main control module 13 so as to enable the main control module 13 to perform subsequent processing.

In the embodiment of the present invention, the main control module 13 in the battery monitoring system may be a control device that performs response processing on a fault, the main control module 13 may be a controller or a chip, and may implement a corresponding function according to a predetermined program, the main control module 13 may be connected to the timing self-inspection module 11 and the abnormality self-inspection module 12 in a wired or wireless manner, the main control module 13 may receive notifications of the timing self-inspection module 11 and the abnormality self-inspection module 12, where the notifications may be digital signals or analog signals, for example, when the main control module 13 receives a high level signal sent by the timing self-inspection module 11 or the abnormality self-inspection module 12, the main control module 13 may perform a working state from a sleep state, and execute the high level signal to trigger the main control module 13 to wake up the entire vehicle, the main control module 13 may send control information to other devices of the entire vehicle, and realizing corresponding control.

Fig. 2 is a schematic structural diagram of another battery monitoring system according to an embodiment of the present invention, which is embodied on the basis of the above-described embodiment of the present invention, and referring to fig. 2, the timing self-test module 11 in the embodiment of the present invention can adjust the self-test timing of the next use according to the battery voltage and/or the insulation resistance value in the battery state information. When using battery voltage to adjust self-checking, include: the timing self-checking module 11 in the system provided by the embodiment of the invention wakes up the battery management system 14 at regular time according to self-checking; the timing self-checking module 11 controls the battery management system 14 to acquire the voltage minimum value of at least one single battery, determines the minimum voltage position and the voltage minimum value mean value, and takes the difference value between the voltage minimum value and the voltage minimum value mean value and the minimum voltage position as battery state information; the timing self-checking module 11 acquires a difference value between a minimum value of the historical voltage and an average value of the minimum value of the historical voltage stored before the battery management system 14 is powered off last time and a historical minimum voltage position as historical battery state information; the timing self-test module 11 compares the battery state information with historical battery state information to determine the battery change degree; the timing self-checking module 11 determines the next self-checking timing of the timing self-checking module 11 according to the battery variation degree.

In the embodiment of the present invention, the timing self-test module 11 may use a clock to perform timing in a sleep state, and when the clock times a duration corresponding to the self-test timing, the timing self-test module 11 may perform an operating state from the sleep state and send a signaling to the battery management system 14, so that the battery management system 14 enters the operating state, where a system for managing the battery by the battery management system 14 generally has functions of measuring a battery voltage, a battery temperature, and an insulation resistance value, and may prevent or avoid abnormal situations such as over-discharge, over-charge, and over-temperature of the battery. As battery technology has evolved, battery management system 14 has also gradually added a number of corresponding functions. The battery management system 14 may detect each single battery to obtain a voltage minimum value, a minimum voltage position, and a voltage minimum value average value of each single battery. The battery system detected by the battery monitoring system may be composed of a plurality of single batteries, each battery may have its own battery state information, the battery management system 14 may measure the battery state information of each single battery, the minimum voltage value may be the minimum voltage that each single battery can reach, the minimum voltage position may be the identification information or the position information of the single voltage of the minimum value among the voltage minimum values, and the minimum voltage mean value may be the average value of the voltage minimum values. The battery management system 14 may collect the minimum voltage value of each battery cell, determine the minimum voltage position and the minimum voltage mean value, and use the difference between the minimum voltage value and the minimum voltage mean value and the minimum voltage position as the battery state information.

In the embodiment of the present invention, the battery monitoring system may further include a storage medium, where the storage medium may be used to store battery state information acquired by the timing self-inspection module 11 in a previous self-inspection process, and for table distinction, the battery state information stored in the storage medium may be recorded as historical battery state information, and the historical battery state information corresponding to the battery state information may include a difference between a historical voltage minimum value and a historical voltage minimum value average value in the previous self-inspection process and a historical minimum voltage position.

The timing self-checking module 14 may read historical battery state information stored in the storage medium, compare the collected battery state information with the historical battery state information, determine the battery change degree according to the change trend of the value, and determine the self-checking timing for the next use according to the battery change degree. For example, the value of the historical battery state information is smaller than the battery state information, and the minimum voltage position changes, which indicates that the health state of the battery system deteriorates, and a smaller self-checking timing can be selected, or the duration is reduced on the basis of the current self-checking timing; if the value of the historical battery state information is larger than the battery state information and the minimum voltage position is not changed, the health state of the battery system is recovered, and a larger self-checking timing can be selected or the time length is increased on the basis of the self-checking timing of the time; if the value of the historical battery state information is equal to the battery state information, the health state of the battery is not obviously changed, and the self-checking timing used at this time can be selected.

Further, on the basis of the above embodiment of the present invention, the determining, by the timing self-test module 11, the next self-test timing of the timing self-test module 11 according to the battery variation degree includes:

if the minimum voltage position is the same as the historical minimum voltage position, the timing self-checking module 11 stores the difference value between the minimum voltage value and the average value of the minimum voltage values as the difference value between the minimum historical voltage value and the average value of the minimum historical voltage values;

if the minimum voltage position is different from the historical minimum voltage position, the timing self-checking module 11 stores the difference between the historical voltage minimum value and the historical voltage minimum value mean value as 0;

when the difference between the minimum voltage value and the average voltage value and the difference between the minimum historical voltage value and the average historical voltage value is greater than or equal to a first threshold voltage, the timing self-checking module sets the voltage storage count to be a maximum threshold value and sets the self-checking timing to be a first time length;

when the difference between the minimum voltage value and the average voltage value and the difference between the minimum historical voltage value and the average historical voltage value is smaller than a first threshold voltage and larger than a second threshold voltage, the timing self-checking module adds 1 to the voltage storage count and sets the self-checking timing to be a second time length;

when the difference between the difference value of the minimum voltage value and the average voltage value and the difference value of the minimum historical voltage value and the average historical voltage value are smaller than or equal to a second threshold voltage, the timing self-checking module clears the voltage storage count and sets the self-checking timing to be a third time length; wherein the first duration, the second duration and the third duration are sequentially increased.

In the embodiment of the present invention, the timing self-checking module 11 may specifically determine the self-checking timing according to the battery variation degree by selecting a corresponding time length as the self-checking timing according to a comparison result between the historical battery state information and the battery state information, and if the minimum voltage position is the same as the historical minimum voltage position after the comparison, it indicates that no additional discharge occurs in the battery system, and the timing self-checking module 11 may store a difference between a voltage minimum value in the battery state information and a voltage minimum value mean value in a storage medium of the battery monitoring system as the historical battery state information. Conversely, if the minimum voltage position is different from the historical minimum voltage position, it indicates that the voltage of the single battery is reduced in the battery system, and the difference between the historical voltage minimum value in the storage medium in the battery monitoring system and the average value of the historical voltage minimum values is stored as 0.

Specifically, the timing self-check module may compare a difference between a difference R1 between a determined voltage minimum value and a voltage minimum value mean value and a difference R2 between a historical voltage minimum value and a historical voltage minimum value mean value with a first threshold voltage, wherein the first threshold voltage may be a maximum voltage variation value of a self-discharge fault of a single battery, and the first threshold voltage may be determined by the type and type of the single battery in the battery system. If the difference is greater than the first threshold voltage, it indicates that the single battery exceeds the maximum voltage change value of the self-discharge fault, the battery system may consider that the fault exists, and may set the voltage storage count to be the maximum threshold value and the self-checking timing to be the first duration, where the voltage storage count may be the maximum tolerance of the battery fault, and when the voltage storage count in the timing self-checking module 11 is greater than or equal to the maximum threshold value, it may be considered that the battery system has the fault due to the voltage. The first time length may be a shorter time length, and the self-checking timing of the timing self-checking module 11 may be shortened.

In the similar process, when the difference between the minimum voltage value and the average voltage value and the difference between the minimum historical voltage value and the minimum historical voltage value is smaller than the first threshold voltage and larger than the second threshold voltage, where the second threshold voltage may be the minimum value of the normal voltage range of the single battery, and when the change degree of the battery acquired by the timing self-test module 11 is smaller than the first threshold voltage and larger than the second threshold voltage, that is, exceeds the normal voltage range but does not reach the fault state, the voltage storage count may be increased, and the self-test timing is set to be the second duration, it can be understood that the second duration is longer than the first duration in the persistence time.

Further, when the difference between the minimum voltage value and the average voltage value and the difference between the minimum historical voltage value and the minimum historical voltage value is smaller than the second threshold voltage, the battery state information acquired by the timing self-check module 11 indicates that the batteries are all in a normal state, the self-check timing may be set to a third time length, and the third time length may be greater than the second time length.

In the embodiment of the present invention, the timing self-test module 11 using the insulation resistance value to adjust the self-test timing includes: the timing self-checking module 11 wakes up the battery management system 14 according to the self-checking timing; the timing self-checking module 11 controls the battery management system 14 to acquire a positive electrode ground insulation resistance value and a negative electrode ground insulation resistance value of the battery system, and a first temperature difference between the highest temperature and the average temperature of the battery in the battery system as battery state information; and the timing self-checking module 11 determines the next self-checking timing of the timing self-checking module according to the magnitude relation between the battery state information and the threshold parameter.

The positive electrode ground insulation resistance value can be the integral positive electrode ground resistance value of the battery system, the negative electrode ground insulation resistance value can be the integral negative electrode ground resistance value of the battery system, the first temperature difference can be the temperature difference between the highest temperature and the average temperature in the battery system, the highest temperature of the battery can be the battery temperature of one or more single batteries in the battery system, the battery temperature can be the highest temperature value in the battery system, and the average temperature can be the average temperature of each single battery in the battery system. The threshold parameter can be a parameter for distinguishing the state of the battery system, the threshold parameters with different values can reflect different states of the battery system about the insulation resistance value, the threshold parameter can be determined by the type and the size of the battery system, and the threshold parameter can be divided into a plurality of different values according to different insulation states of the battery system.

In the embodiment of the present invention, the timing self-test module 11 may use a clock to time in a sleep state, and when the clock times to a time duration corresponding to the self-test timing, the timing self-test module 11 may perform a working state from the sleep state and send a signaling to the battery management system 14, so that the battery management system 14 enters the working state. The battery management system 14 may collect an anode ground insulation resistance value and a cathode ground insulation resistance value of the battery system, may also collect a battery highest temperature in the battery system and a battery temperature of each battery cell, and the battery management system 14 may calculate an average temperature using the battery temperature of each battery cell, and determine a first temperature difference between the battery highest temperature and the average temperature, and may use the first temperature difference, the anode ground insulation resistance value, and the cathode ground insulation resistance value as battery state information.

Specifically, after the timing self-checking module 11 obtains the battery state information, the battery state information may be compared with a threshold parameter, a battery state that the battery state information conforms to is determined, and self-checking timing for next use of the timing self-checking module 11 may be determined according to battery state acquisition.

Further, on the basis of the above embodiment of the present invention, the determining, by the timing self-test module, the next self-test timing of the timing self-test module according to the magnitude relationship between the battery state information and the threshold parameter includes:

the timing self-checking module 11 obtains a first insulation resistance threshold, a second insulation resistance threshold and a temperature difference threshold in the threshold parameters, wherein the first insulation resistance threshold is smaller than the second insulation resistance threshold, and the first insulation resistance threshold and the second insulation resistance threshold are determined by a safe insulation resistance range of the battery system;

the timing self-checking module 11 determines a positive pole size relationship, a negative pole size relationship and a temperature difference size relationship respectively corresponding to a positive pole ground insulation resistance value R1, a negative pole ground insulation resistance value R2 and a first temperature difference in the battery state information and a first insulation resistance value threshold, a second insulation resistance value threshold and a temperature difference threshold in the threshold parameter;

and searching corresponding timing duration in a preset timing information table according to the anode size relation, the cathode size relation and the temperature difference size relation to serve as the next self-checking timing.

The first insulation resistance value threshold value can be a fault critical value of the anode-to-ground insulation resistance value, the second insulation resistance value threshold value can be a fault critical value of the cathode-to-ground insulation resistance value, the temperature difference threshold value can be a fault critical value of the first temperature difference, and when the temperature difference threshold value exceeds the threshold value in the threshold value parameter in the battery state information, the fault risk can be considered to exist.

In the embodiment of the present invention, the battery state information may be compared with the threshold parameter to determine an orthogonal magnitude relationship between the positive ground insulation resistance value R1 and the first insulation resistance value threshold, a negative ground insulation resistance value R2 and the second insulation resistance value threshold, and a temperature difference magnitude relationship between the first temperature difference and the temperature difference threshold, and when one or more of the positive ground insulation resistance value R1, the negative ground insulation resistance value R2, and the second insulation resistance value threshold are found in the preset timing information table as a self-check, the preset timing information table may be preset, and different conditions of the positive ground insulation resistance value R3578, the negative ground insulation resistance value R2, and the temperature difference magnitude relationship between the first temperature difference and the temperature difference threshold are stored in association with different timing durations.

Further, on the basis of the above embodiment of the present invention, the timing self-test module 11 may notify the main control module of the battery fault determined according to the voltage or the battery fault determined according to the insulation resistance value, and notify the main control module of the battery fault determined according to the voltage, which may include: the timing self-checking module 11 acquires a voltage storage count corresponding to the battery state information; when the storage count is greater than or equal to the failure threshold number of times, generating notification information to the main control module 13; the main control module 13 generates an excitation signal 1 according to the notification information to activate the network management function, and wakes up the whole vehicle to perform fault processing and fault early warning.

In the embodiment of the present invention, the timing self-test module 11 may perform fault determination by using the battery state information and the voltage storage count, for example, when the voltage storage count is greater than or equal to the fault threshold number, it indicates that the fault of the battery system exceeds the tolerance, and may perform fault wake-up. The awakening process may include the timing self-checking module 11 transmitting notification information to the main control module 13, awakening the main control module 13, enabling the main control module 13 to generate the excitation signal 1, activating the network management function of the entire vehicle, and performing fault handling and fault pre-warning through the network management function failure, for example, uploading fault information to a T-box using the network management function, or transmitting trigger information to the entire vehicle controller, triggering the entire vehicle controller to perform fault handling and fault pre-warning.

In another aspect, notifying the main control module of the battery fault determined according to the insulation resistance value may include: the timing self-checking module 11 also obtains stored historical positive pole ground insulation resistance values, historical negative pole ground insulation resistance values, historical first temperature differences and resistance value storage counts; the timing self-checking module 11 determines a positive difference value, a negative difference value and a temperature difference value which respectively correspond to the historical positive ground insulation resistance value, the historical negative ground insulation resistance value and the historical first temperature difference value respectively; under the condition that the anode difference value is larger than zero, the timing self-checking module 11 saves the anode ground insulation value as a historical anode ground insulation value, otherwise, the historical anode ground insulation value is set to be zero; under the condition that the negative difference value is larger than zero, the timing self-checking module stores the negative earth insulation value as a historical negative earth insulation value, and otherwise, the historical negative earth insulation value is set to be zero; when the anode difference value and/or the cathode difference value are/is larger than or equal to the insulation change limit, the timing self-checking module sets the resistance value storage count as the maximum count value; when the anode difference value and/or the cathode difference value is smaller than the insulation change limit and larger than the insulation normal value, the timing self-checking module increases the resistance value storage count by 1; when the positive difference value and/or the negative difference value are/is smaller than the insulation normal value, the timing self-checking module clears the resistance value storage count; when the timing self-checking module judges that the resistance value storage count is greater than or equal to the maximum count value and the temperature difference value is greater than zero, generating notification information to the main control module; and the main control module generates an excitation signal 1 according to the notification information to activate a network management function and awaken the whole vehicle to perform fault processing and fault early warning.

The resistance value storage count can be the maximum tolerance degree of the battery due to the change of the insulation resistance value, the times of deterioration of the insulation resistance value can be counted by the resistance value storage count, the historical positive electrode ground insulation resistance value, the historical negative electrode ground insulation resistance value and the historical first temperature difference can be battery state information collected by the timing self-checking module 11 last time, and the battery state information can be stored in a storage medium of the battery monitoring system. The insulation change limit may be a maximum insulation change value that causes a battery failure, and the insulation normal value may be a maximum value of a reasonable range of insulation resistance values of the battery.

In the embodiment of the present invention, the timing self-test module 11 may obtain the stored historical positive-to-ground insulation resistance value, the historical negative-to-ground insulation resistance value, the historical first temperature difference, and the resistance value storage count as historical battery state information, compare the battery state information with the historical battery state information, determine a corresponding positive difference value, negative difference value, and temperature difference value, store the positive-to-ground insulation group or the negative-to-ground insulation resistance value when the positive difference value or the negative difference value is greater than zero, and otherwise set the historical positive-to-ground insulation resistance value or the historical negative-to-ground insulation resistance value to 0. And setting the resistance value storage count as the maximum count when at least one of the negative difference value and the positive difference value is greater than the insulation change threshold value, increasing the resistance value storage count when at least one of the negative difference value and the positive difference value is less than the insulation change threshold value but greater than the insulation normal value, and resetting the resistance value storage count when the negative difference value or the positive difference value is less than the insulation normal value. The timing self-checking module 11 judges the resistance value storage count, if the resistance value storage count is greater than or equal to the maximum count value and the temperature difference value is greater than zero, notification information is generated and sent to the main control module, the notification information can be generated to trigger the main control module 13 to enter a working mode, the main control module 13 can generate an excitation signal 1, the network management function of the whole vehicle is activated, and failure fault processing and fault early warning are achieved through the network management function.

Further, on the basis of the above embodiment of the invention, the method may further include: the timing self-inspection module 11 takes the minimum value of the self-inspection timing determined according to the battery variation degree and the self-inspection timing determined according to the magnitude relationship as the next self-inspection timing.

Specifically, when the timing self-checking module 11 determines that a fault is caused by using the voltage and the resistance at the same time, self-checking timings with two different durations may be determined, that is, the self-checking timing determined by the battery change degree and the self-checking timing determined by the size relationship may be used as the self-checking timing for the next use of the timing self-checking module 13, which is the minimum self-checking timing among the self-checking timings.

Further, on the basis of the above embodiment of the present invention, the abnormal self-checking module 12 monitors the battery state information in real time according to the low power consumption operation mode, and notifies the main control module 13 when determining a fault according to the battery state information, including:

the abnormality self-checking module 12 acquires a battery temperature threshold, a battery high voltage threshold and a battery low voltage threshold which are set before the battery management system is powered off; after the battery management system is powered off, the abnormal self-checking module enters a low-power-consumption running mode and monitors battery state information in real time; when the battery state information exceeds at least one of a battery temperature threshold, a battery high voltage threshold and a battery low voltage threshold, generating notification information to the main control module; and the main control module generates an excitation signal 2 according to the notification information to activate a network management function and awaken the whole vehicle to perform fault processing and fault early warning.

In the embodiment of the present invention, the abnormality self-checking module 12 monitors the battery system in real time, collects a battery temperature threshold, a battery high voltage threshold, and a battery low voltage threshold before powering down the battery management system each time, and uses the battery state information collected after powering down the above thresholds to determine, when at least one of the battery temperature and the battery high voltage in the battery state information does not satisfy the above thresholds, for example, the battery temperature exceeds the battery temperature threshold, the battery voltage is lower than the battery low voltage threshold, or the battery voltage is higher than the battery high voltage threshold, a battery system fault is determined, and a notification message may be generated to the main control module 13, so that the main control module generates the excitation signal 2 to activate the network management function, and wakes up the entire vehicle to perform fault processing and fault early warning.

Further, on the basis of the above embodiment of the present invention, the main control module is configured to receive the notifications of the timing self-checking module and the abnormal self-checking module, and wake up the entire vehicle for fault processing, including: the main control module carries out working state when receiving the communication information of the timing self-checking module and the abnormal self-checking module; the main control module activates a network management function, uploads battery fault processing information corresponding to the notification information to the vehicle control unit and uploads battery data corresponding to the notification information to the remote communication box.

In an exemplary embodiment, fig. 3 is an exemplary diagram of a battery monitoring system according to an embodiment of the present invention, and referring to fig. 3, the battery monitoring system may implement safety monitoring of self-awakening of a battery management system when a vehicle is in a sleep state, where the safety monitoring includes a timed awakening control and an abnormal awakening control, the timed awakening control is to set a timed awakening period for awakening through a clock chip of the battery management system, and the abnormal awakening control is to collect information of battery voltage and temperature through an analog front end of the battery management system, and awaken the battery management system when it is identified that the battery voltage and the temperature are abnormal. The defect of safety monitoring coverage degree of timing self-awakening independently depending on a clock chip is overcome by adding the abnormal self-awakening function of the analog front end of the battery management system, and meanwhile, the safety monitoring loss when the clock chip fails can be avoided.

Monitoring data such as battery voltage, temperature, battery system insulation resistance value and low-voltage storage battery voltage in the timed awakening process of the battery management system, starting a corresponding safety monitoring function (such as starting switches 1 and 2 in figure 3), if an abnormal state is judged in the corresponding safety monitoring function, feeding back a demand signal to a timed awakening control function (such as demand feedback signals 1 and 2 in figure 3), outputting an excitation signal 1 to the network management function of the battery management system by combining the feedback signal, completing the function interaction with the whole vehicle controller, and uploading data to a data monitoring platform through a T-box. When the analog front end of the battery management system identifies that the voltage and the temperature of the battery are abnormal, the battery management system enters an abnormal self-awakening control function, triggers an excitation signal 2 to be output to a network management function, completes the function interaction with the vehicle control unit, and uploads data to a data monitoring platform through a T-box.

Fig. 4 is a flowchart of a battery monitoring method according to an embodiment of the present invention, where the self-wake function of a battery management system is controlled without changing hardware design and increasing system cost, the method may be executed by the timing self-test module 11 in the battery monitoring system according to the embodiment of the present invention, and may be implemented in a software and/or hardware manner, and the battery monitoring method may include the following steps:

and step 110, collecting battery state information at regular time according to self-checking, wherein the battery state information at least comprises one of battery voltage and insulation resistance.

In the embodiment of the invention, the timing self-test module can enter a working state at regular time according to self-test and collect battery state information of the battery system, wherein the battery state information can comprise battery voltage and insulation resistance, the battery voltage can be specific to each single battery in the battery system, and the insulation resistance can be specific to the whole battery system.

And step 120, determining the next self-checking timing according to the battery state information.

Specifically, the health state of the battery system can be determined through the battery state information, the self-checking timing of the timing self-checking module can be adjusted and determined according to the health state, and it can be understood that the higher the health state of the battery system is, the longer the time corresponding to the self-checking timing used by the timing self-checking module is.

And step 130, notifying the main control module when the fault is determined according to the battery state information.

In the embodiment of the invention, the timing monitoring module can also use the battery state information to determine the fault, send the notification information to the main control module, wake up the main control module and execute the fault processing operation.

According to the embodiment of the invention, the battery state information is acquired at regular time according to the self-checking, the self-checking timing is adjusted according to the battery state information, and the main control module is informed when the fault is determined according to the battery state information. According to the embodiment of the invention, the self-checking period of the timing self-checking module is dynamically adjusted by using the state information, so that the accuracy of battery state acquisition can be improved, the accuracy of battery state information acquisition can be improved, and the safety failure report risk of the battery can be reduced.

Further, on the basis of the above embodiment of the present invention, acquiring battery state information according to self-test timing, and determining next self-test timing according to the battery state information includes:

awakening the battery management system at regular time according to the self-checking; controlling the battery management system to collect the voltage minimum value of at least one single battery, determining the minimum voltage position and the voltage minimum value mean value, and taking the difference value between the voltage minimum value and the voltage minimum value mean value and the minimum voltage position as the battery state information; acquiring a difference value between a minimum value of the historical voltage and an average value of the minimum value of the historical voltage stored before the battery management system is powered off last time and a historical minimum voltage position as historical battery state information; comparing the battery state information with the historical battery state information to determine the degree of change of the battery; and determining the self-checking timing of the timing self-checking module next time according to the battery change degree.

Further, on the basis of the embodiment of the present invention, determining the next self-test timing of the timing self-test module according to the battery variation degree includes:

if the minimum voltage position is the same as the historical minimum voltage position, the timing self-checking module stores the difference value between the minimum voltage value and the average value of the minimum voltage values as the difference value between the minimum historical voltage value and the average value of the minimum historical voltage values;

if the minimum voltage position is different from the historical minimum voltage position, storing the difference value between the historical voltage minimum value and the average value of the historical voltage minimum values as 0;

setting a voltage storage count as a maximum threshold value and setting the self-checking timing as a first duration when the difference between the voltage minimum value and the voltage minimum value average value and the difference between the historical voltage minimum value and the historical voltage minimum value average value are greater than or equal to a first threshold voltage;

when the difference between the voltage minimum value and the voltage minimum value average value and the difference between the historical voltage minimum value and the historical voltage minimum value average value is smaller than a first threshold voltage and larger than a second threshold voltage, adding 1 to a voltage storage count, and setting the self-checking timing to be a second time length;

when the difference between the difference value of the minimum voltage value and the average voltage value and the difference value of the minimum historical voltage value and the average historical voltage value is smaller than or equal to a second threshold voltage, clearing a voltage storage count, and setting the self-checking timing to be a third time length; wherein the first duration, the second duration, and the third duration are sequentially increased.

Further, on the basis of the above embodiment of the present invention, notifying the main control module when determining a failure according to the battery state information includes: acquiring a voltage storage count corresponding to the battery state information; and when the storage count is greater than or equal to the failure threshold number of times, generating notification information to the main control module, so that the main control module generates an excitation signal 1 according to the notification information to activate a network management function, and awakening the whole vehicle to perform failure processing and failure early warning.

Further, on the basis of the above embodiment of the present invention, acquiring battery state information according to self-test timing, and determining next self-test timing according to the battery state information includes: awakening the battery management system at regular time according to the self-checking; controlling the battery management system to acquire a positive electrode ground insulation resistance value and a negative electrode ground insulation resistance value of a battery system, and a first temperature difference between the highest temperature and the average temperature of a battery in the battery system as battery state information; and determining the next self-checking timing of the timing self-checking module according to the size relationship between the battery state information and the threshold parameter.

Further, on the basis of the embodiment of the present invention, determining the next self-checking timing of the timing self-checking module according to the size relationship between the battery state information and the threshold parameter includes:

acquiring a first insulation resistance threshold, a second insulation resistance threshold and a temperature difference threshold in the threshold parameters, wherein the first insulation resistance threshold is smaller than the second insulation resistance threshold, and the first insulation resistance threshold and the second insulation resistance threshold are determined by a safe insulation resistance range of the battery system; determining a positive pole size relationship, a negative pole size relationship and a temperature difference size relationship respectively corresponding to the positive pole ground insulation resistance value R1, the negative pole ground insulation resistance value R2 and the first temperature difference in the battery state information and the first insulation resistance value threshold value, the second insulation resistance value threshold value and the temperature difference threshold value in the threshold parameter; and searching corresponding timing duration in a preset timing information table according to the anode size relation, the cathode size relation and the temperature difference size relation to serve as the next self-checking timing.

Further, on the basis of the above embodiment of the present invention, notifying the main control module when determining a failure according to the battery state information includes: obtaining stored historical positive pole ground insulation resistance values, historical negative pole ground insulation resistance values, historical first temperature differences and resistance value storage counts; determining a positive difference value, a negative difference value and a temperature difference value which respectively correspond to the historical positive insulation resistance value to the ground, the historical negative insulation resistance value to the ground and the historical first temperature difference in the battery state information; if the anode difference value is larger than zero, the anode-to-ground insulation value is saved as the historical anode-to-ground insulation value, otherwise, the historical anode-to-ground insulation value is set to zero; if the negative pole difference value is larger than zero, the negative pole ground insulation value is stored as the historical negative pole ground insulation value, otherwise, the historical negative pole ground insulation value is set to be zero; when the anode difference value and/or the cathode difference value are/is larger than or equal to insulation change limit, setting the resistance value storage count as a maximum count value; increasing the resistance value storage count by 1 when the positive pole difference value and/or the negative pole difference value is less than the insulation change limit and greater than an insulation normal value; when the positive pole difference value and/or the negative pole difference value are/is smaller than the insulation normal value, clearing the resistance value storage count; and when the resistance value storage count is judged to be greater than or equal to the maximum count value and the temperature difference value is judged to be greater than zero, notification information is generated and sent to the main control module, so that an excitation signal 1 is generated according to the notification information to activate a network management function, and the whole vehicle is awakened to perform fault processing and fault early warning.

In an exemplary embodiment, a timing wake-up period of a battery management system is adjusted according to a self-discharge degree of a battery cell, so as to improve a diagnosis coverage of a self-discharge fault early warning of the battery system cell, and the method specifically includes the following steps:

step 1: and calculating the minimum value, the minimum value position and the average value of the voltage of the battery monomer.

Step 2: and calculating the absolute value delta V1 of the voltage difference between the average value and the minimum value of the battery cells.

And step 3: the battery management system stores and records the position of the minimum value at the position of the Δ V1 before the power is reduced every time.

And 4, step 4: after the battery management system is awakened, the delta V1, the minimum position and the battery charge state stored last time are read, the current battery data are monitored, and the minimum value, the minimum position and the average value of the single battery voltage after the battery management system is awakened this time are calculated.

And 5: and calculating the absolute value delta V1' of the voltage difference between the mean value of the battery single cells and the minimum value after the awakening at this time.

Step 6: calculating a difference value delta V2 between the two pressure differences, wherein the delta V2 is delta V1' -delta V1, judging whether the stored minimum position is consistent with the minimum position after the current awakening, and if so, storing a calculated value delta V2 when the current low voltage is reduced; if not, the stored value of Δ V2 is set to zero.

And 7: judgment Δ V2: if the delta V2 is larger than or equal to V3, V3 represents the maximum voltage change value of the self-discharge fault of the single body, the timing self-awakening period is set to be t 2', the counting number is stored, N is the maximum counting value; if V4< Δ V2< V3, V4 indicates the normal voltage variation value of the cell self-discharge, the timing self-wake-up period is set to t 1', and the memory count is increased by 1; if Δ V2 ≦ V4, the store count is cleared and the timed self-wakeup period is set to t 0'.

Wherein, the threshold values of V3 and V4 are set according to different battery charge states; the self-wake-up period setting value t0 ' > t1 ' > t2 '.

And 8: reading the storage count after timing self-awakening every time, if the storage count is the maximum value N1, setting a demand feedback signal 1 in the figure 3 to be 1, triggering an excitation signal 1 in the figure 3, uploading a battery fault processing signal to a vehicle control unit by activating a network management function, and simultaneously uploading battery data to a T-box; if the storage count is smaller than N1 but larger than M1, M1 indicates the self-discharge voltage change abnormal count limit value, the requirement feedback signal 1 in FIG. 3 is set to 1, the excitation signal 1 in FIG. 3 is triggered, and the battery fault early warning signal and the battery data are uploaded to the T-box by activating the network management function; if the store count is less than M1, the demand feedback signal 1 in FIG. 3 is set to 0 and the network management function is not activated.

In another embodiment, the coverage of battery insulation safety monitoring can be improved by adjusting the timing wake-up period of the battery management system in combination with the insulation resistance state of the battery system and the temperature change of the battery, and the method can include the following steps:

step 1: and after the high-voltage system is shut down, calculating the anode-to-ground insulation resistance value R1 of the battery system, the cathode-to-ground insulation resistance value R2 of the battery system, and the temperature difference delta T between the highest temperature point and the average temperature of the battery.

Step 2: the battery management system stores and records R1, R2 and delta T before voltage reduction every time.

And step 3: if R1> R0 or R2> R0, but Δ T < T0, the timed self-wake-up period is set to T0; if R0 '< R1< R0 or R0' < R2< R0, but Δ T < T0, the timed self-wake-up period is set to T1; if R0 '< R1< R0 and R0' < R2< R0, but Δ T < T0, the timed self-wake-up period is set to T2; (ii) a If R0 '< R1< R0 and R0' < R2< R0, but Δ T > T0, the timed self-wake-up period is set to T3; if R1< R0 'or R2< R0', but Δ T < T0, the timed self-wake-up period is set to T4; if R1< R0 'and R2< R0', but Δ T < T0, the timed self-wake-up period is set to T5, and if R1< R0 'and R2< R0', but Δ T > T0, the timed self-wake-up period is set to T6.

Wherein, the threshold value R0' < R0 is determined according to the insulation resistance value states of different battery packs; t0 is a temperature difference threshold value, and the thermal management capacity of the battery pack is considered for determination; and the self-awakening period setting value t0> t1> t2> t3> t4> t5> t6, and the self-awakening period is determined according to the severity of the insulation resistance value and the temperature change.

And 4, step 4: after the battery management system is awakened automatically at regular time, the current battery temperature difference delta T ' is calculated, the stored R1 and R2 are read, the current battery system anode-to-ground insulation resistance value R1 ' and the battery system cathode-to-ground insulation resistance value R2 ' are monitored, and the battery system anode-to-ground insulation resistance value change delta R1 and the battery system cathode-to-ground insulation resistance value delta R2, delta R1-R1-R1 ' and delta R2-R2-R2 ' after the battery management system is awakened at this time are calculated.

And 5: if the delta R1 is greater than 0, the calculated value of the delta R1 is stored when the voltage is reduced at the time, otherwise, the stored value of the delta R1 is set to be zero, and the storage processing mode of the delta R2 is the same as that of the delta R1.

Step 6: if the delta R1 is more than or equal to R3 or the delta R2 is more than or equal to R3, R3 represents the maximum change limit value of the insulation resistance value of the battery system, the stored count number N3 and N3 are the maximum count values; if R4< Δ R1< R3 or R4< Δ R2< R3, R4 indicates a battery system insulation normal change value, the memory count is incremented by 1; if Δ R1 ≦ R4 and Δ R2 ≦ R4, the store count is cleared.

And 7: and reading the stored count after self-awakening at regular time each time, if the stored count is the maximum value N3 and the battery temperature difference is delta T' > T0, setting a demand feedback signal 2 in the figure 3 to be 1, triggering an excitation signal 1 in the figure 3, uploading a battery system fault processing signal to the whole vehicle controller by activating a network management function, and uploading battery data to a T-box.

And 8: and (3) reading the storage count after self-awakening at each time, if the storage count is the maximum value N3 and the daisy chain communication of the battery management system is abnormal, setting a demand feedback signal 2 in the figure 3 to be 1, triggering an excitation signal 1 in the figure 3, uploading a fault processing signal of the battery system to the whole vehicle controller by activating a network management function, and uploading battery data to a T-box.

And step 9: if the storage count is smaller than N3 but larger than M3, M3 indicates the abnormal count limit value of the insulation resistance value change of the battery system, the requirement feedback signal 3 in the figure 3 is set to be 1, the excitation signal 1 in the figure 3 is triggered, and the battery fault early warning signal and the battery data are uploaded to a T-box by activating a network management function; if the store count is less than M3, the demand feedback signal 2 in fig. 3 is set to 0 and the network management function is not activated.

Fig. 5 is a flowchart of a battery monitoring method according to an embodiment of the present invention, where the battery management system is controlled to perform a self-wake-up function without changing a hardware design or increasing a system cost, the method may be executed by the abnormal self-test module 12 in the battery monitoring system according to the embodiment of the present invention, and may be implemented in a form of software and/or hardware, and the battery monitoring method may include the following steps:

step 210, battery threshold information set before the battery management system is powered off is obtained.

In the embodiment of the invention, the abnormality self-checking module acquires the battery threshold value information before the battery management system is powered off, wherein the battery threshold value information can comprise at least one of a battery temperature threshold value, a battery high voltage threshold value and a battery low voltage threshold value, and the battery threshold value information can be used for judging whether the battery is abnormal or not.

And step 220, monitoring the battery state information in real time after the battery management system is powered off.

Specifically, the abnormality self-checking module monitors battery state information in real time after the battery management system is powered off, and the battery state information may include battery voltage, battery temperature and the like.

And step 230, notifying the main control module when the fault is determined according to the battery state information and the battery threshold value information.

In the embodiment of the invention, the battery state information can be compared with the battery threshold, whether a fault occurs is determined according to the comparison result, and the main control module is informed when the fault occurs.

Further, on the basis of the above embodiment of the present invention, the notifying the main control module when determining the fault according to the battery state information and the battery threshold information includes:

when the battery state information exceeds at least one of the battery temperature threshold, the battery high voltage threshold and the battery low voltage threshold, notification information is generated to the main control module, so that the main control module generates an excitation signal 2 according to the notification information to activate a network management function, and awakens the whole vehicle to perform fault processing and fault early warning.

In an exemplary embodiment, the battery monitoring system is capable of automatically waking up the battery monitoring system when the battery monitoring system identifies the battery abnormality, so that the coverage of the battery self-waking safety monitoring is improved. The method may comprise the steps of:

step 1: the battery management system sets a battery over-temperature fault threshold, a battery over-voltage fault threshold and a battery under-voltage fault threshold before powering down at low voltage and sends the set values to the analog front end.

Step 2: after the battery management system is powered down at low voltage, the analog front end enters a low-power-consumption operation mode, and the temperature and the voltage of the battery are monitored in real time.

And step 3: when the simulation front end recognizes that the current battery temperature is higher than the set battery temperature overhigh fault threshold, or the current battery voltage is higher than the battery voltage overhigh fault threshold, or the current battery voltage is lower than the battery voltage overlow fault threshold, the battery management system is awakened, an excitation signal 2 in the figure 3 is triggered, a battery fault processing signal is uploaded to the whole vehicle controller by activating a network management function, and meanwhile, battery data is uploaded to the T-box.

Fig. 6 is a schematic structural diagram of a battery monitoring device according to an embodiment of the present invention, where the battery monitoring device according to the embodiment of the present invention can execute the battery monitoring method according to any embodiment of the present invention, and has corresponding functional modules and beneficial effects of the execution method, referring to fig. 6, the device includes: a self-test acquisition module 301, a timing determination module 302 and a fault notification module 303.

The self-checking acquisition module 301 is configured to acquire battery state information at regular time according to self-checking, where the battery state information at least includes one of battery voltage and insulation resistance.

A timing determining module 302, configured to determine the next self-test timing according to the battery state information.

And a fault notification module 303, configured to notify the main control module when a fault is determined according to the battery state information.

According to the embodiment of the invention, the battery state information is acquired by the self-checking acquisition module according to the self-checking timing, the timing determination module adjusts the self-checking timing according to the battery state information, and the fault notification module also notifies the main control module when determining the fault according to the battery state information. According to the embodiment of the invention, the self-checking period of the timing self-checking module is dynamically adjusted by using the state information, so that the accuracy of battery state acquisition can be improved, the accuracy of battery state information acquisition can be improved, and the safety failure report risk of the battery can be reduced.

Fig. 7 is a schematic structural diagram of another battery monitoring apparatus provided in an embodiment of the present invention, where the battery monitoring apparatus provided in an embodiment of the present invention can execute the battery monitoring method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects of the execution method, referring to fig. 7, the apparatus includes: a threshold acquisition module 401, an implementation monitoring module 402 and a fault notification module 403.

The threshold acquisition module 401 is configured to acquire battery threshold information set before the battery management system powers off.

A monitoring module 402 is implemented for monitoring battery status information in real time after the battery management system is powered down.

A failure notification module 403, configured to notify the main control module when a failure is determined according to the battery state information and the battery threshold information.

Fig. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present invention, where the vehicle includes the battery monitoring system according to the embodiment of the present invention. The vehicle in the embodiment of the present invention may be a hybrid vehicle, a pure electric vehicle, or a fuel vehicle, which is not limited in any way by the embodiment. The battery monitoring system includes: the system comprises a timing self-checking module, an abnormality self-checking module and a main control module; the timing self-checking module acquires battery state information according to self-checking timing and determines the next self-checking timing of the timing self-checking module according to the battery state information; the timing self-checking module also informs the main control module when determining a fault according to the battery state information; the abnormal self-checking module monitors the battery state information in real time according to a low-power-consumption running mode, and informs the main control module when determining a fault according to the battery state information; and the main control module is used for receiving the notifications of the timing self-checking module and the abnormity self-checking module and awakening the whole vehicle for fault processing.

Fig. 9 is a schematic structural diagram of a battery management system according to an embodiment of the present invention, referring to fig. 9, the battery management system may include a timed self-wake up function, an abnormal self-wake up function, a battery system insulation monitoring function, a battery system safety monitoring function, a network storage function and a data storage function, the battery management system can be formed by a main chip, a clock chip and an analog front-end sampling chip, the timing self-awakening function can be realized by the main chip and the clock chip together, namely the clock chip and the main chip together form the timing self-checking module in the embodiment of the invention, the battery management system provided by the embodiment of the invention can also realize a data storage function and a network management function by the main chip.

Fig. 10 is a schematic structural diagram of a domain control system according to an embodiment of the present invention, and referring to fig. 10, the domain control system may be formed by software and hardware, the hardware of the domain control system at least includes a main chip, a clock chip, and a virtual front end sampling chip, wherein the clock chip may be provided with a timing self-wake-up control function, and may wake up the main chip at a timing and collect an insulation resistance value, a battery voltage signal, and a battery temperature signal, and the main chip may determine a battery fault according to one or more of the insulation resistance value, the battery voltage signal, and the battery temperature signal and send an excitation signal 1 to the outside of the domain control system. The virtual front-end chip can realize an abnormal self-awakening function, can collect a battery temperature signal, a battery voltage signal and an insulation resistance value, and determines a battery fault and sends an excitation signal 2 to the outside of the domain control system by the main chip according to one or more of the insulation resistance value, the battery voltage signal and the battery temperature signal. Furthermore, the main chip can also transmit the acquired insulation resistance value, the battery voltage and the temperature data to the outside of the domain control system for storage.

Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, as shown in fig. 11, the electronic device includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of the processors 70 in the electronic device may be one or more, and one processor 70 is taken as an example in fig. 11; the processor 70, the memory 71, the input device 72 and the output device 73 in the electronic apparatus may be connected by a bus or other means, and the bus connection is exemplified in fig. 11.

The memory 71 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the battery monitoring method in the embodiment of the present invention (for example, the self-test acquisition module 301, the timing determination module 302, and the fault notification module 303 in the battery monitoring apparatus or the threshold acquisition module 401, the implementation monitoring module 402, and the fault notification module 403). The processor 70 executes various functional applications and data processing of the electronic device by executing software programs, instructions and modules stored in the memory 71, so as to implement the above-mentioned battery monitoring method.

The memory 71 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 71 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 71 may further include memory located remotely from the processor 70, which may be connected to the electronic device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input device 72 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function controls of the electronic apparatus. The output device 73 may include a display device such as a display screen.

Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a battery monitoring method, the method comprising:

acquiring battery state information at regular time according to self-checking, wherein the battery state information at least comprises one of battery voltage and insulation resistance;

determining the next self-checking timing according to the battery state information;

and informing the main control module when the fault is determined according to the battery state information.

Alternatively, the computer executable instructions, when executed by a computer processor, are for performing another battery monitoring method comprising:

acquiring battery threshold information set before a battery management system is powered off;

monitoring battery state information in real time after the battery management system is powered off;

and informing the main control module when determining the fault according to the battery state information and the battery threshold value information.

Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and may also perform related operations in the battery monitoring method provided by any embodiment of the present invention.

From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

It should be noted that, in the embodiment of the battery monitoring device, the units and modules included in the embodiment are only divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery monitoring system, comprising:

the system comprises a timing self-checking module, an abnormality self-checking module and a main control module;

the timing self-checking module acquires battery state information according to self-checking timing and determines the next self-checking timing of the timing self-checking module according to the battery state information;

the timing self-checking module also informs the main control module when determining a fault according to the battery state information;

the abnormal self-checking module monitors the battery state information in real time according to a low-power-consumption running mode, and informs the main control module when determining a fault according to the battery state information;

and the main control module is used for receiving the notifications of the timing self-checking module and the abnormity self-checking module and awakening the whole vehicle for fault processing.

2. The system according to claim 1, wherein the timing self-test module collects battery status information according to self-test timing, and determines the next self-test timing of the timing self-test module according to the battery status information, including:

the timing self-checking module wakes up the battery management system according to the self-checking timing;

the timing self-checking module controls the battery management system to acquire a voltage minimum value of at least one single battery, determines a minimum voltage position and a voltage minimum value mean value, and takes a difference value between the voltage minimum value and the voltage minimum value mean value and the minimum voltage position as the battery state information;

the timing self-checking module acquires a difference value between a minimum value of historical voltage and an average value of the minimum value of the historical voltage stored before the battery management system is powered off last time and a historical minimum voltage position as historical battery state information;

the timing self-checking module compares the battery state information with the historical battery state information to determine the degree of change of the battery;

and the timing self-checking module determines the self-checking timing of the timing self-checking module next time according to the battery change degree.

3. The system according to claim 2, wherein the timing self-test module determines the timing of the next self-test of the timing self-test module according to the degree of change of the battery, and the determining comprises:

if the minimum voltage position is different from the historical minimum voltage position, the timing self-checking module stores the difference value between the historical voltage minimum value and the historical voltage minimum value mean value as 0;

when the difference between the voltage minimum value and the voltage minimum value average value and the difference between the historical voltage minimum value and the historical voltage minimum value average value is larger than or equal to a first threshold voltage, setting a voltage storage count as a maximum threshold value by the timing self-checking module, and setting the self-checking timing as a first duration;

when the difference between the voltage minimum value and the voltage minimum value average value and the difference between the historical voltage minimum value and the historical voltage minimum value average value is smaller than a first threshold voltage and larger than a second threshold voltage, the timing self-checking module adds 1 to a voltage storage count, and sets the self-checking timing to be a second time length;

when the difference between the minimum voltage value and the average voltage value and the difference between the minimum historical voltage value and the average historical voltage value is smaller than or equal to a second threshold voltage, the timing self-checking module clears the voltage storage count and sets the self-checking timing to be a third time length;

wherein the first duration, the second duration, and the third duration are sequentially increased.

4. The system according to claim 1 or 3, wherein the timing self-test module further notifies the main control module when determining a fault according to the battery status information, and the method comprises:

the timing self-checking module acquires a voltage storage count corresponding to the battery state information;

when the storage count is greater than or equal to the failure threshold number of times, generating notification information to the main control module;

and the main control module generates an excitation signal 1 according to the notification information to activate a network management function and awaken the whole vehicle to perform fault processing and fault early warning.

5. The system according to claim 1, wherein the timing self-test module collects battery status information according to self-test timing, and determines the next self-test timing of the timing self-test module according to the battery status information, including:

the timing self-checking module controls the battery management system to acquire a positive electrode ground insulation resistance value and a negative electrode ground insulation resistance value of a battery system, and a first temperature difference between the highest temperature and the average temperature of a battery in the battery system as battery state information;

and the timing self-checking module determines the self-checking timing of the timing self-checking module next time according to the size relationship between the battery state information and the threshold parameter.

6. The system according to claim 5, wherein the timing self-test module determines the self-test timing of the timing self-test module next time according to the magnitude relationship between the battery state information and the threshold parameter, and the determining comprises:

the timing self-checking module obtains a first insulation resistance threshold, a second insulation resistance threshold and a temperature difference threshold in the threshold parameter, wherein the first insulation resistance threshold is smaller than the second insulation resistance threshold, and the first insulation resistance threshold and the second insulation resistance threshold are determined by a safety insulation resistance range of the battery system;

the timing self-checking module determines a positive pole size relationship, a negative pole size relationship and a temperature difference size relationship, which respectively correspond to the first insulation resistance value threshold, the second insulation resistance value threshold and the temperature difference threshold in the threshold parameter, respectively, and the positive pole ground insulation resistance value R1, the negative pole ground insulation resistance value R2 and the first temperature difference in the battery state information;

7. The system according to claim 1 or 5, wherein the timing self-test module further notifies the main control module when determining a fault according to the battery status information, and the method comprises:

the timing self-checking module also obtains stored historical positive pole ground insulation resistance values, historical negative pole ground insulation resistance values, historical first temperature differences and resistance value storage counts;

the timing self-checking module determines a positive electrode difference value, a negative electrode difference value and a temperature difference value which respectively correspond to the historical positive electrode ground insulation resistance value, the historical negative electrode ground insulation resistance value and the historical first temperature difference value respectively;

when the positive pole difference value is larger than zero, the timing self-checking module saves the positive pole ground insulation value as the historical positive pole ground insulation value, otherwise, the historical positive pole ground insulation value is set to zero;

when the negative difference value is larger than zero, the timing self-checking module saves the negative earth insulation value as the historical negative earth insulation value, otherwise, the historical negative earth insulation value is set to zero;

when the positive difference value and/or the negative difference value are/is larger than or equal to insulation change limit, the timing self-checking module sets the resistance value storage count to be a maximum count value;

when the positive pole difference value and/or the negative pole difference value are smaller than the insulation change limit and larger than an insulation normal value, the timing self-checking module increases the resistance value storage count by 1;

when the positive difference value and/or the negative difference value are/is smaller than the insulation normal value, the timing self-checking module clears the resistance value storage count;

when the timing self-checking module judges that the resistance value storage count is greater than or equal to the maximum count value and the temperature difference value is greater than zero, generating notification information to the main control module;

8. The system of claim 2 or 5, further comprising:

and the timing self-checking module takes the minimum value of the self-checking timing determined according to the battery change degree and the self-checking timing determined according to the size relationship as the next self-checking timing.

9. The system of claim 1, wherein the abnormal self-test module monitors the battery status information in real time according to a low power consumption operation mode, and notifies the main control module when determining a fault according to the battery status information, comprising:

the abnormality self-checking module acquires a battery temperature threshold, a battery high voltage threshold and a battery low voltage threshold which are set before the battery management system is powered off;

after the battery management system is powered off, the abnormal self-checking module enters a low-power-consumption running mode and monitors the battery state information in real time;

when the battery state information exceeds at least one of the battery temperature threshold, the battery high voltage threshold and the battery low voltage threshold, generating notification information to the main control module;

and the main control module generates an excitation signal 2 according to the notification information to activate a network management function and awaken the whole vehicle to perform fault processing and fault early warning.

10. The system according to claim 1, wherein the main control module is configured to receive the notifications of the timing self-checking module and the abnormal self-checking module, and wake up the entire vehicle for fault handling, and the system includes:

the main control module carries out working state when receiving the communication information of the timing self-checking module and the abnormal self-checking module;

the main control module activates a network management function, uploads battery fault processing information corresponding to the notification information to the vehicle control unit and uploads battery data corresponding to the notification information to the remote communication box.

11. The system according to claim 1, wherein the main control module is further configured to verify the battery status information collected by the timing self-test module and the anomaly self-test module.

12. A battery monitoring method is applied to a timing self-checking module, and comprises the following steps:

13. A battery monitoring method is applied to an abnormal self-checking module, and comprises the following steps:

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the battery monitoring method according to any one of claims 12 or 13.

15. A vehicle, characterized in that the vehicle comprises a battery monitoring system according to any one of claims 1-11.