Electric motorcycle battery protection system and protection method thereof

Abstract

The invention provides an electric motorcycle battery protection system and a protection method thereof, and relates to the technical field of battery protection. Determining the state balance characteristic of the single battery in the active balance mode according to the characteristic difference between the charging states and the charging balance characteristic; obtaining the health state information of a single battery in the electric motorcycle, and determining the balance supplement amount of each battery pack in a passive balance mode according to the aging loss characteristic and the energy loss characteristic of each battery pack in the electric motorcycle; the charge state balance degree of the electric motorcycle under dual-mode balance is determined according to the balance supplement amount and the state balance characteristics, and balance adjustment is carried out on the charging protection strategy of the electric motorcycle based on the charge state balance degree. Therefore, the charging safety balance of the electric motorcycle can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery protection, and more specifically, to an electric motorcycle battery protection system and a protection method thereof. Background Art

[0002] With the widespread use of electric motorcycles, the performance, life and safety of batteries as the core components of the power source have gradually become the focus of industry attention. Electric motorcycles usually use lithium-ion batteries, which have become the mainstream choice due to their high energy density and long battery life. However, the service life and safety of batteries are affected by many factors, such as overcharging, over-discharging, voltage imbalance and temperature changes. If not effectively managed, it may cause battery damage, fire or even explosion, seriously affecting the user experience and safety.

[0003] During the charging process of electric motorcycles, traditional battery management systems mainly prevent overcharging and over-discharging of batteries by monitoring the overall voltage, current and temperature of the battery pack. However, in actual charging, due to the possible differences in performance, health status and charging status between each battery pack, traditional battery management systems often fail to fully handle the charge differences between battery cells. This charge imbalance may cause some battery cells to be overcharged or over-discharged, thereby affecting the overall safety and life of the battery pack. Therefore, how to achieve balanced charge regulation of each battery pack during the charging process of electric motorcycles, thereby improving the safety balance of electric motorcycle charging, is a difficult problem faced by the industry. Summary of the invention

[0004] The present application provides an electric motorcycle battery protection system and a protection method thereof, which can realize balanced regulation of the charge state of each battery pack of the electric motorcycle during the charging process, thereby improving the safety balance of the electric motorcycle charging.

[0005] In a first aspect, the present application provides an electric motorcycle battery protection method, the battery protection method comprising the following steps: During the battery charging process of the electric motorcycle, the charging information of each battery pack in the electric motorcycle is monitored to obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; Extracting the charging state of each battery pack in the electric motorcycle from each charging information, and then determining the state balancing characteristics of the single battery in the electric motorcycle in the active balancing mode through the characteristic differences between the various charging states and the charging balancing characteristics; Acquire health status information of single cells in the electric motorcycle, extract aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss characteristic and the energy loss characteristic; The charge state balance degree of the electric motorcycle under dual-mode balance is determined by the balance supplement amount and the state balance characteristic, and the charging protection strategy of the electric motorcycle is balanced and adjusted based on the charge state balance degree.

[0006] In this embodiment, a voltage sensor, a current sensor, and a temperature sensor are used to monitor the charging information of each battery pack in the electric motorcycle.

[0007] In this embodiment, extracting the charging status of each battery pack in the electric motorcycle from each charging information specifically includes: For each battery pack in the electric motorcycle, the charge, charging rate and temperature characteristics of the battery pack are extracted from the charging information of the battery pack; The charging state of the battery pack is determined by the charge amount, the charging rate and the temperature characteristics, and then the charging state of each battery pack in the electric motorcycle is obtained.

[0008] In this embodiment, determining the state balance characteristics of the single battery of the electric motorcycle in the active balance mode by the characteristic differences between the various charging states and the charging balance characteristics specifically includes: For each battery pack in the electric motorcycle, extracting a charge balance value of the battery pack from the charge balance characteristic; Extracting a state difference value of the battery pack from the feature differences between various charging states; Determining the charging balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charging balance value and the state difference value, and then obtaining the charging balance degree of each battery pack of the electric motorcycle in the active balancing mode; The state balance characteristics of the single battery of the electric motorcycle in the active balancing mode are determined through all the charging balance degrees.

[0009] In this embodiment, extracting the aging loss characteristics of each battery pack in the electric motorcycle from the health status information specifically includes: For each battery pack in the electric motorcycle, obtaining the current health status of the battery pack from the health status information; extracting an aging curve of the battery pack from the health status information; The aging loss characteristics of the battery pack are determined by the current health state and the aging curve, and then the aging loss characteristics of each battery pack in the electric motorcycle are obtained.

[0010] In this embodiment, determining the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss feature and the energy loss characteristic specifically includes: For each battery pack in the electric motorcycle, extracting an energy loss value of the battery pack in a passive balancing mode from the energy loss characteristics; The balancing replenishment amount of the battery pack in the passive balancing mode is determined by the energy loss value and the aging loss characteristics of the battery pack, and then the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is obtained.

[0011] In this embodiment, determining the charge state balance degree of the electric motorcycle under dual-mode balance by the balance replenishment amount and the state balance characteristic is to use the sum of the balance replenishment amount and the state balance characteristic as the charge state balance degree of the electric motorcycle under dual-mode balance.

[0012] In this embodiment, the active balancing mode is a method for balancing the voltage differences of single cells in a battery pack by means of energy transfer.

[0013] In this embodiment, the passive balancing mode is a method for balancing battery voltage differences by consuming excess power of some single cells in a battery pack.

[0014] In a second aspect, the present application provides an electric motorcycle battery protection system for executing an electric motorcycle battery protection method, the battery protection system comprising: A monitoring and acquisition module is used to monitor the charging information of each battery pack in the electric motorcycle during the battery charging process of the electric motorcycle, and obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; An active balancing module is used to extract the charging state of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery of the electric motorcycle in the active balancing mode through the characteristic differences between the various charging states and the charging balancing characteristics; A passive balancing module, used to obtain health status information of a single battery in the electric motorcycle, and then extract aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss characteristic and the energy loss characteristic; The balancing adjustment module is used to determine the charge state balance degree of the electric motorcycle under dual-mode balance through the balance supplement amount and the state balance characteristic, and to balance and adjust the charging protection strategy of the electric motorcycle based on the charge state balance degree.

[0015] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects: During the battery charging process of the electric motorcycle, the charging information of each battery pack in the electric motorcycle is monitored to obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balancing mode and the energy loss characteristics in the passive balancing mode; the charging state of each battery pack in the electric motorcycle is extracted from each charging information, and then the state balance characteristics of the single battery in the electric motorcycle in the active balancing mode are determined through the characteristic differences between each charging state and the charging balance characteristics; the health status information of the single battery in the electric motorcycle is obtained, and then the aging loss characteristics of each battery pack in the electric motorcycle are extracted from the health status information, and the balance replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is determined according to each aging loss characteristic and the energy loss characteristic; the charge state balance degree of the electric motorcycle under dual-mode balancing is determined through the balance replenishment amount and the state balance characteristics, and the charging protection strategy of the electric motorcycle is balanced and adjusted based on the charge state balance degree.

[0016] It can be seen that in the present application, firstly, during the battery charging process of the electric motorcycle, the state balance characteristics of the single battery are determined to obtain the balance degree of the battery charging state of the electric motorcycle in the active balancing mode, thereby dynamically adjusting the charging process of the single battery in each battery pack, minimizing the difference between the batteries, achieving more efficient battery balance, avoiding overcharging of certain batteries, and thus improving the safety and stability of the charging process. The precise state balance characteristics not only ensure the charging balance of the battery pack, but also improve the charging efficiency of the electric motorcycle and extend the battery life; then, the balance replenishment amount of the battery pack in the passive balancing mode can be determined to obtain the balance replenishment amount in the passive balancing mode. The amount of energy replenishment required to ensure the voltage balance of the battery pack can be accurately determined by evaluating and calculating the balancing replenishment amount, thereby balancing the voltage differences between each battery cell. In the passive balancing mode, the balancing replenishment amount is carried out by adjusting the external circuit or using the energy recovery mechanism, which helps to accurately restore the balanced state of the battery pack and effectively avoid excessive loss or premature aging of the single battery due to long-term imbalance, so as to optimize the energy distribution of the battery pack during the charging process through the replenishment mechanism, thereby ensuring the safety of electric motorcycle charging and the balanced state of each battery pack during the charging process, effectively extending the battery life, and improving the safety and balance of the overall charging of the electric motorcycle.

[0017] In summary, the technical solution adopted in the present application can achieve balanced regulation of the charge state of each battery pack during the charging process of the electric motorcycle, thereby improving the safety balance of the charging of the electric motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a flow chart of an electric motorcycle battery protection method provided by the present application; Figure 2 is an exemplary flow chart for determining the charging state of each battery pack in an electric motorcycle according to the present application; Figure 3 It is a module structure diagram of an electric motorcycle battery protection system provided according to the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The embodiment of the present application provides an electric motorcycle battery protection system and a protection method thereof, the core of which is to monitor the charging information of each battery pack in the electric motorcycle during the battery charging process of the electric motorcycle, obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; extract the charging state of each battery pack in the electric motorcycle from each charging information, and then determine the state balance characteristics of the single battery in the electric motorcycle in the active balance mode through the characteristic differences between each charging state and the charging balance characteristics; obtain the health status information of the single battery in the electric motorcycle, and then extract the aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balance replenishment amount of each battery pack in the electric motorcycle in the passive balance mode according to each aging loss characteristic and the energy loss characteristic; determine the charge state balance degree of the electric motorcycle under dual-mode balance through the balance replenishment amount and the state balance characteristic, and balance the charging protection strategy of the electric motorcycle based on the charge state balance degree. The above scheme can realize the balanced adjustment of the charge state during the charging process of each battery pack of the electric motorcycle, thereby improving the safety balance of the charging of the electric motorcycle.

[0022] Embodiment 1: In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1 As shown in FIG. 1 , this figure is an exemplary flow chart of an electric motorcycle battery protection method according to this embodiment of the present application, and the battery protection method includes the following steps: In step S1, during the battery charging process of the electric motorcycle, the charging information of each battery pack in the electric motorcycle is monitored to obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode.

[0023] It should be noted that, in the present application, the active balancing mode is a method for balancing the voltage differences of single cells in a battery pack by means of energy transfer; the passive balancing mode is a method for balancing the voltage differences of batteries by consuming excess electrical energy of some single cells in the battery pack; in specific implementation, during the battery charging process of an electric motorcycle, first, monitoring the charging information of each battery pack in the electric motorcycle can be achieved by using voltage sensors, current sensors and temperature sensors. These sensors collect the working status of the battery pack in real time and transmit it to the battery management system through a data acquisition system. On this basis, the charging status of each single cell can be monitored in real time, and the voltage, current and temperature of each battery can be obtained, so as to analyze the performance of the battery during the charging process; then, the charging balancing characteristics of the single cell in the active balancing mode are obtained, mainly by adjusting the voltage differences of the single cells through an active balancing device such as a DC-DC converter, so as to balance the energy between the batteries during the charging process. In the active balancing mode, the battery management system will monitor the battery voltage and current in real time. The difference is automatically adjusted to adjust the charging rate of each battery, optimize the charging process of the battery pack, and ensure that each battery pack remains in a balanced state, so that the set of difference values ​​between the voltage and current in each battery pack can be used as the charging balance characteristics of the single battery in the electric motorcycle in the active balancing mode; while in the passive balancing mode, the energy loss characteristics monitor the energy loss process of the battery through the battery management system, such as: the heat generated by the resistor during the charging process; the passive balancing mode can convert the overcharged battery power into heat and release it through a resistive load, thereby balancing the voltage difference inside the battery pack, so that the average value of the heat converted and released by each battery pack can be used as the energy loss value of the corresponding battery pack, and the set of all energy loss values ​​can be used as the energy loss characteristic in the passive balancing mode; under the dual-mode balancing of active balancing mode and passive balancing mode, by real-time monitoring of the voltage, current, temperature and other data of the battery pack, combined with the balancing characteristics and energy loss characteristics, the battery management system can finely adjust the balance and efficiency during the charging process to ensure the safety of the electric motorcycle battery and extend its service life.

[0024] In step S2, the charging state of each battery pack in the electric motorcycle is extracted from each charging information, and then the state balance characteristics of the single battery of the electric motorcycle in the active balancing mode are determined according to the characteristic differences between the various charging states and the charging balance characteristics.

[0025] Preferably, in this embodiment, reference Figure 2 As shown in FIG. 1 , this figure is an exemplary flow chart of determining the charging status of each battery pack in the electric motorcycle in an embodiment of the present application. In this embodiment, the charging status of each battery pack in the electric motorcycle can be extracted from each charging information by the following steps: First, in step S21, for each battery pack in the electric motorcycle, the charge, charging rate and temperature characteristics of the battery pack are extracted from the charging information of the battery pack; First, in step S22, the charging state of the battery pack is determined according to the charge amount, the charging rate and the temperature characteristic, and then the charging state of each battery pack in the electric motorcycle is obtained.

[0026] It should be noted that, in the present application, the charging state represents the charge change law of the battery pack in the electric motorcycle during the charging process; in specific implementation, first, for each battery pack in the electric motorcycle, the current change value per unit time obtained by the current sensor monitoring the battery pack is obtained from the charging information of the battery pack as the charging rate of the battery pack, the average value of the voltage obtained by the voltage sensor monitoring the battery pack is obtained from the charging information of the battery pack as the charge of the battery pack, and the curve of the temperature value obtained by the temperature sensor monitoring the battery pack is obtained from the charging information of the battery pack as the temperature characteristic of the battery pack; then, the combination of the charge, charging rate and temperature characteristics can be used as the charging state of the battery pack, and the charging state of each battery pack in the electric motorcycle can be obtained in the above manner.

[0027] In this embodiment, the following steps can be used to determine the state balance characteristics of the single battery of the electric motorcycle in the active balance mode through the characteristic differences between the various charging states and the charging balance characteristics: For each battery pack in the electric motorcycle, extracting a charge balance value of the battery pack from the charge balance characteristic; Extracting a state difference value of the battery pack from the feature differences between various charging states; Determining the charging balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charging balance value and the state difference value, and then obtaining the charging balance degree of each battery pack of the electric motorcycle in the active balancing mode; The state balance characteristics of the single battery of the electric motorcycle in the active balancing mode are determined through all the charging balance degrees.

[0028] It should be noted that, in the present application, the state balance feature represents the degree of balance of the battery charging state of the electric motorcycle in the active balancing mode; in specific implementation, first, the difference value between the voltage and the current in the battery pack is obtained from the charging balance characteristic as the charging balance value of the battery pack, and the charging balance value reflects the balanced state of energy distribution of the battery pack during the charging process; secondly, the cosine similarity between each charging state can be used as the characteristic difference between each battery pack, and the characteristic difference of the battery pack is screened and designed from all the characteristic differences, so that the mean of all characteristic differences can be used as the state difference value of the battery pack, wherein the state difference value reflects the difference in the charging process between the battery pack and the electric motorcycle as a whole; then, the product of the charging balance value and the state difference value can be used as the charging balance degree of the battery pack of the electric motorcycle in the active balancing mode, and the charging balance degree of the battery pack of the electric motorcycle in the active balancing mode can be obtained by the above method, and the charging balance degree is a parameter to measure the balance between the battery cells in the entire battery pack. The higher the charging balance degree means that the charging state of each single cell in the battery pack is more consistent, thereby improving the overall charging efficiency of the battery pack and extending the service life of the battery; finally, the standard deviation of all charging balance degrees can be used as the state balance feature of the single cell of the electric motorcycle in the active balancing mode.

[0029] In step S3, the health status information of the single battery in the electric motorcycle is obtained, and then the aging loss characteristics of each battery pack in the electric motorcycle are extracted from the health status information, and the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is determined according to each aging loss characteristic and the energy loss characteristic.

[0030] It should be noted that, in the present application, the health status information represents the change information of the electric energy storage capacity of the single battery in the electric motorcycle; in specific implementation, the electric energy storage capacity of the single battery of the electric motorcycle at fixed intervals (the default is 1 day) within a fixed time period (the default is the most recent 1 month) can be obtained from the control console of the electric motorcycle, so that the collection of all the electric energy storage capacities can be used as the health status information of the single battery in the electric motorcycle.

[0031] In this embodiment, the aging loss characteristics of each battery pack in the electric motorcycle can be extracted from the health status information by the following steps: For each battery pack in the electric motorcycle, obtaining the current health status of the battery pack from the health status information; extracting an aging curve of the battery pack from the health status information; The aging loss characteristics of the battery pack are determined by the current health state and the aging curve, and then the aging loss characteristics of each battery pack in the electric motorcycle are obtained.

[0032] It should be noted that, in the present application, the aging loss characteristics are characteristics that reflect the degradation of the battery pack in different usage cycles; in specific implementation, first, for each battery pack in the electric motorcycle, the electric energy storage capacity at the current moment in the health status information can be used as the current health status of the battery pack; then, all the electric energy storage capacities in the health status information can be connected in chronological order on the coordinate axis as the aging curve of the battery pack; finally, the mean of the slopes of each fixed interval point in the aging curve can be calculated as the aging rate of the battery pack at the corresponding fixed interval point, thereby taking the mean of all aging rates and the set of the current health status as the aging loss characteristics of the battery pack. The aging loss characteristics of each battery pack in the electric motorcycle can be obtained in the above manner.

[0033] In this embodiment, the following steps can be used to determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss feature and the energy loss characteristic: For each battery pack in the electric motorcycle, extracting an energy loss value of the battery pack in a passive balancing mode from the energy loss characteristics; The balancing replenishment amount of the battery pack in the passive balancing mode is determined by the energy loss value and the aging loss characteristics of the battery pack, and then the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is obtained.

[0034] In the specific implementation, first, for each battery pack in the electric motorcycle, the energy loss value of the battery pack in the energy loss characteristic can be used as the energy loss value of the battery pack in the passive balancing mode; then, an electrical model based on energy conservation is initialized, the energy loss value is used as the internal resistance loss in the electrical model, and the aging loss characteristics of the battery pack are used as the capacity attenuation characteristics in the electrical model. The electrical model is used to quantitatively analyze the compensation amount of the battery pack in the passive balancing mode for the balance degree between the battery packs in the active balancing mode, so that the result of the quantitative analysis can be used as the balance supplement amount of the battery pack in the passive balancing mode. The balance supplement amount of each battery pack in the electric motorcycle in the passive balancing mode can be obtained in the above manner.

[0035] It should be noted that the balancing replenishment amount represents the amount of energy replenishment required to ensure the voltage balance of the battery pack in the passive balancing mode; the energy loss value represents the energy loss released by the battery in the passive balancing mode to balance the charge balance between the battery packs during the charging and discharging process; the electrical model is constructed based on the principle of energy conservation, and is intended to analyze the transfer and loss of energy during the charging and discharging process of the battery pack. In the electrical model, the energy loss value is the internal resistance loss in the input variable of the electrical model, which reflects the energy loss caused by factors such as internal resistance and temperature change during the charging process of the battery; and the aging loss characteristics of the battery pack are the capacity attenuation characteristics of another input of the electrical model, which represents the impact of the aging phenomenon of the battery during use on the energy efficiency. Based on the internal resistance loss and aging loss characteristics, the electrical model calculates the energy flow and loss of the battery pack in the passive balancing mode through the principle of energy conservation, and then estimates the balancing compensation required due to the voltage difference between the battery packs in the active balancing mode; the electrical model can accurately and quantitatively analyze the compensation amount, thereby providing the necessary energy replenishment strategy for the charging process of the battery pack in the passive balancing mode, and realizing the optimization of the charging balance of the battery pack.

[0036] In step S4, the charge state balance degree of the electric motorcycle under dual-mode balance is determined by the balance supplement amount and the state balance characteristic, and the charging protection strategy of the electric motorcycle is balanced and adjusted based on the charge state balance degree.

[0037] In this embodiment, determining the charge state balance degree of the electric motorcycle under dual-mode balance by the balance replenishment amount and the state balance characteristic is to use the sum of the balance replenishment amount and the state balance characteristic as the charge state balance degree of the electric motorcycle under dual-mode balance.

[0038] In this embodiment, the balanced adjustment of the charging protection strategy of the electric motorcycle based on the state of charge balance can be achieved in the following manner, that is, the charging balance threshold of the electric motorcycle can be preset according to historical experience, and when the state of charge balance is greater than the preset charging balance threshold, the SOC module in the battery management system is used to balance the charging protection strategy of the electric motorcycle until the state of charge balance is less than or equal to the preset charging balance threshold.

[0039] It can be seen that in the present application, firstly, during the battery charging process of the electric motorcycle, the state balance characteristics of the single battery are determined to obtain the balance degree of the battery charging state of the electric motorcycle in the active balancing mode, thereby dynamically adjusting the charging process of the single battery in each battery pack, minimizing the difference between the batteries, achieving more efficient battery balance, avoiding overcharging of certain batteries, and thus improving the safety and stability of the charging process. The precise state balance characteristics not only ensure the charging balance of the battery pack, but also improve the charging efficiency of the electric motorcycle and extend the battery life; then, the balance replenishment amount of the battery pack in the passive balancing mode can be determined to obtain the balance replenishment amount in the passive balancing mode. The amount of energy replenishment required to ensure the voltage balance of the battery pack can be accurately determined by evaluating and calculating the balancing replenishment amount, thereby balancing the voltage differences between each battery cell. In the passive balancing mode, the balancing replenishment amount is carried out by adjusting the external circuit or using the energy recovery mechanism, which helps to accurately restore the balanced state of the battery pack and effectively avoid excessive loss or premature aging of the single battery due to long-term imbalance, so as to optimize the energy distribution of the battery pack during the charging process through the replenishment mechanism, thereby ensuring the safety of electric motorcycle charging and the balanced state of each battery pack during the charging process, effectively extending the battery life, and improving the safety and balance of the overall charging of the electric motorcycle.

[0040] In summary, the technical solution adopted in the present application can achieve balanced regulation of the charge state of each battery pack during the charging process of the electric motorcycle, thereby improving the safety balance of the charging of the electric motorcycle.

[0041] Embodiment 2: This application provides an electric motorcycle battery protection system, referring to Figure 3 As shown, this figure is a schematic diagram of an electric motorcycle battery protection system according to this embodiment of the present application, and the battery protection system includes: The monitoring and obtaining module 100 is used to monitor the charging information of each battery pack in the electric motorcycle during the battery charging process of the electric motorcycle, and obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; The active balancing module 200 is used to extract the charging state of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery of the electric motorcycle in the active balancing mode according to the characteristic differences between the various charging states and the charging balancing characteristics; The passive balancing module 300 is used to obtain health status information of the single battery in the electric motorcycle, and then extract the aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss characteristic and the energy loss characteristic; The balancing adjustment module 400 is used to determine the charge state balance degree of the electric motorcycle under dual-mode balance according to the balance supplement amount and the state balance characteristic, and to balance and adjust the charging protection strategy of the electric motorcycle based on the charge state balance degree.

[0042] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0043] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, the storage medium including a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically-erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0044] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

Claims

1. A method for protecting an electric motorcycle battery, characterized in that: The battery protection method comprises the following steps: During the battery charging process of the electric motorcycle, the charging information of each battery pack in the electric motorcycle is monitored to obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; Extracting the charging state of each battery pack in the electric motorcycle from each charging information, and then determining the state balancing characteristics of the single battery in the electric motorcycle in the active balancing mode through the characteristic differences between the various charging states and the charging balancing characteristics; Acquire health status information of single cells in the electric motorcycle, extract aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss characteristic and the energy loss characteristic; The charge state balance degree of the electric motorcycle under dual-mode balance is determined by the balance supplement amount and the state balance characteristic, and the charging protection strategy of the electric motorcycle is balanced and adjusted based on the charge state balance degree.

2. The electric motorcycle battery protection method according to claim 1, characterized in that: Use voltage sensors, current sensors, and temperature sensors to monitor the charging information of each battery pack in an electric motorcycle.

3. The electric motorcycle battery protection method according to claim 1, characterized in that: Extracting the charging status of each battery pack in the electric motorcycle from each charging information specifically includes: For each battery pack in the electric motorcycle, the charge, charging rate and temperature characteristics of the battery pack are extracted from the charging information of the battery pack; The charging state of the battery pack is determined by the charge amount, the charging rate and the temperature characteristics, and then the charging state of each battery pack in the electric motorcycle is obtained.

4. The electric motorcycle battery protection method according to claim 1, characterized in that: Determining the state balance characteristics of the single battery of the electric motorcycle in the active balance mode by using the characteristic differences between the various charging states and the charging balance characteristics specifically includes: For each battery pack in the electric motorcycle, extracting a charge balance value of the battery pack from the charge balance characteristic; Extracting a state difference value of the battery pack from the feature differences between various charging states; Determining the charging balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charging balance value and the state difference value, and then obtaining the charging balance degree of each battery pack of the electric motorcycle in the active balancing mode; The state balance characteristics of the single battery of the electric motorcycle in the active balancing mode are determined through all the charging balance degrees.

5. The electric motorcycle battery protection method according to claim 1, characterized in that: Extracting the aging loss characteristics of each battery pack in the electric motorcycle from the health status information specifically includes: For each battery pack in the electric motorcycle, obtaining the current health status of the battery pack from the health status information; extracting an aging curve of the battery pack from the health status information; The aging loss characteristics of the battery pack are determined by the current health state and the aging curve, and then the aging loss characteristics of each battery pack in the electric motorcycle are obtained.

6. The electric motorcycle battery protection method according to claim 1, characterized in that: Determining the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss feature and the energy loss characteristic specifically includes: For each battery pack in the electric motorcycle, extracting an energy loss value of the battery pack in a passive balancing mode from the energy loss characteristics; The balancing replenishment amount of the battery pack in the passive balancing mode is determined by the energy loss value and the aging loss characteristics of the battery pack, and then the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is obtained.

7. The electric motorcycle battery protection method according to claim 1, characterized in that: Determining the charge state balance degree of the electric motorcycle under dual-mode balance by using the balance replenishment amount and the state balance characteristic is to use the sum of the balance replenishment amount and the state balance characteristic as the charge state balance degree of the electric motorcycle under dual-mode balance.

8. The electric motorcycle battery protection method according to claim 1, characterized in that: The active balancing mode is a method for balancing the voltage differences of single cells in a battery pack by means of energy transfer.

9. The electric motorcycle battery protection method according to claim 1, characterized in that: The passive balancing mode is a method for balancing battery voltage differences by consuming excess power from some single cells in a battery pack.

10. An electric motorcycle battery protection system, used to execute an electric motorcycle battery protection method as claimed in any one of claims 1 to 9, characterized in that: The battery protection system comprises: A monitoring and acquisition module is used to monitor the charging information of each battery pack in the electric motorcycle during the battery charging process of the electric motorcycle, and obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balance mode and the energy loss characteristics in the passive balance mode; An active balancing module is used to extract the charging state of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery of the electric motorcycle in the active balancing mode through the characteristic differences between the various charging states and the charging balancing characteristics; A passive balancing module, used to obtain health status information of a single battery in the electric motorcycle, and then extract aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode according to each aging loss characteristic and the energy loss characteristic; The balancing adjustment module is used to determine the charge state balance degree of the electric motorcycle under dual-mode balance through the balance supplement amount and the state balance characteristic, and to balance and adjust the charging protection strategy of the electric motorcycle based on the charge state balance degree.

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