CN114407658B

CN114407658B - Battery monitoring system, method, vehicle and storage medium

Info

Publication number: CN114407658B
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: 2023-10-03
Anticipated expiration: 2041-12-31
Also published as: CN114407658A

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 abnormal self-checking module and a main control module; the timing self-checking module acquires battery state information according to self-checking time, and determines the next self-checking time 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 faults 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 operation mode, and notifies the main control module when the fault is determined according to the battery state information; the main control module is used for receiving the notification of the timing self-checking module and the abnormal self-checking module and waking up the whole vehicle to perform fault processing. 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 battery safety missing report risk 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, market demands of electric automobiles are gradually expanded, and energy demands of power batteries are gradually increased, so that the energy density of the power batteries is required to be high, and coverage of safety monitoring functions of the power batteries becomes an important factor for restricting safety of vehicles. At present, the safety monitoring of the power battery by the battery management system can cover the periods of vehicle running, vehicle charging and the like, but a larger monitoring blank period exists in the parking and dormant state of the vehicle.

In order to improve the coverage of the safety monitoring function of the power battery, the method is mainly realized by the following technology: the vehicle battery management system is awakened to perform corresponding fault treatment measures after the sensor detects abnormal values through sensors such as a pressure sensor, a smoke sensor and the like outside the vehicle; one type is to wake up the battery management system at regular time by using a remote communication box (T-box) to complete the battery safety monitoring; another type 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 regular wake-up of the whole vehicle needs to coordinate a plurality of controllers to complete the monitoring function, so that the risk of potential function failure is increased, and the risk of false failure or missing report of the power battery system exists; the addition of the peripheral sensors not only increases the manufacturing cost of the vehicle, but also increases the number of the vehicle sensors, and further increases the risk of potential functional failure of the vehicle.

Disclosure of Invention

The invention provides a battery monitoring system, a method, a vehicle and a storage medium, which are used for realizing the self-checking of a battery by dynamically waking up a battery management system, 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 abnormal self-checking module and a main control module; the timing self-checking module acquires battery state information according to self-checking time, and determines the next self-checking time 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 operation mode, and notifies the main control module when a fault is determined according to the battery state information; the main control module is used for receiving the notification of the timing self-checking module and the abnormal self-checking module and waking up the whole vehicle to perform 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 according to self-checking, wherein the battery state information at least comprises one of battery voltage and insulation resistance; determining the next self-checking time according to the battery state information; and notifying a 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, including:

acquiring battery threshold information set before power-down of a battery management system; monitoring battery state information in real time after the battery management system is powered down; and informing a main control module when determining faults according to the battery state information and the battery threshold 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, when executed by a processor, implements 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 abnormal self-checking module and a main control module, wherein the timing self-checking module is used for collecting battery state information according to self-checking, setting the next self-checking time by using the collected battery state information, notifying the main control module when determining faults according to the collected battery state information, the abnormal self-checking module is used for monitoring the battery state information in real time under a low-power running model, notifying the main control module when determining the faults according to the battery state information, and the main control module is used for receiving the notification information of the timing self-checking module and the abnormal self-checking module to wake up 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 use period of the battery through the timing self-checking module and the abnormal self-checking module, and can improve the accuracy of battery state acquisition by dynamically adjusting the self-checking period of the timing self-checking module by using the state information and monitoring in real time through the low-power consumption abnormal self-checking module, thereby improving the accuracy of battery state information acquisition and reducing the risk of battery safety missing report.

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 according to 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 method for monitoring a battery 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 according to an embodiment of the present invention;

fig. 8 is a schematic structural view 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 invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings, and furthermore, embodiments of the present invention and features in 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 embodiment of the present invention is applicable to a case of battery safety monitoring, the method may be performed by the battery monitoring system, the system may be implemented by a software and/or hardware device, the battery monitoring system may be implemented based on one or more chips, and referring to fig. 1, the system provided in the embodiment of the present invention specifically includes: the system comprises a timing self-checking module 11, an abnormal self-checking module 12 and a main control module 13; the timing self-checking module 11 collects battery state information according to self-checking time, and determines the next self-checking time of the timing self-checking module 11 according to the battery state information; the timing self-checking module 11 also notifies the main control module 13 when determining a fault according to the battery state information; 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 the fault is determined according to the battery state information; the main control module 13 is used for receiving the notification of the timing self-checking module 11 and the abnormal self-checking module 12 and waking up the whole vehicle to perform fault processing.

The timing self-checking module 11 may be a device with a timing wake-up function, which may be located in an embedded device or a chip, where the timing self-checking module 11 may wake up from a sleep state to a working state according to a set self-checking time, and perform safety 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-checking module 11, and the program can verify the battery status information collected in the self-checking process and notify the main control module 13 when determining a fault, where the battery status information may be attribute information of the battery collected by the timing self-checking module 11, and may include current, voltage, temperature, insulation resistance value and the like of the battery. The timing self-checking module 11 can interact with the main control module 13 in a hard wire or wireless connection mode, and can inform the main control module 13 of faults, 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 status information detected in each self-checking process, and different battery status information may correspond to the self-checking timing of different durations, for example, when the battery status information indicates that the battery system is healthy, the timing self-checking module 11 may detect the battery status information at a longer self-checking timing, and when the battery status information indicates that the battery system is close to a fault, the timing self-checking module 11 may detect the battery status information at a shorter self-checking timing.

Specifically, the abnormal self-checking module 12 in the battery monitoring system can monitor the battery system in real time, and after other modules are powered down, the abnormal self-checking module 12 can operate in a low-power consumption mode. The abnormal self-checking module 12 may be integrated with the battery system or the vehicle control system, and the abnormal self-checking module 12 may also perform fault detection on the detected battery status information, notify the main control module 13 when determining that the battery system fails, and wake up the main control module 13 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 responds to 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-checking module 11 and the abnormal self-checking module 12 in a wired or wireless manner, the main control module 13 may receive notifications of the timing self-checking module 11 and the abnormal self-checking module 12, and the notifications may be in a form of digital signals or analog signals, for example, when the main control module 13 receives a high level signal sent by the timing self-checking module 11 or the abnormal self-checking module 12, the main control module 13 may perform a working state in a sleep state, and execute the high level signal to trigger the main control module 13 to trigger a whole vehicle to wake up, and the main control module 13 may send control information to other devices of the whole vehicle to implement a 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 based on the above embodiment of the present invention, referring to fig. 2, the timing self-checking module 11 in the embodiment of the present invention may adjust the self-checking timing of the next use through the battery voltage and/or insulation resistance value in the battery status information. When using battery voltage to adjust self-test, including: the timing self-checking module 11 in the system provided by the embodiment of the invention wakes up the battery management system 14 according to self-checking timing; the timing self-checking module 11 controls the battery management system 14 to collect the voltage minimum value of at least one single battery, determines the minimum voltage position and the average value of the voltage minimum value, and takes the difference value between the voltage minimum value and the average value of the voltage minimum 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 a mean value of the minimum value of the historical voltage stored before the last power-down of the battery management system 14 and a position of the minimum voltage as historical battery state information; the timing self-checking module 11 compares the battery state information with the historical battery state information to determine the battery change degree; the timing self-checking module 11 determines the self-checking timing of the next time of the timing self-checking module 11 according to the battery variation degree.

In the embodiment of the present invention, the timing self-checking module 11 may use a clock to time in the sleep state, and when the clock times to a time length corresponding to the self-checking time, the timing self-checking 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, where the system for managing the battery by the battery management system 14 generally has a function of measuring a battery voltage, a battery temperature, and an insulation resistance value, and may prevent or avoid abnormal situations such as overdischarge, overcharge, and over-temperature of the battery from occurring. As battery technology has evolved, battery management system 14 has also gradually increased many corresponding functions. The battery management system 14 may detect each of the unit batteries to obtain a minimum voltage value, a minimum voltage position, and a mean value of the minimum voltage values of the unit batteries. The battery system detected by the battery monitoring system may be composed of a plurality of unit batteries, each battery may have respective battery state information, the battery management system 14 may measure the battery state information of each unit battery, the minimum voltage may be the minimum voltage that each unit battery may reach, the minimum voltage position may be identification information or position information of the unit voltage with the minimum value in the minimum voltage values, and the minimum voltage average may be the average value of the minimum voltage values. The battery management system 14 may collect the voltage minimum value of each unit battery, determine the minimum voltage position and the voltage minimum average value, and may use the difference between each voltage minimum value and the voltage minimum average 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 the battery state information collected by the timing self-checking module 11 during the previous self-checking 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 value between a minimum historical voltage value and a mean value of the minimum historical voltage value during the previous self-checking process and a location of the minimum historical voltage.

The timing self-checking module 14 can read the historical battery state information stored in the storage medium, compare the battery state information acquired this time with the historical battery state information, determine the battery change degree according to the change trend of the numerical value, and determine the self-checking timing of the next use according to the battery change degree. For example, the historical battery state information has a smaller value than the battery state information, and the minimum voltage position changes, which indicates that the health state of the battery system is deteriorated, and the time length can be reduced when a smaller self-test is performed or on the basis of the self-test; the historical battery state information has a value larger than that of the battery state information, and the minimum voltage position is unchanged, so that the state of health of the battery system is restored, and a larger self-checking time can be taken, or the time length is increased on the basis of the self-checking time; the historical battery state information is equal to the battery state information, which indicates that the battery state has no obvious change, and the self-checking time used at this time can be selected.

Further, on the basis of the above embodiment of the present invention, the timing self-checking module 11 determines, according to the battery change degree, a self-checking timing of the timing self-checking module 11 next time, including:

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 value as the difference value between the minimum historical voltage value and the average value of the minimum historical voltage value;

if the minimum voltage position is different from the historical minimum voltage position, the timing self-checking module 11 stores a difference value between the historical minimum voltage value and the average value of the historical minimum voltage 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 the voltage storage count as a maximum threshold value by the timing self-checking module, and setting the self-checking time 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 the first threshold voltage and larger than the second threshold voltage, the timing self-checking module increases the voltage storage count by 1, and the self-checking time is set to be a second 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 or equal to the second threshold voltage, the timing self-checking module clears the voltage storage count, and sets the self-checking time as a third duration; 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 select, according to the battery change degree, the corresponding duration as the self-checking time according to the comparison result of 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 comparison, it indicates that no additional discharge condition occurs in the battery system, and the timing self-checking module 11 may store, as the historical battery state information, the difference between the voltage minimum value and the voltage minimum value average value in the battery state information in the storage medium of the battery monitoring system. In contrast, if the minimum voltage position is different from the historical minimum voltage position, it is indicated that there is a voltage drop of the unit battery in the battery system, and the difference between the historical voltage minimum value and the average value of the historical voltage minimum value in the storage medium in the battery monitoring system is stored as 0.

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

In a similar manner as described above, when the difference between the voltage minimum value and the average value of the voltage minimum values and the difference between the minimum value of the historical voltage and the minimum value of the historical voltage is smaller than the first threshold voltage and larger than the second threshold voltage, which may be the minimum value of the normal voltage range of the single battery, and when the battery variation degree obtained by the timing self-checking module 11 is smaller than the first threshold voltage and larger than the second threshold voltage, that is, the voltage normal range is exceeded but the fault state is not reached, the voltage storage count may be increased, and the self-checking time is set to the second duration, it may be understood that the second duration is longer than the first duration in duration.

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

In the embodiment of the present invention, the timing self-checking module 11 adjusts the self-checking timing by using the insulation resistance value, including: the self-checking module 11 wakes up the battery management system 14 according to self-checking timing; the timing self-checking module 11 controls the battery management system 14 to acquire the positive electrode ground insulation resistance and the negative electrode ground insulation resistance 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; the timing self-checking module 11 determines the next self-checking time 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 whole positive electrode ground resistance value of the battery system, the negative electrode ground insulation resistance value can be the whole negative electrode ground resistance value of the battery system, the first temperature difference can be the temperature difference between the highest temperature point in the battery system and the average temperature, the highest temperature of the battery can be the battery temperature of one or a plurality of 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 all single batteries in the battery system. The threshold parameters can be parameters for distinguishing the states of the battery system, the threshold parameters with different values can reflect different states of the battery system about the insulation resistance, the threshold parameters can be determined by the type and the size of the battery system, and the threshold parameters 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-checking module 11 may use a clock to time in the sleep state, and when the clock times to the duration corresponding to the self-checking time, the timing self-checking module 11 may perform the 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 the positive electrode insulation to ground resistance and the negative electrode insulation to ground resistance of the battery system, and may also collect the battery maximum temperature and the battery temperature of each unit battery in the battery system, the battery management system 14 may calculate the average temperature using the battery temperature of each unit battery, determine the first temperature difference between the battery maximum temperature and the average temperature, and may use the first temperature difference, the positive electrode insulation to ground resistance, and the negative electrode insulation to ground resistance as battery status information.

Specifically, after the timing self-checking module 11 obtains the battery state information, the battery state information may be compared with the threshold parameter to determine the battery state according to the battery state information, and when the self-checking module 11 determines the next self-checking according to the battery state collection, it may be understood that the threshold parameter may be divided into a plurality of levels of threshold parameter values, each level may correspond to different battery state information, and when the battery state information satisfies the threshold parameter of a certain level, the self-checking time may be determined according to the level corresponding to the threshold parameter.

Further, on the basis of the above embodiment of the present invention, the determining, by the timing self-checking module, 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 includes:

the timing self-checking module 11 acquires 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 relation, a negative pole size relation and a temperature difference size relation of a positive pole ground insulation resistance R1, a negative pole ground insulation resistance R2 and a first temperature difference in battery state information, which correspond to a first insulation resistance threshold value, a second insulation resistance threshold value and a temperature difference threshold value in threshold parameters respectively;

and searching corresponding timing time length in a preset timing information table according to the positive pole size relation, the negative pole size relation and the temperature difference size relation to serve as the next self-checking time.

The first insulation resistance threshold may be a fault threshold of the positive electrode insulation resistance to ground, the second insulation resistance threshold may be a fault threshold of the negative electrode insulation resistance to ground, the temperature difference threshold may be a fault threshold of the first temperature difference, and the fault risk may be considered to exist when the threshold of the threshold parameter is exceeded in the battery state information.

In the embodiment of the invention, the battery state information and the threshold parameter can be compared to determine the orthogonal magnitude relation between the positive electrode ground insulation resistance R1 and the first insulation resistance threshold, the negative electrode magnitude relation between the negative electrode ground insulation resistance R2 and the second insulation resistance threshold and the temperature difference magnitude relation between the first temperature difference and the temperature difference threshold, one or more of the positive electrode magnitude relation, the negative electrode magnitude relation and the temperature difference magnitude relation can be used for searching the corresponding timing time length in the preset timing information table as self-checking, and the preset timing information table can be preset and store different conditions of the positive electrode magnitude relation, the negative electrode magnitude relation and the temperature difference magnitude relation in an associated mode with different timing time lengths.

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

In the embodiment of the present invention, the timing self-checking module 11 may use the battery state information to perform fault discrimination corresponding to 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 level, and then fault wake-up may be performed. The wake-up process may include the timing self-checking module 11 transmitting notification information to the main control module 13, waking up the main control module 13, so that the main control module 13 generates the excitation signal 1, and activates the network management function of the whole vehicle, and failure fault handling and fault early warning are performed through the network management function, for example, uploading fault information to the T-box by using the network management function, or transmitting trigger information to the whole vehicle controller, and triggering the whole vehicle controller to perform fault handling and fault early warning.

In another aspect, the notifying the main control module when the battery fault is determined according to the insulation resistance value may include: the timing self-checking module 11 also acquires a stored historical positive electrode insulation resistance to ground, a historical negative electrode insulation resistance to ground, a historical first temperature difference and a resistance value storage count; the timing self-checking module 11 determines positive electrode ground insulation resistance, negative electrode ground insulation resistance and first temperature difference in the battery state information, and positive electrode difference value, negative electrode difference value and temperature difference value corresponding to the historical positive electrode ground insulation resistance, the historical negative electrode ground insulation resistance and the historical first temperature difference value respectively; under the condition that the positive electrode difference value is larger than zero, the timing self-checking module 11 stores the positive electrode ground insulation value as a historical positive electrode ground insulation value, otherwise, the historical positive electrode ground insulation value is set to zero; under the condition that the difference value of the cathodes is larger than zero, the timing self-checking module stores the cathode ground insulation value as a historical cathode ground insulation value, otherwise, the historical cathode ground insulation value is set as zero; when the positive electrode difference value and/or the negative electrode difference value is greater than or equal to the insulation change limit, the timing self-checking module sets the resistance value storage count as a count maximum value; when the positive electrode difference value and/or the negative electrode 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 electrode difference value and/or the negative electrode difference value 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 count maximum value and the temperature difference value is greater than zero, notification information is generated to the main control module; the main control module generates an excitation signal 1 according to the notification information to activate a network management function, and wakes the whole vehicle to perform fault processing and fault early warning.

The resistance value storage count may be the maximum tolerance of the battery due to insulation resistance value change, the number of times of insulation resistance value deterioration may be counted by the resistance value storage count, the historical positive electrode insulation resistance value to ground, the historical negative electrode insulation resistance value to ground, and the historical first temperature difference may be battery state information collected by the last timing self-checking module 11, and may 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 battery insulation resistance values.

In the embodiment of the present invention, the timing self-checking module 11 may acquire the stored historical positive electrode insulation to ground resistance, historical negative electrode insulation to ground resistance, historical first temperature difference and resistance storage count as historical battery status information, compare the battery status information with the historical battery status information, determine corresponding positive electrode difference value, negative electrode difference value and temperature difference value, and store the positive electrode insulation to ground group or negative electrode insulation to ground resistance when the positive electrode difference value or the negative electrode difference value is greater than zero, otherwise, set the historical positive electrode insulation to ground resistance or the historical negative electrode insulation to ground resistance to 0. At least one of the negative electrode difference value and the positive electrode difference value is larger than an insulation change threshold value, the resistance value storage count is set to be the maximum count, at least one of the negative electrode difference value and the positive electrode difference value is smaller than the insulation change threshold value but larger than an insulation normal value, the resistance value storage count is increased, and the resistance value storage count is cleared when the negative electrode difference value or the positive electrode difference value is smaller 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 value of the count and the difference in temperature is greater than zero, notification information is generated 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 generates an excitation signal 1, the network management function of the whole vehicle is activated, and failure fault processing and fault early warning are performed through the network management function.

Further, on the basis of the embodiment of the invention, the method further comprises the following steps: the timing self-check module 11 takes the minimum value of the self-check timing determined according to the battery variation degree and the self-check timing determined according to the magnitude relation as the next self-check timing.

Specifically, when the timing self-checking module 11 determines a fault at the same time by using the voltage and the resistor, it can determine the self-checking time of two different durations, that is, the self-checking time determined by the battery variation degree and the self-checking time determined by the magnitude relation, and the self-checking time with the minimum value in the two can be used as the self-checking time of the next use of the timing self-checking module 13.

Further, on the basis of the above embodiment of the present invention, the anomaly self-checking module 12 monitors the battery status 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 status information, including:

the abnormal self-checking module 12 acquires a battery temperature threshold value, a battery high-voltage threshold value and a battery low-voltage threshold value which are set before the battery management system is powered down; the abnormal self-checking module enters a low-power-consumption operation mode after the battery management system is powered down and monitors battery state information in real time; generating notification information to the main control module 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; the main control module generates an excitation signal 2 according to the notification information to activate a network management function and wake up the whole vehicle to perform fault processing and fault early warning.

In the embodiment of the present invention, the abnormal self-checking module 12 monitors the battery system in real time, acquires the battery temperature threshold, the battery high voltage threshold and the battery low voltage threshold before each time the battery management system is powered down, uses the battery state information acquired after the power down to distinguish, and when at least one of the battery temperature and the battery high voltage in the battery state information does not meet the threshold, 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, determines that the battery system is faulty, and can generate notification information 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 the whole vehicle for fault handling and fault early warning.

Further, on the basis of the embodiment of the present invention, the main control module is configured to receive the notification of the timing self-checking module and the abnormal self-checking module, and wake up the whole vehicle to perform fault processing, including: the main control module is used for 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, and uploads battery fault processing information corresponding to the notification information to the whole vehicle controller and uploads battery data corresponding to the notification information to the remote communication box.

In an exemplary implementation manner, fig. 3 is an exemplary diagram of a battery monitoring system provided by the embodiment of the present invention, and referring to fig. 3, the battery monitoring system may implement self-wake-up security monitoring of a battery management system when a vehicle is dormant, including a timed wake-up control and an abnormal wake-up control, where the timed wake-up control is to wake up through a clock chip of the battery management system by setting a timed wake-up period, and the abnormal wake-up control is to collect battery voltage and temperature information through an analog front end of the battery management system, and wake up the battery management system when an abnormality in battery voltage and temperature is identified. The defect of safety monitoring coverage of independent self-awakening by the timing of the 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 deficiency when the clock chip fails can be avoided.

The method comprises the steps of monitoring data such as battery voltage, temperature, insulation resistance of a battery system, low-voltage storage battery voltage and the like in a battery management system timing awakening process, starting corresponding safety monitoring functions (such as starting switches 1 and 2 in fig. 3), if an abnormal state is judged in the corresponding safety monitoring functions, feeding back a demand signal to a timing awakening control function (such as demand feedback signals 1 and 2 in fig. 3), outputting an excitation signal 1 to a network management function of the battery management system in combination with the feedback signal, completing functional interaction with a 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 recognizes that the voltage and the temperature of the battery are abnormal, the battery management system enters an abnormal self-wake-up control function, triggers the excitation signal 2 to be output to a network management function, completes functional interaction with a whole vehicle controller, 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 method is implemented to perform self-wake-up function control on a battery management system without changing a hardware design or increasing a system cost, and the method may be performed by the timing self-checking 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 form, and the battery monitoring method may include the following steps:

and 110, acquiring battery state information 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-checking module can enter a working state according to self-checking 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.

Step 120, determining the next self-test time according to the battery state information.

Specifically, the state of health of the battery system can be determined through the battery state information, and the self-checking time of the timing self-checking module can be determined according to the state of health adjustment.

And 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 send notification information to the main control module when the battery state information is used for determining the fault, wake up the main control module and execute fault processing operation.

According to the embodiment of the invention, the battery state information is collected according to the self-checking time, the self-checking time is adjusted according to the battery state information, and the main control module is notified when the fault is determined according to the battery state information. The embodiment of the invention dynamically adjusts the self-checking period of the timing self-checking module by using the state information, can improve the accuracy of battery state acquisition, improves the accuracy of battery state information acquisition and reduces the risk of battery safety missing report.

Further, on the basis of the embodiment of the present invention, collecting battery state information according to self-test time, and determining a next self-test time according to the battery state information includes:

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

Further, on the basis of the above embodiment of the present invention, determining the self-test time of the timing self-test module next time according to the battery change 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 value as the difference value between the minimum historical voltage value and the average value of the minimum historical voltage value;

if the minimum voltage position is different from the historical minimum voltage position, storing a difference value between the historical minimum voltage value and a historical minimum voltage value mean value as 0;

setting a voltage storage count to a maximum threshold value and setting the self-test time to a first duration when a difference between the voltage minimum and the voltage minimum average and a difference between the historical voltage minimum and the historical voltage minimum average is 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 time to be a second 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 or equal to a second threshold voltage, resetting the voltage storage count, and setting the self-checking time to be a third duration; wherein the first duration, the second duration, and the third duration are sequentially increased.

Further, on the basis of the embodiment of the present invention, notifying the main control module when determining a fault according to the battery status information includes: acquiring voltage storage counts corresponding to the battery state information; and when the storage count is greater than or equal to the fault threshold number, 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 waking up the whole vehicle to perform fault processing and fault early warning.

Further, on the basis of the embodiment of the present invention, collecting battery state information according to self-test time, and determining a next self-test time according to the battery state information includes: waking up a battery management system according to the self-checking timing; controlling the battery management system to acquire the positive electrode insulation resistance and the negative electrode insulation resistance of the battery system, and taking the first temperature difference between the highest temperature and the average temperature of the battery in the battery system as the battery state information; and determining the next self-checking time of the timing self-checking module according to the size relation between the battery state information and the threshold parameter.

Further, on the basis of the above embodiment of the present invention, determining the next self-test time of the timing self-test module according to the magnitude relation 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 electrode size relation, a negative electrode size relation and a temperature difference size relation of the positive electrode ground insulation resistance R1, the negative electrode ground insulation resistance R2 and the first temperature difference in the battery state information, which correspond to the first insulation resistance threshold, the second insulation resistance threshold and the temperature difference threshold in the threshold parameter respectively; and searching corresponding timing time length in a preset timing information table according to the positive pole size relation, the negative pole size relation and the temperature difference size relation to serve as the next self-checking time.

Further, on the basis of the embodiment of the present invention, notifying the main control module when determining a fault according to the battery status information includes: acquiring a stored historical positive electrode ground insulation resistance value, a historical negative electrode ground insulation resistance value, a historical first temperature difference and a resistance value storage count; determining positive electrode insulation resistance, negative electrode insulation resistance and first temperature difference in the battery state information, wherein the positive electrode insulation resistance, the negative electrode insulation resistance and the first temperature difference correspond to the historical positive electrode insulation resistance, the historical negative electrode insulation resistance and the historical first temperature difference respectively; under the condition that the positive electrode difference value is larger than zero, the positive electrode ground insulation value is stored as the historical positive electrode ground insulation value, otherwise, the historical positive electrode ground insulation value is set as zero; under the condition that the negative electrode difference value is larger than zero, the negative electrode ground insulation value is stored as the historical negative electrode ground insulation value, otherwise, the historical negative electrode ground insulation value is set as zero; when the positive electrode difference value and/or the negative electrode difference value is greater than or equal to an insulation change limit, setting the resistance storage count as a count maximum value; when the positive electrode difference value and/or the negative electrode difference value is smaller than the insulation change limit and larger than an insulation normal value, increasing the resistance value storage count by 1; when the positive electrode difference value and/or the negative electrode difference value is smaller than the insulation normal value, resetting the resistance value storage count; and generating notification information to the main control module when judging that the resistance storage count is greater than or equal to the count maximum value and the temperature difference value is greater than zero, so that an excitation signal 1 is generated according to the notification information to activate a network management function, and waking up the whole vehicle to perform fault processing and fault early warning.

In an exemplary embodiment, the method adjusts a timed wake-up period of a battery management system according to the self-discharge degree of a battery cell, improves the diagnostic coverage of early warning of the self-discharge fault of the battery cell of the battery system, and specifically comprises the following steps:

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

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.

Step 3: the battery management system stores and records DeltaV 1 and the minimum value position before each low-voltage power-down.

Step 4: after the battery management system wakes up, the delta V1, the minimum value position and the battery charge state which are stored last time are read, current battery data are monitored, and the minimum value, the minimum value position and the average value of the battery cell voltage after the wake-up are calculated.

Step 5: and calculating the absolute value delta V1' of the voltage difference between the average value and the minimum value of the battery cells after the wake-up.

Step 6: calculating a difference value delta V2 of the two differential pressures, wherein delta V2=delta V1' -delta V1, judging whether the stored minimum value position is consistent with the minimum value position after the wake-up, and if so, storing a calculated value of delta V2 when the low voltage is applied; if not, the stored value of DeltaV 2 is set to zero.

Step 7: judging delta V2: if DeltaV 2 is more than or equal to V3, V3 represents the maximum voltage change value of the self-discharge fault of the monomer, the self-wake-up period is set to t2', and a counting record N is stored, wherein N is the maximum value of the counting; if V4< DeltaV 2< V3, V4 represents the change value of the monomer self-discharge normal voltage, the self-wake-up period is set to t1', and the storage count is increased by 1; if ΔV2 is less than or equal to V4, the storage count is cleared, and the timed self-wakeup period is set to t0'.

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

Step 8: reading a storage count after each time of self-wakeup, if the storage count is the maximum value N1, setting a demand feedback signal 1 in the graph 3 to be 1, triggering an excitation signal 1 in the graph 3, uploading a battery fault processing signal to a whole vehicle controller by activating a network management function, and uploading battery data to a T-box; if the stored count is smaller than N1 but larger than M1, M1 represents the abnormal count limit value of the self-discharge voltage variation, a demand feedback signal 1 in FIG. 3 is set to be 1, an excitation signal 1 in FIG. 3 is triggered, and a battery fault early warning signal and battery data are uploaded to a T-box through activating a network management function; if the memory 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 method for adjusting the wake-up period of the battery management system in combination with the insulation resistance state of the battery system and the battery temperature change can improve the coverage of the insulation safety monitoring of the battery, and the method can comprise the following steps:

step 1: after the high-voltage system is closed, the positive electrode insulation resistance R1 and the negative electrode insulation resistance R2 of the battery system and the temperature difference delta T between the highest temperature point and the average temperature of the battery are calculated.

Step 2: the battery management system stores and records R1, R2 and delta T before each low voltage power down.

Step 3: if R1> R0 or R2> R0, but ΔT < T0, the timed self-wakeup period is set to T0; if R0'< R1< R0 or R0' < R2< R0, but ΔT < T0, the timed self-wake-up period is set to T1; if R0'< R1< R0 and R0' < R2< R0, but ΔT < T0, the timed self-wake-up period is set to T2; the method comprises the steps of carrying out a first treatment on the surface of the If R0'< R1< R0 and R0' < R2< R0, but ΔT > T0, the timed self-wake-up period is set to T3; if R1< R0 'or R2< R0', but DeltaT < T0, the timed self-wakeup period is set to T4; the timed self-wake-up period is set to T5 if R1< R0 'and R2< R0', but DeltaT < T0, and T6 if R1< R0 'and R2< R0', but DeltaT > T0.

Wherein, the threshold value R0' < R0 is determined according to the insulation resistance state of different battery packs; t0 is a temperature difference threshold value, and is determined by considering the thermal management capability of the battery pack; the self-wake-up period is determined according to the insulation resistance value and the severity of the temperature change by the self-wake-up period setting value t0> t1> t2> t3> t4> t5> t6.

Step 4: after the battery management system is self-awakened at regular time, calculating the current battery temperature difference delta T ', reading R1 and R2 stored last time, monitoring the current battery system positive electrode ground insulation resistance R1' and the battery system negative electrode ground insulation resistance R2', and calculating the battery system positive electrode ground insulation resistance change delta R1 and the battery system negative electrode ground insulation resistance delta R2 after the awakening, wherein delta R1=R1-R1 ', and delta R2=R2-R2 '.

Step 5: if Δr1>0, storing the calculated value of Δr1 at this time of low voltage, otherwise, setting the stored value of Δr1 to zero, and storing Δr2 in the same manner as Δr1.

Step 6: if DeltaR 1 is more than or equal to R3 or DeltaR 2 is more than or equal to R3, R3 represents the maximum change limit value of the insulation resistance value of the battery system, and the stored count N3 and N3 are the maximum count value; if R4< DeltaR 1< R3 or R4< DeltaR 2< R3, R4 represents a normal change value of the insulation of the battery system, the stored count is increased by 1; if ΔR1 is less than or equal to R4 and ΔR2 is less than or equal to R4, the storage count is cleared.

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

Step 8: and reading the storage count after each time of self-wakeup, 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 as 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.

Step 9: if the storage count is smaller than N3 but larger than M3, M3 represents the abnormal count limit value of the insulation resistance change of the battery system, a demand feedback signal 3 in FIG. 3 is set to be 1, an excitation signal 1 in FIG. 3 is triggered, and a battery fault early warning signal and battery data are uploaded to a T-box through activating a network management function; if the memory 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 method is implemented to perform self-wake-up function control on a battery management system without changing a hardware design or increasing a system cost, and the method may be performed by the anomaly self-checking module 12 in the battery monitoring system according to the embodiment of the present invention, and may be implemented in a software and/or hardware form, and the battery monitoring method may include the following steps:

Step 210, obtaining battery threshold information set before the battery management system is powered down.

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

Step 220, monitoring the battery state information in real time after the battery management system is powered down.

Specifically, the abnormal self-checking module monitors battery state information in real time after the battery management system is powered down, wherein the battery state can include battery voltage, battery temperature and the like.

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

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

Further, on the basis of the 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 a battery temperature threshold, a battery high-voltage threshold and a battery low-voltage threshold, generating notification information 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 waking up the whole vehicle to perform fault processing and fault early warning.

In one exemplary embodiment, the battery monitoring system improves coverage of the battery self-wake safety monitoring upon identifying a battery abnormality. The method may comprise the steps of:

step 1: the battery management system sets a battery temperature too high fault threshold, a battery voltage too high fault threshold, and a battery voltage too low fault threshold before low power down 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.

Step 3: when the analog front end recognizes that the current temperature of any battery is higher than the set battery temperature too high fault threshold, or the current voltage of any battery is higher than the battery voltage too high fault threshold, or the current voltage of any battery is lower than the battery voltage too low fault threshold, the battery management system is awakened, an excitation signal 2 in the figure 3 is triggered, a network management function is activated, a battery fault processing signal is uploaded to the whole vehicle controller, 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 may execute the battery monitoring method according to any embodiment of the present invention, and the battery monitoring device includes functional modules and beneficial effects corresponding to the execution method, and 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 collection module 301 is configured to collect battery status information according to self-checking, where the battery status information at least includes one of a battery voltage and an insulation resistance value.

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

And the fault notification module 303 is used for notifying the main control module when the fault is determined according to the battery state information.

According to the embodiment of the invention, the self-checking acquisition module acquires the battery state information according to the self-checking time, the timing determination module adjusts the self-checking time according to the battery state information, and the fault notification module also notifies the main control module when determining a fault according to the battery state information. The embodiment of the invention dynamically adjusts the self-checking period of the timing self-checking module by using the state information, can improve the accuracy of battery state acquisition, improves the accuracy of battery state information acquisition and reduces the risk of battery safety missing report.

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

The threshold value acquisition module 401 is configured to acquire battery threshold value information set before the battery management system is powered down.

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

The fault notification module 403 is configured to determine a fault time notification master control module 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 this embodiment. The battery monitoring system includes: the system comprises a timing self-checking module, an abnormal self-checking module and a main control module; the timing self-checking module acquires battery state information according to self-checking time, and determines the next self-checking time 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 operation mode, and notifies the main control module when a fault is determined according to the battery state information; the main control module is used for receiving the notification of the timing self-checking module and the abnormal self-checking module and waking up the whole vehicle to perform fault processing.

Fig. 9 is a schematic structural diagram of a battery management system provided in an embodiment of the present invention, referring to fig. 9, the battery management system may include a timing self-wake-up function, an abnormal self-wake-up function, a battery system insulation monitoring function, a battery system security monitoring function, a network storage function and a data storage function, where the battery management system may be formed by a main chip, a clock chip and an analog front-end sampling chip together, the timing self-wake-up function may be implemented by the main chip and the clock chip together, the timing self-check module in the embodiment of the present invention may be formed by the clock chip and the main chip together, the abnormal self-wake-up function may be implemented by the analog front-end sampling chip and the main chip together, that is, the abnormal self-check module in the embodiment of the present invention may be formed by the analog front-end sampling chip and the main chip together.

Fig. 10 is a schematic structural diagram of a domain control system provided by the embodiment of the present invention, referring to fig. 10, the domain control system may be configured by software and hardware, and the hardware of the domain control system at least includes a main chip, a clock chip and a virtual front end sampling chip, where the clock chip may be provided with a timing self-wake-up control function, and the clock chip 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 outside the domain control system. The virtual front-end chip can realize an abnormal self-awakening function, can acquire a battery temperature signal, a battery voltage signal and an insulation resistance value, determines a battery fault by the main chip on one or more of the insulation resistance value, the battery voltage signal and the battery temperature signal, and sends an excitation signal 2 to the outside of the domain control system. Furthermore, the main chip can also transmit the acquired insulation resistance value, battery voltage and 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, and 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 processors 70 in the electronic device may be one or more, one processor 70 being taken as an example in fig. 11; the processor 70, the memory 71, the input means 72 and the output means 73 in the electronic device may be connected by a bus or other means, in fig. 11 by way of example.

The memory 71 is used as a computer readable storage medium 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-checking acquisition module 301, the timing determination module 302, and the fault notification module 303 or the threshold acquisition module 401, the implementation monitoring module 402, and the fault notification module 403 in the battery monitoring device). The processor 70 executes various functional applications of the electronic device and data processing, i.e., implements the battery monitoring method described above, by running software programs, instructions and modules stored in the memory 71.

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, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, 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, memory 71 may further include memory remotely located relative to processor 70, which may be connected to the electronic device via 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 entered numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. The output means 73 may comprise 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, are for performing a battery monitoring method, the method comprising:

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

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

and notifying a 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 power-down of a battery management system;

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

and informing a main control module when determining faults according to the battery state information and the battery threshold information.

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

From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.

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

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A battery monitoring system, the battery monitoring system comprising:

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

the timing self-checking module collects battery state information according to self-checking timing, determines the next self-checking timing of the timing self-checking module according to the battery state information, and comprises the following steps:

the timing self-checking module wakes up a battery management system according to the self-checking timing; the timing self-checking module controls the battery management system to collect 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 the historical voltage and a mean value of the minimum value of the historical voltage stored before the last power-down of the battery management system and a position of the minimum voltage as historical battery state information; the timing self-checking module compares the battery state information with the historical battery state information to determine the battery change degree; the timing self-checking module determines the next self-checking time of the timing self-checking module according to the battery change degree;

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 operation mode, and notifies the main control module when a fault is determined according to the battery state information;

the main control module is used for receiving the notification of the timing self-checking module and the abnormal self-checking module and waking up the whole vehicle to perform fault treatment;

the timing self-checking module determines the next self-checking time of the timing self-checking module according to the battery change degree, and comprises the following steps:

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 value as the difference value between the minimum historical voltage value and the average value of the minimum historical voltage value; if the minimum voltage position is different from the historical minimum voltage position, the timing self-checking module stores a difference value between the historical voltage minimum value and a historical voltage minimum value mean value as 0; when the difference between the voltage minimum and the voltage minimum average and the difference between the historical voltage minimum and the historical voltage minimum average is greater than or equal to a first threshold voltage, the timing self-checking module sets a voltage storage count to a maximum threshold value and sets the self-checking time to a first duration; when the difference between the voltage minimum and the voltage minimum average and the difference between the historical voltage minimum and the historical voltage minimum average is smaller than a first threshold voltage and larger than a second threshold voltage, the timing self-checking module increases the voltage storage count by 1, and sets the self-checking time to be a second 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 or equal to a second threshold voltage, the timing self-checking module clears a voltage storage count and sets the self-checking timing as a third duration; wherein the first duration, the second duration, and the third duration are sequentially increased.

2. The system of claim 1, wherein the timing self-test module further notifies the master module when a fault is determined from the battery status information, comprising:

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

generating notification information to the main control module when the storage count is greater than or equal to the fault threshold number;

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

3. The system of claim 1, wherein the timed self-test module collects battery status information from a self-test timing, and determines the next self-test time of the timed self-test module from the battery status information, comprising:

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

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

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

4. The system of claim 3, wherein the timing self-test module determining the next self-test time of the timing self-test module based on the magnitude relationship of the battery status information and a threshold parameter comprises:

the timing self-checking module acquires 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 determines a positive electrode size relation, a negative electrode size relation and a temperature difference size relation of the positive electrode ground insulation resistance, the negative electrode ground insulation resistance and the first temperature difference in the battery state information, which correspond to the first insulation resistance threshold, the second insulation resistance threshold and the temperature difference threshold in the threshold parameter respectively;

5. A system according to claim 1 or 3, wherein the timed self-test module further informs the master module when a fault is determined from the battery status information, comprising:

the timing self-checking module also acquires a stored historical positive electrode insulation resistance to ground, a historical negative electrode insulation resistance to ground, a historical first temperature difference and a resistance storage count;

the timing self-checking module determines positive electrode insulation resistance, negative electrode insulation resistance and first temperature difference in the battery state information, wherein the positive electrode difference value, the negative electrode difference value and the temperature difference value respectively correspond to the historical positive electrode insulation resistance, the historical negative electrode insulation resistance and the historical first temperature difference value;

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

when the negative electrode difference value is larger than zero, the timing self-checking module stores the negative electrode ground insulation resistance value as the historical negative electrode ground insulation resistance value, otherwise, the historical negative electrode ground insulation resistance value is set to zero;

When the positive electrode difference value and/or the negative electrode difference value is greater than or equal to an insulation change limit, the timing self-checking module sets the resistance value storage count as a count maximum value;

when the positive electrode difference value and/or the negative electrode difference value is 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 electrode difference value and/or the negative electrode difference value 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 storage count is greater than or equal to the count maximum value and the temperature difference value is greater than zero, notification information is generated to the main control module;

6. A system according to claim 1 or 3, further comprising:

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 relation as the next self-checking timing.

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

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

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

generating notification information to the main control module 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;

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

8. The system of claim 1, wherein the master control module is configured to receive the notifications of the timing self-test module and the anomaly self-test module, and wake up the whole vehicle for fault handling, and comprises:

the main control module is in a working state when receiving communication information of the timing self-checking module and the abnormal self-checking module;

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

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

10. A battery monitoring method applied to a timed self-test module, the method comprising:

determining the next self-test time according to the battery state information comprises the following steps: waking up a battery management system according to the self-checking timing; controlling the battery management system to collect a voltage minimum value of at least one single battery, determining a minimum voltage position and a voltage minimum value mean value, and taking 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; acquiring a difference value between a minimum value of a historical voltage and a mean value of the minimum value of the historical voltage stored before the last time the battery management system is powered down and a position of the minimum voltage as historical battery state information; comparing the battery state information with the historical battery state information to determine a battery change degree; determining the next self-checking time of the timing self-checking module according to the battery change degree;

Notifying a main control module when determining a fault according to the battery state information;

wherein determining the next self-test time of the timing self-test module according to the battery change degree comprises:

11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the battery monitoring method according to any one of claims 10.

12. A vehicle, characterized in that it comprises a battery monitoring system according to any one of claims 1-9.