Discharge power control method and device of battery, management device, vehicle and medium

Abstract

The application provides a battery discharge power control method and device, a management equipment, a vehicle and a medium. The control method comprises the following steps: in the process of discharging the battery, acquiring continuous discharge powers of a plurality of first time lengths; judging whether the peak discharge power of a second time length needs to be controlled according to the change rates of the continuous discharge powers; wherein the first time length is longer than the second time length; if the peak discharge power needs to be controlled, acquiring the peak discharge power at the current moment; and controlling the peak discharge power after the current moment based on the peak discharge power at the current moment. Therefore, the method can avoid overloading of the battery and reduce the risk of battery under-voltage by introducing the continuous discharge powers of the plurality of first time lengths and jointly controlling the peak discharge power after the current moment.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a method, apparatus, management equipment, vehicle, and medium for controlling the discharge power of a battery. Background Technology

[0002] With the development of the times, new energy vehicles are becoming increasingly popular due to their environmental friendliness and low operating costs.

[0003] As the power source for new energy vehicles, the power battery provides energy to various components within the vehicle. Typically, during discharge, the power battery uses the rated continuous discharge power and peak discharge power provided by the battery supplier for each duration to control the battery's discharge power. This can lead to the rated peak discharge power exceeding the actual peak discharge power, causing the battery to be overloaded and posing a risk of undervoltage. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the first objective of this invention is to propose a method for controlling the discharge power of a battery. This method introduces multiple continuous discharge powers for a first duration and jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0006] The second objective of this invention is to provide a battery discharge power control device.

[0007] The third objective of this invention is to provide a battery management device.

[0008] The fourth objective of this invention is to provide a vehicle.

[0009] The fifth object of the present invention is to provide a computer-readable storage medium.

[0010] The sixth objective of this invention is to provide a computer program product.

[0011] To achieve the above objectives, a first aspect of the present invention provides a method for controlling the discharge power of a battery. The method includes the following steps: during battery discharge, acquiring a plurality of continuous discharge powers for a first duration; determining, based on the rate of change of the plurality of continuous discharge powers, whether it is necessary to control the peak discharge power for a second duration; wherein, the first duration is longer than the second duration; if it is necessary to control the peak discharge power, acquiring the peak discharge power at the current moment; and controlling the peak discharge power subsequent at the current moment based on the peak discharge power at the current moment.

[0012] According to an embodiment of the present invention, a battery discharge power control method acquires multiple continuous discharge powers for a first duration during battery discharge. Based on the rate of change of these multiple continuous discharge powers, it is determined whether control of the peak discharge power for a second duration is required. If control of the peak discharge power is required, the peak discharge power at the current moment is acquired, and the peak discharge power subsequent to the current moment is controlled based on the peak discharge power at the current moment. The first duration is longer than the second duration. Therefore, by introducing multiple continuous discharge powers for a first duration and jointly controlling the peak discharge power subsequent to the current moment, this method can avoid battery overload and reduce the risk of battery undervoltage.

[0013] In addition, the battery discharge power control method proposed in the first aspect embodiment of the present invention may also have the following additional technical features:

[0014] According to one embodiment of the present invention, determining whether to control the peak discharge power for a second duration based on the rate of change of a plurality of continuous discharge powers includes: calculating the difference between any two adjacent continuous discharge powers; calculating the rate of change of any two adjacent continuous discharge powers based on the difference; if the rate of change is greater than a set rate of change, determining that the peak discharge power needs to be controlled; or, if the rate of change is less than or equal to a set rate of change, determining that the peak discharge power does not need to be controlled.

[0015] According to one embodiment of the present invention, controlling the peak discharge power of subsequent times based on the peak discharge power of the current time includes: controlling the peak discharge power of the current time to decrease at a set rate, and using the decrease rate as the subsequent peak discharge power of the current time.

[0016] According to one embodiment of the present invention, before obtaining the continuous discharge power for a plurality of first durations, the method further includes: determining that the state of charge of the battery is less than or equal to a set state of charge.

[0017] According to one embodiment of the present invention, after controlling the subsequent peak discharge power at the current moment, the method further includes: controlling the actual discharge power of the battery based on the controlled subsequent peak discharge power.

[0018] According to one embodiment of the present invention, controlling the actual discharge power of the battery based on the subsequent peak discharge power after control includes: controlling the actual discharge power of the battery at each time period to be less than or equal to the subsequent peak discharge power after control at the corresponding time period.

[0019] To achieve the above objectives, a second aspect of the present invention provides a battery discharge power control device, comprising: a first acquisition module configured to acquire a plurality of continuous discharge powers for a first duration during battery discharge; a judgment module configured to determine, based on the rate of change of the plurality of continuous discharge powers, whether it is necessary to control the peak discharge power for a second duration; wherein the first duration is longer than the second duration; a second acquisition module configured to acquire the peak discharge power at the current moment when it is necessary to control the peak discharge power; and a control module configured to control the peak discharge power subsequent at the current moment based on the peak discharge power at the current moment.

[0020] According to an embodiment of the present invention, a battery discharge power control device acquires multiple continuous discharge powers of a first duration during battery discharge. A judgment module determines, based on the rate of change of these multiple continuous discharge powers, whether control of the peak discharge power of a second duration is required. The first duration is longer than the second duration. When control of the peak discharge power is required, the second acquisition module acquires the peak discharge power at the current moment, and a control module controls the peak discharge power subsequent to the current moment based on the current peak discharge power. Thus, by incorporating multiple continuous discharge powers of the first duration and jointly controlling the peak discharge power subsequent to the current moment, the device can avoid battery overload and reduce the risk of battery undervoltage.

[0021] In addition, the battery discharge power control device proposed in the second aspect embodiment of the present invention may also have the following additional technical features:

[0022] According to an embodiment of the present invention, the determining module includes: a first calculation unit configured to calculate the difference between any two adjacent continuous discharge powers; a second calculation unit configured to calculate the rate of change of any two adjacent continuous discharge powers based on the difference; and a first determining unit configured to determine that the peak discharge power needs to be controlled when the rate of change is greater than a set rate of change; or, the second determining unit configured to determine that the peak discharge power does not need to be controlled when the rate of change is less than or equal to a set rate of change.

[0023] According to one embodiment of the present invention, the control module includes: a control unit configured to control the peak discharge power at the current moment to decrease at a set rate, and to use the peak discharge power at the current moment as the subsequent peak discharge power.

[0024] According to an embodiment of the present invention, the battery discharge power control device further includes: a determining module, configured to determine that the state of charge of the battery is less than or equal to a set state of charge before acquiring a plurality of continuous discharge powers for a first duration through the first acquiring module.

[0025] According to one embodiment of the present invention, the battery discharge power control device further includes: the control module is further configured to control the actual discharge power of the battery based on the controlled subsequent peak discharge power after controlling the subsequent peak discharge power.

[0026] According to one embodiment of the present invention, when the control module is configured to control the actual discharge power of the battery based on the subsequent peak discharge power after control, the control module includes: controlling the actual discharge power of the battery for each duration to be less than or equal to the subsequent peak discharge power after control for the corresponding duration.

[0027] To achieve the above objectives, a third aspect of the present invention provides a battery management device, which includes a processor and a memory; wherein the processor reads executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the battery discharge power control method of the above embodiment.

[0028] The battery management device of this invention, by executing the battery discharge power control method of the above embodiment, introduces multiple continuous discharge powers for a first duration and jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0029] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle that includes the battery management device described above.

[0030] In the vehicle of this embodiment of the invention, the battery management device described above introduces multiple continuous discharge powers for a first duration and jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0031] To achieve the above objectives, a fifth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the battery discharge power control method of the above embodiments.

[0032] The computer-readable storage medium of this invention executes the battery discharge power control method of the above embodiments. By introducing multiple continuous discharge powers for a first duration, it jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0033] To achieve the above objectives, a sixth aspect of the present invention provides a computer program product that, when instructions in the computer program product are executed by a processor, performs the battery discharge power control method of the above embodiment.

[0034] The computer program product of this invention executes the battery discharge power control method of the above embodiment. By introducing multiple continuous discharge powers for a first duration, it jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0037] Figure 1 This is a flowchart of a battery discharge power control method according to an embodiment of the present invention;

[0038] Figure 2 This is a flowchart of a battery discharge power control method according to an embodiment of the present invention;

[0039] Figure 3 This is a flowchart of a battery discharge power control method according to a specific embodiment of the present invention.

[0040] Figure 4 This is a block diagram of a battery discharge power control device according to an embodiment of the present invention. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] The following description, with reference to the accompanying drawings, describes a battery discharge power control method, a battery discharge power control device, a battery management device, a vehicle, and a computer-readable storage medium.

[0043] Figure 1 This is a flowchart of a battery discharge power control method according to an embodiment of the present invention.

[0044] like Figure 1 As shown, the battery discharge power control method of this embodiment includes the following steps:

[0045] S101 acquires the continuous discharge power for multiple first durations during the battery discharge process.

[0046] The first duration can be 30 seconds or 60 seconds.

[0047] As a possible implementation of step S101, the continuous discharge power for multiple first durations is obtained through calculation. The specific calculation process can be as follows: Online estimation of parameters such as the battery's polarization internal resistance, DC internal resistance, and polarization capacitance, i.e., the battery's second-order RC model, is used to deduce the continuous discharge power for the first duration. For example, based on the currently estimated parameters and the cutoff voltage, the current required to immediately discharge from the current state to the cutoff voltage can be calculated. The product of the estimated current and the cutoff voltage is then the continuous discharge power of the battery for the next duration. In this way, the continuous discharge power for multiple first durations can be calculated in real time.

[0048] S102, based on the rate of change of multiple continuous discharge powers, determine whether it is necessary to control the peak discharge power of the second duration; wherein, the first duration is longer than the second duration.

[0049] The second duration can be 5 seconds or 10 seconds.

[0050] As one possible implementation of step S102, after obtaining multiple continuous discharge powers for a first duration, the difference between any two adjacent continuous discharge powers is calculated; based on the difference, the rate of change of any two adjacent continuous discharge powers is calculated; if the rate of change is greater than a set rate of change, it is determined that the peak discharge power needs to be controlled; or, if the rate of change is less than or equal to the set rate of change, it is determined that the peak discharge power does not need to be controlled. The set rate of change can be set according to actual needs.

[0051] The specific process is as follows: The difference between the second and first continuous discharge powers is calculated, and this difference is divided by the first duration to obtain the rate of change between the first and second continuous discharge powers. This rate of change is then compared with a set rate of change. If the rate of change is less than or equal to the set rate of change, it is determined that no control of the peak discharge power is required. Next, the rate of change between the third and second continuous discharge powers is calculated, and this process continues until it is determined that the rate of change between two adjacent continuous discharge powers is greater than the set rate of change, indicating a rapid decrease in continuous discharge power. At this point, it is determined that control of the peak discharge power is necessary.

[0052] As one possible implementation of step S102, after obtaining multiple continuous discharge powers for a first duration, the difference between any two adjacent continuous discharge powers is calculated; the difference is compared with a set difference to determine whether it is necessary to control the peak discharge power. The set difference can be set according to actual needs.

[0053] The specific process is as follows: Calculate the difference between two adjacent continuous discharge powers, determine whether the difference is greater than a set difference, and based on the determination result, determine whether peak discharge power control is required. Specifically, if the determination result is that the difference is greater than the set difference, meaning the continuous discharge power is rapidly decreasing, then peak discharge power control is required; if the determination result is that the difference is less than or equal to the set difference, then peak discharge power control is not required.

[0054] S103 If it is necessary to control the peak discharge power, then obtain the peak discharge power at the current moment.

[0055] As one possible implementation of step S103, the peak discharge power for the second duration at the current moment is obtained through calculation. The specific calculation process is as follows: online estimation of parameters such as the battery's polarization internal resistance, DC internal resistance, and polarization capacitance, i.e., the battery's second-order RC model, is used to deduce the peak discharge power for the second duration. Thus, the peak discharge power for the second duration at the current moment can be calculated.

[0056] S104 controls the peak discharge power at subsequent times based on the peak discharge power at the current moment.

[0057] As one possible implementation of step S104, the peak discharge power at the current moment is controlled to decrease at a set rate, and this rate is used as the subsequent peak discharge power at the current moment. The set rate can be configured according to actual needs.

[0058] After obtaining the peak discharge power for the second duration at the current moment, the peak discharge power is reduced at a set rate, and the peak discharge power after each reduction is used as the peak discharge power for the second duration at the interval, until the peak discharge power is reduced to the continuous discharge power for the first duration at the current moment, or the set discharge power.

[0059] Therefore, in the process of battery discharge, the present invention first obtains the continuous discharge power of multiple first durations, and determines whether it is necessary to control the peak discharge power of the second duration based on the rate of change of the multiple continuous discharge power. If it is necessary to control the peak discharge power, the peak discharge power at the current moment is obtained, and the peak discharge power at the current moment is controlled based on the peak discharge power at the current moment. This can avoid battery overload and reduce the risk of battery undervoltage.

[0060] Figure 2 This is a flowchart of a battery discharge power control method according to an embodiment of the present invention.

[0061] like Figure 2 As shown, the battery discharge power control method of this embodiment includes:

[0062] S201, during battery discharge, determine that the battery's state of charge is less than or equal to a set state of charge.

[0063] Among them, the state of charge of the battery is the remaining charge of the battery. The state of charge can be set according to actual needs. For example, it can be set to 10% of the battery capacity.

[0064] After the vehicle circuit is connected to the high-voltage circuit, the state of charge of the battery is acquired in real time during the battery discharge process, and the state of charge is judged. If the state of charge of the battery is greater than the set state of charge, the state of charge of the battery continues to be monitored until the state of charge of the battery is less than or equal to the set state of charge, and then step S202 is executed.

[0065] S202, obtain the continuous discharge power for multiple first durations.

[0066] S203, based on the rate of change of multiple continuous discharge powers, determine whether it is necessary to control the peak discharge power of the second duration; wherein, the first duration is longer than the second duration.

[0067] S204 If it is necessary to control the peak discharge power, then obtain the peak discharge power at the current moment.

[0068] S205 controls the peak discharge power at subsequent times based on the peak discharge power at the current moment.

[0069] It should be noted that for details not disclosed in steps S202-S205 above, please refer to the description of steps S101-S104 above, which will not be repeated here.

[0070] S206 controls the actual discharge power of the battery based on the subsequent peak discharge power after control.

[0071] As one possible way to implement step S206, the actual discharge power of the battery at each duration is controlled to be less than or equal to the controlled peak discharge power of the corresponding duration.

[0072] Therefore, when the vehicle circuit is connected to the high-voltage circuit, if the battery is at the end of its discharge, multiple continuous discharge powers for the first duration are obtained. Based on the rate of change of these continuous discharge powers, it is determined whether the peak discharge power for the second duration needs to be controlled. If the peak discharge power needs to be controlled, the peak discharge power at the current moment is obtained, and the subsequent peak discharge power at the current moment is controlled based on the current peak discharge power. Then, the actual discharge power of the battery is controlled based on the controlled subsequent peak discharge power. This can avoid battery overload and reduce the risk of battery undervoltage.

[0073] To enable those skilled in the art to better understand the present invention, the following description is provided in conjunction with... Figure 3 The method for controlling the discharge power of a battery according to an embodiment of the present invention will be described.

[0074] like Figure 3 As shown, the method for controlling the discharge power of this battery includes the following steps:

[0075] S301, Establish the battery model.

[0076] S302, calculate the continuous discharge power over 30 seconds.

[0077] S303, calculate the rate of change of continuous discharge power between two adjacent 30s.

[0078] S304, determine whether the rate of change is greater than the set rate of change. If yes, proceed to step S305; if no, proceed to step S302.

[0079] S305 controls the peak discharge power of 10s to switch at a set rate to the continuous discharge power of 30s at the current moment.

[0080] In summary, the battery discharge power control method according to embodiments of the present invention acquires multiple continuous discharge powers for a first duration during battery discharge, and determines whether it is necessary to control the peak discharge power for a second duration based on the rate of change of the multiple continuous discharge powers. If it is necessary to control the peak discharge power, the peak discharge power at the current moment is acquired, and the peak discharge power subsequent at the current moment is controlled based on the peak discharge power at the current moment; wherein the first duration is longer than the second duration. Therefore, by introducing multiple continuous discharge powers for a first duration and jointly controlling the peak discharge power subsequent at the current moment, this method can avoid battery overload and reduce the risk of battery undervoltage.

[0081] Figure 4 This is a block diagram of a battery discharge power control device according to an embodiment of the present invention.

[0082] like Figure 4 As shown, the battery discharge power control device 400 of this embodiment includes: a first acquisition module 410, a judgment module 420, a second acquisition module 430, and a control module 440.

[0083] The first acquisition module 410 is configured to acquire multiple continuous discharge powers for a first duration during battery discharge. The judgment module 420 is configured to determine, based on the rate of change of the multiple continuous discharge powers, whether it is necessary to control the peak discharge power for a second duration; wherein the first duration is longer than the second duration. The second acquisition module 430 is configured to acquire the peak discharge power at the current moment when it is necessary to control the peak discharge power. The control module 440 is configured to control the peak discharge power subsequent at the current moment based on the peak discharge power at the current moment.

[0084] According to one embodiment of the present invention, the determination module 420 includes: a first calculation unit configured to calculate the difference between any two adjacent continuous discharge powers; a second calculation unit configured to calculate the rate of change of any two adjacent continuous discharge powers based on the difference; and a first determination unit configured to determine that peak discharge power needs to be controlled when the rate of change is greater than a set rate of change; or, the second determination unit configured to determine that peak discharge power does not need to be controlled when the rate of change is less than or equal to a set rate of change.

[0085] According to one embodiment of the present invention, the control module 440 includes: a control unit configured to control the peak discharge power at the current moment to decrease at a set rate, and to use the peak discharge power at the current moment as the subsequent peak discharge power.

[0086] According to an embodiment of the present invention, the battery discharge power control device described above further includes: a determination module, configured to determine that the state of charge of the battery is less than or equal to a set state of charge before acquiring a plurality of first durations of continuous discharge power through the first acquisition module 410.

[0087] According to one embodiment of the present invention, the battery discharge power control device further includes a control module 440, which is further configured to control the actual discharge power of the battery based on the controlled subsequent peak discharge power after controlling the subsequent peak discharge power.

[0088] According to one embodiment of the present invention, when the control module 440 is configured to control the actual discharge power of the battery based on the subsequent peak discharge power after control, the control module 440 includes: controlling the actual discharge power of the battery for each duration to be less than or equal to the subsequent peak discharge power after control for the corresponding duration.

[0089] It should be noted that for details not disclosed in the battery discharge power control device of this embodiment, please refer to the details disclosed in the battery discharge power control method of this embodiment, which will not be repeated here.

[0090] According to an embodiment of the present invention, a battery discharge power control device acquires multiple continuous discharge powers of a first duration during battery discharge. A judgment module determines, based on the rate of change of these multiple continuous discharge powers, whether control of the peak discharge power of a second duration is required. The first duration is longer than the second duration. When control of the peak discharge power is required, the second acquisition module acquires the peak discharge power at the current moment, and a control module controls the peak discharge power subsequent to the current moment based on the current peak discharge power. Thus, by incorporating multiple continuous discharge powers of the first duration and jointly controlling the peak discharge power subsequent to the current moment, the device can avoid battery overload and reduce the risk of battery undervoltage.

[0091] Based on the above embodiments, the present invention also proposes a battery management device.

[0092] The battery management device of this invention includes a processor and a memory; wherein the processor reads executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the battery discharge power control method of the above embodiment.

[0093] The battery management device of this invention, by executing the battery discharge power control method of the above embodiment, introduces multiple continuous discharge powers for a first duration and jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0094] Based on the above embodiments, the present invention also proposes a vehicle.

[0095] The vehicle of this embodiment includes the battery management device described above.

[0096] In the vehicle of this embodiment of the invention, the battery management device described above introduces multiple continuous discharge powers for a first duration and jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0097] Based on the above embodiments, the present invention also proposes a computer-readable storage medium.

[0098] The computer-readable storage medium of this invention stores a computer program, which, when executed by a processor, implements the battery discharge power control method of the above embodiments.

[0099] The computer-readable storage medium of this invention executes the battery discharge power control method of the above embodiments. By introducing multiple continuous discharge powers for a first duration, it jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0100] Based on the above embodiments, the present invention also proposes a computer program product.

[0101] In an embodiment of the present invention, when the instructions in the computer program product are executed by the processor, the battery discharge power control method of the above embodiment is executed.

[0102] The computer program product of this invention executes the battery discharge power control method of the above embodiment. By introducing multiple continuous discharge powers for a first duration, it jointly controls the peak discharge power at the current moment, thereby avoiding battery overload and reducing the risk of battery undervoltage.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0105] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0106] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0107] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0108] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0109] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0110] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the discharge power of a battery, characterized in that, Includes the following steps: During battery discharge, the continuous discharge power for multiple first durations is obtained; Based on the rate of change of the multiple continuous discharge powers, it is determined whether it is necessary to control the peak discharge power of the second duration; wherein the first duration is longer than the second duration; If it is necessary to control the peak discharge power, then obtain the peak discharge power at the current moment; Based on the peak discharge power at the current moment, the peak discharge power at subsequent moments is controlled; The step of determining whether to control the peak discharge power for the second duration based on the rate of change of the plurality of continuous discharge powers includes: Calculate the difference between any two adjacent continuous discharge powers; Based on the difference, calculate the rate of change of any two adjacent continuous discharge powers; If the rate of change is greater than a set rate of change, then it is determined that the peak discharge power needs to be controlled; or, If the rate of change is less than or equal to the set rate of change, then it is determined that there is no need to control the peak discharge power.

2. The battery discharge power control method according to claim 1, characterized in that, The step of controlling the peak discharge power after the current moment based on the peak discharge power at the current moment includes: The peak discharge power at the current moment is controlled to decrease at a set rate, and is used as the peak discharge power for subsequent moments.

3. The battery discharge power control method according to claim 1, characterized in that, Before acquiring the continuous discharge power for multiple first durations, the method further includes: The state of charge of the battery is determined to be less than or equal to a set state of charge.

4. The method for controlling discharge power according to claim 1, characterized in that, After controlling the peak discharge power at the current moment, the method further includes: The actual discharge power of the battery is controlled based on the subsequent peak discharge power after control.

5. The method for controlling discharge power according to claim 4, characterized in that, The step of controlling the actual discharge power of the battery based on the subsequent peak discharge power after control includes: The actual discharge power of the battery at each control period is less than or equal to the controlled subsequent peak discharge power at the corresponding control period.

6. A battery discharge power control device, characterized in that, include: The first acquisition module is configured to acquire the continuous discharge power for multiple first durations during the battery discharge process; The judgment module is configured to determine whether it is necessary to control the peak discharge power for the second duration based on the rate of change of the multiple continuous discharge powers; wherein the first duration is longer than the second duration. The second acquisition module is configured to acquire the peak discharge power at the current moment when it is necessary to control the peak discharge power. The control module is configured to control the peak discharge power at subsequent times based on the peak discharge power at the current time. The judgment module includes: a first calculation unit configured to calculate the difference between any two adjacent continuous discharge powers; a second calculation unit configured to calculate the rate of change of any two adjacent continuous discharge powers based on the difference; and a first determination unit configured to determine that peak discharge power needs to be controlled when the rate of change is greater than a set rate of change; or, a second determination unit configured to determine that peak discharge power does not need to be controlled when the rate of change is less than or equal to a set rate of change.

7. A battery management device, characterized in that, include: Processor and memory; The processor reads executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the battery discharge power control method as described in any one of claims 1-5.

8. A vehicle characterized by, include: The battery management device as described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the battery discharge power control method as described in any one of claims 1-5.

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