Power switching methods, devices, readable storage media, and vehicles for power batteries

Abstract

This invention discloses a power switching method, apparatus, readable storage medium, and vehicle for a power battery. The method includes: in response to the vehicle being in motion, controlling the vehicle's power battery to discharge at a first discharge power, wherein the first discharge power indicates the maximum discharge power of the power battery; during the discharge of the power battery at the first discharge power, acquiring the vehicle's required discharge power; in response to the required discharge power being greater than a second discharge power, acquiring the duration for which the required discharge power is greater than the second discharge power, wherein the second discharge power indicates the minimum discharge power of the power battery; based on the duration and the operating state of the power battery, determining the target discharge power of the power battery; and switching the discharge power of the power battery from the first discharge power to the target discharge power. This invention solves the technical problem of the inability to accurately adjust the discharge power of a power battery.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and more specifically, to a power switching method, apparatus, readable storage medium, and vehicle for a power battery. Background Technology

[0002] Currently, with the continuous advancement of battery technology, the driving range and performance of vehicle power batteries have been significantly improved. By adjusting the discharge power of the power battery, vehicle performance and efficiency can be enhanced. Therefore, accurately adjusting the discharge power of a vehicle's power battery helps achieve better performance and driving range, improves user experience, and promotes the development of new energy vehicles.

[0003] In related technologies, adjusting the charging and discharging power of a vehicle's power battery using a single power chart may lead to a mismatch between the power chart and the current battery usage as the discharge time increases. In such cases, continuing to use a single power chart to adjust the charging and discharging power of the power battery may result in excessive battery discharge power, frequently triggering undervoltage faults and damaging battery performance due to over-discharge, or insufficient battery discharge power, affecting the vehicle's performance. This presents a technical problem of not being able to accurately adjust the discharge power of the power battery.

[0004] There is currently no effective solution to the aforementioned technical problem of being unable to accurately adjust the discharge power of the power battery. Summary of the Invention

[0005] This invention provides a power switching method, apparatus, readable storage medium, and vehicle for a power battery, to at least solve the technical problem of the inability to accurately adjust the discharge power of a power battery.

[0006] According to one aspect of the present invention, a power switching method for a power battery is provided. The method may include: in response to a vehicle being in a driving state, controlling the vehicle's power battery to discharge at a first discharge power, wherein the first discharge power indicates the maximum discharge power of the power battery; during the discharge of the power battery at the first discharge power, acquiring the vehicle's required discharge power, wherein the required discharge power indicates the discharge power of the power battery required by the vehicle in the driving state; in response to a required discharge power greater than a second discharge power, acquiring the duration for which the required discharge power is greater than the second discharge power, wherein the second discharge power indicates the minimum discharge power of the power battery; determining a target discharge power of the power battery based on the duration and the operating state of the power battery; and switching the discharge power of the power battery from the first discharge power to the target discharge power.

[0007] Optionally, the target discharge power of the power battery is determined based on the duration and the operating state of the power battery, including: determining a target discharge power spectrum corresponding to the power battery based on the duration and the operating state of the power battery, wherein the target discharge power spectrum is used at least to indicate the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, and the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery; and determining the target discharge power in the target discharge power spectrum based on the state of charge and the battery temperature of the power battery.

[0008] Optionally, the operating states of the power battery include at least a discharge state and a charging state. Based on the duration and the operating states of the power battery, a target discharge power spectrum corresponding to the power battery is determined, including: in response to the power battery being in a discharge state and the duration not exceeding a first duration, determining the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum; in response to the power battery being in a discharge state and the duration exceeding the first duration but less than a second duration, determining the target discharge power spectrum corresponding to the power battery as a second discharge power spectrum; and in response to the power battery being in a discharge state and the duration exceeding the second duration, determining the target discharge power of the power battery as a third discharge power spectrum.

[0009] Optionally, when the state of charge and temperature of the power battery remain constant, the first discharge duration of the power battery discharging according to the discharge power in the first discharge power spectrum is less than the second discharge duration of the power battery discharging according to the discharge power in the second discharge power spectrum, and the second discharge duration is less than the third discharge duration of the power battery discharging according to the discharge power in the third discharge power spectrum.

[0010] Optionally, in response to the power battery discharging according to the discharge power in the third discharge power spectrum, or in response to the power battery discharging according to the discharge power in the second discharge power spectrum, the method further includes: in response to the vehicle's required discharge power being less than the second discharge power, and the duration for which the vehicle's required discharge power is less than the second discharge power exceeding a duration threshold, or in response to the power battery being in a charging state, determining the target discharge power spectrum of the power battery as the first discharge power spectrum; and controlling the power battery to discharge based on the first discharge power spectrum.

[0011] Optionally, based on the duration and the operating state of the power battery, the target discharge power spectrum corresponding to the power battery is determined, including: in response to the power battery operating state being a charging state and the duration not exceeding a first duration, the target discharge power spectrum corresponding to the power battery is determined as a first discharge power spectrum; in response to the power battery operating state being a charging state and the duration exceeding the first duration and less than a second duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum.

[0012] According to another aspect of the present invention, a power switching device for a power battery is also provided. The device may include: a control unit, configured to control the vehicle's power battery to discharge at a first discharge power in response to the vehicle being in a driving state, wherein the first discharge power indicates the maximum discharge power of the power battery; a first acquisition unit, configured to acquire the vehicle's required discharge power during the discharge of the power battery at the first discharge power, wherein the required discharge power indicates the discharge power of the power battery required by the vehicle in a driving state; a second acquisition unit, configured to acquire the duration for which the required discharge power is greater than the second discharge power in response to the required discharge power being greater than the second discharge power, wherein the second discharge power indicates the minimum discharge power of the power battery; a determination unit, configured to determine the target discharge power of the power battery based on the duration and the operating state of the power battery; and a switching unit, configured to switch the discharge power of the power battery from the first discharge power to the target discharge power.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is run by a processor, it controls the device where the storage medium is located to execute the power switching method of the power battery in the embodiments of the present invention.

[0014] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program executes the power switching method for a power battery according to the embodiments of the present invention.

[0015] According to another aspect of the present invention, a vehicle is also provided. This vehicle is used to execute the power switching method for a power battery according to the embodiments of the present invention.

[0016] In this embodiment of the invention, in response to the vehicle being in a driving state, the vehicle's power battery is controlled to discharge at a first discharge power, wherein the first discharge power is used to indicate the maximum discharge power of the power battery; during the process of the power battery discharging at the first discharge power, the required discharge power of the vehicle is obtained, wherein the required discharge power is used to indicate the discharge power of the power battery required by the vehicle in a driving state; in response to the required discharge power being greater than a second discharge power, the duration for which the required discharge power is greater than the second discharge power is obtained, wherein the second discharge power is used to indicate the minimum discharge power of the power battery; based on the duration and the operating state of the power battery, the target discharge power of the power battery is determined; and the discharge power of the power battery is switched from the first discharge power to the target discharge power. In other words, in this embodiment of the invention, when the vehicle is in motion, the power battery is first discharged at its maximum discharge power to provide the vehicle with the maximum available discharge capacity. When the actual discharge power required by the vehicle is greater than the minimum discharge power, the target discharge power of the power battery is determined based on the actual discharge power required by the power battery and the battery's operating state. The discharge power of the power battery is then switched to the target discharge power, thereby achieving the purpose of flexibly adjusting the discharge power of the power battery according to the actual discharge power required by the vehicle. This achieves the purpose of accurately adjusting the discharge power of the power battery, thus solving the technical problem of not being able to accurately adjust the discharge power of the power battery. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a power switching method for a power battery according to an embodiment of the present invention;

[0019] Figure 2 This is a flowchart of a pure electric vehicle powertrain capability calculation and switching control method according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a peak driving torque according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a peak recovery torque according to an embodiment of the present invention;

[0022] Figure 5 This is a flowchart of a method for switching the discharge power map of a power battery according to an embodiment of the present invention;

[0023] Figure 6A flowchart of a method for switching charging power maps of a power battery according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of a power switching device for a power battery according to an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, functional component, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, functional components, or devices.

[0027] Example 1

[0028] According to an embodiment of the present invention, an embodiment of a power switching method for a power battery is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0029] Figure 1 This is a flowchart of a power switching method for a power battery according to an embodiment of the present invention, such as... Figure 1 As shown, the method may include the following steps:

[0030] Step S101: In response to the vehicle being in motion, control the vehicle's power battery to discharge according to the first discharge power.

[0031] In the technical solution provided by step S101 of the present invention, the first discharge power is used to indicate the maximum discharge power of the power battery.

[0032] In this embodiment, when the vehicle is in motion, the vehicle's power battery is controlled to discharge at a first discharge power, that is, the vehicle is controlled to discharge at the maximum discharge power to provide the vehicle with the maximum available discharge capacity.

[0033] For example, multiple charge / discharge power maps are designed in advance through bench testing; three maps are used as an example here. For instance, the three discharge power maps are named the 10s discharge power map, the 30s discharge power map, and the 60s discharge power map, respectively. The 10s discharge power map can also be called the first discharge power map, dischar_map1, 10s map; the 30s discharge power map can also be called the second discharge power map, dischar_map2, 30s map; and the 60s discharge power map can also be called the third discharge power map, dischar_map3, 60s map. Under the same state of charge and battery temperature, the higher the discharge power of the power battery, the shorter the discharge time. Therefore, the discharge power in dischar_map1 is greater than the discharge power in dischar_map2, which is greater than the discharge power in dischar_map3. Based on this, it can be determined that the discharge power in dischar_map1 is the largest. In this case, the first discharge power can be obtained from dischar_map1 based on the current state of charge and battery temperature of the power battery. The discharge power spectrum is used to indicate at least the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, as well as the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery. This is only an example.

[0034] Optionally, the vehicle's power battery can be controlled to discharge at a first discharge power through a Battery Management System (BMS).

[0035] Step S102: During the process of the power battery discharging at the first discharge power, the required discharge power of the vehicle is obtained.

[0036] In the technical solution provided by step S102 of the present invention, the required discharge power is used to indicate the discharge power of the power battery required by the vehicle in the driving state. The required discharge power can also be referred to as the vehicle required discharge power, the vehicle required battery power, etc.

[0037] In this embodiment, after controlling the vehicle's power battery to discharge at the first discharge power in step S101, the required discharge power of the vehicle is obtained during the process of the power battery discharging at the first discharge power, and then the discharge power of the power battery is adjusted according to the required discharge power of the vehicle.

[0038] For example, during the discharge of the power battery at the first discharge power, parameters such as vehicle acceleration, driving speed and road conditions can be monitored in real time to determine the current power demand of the vehicle, thereby determining the actual discharge power that the power battery needs to provide, that is, the vehicle's required discharge power.

[0039] Step S103: In response to the demand discharge power being greater than the second discharge power, obtain the duration for which the demand discharge power is greater than the second discharge power.

[0040] In the technical solution provided in step S103 of the present invention, the second discharge power is used to indicate the minimum discharge power of the power battery. For example, as described above, the discharge power corresponding to the 60s discharge power spectrum is the minimum discharge power. Based on this, the second discharge power can be the discharge power corresponding to the 60s discharge power spectrum. This is only an example and does not limit the specific content of the second discharge power.

[0041] In this embodiment, after obtaining the vehicle's required discharge power according to step S102, the vehicle's required discharge power is compared with the second discharge power. When the vehicle's required discharge power is greater than the second discharge power, the duration for which the required discharge power is greater than the second discharge power is further obtained.

[0042] For example, after obtaining the vehicle's required discharge power, it is further determined whether the vehicle's required discharge power is the second discharge power. If it is greater, the vehicle's timing function is triggered to record the duration for which the vehicle's required discharge power is greater than the second discharge power. The duration can be represented by T1.

[0043] Step S104: Based on the duration and the operating state of the power battery, determine the target discharge power of the power battery.

[0044] In the technical solution provided by step S104 of the present invention, the working state of the power battery can be at least a discharge state and a charging state.

[0045] In this embodiment, after obtaining the duration for which the required discharge power is greater than the second discharge power according to step S103, a target discharge power map of the power battery is determined based on the duration and the operating state of the power battery. The target discharge power map at least indicates the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, as well as the mapping relationship between the discharge power of the power battery and the battery temperature. The target discharge power map can be at least one of a first discharge power map (dischar_map1), a second discharge power map (dischar_map2), and a third discharge power map (dischar_map3).

[0046] Optionally, the operating state of the power battery can be determined based on the actual discharge power required by the vehicle. For example, when the vehicle's required discharge power is negative, it indicates that the vehicle is converting its kinetic energy into electrical energy and feeding it back into the battery during deceleration or braking. At this time, the power battery is in an energy recovery state, and its operating state can be determined as a charging state. When the vehicle's required battery power is positive, it indicates that the vehicle needs to release electrical energy from the power battery to provide power to drive the vehicle, and its operating state can be determined as a discharging state.

[0047] Optionally, when the power battery is in a discharging state, and the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is not greater than the first duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum; when the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is greater than the first duration but less than the second duration, the target discharge power spectrum corresponding to the power battery is determined as the second discharge power spectrum; when the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is greater than the second duration, the target discharge power spectrum corresponding to the power battery is determined as the third discharge power spectrum.

[0048] For example, assuming the first duration is 10s, the second duration is 30s, and the third duration is 60s, when the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is 5s, since 5s < 10s, that is, the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is not greater than the first duration, in this case, the target discharge power spectrum corresponding to the power battery can be determined as the first discharge power spectrum. That is, the power battery is controlled to discharge according to the discharge power in the first discharge power spectrum to provide the maximum available discharge demand for the vehicle.

[0049] Optionally, after determining the target discharge power spectrum, since the target discharge power spectrum is used to indicate at least the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, as well as the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery, the target discharge power is determined in the target discharge power spectrum based on the state of charge of the power battery and the battery temperature of the power battery.

[0050] For example, assuming the state of charge of the power battery is 15% and the battery temperature is -30℃ in the target discharge power spectrum, the corresponding discharge power is 20W. In this case, if the current state of charge of the power battery is 15% and the battery temperature is -30℃, then the target discharge power determined in the target discharge power spectrum is 20W.

[0051] Optionally, when the power battery is in a charging state, the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is obtained. When the duration is greater than the first duration but less than the second duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum.

[0052] Optionally, when the power battery is in a charging state, the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is obtained. When the duration is not greater than the first duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum.

[0053] In this embodiment, when the power battery is in a charging state, that is, when the power battery is in an energy recovery state during vehicle operation, the target discharge power spectrum corresponding to the power battery can be determined based on the duration during which the actual discharge power required by the vehicle is greater than the second discharge power. Then, the target discharge power can be determined from the target discharge power spectrum based on the state of charge and battery temperature of the power battery.

[0054] Step S105: Switch the discharge power of the power battery from the first discharge power to the target discharge power.

[0055] In the technical solution provided by step S105 of the present invention, after determining the target discharge power of the power battery according to step S104, the discharge power of the power battery is switched from the first discharge power to the target discharge power.

[0056] In this embodiment, after determining the target discharge power of the power battery, the discharge power of the power battery is switched from the first discharge power to the target discharge power. For example, the discharge power of the power battery can be switched through the vehicle's battery management system. This is merely an example and does not limit the specific method for adjusting the discharge power of the power battery.

[0057] It should be noted that the above embodiments can be executed through the vehicle's battery management system or the vehicle's control unit.

[0058] In steps S101 to S105 of the present invention, when the vehicle is in motion, the power battery is first discharged at its maximum discharge power to provide the vehicle with the maximum available discharge demand. When the actual discharge power demand of the vehicle is greater than the minimum discharge power, the target discharge power of the power battery is determined based on the actual discharge power demand of the power battery and the battery's operating state. The discharge power of the power battery is then switched to the target discharge power, thereby achieving the purpose of flexibly adjusting the discharge power of the power battery according to the actual discharge power demand of the vehicle. This achieves the purpose of accurately adjusting the discharge power of the power battery, thus solving the technical problem of not being able to accurately adjust the discharge power of the power battery.

[0059] The method described in this embodiment will be further described below.

[0060] As an optional embodiment, step S104, determining the target discharge power of the power battery based on the duration and the operating state of the power battery, includes: determining a target discharge power spectrum corresponding to the power battery based on the duration and the operating state of the power battery, wherein the target discharge power spectrum is at least used to indicate the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, and the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery; and determining the target discharge power in the target discharge power spectrum based on the state of charge and the battery temperature of the power battery.

[0061] In this embodiment, as described above, the duration indicates the duration for which the actual required discharge power of the vehicle is greater than the second discharge power. Based on the duration and the operating state of the power battery, the target discharge power spectrum corresponding to the power battery can be determined. The target discharge power spectrum can be at least a first discharge power spectrum (denoted as dischar_map1), a second discharge power spectrum (denoted as dischar_map2), or a third discharge power spectrum (denoted as dischar_map3).

[0062] Optionally, after determining the target discharge power spectrum, since the target discharge power spectrum is used to include at least the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, and the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery, the target discharge power of the power battery can be determined in the target discharge power spectrum based on the state of charge and the battery temperature of the power battery.

[0063] As an optional embodiment, the operating state of the power battery includes at least a discharge state and a charging state. Based on the duration and the operating state of the power battery, a target discharge power spectrum corresponding to the power battery is determined, including: in response to the power battery being in a discharge state and the duration not exceeding a first duration, determining the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum; in response to the power battery being in a discharge state and the duration exceeding the first duration but less than a second duration, determining the target discharge power spectrum corresponding to the power battery as a second discharge power spectrum; and in response to the power battery being in a discharge state and the duration exceeding the second duration, determining the target discharge power of the power battery as a third discharge power spectrum.

[0064] In this embodiment, when the power battery is in a discharging state, if the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is not greater than the first duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum; if the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is greater than the first duration but less than the second duration, the target discharge power spectrum corresponding to the power battery is determined as the second discharge power spectrum; if the duration for which the actual discharge power demanded by the vehicle is greater than the second discharge power is greater than the second duration, the target discharge power spectrum corresponding to the power battery is determined as the third discharge power spectrum.

[0065] For example, when the power battery is in a discharging state, assuming the first duration is 10s, the second duration is 30s, and the third duration is 60s, the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is 15s. Since 10s > 15s < 30s, that is, the duration for which the actual required discharge power of the vehicle is greater than the second discharge power is greater than the first duration and less than the second duration, based on this, the target discharge power spectrum corresponding to the power battery can be determined to be the second discharge power spectrum.

[0066] As an optional embodiment, when the state of charge and battery temperature of the power battery remain constant, the first discharge duration of the power battery discharging according to the discharge power in the first discharge power spectrum is less than the second discharge duration of the power battery discharging according to the discharge power in the second discharge power spectrum, and the second discharge duration is less than the third discharge duration of the power battery discharging according to the discharge power in the third discharge power spectrum.

[0067] In this embodiment, as described above, under the same state of charge and battery temperature, the greater the discharge power of the power battery, the shorter the discharge time. Since the discharge power in dischar_map1 is greater than the discharge power in dischar_map2 is greater than the discharge power in dischar_map3, it can be determined that when the state of charge and battery temperature of the power battery remain unchanged, the first discharge time of the power battery discharging according to the discharge power in the first discharge power spectrum is less than the second discharge time of the power battery discharging according to the discharge power in the second discharge power spectrum, and the second discharge time is less than the third discharge time of the power battery discharging according to the discharge power in the third discharge power spectrum.

[0068] For example, when the state of charge and temperature of the power battery remain constant, the first discharge duration of the power battery according to the discharge power in dischar_map1 can be 10s, the second discharge duration of the power battery according to the discharge power in dischar_map2 can be 30s, and the third discharge duration of the power battery according to the discharge power in dischar_map3 can be 60s.

[0069] As an optional embodiment, in response to the power battery discharging according to the discharge power in the third discharge power spectrum, or in response to the power battery discharging according to the discharge power in the second discharge power spectrum, the method further includes: in response to the vehicle's required discharge power being less than the second discharge power, and the duration for which the vehicle's required discharge power is less than the second discharge power exceeding a duration threshold, or in response to the power battery being in a charging state, determining the target discharge power spectrum of the power battery as the first discharge power spectrum; and controlling the power battery to discharge based on the first discharge power spectrum.

[0070] In this embodiment, when the vehicle's required discharge power is less than the second discharge power, and the duration for which the vehicle's required discharge power is less than the second discharge power exceeds a duration threshold, the target discharge power spectrum of the power battery is determined to be the first discharge power spectrum. The duration threshold can be 60 seconds; this is merely an example and does not limit the specific value of the duration threshold.

[0071] Optionally, when the power battery is in a charging state, the target discharge power spectrum of the power battery is determined as the first discharge power spectrum.

[0072] For example, when the required discharge power is negative, it means that during the deceleration or braking process, the energy in the power battery is converted into electrical energy and fed back to the battery. At this time, the power battery is in an energy recovery state, and it can be determined that the power battery is in a charging state. Therefore, the target discharge power spectrum of the power battery can be determined as the first discharge power spectrum.

[0073] Optionally, after determining the target discharge power spectrum of the power battery as the first discharge power spectrum, the power battery is controlled to discharge according to the first discharge power spectrum.

[0074] As an optional embodiment, determining the target discharge power spectrum corresponding to the power battery based on the duration and the operating state of the power battery includes: determining the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum when the operating state of the power battery is a charging state and the duration is not greater than a first duration; and determining the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum when the operating state of the power battery is a charging state and the duration is greater than the first duration and less than a second duration.

[0075] In this embodiment, when the power battery is in a charging state and the duration is not greater than a first duration, the target discharge power spectrum corresponding to the power battery is determined to be the first discharge power spectrum.

[0076] Optionally, when the power battery is in a charging state and the duration is greater than a first duration but less than a second duration, the target discharge power spectrum corresponding to the power battery is determined as the first discharge power spectrum.

[0077] It should be noted that the above embodiments can be executed through the vehicle's battery management system or the vehicle's control unit.

[0078] In this embodiment, when the vehicle is in motion, the power battery is first discharged at its maximum discharge power to provide the vehicle with the maximum available discharge capacity. When the actual discharge power required by the vehicle exceeds the minimum discharge power, the target discharge power of the power battery is determined based on the actual discharge power required by the power battery and the battery's operating state. The discharge power of the power battery is then switched to the target discharge power, thereby achieving the goal of flexibly adjusting the discharge power of the power battery according to the actual discharge power required by the vehicle. This achieves the goal of accurately adjusting the discharge power of the power battery, thus solving the technical problem of not being able to accurately adjust the discharge power of the power battery.

[0079] Example 2

[0080] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0081] Currently, with the continuous advancement of battery technology, the driving range and performance of vehicle power batteries have been significantly improved. By adjusting the discharge power of the power battery, vehicle performance and efficiency can be enhanced. Therefore, accurately adjusting the discharge power of a vehicle's power battery helps achieve better performance and driving range, improves user experience, and promotes the development of new energy vehicles.

[0082] In related technologies, adjusting the charging and discharging power of a vehicle's power battery using a single power chart can lead to problems. As discharge time increases, the power chart may become mismatched with the current battery usage. In such cases, continuing to use a single power chart to adjust the battery's charging and discharging power could result in either excessive battery discharge power, frequently triggering undervoltage faults and damaging battery performance due to over-discharge, or insufficient battery discharge power, affecting vehicle performance. This presents a technical problem of inaccurately adjusting the power battery's discharge power. Currently, no effective solution has been proposed to address this issue.

[0083] However, this invention proposes a method for calculating and switching the powertrain capacity of a pure electric vehicle. By calculating the discharge and charging capacity of the power battery through the BMS, the discharge power of the battery is flexibly switched according to the discharge and charging capacity of the power battery, thereby achieving the goal of accurately adjusting the discharge power of the battery and solving the technical problem of not being able to accurately adjust the discharge power of the power battery.

[0084] The embodiments of the present invention will be further described below.

[0085] Figure 2 This is a flowchart of a pure electric vehicle powertrain capability calculation and switching control method according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following steps:

[0086] Step S201: Calculate the motor's drive and regenerative braking capabilities and send the results to the vehicle control unit.

[0087] In this embodiment, the motor controller MCU calculates the motor's driving and regenerative braking capabilities and sends them to the vehicle control unit (VCU).

[0088] Optionally, the peak driving torque and peak recovery torque of the motor under different voltages can be obtained by electric drive bench testing as a function of motor speed. Figure 3 This is a schematic diagram of a peak drive torque according to an embodiment of the present invention. Figure 4 This is a schematic diagram of a peak recovery torque according to an embodiment of the present invention, such as... Figure 3 and Figure 4 As shown, the current peak drive torque (T_drive_ini) and peak recovery torque (T_brake_ini) of the motor can be determined by looking up the table based on the motor bus voltage.

[0089] Optionally, the external characteristic coefficients of the motor can be determined based on the motor temperature and the inverter temperature. The coefficient related to the inverter temperature is η_inv, and the coefficient related to the motor temperature is η_motor. The peak drive torque capability of the motor can be: T_drive_max = T_drive_ini * η_inv * η_motor, and the peak recovery capability of the motor can be: T_brake_max = T_brake_ini * η_inv * η_motor.

[0090] Optionally, η_inv is related to the inverter temperature, and the specific value needs to be determined based on the measured data. Table 1 is a table of inverter temperature coefficients. As shown in Table 1, the corresponding inverter temperature coefficient can be obtained by looking up the table according to the current inverter temperature using linear interpolation.

[0091] Table 1. Inverter Temperature Coefficient Comparison Table

[0092] η_inv 1 1 η_inv_3 ……. η_inv_x 0

[0093] Optionally, η_motor is related to the temperature of the motor body, and the specific value needs to be determined based on the measured data. Table 2 is a table of motor body temperature coefficients. As shown in Table 2, the corresponding motor body temperature coefficient can be obtained by looking up the table according to the current motor body temperature using linear interpolation.

[0094] Table 2. Comparison of Temperature Coefficient of Motor Body

[0095] η_motor 1 1 η_motor_3 ……. η_motor_x 0

[0096] In step S202, the battery's discharge and charge capabilities are calculated and sent to the vehicle control unit.

[0097] In this embodiment, the battery's discharge and charge capabilities are calculated by the BMS and sent to the vehicle control unit.

[0098] Optionally, three charge / discharge power maps are designed through bench testing. The discharge maps are named dischar_map1, dischar_map2, and dischar_map3, and the charge maps are named char_map1, char_map2, and char_map3, respectively. The time units corresponding to dischar_map1, dischar_map2, and dischar_map3 for the three discharge maps are 10s, 30s, and 60s, respectively. These time units are preferred values ​​and not unique fixed values. According to battery characteristics, at the same SOC and temperature, the power value in dischar_map1 is greater than that in the discharge maps.

[0099] The power value in dischar_map2 is greater than the power value in dischar_map3.

[0100] Optionally, the three charging maps, char_map1, char_map2, and char_map3, correspond to time units of 10s, 30s, and 60s, respectively. These time units are preferred values ​​and not unique fixed values. Based on battery characteristics, at the same SOC and temperature, the power value in char_map1 > the power value in char_map2 > ...

[0101] The power values ​​in char_map3.

[0102] Optionally, the power values ​​corresponding to the charge / discharge power maps are related to the battery's SOC and battery temperature. The discharge map is shown in Table 3, and the charging map is shown in Table 4. The above-mentioned corresponding time system means the duration that can be sustained at a certain power. For example, in Table 3, at -30℃ and 90% SOC, the battery can guarantee a continuous output of 86kW for 10 seconds. For example, in Table 4, at -20℃ and 90% SOC, the battery can guarantee a continuous charging at 6kW for 10 seconds.

[0103] Table 3. Comparison of Power Battery Discharge Power (Partial)

[0104]

[0105] Table 4. Comparison of Charging Power of Power Batteries (Partial)

[0106]

[0107] For example, a suitable charge / discharge power map can be selected based on the battery's state of charge, battery temperature, and current battery operating conditions, and then the corresponding charge / discharge power can be selected from the charge / discharge power map.

[0108] In step S203, the vehicle control unit calculates the powertrain capability based on the motor's driving and regenerative braking capabilities, as well as the battery's discharge and charging capabilities.

[0109] In this embodiment, the vehicle control unit calculates the powertrain capability based on the motor's driving and regenerative braking capabilities, as well as the battery's discharge and charging capabilities.

[0110] Optionally, for driving conditions, the battery's powertrain capability T_powertrain is calculated based on the battery discharge power P_dischar, the motor's peak drive torque T_drive, the motor's current speed n_motor, and the motor's current efficiency η_motor, as shown in the following formula:

[0111] T_powertrain=min(T_drive,P_dischar*η_motor*9549 / n_motor)

[0112] Optionally, for energy recovery conditions, the battery's powertrain capability T_powertrain1 can be calculated based on the battery charging power P_char, the motor peak drive torque T_drive1, the motor current speed n_motor1, and the motor current efficiency η_motor1, as shown in the following formula:

[0113] T_powertrain1=min(T_drive1,P_dischar1*9549 / n_motor1 / η_motor)

[0114] In this embodiment, by designing a suitable battery charging and discharging power map and performing appropriate switching control, the vehicle's power and economy are ensured on the one hand, while overcharging and over-discharging of the battery are avoided, which could lead to alarms or affect battery life. By using bench tests and other methods, the corresponding relationship between the electric drive's external characteristics and voltage and temperature is obtained, and reasonable electric drive capabilities are provided to ensure both the electric drive's lifespan and the vehicle's power requirements.

[0115] Figure 5 This is a flowchart of a method for switching the discharge power map of a power battery according to an embodiment of the present invention, as shown below. Figure 5 As shown, the method includes the following steps:

[0116] Step S501: Control the power battery to output power according to the default power.

[0117] In this embodiment, the power battery is controlled to output power according to the default power, that is, the power battery is controlled to discharge according to the default power, where the default power is the power in the 10s map, that is, the discharge power corresponding to dischar_map1.

[0118] Step S502: Does the actual battery power required by the vehicle exceed the power value corresponding to the 60s map?

[0119] In this embodiment, the actual battery power required by the vehicle is obtained, and it is determined whether the actual battery power required by the vehicle is greater than the power value corresponding to 60smap. If the actual battery power required by the vehicle is greater than the power value corresponding to 60smap, step S503 is executed; if the actual battery power required by the vehicle is not greater than the power value corresponding to 60smap, step S501 is executed.

[0120] Step S503: Start timing T1.

[0121] In this embodiment, timing begins, and the time is represented by T1.

[0122] Step S504: Check if the battery power becomes negative during the timing process.

[0123] In this embodiment, it is determined whether the battery power is negative during the timing process. If a negative value is found, step S510 is executed; if no negative value is found, step S505 is executed.

[0124] Step S505: Is T1 greater than 10s?

[0125] In this embodiment, it is determined whether T1 is greater than 10s. If T1 is greater than 10s, step S506 is executed. If T1 is not greater than 10s, step S501 is executed.

[0126] Step S506: Continue timing.

[0127] In this embodiment, the discharge time of the power battery is continuously recorded.

[0128] Step S507: Check if the battery power becomes negative during the timing process.

[0129] In this embodiment, it is determined whether the battery power is negative during the timing process. If a negative value is found, step S510 is executed; if no negative value is found, step S508 is executed.

[0130] Step S508, is T1 greater than 30s?

[0131] In this embodiment, it is determined whether T1 is greater than 30s. If T1 is greater than 30s, step S509 is executed; if T1 is not greater than 30s, step S512 is executed.

[0132] Step S509: Output the discharge power according to the 60s map.

[0133] In this embodiment, the power battery is controlled to discharge according to the discharge power in the 60s map, that is, to discharge according to the discharge power corresponding to dischar_map3.

[0134] Step S510: Stop the timer.

[0135] In this embodiment, the recording of the power battery discharge time is stopped.

[0136] Step S511: Does condition one or condition two satisfy?

[0137] In this embodiment, it is determined whether the discharge power of the power battery meets either condition one or condition two. Condition one is: the battery power required by the vehicle is ≤ the corresponding value in the 60s map and lasts for a certain period of time (preferably 60s); condition two is: the battery power required by the vehicle is negative, that is, the battery is in a charging state.

[0138] Optionally, if the power battery discharge power meets condition one or condition two, step S501 is executed; if the power battery discharge power does not meet condition one or condition two, step S509 is executed.

[0139] Step S512: Output the discharge power according to the 30smap.

[0140] In this embodiment, the power battery is controlled to discharge according to the discharge power in the 30s map, that is, to discharge according to the discharge power corresponding to dischar_map2.

[0141] Step S513: Is condition 1 or condition 2 satisfied?

[0142] In this embodiment, it is determined whether the discharge power of the power battery meets condition 1 or condition 2. If the discharge power of the power battery meets condition 1 or condition 2, step S501 is executed; if the discharge power of the power battery does not meet condition 1 or condition 2, step S512 is executed.

[0143] Figure 6 A flowchart of a method for switching charging power maps of a power battery according to an embodiment of the present invention is shown below. Figure 6 The method includes the following steps:

[0144] Step S601: Control the power battery to output power according to the default power.

[0145] In this embodiment, the power battery is controlled to output power according to the default power, that is, the power battery is controlled to discharge according to the default power, where the default power is the power in the 10s map, that is, the discharge power corresponding to dischar_map1.

[0146] Step S602: Does the actual battery power required by the vehicle exceed the power value corresponding to 60smap?

[0147] In this embodiment, the actual battery power required by the vehicle is obtained, and it is determined whether the actual battery power required by the vehicle is greater than the power value corresponding to 60smap. If the actual battery power required by the vehicle is greater than the power value corresponding to 60smap, then step S63 is executed; if the actual battery power required by the vehicle is not greater than the power value corresponding to 60smap, then step S61 is executed.

[0148] Step S603: Start timing T1.

[0149] In this embodiment, timing begins, and the time is represented by T1.

[0150] Step S604: Check if the battery power becomes negative during the timing process.

[0151] In this embodiment, it is determined whether the battery power is negative during the timing process. If a negative value is found, step S56 is executed; otherwise, step S65 is executed.

[0152] Step S605, is T1 greater than 10s?

[0153] In this embodiment, it is determined whether T1 is greater than 10s. If T1 is greater than 10s, step S606 is executed; if T1 is not greater than 10s, step S61 is executed.

[0154] Step S606: Continue timing.

[0155] In this embodiment, the discharge time of the power battery is continuously recorded.

[0156] Step S607: Check if the battery power becomes negative during the timing process.

[0157] In this embodiment, it is determined whether the battery power is negative during the timing process. If a negative value is found, step S610 is executed; if no negative value is found, step S608 is executed.

[0158] Step S608, is T1 greater than 30s?

[0159] In this embodiment, it is determined whether T1 is greater than 30s. If T1 is greater than 30s, step S609 is executed; if T1 is not greater than 30s, step S612 is executed.

[0160] Step S609: Output the discharge power according to the 60s map.

[0161] In this embodiment, the power battery is controlled to discharge according to the discharge power in the 60s map, that is, to discharge according to the discharge power corresponding to dischar_map3.

[0162] Step S610: Stop the timer.

[0163] In this embodiment, the recording of the power battery discharge time is stopped.

[0164] Step S611: Does condition three or condition four satisfy?

[0165] In this embodiment, it is determined whether the discharge power of the power battery meets condition three or condition four. Condition three is: the absolute value of the battery power required by the vehicle is ≤ the absolute value of the corresponding value in the 60s map, and this condition lasts for more than a certain period of time (preferably 60s); condition four is: the battery power required by the vehicle is a positive value, that is, the battery is in a discharge state.

[0166] Optionally, if the power battery discharge power meets condition three or condition four, step S601 is executed; if the power battery discharge power does not meet condition three or condition four, step S609 is executed.

[0167] Step S612: Output the discharge power according to the 30smap.

[0168] In this embodiment, the power battery is controlled to discharge according to the discharge power in the 30s map, that is, to discharge according to the discharge power corresponding to dischar_map2.

[0169] Step S613: Is condition 3 or condition 4 satisfied?

[0170] In this embodiment, it is determined whether the discharge power of the power battery meets condition 3 or condition 4. If the discharge power of the power battery meets condition 3 or condition 4, step S601 is executed; if the discharge power of the power battery does not meet condition 3 or condition 4, step S612 is executed.

[0171] In the above Figure 5 and Figure 6 In this process, the discharge and charging capabilities of the power battery are calculated by the BMS. Based on these capabilities, the battery's discharge power is flexibly switched, achieving the goal of accurately adjusting the battery's discharge power and thus solving the technical problem of not being able to accurately adjust the power battery's discharge power.

[0172] Example 3

[0173] According to an embodiment of the present invention, a power switching device for a power battery is also provided. It should be noted that this power switching device for a power battery can be used to execute the power switching method for a power battery in Embodiment 1.

[0174] Figure 7 This is a schematic diagram of a power switching device for a power battery according to an embodiment of the present invention. Figure 7 As shown, the power switching device 700 of the power battery may include: a control unit 701, a first acquisition unit 702, a second acquisition unit 703, a determination unit 704, and a switching unit 705.

[0175] Control unit 701 is configured to control the vehicle's power battery to discharge at a first discharge power in response to the vehicle being in motion, wherein the first discharge power is used to indicate the maximum discharge power of the power battery.

[0176] The first acquisition unit 702 is used to acquire the vehicle's required discharge power during the discharge of the power battery at the first discharge power, wherein the required discharge power is used to indicate the discharge power of the power battery required by the vehicle in the driving state.

[0177] The second acquisition unit 703 is used to acquire the duration during which the demand discharge power is greater than the second discharge power in response to the demand discharge power being greater than the second discharge power, wherein the second discharge power is used to indicate the minimum discharge power of the power battery.

[0178] The determining unit 704 is used to determine the target discharge power of the power battery based on the duration and the operating state of the power battery.

[0179] The switching unit 705 is used to switch the discharge power of the power battery from the first discharge power to the target discharge power.

[0180] Optionally, the determining unit 704 may include: a first determining module, configured to determine a target discharge power spectrum corresponding to the power battery based on the duration and the operating state of the power battery, wherein the target discharge power spectrum is used to indicate at least the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, and the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery; and a second determining module, configured to determine the target discharge power in the target discharge power spectrum based on the state of charge and the battery temperature of the power battery.

[0181] Optionally, the determining unit 704 may further include: a third determining module, configured to determine the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum in response to the power battery being in a discharge state and the duration not exceeding a first duration; a fourth determining module, configured to determine the target discharge power spectrum corresponding to the power battery as a second discharge power spectrum in response to the power battery being in a discharge state and the duration exceeding the first duration but less than a second duration; and a fifth determining module, configured to determine the target discharge power of the power battery as a third discharge power spectrum in response to the power battery being in a discharge state and the duration exceeding the second duration.

[0182] Optionally, the determining unit 704 may further include: a sixth determining module, configured to determine the target discharge power spectrum of the power battery as the first discharge power spectrum in response to the vehicle's required discharge power being less than the second discharge power and the duration of the vehicle's required discharge power being less than the second discharge power exceeding a duration threshold, or in response to the power battery being in a charging state; and a control module, configured to control the power battery to discharge based on the first discharge power spectrum.

[0183] Optionally, the determining unit 704 may further include: a seventh determining module, configured to determine the target discharge power spectrum corresponding to the power battery as the first discharge power spectrum in response to the power battery's operating state being a charging state and the duration not exceeding a first duration; and an eighth determining module, configured to determine the target discharge power spectrum corresponding to the power battery as the first discharge power spectrum in response to the power battery's operating state being a charging state and the duration exceeding the first duration but less than a second duration.

[0184] In this embodiment, when the vehicle is in motion, the power battery is first discharged at its maximum discharge power to provide the vehicle with the maximum available discharge capacity. When the actual discharge power required by the vehicle exceeds the minimum discharge power, the target discharge power of the power battery is determined based on the actual discharge power required by the power battery and the battery's operating state. The discharge power of the power battery is then switched to the target discharge power, thereby achieving the goal of flexibly adjusting the discharge power of the power battery according to the actual discharge power required by the vehicle. This achieves the goal of accurately adjusting the discharge power of the power battery, thus solving the technical problem of not being able to accurately adjust the discharge power of the power battery.

[0185] Example 4

[0186] According to an embodiment of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes the power switching method of the power battery in Embodiment 1.

[0187] Example 5

[0188] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program executes the power switching method of the power battery in Embodiment 1.

[0189] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0190] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0191] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0192] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0193] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0194] If the integrated unit is implemented as a software functional unit and sold or used as an independent functional component, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software functional component. This computer software functional component is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0195] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power switching method for a power battery, characterized in that, include: In response to the vehicle being in motion, the vehicle's power battery is controlled to discharge at a first discharge power, wherein the first discharge power is used to indicate the maximum discharge power of the power battery; During the discharge of the power battery according to the first discharge power, the required discharge power of the vehicle is obtained, wherein the required discharge power is used to indicate the discharge power of the power battery required by the vehicle in the driving state. In response to the demanded discharge power being greater than the second discharge power, the duration for which the demanded discharge power is greater than the second discharge power is obtained, wherein the second discharge power is used to indicate the minimum discharge power of the power battery; Based on the duration and the operating state of the power battery, the target discharge power of the power battery is determined. The discharge power of the power battery is switched from the first discharge power to the target discharge power; Determining the target discharge power of the power battery based on the duration and the operating state of the power battery includes: determining a target discharge power spectrum corresponding to the power battery based on the duration and the operating state of the power battery, wherein the target discharge power spectrum is at least used to indicate the mapping relationship between the discharge power of the power battery and the state of charge of the power battery, and the mapping relationship between the discharge power of the power battery and the battery temperature of the power battery; and determining the target discharge power in the target discharge power spectrum based on the state of charge of the power battery and the battery temperature of the power battery. The operating states of the power battery include at least a discharge state and a charging state. Based on the duration and the operating states of the power battery, a target discharge power spectrum corresponding to the power battery is determined, including: in response to the power battery being in the discharge state and the duration not exceeding a first duration, determining the target discharge power spectrum corresponding to the power battery as a first discharge power spectrum; in response to the power battery being in the discharge state and the duration exceeding the first duration but less than a second duration, determining the target discharge power spectrum corresponding to the power battery as a second discharge power spectrum; and in response to the power battery being in the discharge state and the duration exceeding the second duration, determining the target discharge power spectrum of the power battery as a third discharge power spectrum.

2. The method according to claim 1, characterized in that, When the state of charge of the power battery and the battery temperature remain unchanged, the first discharge duration of the power battery discharging according to the discharge power in the first discharge power spectrum is less than the second discharge duration of the power battery discharging according to the discharge power in the second discharge power spectrum, and the second discharge duration is less than the third discharge duration of the power battery discharging according to the discharge power in the third discharge power spectrum.

3. The method according to claim 1, characterized in that, In response to the power battery discharging according to the discharge power in the third discharge power spectrum, or in response to the power battery discharging according to the discharge power in the second discharge power spectrum, the method further includes: In response to the vehicle's required discharge power being less than the second discharge power, and the duration for which the vehicle's required discharge power is less than the second discharge power exceeding a duration threshold, or in response to the power battery being in the charging state, the target discharge power spectrum of the power battery is determined to be the first discharge power spectrum. Based on the first discharge power spectrum, the power battery is controlled to discharge.

4. The method according to claim 1, characterized in that, Based on the duration and the operating state of the power battery, the target discharge power spectrum corresponding to the power battery is determined, including: In response to the fact that the working state of the power battery is the charging state and the duration is not greater than the first duration, the target discharge power spectrum corresponding to the power battery is determined to be the first discharge power spectrum; In response to the power battery's operating state being the charging state, and the duration being greater than the first duration and less than the second duration, the target discharge power spectrum corresponding to the power battery is determined to be the first discharge power spectrum.

5. A power switching device for a power battery, characterized in that, The apparatus for performing the method according to any one of claims 1 to 4, the apparatus comprising: A control unit is configured to control the vehicle's power battery to discharge at a first discharge power in response to the vehicle being in motion, wherein the first discharge power is used to indicate the maximum discharge power of the power battery. The first acquisition unit is configured to acquire the required discharge power of the vehicle during the discharge of the power battery according to the first discharge power, wherein the required discharge power is used to indicate the required discharge power of the power battery of the vehicle in the driving state. The second acquisition unit is configured to acquire the duration during which the required discharge power is greater than the second discharge power in response to the requirement discharge power being greater than the second discharge power, wherein the second discharge power is used to indicate the minimum discharge power of the power battery. A determining unit is used to determine the target discharge power of the power battery based on the duration and the operating state of the power battery. The switching unit is used to switch the discharge power of the power battery from the first discharge power to the target discharge power.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein when the program is run by a processor, it controls the device in which the storage medium is located to perform the method of any one of claims 1 to 4.

7. A processor, characterized in that, The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 4 when it runs.

8. A vehicle, characterized in that, The vehicle is used to perform the method according to any one of claims 1 to 4.

Images