CN111106635B - Method and device for determining charging mode - Google Patents

Abstract

The embodiment of the application discloses a method for determining a charging mode, which comprises the steps of determining a to-be-charged amount of a power battery, preset charging time and a charging pile for charging the power battery according to a charging request after the charging request is obtained, and then calculating a first charging time required by charging the power battery by using a first charging mode to finish the to-be-charged amount. Then, judging whether the first charging time is smaller than the preset charging time or not, if so, selecting a first charging mode with faster charging for the user to charge the power battery in order to meet the requirement of the user on the charging time as much as possible; if not, the charging pile can be considered to have enough time for charging the power battery, and at the moment, the second charging mode which is slower to charge is selected as much as possible for charging the power battery in consideration of the influence of quick charging on the service life of the power battery and the charging pile, so that the proper charging mode is automatically selected for a user.

Description

A method and device for determining charging mode

Technical field

The present application relates to the field of power battery charging, and in particular to a method and device for determining a charging mode.

Background technique

In order to save energy and reduce environmental pollution, electric vehicles have been vigorously promoted. At present, due to the limitations of battery capacity and charging infrastructure of electric vehicles, charging problems have become the main problem faced in the development process of electric vehicles.

Since the charging pile for charging the power battery may include a variety of charging methods, it can be divided into DC charging and AC charging according to different charging voltages and charging currents. DC charging can use large current charging greater than 2C, this charging method is called fast charging; AC charging current is generally less than 16A, this charging method is called slow charging. Among them, the slow charge charging method can include 2C slow charge charging method, 1C slow charge charging method, etc. C is the charge and discharge rate, which can represent the charging rate. The size of C can be equal to the ratio of the charge and discharge current to the rated capacity of the power battery. When using a charging pile to charge the power battery of an electric vehicle, the user needs to determine which charging method is provided for the power battery. However, for users, the process of determining the charging method is complicated, and most users do not understand how to choose charging. method, you may blindly pursue the charging speed and choose the fast charging method. In this way, the state of the power battery and the charging capacity of the charging pile may not be able to adapt to the fast charging method, which may affect the service life of the power battery and the safety of electric vehicles and charging piles.

It can be seen that when using the power battery of an electric vehicle at a charging pile to charge, it is particularly important to automatically determine the appropriate charging method for the user.

Contents of the invention

In order to solve the above technical problems, this application provides a method and device for determining a charging method, which can automatically select a suitable charging method for the user. It can automatically select a faster charging method for the user when the preset charging time required by the user is relatively short. The charging method can also automatically select a slower charging method for users when the preset charging time required by the user is relatively long, and on the condition that the user's needs are met, ensuring the service life and safety of the power battery and charging pile.

The embodiments of this application disclose the following technical solutions:

In the first aspect, embodiments of the present application provide a method for determining a charging mode, including:

Get the charging request for the power battery;

The amount to be charged of the power battery, the preset charging time for the amount to be charged, and a charging pile for charging the power battery are determined according to the charging request, wherein the charging pile includes at least a first Charging mode and a second charging mode, the charging rate of the first charging mode is greater than the charging rate of the second charging mode;

Calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged;

Determine whether the preset charging time is less than the first charging time;

If so, determine to use the first charging method to charge the power battery within the preset charging time;

If not, determine to use the second charging method to charge the power battery within the preset charging time.

Optionally, the first charging method is fast charging, and the second charging method is slow charging;

Or, the first charging method is a first type of slow charging, and the second charging method is a second type of slow charging.

Optionally, if the first charging method is fast charging, the second charging method is slow charging, and the slow charging includes a first type of slow charging and a second type of slow charging, and the first type of slow charging The charging rate is greater than the charging rate of the second type of slow charging, and the determining to use the second charging method to charge the power battery within the preset charging time includes:

Calculate the second charging time required to charge the power battery using the second type of slow charge to complete the amount to be charged;

Determine whether the preset charging time is less than the second charging time;

If not, determine to use the second type of slow charge to charge the power battery within the preset charging time;

If so, it is determined based on the preset charging time and the amount to be charged that the first type of slow charging and the second type of slow charging are used to charge the power battery in different time periods of the preset charging time.

Optionally, the method also includes:

Determine whether there is a first time period in which the power grid is in a power grid valley within the preset charging time;

If present, the determination to use the second type of slow charge to charge the power battery within the preset charging time includes:

Within the first time period, it is determined to use the first type of slow charging to charge the power battery;

In a second time period, it is determined to use the second type of slow charging to charge the power battery, and the second time period is a time period in the preset charging time other than the first time period;

Determining to use the first type of slow charging and the second type of slow charging to charge the power battery in different time periods of the preset charging time based on the preset charging time and the amount to be charged includes: :

Within the first time period, it is determined to use the first type of slow charging to charge the power battery;

During the second time period, it is determined that the second type of slow charging is used to charge the power battery.

Optionally, the charging request includes the power information of the power battery, the preset charging time and the identity of the vehicle. The amount to be charged is determined according to the charging request, and the preset amount for the amount to be charged is determined. Assume charging time and charging pile, including: determining the amount to be charged based on the power information of the power battery;

The charging pile is determined from at least one charging pile that is associated with the identity of the vehicle.

Optionally, if there are multiple charging piles that are associated with the identity of the vehicle, determining the charging pile from at least one charging pile that is associated with the identity of the vehicle includes:

According to the grid compliance rate, the charging pile is determined from a plurality of charging piles that are associated with the identity of the vehicle.

Optionally, the method also includes:

Obtain a modification request for the preset charging time, where the modification request includes the charging time to be modified;

The charging time to be modified is used as the preset charging time, and the step of determining whether the preset charging time is less than the first charging time is performed.

In a second aspect, embodiments of the present application provide a device for determining a charging mode, including a first acquisition unit, a first determination unit, a first calculation unit, a first judgment unit, a second determination unit and a third determination unit:

The first acquisition unit is used to acquire a charging request for the power battery;

The first determination unit is used to determine the amount of the power battery to be charged, the preset charging time for the amount to be charged, and the charging pile used to charge the power battery according to the charging request, wherein , the charging pile includes at least a first charging mode and a second charging mode, and the charging rate of the first charging mode is greater than the charging rate of the second charging mode;

The first calculation unit is used to calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged;

The first judgment unit is used to judge whether the preset charging time is less than the first charging time;

The second determining unit is configured to determine, if so, to use the first charging method to charge the power battery within the preset charging time;

The third determining unit is configured to determine, if not, to use the second charging method to charge the power battery within the preset charging time.

Optionally, the first charging method is fast charging, and the second charging method is slow charging;

Or, the first charging method is a first type of slow charging, and the second charging method is a second type of slow charging.

Optionally, if the first charging method is fast charging, the second charging method is slow charging, and the slow charging includes a first type of slow charging and a second type of slow charging, and the first type of slow charging The charging rate is greater than the charging rate of the second type of slow charging, and the third determination unit includes a calculation subunit, a judgment subunit, a first determination subunit and a second determination subunit;

The calculation subunit is used to calculate the second charging time required to charge the power battery using the second type of slow charging to complete the amount to be charged;

The determination subunit is used to determine whether the preset charging time is less than the second charging time;

The first determination subunit is used to determine, if not, to use the second type of slow charging to charge the power battery within the preset charging time;

The second determination subunit is configured to determine, if so, to use the first type of slow charging and the second type of slow charging at different times of the preset charging time based on the preset charging time and the amount to be charged. section to charge the power battery.

Optionally, the device also includes a second judgment unit:

The second judgment unit is used to judge whether there is a first time period in which the power grid is in the power grid valley within the preset charging time;

If present, the first determination subunit is used to determine to use the first type of slow charging to charge the power battery within the first time period;

In a second time period, it is determined to use the second type of slow charging to charge the power battery, and the second time period is a time period in the preset charging time other than the first time period;

The second determination subunit is used to determine to use the first type of slow charging to charge the power battery within the first time period;

During the second time period, it is determined that the second type of slow charging is used to charge the power battery.

Optionally, the charging request includes the power battery's power information, the preset charging time and the vehicle's identity, and the first determining unit is used to determine based on the power battery's power information. The amount to be charged; the charging pile is determined from at least one charging pile that is associated with the identity of the vehicle.

Optionally, if there are multiple charging piles that are associated with the identity of the vehicle, the first determining unit is configured to select from the multiple charging piles that are associated with the identity of the vehicle based on the grid compliance rate. The charging pile is determined among the charging piles.

Optionally, the device also includes a second acquisition unit and a modification unit:

The second obtaining unit is used to obtain a modification request for the preset charging time, where the modification request includes the charging time to be modified;

The modification unit is configured to use the charging time to be modified as the preset charging time, and trigger the first judgment unit to perform the step of judging whether the preset charging time is less than the first charging time.

It can be seen from the above technical solution that if the charging pile has a first charging mode and a second charging mode, the charging rate of the first charging mode is greater than the charging rate of the second charging mode. After obtaining the charging request, the amount to be charged of the power battery, the preset charging time, and the charging pile used to charge the power battery are determined according to the charging request, where the preset charging time is generally determined according to user needs. Then, calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged, and then compare the first charging time with the preset charging time. If the preset charging time is less than The first charging time, in order to meet the user's demand for charging time as much as possible, selects the first charging method with faster charging for the user to charge the power battery; if the preset charging time is not less than the first charging time, it can be considered as charging The pile has sufficient time to charge the power battery. At this time, considering the impact of fast charging on the life and safety of the power battery and the charging pile, you should try to choose a slower second charging method to charge the power battery. It can be seen that this solution automatically selects the appropriate charging method for the user by comprehensively considering factors such as the amount of charge to be charged and the preset charging time. It can automatically select a comparison method for the user when the preset charging time required by the user is relatively short. The fast charging method can also automatically select a slower charging method for users when the preset charging time required by the user is relatively long, and on the condition that the user's needs are met, ensuring the service life and safety of the power battery and charging pile.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1a is a scene example diagram of a method for determining a charging mode provided by an embodiment of the present application;

Figure 1b is a system architecture diagram of a method for determining a charging mode provided by an embodiment of the present application;

Figure 2 is a schematic flowchart of a method for determining a charging mode provided by an embodiment of the present application;

Figure 3 is a schematic flowchart of a method for determining a charging mode provided by an embodiment of the present application;

Figure 4 is a schematic flowchart of a method for determining a charging mode provided by an embodiment of the present application;

Figure 5 is a structural block diagram of a device for determining a charging mode provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application are described below with reference to the accompanying drawings.

The applicant found through research that in a scenario where a user needs to charge the power battery of an electric vehicle, as shown in Figure 1a, the user needs to select a charging pile 102 for the electric vehicle 101, where the charging pile 102 can be a wired charging pile. , or it can be a wireless charging pile. After selecting the charging pile 102, since the charging pile 102 may have multiple charging methods, the user also needs to select a suitable charging method from the multiple charging methods to charge the power battery of the electric vehicle 101.

It is understandable that when users manually choose the charging method, since the process of determining the charging method is complicated, most users do not understand how to choose the appropriate charging method, and may blindly pursue charging speed and choose fast charging. Way. In this way, when fast charging is used to charge the power battery, the voltage and current may be relatively large, causing the power battery to continue to heat up, causing deformation of the power battery, and even reducing the cruising range of the power battery, affecting the use of the power battery. Life span affects the safety of electric vehicles and charging piles.

In order to solve the above problems, in the embodiment of the present application, a suitable charging method can be automatically selected for the user, ensuring that when the preset charging time required by the user is relatively short, a faster charging method is automatically selected for the user. If the charging time is relatively long, within the preset charging time that meets the user's needs, try to automatically select a slower charging method for the user to ensure the service life and safety of the power battery and charging pile.

For example, the method provided by the embodiment of the present application can be applied to the network system as shown in Figure 1b. The network system can include: a vehicle terminal 101, a charging pile 102, a cloud server 103, and a charging pile operator platform. 104. The user's corresponding terminal 105 and the regional power grid load data interface 106.

Among them, the vehicle-mounted terminal 101 can upload the amount to be charged of the battery management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS) and the user's demand for the preset charging time to the cloud server 103 through the network. The network can be, for example, the fifth generation mobile communication technology. (5th-Generation, referred to as 5G).

The charging pile 102 can upload the basic information of the charging pile, the charging method of the charging pile and whether there are foreign objects on the charging pile to the cloud server 103. The charging method of the charging pile can include multiple types. The charging pile 102 may be a wired charging pile or a wireless charging pile.

The cloud server 103 can project the basic information of the charging pile, the determined charging method and real-time charging data to the central control screen on the vehicle through the 5G network. In addition, the cloud server 103 can store the basic information of the charging pile into the charging pile database of the charging pile operator platform 104. The charging pile operator can judge the status of the charging pile based on historical data comparing the basic information of the charging pile, thereby maintaining the charging pile. pile. The charging pile operator can also monitor the charging safety during the charging process in real time through the management browser window of the charging pile operator platform 104, and can also correct the automatically determined charging method according to the browser window.

The user can check the real-time charging status of the power battery through the user's corresponding terminal 105, and can also remotely modify the preset charging time, and can also check and reserve the charging pile 102.

The regional grid load data interface 106 can obtain the grid load and determine whether the grid is in a grid valley based on the grid load, or the regional grid load data interface 106 can directly provide the cloud server 103 with information on the time period when the grid is in a grid valley.

The vehicle-mounted terminal 101 can send a charging request to the cloud server 103, and the cloud server 103 determines the amount of the power battery to be charged, the preset charging time for the amount to be charged, and the charging pile 102 used to charge the power battery according to the charging request. The charging pile 102 at least includes a first charging mode and a second charging mode. The charging rate of the first charging mode is greater than the charging rate of the second charging mode. The cloud server 103 can calculate the first charging time required for the charging pile 102 to charge the power battery using the first charging method to complete the amount to be charged, and compare the first charging time with the preset charging time. If the preset charging time If it is less than the first charging time, use the first charging method to charge the power battery within the preset charging time; if not, use the second charging method to charge the power battery within the preset charging time. In this way, when the preset charging time required by the user is relatively short, a faster charging method is automatically selected for the user. When the preset charging time required by the user is relatively long, the preset charging time that meets the user's needs is automatically selected as much as possible. Users choose a slower charging method to ensure the service life and safety of power batteries and charging piles.

A method for determining a charging mode provided by an embodiment of the present application will be introduced below with reference to the accompanying drawings.

Referring to Figure 2, Figure 2 shows a schematic flow chart of a method for determining a charging mode. The method includes:

S201. Obtain a charging request for the power battery.

When the user needs to charge the vehicle's power battery, the user can send a charging request for the power battery to the cloud server through the vehicle terminal. The charging request may include a preset charging time for the amount to be charged.

The charging request may be sent immediately after the user sets the preset charging time, or may be sent after a period of time after the user sets the preset charging time.

For example, the user arrives at the charging pile at 12:00 and immediately charges the power battery. At this time, the user sets the preset charging time. The preset charging time can be from now to 3:00 pm, for example. Then, the user sets After the preset charging time is completed, the sending of the charging request is triggered.

For another example, when a user may need to charge the vehicle's power battery, in order to ensure that there are free charging piles for the user to use when charging is needed, the user can view and reserve charging piles through the mobile phone client. If the user makes an appointment through the mobile phone client at 12:00 and needs to use a charging pile to charge the power battery from 2:00 pm to 5:00 pm, then the preset charging time can be from 2:00 pm to 5:00 pm.

In this case, when the user sets the preset charging time at 12:00, the charging request can be sent at the same time. Of course, since 12:00 is still some time away from the user's scheduled charging time of 2:00 pm, when the user sets the charging time, the charging request may not be sent, and the charging request may be sent when 2:00 pm is reached.

The charging request may include the amount to be charged of the power battery, the preset charging time, the identity of the charging pile, etc. Alternatively, the charging request may include the power information of the power battery, the preset charging time, the identity of the vehicle, etc.

S202. Determine the amount of the power battery to be charged, the preset charging time for the amount to be charged, and the charging pile used to charge the power battery according to the charging request.

In this embodiment, the charging pile may have multiple charging modes. For example, the charging pile includes a first charging mode and a second charging mode. The charging rate of the first charging mode is greater than the charging rate of the second charging mode.

If the charging request includes the amount of power battery to be charged, the preset charging time, the identity of the charging pile, etc., then the amount to be charged, the preset charging time can be directly obtained from the charging request, and the corresponding information can be obtained based on the identity of the charging pile. Charging pile for charging power batteries. Wherein, the identity of the charging pile may be an identity number (Identity, ID for short).

If the charging request includes the power battery's power information, the preset charging time and the vehicle's identity, the power information can reflect the current power of the power battery and the rated power of the power battery. Then, the amount to be charged can be determined based on the power information of the power battery. For example, the amount to be charged can be the difference between the rated power and the current power. In addition, at least one charging pile that is associated with the vehicle identification can also be determined based on the identity of the vehicle, and then the charging pile for charging the power battery can be determined from the at least one charging pile. Wherein, the identity of the vehicle may be the ID of the vehicle.

It should be noted that when determining a charging pile for a power battery, whether a wireless charging pile or a wired charging pile is used, the location of the charging pile used by the vehicle in the power grid and the remaining power of the vehicle's power battery need to be considered. For the charging pile at position A, everyone is concentrated at this charging pile for charging. Then, the load of the power grid where the charging pile is located is relatively large. At this time, vehicles with relatively large remaining power in the power battery can choose to be in other locations on the grid. charging pile, thereby reducing the load on the charging pile at position A and making the load on the power grid gentler. The location of the charging pile in the power grid affects the grid load rate. Therefore, taking into account the location of the charging pile in the power grid, if there are multiple charging piles associated with the vehicle's identity, it is determined from at least one charging pile. One implementation method of finding a charging pile for charging the power battery may be to determine the charging pile from a plurality of charging piles that are associated with the identity of the vehicle according to the grid compliance rate.

For example, using a wireless charging pile to charge a power battery requires connecting the vehicle and the wireless charging pile through a wireless network, and the wireless network signal may weaken as the distance between the vehicle and the wireless charging pile increases. In order to ensure that the vehicle is connected to the wireless charging pile, There can be strong wireless network signals between charging piles, so that good charging status can be maintained. Generally, it is necessary to choose a charging pile that is close to the vehicle.

S203. Calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged.

For this charging pile, under normal circumstances, the charging rates of various charging modes of the charging pile are known. Then, the charging rate of the first charging mode is known. According to the amount to be charged, the first charging rate can be calculated. time. The first charging time may be a ratio of the amount to be charged and the charging rate of the first charging method.

S204. Determine whether the preset charging time is less than the first charging time. If so, perform S205. If not, perform S206.

S205. Determine to use the first charging method to charge the power battery within the preset charging time.

After the first charging time is calculated, the first charging time can be compared with the preset charging time. If it is determined that the preset charging time is less than the first charging time, it can mean that the preset charging time required by the user is relatively short, and the use of comparison The fastest first charging method still exceeds user needs, but in order to meet user needs as much as possible and complete charging of the power battery as quickly as possible, it is necessary to use the first charging method with a relatively large charging rate to charge the power battery.

S206. Determine to use the second charging method to charge the power battery within the preset charging time.

If it is determined that the preset charging time is not less than the first charging time, it can mean that the preset charging time required by the user is relatively long and the charging pile has sufficient time to charge the power battery. Since a higher charging rate may have a greater impact on the life and safety of the power battery, in order to ensure the life and safety of the power battery, when the charging time is sufficient, the second charging method with a smaller charging rate can be used to charge the power battery.

In the embodiment of the present application, after obtaining the charging request, the amount to be charged of the power battery, the preset charging time, and the charging pile used to charge the power battery are determined according to the charging request, where the preset charging time is determined according to user needs. of. Then, calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged, and then compare the first charging time with the preset charging time. If the preset charging time is less than The first charging time, in order to meet the user's demand for charging time as much as possible, selects the first charging method with faster charging for the user to charge the power battery; if the preset charging time is not less than the first charging time, it can be considered as charging The pile has sufficient time to charge the power battery. At this time, considering the impact of fast charging on the life and safety of the power battery and the charging pile, you should try to choose a slower second charging method to charge the power battery. It can be seen that this solution automatically selects the appropriate charging method for the user by comprehensively considering factors such as the amount of charge to be charged and the preset charging time. It can automatically select a comparison method for the user when the preset charging time required by the user is relatively short. The fast charging method can also automatically select a slower charging method for users when the preset charging time required by the user is relatively long, and on the condition that the user's needs are met, ensuring the service life and safety of the power battery and charging pile.

It is understandable that different charging piles may include different charging methods. Some charging piles may include fast charging and slow charging; some charging piles may not have fast charging capabilities and only include slow charging. Among them, slow charging can include different types of slow charging, such as the first type of slow charging and the second type of slow charging. The first type of slow charge can be, for example, 2C slow charge, and the second type of slow charge can be, for example, 1C slow charge. C is the charge and discharge rate, which can represent the charging rate. The size of C can be equal to the ratio of the charge and discharge current to the rated capacity of the power battery. .

Therefore, in this embodiment, if the charging pile includes fast charging and slow charging, the first charging method may be fast charging, and the second charging method may be slow charging; if the charging pile only includes slow charging, the first charging method may be the third charging method. The first type of slow charging, the second charging method can be the second type of slow charging.

In some cases, if the first charging method is fast charging and the second charging method is slow charging, and the slow charging includes the first type of slow charging and the second type of slow charging, the charging rate of the first type of slow charging is greater than that of the second type of slow charging. Then, when performing S206, since the second charging method also includes the first type of slow charging and the second type of slow charging, it is also necessary to determine which charging method in the second charging method is specifically used. The power battery is charged.

Referring to Figure 3, Figure 3 shows a schematic flow chart of a method for determining a charging mode. The method includes:

S301. Calculate the second charging time required to charge the power battery using the second type of slow charge to complete the amount to be charged.

When the preset charging time is not less than the first charging time, it means that the charging pile has sufficient time to charge the power battery. At this time, you can try to choose a slower charging method to charge the power battery to ensure the battery's performance. life. Since the charging rate of the second type of slow charging is lower than that of the first type of slow charging, if the second type of slow charging can meet the user's needs, you can choose the second type of slow charging with a slower charging rate. Therefore, the second type of slow charging can first be calculated to charge the power battery and the second charging time required to complete the amount to be charged, so as to determine that the second type of slow charging can be used to charge the power battery.

S302. Determine whether the preset charging time is less than the second charging time. If not, execute S303. If yes, execute S304.

S303. Determine to use the second type of slow charging to charge the power battery within the preset charging time.

If it is determined that the preset charging time is not less than the second charging time and using the second type of slow charge to charge the power battery can meet the user's demand for charging time, it can be determined that the second type of slow charging is used during the preset charging time. The power battery is charged.

S304. Determine to use the first type of slow charging and the second type of slow charging to charge the power battery in different time periods of the preset charging time according to the preset charging time and the amount to be charged.

If it is determined that the preset charging time is less than the second charging time, that is, the second charging time to complete the charging using the second type of slow charging has exceeded the preset charging time set by the user, it means that only the second type of slow charging is used for the power battery. Charging cannot meet the user's demand for charging time. In this case, the first type of slow charge needs to be used to charge the power battery within the preset charging time.

It can be understood that the charging rates of the first type of slow charging and the second type of slow charging are known. According to the preset charging time and the amount to be charged, it can be determined that the first type of slow charging and the second type of slow charging are used within the preset charging time. Different time periods of the second type of slow charging, so that the first type of slow charging and the second type of slow charging are used to charge the power battery in different time periods of the preset charging time.

In this embodiment, by comparing the preset charging time and the second charging time, when the preset charging time is large enough, only the second type of slow charging is used, and when the preset charging time is less than the second charging time, the second type of slow charging is used. The first type of slow charging and the second type of slow charging charge the power battery at different time periods of the preset charging time, so as to meet the user's demand for charging time and try to use the second type with a slower charging rate. Class slow charging charges the power battery and protects the service life of the power battery.

It should be noted that the charging pile requires power from the grid to charge the power battery. Since the power supply capacity of the grid is limited, the load of the grid may vary at different times of the day. For example, during the day, various enterprises, factories, residents, etc. may use electricity intensively, and the load on the grid is relatively large, which is the peak period of the grid; while at night, no one often uses electricity, and the load on the grid is relatively small, which is the valley period of the grid. In order to alleviate the power supply pressure of the power grid during the peak period of the power grid, under normal circumstances, electricity is used during the grid valley period, or electricity with a relatively large current is used during the grid valley period.

Therefore, when the preset charging time is less than the first charging time, this embodiment can also determine whether there is a first time period in which the power grid is in the power grid valley within the preset charging time. If there is, the power grid in the first time period will The load is very small. In order to balance the load of the power grid, increase the power consumption during valley hours of the power grid, and at the same time increase the charging rate, S303 may include: within the first time period, determine to use the first type of slow charge to charge the power battery. , during the second time period, it is determined to use the second type of slow charging to charge the power battery, where the second time period is the time period other than the first time period in the preset charging time.

Correspondingly, S304 may include: determining to use the first type of slow charging to charge the power battery during the first time period, and determining to use the second type of slow charging to charge the power battery during the second time period.

The method provided in this embodiment, on the premise of meeting user needs and protecting the life of the power battery, also considers balancing the load of the power grid. When there is a first time period when the power grid is in the power grid valley during the preset charging time, in the first time period The first type of slow charging with a larger charging rate is used to increase the power consumption during valley hours of the grid to balance the load of the grid and reduce the waste of electricity caused by less power consumption during valley hours.

In some cases, the user may have set a preset charging time, but due to some reasons the user may need to modify the preset charging time. For example, the user originally set the preset charging time from 2:00 pm to 6:00 pm. , however, the user may be temporarily notified and need to go to a certain place to attend a meeting at 4:00 pm. At this time, the user can modify the preset charging time through the mobile client. For example, the preset charging time is from 2:00 pm to 6:00 pm, and the user wants to modify it to 2:00 pm to 4:00 pm.

In this case, the method provided by this embodiment further includes: obtaining a modification request for the preset charging time, the modification request including the charging time to be modified, and using the charging time to be modified as the preset charging time to execute S204.

Take, for example, changing the default charging time from 2:00 pm to 6:00 pm to 2:00 pm to 4:00 pm. The default charging time is 2:00 pm to 6:00 pm, and the charging time needs to be modified. The time is from 2:00 pm to 4:00 pm.

Based on the embodiments provided above, in this embodiment, the first charging method is fast charging, the second charging method is slow charging, and the slow charging includes the first type of slow charging and the second type of slow charging. Among them, the first type of slow charging is 2C slow charging, and the second type of slow charging is 1C slow charging. As an example, the entire process of determining the charging method is introduced.

Referring to Figure 4, Figure 4 shows a schematic flow chart of a method for determining a charging mode. The method includes:

S401. Obtain a charging request for the power battery.

S402. Determine the amount of the power battery to be charged, the preset charging time for the amount to be charged, and the charging pile used to charge the power battery according to the charging request.

S403. Calculate the first charging time required to charge the power battery using fast charging to complete the amount to be charged.

S404. Determine whether the preset charging time is less than the first charging time. If yes, execute S405. If not, execute S406.

S405. Determine to use fast charging to charge the power battery within the preset charging time.

S406. Calculate the second charging time required to charge the power battery using 1C slow charging to complete the amount to be charged.

S407. Determine whether there is a first time period in which the power grid is in a power grid valley within the preset charging time. If it exists, execute S408. If it does not exist, execute S411.

S408: Determine whether the preset charging time is less than the second charging time. If not, execute S409. If yes, execute S410.

S409. In the first time period, it is determined to use 2C slow charging to charge the power battery, and in the second time period, it is determined to use 1C slow charging to charge the power battery.

S410: Try to arrange charging in the first time period, and determine to use 2C slow charging to charge the power battery in the first time period, and determine to use 1C slow charging to charge the power battery in the second time period.

S411. Try to use 1C slow charge to charge the power battery within the preset charging time.

It can be seen that this solution automatically selects the appropriate charging method for the user by comprehensively considering factors such as the amount of charge to be charged and the preset charging time. It can automatically select a comparison method for the user when the preset charging time required by the user is relatively short. The fast charging method can also automatically select a slower charging method for users when the preset charging time required by the user is relatively long, and on the condition that the user's needs are met, ensuring the service life and safety of the power battery and charging pile.

Based on the above-mentioned method for determining a charging mode, an embodiment of the present application provides a device for determining a charging mode, including a first obtaining unit 501, a first determining unit 502, a first calculating unit 503, and a first judging unit 504 , the second determination unit 505 and the third determination unit 506:

The first obtaining unit 501 is used to obtain a charging request for the power battery;

The first determining unit 502 is configured to determine the amount of the power battery to be charged, the preset charging time for the amount to be charged, and the charging pile used to charge the power battery according to the charging request, Wherein, the charging pile includes at least a first charging mode and a second charging mode, and the charging rate of the first charging mode is greater than the charging rate of the second charging mode;

The first calculation unit 503 is used to calculate the first charging time required to charge the power battery using the first charging method to complete the amount to be charged;

The first judgment unit 504 is used to judge whether the preset charging time is less than the first charging time;

The second determining unit 505 is configured to determine, if yes, to use the first charging method to charge the power battery within the preset charging time;

The third determining unit 506 is configured to determine, if not, to use the second charging method to charge the power battery within the preset charging time.

Optionally, the first charging method is fast charging, and the second charging method is slow charging;

Or, the first charging method is a first type of slow charging, and the second charging method is a second type of slow charging.

Optionally, if the first charging method is fast charging, the second charging method is slow charging, and the slow charging includes a first type of slow charging and a second type of slow charging, and the first type of slow charging The charging rate is greater than the charging rate of the second type of slow charging, and the third determination unit includes a calculation subunit, a judgment subunit, a first determination subunit and a second determination subunit;

The calculation subunit is used to calculate the second charging time required to charge the power battery using the second type of slow charging to complete the amount to be charged;

The determination subunit is used to determine whether the preset charging time is less than the second charging time;

The first determination subunit is used to determine, if not, to use the second type of slow charging to charge the power battery within the preset charging time;

The second determination subunit is configured to determine, if so, to use the first type of slow charging and the second type of slow charging at different times of the preset charging time based on the preset charging time and the amount to be charged. section to charge the power battery.

Optionally, the device also includes a second judgment unit:

The second judgment unit is used to judge whether there is a first time period in which the power grid is in the power grid valley within the preset charging time;

If present, the first determination subunit is used to determine to use the first type of slow charging to charge the power battery within the first time period;

In a second time period, it is determined to use the second type of slow charging to charge the power battery, and the second time period is a time period in the preset charging time other than the first time period;

The second determination subunit is used to determine to use the first type of slow charging to charge the power battery within the first time period;

During the second time period, it is determined that the second type of slow charging is used to charge the power battery.

Optionally, the charging request includes the power battery's power information, the preset charging time and the vehicle's identity, and the first determining unit is used to determine based on the power battery's power information. The amount to be charged; the charging pile is determined from at least one charging pile that is associated with the identity of the vehicle.

Optionally, if there are multiple charging piles that are associated with the identity of the vehicle, the first determining unit is configured to select from the multiple charging piles that are associated with the identity of the vehicle based on the grid compliance rate. The charging pile is determined among the charging piles.

Optionally, the device also includes a second acquisition unit and a modification unit:

The second obtaining unit is used to obtain a modification request for the preset charging time, where the modification request includes the charging time to be modified;

The modification unit is configured to use the charging time to be modified as the preset charging time, and trigger the first judgment unit to perform the step of judging whether the preset charging time is less than the first charging time.

Those of ordinary skill in the art can understand that all or part of the steps to implement the above method embodiments can be completed through hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, the execution includes: The steps of the above method embodiment; and the aforementioned storage medium can be at least one of the following media: read-only memory (English: read-only memory, abbreviation: ROM), RAM, magnetic disk or optical disk, etc., which can store The medium for program code.

It should be noted that each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. at. In particular, the device and system embodiments are described simply because they are basically similar to the method embodiments. For relevant details, please refer to the partial description of the method embodiments. The device and system embodiments described above are only illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in One location, or it can be distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Persons of ordinary skill in the art can understand and implement the method without any creative effort.

The above is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present application. Replacements shall be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (6)

1. A method for determining a charging mode, comprising:

acquiring a charging request for a power battery;

determining a to-be-charged amount of the power battery, a preset charging time aiming at the to-be-charged amount and a charging pile for charging the power battery according to the charging request, wherein the charging pile at least comprises a first charging mode and a second charging mode, and the charging rate of the first charging mode is larger than that of the second charging mode;

calculating a first charging time required by the power battery to be charged by using the first charging mode to finish the charging to be charged;

judging whether the preset charging time is smaller than the first charging time or not;

if yes, determining to charge the power battery in the preset charging time by using the first charging mode;

if not, determining to charge the power battery in the preset charging time by using the second charging mode;

the first charging mode is quick charging, and the second charging mode is slow charging; or the first charging mode is a first type slow charging mode, and the second charging mode is a second type slow charging mode;

If the first charging mode is fast charging, the second charging mode is slow charging, and the slow charging includes a first type slow charging and a second type slow charging, a charging rate of the first type slow charging is greater than a charging rate of the second type slow charging, and the determining to charge the power battery in the preset charging time by using the second charging mode includes: calculating a second charging time required by the power battery to be charged by using the second type of slow charging; judging whether the preset charging time is smaller than the second charging time or not; if not, determining to charge the power battery by using the second type of slow charge within the preset charging time; if so, determining to charge the power battery in different time periods of the preset charging time by using the first type of slow charging and the second type of slow charging according to the preset charging time and the to-be-charged quantity.

2. The method according to claim 1, wherein the method further comprises:

judging whether a first time period of the power grid in the power grid valley exists in the preset charging time or not;

if so, the determining to charge the power battery using the second type of slow charge within the preset charging time includes:

Determining to charge the power battery using the first type of slow charge during the first period of time;

determining to charge the power battery by using the second type of slow charge in a second time period, wherein the second time period is a time period except the first time period in the preset charging time;

the determining to charge the power battery according to the preset charging time and the to-be-charged amount by using different time periods of the first type slow charging and the second type slow charging in the preset charging time includes:

determining to charge the power battery using the first type of slow charge during the first period of time;

and in the second time period, determining to charge the power battery by using the second type of slow charge.

3. The method according to claim 1, wherein the charging request includes the power information of the power battery, the preset charging time and the identity of the vehicle, and the determining the to-be-charged amount, the preset charging time for the to-be-charged amount, and the charging pile according to the charging request includes: determining the to-be-charged amount according to the electric quantity information of the power battery;

And determining the charging pile from at least one charging pile with an association relationship with the identity of the vehicle.

4. A method according to claim 3, wherein if the charging pile having an association with the identity of the vehicle includes a plurality of charging piles, the determining the charging pile from at least one charging pile having an association with the identity of the vehicle includes:

and determining the charging piles from a plurality of charging piles which have association relations with the identity of the vehicle according to the power grid load rate.

5. The method according to claim 1, wherein the method further comprises:

acquiring a modification request aiming at the preset charging time, wherein the modification request comprises charging time to be modified;

and taking the charging time to be modified as the preset charging time, and executing the step of judging whether the preset charging time is smaller than the first charging time.

6. The device for determining the charging mode is characterized by comprising a first acquisition unit, a first determination unit, a first calculation unit, a first judgment unit, a second determination unit and a third determination unit:

the first acquisition unit is used for acquiring a charging request for the power battery;

The first determining unit is configured to determine, according to the charging request, a to-be-charged amount of the power battery, a preset charging time for the to-be-charged amount, and a charging pile for charging the power battery, where the charging pile at least includes a first charging mode and a second charging mode, and a charging rate of the first charging mode is greater than a charging rate of the second charging mode;

the first calculating unit is used for calculating a first charging time required by the power battery to be charged by using the first charging mode;

the first judging unit is configured to judge whether the preset charging time is less than the first charging time;

the second determining unit is configured to determine, if yes, that the power battery is charged in the first charging manner within the preset charging time;

the third determining unit is configured to determine, if not, to charge the power battery in the preset charging time by using the second charging mode;

the first charging mode is quick charging, and the second charging mode is slow charging; or the first charging mode is a first type slow charging mode, and the second charging mode is a second type slow charging mode;

If the first charging mode is fast charging, the second charging mode is slow charging, the slow charging comprises a first type slow charging and a second type slow charging, the charging rate of the first type slow charging is larger than that of the second type slow charging, and the third determining unit comprises a calculating subunit, a judging subunit, a first determining subunit and a second determining subunit; the calculating subunit is used for calculating a second charging time required by the power battery to be charged by using the second type of slow charging; the judging subunit is configured to judge whether the preset charging time is less than the second charging time; the first determining subunit is configured to determine, if not, to charge the power battery using the second type of slow charge within the preset charging time; and the second determining subunit is used for determining to charge the power battery by using different time periods of the first type slow charge and the second type slow charge in the preset charging time according to the preset charging time and the to-be-charged amount if the second determining subunit is used for charging the power battery.