WO2021218816A1 - Cell starting method and apparatus, and vehicle - Google Patents

Abstract

A cell starting method and apparatus, and a vehicle. The vehicle comprises a power cell and a fuel cell which are connected. The method comprises the following steps: step 101, obtaining a standard state value, a first output power, and an ambient temperature of the power cell; step 102, determining, according to the standard state value and the ambient temperature, a second output power corresponding to the power cell; and step 103, when the first output power is lower than or equal to the second output power, starting the fuel cell. The present invention is used for solving the problem that the vehicle is broken down and cannot move caused by the fact that a power provided by the power cell is insufficient to start the fuel cell. Further disclosed are a computing processing device, a computer program, and a computer readable medium.

Description

Method, device and vehicle for starting battery

Cross-references to related applications

The present disclosure requires the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 202010367736.8 and titled "A battery startup method, device and vehicle" on April 30, 2020, the entire content of which is incorporated into the present disclosure by reference middle.

Technical field

The present disclosure relates to the field of vehicle power batteries, and in particular to a battery starting method, device and vehicle.

Background technique

In the automotive field, it is customary to refer to vehicles that use hydrogen as fuel as fuel cell electric vehicles (FCEV). According to different power supply configurations, FCEV can be divided into pure fuel cell driven FCEV, fuel cell and power battery combined drive FCEV, fuel cell and super capacitor combined drive FCEV, and fuel cell, power battery and super capacitor combined drive FCEV.

At present, FCEV driven by fuel cell and power battery is widely used. When the state of charge (SOC) of the power battery is lower than 22% (calibrated), the power control unit (Power Control) of the vehicle is required. Unit, PCU) sends a fuel cell start request to the fuel cell system to request the fuel cell system to start driving the vehicle or charge the power battery.

However, starting the fuel cell system requires that the power battery has enough power to drive the fuel cell system’s air compressor and air circulation pumps and other high-voltage components (the fuel cell can be started only when the fuel cell is in working condition). The attenuation is very low or the ambient temperature is low, and the power provided by the power battery at the critical setting value of the current SOC (22%) is not enough to start the fuel cell, causing the vehicle to be unable to move.

Summary of the invention

In view of this, the present disclosure aims to provide a battery starting method, device, and vehicle to solve the problem that the power provided by the current power battery is insufficient to start the fuel cell, which causes the vehicle to be unable to move.

In order to achieve the above objective, the technical solution of the present disclosure is achieved as follows:

In a first aspect, embodiments of the present disclosure provide a battery startup method, which is applied to a vehicle, the vehicle includes a connected power battery and a fuel cell, and the method includes:

Acquiring the standard state value, the first output power and the ambient temperature of the power battery;

Determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature;

When the first output power is less than or equal to the second output power, the fuel cell is started.

Optionally, the determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature includes:

According to the standard state value and the ambient temperature, the second output power is determined by querying a standard state temperature table.

Optionally, after the determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature, the method further includes:

In the case that the first output power is greater than the second output power, return to obtain the real-time standard state value of the power battery, the first output power and the ambient temperature.

Optionally, the first output power is the minimum power corresponding to the power battery when the fuel cell is started.

Optionally, the first output power is the minimum power corresponding to when the state of charge of the power battery is 22% when the fuel cell is started.

In a second aspect, embodiments of the present disclosure provide a battery starting device, which is applied to a vehicle, the vehicle includes a power battery and a fuel cell connected, and the device includes:

An obtaining module, configured to obtain the standard state value, the first output power and the ambient temperature of the power battery;

A determining module, configured to determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature;

The start-up module is configured to start the fuel cell when the first output power is less than or equal to the second output power.

Optionally, the determining module includes:

The determining sub-module is configured to determine the second output power by querying a standard state temperature table according to the standard state value and the ambient temperature.

Optionally, the device further includes:

The return module is configured to return to obtain the real-time standard state value of the power battery, the first output power and the ambient temperature when the first output power is greater than the second output power.

Optionally, the first output power is the minimum power corresponding to the power battery when the fuel cell is started.

In a third aspect, an embodiment of the present disclosure provides a vehicle including the battery starting device described in any of the second aspect.

Compared with the prior art, the embodiments of the present disclosure have the following advantages:

According to the battery startup method provided by the embodiments of the present disclosure, the vehicle can obtain the standard state value of the power battery, the first output power and the ambient temperature, and determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature. When the power is less than or equal to the second output power, the vehicle can start the fuel cell to avoid the problem that the power provided by the power battery cannot support the start of the fuel cell, and to ensure that the fuel cell can be started.

The above description is only an overview of the technical solutions of the present disclosure. In order to understand the technical means of the present disclosure more clearly, they can be implemented in accordance with the content of the specification, and in order to make the above and other objectives, features and advantages of the present disclosure more obvious and easy to understand. In the following, specific embodiments of the present disclosure are specifically cited.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are of the present invention. For some of the disclosed embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The exemplary embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute an improper limitation of the present disclosure. In the attached picture:

FIG. 1 shows a flowchart of the steps of a battery startup method provided in the first embodiment of the present disclosure;

FIG. 2 shows a schematic diagram of a battery system provided by an embodiment of the present disclosure;

FIG. 3 shows a flowchart of the steps of a battery startup method provided in the second embodiment of the present disclosure;

FIG. 4 shows a schematic structural diagram of a battery starting device provided in the third embodiment of the present disclosure;

FIG. 5 schematically shows a block diagram of a computing processing device for executing the method according to the present disclosure; and

Fig. 6 schematically shows a storage unit for holding or carrying program codes for implementing the method according to the present disclosure.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other if there is no conflict.

Fuel Cell Electric Vehicle (FCEV) refers to a vehicle that uses a fuel cell system to generate electricity to power the vehicle. The fuel can include gasoline, natural gas, etc. Fuel cell vehicles can be divided into FCEV driven by pure fuel cell, FCEV driven by fuel cell and power battery, FCEV driven by fuel cell and super capacitor, and FCEV driven by fuel cell, power battery and super capacitor. FCEV. At present, FCEV driven by fuel cell and power battery is widely used. When the state of charge (SOC) of the power battery is lower than 22% (calibrated), the power control unit (Power Control) of the vehicle is required. Unit, PCU) sends a fuel cell start request to the fuel cell system to request the fuel cell system to start driving the vehicle or charge the power battery.

Hereinafter, the present disclosure will be described in detail with reference to the drawings and in conjunction with the embodiments.

1, there is shown a step flow chart of a battery startup method provided by Embodiment 1 of the present disclosure. The battery startup method can be applied to a vehicle, and the vehicle includes a connected power battery and a fuel cell.

As shown in FIG. 1, the battery startup method may specifically include the following steps:

Step 101: Obtain the standard state value, the first output power and the ambient temperature of the power battery.

In the embodiments of the present disclosure, the standard state value refers to the health state value of the power battery, which represents the percentage of the current remaining power of the power battery, and the first output power refers to the minimum power corresponding to the power battery when the fuel cell is started.

The vehicle can obtain the state of health value of the power battery, the first output power of the power battery, and the current temperature of the environment where the power battery is located.

FIG. 2 shows a schematic diagram of a battery system provided by an embodiment of the present disclosure. As shown in FIG. 2, the battery system may include: fuel cell 01, high-pressure hydrogen storage tank (not shown in the figure), power battery 02, DC /DC converter 03, drive motor 04 and vehicle controller 05.

After obtaining the standard state value of the power battery, the first output power and the ambient temperature, step 102 is executed.

Step 102: Determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature.

In the present disclosure, the second output power can be determined by the vehicle by querying the standard state temperature table according to the standard state value and the ambient temperature.

The standard state value and ambient temperature of the power battery and the standard state temperature table corresponding to the state of charge (SOC) of the power battery are shown below. The top row data represents the standard state value (state of health value) of the power battery. One column of data characterizes the ambient temperature, and the remaining data characterizes the SOC of the power battery:

To	100	95	90	85	80	75	70	65	60	55	50
25	twenty two%	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%
20	twenty two%	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%
15	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%	44%
10	26%	28%	30%	32%	34%	36%	38%	40%	42%	44%	46%
0	28%	30%	32%	34%	36%	38%	40%	42%	44%	46%	48%
-5	30%	32%	34%	36%	38%	40%	42%	44%	46%	48%	50%
-10	32%	34%	36%	38%	40%	42%	44%	46%	48%	50%	52%
-15	34%	36%	38%	40%	42%	44%	46%	48%	50%	52%	54%
-20	36%	38%	40%	42%	44%	46%	48%	50%	52%	54%	56%
-25	38%	40%	42%	44%	46%	48%	50%	52%	54%	56%	58%
-30	40%	42%	44%	46%	48%	50%	52%	54%	56%	58%	60%

It should be noted that the SOC in the table is the data that needs to be calibrated, but it can be seen from the above table that the SOC of the power battery corresponding to different temperature and state of health values is different. As the state of health value of the power battery decreases, the output capacity of the power battery will also decrease, and the output power will also become smaller and smaller. Similarly, the lower the ambient temperature, the lower the output power of the power battery.

After determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature, step 103 is executed.

Step 103: When the first output power is less than or equal to the second output power, start the fuel cell.

Optionally, the first output power may be the power corresponding to the SOC of the power battery at 22%. Then, when the first output power is less than or equal to the second output power, the power system control unit (PCU) of the vehicle may start the fuel The battery avoids the problem that the power provided by the power battery cannot support the startup of the fuel cell, and can ensure that the fuel cell can be started.

According to the battery startup method provided by the embodiments of the present disclosure, the vehicle can obtain the standard state value of the power battery, the first output power and the ambient temperature, and determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature. When the power is less than or equal to the second output power, the vehicle can start the fuel cell to avoid the problem that the power provided by the power battery cannot support the start of the fuel cell, and to ensure that the fuel cell can be started.

Referring to FIG. 3, there is shown a step flow chart of a battery starting method provided in the second embodiment of the present disclosure. The battery starting method is applied to a vehicle, and the vehicle includes a connected power battery and a fuel cell.

As shown in FIG. 3, the battery startup method may specifically include the following steps:

Step 201: Obtain the standard state value of the power battery, the first output power and the ambient temperature.

In the embodiments of the present disclosure, the standard state value refers to the health state value of the power battery, which represents the percentage of the current remaining power of the power battery, and the first output power refers to the minimum power corresponding to the power battery when the fuel cell is started.

The vehicle can obtain the state of health value of the power battery, the first output power of the power battery, and the current temperature of the environment where the power battery is located.

Fig. 2 shows a schematic diagram of a battery system provided by an embodiment of the present disclosure. As shown in Fig. 2, the battery system may include: a fuel cell 01, a high-pressure hydrogen storage tank (not shown in the figure), a power battery 02, and a converter 03. It is composed of drive motor 04 and vehicle controller 05.

After obtaining the standard state value of the power battery, the first output power and the ambient temperature, step 202 is executed.

Step 202: Determine the second output power by querying the standard state temperature table according to the standard state value and the ambient temperature.

The standard state value and ambient temperature of the power battery and the standard state temperature table corresponding to the state of charge (SOC) of the power battery are shown below. The top row data represents the standard state value (state of health value) of the power battery. One column of data characterizes the ambient temperature, and the remaining data characterizes the SOC of the power battery:

To	100	95	90	85	80	75	70	65	60	55	50
25	twenty two%	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%
20	twenty two%	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%
15	twenty four%	26%	28%	30%	32%	34%	36%	38%	40%	42%	44%
10	26%	28%	30%	32%	34%	36%	38%	40%	42%	44%	46%
0	28%	30%	32%	34%	36%	38%	40%	42%	44%	46%	48%
-5	30%	32%	34%	36%	38%	40%	42%	44%	46%	48%	50%
-10	32%	34%	36%	38%	40%	42%	44%	46%	48%	50%	52%
-15	34%	36%	38%	40%	42%	44%	46%	48%	50%	52%	54%
-20	36%	38%	40%	42%	44%	46%	48%	50%	52%	54%	56%
-25	38%	40%	42%	44%	46%	48%	50%	52%	54%	56%	58%
-30	40%	42%	44%	46%	48%	50%	52%	54%	56%	58%	60%

It should be noted that the SOC in the table is the data that needs to be calibrated, but it can be seen from the above table that the SOC of the power battery corresponding to different temperatures and state of health values is different. As the state of health value of the power battery decreases, the output capacity of the power battery will also decrease, and the output power will also become smaller and smaller. Similarly, the lower the ambient temperature, the lower the output power of the power battery.

After determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature, step 203 is executed.

Step 203: In the case that the first output power is greater than the second output power, return to the step of obtaining the standard state value of the power battery, the first output power and the ambient temperature.

In the present disclosure, when the first output power of the vehicle is greater than the second output power, the vehicle returns to step 201 to obtain the standard state value of the power battery, the first output power and the ambient temperature, until the first output power is less than or equal to the first output power. 2. In the case of output power, start the fuel cell.

Step 204: When the first output power is less than or equal to the second output power, start the fuel cell.

Optionally, the first output power may be the power corresponding to the SOC of the power battery at 22%. Then, when the first output power is less than or equal to the second output power, the power system control unit (PCU) of the vehicle may start the fuel The battery avoids the problem that the power provided by the power battery cannot support the startup of the fuel cell, and can ensure that the fuel cell can be started.

According to the battery startup method provided by the embodiments of the present disclosure, the vehicle can obtain the standard state value of the power battery, the first output power and the ambient temperature, and determine the second output power by querying the standard state temperature table according to the standard state value and the ambient temperature. In the case that the first output power is greater than the second output power, return to obtain the real-time standard state value of the power battery, the first output power and the ambient temperature, and in the case that the first output power is less than or equal to the second output power, The vehicle can start the fuel cell to avoid the problem that the power provided by the power battery cannot support the start of the fuel cell, which can ensure that the fuel cell can be started.

4, there is shown a schematic structural diagram of a battery starting device provided by the fourth embodiment of the present disclosure. The battery starting device is applied to a vehicle, and the vehicle includes a connected power battery and a fuel cell.

As shown in FIG. 4, the battery startup device 300 may specifically include:

The obtaining module 301 is used to obtain the standard state value, the first output power and the ambient temperature of the power battery;

The determining module 302 is configured to determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature;

The starting module 303 is used to start the fuel cell when the first output power is less than or equal to the second output power.

Optionally, the determining module includes:

The determining sub-module is used to determine the second output power by querying the standard state temperature table according to the standard state value and the ambient temperature.

Optionally, the device further includes:

The return module is used to return to obtain the real-time standard state value of the power battery, the first output power and the ambient temperature when the first output power is greater than the second output power.

Optionally, the first output power is the minimum power corresponding to the power battery when the fuel cell is started.

The specific implementation of the battery startup device in the embodiment of the present disclosure has been described in detail on the method side, so it will not be repeated here.

With the battery starting device provided by the embodiment of the present disclosure, the vehicle can obtain the standard state value, the first output power and the ambient temperature of the power battery through the acquisition module, and determine the corresponding power battery according to the standard state value and the ambient temperature through the determination module. The second output power, and finally through the start module, when the first output power is less than or equal to the second output power, the vehicle can start the fuel cell to avoid the problem that the power provided by the power battery cannot support the start of the fuel cell. The fuel cell was activated.

The embodiment of the present disclosure also provides a vehicle, including the above-mentioned battery starting device.

The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments. Those of ordinary skill in the art can understand and implement it without creative work.

The various component embodiments of the present disclosure may be implemented by hardware, or by software modules running on one or more processors, or by a combination of them. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the computing processing device according to the embodiments of the present disclosure. The present disclosure can also be implemented as a device or device program (for example, a computer program and a computer program product) for executing part or all of the methods described herein. Such a program for realizing the present disclosure may be stored on a computer-readable medium, or may have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

For example, FIG. 5 shows a computing processing device that can implement the method according to the present disclosure. The computing processing device traditionally includes a processor 1010 and a computer program product in the form of a memory 1020 or a computer readable medium. The memory 1020 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. The memory 1020 has a storage space 1030 for executing program codes 1031 of any method steps in the above methods. For example, the storage space 1030 for program codes may include various program codes 1031 respectively used to implement various steps in the above method. These program codes can be read from or written into one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards, or floppy disks. Such a computer program product is usually a portable or fixed storage unit as described with reference to FIG. 6. The storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 1020 in the computing processing device of FIG. 5. The program code can be compressed in an appropriate form, for example. Generally, the storage unit includes computer-readable code 1031', that is, code that can be read by a processor such as 1010, which, when run by a computing processing device, causes the computing processing device to execute the method described above. The various steps.

The “one embodiment”, “an embodiment” or “one or more embodiments” referred to herein means that a specific feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present disclosure. In addition, please note that the word examples "in one embodiment" here do not necessarily all refer to the same embodiment.

In the instructions provided here, a lot of specific details are explained. However, it can be understood that the embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail, so as not to obscure the understanding of this specification.

In the claims, any reference signs placed between parentheses should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of multiple such elements. The present disclosure can be realized by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices may be embodied in the same hardware item. The use of the words first, second, and third, etc. do not indicate any order. These words can be interpreted as names.

Finally, it should be noted that the above are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are all It should be included in the protection scope of the present disclosure.

Claims (13)

1. A battery startup method, characterized in that it is applied to a vehicle, the vehicle includes a connected power battery and a fuel cell, and the method includes:

   Acquiring the standard state value, the first output power and the ambient temperature of the power battery;

   Determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature;

   When the first output power is less than or equal to the second output power, the fuel cell is started.
2. The method according to claim 1, wherein the determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature comprises:

   According to the standard state value and the ambient temperature, the second output power is determined by querying a standard state temperature table.
3. The method according to claim 1, wherein after the determining the second output power corresponding to the power battery according to the standard state value and the ambient temperature, the method further comprises:

   In the case that the first output power is greater than the second output power, return to the step of obtaining the standard state value, the first output power and the ambient temperature of the power battery.
4. The method according to claim 1, wherein the first output power is the minimum power corresponding to the power battery when the fuel cell is started.
5. The method according to claim 4, wherein the first output power is the minimum power corresponding to when the state of charge of the power battery is 22% when the fuel cell is started.
6. A battery starting device, characterized in that it is applied to a vehicle, the vehicle includes a power battery and a fuel cell connected, and the device includes:

   An obtaining module, configured to obtain the standard state value, the first output power and the ambient temperature of the power battery;

   A determining module, configured to determine the second output power corresponding to the power battery according to the standard state value and the ambient temperature;

   The start-up module is configured to start the fuel cell when the first output power is less than or equal to the second output power.
7. The device according to claim 6, wherein the determining module comprises:

   The determining sub-module is configured to determine the second output power by querying a standard state temperature table according to the standard state value and the ambient temperature.
8. The device according to claim 6, wherein the device further comprises:

   The return module is used to return to the step of obtaining the standard state value, the first output power and the ambient temperature of the power battery when the first output power is greater than the second output power.
9. The device according to claim 6, wherein the first output power is the minimum power corresponding to the power battery when the fuel cell is started.
10. A vehicle, characterized by comprising the battery starting device according to any one of claims 6 to 9.
11. A computing processing device, characterized in that it comprises:

    A memory in which computer readable codes are stored; and

    One or more processors, when the computer-readable code is executed by the one or more processors, the computing processing device executes the battery startup method according to any one of claims 1-5.
12. A computer program, comprising computer readable code, when the computer readable code runs on a computing processing device, causes the computing processing device to execute the battery startup method according to any one of claims 1-5.
13. A computer readable medium in which the computer program according to claim 12 is stored.

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