Battery power control method, controller and vehicle

Abstract

The application is suitable for the technical field of battery, and provides a battery power control method, a controller and a vehicle. The method determines the power change trend of a fuel cell, and then predicts the power value of the fuel cell based on the power change trend of the fuel cell and the output power of the fuel cell. Then, the required power of a power battery is determined according to the predicted power value of the fuel cell and the total required power. Thus, when the power of the fuel cell changes, the power battery is used as the power supplement of the fuel cell, the total required power is quickly reached, and the power requirement is met. Moreover, when the power battery is used as the power supplement of the fuel cell, the power change characteristics of the fuel cell are fully considered, the target required power of the power battery is accurately obtained based on the power prediction value of the fuel cell, the risk that the output power of the power battery is too large or too small is reduced, and the safety hazard is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery power control method, controller, and vehicle. Background Technology

[0002] With the continuous development of the economy, fuel cells and power batteries have been applied to various fields as power sources. Taking new energy vehicles as an example, a fuel cell is a battery that converts chemical energy into electrical energy. However, the energy conversion process takes time and is greatly affected by operating temperature. Especially when the fuel cell is in a low-temperature operating environment, it cannot quickly respond to the total power demand of the vehicle. In other words, when the output power of the fuel cell differs from the total power demand of the vehicle, the fuel cell cannot quickly reach the total power demand of the vehicle, resulting in insufficient power for the vehicle and affecting its normal operation. Summary of the Invention

[0003] In view of this, embodiments of this application provide a battery power control method, controller, and vehicle to solve the technical problem in the related art that fuel cells cannot quickly respond to the total power demand, resulting in insufficient power.

[0004] In a first aspect, embodiments of this application provide a battery power control method, including:

[0005] Obtain the total power demand, and determine the power change trend of the fuel cell based on the total power demand and the fuel cell output power;

[0006] Based on the power change trend and the output power of the fuel cell, the predicted power value of the fuel cell is obtained;

[0007] Based on the predicted power value and the total power demand, the target power demand of the power battery is determined, and the power battery is controlled to charge and discharge based on the target power demand.

[0008] In one possible implementation of the first aspect, obtaining the predicted power value of the fuel cell based on the power change trend and the fuel cell output power includes:

[0009] The power ramp-up / down rate and the preset power change cycle of the fuel cell are obtained;

[0010] The predicted power value of the fuel cell is determined based on the power change trend, the power rise and fall rate, the fuel cell output power, and the power change cycle.

[0011] In one possible implementation of the first aspect, the power change trend includes power ramp-up and power decline, the power ramp-up rate includes power ramp-up rate and power decline rate, and the power prediction value of the fuel cell includes a first power prediction value and a second power prediction value, wherein the power ramp-up rate is determined based on the operating temperature of the fuel cell;

[0012] The step of determining the predicted power value of the fuel cell based on the power change trend, the power increase / decrease rate, the fuel cell output power, and the power change cycle includes:

[0013] If the power change trend is a power ramp-up, then the first power prediction value is determined based on the power ramp-up rate, the fuel cell output power, and the power change cycle.

[0014] If the power change trend is a power decrease, then the second power prediction value is determined based on the power decrease rate, the fuel cell output power, and the power change period.

[0015] In one possible implementation of the first aspect, determining the target power demand of the power battery based on the predicted power value and the total power demand includes:

[0016] Based on the predicted power value and the total power demand, determine whether to perform power compensation;

[0017] If power compensation is determined, the total power demand change value and the fuel cell power change value are determined. Based on the total power demand change value and the fuel cell power change value, the compensation power is determined. Based on the compensation power and the power battery output power, the target power demand of the power battery is determined.

[0018] In one possible implementation of the first aspect, determining the total demand power variation value and the fuel cell power variation value, and determining the compensation power based on the total demand power variation value and the fuel cell power variation value, includes:

[0019] The power increase / decrease rate and preset power change period of the fuel cell are obtained, and the power change value of the fuel cell is determined based on the power increase / decrease rate and the power change period.

[0020] The change in total power demand is determined based on the total power demand and the total power demand at the next moment;

[0021] The compensation power is determined based on the change between the total power demand and the fuel cell power.

[0022] In one possible implementation of the first aspect, before determining the target power requirement of the power battery based on the compensation power and the power battery output power, the method further includes:

[0023] Determine whether the compensation power is greater than the allowable charge and discharge power of the power battery;

[0024] If the compensation power is greater than the allowable charge / discharge power, then the allowable charge / discharge power is used as the compensation power.

[0025] In one possible implementation of the first aspect, the power change trend includes power ramp-up and power drop;

[0026] The step of determining whether to perform power compensation based on the predicted power value and the total power demand includes:

[0027] If the power change trend is a power ramp-up, then when the predicted power value is less than the total required power, power compensation is determined.

[0028] If the power change trend is a decrease in power, then when the predicted power value is greater than the total required power, power compensation is determined.

[0029] In one possible implementation of the first aspect, the power change trend includes power ramp-up;

[0030] The method further includes:

[0031] If the power change trend is a power increase and the operating temperature of the fuel cell is lower than the first preset temperature, then the heating device in the circuit where the fuel cell is located is turned on to heat the fuel cell.

[0032] If the operating temperature of the power battery is lower than the second preset temperature, the heating device in the circuit where the power battery is located is turned on to heat the power battery.

[0033] If the operating temperature of the power battery is higher than the third preset temperature, the cooling device of the circuit where the power battery is located will be turned on to cool down the power battery.

[0034] Wherein, the first preset temperature is greater than the third preset temperature, and the third preset temperature is greater than the second preset temperature.

[0035] In one possible implementation of the first aspect, the power change trend includes power ramp-up and power drop;

[0036] The step of controlling the charging and discharging of the power battery based on the target power demand includes:

[0037] If the power change trend is a power ramp-up, then the power battery discharge is controlled based on the target power demand.

[0038] If the power change trend is a decrease in power, then the charging of the power battery is controlled based on the target power demand.

[0039] In one possible implementation of the first aspect, determining the power variation trend of the fuel cell based on the total power demand and the fuel cell output power includes:

[0040] If the total power demand is greater than or equal to the fuel cell output power, then the power change trend of the fuel cell is determined to be power ramp-up.

[0041] If the total power demand is less than the output power of the fuel cell, then the power change trend of the fuel cell is determined to be a power decrease.

[0042] Secondly, embodiments of this application provide a battery power control device, including:

[0043] The determination module is used to obtain the total power demand and determine the power change trend of the fuel cell based on the total power demand and the fuel cell output power.

[0044] The acquisition module is used to obtain the predicted power value of the fuel cell based on the power change trend and the output power of the fuel cell.

[0045] The control module is used to determine the target power demand of the power battery based on the predicted power value and the total power demand, and to control the power battery to charge and discharge based on the target power demand.

[0046] Thirdly, embodiments of this application provide a controller, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the battery power control method as described in any of the first aspects.

[0047] Fourthly, embodiments of this application provide a vehicle including the controller described in the third aspect.

[0048] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0049] The battery power control method, controller, and vehicle provided in this application determine the power change trend of the fuel cell, and then predict the power value of the fuel cell based on the power change trend and the output power of the fuel cell. Subsequently, based on the predicted power value of the fuel cell and the total power demand, the required power of the power battery is determined. Thus, when the power of the fuel cell changes, the power battery is used as a power supplement to the fuel cell to quickly reach the total power demand and meet the power requirements. Moreover, when using the power battery as a power supplement to the fuel cell, the power change characteristics of the fuel cell are fully considered. Based on the predicted power value of the fuel cell, the target power demand of the power battery is accurately obtained, reducing the risk of the power battery output power being too high or too low, and reducing safety hazards.

[0050] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic flowchart of a battery power control method provided in an embodiment of this application;

[0053] Figure 2 This is a schematic flowchart of a battery power control method provided in another embodiment of this application;

[0054] Figure 3 This is a schematic diagram of the structure of a battery power control device provided in an embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the controller provided in one embodiment of this application. Detailed Implementation

[0056] The present application will be described more clearly below with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the function of the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0057] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0058] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0059] In the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0061] Furthermore, the term "multiple" mentioned in the embodiments of this application should be interpreted as two or more.

[0062] When a fuel cell converts chemical energy into electrical energy, this energy conversion process takes time and is significantly affected by operating temperature. Especially when the fuel cell operates in a low-temperature environment, for example, in new energy vehicles, the fuel cell cannot quickly respond to the vehicle's total power demand, leading to insufficient vehicle power and affecting normal operation. In related technologies, the only common approach is to improve the chemical reaction rate of the fuel cell itself to reduce the energy conversion time and thus improve the fuel cell's response speed. However, due to technological limitations, this method is not ideal in improving the fuel cell's response speed.

[0063] Based on the above problems, the inventors discovered through research that power batteries, due to their inherent characteristics, respond quickly to the total power demand, meaning they can quickly reach the required total power. Therefore, power batteries can be used as a supplement to fuel cells. During the process of the fuel cell responding to the total power demand and undergoing power ramp-up or power drop (energy conversion by the fuel cell), the power battery can be controlled to perform charging or discharging to quickly reach the required total power and meet actual needs.

[0064] Furthermore, the inventors discovered that when a power battery supplements a fuel cell, the fuel cell itself operates in a variable power state. If the power battery's output power is calculated based on the fuel cell's current output power, the poor real-time nature of this calculation leads to inaccurate power battery output power, resulting in either excessively high or low output power. This can cause overcharging or over-discharging, posing safety hazards. Therefore, based on the power variation characteristics of the fuel cell and its predicted power value, the inventors obtain the target power requirement of the power battery as its output power. This allows the power battery to quickly reach the required total power while supplementing the fuel cell, avoiding situations where the power battery's output power is too high or too low.

[0065] Figure 1 This is a schematic flowchart of a battery power control method provided in an embodiment of this application. Figure 1 As shown in the embodiments of this application, the method is applied to a controller, and the method may include:

[0066] Step 101: Obtain the total power demand and determine the power change trend of the fuel cell based on the total power demand and the output power of the fuel cell.

[0067] In this embodiment, taking a vehicle as an example, the aforementioned total power requirement can be understood as the power required to meet the current power needs of the vehicle.

[0068] Optionally, in this embodiment, when determining the power change trend of the fuel cell, the power change trend of the fuel cell can be determined as power ramp-up when the total demand power is greater than or equal to the output power of the fuel cell, and the power change trend of the fuel cell can be determined as power decrease when the total demand power is less than the output power of the fuel cell. Thus, based on the different power change trends of the fuel cell, the predicted power value of the fuel cell can be accurately calculated, improving the accuracy of subsequent processing results.

[0069] Step 102: Based on the power change trend and the fuel cell output power, obtain the predicted power value of the fuel cell.

[0070] In this embodiment, the power ramp-up / amplitude rate and a preset power change cycle of the fuel cell can be obtained. Then, based on the aforementioned power change trend, power ramp-up / amplitude rate, fuel cell output power, and power change cycle, a predicted power value for the fuel cell is determined. The power change cycle can be determined based on actual conditions, such as the power change patterns of the fuel cell.

[0071] Optionally, in this embodiment, the power change trend includes power ramp-up and power decrease, the power ramp-up rate includes power ramp-up rate and power decrease rate, and the power prediction value of the fuel cell includes a first power prediction value and a second power prediction value. The power ramp-up rate is determined based on the operating temperature of the fuel cell.

[0072] In one possible implementation, this embodiment may include S1 to S2 when determining the predicted power value of the fuel cell.

[0073] S1. If the power change trend is power ramp-up, then determine the first power prediction value based on the power ramp-up rate, fuel cell output power, and power change cycle.

[0074] S2. If the power change trend is a decrease in power, then determine the second power prediction value based on the power decrease rate, fuel cell output power, and power change cycle.

[0075] As described in relevant technical documents, during the power ramp-up phase, the energy conversion process of a fuel cell is significantly affected by its operating temperature, especially when the fuel cell is operating in a low-temperature range, where it cannot quickly respond to the required total power. Taking a vehicle as an example, the low-temperature operating range is 5℃ to 60℃. Therefore, to accurately calculate the first predicted power value, this embodiment first determines the fuel cell's power ramp-up rate based on the mapping relationship between operating temperature and power ramp-up rate, as well as the fuel cell's current operating temperature. Then, based on the power ramp-up rate and the fuel cell's output power, the first predicted power value is calculated.

[0076] Table 1 below illustrates the mapping relationship between operating temperature and power ramp-up rate. Taking a vehicle as an example, as shown in Table 1, when the operating temperature is greater than or equal to 60℃, the power ramp-up rate is V1. However, when the operating temperature is in the low-temperature operating range, which is the first to fourth temperature range in Table 1, the fuel cell is significantly affected by low temperatures. Therefore, the low-temperature operating range is further divided into different temperature ranges to more accurately determine the power ramp-up rate of the fuel cell. The temperature ranges in the low-temperature operating range can also be divided into other types. Table 1 also shows the mapping relationship between operating temperature and power decay rate.

[0077] It should be noted that from the fourth temperature range to the first temperature range, the temperature ranges are continuous and increase sequentially, and from V5 to V1, the power ramp-up rate increases sequentially.

[0078] Table 1

[0079]

[0080] For example, in determining the first power prediction value, this embodiment can add the product of the power ramp-up rate and the power change period to the fuel cell output power, and use the sum as the first power prediction value.

[0081] Similarly, in this embodiment, when determining the second power prediction value, the difference between the fuel cell output power and the product of the power decrease rate and the power change period can be used as the second power prediction value.

[0082] In this embodiment, based on the power variation characteristics of the fuel cell—namely, its power rise / fall rate and power variation period, as well as its output power—the output power of the fuel cell at the next moment is accurately predicted; this is the predicted power value. Furthermore, based on the relationship between the predicted power value and the total required power, the required power of the power battery can be accurately determined, enabling the power battery to supplement the fuel cell and quickly reach the required total power.

[0083] Step 103: Determine the target power demand of the power battery based on the predicted power value and the total power demand, and control the power battery to charge and discharge based on the target power demand.

[0084] Optionally, in this embodiment, it can first determine whether to perform power compensation based on the above power prediction value and total power demand. If power compensation is required, the target power demand of the power battery is determined. For example, the change value of the total power demand and the change value of the fuel cell power are first determined. Then, the compensation power is determined based on the change value of the total power demand and the change value of the fuel cell power. Based on the compensation power and the output power of the power battery, the target power demand of the power battery is determined.

[0085] For example, in this embodiment, when determining whether to perform power compensation, it can be based on different power change trends. For instance, if the predicted power value is less than the total required power when the power change trend is power increase, then it is determined that power compensation is required. Conversely, if the predicted power value is greater than the total required power when the power change trend is power decrease, then it is determined that power compensation is required.

[0086] In other words, when the power trend is increasing, if the first predicted power value is less than the total required power, it indicates that the fuel cell cannot meet the total required power, and the power battery needs to discharge for power compensation. Conversely, when the power trend is decreasing, if the second predicted power value is greater than the total required power, it indicates that the fuel cell cannot meet the total required power, and the power battery needs to charge for power compensation. Therefore, this embodiment accurately determines whether power battery power compensation is needed by using the relationship between the predicted power value and the total required power, improving the accuracy of subsequent processing.

[0087] In one possible implementation, this embodiment may include A1 to A3 when determining the compensation power based on the total demand power variation and the fuel cell power variation.

[0088] A1. Obtain the power increase / decrease rate and preset power change cycle of the fuel cell, and determine the power change value of the fuel cell based on the power increase / decrease rate and power change cycle of the fuel cell.

[0089] A2. Determine the change in total demand power based on the total demand power and the total demand power at the next moment.

[0090] A3. Determine the compensation power based on the change between the total demand power change and the fuel cell power change.

[0091] Optionally, in this embodiment, the difference between the total power demand at the next moment and the current total power demand is used as the change value of the total power demand. The product of the power increase / decrease rate and the power change period is used as the change value of the fuel cell power. For example, when the power change trend is power ramping, the product of the power ramping rate and the power change period is used as the change value of the fuel cell power; when the power change trend is power decreasing, the product of the power decrease rate and the power change period is used as the change value of the fuel cell power. Furthermore, the difference between the absolute value of the change value of the total power demand and the absolute value of the change value of the fuel cell power is calculated, and this difference is used as the compensation power.

[0092] In other words, this embodiment, after determining the need for power compensation based on the predicted power value, considers the power variation characteristics of the fuel cell and uses the difference between the total demand power variation and the fuel cell power variation—that is, the portion of power that the fuel cell cannot meet—as the compensation power. Therefore, the power that the power battery needs to compensate for can be accurately determined based on this compensation power. Consequently, the power battery compensates to meet the power demand. For example, if the power variation trend is a power ramp-up, and the calculated total demand power variation is 100kW while the fuel cell power variation is 60kW, this indicates that 40kW of power cannot be met by the fuel cell, and the power battery needs to compensate for this 40kW of power.

[0093] It should be noted that the absolute values ​​of the fuel cell power variation and the total power demand variation are taken so that the above-mentioned compensation power calculation method can be applied to both power increase and power decrease trends.

[0094] For example, in this embodiment, when determining the target power requirement of the power battery, the sum of the power battery output power and the compensation power can be used as the target power requirement of the power battery. Then, the output power of the power battery is controlled based on the target power requirement. Here, in calculating the compensation power, this embodiment fully considers the power variation characteristics of the fuel cell, thus the target power requirement of the power battery obtained based on the compensation power is more accurate, avoiding the power battery output power being too high or too low.

[0095] The output power of the power battery is calculated based on the current, voltage, and working time of the power battery.

[0096] For example, in this embodiment, when controlling the charging and discharging of the power battery based on the target demand power, the power battery can be discharged based on the target demand power when the power change trend is power increase, and the power battery can be charged based on the target demand power when the power change trend is power decrease.

[0097] The battery power control method provided in this application first determines the predicted power value of the fuel cell based on the power change trend and output power of the fuel cell. Then, based on the predicted power value, when power compensation is needed, the compensation power is determined based on the total power demand change and the fuel cell power change. Finally, based on the compensation power and the output power of the power battery, the target power demand of the power battery is obtained, and the output power of the power battery is controlled according to the target power demand. Specifically, when the fuel cell power changes, this application embodiment uses the power battery as a power supplement to the fuel cell, performing charge and discharge to compensate for the power difference. This allows for rapid attainment of the total power demand, meeting power requirements. Furthermore, when using the power battery as a power supplement, the power change characteristics of the fuel cell are fully considered, and the compensation power is determined based on the fuel cell power change value. Therefore, the target power demand of the power battery can be accurately obtained, reducing the risk of excessive or insufficient output power from the power battery and minimizing safety hazards.

[0098] Furthermore, as mentioned above, excessive or insufficient output power of the power battery can ultimately lead to overcharging or over-discharging, creating safety hazards. To further avoid overcharging or over-discharging of the power battery, this embodiment can determine whether there is a risk of overcharging or over-discharging before determining the target required power, and if such a risk exists, the compensation power can be adjusted accordingly to avoid overcharging or over-discharging of the power battery.

[0099] Figure 2 This is a schematic flowchart of a battery power control method provided in another embodiment of this application. Figure 2 As shown, the method in the embodiments of this application may include:

[0100] Step 201: Obtain the total power demand and determine the power change trend of the fuel cell based on the total power demand and the output power of the fuel cell.

[0101] Step 202: Based on the power change trend and the fuel cell output power, obtain the predicted power value of the fuel cell.

[0102] Step 203: Based on the predicted power value and the total power demand, determine whether to perform power compensation. If it is determined to perform power compensation, determine the change in total power demand and the change in fuel cell power. Based on the change in total power demand and the change in fuel cell power, determine the compensation power.

[0103] The specific implementation of steps 201 to 203 in this embodiment can be referred to the relevant description in the foregoing embodiment, and will not be repeated here.

[0104] Step 204: Determine whether the compensation power is greater than the allowable charge and discharge power of the power battery. If the compensation power is greater than the allowable charge and discharge power, then the allowable charge and discharge power shall be used as the compensation power.

[0105] The allowable charge / discharge power is the maximum charge / discharge power that the power battery can withstand, based on its output power. This allowable charge / discharge power can be obtained by querying a preset mapping relationship between capacity, operating temperature, and charge / discharge power, using the power battery's current capacity and operating temperature. This preset mapping relationship can be set according to the characteristics of the power battery.

[0106] In this embodiment, when the compensation power exceeds the allowable charge / discharge power (i.e., the compensation power exceeds the allowable charge / discharge power based on the current output power of the power battery), if the target power requirement of the power battery is calculated based on this compensation power and the output power of the power battery is controlled according to the target power requirement, the power battery will be at risk of overcharging or over-discharging. Therefore, after obtaining the compensation power, to avoid overcharging or over-discharging of the power battery in the future, this embodiment takes the smaller of the compensation power and the allowable charge / discharge power of the power battery as the basis for calculating the target power requirement of the power battery. That is, when the compensation power is greater than the allowable charge / discharge power of the power battery, the allowable charge / discharge power of the power battery is used as the compensation power.

[0107] Optionally, when the compensation power is less than or equal to the allowable charge and discharge power of the power battery, this embodiment keeps the compensation power calculated based on the total demand power change value and the fuel cell power change value unchanged.

[0108] Step 205: Based on the compensation power and the output power of the power battery, determine the target power requirement of the power battery, and control the power battery to charge and discharge based on the target power requirement.

[0109] The specific implementation of step 205 in this embodiment can be referred to the relevant description in the foregoing embodiment, and will not be repeated here.

[0110] In this embodiment, before determining the target power requirement, the risk of overcharging or over-discharging of the power battery is first determined based on the compensation power and the allowable charge and discharge power of the power battery. If there is a risk, the compensation power is adjusted accordingly, which can effectively avoid overcharging or over-discharging of the power battery.

[0111] In one possible implementation, this embodiment may further include B1 to B3.

[0112] B1. If the power change trend is power increase and the operating temperature of the fuel cell is lower than the first preset temperature, then control the heating device in the circuit where the fuel cell is located to turn on to heat the fuel cell.

[0113] B2. If the operating temperature of the power battery is lower than the second preset temperature, the heating device in the circuit where the power battery is located will be turned on to heat the power battery.

[0114] B3. If the operating temperature of the power battery is higher than the third preset temperature, the cooling equipment of the circuit containing the power battery will be turned on to cool down the power battery.

[0115] Taking a vehicle as an example, the first preset temperature is higher than the third preset temperature, and the third preset temperature is higher than the second preset temperature. For example, the first preset temperature can be 60℃, the second preset temperature can be 25℃, and the third preset temperature can be 45℃.

[0116] For example, in this embodiment, taking a vehicle as an example, when the fuel cell is in the power ramp-up stage and the operating temperature of the fuel cell is less than 60°C, that is, when the fuel cell is operating in the low-temperature operating range, in order to make the fuel cell heat up as soon as possible and operate in the ideal temperature range, so as to improve the fuel cell's response to the total power demand, the heating device in the circuit where the fuel cell is located can be controlled to heat the fuel cell. For example, the heating device can be a heater and a water pump.

[0117] In this embodiment, by real-time detection of the fuel cell's operating temperature and heating the fuel cell based on that temperature to keep it operating within an ideal temperature range, the fuel cell's response to total power demand can be improved.

[0118] Optionally, when the operating temperature of the power battery is below 25°C, in order to quickly heat up the power battery and ensure it operates within the ideal temperature range, the heating equipment in the circuit containing the power battery can be controlled to heat the power battery. For example, the heating equipment could be a heater or a water pump. When the operating temperature of the power battery is above 45°C, in order to ensure the power battery operates within the ideal temperature range, the cooling equipment in the circuit containing the power battery can be controlled to cool the power battery.

[0119] In this embodiment, the operating temperature of the power battery is detected in real time, and the power battery is heated or cooled based on the operating temperature of the power battery to make it work in the ideal temperature range and reduce the risk of overcharging or over-discharging.

[0120] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0121] Figure 3 This is a schematic diagram of the structure of a battery power control device provided in an embodiment of this application. Figure 3 As shown, the battery power control device provided in this embodiment may include: a determining module 301, an obtaining module 302, and a control module 303.

[0122] The determination module 301 is used to obtain the total power demand and determine the power change trend of the fuel cell based on the total power demand and the output power of the fuel cell.

[0123] The acquisition module 302 is used to obtain the predicted power value of the fuel cell based on the power change trend and the output power of the fuel cell.

[0124] The control module 303 is used to determine the target power demand of the power battery based on the predicted power value and the total power demand, and to control the power battery to charge and discharge based on the target power demand.

[0125] Optionally, the obtaining module 302 is specifically used for:

[0126] The power ramp-up / down rate and the preset power change cycle of the fuel cell are obtained;

[0127] The predicted power value of the fuel cell is determined based on the power change trend, the power rise and fall rate, the fuel cell output power, and the power change cycle.

[0128] Optionally, the power change trend includes power ramp-up and power decrease, the power ramp-up rate includes power ramp-up rate and power decrease rate, and the power prediction value of the fuel cell includes a first power prediction value and a second power prediction value, wherein the power ramp-up rate is determined based on the operating temperature of the fuel cell.

[0129] The obtaining module 302 is specifically used for:

[0130] If the power change trend is a power ramp-up, then the first power prediction value is determined based on the power ramp-up rate, the fuel cell output power, and the power change cycle.

[0131] If the power change trend is a power decrease, then the second power prediction value is determined based on the power decrease rate, the fuel cell output power, and the power change period.

[0132] Optionally, the control module 303 is specifically used for:

[0133] Based on the predicted power value and the total power demand, determine whether to perform power compensation;

[0134] If power compensation is determined, the total power demand change value and the fuel cell power change value are determined. Based on the total power demand change value and the fuel cell power change value, the compensation power is determined. Based on the compensation power and the power battery output power, the target power demand of the power battery is determined.

[0135] Optionally, the control module 303 is specifically used for:

[0136] The power increase / decrease rate and preset power change period of the fuel cell are obtained, and the power change value of the fuel cell is determined based on the power increase / decrease rate and the power change period.

[0137] The change in total power demand is determined based on the total power demand and the total power demand at the next moment;

[0138] The compensation power is determined based on the change between the total power demand and the fuel cell power.

[0139] Optionally, the control module 303 is further configured to:

[0140] Determine whether the compensation power is greater than the allowable charge and discharge power of the power battery;

[0141] If the compensation power is greater than the allowable charge / discharge power, then the allowable charge / discharge power is used as the compensation power.

[0142] Optionally, the control module 303 is specifically used for:

[0143] If the power change trend is a power ramp-up, then when the predicted power value is less than the total required power, power compensation is determined.

[0144] If the power change trend is a decrease in power, then when the predicted power value is greater than the total required power, power compensation is determined.

[0145] Optionally, the control module 303 is further configured to:

[0146] If the power change trend is a power increase and the operating temperature of the fuel cell is lower than the first preset temperature, then the heating device in the circuit where the fuel cell is located is turned on to heat the fuel cell.

[0147] If the operating temperature of the power battery is lower than the second preset temperature, the heating device in the circuit where the power battery is located is turned on to heat the power battery.

[0148] If the operating temperature of the power battery is higher than the third preset temperature, the cooling device of the circuit where the power battery is located will be turned on to cool down the power battery.

[0149] Wherein, the first preset temperature is greater than the third preset temperature, and the third preset temperature is greater than the second preset temperature.

[0150] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0151] Figure 4 This is a schematic diagram of the controller provided in one embodiment of this application. Figure 4 As shown, the controller 400 in this embodiment includes a processor 410 and a memory 420, wherein the memory 420 stores a computer program 421 that can run on the processor 410. When the processor 410 executes the computer program 421, it implements the steps in any of the above method embodiments, for example... Figure 1 Steps 101 to 103 are shown. Alternatively, when processor 410 executes computer program 421, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 3 The functions of modules 301 to 303 are shown.

[0152] For example, computer program 421 may be divided into one or more modules / units, one or more of which are stored in memory 420 and executed by processor 410 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 421 in electronic device 400.

[0153] Those skilled in the art will understand that Figure 4 This is merely an example of an electronic device and does not constitute a limitation on the electronic device. It may include more or fewer components than shown, or combinations of certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0154] The processor 410 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0155] The memory 420 can be an internal storage unit of the electronic device, such as a hard drive or memory, or an external storage device, such as a plug-in hard drive, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card. The memory 420 can also include both internal and external storage units. The memory 420 is used to store computer programs and other programs and data required by the electronic device. The memory 420 can also be used to temporarily store data that has been output or will be output.

[0156] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments 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. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0157] One embodiment of the present invention also provides a vehicle including the controller as described above.

[0158] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0159] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0160] In the embodiments provided by this invention, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only 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 coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0161] 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 network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0162] 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.

[0163] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0164] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A battery power control method, characterized in that, include: Obtain the total power demand, and determine the power change trend of the fuel cell based on the total power demand and the fuel cell output power; Based on the power change trend and the output power of the fuel cell, the predicted power value of the fuel cell is obtained; Based on the predicted power value and the total power demand, the target power demand of the power battery is determined, and the power battery is controlled to charge and discharge based on the target power demand. The power change trend includes power increase and power decrease, and the predicted power value of the fuel cell includes a first predicted power value and a second predicted power value; obtaining the predicted power value of the fuel cell based on the power change trend and the fuel cell output power includes: The power ramp-up rate and preset power change cycle of the fuel cell are obtained; wherein, the power ramp-up rate includes the power ramp-up rate and the power ramp-down rate, and the power ramp-up rate is determined based on the operating temperature of the fuel cell; If the power change trend is a power ramp-up, then the first power prediction value is determined based on the power ramp-up rate, the fuel cell output power, and the power change cycle. If the power change trend is a power decrease, then the second power prediction value is determined based on the power decrease rate, the fuel cell output power, and the power change period.

2. The battery power control method according to claim 1, characterized in that, Determining the target power demand of the power battery based on the predicted power value and the total power demand includes: Based on the predicted power value and the total power demand, determine whether to perform power compensation; If power compensation is determined, the total power demand change value and the fuel cell power change value are determined. Based on the total power demand change value and the fuel cell power change value, the compensation power is determined. Based on the compensation power and the power battery output power, the target power demand of the power battery is determined.

3. The battery power control method according to claim 2, characterized in that, The process of determining the total power demand variation and the fuel cell power variation, and determining the compensation power based on the total power demand variation and the fuel cell power variation, includes: The power increase / decrease rate and preset power change period of the fuel cell are obtained, and the power change value of the fuel cell is determined based on the power increase / decrease rate and the power change period. The change in total power demand is determined based on the total power demand and the total power demand at the next moment; The compensation power is determined based on the change between the total power demand and the fuel cell power.

4. The battery power control method according to claim 2, characterized in that, Before determining the target power requirement of the power battery based on the compensation power and the power battery output power, the method further includes: Determine whether the compensation power is greater than the allowable charge and discharge power of the power battery; If the compensation power is greater than the allowable charge / discharge power, then the allowable charge / discharge power is used as the compensation power.

5. The battery power control method according to claim 2, characterized in that, The power change trend includes power increase and power decrease; The step of determining whether to perform power compensation based on the predicted power value and the total power demand includes: If the power change trend is a power ramp-up, then when the predicted power value is less than the total required power, power compensation is determined. If the power change trend is a decrease in power, then when the predicted power value is greater than the total required power, power compensation is determined.

6. The battery power control method according to any one of claims 1 to 5, characterized in that, The power change trend includes power ramp-up; The method further includes: If the power change trend is a power increase and the operating temperature of the fuel cell is lower than the first preset temperature, then the heating device in the circuit where the fuel cell is located is turned on to heat the fuel cell. If the operating temperature of the power battery is lower than the second preset temperature, the heating device in the circuit where the power battery is located is turned on to heat the power battery. If the operating temperature of the power battery is higher than the third preset temperature, the cooling device of the circuit where the power battery is located will be turned on to cool down the power battery. Wherein, the first preset temperature is greater than the third preset temperature, and the third preset temperature is greater than the second preset temperature.

7. A controller comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the battery power control method as described in any one of claims 1 to 6.

8. A vehicle, characterized in that, Includes the controller as described in claim 7.

Images