Battery management method, charging management device and computer program product

Abstract

The invention provides a battery management method for a vehicle. The vehicle comprises a power battery. The battery management method comprises the following steps: a setting step S10, setting an electric quantity cut-off condition which is used for controlling charging and discharging operation of a power battery according to electric quantity limitation; an identification step S20, identifying the demand type of the vehicle for the power battery; and an application step S30, responding to the identified electric quantity demand, and applying an electric quantity cut-off condition to the power battery. The invention also relates to a corresponding charging management device and a computer program product. According to the application, aiming at the electric quantity demand of the vehicle, the charging and discharging operation of the power battery can be controlled according to the electric quantity limitation by utilizing the electric quantity cut-off condition. Therefore, the consistency of products of the same model can be improved, the appearance of battery aging on the endurance mileage can be delayed, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular, to a battery management method, a charging management device, and a computer program product. Background Art

[0002] The charge and discharge control strategy of electric vehicles has a direct impact on vehicle performance and user experience. At present, electric vehicles mainly use voltage or state of charge (SOC) as the cut-off condition to control the charge and discharge operations of their power batteries. Specifically, the battery management system (BMS) can monitor the voltage or SOC of the power battery in real time and generate a charge and discharge termination instruction when the cut-off voltage or cut-off SOC is reached. However, there are some problems in the existing control methods in practical applications.

[0003] Taking lithium-ion batteries as an example, in actual production, due to reasons such as material batches and manufacturing precision, even batteries of the same model will have differences from each other. This makes the actual available capacities of the power batteries also different. Conventional control strategies are only based on voltage or SOC and cannot accurately reflect the true power state of the power battery. This may cause power waste or estimation errors in the cruising range.

[0004] In addition, under the existing control strategy, the BMS imposes strict restrictions on the power input or power output of the power battery at high SOC or low SOC to avoid overcharging or over-discharging of the power battery. This results in the problem of limited power at the end of the power battery, which in turn leads to poor user experience.

[0005] Therefore, the existing technology has deficiencies in the charge and discharge management of the power batteries of vehicles. Summary of the Invention

[0006] The purpose of the present application is to provide an improved battery management method, a corresponding computer program product, and a charging management device to overcome at least one of the deficiencies in the existing technology.

[0007] According to a first aspect of the present application, there is provided a battery management method for a vehicle, the vehicle including a power battery. The battery management method includes the following steps: a setting step S10 of setting a power cut-off condition for controlling the charge and discharge operations of the power battery according to power limitations; an identifying step S20 of identifying the type of demand for the power battery by the vehicle; and an applying step S30 of applying the power cut-off condition to the power battery in response to the identified power demand.

[0008] In practice, although the same model of power batteries have consistent rated capacities, their actual maximum capacities usually differ. This inconsistency causes differences in the range between different vehicles of the same model equipped with the same model of power batteries. Conventional charge and discharge control strategies only control the charge and discharge operations of the power battery based on voltage or SOC, which cannot accurately reflect the true state of charge of the power battery. This may lead to a poor user experience. For example, when estimating the vehicle's range, misjudgments may occur due to this inconsistency. Alternatively, this inconsistency may cause users to distrust the performance or quality of the vehicle or its power battery. In addition, the vehicle's driving performance may be poor due to limited terminal power of the power battery.

[0009] According to the present application, the charge and discharge operation of the power battery can be controlled according to the power limit by using the power cut-off condition in response to the power demand of the vehicle. The same vehicle model and / or the same type of power battery can adopt a unified power limit. Thus, the consistency of products of the same model can be improved. This helps to eliminate the inconvenience caused by capacity differences during vehicle use and improve the user experience.

[0010] In addition, as time goes by, the power battery will age. When the voltage or SOC is used as the cutoff condition to control the charging and discharging of the power battery, this aging will be reflected in the shortening of the cruising range in the early stage. In contrast, according to the present application, the manifestation of battery aging in the cruising range can be delayed.

[0011] The battery management method according to the present application can also avoid the problem of low overall utilization due to the inconsistency of the power battery cells, and achieve higher control accuracy. For example, when the charge and discharge are controlled according to the cut-off voltage, the entire battery pack may be forced to stop charging and discharging because the voltage of individual cells reaches the cut-off voltage. For another example, when the charge and discharge are controlled according to the SOC, since the SOC is usually estimated by other parameters (such as voltage), considering factors such as battery aging or temperature changes, the problem of inaccurate SOC estimation may occur. By directly controlling the charge and discharge operation according to the power limit, the actual charge and discharge depth of the power battery can be accurately controlled to avoid overcharging or over-discharging due to SOC estimation deviations.

[0012] According to an exemplary embodiment of the present application, by identifying the type of demand the vehicle places on the power battery, and applying a power cutoff condition to the power battery in response to the identified power demand, the power cutoff condition can be applied in a targeted manner, which is particularly helpful in avoiding the problem of terminal power limitation.

[0013] In an exemplary embodiment, the power cut-off condition includes a charging power cut-off condition, which indicates controlling the charging operation of the power battery according to the charging power of the power battery and the designed maximum power. In this way, different vehicles of the same model can be charged with the same amount of power. This helps to ensure that different vehicles of the same model have a consistent cruising range.

[0014] Optionally, when the charging power of the power battery reaches E / n, the charging operation is prohibited, where E represents the designed maximum power of the power battery and n represents the charge-discharge efficiency of the power battery. Thus, it can be further ensured that different vehicles of the same model have a consistent cruising range.

[0015] Optionally, the power cut-off condition includes a discharging power cut-off condition, which indicates controlling the charging operation of the power battery according to the discharging power of the power battery and the designed maximum power. Optionally, when the discharging power of the power battery reaches E, the discharging operation is prohibited, where E represents the designed maximum power of the power battery. Thus, it can be ensured that different vehicles of the same model have a consistent cruising range.

[0016] In an exemplary embodiment, the charging power cut-off condition may include: when the charging power of the power battery reaches the corrected charging power E1, the charging operation is prohibited, where E1 = f(SOH, E / n), SOH represents the state of health of the power battery, E represents the designed maximum power of the power battery, and n represents the charge-discharge efficiency of the power battery. Thus, the power limit can be corrected according to the state of health of the battery.

[0017] In an exemplary embodiment, the discharging power cut-off condition may include: when the discharging power of the power battery reaches the corrected discharging power E2, the discharging operation is prohibited, where E2 = f(SOH, E), SOH represents the state of health of the power battery, and E represents the designed maximum power of the power battery.

[0018] In an exemplary embodiment, if at least one of the following situations is recognized, it is determined that the demand type is a power demand: the vehicle is in a charging state when it is not in a driving state; the vehicle is in a driving state with a power demand lower than a predetermined power threshold.

[0019] In an exemplary embodiment, in the setting step S10, a voltage control condition is also set, which is used to control the charge-discharge operation of the power battery according to the voltage limit. In the application step S30, the voltage control condition or the power cut-off condition is applied according to the demand type, where, in response to the power demand, the voltage control condition is applied to the power battery.

[0020] In an exemplary embodiment, the voltage control conditions include: a charging voltage control condition, which indicates controlling the recovery power of the power battery according to the voltage of the power battery and the upper voltage limit value; and / or a discharging voltage control condition, which indicates controlling the discharging power of the power battery according to the voltage of the power battery and the lower voltage limit value. Thereby, while improving the consistency of the power battery, the terminal power can be fully released.

[0021] In an exemplary embodiment, the upper voltage limit value is greater than the maximum voltage that the power battery can reach according to the power limit. Alternatively or additionally, the lower voltage limit value is less than the minimum voltage that the power battery can reach according to the power limit. This helps to fully release the terminal power.

[0022] In an exemplary embodiment, if at least one of the following situations is recognized, it is determined that the demand type is a power demand: the vehicle is in a power recovery state; the vehicle is in an accelerating state where the power demand exceeds a predetermined power threshold; the vehicle is in an uphill state where the power demand exceeds a predetermined power threshold.

[0023] According to a second aspect of the present application, there is provided a computer program product, which includes computer program instructions, wherein when the computer program instructions are executed by one or more processors, the one or more processors are enabled to execute the battery management method according to the present application.

[0024] According to a third aspect of the present application, there is provided a charging management device for a vehicle, wherein the charging management device includes a memory and a processor, the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the processor is enabled to execute the battery management method according to the present application. Description of the Drawings

[0025] Next, the present application will be described in more detail by referring to the drawings, and the principles, features, and advantages of the present application can be better understood. The drawings include:

[0026] Figure 1 Schematically showing a flowchart of a battery management method for a vehicle according to an exemplary embodiment of the present application;

[0027] Figure 2 Schematically showing a flowchart of a setting step of the battery management method according to an exemplary embodiment of the present application;

[0028] Figure 3 Schematically showing a flowchart of an application step of the battery management method according to an exemplary embodiment of the present application;

[0029] Figure 4 Schematically showing a vehicle according to an exemplary embodiment of the present application; and

[0030] Figure 5 Schematically shows a charging management device according to an exemplary embodiment of the present application.

[0031] List of reference numerals

[0032] 10 Vehicle

[0033] 11 Power battery

[0034] 12 Charging management device

[0035] 121 Setting module

[0036] 122 Identification module

[0037] 123 Application module

[0038] 13 Detection device Detailed implementation manners

[0039] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the protection scope of the present application.

[0040] Figure 1 Schematically shows a flowchart of a battery management method for a vehicle according to an exemplary embodiment of the present application. The vehicle includes a power battery, which can provide a driving force for driving the vehicle. The power battery is particularly a lithium-ion battery, such as a ternary lithium-ion battery. In other embodiments, the power battery may also include other types of batteries.

[0041] As Figure 1 shown, the battery management method may include a setting step S10, an identification step S20, and an application step S30.

[0042] In the setting step S10, a power cut-off condition is set, which is used to control the charging and discharging operations of the power battery according to the power limit. The power cut-off condition may include, for example: when the preset power limit is reached, the charging operation or discharging operation of the power battery is stopped or prohibited. Here, the power may include the charging power and / or the discharging power. The charging power and / or the discharging power can be measured and integrated in real time by a current sensor.

[0043] In the identification step S20, the type of demand of the vehicle for the power battery is identified.

[0044] In the application step S30, in response to identifying a power demand, the power cut-off condition is applied to the power battery.

[0045] In practice, although power batteries of the same model have a consistent rated capacity, their actual maximum capacities usually vary. This inconsistency causes differences in the cruising range among different vehicles of the same model equipped with power batteries of the same model. This may lead to poor user experiences. For example, when estimating the cruising range of a vehicle, users may make misjudgments due to this inconsistency. Or, this inconsistency may cause users to lose trust in the performance or quality of the vehicle or its power battery.

[0046] According to the present application, for the power demand of a vehicle, the charging and discharging operations of the power battery can be controlled according to a power cutoff condition and a power limit. This helps to eliminate the inconveniences during vehicle use caused by capacity differences and improve the user experience.

[0047] For example, the first vehicle, the second vehicle, and the third vehicle of a certain model are uniformly equipped with power batteries with a rated capacity of 100 kWh. However, the actual maximum capacities of the power batteries of the first vehicle, the second vehicle, and the third vehicle may be 100 kWh, 105 kWh, and 108 kWh respectively. If the voltage or SOC is used as the cutoff condition to control the charging and discharging of the power battery, the first vehicle, the second vehicle, and the third vehicle will show inconsistent cruising ranges.

[0048] In contrast, according to the present application, by adopting a unified power limit, the first vehicle, the second vehicle, and the third vehicle can have equal cruising ranges. As an example, the maximum charging power E C and the maximum discharging power E D can be set. The maximum charging power E C and the maximum discharging power E D can be set to 95 kWh for example. If the charging power of the power battery reaches the maximum charging power E C , the charging stops. If the discharging power of the power battery reaches the maximum discharging power E D , the discharging stops. For the first vehicle, the second vehicle, and the third vehicle, the charging and discharging of their power batteries are controlled according to the unified maximum charging power E C and the maximum discharging power E D . Thereby, the consistency of products of the same model can be improved.

[0049] Over time, the power battery will age. When controlling the charging and discharging of the power battery with voltage or SOC as the cut-off condition, this aging will be manifested in the shortening of the cruising range at the initial stage. In contrast, according to the present application, the manifestation of battery aging in the cruising range can be delayed. For example, for the power battery of the above-mentioned third vehicle, its actual maximum capacity at the initial stage of life is 108 kWh. As the battery ages, the maximum capacity of the power battery of the third vehicle decreases. The maximum charge amount E C and the maximum discharge amount E D can remain unchanged. Before the maximum capacity of the power battery of the third vehicle decays to 100 kWh, the cruising range of the third vehicle can remain unchanged. Thus, while improving the consistency of the vehicle and / or the power battery, its performance stability can also be improved.

[0050] In addition, the battery management method according to the present application can also avoid the problem of low overall utilization rate caused by the inconsistency of the battery cells of the power battery. For example, when controlling charging and discharging according to the cut-off voltage, it may occur that the entire battery pack is forced to stop charging and discharging because the voltage of individual battery cells reaches the cut-off voltage.

[0051] The battery management method according to the present application can also achieve higher control accuracy. For example, when controlling charging and discharging according to SOC, since SOC is usually estimated by other parameters (such as voltage), considering factors such as battery aging or temperature change, there may be a problem of inaccurate SOC estimation. By directly controlling the charging and discharging operations according to the power limit, the actual charging and discharging depth of the power battery can be accurately controlled, avoiding overcharging or over-discharging caused by SOC estimation deviation.

[0052] According to an exemplary embodiment of the present application, by identifying the type of demand of the vehicle for the power battery and applying the power cut-off condition to the power battery in response to the identified power demand, the power cut-off condition can be applied in a targeted manner, which is particularly helpful for avoiding the problem of limited end power.

[0053] Under the existing control method, the BMS imposes strict restrictions on the power input or power output of the power battery at high SOC or low SOC to avoid overcharging or over-discharging of the power battery. However, this restriction directly leads to limited end power of the power battery, and then leads to poor user experience. For example, at high SOC, the power recovery power of the vehicle is greatly restricted, and the regenerative braking function cannot be fully utilized when the vehicle decelerates, resulting in a decrease in power recovery efficiency and a decline in driving smoothness. At low SOC, the output power of the power battery is restricted, and the acceleration performance of the vehicle is significantly attenuated, making the user feel that the vehicle throttle is sluggish or the acceleration is weak. Especially in climbing or overtaking scenarios, there may be potential safety hazards.

[0054] By differentiating the types of demand and applying appropriate control methods to control the charging and discharging of power batteries in a targeted manner, it is possible to fully release the terminal power while improving the consistency of the power batteries.

[0055] The demand type may include, for example, a power demand and a power demand. In this context, the power demand may indicate a demand type where the vehicle is primarily constrained by power. The power demand may indicate a demand type where the vehicle is primarily constrained by power.

[0056] For example, if it is identified that the vehicle is in a charging state without driving, the demand type is determined to be a power demand. Alternatively or additionally, if it is identified that the vehicle is in a driving state with a power demand lower than a predetermined power threshold, the demand type is determined to be a power demand.

[0057] In an exemplary embodiment according to the present application, if it is identified that the vehicle is in a power recovery state, the demand type can be determined to be a power demand. Power recovery is the process of converting kinetic energy into electrical energy through the vehicle's motor when the vehicle is decelerating or coasting. When the vehicle is performing power recovery, it usually balances the recovery efficiency and driving comfort by adjusting the power generated by the motor. For example, when the battery is close to full charge, the recovery power can be reduced; and when rapid deceleration is required, the recovery power can be increased. These control strategies all use power as the core parameter.

[0058] Optionally, if it is identified that the vehicle is in a power recovery state and the SOC of the power battery is higher than a predetermined SOC threshold, it may be determined that the demand type is a power demand.

[0059] Alternatively or additionally, if it is recognized that the vehicle is in an accelerating driving state in which the power demand exceeds a predetermined power threshold, the demand type may be determined to be a power demand.

[0060] Furthermore, optionally, if it is identified that the vehicle is in an uphill driving state where the power demand exceeds a predetermined power threshold, the demand type may be determined to be a power demand.

[0061] According to an exemplary embodiment of the present application, in the setting step S10, a voltage control condition is also set, which is used to control the charging and discharging operation of the power battery according to the voltage limit. In the application step S30, the voltage control condition or the power cut-off condition is applied according to the demand type, wherein the voltage control condition is applied to the power battery in response to the power demand.

[0062] Figure 2 The flowchart of the setting step S10 of the battery management method according to the exemplary embodiment of the present application is schematically shown.

[0063] In this embodiment, the setting step S10 includes steps S101 and S102.

[0064] In step S101 , a power cut-off condition is set, which is used to control the charging and discharging operation of the power battery according to the power limit.

[0065] The power cut-off condition may include, for example, a charging power cut-off condition, which indicates that the charging operation of the power battery is controlled according to the charging power of the power battery and the designed maximum power. For example, when the charging power of the power battery reaches the designed maximum power, the charging operation is prohibited. The designed maximum power may be determined according to the rated capacity of the power battery.

[0066] This allows different vehicles of the same model to be charged with the same amount of electricity. This helps ensure that different vehicles of the same model have a consistent range.

[0067] Parameters related to the power limit may be predetermined and stored. Setting the power cut-off condition may include reading the related parameters. Setting the power cut-off condition may also include obtaining information indicating the real-time status of the vehicle and / or the surrounding environment and adjusting or determining the power limit based on the information.

[0068] Optionally, when the charging capacity of the power battery reaches E / n, charging is prohibited, where E represents the designed maximum capacity of the power battery and n represents the charging and discharging efficiency of the power battery. This can further ensure that different vehicles of the same model have consistent cruising range.

[0069] The charge and discharge efficiency n represents the percentage of discharge energy to charge energy. The charge and discharge efficiency n can be pre-calibrated and stored, for example. The charge and discharge efficiency n can be set in particular according to the personalized performance parameters of the vehicle and its power battery. Optionally, the historical operating data of the power battery can be recorded, and the charge and discharge efficiency n of the power battery can be determined or adjusted based on the historical operating data. For example, the charge and discharge efficiency n of the power battery can be related to the historical operating data of the power battery in the recent period of time (for example, 1 day or 1 month, etc.). In this way, more accurate charge and discharge control can be achieved.

[0070] Alternatively or additionally, the power cut-off condition may include, for example, a discharge power cut-off condition, which indicates that the charging operation of the power battery is controlled according to the discharge power of the power battery and the designed maximum power. Optionally, the discharge operation is prohibited when the discharge power of the power battery reaches E, where E represents the designed maximum power of the power battery. In this way, it can be ensured that different vehicles of the same model have a consistent range.

[0071] In an exemplary embodiment according to the present application, a compensation coefficient for power limitation may be determined according to the operating temperature of the power battery.

[0072] The compensation coefficient can be determined in particular according to the integral of the operating temperature of the power battery. The integral of the operating temperature can be expressed as: ∫Tdt, for example.

[0073] Optionally, the integral of the square value of the difference between the operating temperature of the power battery and the reference temperature may be determined, and the compensation coefficient may be determined based on the integral of the square value.

[0074] In one embodiment, the compensation coefficient k can be determined according to the following formula: k=1-α∫(TT 0 ) 2 dt, where k represents the compensation coefficient, α represents the temperature coefficient, T represents the operating temperature of the power battery, and T0 represents the reference temperature. The reference temperature can be set to 25°C, for example. The operating temperature T can be measured by a temperature sensor. The temperature coefficient α can be pre-calibrated by experiment.

[0075] The compensation coefficient can be used to adjust the power limit of the power cut-off condition. Take the discharge power cut-off condition as an example. Without considering the compensation coefficient, if the discharge power of the power battery reaches E, the discharge operation is prohibited. With the compensation coefficient considered, if the discharge power of the power battery reaches k*E, the discharge operation is prohibited.

[0076] According to an exemplary embodiment of the present application, the charging power cut-off condition may indicate that the charging operation is prohibited when the charging power of the power battery reaches the corrected charging power E1. Here, E1=f(SOH, E / n), SOH represents the battery health state of the power battery, E represents the designed maximum power of the power battery, and n represents the charging and discharging efficiency of the power battery. The battery health state may indicate the degree of attenuation of the maximum capacity of the power battery relative to the rated capacity.

[0077] Thus, the power limit can be modified according to the battery health state. When the battery health state decreases, the modified charging power E1 also decreases.

[0078] For example, the corrected charging capacity E1 may be calculated according to E1 = SOH*E / n. In addition, the corrected charging capacity E1 may be determined according to SOH and the designed maximum capacity E in other ways, such as by looking up a table.

[0079] Similarly, the discharge capacity cut-off condition may indicate that the discharge operation is prohibited when the discharge capacity of the power battery reaches the modified discharge capacity E2. Here, E2 = f(SOH, E), SOH represents the battery health state of the power battery, and E represents the designed maximum capacity of the power battery. When the battery health state decreases, the modified discharge capacity E2 also decreases.

[0080] For example, the corrected discharge capacity E2 may be calculated according to E2 = SOH*E. In addition, the corrected charge capacity E2 may be determined according to SOH and the designed maximum capacity E in other ways, such as by looking up a table.

[0081] In step S102 , a voltage control condition may be set, which is used to control the charging and discharging operation of the power battery according to the voltage limit.

[0082] The voltage control condition may include a charging voltage control condition, which indicates controlling the recovery power of the power battery according to the voltage of the power battery and the voltage upper limit value.

[0083] Alternatively or additionally, the voltage control condition may include a discharge voltage control condition, which indicates that the discharge power of the power battery is controlled according to the voltage of the power battery and a voltage lower limit value.

[0084] According to an exemplary embodiment of the present application, the voltage upper limit value and / or the voltage lower limit value may be set independently of the rated parameters of the power battery. Instead, the voltage upper limit value and / or the voltage lower limit value may be set according to the personalized performance parameters of the power battery itself.

[0085] Optionally, the upper voltage limit is greater than the maximum voltage that the power battery can reach according to the power limit. Alternatively or additionally, the lower voltage limit is less than the lowest voltage that the power battery can reach according to the power limit. This helps to fully release the terminal power.

[0086] Figure 3 The flowchart of the application step S30 of the battery management method according to the exemplary embodiment of the present application is schematically shown.

[0087] In this embodiment, the application step S30 includes steps S301 and S302.

[0088] In step S301 , in response to a power demand, a power cutoff condition is applied to the power battery.

[0089] In step S302 , in response to the power demand, a voltage control condition is applied to the power battery.

[0090] For example, when the vehicle is in a power recovery state, the power demand of the vehicle can be identified. Accordingly, voltage control conditions can be applied to the power battery. Specifically, the recovery power of the power battery can be controlled according to the voltage and the voltage upper limit of the power battery. The upper and lower voltage values ​​can be set higher to fully release the terminal power of the power battery. Therefore, under high SOC, the charging cutoff point can be accurately controlled according to the preset charging power cutoff condition, while allowing a high recovery power to be maintained within a reasonable range, ensuring that users can still get a stable energy recovery experience when decelerating or braking.

[0091] Optionally, if it is identified that the vehicle is in a power recovery state and the SOC of the power battery is higher than a predetermined SOC threshold, it may be determined that the demand type is a power demand.

[0092] When describing exemplary embodiments herein, the method and / or process may be presented as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be appreciated by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0093] Figure 4 A vehicle 10 according to an exemplary embodiment of the present application is schematically illustrated.

[0094] The vehicle 10 includes a power battery 11. The power battery 11 may be a lithium-ion battery.

[0095] The vehicle 10 may further include a charging management device 12. The charging management device 12 may be configured to perform a battery management method according to an exemplary embodiment of the present application. It should be understood that the features and advantages described herein for the battery management method are also applicable to the charging management device 12, and vice versa.

[0096] The charging management device 12 may be implemented as, for example, a control unit dedicated to controlling the charging operation of the power battery 11 .

[0097] The charging management device 12 of the vehicle 10 may include a memory and a processor, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the processor can, for example, execute a battery management method for the vehicle 10. The memory of the charging management device 12 may also store parameters for setting a power cutoff condition and / or a voltage control condition, for example.

[0098] The computer program product may be stored in a computer-readable storage medium. The computer-readable storage medium may include, for example, a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. The processor may be a central processing unit, or may be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0099] like Figure 4As shown, the vehicle 10 further includes at least one detection device 13. The detection device 13 may be configured to detect the status of various components of the vehicle 10 and / or the status of the external environment, etc.

[0100] The detection device 13 may include, for example, a sensor for detecting parameters such as current and / or voltage of the power battery, etc. The detection device 13 may also include a temperature sensor for detecting the operating temperature of the power battery 11 .

[0101] Figure 5 A charging management device according to an exemplary embodiment of the present application is schematically shown.

[0102] The charging management device may include a setting module 121 , an identification module 122 , and an application module 123 .

[0103] The setting module 121 is configured to set a power cut-off condition, which is used to control the charge and discharge operation of the power battery according to the power limit. Optionally, the setting module 121 can also be configured to set a voltage control condition, which is used to control the charge and discharge operation of the power battery according to the voltage limit.

[0104] The identification module 122 is configured to be able to identify the type of demand that the vehicle places on the power battery.

[0105] The application module 123 is configured to apply a power cut-off condition to the power battery in response to identifying a power demand.

[0106] Optionally, the application module 123 can be configured to apply voltage control conditions or power cutoff conditions according to the demand type, wherein, in response to identifying the power demand, the power cutoff condition is applied to the power battery; in response to the power demand, the voltage control condition is applied to the power battery.

[0107] Although the specific embodiments of the present application are described in detail herein, they are provided for the purpose of explanation only and should not be considered to limit the scope of the present application. Various substitutions, changes and modifications may be conceived without departing from the spirit and scope of the present application.

Claims

1. A battery management method for a vehicle, the vehicle comprising a power battery, wherein: The battery management method comprises the following steps: Setting step S10, setting a power cut-off condition, which is used to control the charging and discharging operation of the power battery according to the power limit; Identification step S20, identifying the type of power battery demanded by the vehicle; and In the application step S30 , in response to identifying the power demand, a power cutoff condition is applied to the power battery.

2. The battery management method according to claim 1, wherein: The power cut-off conditions include: a charging capacity cut-off condition, which indicates that the charging operation of the power battery is controlled according to the charging capacity of the power battery and the designed maximum capacity, wherein the charging operation is optionally prohibited when the charging capacity of the power battery reaches E / n, where E represents the designed maximum capacity of the power battery and n represents the charging and discharging efficiency of the power battery; and / or The discharge capacity cut-off condition indicates that the charging operation of the power battery is controlled according to the discharge capacity of the power battery and the designed maximum capacity, wherein the discharge operation is optionally prohibited when the discharge capacity of the power battery reaches E, and E represents the designed maximum capacity of the power battery.

3. The battery management method according to claim 1, wherein: The power cut-off conditions include: a charging capacity cut-off condition, which indicates that the charging operation of the power battery is controlled according to the charging capacity of the power battery and the designed maximum capacity, wherein the charging operation is optionally prohibited when the charging capacity of the power battery reaches a corrected charging capacity E1, E1=f(SOH,E / n), SOH represents the battery health state of the power battery, E represents the designed maximum capacity of the power battery, and n represents the charge and discharge efficiency of the power battery; and / or The discharge capacity cut-off condition indicates that the charging operation of the power battery is controlled according to the discharge capacity of the power battery and the designed maximum capacity, wherein the discharge operation is prohibited when the discharge capacity of the power battery reaches the corrected discharge capacity E2, E2 = f(SOH, E), SOH represents the battery health state of the power battery, and E represents the designed maximum capacity of the power battery.

4. The battery management method according to any one of claims 1 to 3, wherein: If at least one of the following situations is identified, the demand type is determined to be power demand: The charging status of the vehicle when it is not in motion; The vehicle is in a driving state where the power demand is below a predetermined power threshold.

5. The battery management method according to any one of claims 1 to 4, wherein: In the setting step S10, a voltage control condition is also set, which is used to control the charging and discharging operation of the power battery according to the voltage limit; In the applying step S30 , a voltage control condition or a power cut-off condition is applied according to the demand type, wherein the voltage control condition is applied to the power battery in response to the power demand.

6. The battery management method according to claim 5, wherein: Voltage control conditions include: a charging voltage control condition, which indicates controlling the recovery power of the power battery according to the voltage of the power battery and the voltage upper limit value; and / or The discharge voltage control condition indicates that the discharge power of the power battery is controlled according to the voltage of the power battery and the voltage lower limit.

7. The battery management method according to claim 5 or 6, wherein: The voltage upper limit is greater than the maximum voltage that the power battery can reach according to the power limit; and / or The voltage lower limit is less than the lowest voltage that the power battery can reach according to the power limit.

8. The battery management method according to any one of claims 5 to 7, wherein: If at least one of the following situations is identified, the demand type is determined to be a power demand: The vehicle is in power recovery mode; The vehicle is in an accelerated driving state where the power demand exceeds a predetermined power threshold; The vehicle is in an uphill driving state where the power demand exceeds a predetermined power threshold.

9. A computer program product comprising computer program instructions, wherein: The computer program instructions, when executed by one or more processors, enable the one or more processors to perform the battery management method according to any one of claims 1-8.

10. A charging management device for a vehicle, wherein: The charging management device comprises a memory and a processor, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the processor is capable of executing the battery management method according to any one of claims 1-8.

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