Electric motorcycle battery protection system and protection method

Abstract

The present application provides an electric motorcycle battery protection system and a protection method thereof, which relate to the field of battery protection technology. The system extracts the charging status of each battery pack in the electric motorcycle from various charging information, and then determines the state balance characteristics of the single battery in the active balancing mode through the characteristic differences between the various charging states and the charging balance characteristics; obtains the health status information of the single battery in the electric motorcycle, and determines the balance replenishment amount of each battery pack in the passive balancing mode according to the aging loss characteristics and energy loss characteristics of each battery pack in the electric motorcycle; determines the charge state balance degree of the electric motorcycle under dual-mode balancing through the balance replenishment amount and the state balance characteristics, and performs balance adjustment on the charging protection strategy of the electric motorcycle based on the charge state balance degree. The present application can realize the balance adjustment of the charge state of each battery pack in the charging process of the electric motorcycle, thereby improving the safety and balance of the charging of the electric motorcycle.

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, lifespan 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 an electric motorcycle, traditional battery management systems primarily monitor the overall voltage, current, and temperature of the battery pack to prevent overcharging and over-discharging. However, due to differences in performance, health, and state of charge between individual battery packs, traditional battery management systems often fail to fully address the charge differences between individual cells. This charge imbalance can cause some cells to be overcharged or over-discharged, affecting the overall safety and lifespan of the battery pack. Therefore, achieving balanced state of charge for each battery pack during charging, thereby improving the safety and balance of electric motorcycle charging, is a challenge facing the industry. Summary of the Invention

[0004] The present application provides an electric motorcycle battery protection system and protection method thereof, which can achieve balanced adjustment 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 a method for protecting an electric motorcycle battery, the method comprising the following steps:

[0006] 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;

[0007] Extracting the charging status 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 based on the characteristic differences between the various charging statuses and the charging balancing characteristics;

[0008] Obtaining health status information of single batteries in the electric motorcycle, extracting aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determining a balancing replenishment amount for each battery pack in the electric motorcycle in a passive balancing mode based on the aging loss characteristics and the energy loss characteristics;

[0009] The charge state balance degree of the electric motorcycle under dual-mode balance is determined by the balance replenishment 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.

[0010] 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.

[0011] In this embodiment, extracting the charging status of each battery pack in the electric motorcycle from each charging information specifically includes:

[0012] 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;

[0013] The charging state of the battery pack is determined according to the charge amount, the charging rate and the temperature characteristic, thereby obtaining the charging state of each battery pack in the electric motorcycle.

[0014] In this embodiment, determining the state balance characteristics of the single battery of the electric motorcycle in the active balancing mode by using the characteristic differences between the various charging states and the charging balance characteristics specifically includes:

[0015] For each battery pack in the electric motorcycle, extracting a charge balance value of the battery pack from the charge balance characteristic;

[0016] Extracting a state difference value of the battery pack from the feature differences between various charging states;

[0017] determining a charge balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charge balance value and the state difference value, thereby obtaining a charge balance degree of each battery pack of the electric motorcycle in the active balancing mode;

[0018] 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.

[0019] In this embodiment, extracting the aging loss characteristics of each battery pack in the electric motorcycle from the health status information specifically includes:

[0020] For each battery pack in the electric motorcycle, obtaining the current health status of the battery pack from the health status information;

[0021] extracting an aging curve of the battery pack from the health status information;

[0022] The aging loss characteristics of the battery pack are determined by using the current health state and the aging curve, thereby obtaining the aging loss characteristics of each battery pack in the electric motorcycle.

[0023] 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 characteristic and the energy loss characteristic specifically includes:

[0024] 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;

[0025] 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, thereby obtaining the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode.

[0026] 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.

[0027] 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.

[0028] In this embodiment, the passive balancing mode is a method for balancing battery voltage differences by consuming excess power from some of the single cells in the battery pack.

[0029] 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:

[0030] 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 balancing mode and the energy loss characteristics in the passive balancing mode;

[0031] An active balancing module is used to extract the charging status of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery in the electric motorcycle in the active balancing mode based on the characteristic differences between the various charging statuses and the charging balancing characteristics;

[0032] a passive balancing module for obtaining health status information of single batteries in the electric motorcycle, extracting aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determining a balancing replenishment amount for each battery pack in the electric motorcycle in a passive balancing mode based on the aging loss characteristics and the energy loss characteristics;

[0033] The balancing adjustment module is used to determine the charge state balance degree of the electric motorcycle under dual-mode balance based on the balance replenishment amount and the state balance characteristic, and to perform balance adjustment on the charging protection strategy of the electric motorcycle based on the charge state balance degree.

[0034] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects:

[0035] 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 of the single battery 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 the various charging states 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 the various aging loss characteristics and the energy loss characteristics; 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.

[0036] It can be seen that in this application, first, 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 balancing, 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 battery pack voltage balance can be accurately determined by evaluating and calculating the balancing replenishment amount, thereby balancing the voltage differences between each battery cell. In passive balancing mode, the balancing replenishment amount is carried out by adjusting the external circuit or using an energy recovery mechanism, which helps to accurately restore the balanced state of the battery pack and effectively avoid excessive loss or premature aging of single cells due to long-term imbalance, making it easier 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 charging, effectively extending the battery life, and improving the safety and balance of the overall charging of the electric motorcycle.

[0037] In summary, the technical solution adopted in the present application can achieve balanced regulation of the state of charge of each battery pack during the charging process of the electric motorcycle, thereby improving the safety and balance of the charging of the electric motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative labor.

[0039] Figure 1 is a flow chart of the electric motorcycle battery protection method provided by the present application;

[0040] Figure 2 is an exemplary flow chart for determining the charge status of each battery pack in an electric motorcycle according to the present application;

[0041] Figure 3 This is a module structure diagram of an electric motorcycle battery protection system provided in accordance with the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] The present application provides an electric motorcycle battery protection system and method. The core of the system is to monitor the charging information of each battery pack in the electric motorcycle during battery charging, obtain the charging balance characteristics of the single battery in the electric motorcycle in the active balancing mode and the energy loss characteristics of the single battery in the passive balancing 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 balancing mode based on the characteristic differences between the various charging states 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 balancing mode based on the various aging loss characteristics and the energy loss characteristics; determine the charge state balance degree of the electric motorcycle under dual-mode balancing based on the balance replenishment amount and the state balance characteristics, and balance the charging protection strategy of the electric motorcycle based on the charge state balance degree. The above scheme can achieve balanced charge adjustment of each battery pack in the charging process of the electric motorcycle, thereby improving the safety and balance of electric motorcycle charging.

[0044] Example 1: In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to 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. The battery protection method includes the following steps:

[0045] 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 balancing mode and the energy loss characteristics in the passive balancing mode.

[0046] 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 the electric motorcycle, first, the charging information of each battery pack in the electric motorcycle can be monitored 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 the 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 balance characteristics of the single cell in the active balancing mode are obtained, mainly by adjusting the voltage differences of the single cells through active balancing devices such as DC-DC converters, so as to balance the energy between batteries during the charging process. In the active balancing mode, the battery management system will monitor the battery voltage and current according to the real-time monitoring. The system automatically adjusts the charging rate of each battery cell to optimize the charging process of the battery pack and ensures that each battery cell remains in a balanced state. The set of difference values ​​between the voltage and current in each battery cell can be used as the charging balance characteristic of the single battery in the electric motorcycle in the active balancing mode. In the passive balancing mode, the energy loss characteristic is monitored by the battery management system, such as the heat generated by the resistance during the charging process. The passive balancing mode can convert the overcharged battery power into heat and release it through the resistive load, thereby balancing the voltage difference within the battery pack. The average value of the heat converted and released by each battery cell can be used as the energy loss value of the corresponding battery cell, and the set of all energy loss values ​​can be used as the energy loss characteristic in the passive balancing mode. In 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 cell, 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.

[0047] 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 based on the characteristic differences between the various charging states and the charging balance characteristics.

[0048] 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 an electric motorcycle according to an embodiment of the present application. In this embodiment, extracting the charging status of each battery pack in the electric motorcycle from each charging information can be specifically implemented by the following steps:

[0049] 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;

[0050] 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, thereby obtaining the charging state of each battery pack in the electric motorcycle.

[0051] 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 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.

[0052] In this embodiment, the following steps can be used to determine the state balance characteristics of the single battery in the active balancing mode of the electric motorcycle based on the characteristic differences between the various charging states and the charging balance characteristics:

[0053] For each battery pack in the electric motorcycle, extracting a charge balance value of the battery pack from the charge balance characteristic;

[0054] Extracting a state difference value of the battery pack from the feature differences between various charging states;

[0055] determining a charge balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charge balance value and the state difference value, thereby obtaining a charge balance degree of each battery pack of the electric motorcycle in the active balancing mode;

[0056] 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.

[0057] It should be noted that in this 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 between the voltage and current in the battery pack is obtained from the charge balance characteristic as the charge balance value of the battery pack. The charge balance value reflects the balance state of energy distribution in the battery pack during the charging process. Secondly, the cosine similarity between each charge state can be used as the characteristic difference between each battery pack. 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. 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 charge balance value and the state difference value can be used as the charge balance degree of the battery pack of the electric motorcycle in the active balancing mode. The charge balance degree of the battery pack of the electric motorcycle in the active balancing mode can be obtained by the above method. The charge balance degree is a parameter that measures the balance between the battery cells in the entire battery pack. A higher charge balance degree means that the charge 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 battery life. Finally, the standard deviation of all charge balance degrees can be used as the state balance feature of the single cell of the electric motorcycle in the active balancing mode.

[0058] In step S3, health status information of the single battery in the electric motorcycle is obtained, and then aging loss characteristics of each battery pack in the electric motorcycle are extracted from the health status information. The balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode is determined based on each aging loss characteristic and the energy loss characteristics.

[0059] It should be noted that, in the present application, the health status information represents information on changes in the electrical energy storage capacity of a single battery in an electric motorcycle; in specific implementation, the electrical energy storage capacity of a single battery in 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 electrical energy storage capacities can be used as the health status information of the single battery in the electric motorcycle.

[0060] In this embodiment, the following steps may be used to extract the aging loss characteristics of each battery pack in the electric motorcycle from the health status information:

[0061] For each battery pack in the electric motorcycle, obtaining the current health status of the battery pack from the health status information;

[0062] extracting an aging curve of the battery pack from the health status information;

[0063] The aging loss characteristics of the battery pack are determined by using the current health state and the aging curve, thereby obtaining the aging loss characteristics of each battery pack in the electric motorcycle.

[0064] 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 current energy storage capacity in the health status information can be used as the current health status of the battery pack; then, all the 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.

[0065] 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 characteristic and the energy loss characteristic can be achieved by using the following steps:

[0066] 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;

[0067] 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, thereby obtaining the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode.

[0068] In 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. Through the above method, the balance supplement amount of each battery pack in the electric motorcycle in the passive balancing mode can be obtained.

[0069] It should be noted that the balancing replenishment amount represents the amount of energy required to ensure voltage balance in the battery pack under passive balancing mode. The energy loss value represents the energy loss released by the battery to balance the charge balance between battery packs during the charge and discharge process under passive balancing mode. The electrical model is constructed based on the principle of energy conservation and aims to analyze the energy transfer and loss of the battery pack during the charge and discharge process. In this electrical model, the energy loss value, as an input variable of the electrical model, reflects the energy loss caused by factors such as internal resistance and temperature changes during the charging process. The aging loss characteristic of the battery pack, as another input variable of the electrical model, represents the capacity decay characteristic that reflects the impact of battery aging on energy efficiency during use. Based on the internal resistance loss and aging loss characteristics, the electrical model calculates the energy flow and loss of the battery pack under passive balancing mode using the principle of energy conservation. It then estimates the balancing compensation required due to voltage differences between battery packs under active balancing mode. This electrical model can accurately and quantitatively analyze the compensation amount, thereby providing the necessary energy replenishment strategy for the battery pack charging process under passive balancing mode and optimizing the battery pack's charge balance.

[0070] In step S4, the state of charge balance degree of the electric motorcycle under dual-mode balance is determined by the balance replenishment amount and the state balance characteristic, and the charging protection strategy of the electric motorcycle is balanced and adjusted based on the state of charge balance degree.

[0071] 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.

[0072] 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, a charging balance threshold of the electric motorcycle can be preset based on 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.

[0073] It can be seen that in this application, first, 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 balancing, 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 battery pack voltage balance can be accurately determined by evaluating and calculating the balancing replenishment amount, thereby balancing the voltage differences between each battery cell. In passive balancing mode, the balancing replenishment amount is carried out by adjusting the external circuit or using an energy recovery mechanism, which helps to accurately restore the balanced state of the battery pack and effectively avoid excessive loss or premature aging of single cells due to long-term imbalance, making it easier 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 charging, effectively extending the battery life, and improving the safety and balance of the overall charging of the electric motorcycle.

[0074] In summary, the technical solution adopted in the present application can achieve balanced regulation of the state of charge of each battery pack during the charging process of the electric motorcycle, thereby improving the safety and balance of the charging of the electric motorcycle.

[0075] In the second embodiment, the present application provides an electric motorcycle battery protection system, referring to Figure 3 As shown in FIG. 1 , this figure is a schematic diagram of an electric motorcycle battery protection system according to this embodiment of the present application, wherein the battery protection system includes:

[0076] The monitoring and acquisition 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 balancing mode and the energy loss characteristics in the passive balancing mode;

[0077] The active balancing module 200 is configured to extract the charge status of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery in the electric motorcycle in the active balancing mode based on the characteristic differences between the various charge statuses and the charge balancing characteristics;

[0078] The passive balancing module 300 is configured to obtain health status information of the single battery cells in the electric motorcycle, extract aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determine a balancing replenishment amount for each battery pack in the electric motorcycle in a passive balancing mode based on the aging loss characteristics and the energy loss characteristics.

[0079] The balancing adjustment module 400 is configured to determine the state of charge balance of the electric motorcycle under dual-mode balancing based on the balancing replenishment amount and the state balance characteristic, and to perform balancing adjustment on the charging protection strategy of the electric motorcycle based on the state of charge balance.

[0080] 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 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 produce 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.

[0081] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program. The program can be stored in a computer-readable 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 read-only memory (CD-ROM), or other optical disc storage, magnetic disk storage, or magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0082] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

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 balancing mode and the energy loss characteristics in the passive balancing mode; Extracting the charging status 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 based on the characteristic differences between the various charging statuses and the charging balancing characteristics; Obtaining health status information of single batteries in the electric motorcycle, extracting aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determining a balancing replenishment amount for each battery pack in the electric motorcycle in a passive balancing mode based on the aging loss characteristics and the energy loss characteristics; Determining a state of charge balance degree of the electric motorcycle under dual-mode balancing by using the balance replenishment amount and the state balance characteristic, and performing a balance adjustment on a charging protection strategy of the electric motorcycle based on the state of charge balance degree; Determining the state balance characteristics of a single battery in the active balancing mode of the electric motorcycle based on 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 a charge balance degree of the battery pack of the electric motorcycle in the active balancing mode according to the charge balance value and the state difference value, thereby obtaining a charge balance degree of each battery pack of the electric motorcycle in the active balancing mode; Determine the state balance characteristics of the single battery in the active balancing mode of the electric motorcycle through all the charge balancing degrees; Wherein, 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.

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 according to the charge amount, the charging rate and the temperature characteristic, thereby obtaining the charging state of each battery pack in the electric motorcycle.

4. 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 using the current health state and the aging curve, thereby obtaining the aging loss characteristics of each battery pack in the electric motorcycle.

5. 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 characteristic 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, thereby obtaining the balancing replenishment amount of each battery pack in the electric motorcycle in the passive balancing mode.

6. 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.

7. 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 of the single cells in the battery pack.

8. An electric motorcycle battery protection system, used to execute an electric motorcycle battery protection method according to any one of claims 1 to 7, characterized in that: The battery protection system includes: 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 balancing mode and the energy loss characteristics in the passive balancing mode; An active balancing module is used to extract the charging status of each battery pack in the electric motorcycle from each charging information, and then determine the state balancing characteristics of the single battery in the electric motorcycle in the active balancing mode based on the characteristic differences between the various charging statuses and the charging balancing characteristics; a passive balancing module for obtaining health status information of single batteries in the electric motorcycle, extracting aging loss characteristics of each battery pack in the electric motorcycle from the health status information, and determining a balancing replenishment amount for each battery pack in the electric motorcycle in a passive balancing mode based on the aging loss characteristics and the energy loss characteristics; The balancing adjustment module is used to determine the charge state balance degree of the electric motorcycle under dual-mode balance based on the balance replenishment amount and the state balance characteristic, and to perform balance adjustment on the charging protection strategy of the electric motorcycle based on the charge state balance degree.

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