Electric bicycle battery state monitoring protection method and equipment

Abstract

The invention relates to an electric bicycle battery state monitoring protection method and equipment. The method comprises the steps of monitoring current data of an electric bicycle; determining the current state of the electric bicycle; according to the technical scheme, different settings can be carried out according to different scenes and different needs, for example, different current abnormal thresholds under the scenes of static, power-on, driving and the like can be set for different vehicle types, and corresponding processing strategies are adopted for processing different abnormal problems, so that traditional fault detection blind areas are avoided. The adaptability of the system is improved, comprehensive detection control under various environments and conditions can be supported, the battery safety of the electric bicycle is effectively improved, accidents such as fire disasters caused by battery faults are effectively prevented, equipment damage is reduced, and the riding safety of a user is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a method and device for monitoring and protecting the battery status of an electric bicycle. Background Art

[0002] The lead-acid batteries currently used in electric bicycles are not equipped with a battery protection management system, which means that problems such as overcharging, over-discharging, short circuiting, and overheating of the battery cannot be effectively monitored and protected. The lack of a protection board may cause battery performance degradation, shortened service life, and even cause safety hazards. Overcharging or over-discharging of lead-acid batteries may cause thermal runaway, increase the risk of short circuits, and even cause safety accidents such as battery leakage or explosion. The battery protection management system for lithium batteries can only be used to meet the unique charging and discharging requirements of lithium batteries, including voltage and temperature management. Since lead-acid batteries have different charging voltage ranges and discharge characteristics, the battery protection management system for lithium batteries cannot provide effective protection for lead-acid batteries. Improper use may cause the protection function to fail or impose additional burdens on lead-acid batteries.

[0003] The detection of vehicle faults mainly relies on the fuse system, which can only detect faults caused by blown fuses, but cannot identify minor faults below the fuse threshold. This limitation may result in some faults not being identified in time, thus affecting the safety and reliability of the vehicle.

[0004] Existing air switch fault detection systems have significant blind spots in identifying faults below the fuse threshold. This blind spot may cause some hidden problems to not be discovered in time, thus posing a potential threat to the overall safety of the vehicle. Summary of the invention

[0005] In order to at least overcome the problem of insufficient battery protection for electric bicycles in the related art to a certain extent, the present application provides a method and device for monitoring and protecting the battery status of an electric bicycle.

[0006] The scheme of this application is as follows: According to a first aspect of an embodiment of the present application, a method for monitoring and protecting an electric bicycle battery state is provided, comprising: Monitor the current data of electric bicycles; Determine the current status of the electric bicycle; If the electric bicycle is in a power-off state and the monitored static current exceeds a first abnormal threshold, it is determined that the electric bicycle has a static current abnormality, and a static current abnormality processing strategy is executed; If the electric bicycle is in a powered-on non-riding state, when the monitored dynamic current exceeds the second abnormal threshold, it is determined that the electric bicycle has a powered-on non-riding current abnormality, and a powered-on non-riding current abnormality processing strategy is executed; If the electric bicycle is in a powered-on riding state and the monitored dynamic current exceeds a third abnormal threshold, it is determined that the electric bicycle has a powered-on riding current abnormality, and a powered-on riding current abnormality processing strategy is executed; If the electric bicycle is in a charging state, and the monitored charging current is less than a preset multiple of the sum of the fourth abnormal threshold and the first abnormal threshold / the second abnormal threshold, it is judged that the charging current is too large and the charging abnormality handling strategy is executed; when the monitored charging current exceeds the first abnormal threshold / the second abnormal threshold, it is judged that the discharge current is too large and the discharge abnormality handling strategy is executed.

[0007] Preferably, determining the current state of the electric bicycle includes: Obtaining the power-on signal, wheel movement signal and charging signal of the electric bicycle; If the power-on signal is low, it is determined that the electric bicycle is in a power-off state; If the power-on signal is high and the wheel movement signal is low, it is determined that the electric bicycle is in the powered-on non-riding state; If the power-on signal is high and the wheel movement signal is high, it is determined that the electric bicycle is in the powered riding state; If the charging signal is low, it is determined that the electric bicycle is in a charging state.

[0008] Preferably, the static current abnormality handling strategy includes: When the monitored static current exceeds the first abnormal threshold but does not exceed the preset multiple of the first abnormal threshold, a warning message is pushed to the user; When the monitored static current exceeds a preset multiple of the first abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0009] Preferably, the power-on non-riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the second abnormal threshold, but does not exceed the preset multiple of the second abnormal threshold, a warning message is pushed to the user; When the monitored dynamic current exceeds a preset multiple of the second abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0010] Preferably, the power-on riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the third abnormal threshold value but does not exceed the preset multiple of the third abnormal threshold value, an alarm sound is sounded and a warning icon or message is displayed on the central control display screen of the electric bicycle; When the monitored dynamic current exceeds a preset multiple of the third abnormal threshold, an alarm sound is sounded, a warning icon or message is displayed on the central control display screen of the electric bicycle, and a speed reduction instruction is sent to the controller of the electric bicycle; After the speed reduction is maintained for more than a preset time, when the monitored dynamic current still exceeds a preset multiple of the third abnormal threshold, a power-off instruction is sent to the controller of the electric bicycle.

[0011] Preferably, the charging abnormality handling strategy includes: Push alarm information to the user, stop charging, and send a power-off command to the controller of the electric bicycle; Abnormal discharge handling strategies include: When the monitored charging current exceeds the first abnormal threshold value / the second abnormal threshold value, but does not exceed the preset multiple of the first abnormal threshold value / the second abnormal threshold value, a warning message is pushed to the user; When the monitored charging current exceeds a preset multiple of the first abnormal threshold value / the second abnormal threshold value, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0012] Preferably, the method further comprises: Monitor the voltage data of electric bicycles; In any state, when the monitored voltage exceeds the fifth abnormal threshold but does not exceed the preset multiple of the fifth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored voltage exceeds a preset multiple of the fifth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0013] Preferably, the method further comprises: Monitor the temperature data of electric bicycles; In any state, when the monitored temperature exceeds the sixth abnormal threshold but does not exceed the preset multiple of the sixth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored temperature exceeds a preset multiple of the sixth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0014] Preferably, after sending a power-off instruction to the controller of the electric bicycle, the method further comprises: When a reset instruction is received, the reset instruction is forwarded to the controller of the electric bicycle.

[0015] According to a second aspect of an embodiment of the present application, there is provided an electric bicycle battery status monitoring and protection device, comprising: Processor and memory; The processor and the memory are connected via a communication bus: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store a program, and the program is at least used to execute an electric bicycle battery status monitoring and protection method as described in any one of the above items.

[0016] The technical solution provided by this application may have the following beneficial effects: The electric bicycle battery status monitoring and protection method in the present application includes: monitoring the current data of the electric bicycle; determining the current status of the electric bicycle; if the electric bicycle is in a power-off state, when the monitored static current exceeds a first abnormal threshold, it is judged that the electric bicycle has a static current abnormality, and a static current abnormality processing strategy is executed; if the electric bicycle is in a powered-on non-riding state, when the monitored dynamic current exceeds a second abnormal threshold, it is judged that the electric bicycle has a powered-on non-riding current abnormality, and a powered-on non-riding current abnormality processing strategy is executed; if the electric bicycle is in a powered-on riding state, when the monitored dynamic current exceeds a third abnormal threshold, it is judged that the electric bicycle has a powered-on riding current abnormality, and a powered-on riding current abnormality processing strategy is executed; if the electric bicycle is in a charging state, when the monitored charging current is less than a preset multiple of the sum of the fourth abnormal threshold and the first abnormal threshold / the second abnormal threshold, it is judged that the charging current is too large, and a charging abnormality processing strategy is executed; when the monitored charging current exceeds the first abnormal threshold / the second abnormal threshold, it is judged that the discharge current is too large, and a discharge abnormality processing strategy is executed.

[0017] In this technical solution, different settings can be made according to different scenarios, different needs, and different battery types. For example, different current abnormality thresholds can be set for different vehicle models or different battery types in scenarios such as static, powered on, and driving, and corresponding processing strategies can be used to deal with different abnormal problems, thereby avoiding the traditional fault detection blind spots. The adaptability of the system is improved, and it can support comprehensive detection and control in a variety of environments and conditions, effectively improve the battery safety of electric bicycles, effectively prevent accidents such as fires caused by battery failures, reduce equipment damage, and ensure the riding safety of users.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 It is a flowchart of an electric bicycle battery status monitoring and protection method provided by an embodiment of the present application; Figure 2 is a schematic diagram of a flow chart of determining the current state of an electric bicycle provided by an embodiment of the present application; Figure 3 It is a schematic diagram of a framework of an electric bicycle battery status monitoring and protection method provided by an embodiment of the present application; Figure 4 It is a structural schematic diagram of an electric bicycle battery status monitoring and protection device provided by an embodiment of the present application; Figure 5 This is a diagram of the architecture of a current anomaly detection device provided by an embodiment of the present application; Figure 6 It is a schematic diagram of an implementation of an electric bicycle battery status monitoring and protection device provided in one embodiment of the present application.

[0021] Reference numerals: processor-11; memory-12. DETAILED DESCRIPTION

[0022] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0023] Embodiment 1 Figure 1 This is a flow chart of a method for monitoring and protecting the battery status of an electric bicycle provided by an embodiment of the present application, referring to Figure 1 , a method for monitoring and protecting the battery status of an electric bicycle, comprising: Monitor the current data of electric bicycles; Determine the current status of the electric bicycle; If the electric bicycle is in a power-off state and the monitored static current exceeds a first abnormal threshold, it is determined that the electric bicycle has a static current abnormality, and a static current abnormality processing strategy is executed; If the electric bicycle is in a powered-on non-riding state, when the monitored dynamic current exceeds the second abnormal threshold, it is determined that the electric bicycle has a powered-on non-riding current abnormality, and a powered-on non-riding current abnormality processing strategy is executed; If the electric bicycle is in a powered-on riding state and the monitored dynamic current exceeds a third abnormal threshold, it is determined that the electric bicycle has a powered-on riding current abnormality, and a powered-on riding current abnormality processing strategy is executed; If the electric bicycle is in a charging state, and the monitored charging current is less than a preset multiple of the sum of the fourth abnormal threshold and the first abnormal threshold / the second abnormal threshold, it is judged that the charging current is too large and the charging abnormality handling strategy is executed; when the monitored charging current exceeds the first abnormal threshold / the second abnormal threshold, it is judged that the discharge current is too large and the discharge abnormality handling strategy is executed.

[0024] It should be noted that the technical solution is applied to the state monitoring of electric bicycles, specifically to the state monitoring of the battery part of the electric bicycle. In specific practice, the technical solution can be used to monitor the state of the lead-acid battery or lithium battery in the electric bicycle.

[0025] The current lead-acid battery system is not equipped with a battery protection management system, which means that problems such as overcharging, over-discharging, short circuiting, and overheating of the battery cannot be effectively monitored and protected. In addition, since lead-acid batteries have different charging voltage ranges and discharge characteristics, the battery protection management system of lithium batteries cannot provide effective protection for lead-acid batteries. Improper use may cause the protection function to fail or impose additional burdens on lead-acid batteries.

[0026] The technical solution in the present application is compatible with lead-acid battery systems and lithium battery systems. Different current abnormality thresholds in static, power-on, driving and other scenarios can be set for different battery types to achieve status monitoring of different types of batteries.

[0027] It should be noted that the current sampling part should have high precision and high response speed to ensure that it can accurately detect changes in current and respond quickly to abnormal situations. The current sampling part uses a high-precision sampling resistor to perform low-side sampling of the entire system current. By collecting the voltage difference on both sides of the resistor, since the resistance value is a fixed value at this time, the current passing through the sampling resistor can be calculated according to Ohm's law, that is, the vehicle current. The formula is I=U / R. Among them, I is the current calculated, U is the voltage difference on both sides of the sampling resistor, and R is the resistance value of the sampling resistor.

[0028] It should be noted that to determine the current state of the electric bicycle, refer to Figure 2 ,include: Obtaining the power-on signal, wheel movement signal and charging signal of the electric bicycle; If the power-on signal is low, it is determined that the electric bicycle is in a power-off state; If the power-on signal is high and the wheel-moving signal is low, it is determined that the electric bicycle is in a powered-on, non-riding state; If the power-on signal is high and the wheel movement signal is high, it is determined that the electric bicycle is in the powered riding state; If the charging signal is low, it is determined that the electric bicycle is in a charging state.

[0029] The power-on signal is the ACC signal. The ACC signal can be used to detect whether the vehicle is powered on. The power supply part of the vehicle is divided into before locking (the normal power supply part of the vehicle) and after locking (ACC when riding is required). When riding is required, the front and rear locks need to be connected together, that is, ACC is powered on (the obvious phenomenon is that the instrument lights up and the vehicle can be ridden). When riding is not required, the front and rear locks are disconnected (that is, ACC is powered off, the obvious phenomenon is that the instrument goes out and the vehicle cannot be ridden, but the alarm can be triggered). Therefore, by introducing the ACC line of the vehicle into this device, it can be determined whether the vehicle is powered on. The ACC is high when the vehicle is powered on and low when the vehicle is powered off.

[0030] The wheel movement signal is a signal indicating whether the wheels of the electric bicycle are rotating, and can be used to determine whether the entire vehicle is in a riding / non-riding state.

[0031] The charging signal (DETC signal) can be realized by performing charger access detection, which can detect whether the charger is plugged into the vehicle. It is pulled high by default and pulled low after the charger is connected.

[0032] It should be noted that the static current abnormality handling strategy includes: When the monitored static current exceeds the first abnormal threshold but does not exceed the preset multiple of the first abnormal threshold, a warning message is pushed to the user; When the monitored static current exceeds a preset multiple of the first abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0033] It should be noted that the controller controls the power supply to be disconnected through the power-off control module to prevent battery overload or other potential risks. This module ensures that the battery will not continue to work under abnormal circumstances, thereby protecting the safety of the battery and the entire vehicle.

[0034] In specific practice, the first abnormal threshold can be set as needed.

[0035] When the vehicle ACC is in the off state (ACC signal is low), if the monitored static current exceeds the first abnormal threshold, it indicates that there may be an abnormality in the battery or circuit.

[0036] It should be noted that the preset multiple can be adjusted according to needs, and the default is 1.4 times.

[0037] If the electric bicycle is in the power-off state, and the monitored static current exceeds the first abnormal threshold but does not exceed 1.4 times the first abnormal threshold, only early warning processing is performed and the early warning information is pushed to the user; but when the monitored static current rises sharply and exceeds 1.4 times the first abnormal threshold, abnormal processing is performed to push an alarm message to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0038] It should be noted that the power-on non-riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the second abnormal threshold, but does not exceed the preset multiple of the second abnormal threshold, a warning message is pushed to the user; When the monitored dynamic current exceeds a preset multiple of the second abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0039] In specific practice, the second abnormal threshold can be set as needed.

[0040] When the vehicle ACC is turned on but the vehicle is not in riding state (ACC signal is high, no wheel movement signal), if the current exceeds the second abnormal threshold, it indicates that there may be current leakage or system abnormality.

[0041] If the electric bicycle is in the powered-on but non-riding state, and the monitored dynamic current exceeds the second abnormal threshold but does not exceed 1.4 times the second abnormal threshold, only early warning processing is performed and the early warning information is pushed to the user; but when the monitored dynamic current rises sharply and exceeds 1.4 times the second abnormal threshold, abnormal processing is performed to push an alarm message to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0042] It should be noted that the power-on riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the third abnormal threshold value but does not exceed the preset multiple of the third abnormal threshold value, an alarm sound is sounded and a warning icon or message is displayed on the central control display screen of the electric bicycle; When the monitored dynamic current exceeds a preset multiple of the third abnormal threshold, an alarm sound is sounded, a warning icon or message is displayed on the central control display screen of the electric bicycle, and a speed reduction instruction is sent to the controller of the electric bicycle; After the speed reduction is maintained for more than a preset time, when the monitored dynamic current still exceeds a preset multiple of the third abnormal threshold, a power-off instruction is sent to the controller of the electric bicycle.

[0043] In specific practice, the third abnormal threshold can be set as needed.

[0044] When the vehicle ACC is turned on and the vehicle is in riding state (ACC signal is high and there is a wheel movement signal), if the current exceeds the third abnormal threshold, this may indicate an abnormality in the battery, motor system or other key systems.

[0045] When the monitored dynamic current exceeds the third abnormal threshold, but does not exceed 1.4 times the third abnormal threshold, in order to avoid the safety risk caused by direct power failure during riding, the alarm mechanism will be activated first. The specific operations include: issuing an alarm sound (such as a continuous beep or high-frequency warning sound) and displaying a warning icon or message on the central control display of the electric bicycle to promptly remind the user of the current abnormality.

[0046] After hearing the alarm, users should immediately park the vehicle safely and check the status of the battery, motor and other systems to avoid further failures or potential dangers. This measure is intended to ensure that users can take necessary precautions in time to ensure riding safety and prevent possible damage or accidents.

[0047] When the monitored dynamic current exceeds 1.4 times the third abnormal threshold, an alarm sounds, and a warning icon or message is displayed on the central control display screen of the electric bicycle, and a speed reduction command is sent to the controller of the electric bicycle through the 485 bus interface; in order to avoid the safety risks caused by direct power failure during riding, the electric bicycle is only slowed down at this stage.

[0048] After the speed reduction is maintained for more than a preset time, if the monitored dynamic current still exceeds 1.4 times the third abnormal threshold, a power-off instruction is sent to the controller of the electric bicycle. If the current abnormality problem has not been improved after the speed reduction, the power supply of the entire vehicle is turned off.

[0049] It should be noted that the charging abnormality handling strategy includes: Push alarm information to the user, stop charging, and send a power-off command to the controller of the electric bicycle; Abnormal discharge handling strategies include: When the monitored charging current exceeds the first abnormal threshold value / the second abnormal threshold value, but does not exceed the preset multiple of the first abnormal threshold value / the second abnormal threshold value, a warning message is pushed to the user; When the monitored charging current exceeds a preset multiple of the first abnormal threshold value / the second abnormal threshold value, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0050] During the battery charging process (charger plugged in, charging current), if the current is abnormal, it may indicate an abnormality in the charging system or a battery problem. Such an abnormality may cause a decrease in battery charging efficiency or even damage the battery. Therefore, the abnormal threshold of this mode can be set as needed.

[0051] For example, the charging signal and the positive and negative of the real-time current can be used to determine whether the vehicle is charged or not. The current value is negative when charging, and positive when not charging. Assume that the real-time current of the charging bus is I, the fourth abnormal threshold is -Y, and the threshold of the first abnormal threshold / second abnormal threshold is X. When the real-time current I<1.2 times (-Y+X) (it should be noted that the preset multiple here is preferably 1.2 times, and the other preset multiples are still 1.4 times), it proves that the charging current is too large, and an alarm message is pushed to the user, charging is stopped, and a power-off instruction is sent to the controller of the electric bicycle. (The range of thresholds Y and X can be set according to actual conditions). When the discharge current is too large during the charging process, that is, the monitored charging current exceeds the first abnormal threshold / second abnormal threshold, but does not exceed 1.4 times the first abnormal threshold / second abnormal threshold, only an early warning process is performed, and an early warning message is pushed to the user. However, when the current rises sharply and exceeds 1.4 times the first abnormal threshold / second abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0052] It should be noted that the method also includes: Monitor the voltage data of electric bicycles; In any state, when the monitored voltage exceeds the fifth abnormal threshold but does not exceed the preset multiple of the fifth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored voltage exceeds a preset multiple of the fifth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0053] In specific practice, the voltage data of the electric bicycle is sampled and monitored by the resistor voltage division method. According to the formula Calculate the current battery voltage, V is the current voltage value, V REF is the sampling circuit reference voltage read by the processor, n is the AD sampling accuracy, R 总 is the total resistance of the sampling circuit, and R is the resistance of the sampling resistor.

[0054] Different fifth abnormal thresholds are set according to different vehicle power supply systems. For example, the maximum voltage of a 72V lead-acid system is 88.4V. A margin can be set to over 90V to alert the user of overvoltage. If it exceeds 100V, the vehicle power supply is immediately shut down. The voltage threshold can be set, but the maximum voltage does not exceed 120V.

[0055] It should be noted that the method also includes: Monitor the temperature data of electric bicycles; In any state, when the monitored temperature exceeds the sixth abnormal threshold but does not exceed the preset multiple of the sixth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored temperature exceeds a preset multiple of the sixth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

[0056] Specifically, this embodiment mainly monitors the battery temperature data of the electric bicycle and determines whether the battery temperature is within a safe range. The temperature detection part uses an NTC thermistor to measure the temperature. According to the resistance voltage divider formula V=V REF *R NTC / (R 1 +R NTC ) can be calculated R NTC The resistance value of the NTC can be calculated by looking up the resistance value list of the NTC. Where V is the real-time voltage sampled by the current processor, V REF The reference voltage is obtained by resistor voltage division, R 1 is the high-segment resistance of the fixed sampling, R NTC is the thermistor resistance.

[0057] The above processor is responsible for collecting and processing the data from the current sensor, voltage sensor and temperature sensor. The processor has a built-in data analysis algorithm to determine whether the current exceeds the set threshold and trigger an alarm or power off according to different situations. The battery power status is calculated based on the current integral.

[0058] Different sixth abnormal thresholds are set according to different batteries. In any state, when the monitored temperature exceeds the sixth abnormal threshold but does not exceed 1.4 times the sixth abnormal threshold, only a warning is issued and the warning information is pushed to the user; in any state, when the monitored temperature exceeds 1.4 times the sixth abnormal threshold, an alarm message is pushed to the user and a power-off instruction is sent to the controller of the electric bicycle.

[0059] Figure 3 This is a schematic diagram of a battery status monitoring and protection method for an electric bicycle provided by an embodiment of the present application, including abnormal detection and processing methods such as voltage and temperature detection. Figure 3 shown.

[0060] It should be noted that after sending a power-off instruction to the controller of the electric bicycle, the method further includes: When a reset command is received, the reset command is forwarded to the controller of the electric bicycle.

[0061] When the device shuts down the power of the whole vehicle due to a vehicle failure, the module can be reset through related operations and then continued to be used, including but not limited to manual hardware operation, device power-off operation, etc.

[0062] It should be noted that the existing technology fails to realize the remote fault notification function, and users cannot be informed in real time when a problem occurs in the vehicle. This defect may increase maintenance delays and risks, affecting the normal use of the vehicle and the user's driving experience.

[0063] In this embodiment, the current, voltage, temperature data and abnormal information of the monitored electric bicycle are also sent to the user terminal through the 4G network, so that the user can be informed in real time when there is a problem with the vehicle, avoiding maintenance delays and risks, and ensuring the normal use of the vehicle and the user's driving experience.

[0064] The existing BMS of lithium batteries can only be placed in the battery pack, while the current anomaly detection device is suitable for external use. Existing fault detection systems are usually designed for specific working scenarios, such as standard driving conditions or fixed environmental settings, which results in poor performance when dealing with changing environments and complex operating conditions. Such limitations not only limit the scope of application of the fault detection system, but also affect its reliability and effectiveness in various actual use environments. The technical solution in this embodiment improves the adaptability of the system, can support comprehensive detection and control in a variety of environments and conditions, and improve its overall performance and practicality.

[0065] Existing air switch fault detection systems have significant blind spots in identifying faults below the fuse threshold. This blind spot may cause some hidden problems to not be discovered in time, posing a potential threat to the overall safety of the vehicle. For example, fuse protection is usually used to prevent overload and short circuit, but when the current or voltage problem is below the set threshold of the fuse, the existing system may not be able to effectively detect these below-threshold anomalies. This may cause problems such as gradual aging of electrical components, poor line contact, or small-scale short circuits to go undetected, gradually evolving into more serious faults or safety hazards during vehicle operation.

[0066] The technical solution in this embodiment can be set differently according to different scenarios and different needs. For example, different thresholds for different vehicle models in scenarios such as stationary, powered on, and driving can be set to avoid traditional fault detection blind spots.

[0067] Embodiment 2 An electric bicycle battery status monitoring and protection device, referring to Figure 4 ,include: A processor 11 and a memory 12; The processor 11 and the memory 12 are connected via a communication bus: The processor 11 is used to call and execute the program stored in the memory 12; The memory 12 is used to store a program, and the program is used to execute at least one of the electric bicycle battery status monitoring and protection methods in the above embodiment.

[0068] Figure 5 This is the structure diagram of the current anomaly detection device. Figure 5 The specific architecture of the battery status monitoring and protection device for electric bicycles in this application is shown in the figure, including four parts: functional embodiment, abnormal conditions, main control and power supply. The current abnormality detection device has built-in current, voltage and temperature detection circuits. The main chip calculates the SOC by calculating and analyzing relevant data, and judges the abnormality according to the different states of the vehicle according to the different thresholds set.

[0069] Reference Figure 6 The intelligent central control is connected to the processor through a communication interface, can receive abnormal signals in real time, and has 4G communication function, sends abnormal information to the cloud platform, and then sends it to user terminals such as mobile phones and tablets via the cloud platform.

[0070] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0071] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0072] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0073] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0074] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0075] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0076] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for monitoring and protecting the battery status of an electric bicycle, characterized in that: include: Monitor the current data of electric bicycles; Determine the current status of the electric bicycle; If the electric bicycle is in a power-off state and the monitored static current exceeds a first abnormal threshold, it is determined that the electric bicycle has a static current abnormality, and a static current abnormality processing strategy is executed; If the electric bicycle is in a powered-on non-riding state, when the monitored dynamic current exceeds the second abnormal threshold, it is determined that the electric bicycle has a powered-on non-riding current abnormality, and a powered-on non-riding current abnormality processing strategy is executed; If the electric bicycle is in a powered-on riding state and the monitored dynamic current exceeds a third abnormal threshold, it is determined that the electric bicycle has a powered-on riding current abnormality, and a powered-on riding current abnormality processing strategy is executed; If the electric bicycle is in a charging state, when the monitored charging current is less than a preset multiple of the sum of the fourth abnormal threshold and the first abnormal threshold / the second abnormal threshold, it is determined that the charging current is too large, and a charging abnormality handling strategy is executed; When the monitored charging current exceeds the first abnormal threshold / the second abnormal threshold, it is determined that the discharge current is too large and a discharge abnormality handling strategy is executed.

2. The method according to claim 1, characterized in that: Determine the current status of the e-bike, including: Obtaining the power-on signal, wheel movement signal and charging signal of the electric bicycle; If the power-on signal is low, it is determined that the electric bicycle is in a power-off state; If the power-on signal is high and the wheel-moving signal is low, it is determined that the electric bicycle is in a powered-on, non-riding state; If the power-on signal is high and the wheel movement signal is high, it is determined that the electric bicycle is in the powered riding state; If the charging signal is low, it is determined that the electric bicycle is in a charging state.

3. The method according to claim 1, characterized in that Static current abnormality handling strategy, including: When the monitored static current exceeds the first abnormal threshold but does not exceed the preset multiple of the first abnormal threshold, a warning message is pushed to the user; When the monitored static current exceeds a preset multiple of the first abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

4. The method according to claim 1, characterized in that: The power-on non-riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the second abnormal threshold but does not exceed the preset multiple of the second abnormal threshold, a warning message is pushed to the user; When the monitored dynamic current exceeds a preset multiple of the second abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

5. The method according to claim 1, characterized in that The power-on riding current abnormality handling strategy includes: When the monitored dynamic current exceeds the third abnormal threshold value but does not exceed the preset multiple of the third abnormal threshold value, an alarm sound is sounded, and a warning icon or message is displayed on the central control display screen of the electric bicycle; When the monitored dynamic current exceeds a preset multiple of the third abnormal threshold, an alarm sound is sounded, a warning icon or message is displayed on the central control display screen of the electric bicycle, and a speed reduction instruction is sent to the controller of the electric bicycle; After the speed reduction is maintained for more than a preset time, when the monitored dynamic current still exceeds a preset multiple of the third abnormal threshold, a power-off instruction is sent to the controller of the electric bicycle.

6. The method according to claim 1, characterized in that Charging abnormality handling strategy, including: Push alarm information to the user, stop charging, and send a power-off command to the controller of the electric bicycle; Abnormal discharge handling strategies include: When the monitored charging current exceeds the first abnormal threshold value / the second abnormal threshold value, but does not exceed the preset multiple of the first abnormal threshold value / the second abnormal threshold value, a warning message is pushed to the user; When the monitored charging current exceeds a preset multiple of the first abnormal threshold value / the second abnormal threshold value, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

7. The method according to claim 1, characterized in that The method further comprises: Monitor the voltage data of electric bicycles; In any state, when the monitored voltage exceeds the fifth abnormal threshold but does not exceed the preset multiple of the fifth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored voltage exceeds a preset multiple of the fifth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

8. The method according to claim 1, characterized in that The method further comprises: Monitor the temperature data of electric bicycles; In any state, when the monitored temperature exceeds the sixth abnormal threshold but does not exceed the preset multiple of the sixth abnormal threshold, a warning message is pushed to the user; In any state, when the monitored temperature exceeds a preset multiple of the sixth abnormal threshold, an alarm message is pushed to the user, and a power-off instruction is sent to the controller of the electric bicycle.

9. The method according to claim 1, characterized in that: After sending a power-off instruction to the controller of the electric bicycle, the method further includes: When a reset instruction is received, the reset instruction is forwarded to the controller of the electric bicycle.

10. An electric bicycle battery status monitoring and protection device, characterized in that: include: Processor and memory; The processor and the memory are connected via a communication bus: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store a program, and the program is at least used to execute an electric bicycle battery status monitoring and protection method as described in any one of claims 1-9.

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