Battery fault monitoring system, battery system and electric scooter

Abstract

The invention provides a battery fault monitoring system, a battery system and an electric scooter, which can store monitoring data in a preset time period before and after a fault occurrence moment of a battery, store data in the preset time period before the fault occurrence moment, and effectively analyze fault occurrence reasons based on the stored data. Therefore, subsequent analysis and improvement can be carried out on the battery based on the cause of the fault, the reliability and the service life of the battery can be improved, meanwhile, data within a preset time period after the fault occurrence moment is stored, and the self-recovery performance of the battery can be evaluated and researched based on the stored data. Besides, the fault monitoring system can store the required monitoring data in the front and back preset time periods, does not occupy too large storage space, and can read the data in the storage space when the main control chip is damaged.

Description

Technical Field

[0001] The present application relates to the technical field of battery fault monitoring, and in particular to a battery fault monitoring system, a battery system and an electric scooter. Background Art

[0002] Electric scooters usually have batteries inside to power the scooters. When a battery fails, it will cause damage to the battery, and in severe cases, it may cause the battery to explode, posing a safety risk to users of electric scooters. Therefore, it is very important to accurately monitor possible battery failures and store the data for subsequent analysis.

[0003] In the related art, the storage of data related to battery failure is not complete, and only the data before the failure occurs is saved, which leads to incomplete data storage, making it impossible to accurately and effectively analyze the performance of various aspects of the battery based on the stored data. Summary of the invention

[0004] In view of this, the purpose of the present application is to propose a battery fault monitoring system, a battery system and an electric scooter to solve or partially solve the problems raised by the background technology.

[0005] Based on the above purpose, the first aspect of the present application provides a battery fault monitoring system, including a data collector, a fault monitor, a data storage device and a first storage device;

[0006] The data collector is connected to the fault monitor and the data storage device, and is used to obtain monitoring data of the battery and send the monitoring data to the fault monitor and the data storage device;

[0007] The fault monitor comprises a fault monitoring chip, the fault monitoring chip comprises a data acquisition receiving interface and a fault output interface, the data acquisition receiving interface is connected to the data collector, the fault output interface is connected to the data storage device, the fault monitor is used to receive the monitoring data and judge whether the battery fails based on the monitoring data, and send a fault signal to the data storage device in response to determining that the battery fails;

[0008] The data storage device comprises a data storage chip, the data storage chip is connected to the fault output interface and the first memory, the data storage device extracts fault data based on the fault signal, and sends and stores the fault data to the first memory;

[0009] The fault data includes monitoring data within a preset period before and after the fault occurs.

[0010] A second aspect of the present application provides a battery system, comprising a battery and the battery fault monitoring system described in any one of the first aspects above.

[0011] A third aspect of the present application provides an electric scooter, comprising the battery system described in the second aspect.

[0012] From the above, it can be seen that the battery fault monitoring system, battery system and electric scooter provided by the present application, the battery fault monitoring system includes a data collector, a fault monitor and a first memory, the data collector collects the monitoring data of the battery in real time and sends it to the fault monitor, the fault monitor receives the monitoring data and judges whether the battery has a fault based on the monitoring data, when it is determined that the battery has a fault, sends a fault signal to the data memory, the data memory extracts the fault data based on the fault signal, and sends and stores the fault data to the first memory, the fault data includes the monitoring data within a preset time period before and after the fault occurs, so that the data within the preset time period before the fault occurs is stored, the cause of the fault can be effectively analyzed based on these stored data, and then the battery can be subsequently analyzed and improved based on the cause of the fault, which is beneficial to improve the reliability and service life of the battery, at the same time, the data within the preset time period after the fault occurs is stored, and the self-recovery performance of the battery can be evaluated and studied based on these stored data. In addition, a dedicated first memory is used to save monitoring data within a preset time period before and after the fault occurs. On the one hand, the required monitoring data can be saved separately in the first memory to prevent data loss due to battery failure or damage to the fault monitor, and the first memory can be read by other control chips to facilitate timely acquisition of fault data; on the other hand, only saving the monitoring data within the preset time period before and after the fault occurs will not take up too much storage space, which can reduce the space requirement for the first memory. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 An exemplary schematic diagram of an electric scooter according to an embodiment of the present application is shown;

[0015] Figure 2 A schematic diagram showing the circuit principle of a battery fault monitoring system according to an embodiment of the present application is shown;

[0016] Figure 3A schematic diagram showing a first use process of the battery fault monitoring system according to an embodiment of the present application is shown;

[0017] Figure 4 A schematic diagram showing the circuit principle of a data collector according to an embodiment of the present application is shown;

[0018] Figure 5 Shows Figure 4 A partial enlarged schematic diagram of B in the middle;

[0019] Figure 6 Shows Figure 4 A is a partial enlarged schematic diagram;

[0020] Figure 7 Shows Figure 4 A partial enlarged schematic diagram of D in the middle;

[0021] Figure 8 A circuit schematic diagram of a current acquisition circuit according to an embodiment of the present application is shown;

[0022] Fig. 9 for Figure 4 A partial enlarged schematic diagram of C in the middle;

[0023] Fig.10 A schematic diagram showing the circuit principle of a fault monitor according to an embodiment of the present application is shown;

[0024] Fig.11 Shows Fig.10 A partial enlarged schematic diagram of middle E;

[0025] Fig.12 A schematic diagram showing the circuit principle of the first temperature acquisition branch of an embodiment of the present application is shown;

[0026] Fig.13 A schematic diagram showing the circuit principle of the second temperature acquisition branch of an embodiment of the present application is shown;

[0027] Fig.14 A schematic diagram showing the circuit principle of the data storage device according to an embodiment of the present application is shown;

[0028] Fig.15 A second use process diagram of the battery monitoring system according to an embodiment of the present application is shown;

[0029] Fig.16 A third use flow diagram of the battery monitoring system according to an embodiment of the present application is shown.

[0030] In the figure: 1, electric scooter; 11, front frame; 111, handle; 112, handbrake assembly; 12, foot pedal; 13, front wheel; 14, rear wheel; 15, foot brake assembly;

[0031] 100, data collector; 101, data acquisition chip; 1011, data acquisition output interface; 102, voltage acquisition circuit; 1021, cell voltage acquisition branch; 1022, total voltage acquisition branch; 103, current acquisition circuit; 1031, sampling branch; 104, temperature acquisition circuit; 105, charging voltage detection circuit; 200, fault monitor; 201, fault monitoring chip; 2011, data acquisition receiving interface; 2012, fault output interface; 202, first temperature acquisition branch; 203, second temperature acquisition branch; 300, data storage device; 301, data storage chip; 302, storage branch; 303, output branch; 400, first storage device;

[0032] RF12, the twelfth RF resistor; RF11, the eleventh RF resistor; RF10, the tenth RF resistor; RF9, the ninth RF resistor; RF8, the eighth RF resistor; RF7, the seventh RF resistor; RF6, the sixth RF resistor; RF5, the fifth RF resistor; RF4, the fourth RF resistor; BC12, the twelfth voltage sensor; BC11, the eleventh voltage sensor; BC10, the tenth voltage sensor; BC9, the ninth voltage sensor; BC8, the eighth voltage sensor; BC7, the seventh voltage sensor; BC6, the sixth voltage sensor; BC5, the fifth voltage sensor; BC4, the fourth voltage sensor; CF12, the twelfth voltage-stabilizing capacitor; CF11, the eleventh voltage-stabilizing capacitor; CF10, the tenth voltage-stabilizing capacitor; CF9, the ninth voltage-stabilizing capacitor; CF8, the eighth voltage-stabilizing capacitor; CF7, the seventh voltage-stabilizing capacitor; CF6, the sixth voltage-stabilizing capacitor; RF5, the fifth voltage-stabilizing capacitor; C3, the third capacitor; R1, the thirty-third resistor; D1, the first diode; BAT+, the first connection Interface; RSE1, first current-sense resistor; RSE2, second current-sense resistor; C4, fourth capacitor; C5, fifth capacitor; R2, thirty-fourth resistor; R3, thirty-fifth resistor; R126, one hundred and twenty-sixth resistor; R127, one hundred and twenty-seventh resistor; NTC-EN1, first temperature sensor; R33, first resistor; R34, second resistor; RT6, first thermistor; RT2, second thermistor; NTC-1 first controller; NTC-EN2, second temperature sensor ; R35, the third resistor; R36, the fourth resistor; RT3, the third thermistor; NTC-2, the second controller; R90, the ninetieth resistor; R91, the ninety-first resistor; R94, the ninety-fourth resistor; R101, the one hundred and first resistor; R106, the one hundred and sixth resistor; R39, the thirty-ninth resistor; C65, the sixty-fifth voltage-stabilizing capacitor; C66, the sixty-sixth voltage-stabilizing capacitor; C68, the sixty-eighth voltage-stabilizing capacitor; the sixty-ninth voltage-stabilizing capacitor C69; C70, the seventieth voltage-stabilizing capacitor. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only configured to represent relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] As mentioned above, when a battery fails, such as overvoltage, undervoltage, overcurrent or overtemperature, it will damage the battery, and in severe cases, it may cause the battery to explode, posing a safety risk to users of electric scooters. Therefore, how to accurately monitor and record possible battery failures is an urgent problem to be solved.

[0036] In the related art, the battery voltage, current or temperature is monitored in real time through a dedicated monitoring system. Once the voltage, current or temperature value exceeds a preset threshold, the battery is determined to be faulty and a fault signal is sent to the platform or user connected to the monitoring system.

[0037] The monitoring system in the related technology is generally divided into two monitoring modes:

[0038] The first method is to monitor the voltage, current or temperature values ​​in real time and make judgments on them. However, the voltage, current and temperature values ​​are only used for judgment and will not be stored. The advantage of this method is that there is no need to set up a dedicated storage space. However, since the voltage, current and temperature values ​​are not stored, once a fault occurs, the user cannot obtain the voltage, current and temperature values ​​before the fault occurs, so that the cause of the fault cannot be effectively analyzed based on the data before the fault occurs, and the battery cannot be subsequently analyzed and improved based on the cause of the fault, which is not conducive to the long-term use of the battery.

[0039] The second method: real-time monitoring of voltage, current or temperature values ​​and judgment thereof, while storing all voltage, current and temperature values ​​before the fault occurs. The advantage of this method is that all data before the fault occurs can be saved for subsequent analysis. However, saving all voltage, current and temperature values ​​before the fault occurs requires a large amount of storage space, which is not conducive to the operation and maintenance of the monitoring system. Moreover, if the data is only saved in the storage space connected to the system, once the main control chip of the system is damaged, the data stored in the storage space will also be lost, resulting in the inability to perform fault analysis based on these stored data. In addition, this method can only save the data before the fault occurs, and does not examine the data after the fault occurs.

[0040] In fact, when a battery fails, both the data before and after the failure are very important. Based on the combination of the two, we can better study and evaluate the performance of various aspects of the battery.

[0041] Based on this, the present application provides a battery fault monitoring system, a battery system and an electric scooter, which can store the monitoring data within a preset time period before and after the moment when the battery fault occurs. By storing the data within the preset time period before the moment when the fault occurs, the cause of the fault can be effectively analyzed based on these saved data, and then the battery can also be subsequently analyzed and improved based on the cause of the fault, which is beneficial to improving the reliability and service life of the battery. At the same time, the data within the preset time period after the moment when the fault occurs is stored, and the self-recovery performance of the battery can be evaluated and studied based on these saved data. In addition, the fault monitoring system of the present application can save the required monitoring data within the preset time period before and after, without taking up too much storage space, and can also read the data in the storage space when the main control chip is damaged.

[0042] Figure 1 A schematic diagram of an exemplary electric scooter 1 according to an embodiment of the present application is shown.

[0043] like Figure 1 As shown, the electric scooter 1 may include a front frame 11, a footrest 12, a front wheel 13 and a rear wheel 14. The footrest 12 has a substantially flat surface for a user to stand on, the footrest 12 extends in the longitudinal direction, the front end of the footrest 12 is fixedly connected to the lower end of the front frame 11, and the rear end supports and connects the rear wheel 14. The front frame 11 stands upright on the footrest 12, the front wheel 13 is arranged at the bottom of the front frame 11, and a handle 111 is arranged on the top of the front frame 11 for the user to hold, and the front wheel 13 is driven to change direction by turning the handle 111, thereby controlling the driving direction of the electric scooter 1. The electric scooter 1 may also include a brake mechanism, which can cut off the driving source of the electric scooter 1 and brake when emergency braking is required, thereby quickly stopping the electric scooter 1.

[0044] In a specific riding scenario, the user stands on the foot pedal 12 and holds the handlebars 111 with both hands to control the forward direction and balance of the scooter 1. When braking in an emergency, the user will trigger the brake mechanism urgently. Due to the different operating methods of the brake mechanism, different operating times, operating comfort and braking experiences will result. For example, when the front wheel brakes, since the rear wheel still maintains the running speed before braking, it will bring a sense of diving at high speeds, and the operator's body will also lean forward, and most of the weight will act on the front frame through the handlebars.

[0045] In order to improve the flexibility of the braking operation and ensure the reliability of the braking mechanism, in some embodiments, the braking mechanism can be a hand brake assembly 112 or a foot brake assembly 15, or can include both the hand brake assembly 112 and the foot brake assembly 15.

[0046] The handbrake assembly 112 is arranged on the handle 111. The hand used to operate the handle 111 can also operate the handbrake assembly 112, which has high operating flexibility and quick response. The footbrake assembly 15 is arranged on the foot pedal 12, including a brake plate protruding from the upper surface of the foot pedal 12, which is used to trigger the footbrake assembly 15 to brake the electric scooter 1 by stepping on the brake plate.

[0047] The electric scooter 1 can be powered by direct current or by a battery. When the electric scooter 1 is powered by a battery, a battery system is provided in the electric scooter 1, and the battery system is accommodated in the footrest 12. The battery system includes a battery and a battery fault monitoring system. The battery is used to store electrical energy and to power the electric scooter 1. The battery fault monitoring system is used to monitor various parameters of the battery to monitor the safety and reliability of the battery in real time.

[0048] Figure 2 The schematic diagram of the circuit principle of the battery fault monitoring system is shown. Figure 3 A schematic diagram showing a first usage principle of a battery fault monitoring system is shown.

[0049] See also Figure 2 and Figure 3As shown, the battery fault monitoring system includes a data collector 100, a fault monitor 200, a data storage device 300 and a first storage device 400; the data collector 100 is connected to the fault monitor 200 and the data storage device 300, and is used to obtain monitoring data of the battery and send the monitoring data to the fault monitor 200 and the data storage device 300; the fault monitor 200 includes a fault monitoring chip 201, and the fault monitoring chip 201 includes a data acquisition receiving interface 2011 and a fault output interface 2012, the data acquisition receiving interface 2011 is connected to the data collector 100, and the fault output interface 2012 is connected to the data storage device 300, the fault monitoring chip 201 is used to receive monitoring data and judge whether the battery fails based on the monitoring data, and in response to determining that the battery fails, send a fault signal to the data storage device 300, the data storage device 300 extracts fault data based on the fault signal, and sends and stores the fault data to the first storage device 400; wherein the fault data includes monitoring data within a preset time period before and after the fault occurs.

[0050] Specifically, the data collector 100 includes a data acquisition chip 101, the data acquisition chip 101 includes multiple data acquisition output interfaces 1011, the fault monitoring chip 201 includes a data acquisition receiving interface 2011, and the data acquisition output interface 1011 is connected to at least one data acquisition receiving interface 2011. In this way, the data collector 100 can send the collected battery monitoring data to the fault monitor 200.

[0051] At the same time, the data collector 100 can also synchronously send the collected data to the data storage 300. The data storage 300 includes a data storage chip 301, which is connected to the fault output interface 2012 and at least one collected data output interface 1011. The data storage 300 is used to receive the monitoring data of the battery collected by the data collector 100, and is also used to receive the fault signal sent by the fault monitor 200.

[0052] The data storage device 300 is used to pre-store the collected monitoring data. The data storage device 300 includes a data storage chip 301, and the data storage chip 301 can periodically store the monitoring data. Exemplarily, the monitoring data can be stored in a ring buffer of the data storage chip 301, and the newly generated monitoring data overwrites the earliest stored monitoring data in the ring buffer.

[0053] Specifically, the ring buffer may also be called a ring buffer, a circular queue and a circular buffer, and is a data structure used to represent a fixed-size, head-to-tail connected buffer, suitable for caching data streams.

[0054] The monitoring data is stored in the ring buffer. The newly generated monitoring data can overwrite the earliest monitoring data saved in the ring buffer. That is, the ring buffer can dynamically overwrite the old data and retain the latest data. This ensures that when a fault occurs, the data stored in the ring buffer is the latest data before and after the fault occurs, providing accurate data support for subsequent fault analysis.

[0055] At the same time, since the ring buffer can store the latest data within a fixed time window, the old data is dynamically overwritten, thereby reducing the demand for storage space of the data storage device 300.

[0056] The data collector 100 sends the collected monitoring data to the fault monitor 200. After receiving the monitoring data, the fault monitor 200 determines whether the battery has a fault based on the monitoring data. Specifically, it can determine whether the monitoring data exceeds a fault threshold.

[0057] The fault threshold may be a threshold range of the monitoring data when the battery is in a normal state, or may be a lower limit value or an upper limit value of the monitoring data when the battery is in a normal state.

[0058] When the monitoring data does not exceed the fault threshold, it means that the monitoring data is in a normal state and the battery is not faulty. When the monitoring data exceeds the fault threshold, it means that the monitoring data is in an abnormal state and the battery is faulty.

[0059] Different monitoring data may correspond to different fault thresholds. For example, the fault threshold corresponding to the current value is the current threshold, the fault threshold corresponding to the voltage value is the voltage threshold, and the fault threshold corresponding to the temperature value is the temperature threshold.

[0060] When the fault monitoring chip 201 determines that the battery has a fault (exemplarily, when the monitoring data exceeds the fault threshold), a fault signal is sent to the data storage 300, and the data storage 300 extracts fault data based on the fault signal, and sends and stores the fault data to the first memory 400. The fault data includes monitoring data within a preset period before and after the fault occurs.

[0061] By storing the data within a preset time period before the fault occurs, the cause of the fault can be effectively analyzed based on the saved data, and then the battery can be subsequently analyzed and improved based on the cause of the fault, which is beneficial to improving the reliability and service life of the battery. At the same time, by storing the data within a preset time period after the fault occurs, the self-recovery performance of the battery can be evaluated and studied based on the saved data.

[0062] The preset time period is a time period preset based on actual experience. For example, the preset time period may be 5 minutes, 10 minutes, or 20 minutes.

[0063] When at least one of the monitoring data exceeds the corresponding fault threshold, it is determined that the monitoring data exceeds the fault threshold, and the fault monitoring chip 201 determines that the battery has failed, and sends a fault signal to the data storage 300. The data storage 300 extracts the monitoring data within a preset period before and after the fault occurs, determines it as fault data, and then sends and stores the fault data to the first memory 400.

[0064] In this way, the fault data can be completely saved in the first memory 400. Even if the data acquisition chip 101 and the fault monitoring chip 201 (i.e., the main control chip) are damaged due to abnormal conditions, as long as the chip of the first memory 400 is still normal, other control chips can be used to read the fault data stored in the first memory 400, and then the battery and the entire fault monitoring system can be subsequently analyzed and optimized based on the fault data, and the situation where all fault data are lost due to damage to the main control chip will not occur.

[0065] In some embodiments, the monitoring data includes at least one sub-data, each of which corresponds to a fault threshold. In response to the monitoring data exceeding the fault threshold, determining that the battery has failed includes:

[0066] In response to at least one of the sub-data exceeding the corresponding fault threshold, it is determined that the battery fails, the sub-data is determined as fault item data, and the other sub-data in the monitoring data except the sub-data is determined as non-fault item data;

[0067] The fault data includes fault item data within a preset time period before and after the fault occurs, or fault item data and part of non-fault item data within a preset time period before and after the fault occurs, or fault item data and all non-fault item data within a preset time period before and after the fault occurs; wherein, the part of non-fault item data is sub-data related to the fault item data in the preset monitoring data.

[0068] Specifically, the sub-data is battery voltage and / or battery current and / or battery temperature and / or battery cell temperature and / or transistor temperature. The battery temperature is the overall temperature of the battery, and the battery cell temperature is the battery cell temperature of a specific battery cell (for example, the middle battery cell) in the battery.

[0069] In a specific implementation, taking the sub-data as battery voltage, battery current, battery temperature, battery cell temperature and transistor temperature as an example, when the battery voltage in the monitoring data exceeds the corresponding fault threshold, it is determined that the battery has failed. At this time, when extracting the fault data, there may be three different situations:

[0070] Case 1: The fault item data, i.e., the battery voltage, within a preset period before and after the fault occurs is determined as the fault data. In this case, the fault data finally saved only includes the fault item data, which facilitates the subsequent analysis of the cause of the fault based on the battery voltage.

[0071] Case 2: The fault item data, namely the battery voltage and some non-fault item data (such as battery current) within a preset period before and after the fault occurs are determined as fault data. In this case, the fault data finally saved includes not only the fault item data battery voltage, but also the battery current that is closely related to the fault item data battery voltage. In this way, when performing subsequent data analysis, not only can the cause of the fault be analyzed based on the battery voltage, but also the current value that is correlated with the voltage value can be analyzed to improve the accuracy of the data.

[0072] Case three: The fault item data, i.e., the battery voltage, and all non-fault item data, i.e., the battery current, battery temperature, battery cell temperature, and transistor temperature, within a preset period before and after the fault occurs are determined as fault data. At this time, the fault data finally saved includes not only the fault item data, but also all other sub-data in the monitoring data, ensuring the comprehensiveness and completeness of the data finally saved, so as to facilitate the subsequent analysis, induction and conclusion of the sub-data before and after the battery fault occurs, so as to accurately analyze the cause of the battery failure.

[0073] In the present application, different fault data can be extracted and stored based on different actual needs to ensure that the fault data finally saved can meet the actual needs while not taking up too much storage space.

[0074] Since the correlations between different sub-data are different, based on different fault item data, the part of non-fault item data that needs to be saved in the fault data is also different.

[0075] In some embodiments, in response to the battery voltage being the fault item data, the portion of the non-fault item data is the battery current; and / or in response to the battery current being the fault item data, the portion of the non-fault item data is the battery voltage; and / or in response to the battery temperature being the fault item data, the portion of the non-fault item data is the battery current and / or the battery voltage; and / or in response to the battery cell temperature being the fault item data, the portion of the non-fault item data is the battery temperature and / or the battery current and / or the battery voltage.

[0076] Specifically, when the battery current is the fault item data, since the battery current and the battery voltage are highly correlated, some of the non-fault item data related to the battery current may be the battery voltage. In this way, when the battery current that exceeds the fault threshold and the battery voltage that does not exceed the fault threshold are saved together as fault data, it is convenient to combine the battery current and the battery voltage for subsequent analysis to improve the accuracy of the analysis.

[0077] When the battery voltage is the fault item data, since the battery current and the battery voltage are highly correlated, some of the non-fault item data related to the battery voltage may be the battery current. In this way, when the battery voltage exceeding the fault threshold and the battery current not exceeding the fault threshold are saved together as fault data, it is convenient to combine the battery current and the battery voltage for subsequent analysis to improve the accuracy of the analysis.

[0078] When the battery temperature is the fault item data, since the factors causing the battery temperature to be too high may be the temperature of the battery itself, or may be a local excessive voltage or a local excessive current, some of the non-fault data related to the battery temperature may be the battery current and the battery voltage. In this way, the battery temperature that exceeds the fault threshold and the battery voltage and battery current that do not exceed the fault threshold are saved together as fault data. In subsequent data analysis, it can be determined based on the battery temperature, battery voltage and battery current whether the battery temperature exceeds the fault threshold due to the battery temperature itself being too high, or the battery temperature exceeds the fault threshold due to the local current being too high or the local voltage being too high, thereby improving the accuracy of data analysis.

[0079] Similar to the battery temperature, when the cell temperature is the fault item data, the part of the non-fault item data may also be the battery temperature and / or the battery current and / or the battery voltage, so as to accurately analyze the cause of the fault based on the combination of the cell temperature, the battery temperature, the battery current and the battery voltage.

[0080] In the present application, based on different fault item data, different parts of non-fault item data that need to be saved can be determined, which can not only improve the accuracy of subsequent data analysis, but also avoid taking up too much storage space.

[0081] Figure 4 1 shows a schematic diagram of the circuit principle of the data collector 100. Figure 5 Shows Figure 4 A partial enlarged schematic diagram of B in the middle. Figure 6 Shows Figure 4 A partial enlarged schematic diagram, Figure 7 Shows Figure 4 A partial enlarged schematic diagram of D in the middle.

[0082] In some embodiments, see Figure 2, Figure 4 , Figure 5 and Figure 6 As shown, the sub-data include battery voltage and / or battery current and / or battery temperature. The data collector 100 includes a data acquisition chip 101, and a voltage acquisition circuit 102 and / or a current acquisition circuit 103 and / or a temperature acquisition circuit 104 connected to the data acquisition chip 101. The voltage acquisition circuit 102 is used to acquire the battery voltage, the current acquisition circuit 103 is used to acquire the battery current, and the temperature acquisition circuit 104 is used to acquire the battery temperature.

[0083] Specifically, the battery voltage is collected through the voltage collection circuit 102, the battery current is collected through the current collection circuit 103, and the battery temperature is collected through the temperature collection circuit 104. In this way, the data collector 100 can collect the battery voltage, current and temperature in real time, and send the collected voltage, current and temperature to the fault monitor 200 to monitor the battery status in real time.

[0084] Among them, the battery temperature refers to the temperature of the entire battery. Usually, a temperature sensor is attached to a position that can characterize the overall temperature of the battery (such as the top surface of the battery) to monitor the overall temperature of the battery.

[0085] In some embodiments, see Figure 5 and Figure 6 As shown, the battery voltage includes a cell voltage and a total battery voltage. The battery includes multiple cells. The voltage acquisition circuit 102 includes multiple cell voltage acquisition branches 1021 and a total voltage acquisition branch 1022. Each cell voltage acquisition branch 1021 and the total voltage acquisition branch 1022 are connected to the data acquisition chip 101. Each cell voltage acquisition branch 1021 is used to acquire the cell voltage of a cell, and the total voltage acquisition branch 1022 is used to acquire the total battery voltage.

[0086] Specifically, each cell voltage collection branch 1021 is used to collect the cell voltage of a cell. In this way, the cell voltages of multiple cells in the battery are collected simultaneously through multiple cell voltage collection branches 1021, ensuring that the cell voltages of multiple cells in the battery can be collected and monitored in real time.

[0087] Each battery cell voltage collection branch 1021 includes a radio frequency resistor and a voltage sensor, and the voltage sensor is used to connect to the corresponding battery cell. A first capacitor is connected between two adjacent battery cell voltage collection branches 1021.

[0088] For example, see Figure 6 and Figure 7As shown, the voltage acquisition circuit 102 includes thirteen battery cell voltage acquisition branches 1021, and each battery cell voltage acquisition branch 1021 includes a radio frequency resistor and a voltage sensor. The radio frequency resistor can be Figure 6 The twelfth RF resistor RF12, the eleventh RF resistor RF11, the tenth RF resistor RF10, the ninth RF resistor RF9, the eighth RF resistor RF8, the seventh RF resistor RF7, the sixth RF resistor RF6, the fifth RF resistor RF5, and the fourth RF resistor RF4 may also be Figure 7 The third RF resistor RF3, the second RF resistor RF2, the first RF resistor RF1, and the zeroth RF resistor RF0.

[0089] The voltage sensor can be Figure 6 The twelfth voltage sensor BC12, the eleventh voltage sensor BC11, the tenth voltage sensor BC10, the ninth voltage sensor BC9, the eighth voltage sensor BC8, the seventh voltage sensor BC7, the sixth voltage sensor BC6, the fifth voltage sensor BC5, and the fourth voltage sensor BC4 may also be Figure 7 The third voltage sensor BC3, the second voltage sensor BC2, the first voltage sensor BC1, and the zero voltage sensor BC0 are used to connect with the corresponding battery cells to monitor the battery cell voltage in real time.

[0090] In order to maintain the voltage stability between the multiple cell voltage collection branches 1021, a first capacitor is connected between two adjacent cell voltage collection branches 1021, and the multiple first capacitors are connected in series. The first capacitor can be Figure 6 The twelfth voltage-stabilizing capacitor CF12, the eleventh voltage-stabilizing capacitor CF11, the tenth voltage-stabilizing capacitor CF10, the ninth voltage-stabilizing capacitor CF9, the eighth voltage-stabilizing capacitor CF8, the seventh voltage-stabilizing capacitor CF7, the sixth voltage-stabilizing capacitor CF6, and the fifth voltage-stabilizing capacitor RF5 may also be Figure 7 The fourth voltage-stabilizing capacitor CF4, the third voltage-stabilizing capacitor CF3, the second voltage-stabilizing capacitor CF2, the first voltage-stabilizing capacitor CF1, and the zeroth voltage-stabilizing capacitor RF0.

[0091] The total voltage acquisition branch 1022 is used to acquire the total voltage of the battery, such as Figure 5 As shown, the total voltage collection branch 1022 includes a third capacitor C3, a thirty-third resistor R1, a first diode D1 and a first connection interface BAT+. The first connection interface BAT+ is used to connect to a battery to collect the total voltage of the battery.

[0092] In the present application, the total voltage of the battery is collected through the total voltage collection branch 1022, and the cell voltages of multiple cells of the battery are collected separately through the multiple cell voltage collection branches 1021. In this way, based on the total battery voltage and the cell voltage of each cell, it is possible to accurately monitor whether each battery and each cell voltage is normal, thereby improving the monitoring accuracy of the entire monitoring system and further improving the accuracy of its fault monitoring.

[0093] Figure 8 FIG. 1 shows a circuit schematic diagram of the current acquisition circuit 103 .

[0094] In some embodiments, see Figure 7 and Figure 8 As shown, the current acquisition circuit 103 includes two sampling branches 1031 arranged in parallel, one end of each sampling branch 1031 is connected to the data acquisition chip 101, and the other end of each sampling branch 1031 is used to connect to the battery, and a first current sensing resistor RSE1 and a second current sensing resistor RSE2 are arranged in parallel between the two sampling branches 1031.

[0095] Specifically, Figure 8 Two sampling branches 1031 are shown in FIG. Figure 8 The directions shown are subject to Figure 8 One end of the sampling branch 1031 on the left (i.e. Figure 7 and Figure 8 The other end is used to connect to the battery (i.e. Figure 8 One end of the sampling branch 1031 on the right (i.e. Figure 7 and Figure 8 The other end is used to connect to the battery (i.e. Figure 8 ) connection as shown in P-.

[0096] A first current sensing resistor RSE1 and a second current sensing resistor RSE2 are connected in parallel between the two sampling branches 1031 to sample the current flowing therethrough. Then, the battery current is accurately tested by testing the voltage difference between the SRP terminal and the SRN terminal of the sampling branch 1031.

[0097] A fourth capacitor C4 and a fifth capacitor C5 are also connected in parallel between the two sampling branches 1031 to keep the voltages of the two sampling branches 1031 relatively stable.

[0098] Each sampling branch 1031 includes two sampling resistors connected in parallel, one end of each sampling resistor is connected to the data acquisition chip 101, the other end of each sampling resistor is connected to the first current sensing resistor and the second current sensing resistor, and the other end of each sampling resistor is also used to connect to the battery. The sampling resistor can be Figure 8 The thirty-fourth resistor R2, the thirty-fifth resistor R3, the one-hundred-and-twenty-sixth resistor R126 and the one-hundred-and-twenty-seventh resistor R127 are shown.

[0099] by Figure 8 The directions shown are subject to Figure 8 The sampling branch 1031 on the left side includes a 34th resistor R2 and a 127th resistor R127 connected in parallel. Figure 8 The sampling branch 1031 on the right side includes a thirty-fifth resistor R3 and a one-hundred-twentieth current resistor R126 which are connected in parallel.

[0100] Further, Figure 8 TP77, TP78, TP79, and TP80 represent different sampling sites.

[0101] In the present application, when collecting the battery current, it is not enough to detect it only through the current sensing resistor, but on the basis of the current sensing resistor, the battery current is further accurately tested through the voltage difference between the two sampling branches 1031, thereby improving the accuracy of current collection.

[0102] Fig. 9 for Figure 4 A partial enlarged schematic diagram of C in the middle.

[0103] See also Fig. 9 As shown, the 26th and 27th pins of the data acquisition chip 101 are the acquisition data output interface 1011, which is used to connect to the acquisition data receiving interface 2011 of the fault monitoring chip 201, so as to realize the communication between the data acquisition chip 101 and the fault monitoring chip 201.

[0104] The 33rd pin of the data acquisition chip 101 is connected to the switch control circuit, which includes a switch signal receiving terminal (i.e. Fig. 9 As shown in RST-SHUT in FIG. 1 ), the switch signal receiving end is connected to the fault monitoring chip 201. In this way, the data acquisition chip 101 can be turned on or off by the fault monitoring chip 201.

[0105] In some embodiments, see Figure 7 As shown, the temperature acquisition circuit 104 includes a fourth thermistor TS1, and the fourth thermistor TS1 is used to monitor the battery temperature in real time.

[0106] Fig.10FIG. 2 shows a schematic diagram of a circuit principle of a fault monitor 200. Fig.11 Shows Fig.10 The partial enlarged schematic diagram of E in the middle, Fig.12 A schematic diagram of the circuit principle of the first temperature acquisition branch 202 is shown.

[0107] In some embodiments, see Fig.10 , Fig.11 and Fig.12 As shown, the sub-data includes the battery cell temperature, and the data collector 100 also includes a first temperature collection branch 202, the first temperature collection branch 202 is connected to the data collection chip 101 and the target battery cell of the battery, and the first temperature collection branch 202 is used to collect the battery cell temperature of the target battery cell.

[0108] Specifically, the first temperature acquisition branch 201 is connected to the data acquisition chip 101 through the fault monitor 200 , so that the battery cell temperature acquired by the first temperature acquisition branch 201 is sent to the data collector 100 through the fault monitor 200 .

[0109] The battery includes multiple cells. Generally speaking, the temperature of each cell is relatively uniform, so it is only necessary to measure the temperature of the entire battery. However, in special cases, some specific cells (such as the middle cell) among the multiple cells of the battery are more likely to have abnormal temperatures due to poor heat dissipation performance. Therefore, in this application, a first temperature acquisition branch 202 is specially set to collect the temperature of a specific cell (i.e., the target cell) to more accurately collect and monitor the cell temperature of the target cell, thereby improving the accuracy of the monitoring system in fault monitoring.

[0110] The first temperature acquisition branch 202 acquires the temperature of a specific battery cell, and then sends the acquired battery cell temperature to the fault monitoring chip 201. The fault monitoring chip 201 receives the battery cell temperature and determines whether the battery cell temperature exceeds the temperature threshold. In response to determining that the battery cell temperature exceeds the temperature threshold, it sends a fault signal to the data storage 300. The data storage 300 extracts fault data based on the fault signal, and sends and stores the fault data to the first memory 400. At this time, the fault data may only include the battery cell temperature within a preset period before and after the fault occurs, and may also include the battery cell temperature, battery temperature and / or battery current and / or battery voltage within a preset period before and after the fault occurs. In this way, the required fault data can be saved based on actual needs, which is convenient for subsequent fault analysis and battery optimization based on the fault data.

[0111] In the present application, the battery temperature is monitored by the temperature acquisition circuit 104, and the specific battery cell temperature is also monitored by the first temperature acquisition branch 202, which can improve the accuracy of temperature monitoring and further improve the accuracy of fault monitoring by the monitoring system.

[0112] In some embodiments, see Fig.11 and Fig.12 As shown, the first temperature acquisition branch 202 includes a first temperature sensor NTC-EN1, a first resistor R33, a second resistor R34, a first thermistor RT6, a second thermistor RT2 and a first controller NTC-1, one end of the first temperature sensor NTC-EN1 is connected to the fault monitoring chip 201 of the fault monitor 200, the other end of the first temperature sensor NTC-EN1 is connected to one end of the first resistor R33, one end of the first controller NTC-1 is connected to the fault monitoring chip 201 of the fault monitor 200, the other end of the first controller NTC-1 is connected to one end of the second resistor R34, the other end of the second resistor R34 and the other end of the first resistor R33 are both connected to one end of the second thermistor RT2, the other end of the second thermistor RT2 is grounded, the second thermistor RT2 is connected in parallel with the first thermistor RT6, and the second thermistor RT2 is used to connect to the target battery cell.

[0113] During specific implementation, the second thermistor RT2 is connected to the battery cell. For example, the second thermistor RT2 and the battery cell may be connected together through a metal patch. Fig.12 The position shown in the dotted box is the reserved area of ​​the metal patch.

[0114] One end of the first controller NTC-1 is connected to the fault monitoring chip 201 for receiving control instructions sent by the fault monitoring chip 201, and one end of the first temperature sensor NTC-EN1 is connected to the fault monitoring chip 201 for sending the battery cell temperature monitored by the first temperature acquisition branch 202 to the fault monitoring chip 201.

[0115] In the present application, the first temperature collection branch 202 is controlled by the fault monitoring chip 201, a specific battery cell temperature is collected by the first temperature collection branch 202, and the collected battery cell temperature is returned to the fault monitoring chip 201. In this way, it is possible to control when to start collecting the battery cell temperature and to make subsequent judgments based on the collected battery cell temperature. The entire temperature collection process is flexible and controllable, which is convenient for practical application.

[0116] Fig.13 A schematic diagram of the circuit principle of the second temperature acquisition branch 203 is shown.

[0117] See also Fig.11 and Fig.13As shown, the sub-data includes transistor temperature, the battery fault monitoring system also includes a transistor (not shown in the figure), the transistor is used to connect to the battery management system, the data collector 100 also includes a second temperature acquisition branch 203, the second temperature acquisition branch 203 is connected to both the transistor and the data acquisition chip 101, and the second temperature acquisition branch 203 is used to collect transistor temperature.

[0118] Specifically, the second temperature acquisition branch 203 is connected to the data acquisition chip 101 through the fault monitor 200 , and the transistor temperature acquired by the second temperature acquisition branch 203 is sent to the data acquisition chip 100 through the fault monitor 200 .

[0119] The transistor is located between the fault monitor 200 and the battery management system, and the fault monitor 200 sends monitoring data to the battery management system through the transistor. Therefore, in specific implementation, it is necessary to monitor not only the battery temperature but also the temperature of the transistor. If the temperature of the transistor is abnormal, the monitoring data cannot be sent to the battery management system.

[0120] Based on this, in the present application, the transistor temperature is collected through the second temperature collection branch 203, and the collected transistor temperature is sent to the fault monitoring chip 201. The fault monitoring chip 201 receives the transistor temperature and determines whether the transistor temperature exceeds the transistor temperature threshold. In response to determining that the transistor temperature exceeds the transistor temperature threshold, a fault signal is sent to the data storage 300. The data storage 300 extracts fault data based on the fault signal, and sends and stores the fault data to the first memory 400. At this time, the fault data may only include the transistor temperature within a preset period before and after the fault occurs, and may also include the transistor temperature, cell temperature and / or battery temperature and / or battery current and / or battery voltage within a preset period before and after the fault occurs. In this way, the required fault data can be saved based on actual needs.

[0121] In some embodiments, see Fig.11 and Fig.13As shown, the second temperature acquisition branch 203 includes a second temperature sensor NTC-EN2, a third resistor R35, a fourth resistor R36, a third thermistor RT3 and a second controller NTC-2, one end of the second temperature sensor NTC-EN2 is connected to the fault monitoring chip 201 of the fault monitor 200, the other end of the second temperature sensor NTC-EN2 is connected to one end of the third resistor R35, one end of the second controller NTC-2 is connected to the fault monitoring chip 201 of the fault monitor 200, the other end of the second controller NTC-2 is connected to one end of the fourth resistor R36, the other end of the fourth resistor R36 and the other end of the third resistor R35 are both connected to one end of the third thermistor RT3, the other end of the third thermistor RT3 is grounded, and the third thermistor RT3 is connected to the transistor.

[0122] During specific implementation, one end of the second controller NTC-2 is connected to the fault monitoring chip 201 for receiving control instructions sent by the fault monitoring chip 201, and one end of the second temperature sensor NTC-EN2 is connected to the fault monitoring chip 201 for sending the transistor temperature monitored by the second temperature acquisition branch 203 to the fault monitoring chip 201.

[0123] In the present application, the second temperature acquisition branch 203 is controlled by the fault monitoring chip 201, the transistor temperature is acquired by the second temperature acquisition branch 203, and the acquired transistor temperature is returned to the fault monitoring chip 201. In this way, it is possible to control when to start acquiring the transistor temperature and to make subsequent judgments based on the acquired transistor temperature. The entire temperature acquisition process is flexible and controllable, which is convenient for practical application.

[0124] Fig.14 A schematic diagram of the circuit principle of the data storage device 300 is shown.

[0125] See also Fig.14 As shown, the data storage device 300 also includes multiple storage branches 302 and output branches 303, at least one storage branch 302 is connected to the fault output interface 2012 of the fault monitor 200, at least one storage branch 302 is connected to the collected data output interface 1011 of the data collector 100, and the output branch 303 is connected to the first memory 400.

[0126] Specifically, one end of each storage branch 302 is connected to the data storage chip 301 , and the other end is connected to the fault output interface 2012 , the collected data output interface 1011 or the first memory 400 .

[0127] Different storage branches 302 can be used to store different monitoring data. For example, one storage branch 302 can be used to store voltage data, another storage branch 302 can be used to store current data, and still another storage branch 302 can be used to store transistor temperature data.

[0128] One end of at least one storage branch 302 is connected to the fault output interface 2012 of the fault monitoring chip 201. Fig.14 The SP1-CS terminal, SP1-C0 terminal, and SP1-WP terminal are all used to connect to the fault output interface 2012, so that the fault monitoring chip 201 can send specific fault data or fault signals to the data storage chip 301.

[0129] One end of at least one storage branch 302 is connected to the data collection output interface 1011 of the data collector 100. For example, Fig.14 The AK terminal in the data acquisition device 100 is connected to the data acquisition output interface 1011 of the data acquisition device 100, so that the data acquisition device 100 can send the collected monitoring data to the data storage device.

[0130] Each storage branch 302 includes a storage resistor. For example, the storage resistor may be Fig.14 The ninetieth resistor R90, the ninety-first resistor R91, the ninety-fourth resistor R94, the one hundred and first resistor R101 and the thirty-ninth resistor R39 are shown.

[0131] A second capacitor is connected between two adjacent storage branches 302. For example, the second capacitor may be Fig.14 The sixty-fifth voltage-stabilizing capacitor C65, the sixty-sixth voltage-stabilizing capacitor C66, the sixty-eighth voltage-stabilizing capacitor C68 and the seventieth voltage-stabilizing capacitor C70 are shown.

[0132] One end of the output branch 303 is connected to the data storage chip 301, and the other end is connected to the first memory 400. Exemplarily, Fig.14 The BK terminal in the first memory 400 is connected to the first memory 400 and is used to send the extracted fault data, the second fault data or the third fault data to the first memory 400 .

[0133] The output branch 303 includes a one-hundred-sixth resistor R106 and a sixty-ninth voltage-stabilizing capacitor C69.

[0134] In the present application, the data storage device 300 includes multiple storage branches 302, each storage branch 302 can be used to store different monitoring data, so that different monitoring data can be stored through different branches respectively, which not only improves the data storage efficiency, but also can classify and store different monitoring data, which is convenient for subsequent reading and exporting of data.

[0135] Fig.15 A second flow chart of the battery monitoring system according to an embodiment of the present application is shown. Fig.16 A third flow chart of the battery monitoring system according to an embodiment of the present application is shown.

[0136] In some embodiments, see Fig.15 and Fig.16 As shown, the battery fault monitoring system includes:

[0137] 1. Data pre-collection module (i.e. the aforementioned data collector 100)

[0138] Functional description: The data pre-acquisition module is responsible for continuously monitoring and recording key operating parameters such as real-time time, voltage, current, temperature, current version, etc. during normal system operation.

[0139] 2. Fault detection module (i.e. the aforementioned fault monitor 200)

[0140] Functional description: The fault detection module is responsible for real-time monitoring of the system's operating status and identifying any abnormal conditions or potential faults. This module analyzes the data collected by the data pre-collection module by setting multiple thresholds and rules to detect possible fault signals in a timely manner. When a fault is determined, the fault signal is triggered immediately.

[0141] 3. Data storage module (i.e. the aforementioned data storage 300)

[0142] Function description: This module uses the ring buffer technology to achieve real-time caching of historical data, that is, saving the latest data samples within a fixed time window.

[0143] Working principle: The ring buffer can dynamically overwrite old data and retain the latest operating data, so that when a fault occurs, the system can trace back to the detailed operating records of the period before the fault, providing sufficient context information for fault analysis. When the system is working normally, the data storage module exports data through the serial port regularly or when the user needs it, which is convenient for system maintenance personnel to analyze and diagnose.

[0144] After receiving the fault signal, the data in the ring buffer (i.e., the key data before and after the fault occurs) is locked and sent to the first memory to ensure that the fault-related data is completely saved. At the same time, the module can also adopt different recording strategies according to different fault types.

[0145] 4. First Memory

[0146] The first storage device is responsible for persisting fault data, ensuring that the data can be safely stored in both normal and faulty system states, thereby ensuring the reliability and integrity of the data.

[0147] Working principle: If the fault monitoring module is damaged but the storage chip of the first memory is still able to work, the storage chip can read and export the fault data under the control of other controllers (such as microcontroller unit, Microcontroller Unit, MCU), ensuring the integrity and availability of the data and avoiding data loss caused by system damage.

[0148] The monitoring system of the present application can record various abnormalities of the battery in detail and is extremely space-saving, which can help users quickly locate the cause of the fault, thereby improving the reliability and service life of the battery. In addition, the storage space requirement is small, and sufficient recording functions can be achieved using a low-end single-chip microcomputer and storage chip.

[0149] This application achieves comprehensive recording and real-time monitoring of fault data through data collection and intelligent storage. When a fault occurs, the key data before the fault can be saved. Even if the system is damaged, the data can still be read through the MCU to ensure data integrity and security. The system improves the accuracy of fault diagnosis, reduces maintenance time and cost, and significantly improves the reliability and maintenance efficiency of the battery system.

[0150] For the convenience of description, the above system is described by dividing the functions into various devices and describing them separately. Of course, when implementing this application, the functions of each device can be implemented in the same or multiple software and / or hardware.

[0151] It should be noted that some embodiments of the present application are described above. In some cases, the actions or steps recorded in the above embodiments can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0152] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the above embodiments of the present application, which are not provided in detail for the sake of simplicity.

[0153] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power / ground connections to the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device may be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). Where specific details (e.g., circuits) are set forth to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or with changes in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0154] Although the present application has been described in conjunction with specific embodiments of the present application, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the discussed embodiments.

[0155] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A battery fault monitoring system, characterized in that: It includes a data collector, a fault monitor, a data storage device and a first storage device; The data collector is connected to the fault monitor and the data storage device, and is used to obtain monitoring data of the battery and send the monitoring data to the fault monitor and the data storage device; The fault monitor comprises a fault monitoring chip, the fault monitoring chip comprises a data acquisition receiving interface and a fault output interface, the data acquisition receiving interface is connected to the data collector, the fault output interface is connected to the data storage device, the fault monitor is used to receive the monitoring data and judge whether the battery fails based on the monitoring data, and send a fault signal to the data storage device in response to determining that the battery fails; The data storage device comprises a data storage chip, the data storage chip is connected to the fault output interface and the first memory, the data storage device extracts fault data based on the fault signal, and sends and stores the fault data to the first memory; The fault data includes monitoring data within a preset period before and after the fault occurs.

2. The system according to claim 1, characterized in that The fault monitor is further used to determine whether the monitoring data exceeds a fault threshold, and in response to the monitoring data exceeding the fault threshold, determine that the battery fails.

3. The system according to claim 2, characterized in that The monitoring data includes at least one sub-data, each of the sub-data corresponds to a fault threshold; In response to the monitoring data exceeding the fault threshold, determining that the battery fails, comprises: In response to at least one of the sub-data exceeding the corresponding fault threshold, it is determined that the battery fails, the sub-data is determined as fault item data, and the other sub-data in the monitoring data except the sub-data is determined as non-fault item data; The fault data includes fault item data within a preset period before and after the fault occurs, or fault item data and part of non-fault item data within a preset period before and after the fault occurs, or fault item data and all non-fault item data within a preset period before and after the fault occurs.

4. The system according to claim 3, characterized in that The sub-data are battery voltage and / or battery current and / or battery temperature and / or battery cell temperature and / or transistor temperature; In response to the battery voltage being the fault item data, the portion of the non-fault item data is the battery current; and / or In response to the battery current being the fault item data, the portion of the non-fault item data is the battery voltage; and / or In response to the battery temperature being the fault item data, the portion of the non-fault item data is the battery current and / or the battery voltage; and / or In response to the battery cell temperature being the fault item data, the portion of non-fault item data is the battery temperature and / or the battery current and / or the battery voltage.

5. The system according to claim 4, characterized in that The sub-data include battery voltage and / or battery current and / or battery temperature. The data collector includes a data acquisition chip, and a voltage acquisition circuit and / or a current acquisition circuit and / or a temperature acquisition circuit connected to the data acquisition chip. The voltage acquisition circuit is used to acquire the battery voltage, the current acquisition circuit is used to acquire the battery current, and the temperature acquisition circuit is used to acquire the battery temperature.

6. The system according to claim 5, characterized in that The battery voltage includes a cell voltage and a total battery voltage; the battery includes multiple cells, and the voltage acquisition circuit includes multiple cell voltage acquisition branches and a total voltage acquisition branch, each of the cell voltage acquisition branch and the total voltage acquisition branch are connected to the data acquisition chip, each of the cell voltage acquisition branch is used to collect the cell voltage of one of the cells, and the total voltage acquisition branch is used to collect the total battery voltage.

7. The system according to claim 6, characterized in that Each of the battery cell voltage collection branches includes a radio frequency resistor and a voltage sensor, the voltage sensor is used to connect to the corresponding battery cell, and a first capacitor is connected between two adjacent battery cell voltage collection branches.

8. The system according to claim 5, characterized in that The current acquisition circuit includes two sampling branches arranged in parallel, one end of each sampling branch is connected to the data acquisition chip, the other end of each sampling branch is used to connect to the battery, and a first current sensing resistor and a second current sensing resistor are arranged in parallel between the two sampling branches.

9. The system according to claim 8, characterized in that Each of the sampling branches includes two sampling resistors arranged in parallel, one end of each of the sampling resistors is connected to the data acquisition chip, the other end of each of the sampling resistors is connected to the first current sensing resistor and the second current sensing resistor, and the other end of each of the sampling resistors is also used to connect to a battery.

10. The system according to claim 4, characterized in that The sub-data includes the battery cell temperature, and the data collector also includes a first temperature acquisition branch, which is connected to the data acquisition chip and the target battery cell of the battery, and is used to acquire the battery cell temperature of the target battery cell.

11. The system according to claim 10, characterized in that The first temperature acquisition branch includes a first temperature sensor, a first resistor, a second resistor, a first thermistor, a second thermistor and a first controller, one end of the first temperature sensor is connected to the fault monitor, the other end of the first temperature sensor is connected to one end of the first resistor, one end of the first controller is connected to the fault monitor, the other end of the first controller is connected to one end of the second resistor, the other end of the second resistor and the other end of the first resistor are both connected to one end of the second thermistor, the other end of the second thermistor is grounded, the second thermistor is connected in parallel with the first thermistor, and the second thermistor is used to be connected to the target battery cell.

12. The system according to claim 4, characterized in that The sub-data includes transistor temperature, the battery fault monitoring system also includes a transistor, the transistor is used to connect to the battery management system, the data collector also includes a second temperature acquisition branch, the second temperature acquisition branch is connected to both the transistor and the data acquisition chip, and the second temperature acquisition branch is used to collect transistor temperature.

13. The system according to claim 12, characterized in that The second temperature acquisition branch includes a second temperature sensor, a third resistor, a fourth resistor, a third thermistor and a second controller, one end of the second temperature sensor is connected to the fault monitor, the other end of the second temperature sensor is connected to one end of the third resistor, one end of the second controller is connected to the fault monitor, the other end of the second controller is connected to one end of the fourth resistor, the other end of the fourth resistor and the other end of the third resistor are both connected to one end of the third thermistor, the other end of the third thermistor is grounded, and the third thermistor is connected to the transistor.

14. The system according to claim 1, characterized in that The data storage device also includes multiple storage branches and output branches, at least one storage branch is connected to the fault monitor, at least one storage branch is connected to the data collector, the output branch is connected to the first storage device, each of the storage branches includes a storage resistor, and a second capacitor is connected between two adjacent storage branches.

15. The system according to claim 1, characterized in that The data storage device is used to store the monitoring data in a ring buffer, and the newly generated monitoring data overwrites the earliest stored monitoring data in the ring buffer.

16. A battery system, characterized in that: It comprises a battery and the battery fault monitoring system according to any one of claims 1 to 15.

17. An electric scooter, characterized in that: A battery system comprising the battery system of claim 16.

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