WO2024000107A1

WO2024000107A1 - Battery charging method and charging apparatus

Info

Publication number: WO2024000107A1
Application number: PCT/CN2022/101567
Authority: WO
Inventors: 陈伟峰; 何乐为; 王霞
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2024-01-04

Abstract

Provided in the embodiments of the present application are a battery charging method and a charging apparatus. The charging method is applied to a battery swap station. The charging method comprises: when the price of electricity is at a peak period, charging a battery in a battery swap station according to a first threshold value, or when the price of electricity is at a valley period, charging the battery in the battery swap station according to a second threshold value, wherein the first threshold value is less than the second threshold value. The charging method and the charging apparatus in the embodiments of the present application facilitate reducing the charging cost of the battery swap station, thus reducing the operation cost of the battery swap station.

Description

Battery charging methods and charging devices

Technical field

The embodiments of the present application relate to the field of battery technology, and in particular, to a battery charging method and charging device.

Background technique

With the development of new energy technology, the application fields of batteries are becoming more and more extensive, such as providing power to or supplying power to electrical devices.

When the power of the battery in the electrical device is insufficient to support the operation of the electrical device, the charging device can be used to charge the electrical device, that is, the battery in the electrical device is charged to realize the cycle of charging and discharging the battery. . However, it takes a long time to charge the battery. During the charging period, the electrical device cannot operate, which brings great inconvenience to the user.

In order to improve user experience, battery replacement technology came into being. The electric device can replace the battery with insufficient power with a battery with sufficient power in the power swap station. The battery with insufficient power can be charged in the power swap station. The charged battery can be used as an electric device for subsequent battery replacement at the power swap station. Replacement battery.

How to reduce the charging cost of batteries in battery swap stations is an urgent problem that needs to be solved.

Contents of the invention

In view of this, embodiments of the present application provide a battery charging method and a charging device, which are beneficial to reducing the charging cost of the power swap station, thereby reducing the operating cost of the power swap station.

In a first aspect, a battery charging method is provided, which is applied in a power swap station. The charging method includes: when the electricity price is in a peak period, charging the battery in the power swap station according to a first threshold, or charging the battery in the power swap station. When the electricity price is in a trough period, the battery in the power swap station is charged according to the second threshold; wherein the first threshold is smaller than the second threshold.

In this embodiment, when the electricity price is in the peak period, the battery in the power swap station can be charged according to a smaller threshold, which is beneficial to allowing the power swap station to quickly reach the usable state of the power swap station at the minimum cost. When the electricity price is at In the case of the trough period, the battery in the power swap station can be charged according to a larger threshold, which is conducive to the power swap station reaching the maximum profit state of the power swap station at the lowest cost. That is, the charging method 20 provided in the embodiment of the present application is conducive to saving money. Operating costs of battery swap stations.

In a possible implementation, charging the battery in the power swap station according to the first threshold when the electricity price is in the peak period includes: charging the battery in the power swap station when the electricity price is in the peak period. A battery whose state of charge SOC is less than the first threshold is charged to the first threshold.

In this embodiment, when the electricity price is at peak period, batteries with SOC less than the first threshold in the power swap station are charged to the first threshold. Since the first threshold is a smaller threshold, it is beneficial for the power swap station to quickly reach the target with minimum cost. The availability status of the battery swap station.

In a possible implementation, when the electricity price is in the peak period, charging the battery whose state of charge SOC is less than the first threshold in the battery swap station to the first threshold includes: when the electricity price is in the peak period, In this case, based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station, the battery to be charged is determined in the power swap station, and the SOC of the battery to be charged is less than the first threshold; The battery to be charged is charged to the first threshold.

In this embodiment, when the electricity price is in the peak period, the total number of batteries A in the current power swap station and the minimum number of operating batteries B required by the power swap station are combined to determine the batteries to be charged in the power swap station, which is beneficial to The battery swap station can achieve the required minimum number of batteries for operation at the lowest cost possible, ensuring a dynamic balance between operational requirements and operating costs.

In a possible implementation, the battery to be charged is determined in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station, including: when A equals B In this case, it is determined that all batteries with SOC less than the first threshold in the battery swap station are the batteries to be charged.

In this embodiment, when the electricity price is in the peak period, if the total number of batteries A in the current power swap station is equal to the minimum number of operating batteries B required by the power swap station, then all batteries in the power swap station with SOC less than the first threshold will be Charging to the first threshold allows the battery swap station to reach the required minimum number of batteries for operation at a lower cost as much as possible, ensuring a dynamic balance between operational requirements and operating costs.

In a possible implementation, the battery to be charged is determined in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station, including: when A is greater than In the case of B, the battery to be charged is determined in the power swap station based on the number C of batteries with SOC greater than or equal to the first threshold in the power swap station and the minimum number of operating batteries B required by the power swap station.

In this embodiment, when the total number of batteries A in the current power swap station is greater than the minimum number of operating batteries B required by the power swap station, further based on the number C of batteries in the power swap station with SOC greater than or equal to the first threshold and the number of batteries in the power swap station. The relationship between the minimum number of operating batteries B required by the power station and determining the batteries to be charged in the power swap station will help the power swap station reach the usable status of the power swap station as quickly as possible.

In a possible implementation, when A is greater than B, based on the number C of batteries with SOC greater than or equal to the first threshold in the power swap station and the minimum number of operating batteries B required by the power swap station, Determining the battery to be charged in the power swap station includes: when A is greater than B and C is less than B, based on the difference between the SOC of multiple batteries whose SOC is less than the first threshold in the power swap station and the first threshold. The absolute value of the value determines the battery to be charged in the battery swap station, and the plurality of batteries are batteries whose SOC is less than the first threshold.

In this embodiment, when A is greater than B and C is less than B, the battery to be charged may further be determined based on the absolute value of the difference between the SOC of multiple batteries whose SOC is less than the first threshold in the battery swap station and the first threshold. , which is more conducive to making the power swap station reach the usable status of the power swap station as quickly as possible.

In a possible implementation, when A is greater than B and C is less than B, the absolute value of the difference between the SOC of the multiple batteries whose SOC is less than the first threshold in the battery swap station and the first threshold is value, determining the battery to be charged in the battery swap station includes: when A is greater than B and C is less than B, determine the (B-C) battery with the smallest absolute value as the battery to be charged.

In this embodiment, when A is greater than B and C is less than B, the (B-C) battery with the smallest absolute value is determined as the battery to be charged, so that the battery swap station can reach the usable state of the battery swap station as quickly as possible.

In a possible implementation, charging the battery in the power swap station according to the second threshold when the electricity price is in a trough period includes: charging the battery in the power swap station when the electricity price is in a trough period. All batteries whose state of charge SOC is less than the second threshold are charged to the second threshold.

The price of electricity is in a trough period, which means that the price of electricity is cheaper and the cost of charging is lower. At this time, there is no need to make too many judgments, and all batteries with SOC less than the second threshold in the power swap station are directly charged to the second threshold. This can make all batteries in the power swap station reach the replacement level while minimizing the operating cost of the power swap station. Optimal conditions for electricity, thereby providing users with better services.

In a possible implementation, the first threshold is the minimum SOC that allows battery replacement, and the second threshold is the maximum SOC that the battery can charge.

In this embodiment, by setting the first threshold to the minimum SOC that allows battery swapping and the second threshold to the maximum SOC that the battery can charge, a dynamic balance between operational requirements and protective battery conditions can be ensured.

In a possible implementation, the charging method further includes: when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, charging according to the maximum input power of the power swap station. Determine the charging power of each battery to be charged in all the batteries to be charged.

In this embodiment, when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, each battery to be charged in all the batteries to be charged is determined based on the maximum input power of the power swap station. The charging power enables the charging work of the battery swap station to operate safely and normally.

In a possible implementation, when the maximum input power of the battery swap station is less than the sum of the maximum input powers of all batteries to be charged in the battery swap station, all batteries to be charged are determined based on the maximum input power of the battery swap station. The charging power of each battery to be charged in the battery includes: when the maximum input power of the battery swap station is less than the sum of the maximum input powers of all batteries to be charged in the battery swap station, the maximum input power of the battery swap station and the The ratio of the number of all batteries to be charged is determined as the charging power of each battery to be charged.

In this embodiment, when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, charging power is evenly distributed to all batteries to be charged in the power swap station, which can reduce the complexity of charging control. sex.

In a second aspect, a battery charging device is provided, which is used in a power swap station. The charging device includes: a control unit configured to charge the battery in the power swap station according to a first threshold when the electricity price is in a peak period. Charging is performed, or when the electricity price is in a valley period, the battery in the power swap station is charged according to the second threshold; wherein the first threshold is smaller than the second threshold.

In a possible implementation, the control unit is specifically configured to charge the battery whose state of charge SOC is less than the first threshold in the battery swap station to the first threshold when the electricity price is in a peak period.

In a possible implementation, the control unit includes: a determination subunit, configured to determine the number of batteries A required for the minimum operation of the power swap station based on the current total number of batteries A in the power swap station when the electricity price is in a peak period. Number B, a battery to be charged is determined in the power swap station, and the SOC of the battery to be charged is less than the first threshold; a charging subunit is used to charge the battery to be charged to the first threshold.

In a possible implementation, the determination subunit is specifically configured to: when A is equal to B, determine that all batteries in the battery swap station whose SOC is less than the first threshold are the batteries to be charged.

In a possible implementation, the determination subunit is specifically used to: when A is greater than B, based on the number C of batteries with SOC greater than the first threshold in the power swap station and the minimum operation required of the power swap station. The number of batteries B is, and the battery to be charged is determined in the battery swap station.

In a possible implementation, the determination subunit is specifically configured to: when A is greater than B and C is less than B, based on the SOC of multiple batteries whose SOC is less than the first threshold in the power swap station and the first threshold The absolute value of the difference between them determines the battery to be charged in the battery swap station, and the plurality of batteries are batteries whose SOC is less than the first threshold.

In a possible implementation, the determination subunit is configured to: when the difference between A is greater than B and C is less than B is greater than or equal to 1, determine the (B-C) batteries with the smallest absolute value as Battery to be charged.

In a possible implementation, the control unit is specifically configured to: when electricity prices are in a valley period, charge all batteries in the battery swap station whose state of charge SOC is less than the second threshold to the second threshold.

In a possible implementation, the charging device further includes: when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, according to the maximum input power of the power swap station Determine the charging power of each battery to be charged in all the batteries to be charged.

In a possible implementation, when the maximum input power of the power swap station is less than the sum of the maximum input powers of the batteries to be charged in the power swap station, the power exchange station is within the maximum input power of the power swap station. Charging the battery to be charged includes: when the maximum input power of the battery swap station is less than the sum of the maximum input power of all batteries to be charged in the battery swap station, charging the maximum input power of the battery swap station and all batteries to be charged The ratio of the number is determined as the charging power of each battery to be charged.

In a third aspect, a battery charging device is provided. The charging device includes a memory and a processor. The memory is used to store instructions. The processor is used to read the instructions and execute the instructions according to the first aspect and the first aspect thereof. method in any possible implementation.

In a fourth aspect, a chip is provided, including a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the first aspect and any of the possible implementations of the first aspect. Methods.

A fifth aspect provides a computer program, characterized in that the computer program causes the computer to execute the method in the first aspect and any possible implementation manner of the first aspect.

In a sixth aspect, a computer-readable storage medium is provided, which is characterized in that it is used to store a computer program, and the computer program causes the computer to execute the method in the first aspect and any possible implementation manner of the first aspect.

A seventh aspect provides a computer program product, which is characterized by including computer program instructions that enable a computer to execute the method of the first aspect and any possible implementation of the first aspect.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on the drawings without exerting creative efforts.

Figure 1 shows a schematic diagram of a power swap station to which the embodiment of the present application is applicable.

Figure 2 is a schematic block diagram of a battery charging method according to an embodiment of the present application.

FIG. 3 is another schematic block diagram of a battery charging method according to an embodiment of the present application.

Figure 4 is a schematic block diagram of a battery charging device according to an embodiment of the present application.

FIG. 5 is another schematic block diagram of a battery charging device according to an embodiment of the present application.

FIG. 6 is another schematic block diagram of the battery charging device according to the embodiment of the present application.

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

In the description of this application, it should be noted that, unless otherwise stated, "plurality" means more than two; the terms "upper", "lower", "left", "right", "inside", " The orientation or positional relationship indicated such as "outside" is only for the convenience of describing the present application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. Application restrictions. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable error range. "Parallel" is not parallel in the strict sense, but within the allowable error range.

The directional words appearing in the following description are the directions shown in the figures and do not limit the specific structure of the present application. In the description of this application, it should also be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application may be understood based on specific circumstances.

With the development of new energy technology, the application fields of batteries are becoming more and more extensive, such as providing power to or supplying power to electrical devices. For example, the battery can be used as a power source to provide power for the vehicle. When the battery power in the vehicle is not enough to support the continued driving of the vehicle, charging equipment such as charging piles can be used to charge the vehicle, that is, the battery in the vehicle is charged. Achieve battery charging and discharging cycles. However, battery charging takes a long time, which limits the vehicle's endurance.

In order to improve the battery life of vehicles, battery swapping technology came into being. Battery swapping technology adopts the method of "vehicle battery separation", which can provide battery replacement services for vehicles through battery swapping stations, that is, the battery can be quickly removed or installed from the vehicle. The battery removed from the vehicle can be placed in the battery swap cabinet of the battery swap station for charging in preparation for battery swapping for subsequent vehicles entering the battery swap station.

Currently, the charging strategy for batteries entering a battery swap station is to charge the battery once it enters the battery swap station until the battery is fully charged. With the current charging strategy, the operating costs of battery swap stations are relatively high.

In view of this, embodiments of the present application provide a battery charging method that utilizes different periods of peaks and troughs of electricity prices and uses different thresholds to charge batteries in a power swap station, which is beneficial to saving operating costs of the power swap station.

FIG. 1 shows a schematic diagram of an application scenario of the battery charging method according to the embodiment of the present application. As shown in FIG. 1 , the application scenario of the battery charging method may involve a battery swap station 11 , a power consumption device 12 and a battery.

The power swap station 11 may refer to a place that provides power swap services for electrical devices. For example, the power swap station 11 may be a fixed place, or the power swap station 11 may be a movable place such as a mobile power swap device, which is not limited here.

The electrical device 12 can be detachably connected to the battery. In some examples, the electrical device 12 may be a car, a truck, or other vehicle that uses a power battery as a power source. In other examples, the electric device 12 may be as small as a robot, as large as a ship or an airplane, or other devices that use batteries to provide power or power. The embodiment of the present application does not limit the type of the electrical device 12 .

The battery may include a battery disposed in the power consumption device 12 and a battery located in the power swap station 11 for power swapping. For ease of distinction, as shown in FIG. 1 , the battery to be replaced in the electrical device 12 is referred to as battery 141 , and the battery used for power replacement in the power swap station is referred to as battery 142 . The battery may be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel separator battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium-ion battery, etc., and is not limited here. In terms of scale, the battery can be a battery cell, a battery module or a battery pack, which is not limited here. In addition to being used as a power source to supply power to the motor of the electrical device 12 , the battery can also provide power to other electrical devices in the electrical device 12 . For example, the battery can also power an in-car air conditioner, a car player, etc.

When the power-consuming device 12 with the battery 141 installed drives into the power-swapping station 11 , the power-swapping station 11 removes the battery 141 from the power-consuming device 12 through the power-swapping device, takes out the battery 142 from the power-swapping station 11 , and then installs the battery 142 to the electrical device 12. Afterwards, the electrical device 12 with the battery 142 installed can drive away from the power swap station 11 . Through this power exchange technology, power-consuming devices can be quickly replenished with energy within a few minutes or even tens of seconds, improving the user experience.

As shown in FIG. 1 , a power swap cabinet 13 may be provided in the power swap station 11 . The power swap cabinet 13 may be provided with a charging unit 132 and a plurality of charging compartments 133 , and batteries used for power swap may be placed in the charging compartments 133 of the power swap cabinet 13 of the power swap station 11 . The charging unit 132 can charge the battery in the charging compartment 133 . In some examples, the charging unit may include an AC/DC module, that is, an AC/DC module and other components, devices or equipment with a charging function, which is not limited here. The charging unit 132 can be provided in one-to-one correspondence with the charging compartments 133, or multiple charging compartments 133 can share one charging unit 132, which is not limited here.

The electric device 12 can be installed with at least one battery 141. When the electric device 12 is equipped with multiple batteries 141, one battery 141 or multiple batteries 141 in the electric device 12 can be replaced with the battery swap station 11 according to the user's selection. Battery 142 inside.

The power swap station 11 may also be provided with a corresponding management device. The management device may have a centralized structure or a distributed structure, which is not limited here. The management device can be installed inside the power swap station 11 or outside the power swap station 11 . When the management device has a distributed structure, the management device may also be partially installed inside the power swap station 11 and partially outside the power swap station 11 .

Optionally, the power-consuming device 12 can communicate and interact with the management device in the power-swapping station 11 , so that the power-consuming device 12 completes power swapping in the power-swapping station 11 . The management device in the power swap station 11 can also communicate and interact with the power swap cabinet to control the charging of the batteries in the power swap cabinet.

Optionally, the communication interaction between various modules may include wired communication or wireless communication. The wired communication includes, for example, a CAN communication bus. Wireless communication methods include various methods such as Bluetooth communication, WiFi communication, ZigBee communication, etc., and are not limited here.

FIG. 2 shows a schematic block diagram of a battery charging method 20 according to an embodiment of the present application. It should be understood that the power swap station in the charging method 200 may be the power swap station 11 in FIG. 1 , and the battery in the charging method 200 may be the battery 142 placed in the charging compartment 133 in FIG. 1 . The charging method 20 may be executed by the management device in the power swap station 11 , or may be executed by the power swap cabinet 13 in the power swap station 11 . To facilitate understanding, the following will take the management device arranged in the power swap station 11 as the execution subject. Describe the technical solution of this application. As shown in FIG. 2 , the charging method 20 may include some or all of the following contents.

S21. When the electricity price is at the peak period, the management device charges the battery in the power swap station according to the first threshold, or when the electricity price is at the trough period, the management device charges the battery in the power swap station according to the second threshold, where , the first threshold is smaller than the second threshold.

Currently, in order to improve the utilization rate of power resources, the State Grid adopts a charging strategy of peak and valley time-of-use electricity prices. That is, when the electricity price is at the peak period, the electricity price charges are higher; while the electricity price is at the trough period, the electricity price charges are lower.

Optionally, the first threshold and the second threshold may be critical values of the same parameter of the battery. For example, the first threshold and the second threshold are critical values of SOC.

In the embodiment of the present application, when the electricity price is in the peak period, the management device can charge the battery in the power swap station according to a smaller threshold, which is beneficial to allowing the power swap station to quickly reach the usable status of the power swap station at the minimum cost, and When the electricity price is in the trough period, the management device can charge the battery in the power swap station according to a larger threshold, which is beneficial to the power swap station to achieve the maximum profit state of the power swap station at the lowest cost, that is, the charging method provided by the embodiment of the present application 20. It is helpful to save the operating cost of the battery replacement station.

FIG. 3 shows another schematic block diagram of the battery charging method according to the embodiment of the present application.

Optionally, as shown in Figure 3, step S21, that is, when the electricity price is in the peak period, the management device charges the battery in the power swap station according to the first threshold, including: S211, when the electricity price is in the peak period. In this case, the management device charges the battery whose state of charge SOC is less than the first threshold in the battery swap station to the first threshold.

In other words, when the electricity price is in peak period, the management device can first determine the battery to be charged based on the relationship between the SOC of the battery in the battery swap station and the first threshold, and charge the battery to be charged to the first threshold.

In this embodiment, when the electricity price is at peak period, the management device charges the batteries with SOC less than the first threshold in the power swap station to the first threshold. Since the first threshold is a smaller threshold, it is beneficial for the power swap station to charge the battery at the minimum cost. Quickly reach the usable status of the battery swap station.

Optionally, as shown in Figure 3, step S211, that is, when the electricity price is in the peak period, the management device charges the battery whose state of charge SOC is less than the first threshold in the power swap station to the first threshold, including : S212, when the electricity price is in the peak period, the management device determines the battery to be charged in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station. The SOC of the rechargeable battery is less than the first threshold; S213, the management device charges the battery to be charged to the first threshold.

It should be noted that since the batteries in the battery swap station are mobile, the number of batteries in the battery swap station may be different at different times. At a certain moment, the management device can first determine the total number of batteries in the battery swap station, recorded as A. In addition, the minimum number of operating batteries required by the battery swap station can be recorded as B, which means that the battery swap station can support operation only when the current number of batteries in the battery swap station is greater than or equal to B. Optionally, the minimum number of operating batteries B required by the power swap station may be preset according to the operation conditions of the power swap station. For example, assuming that the power swap station can accommodate a total of 60 batteries, but in fact, as long as there are 10 batteries in the power swap station, it can support operation, then the minimum number of batteries required for operation of the power swap station B is 10.

Specifically, when the electricity price is in the peak period, the management device can select all batteries with SOC less than the first threshold from the battery swap station, and further, combine the total number of batteries A in the current battery swap station with the minimum required by the battery swap station. The number of batteries in operation is B, the batteries to be charged in the battery swap station are determined, and the batteries to be charged are charged to the first threshold.

In the embodiment of the present application, when the electricity price is in the peak period, the management device combines the total number of batteries A in the current power swap station and the minimum number of operating batteries B required by the power swap station to determine the batteries to be charged in the power swap station, thereby It is conducive to enabling the battery swap station to achieve the required minimum number of batteries for operation at a lower cost as much as possible, ensuring a dynamic balance between operational requirements and operating costs.

Optionally, as shown in Figure 3, in step S212, the management device determines the battery to be charged in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station. , including: S214, when A is equal to B, the management device determines that all batteries with SOC less than the first threshold in the battery swap station are the batteries to be charged.

It should be noted that, in order for the battery swapping station to meet the operational requirements, in addition to the total number of batteries A in the current battery swapping station required to meet the minimum number of batteries required for operation B, it also includes B batteries required to meet the battery swapping capacity (i.e. reaching the first threshold). ), that is to say, the battery swap station meeting the operational requirements means that the power of at least B batteries in the battery swap station is greater than or equal to the first threshold.

In other words, if the total number of batteries A in the current power swap station is exactly equal to the number of batteries B required to operate the power swap station, the power swap station can at least support operations in terms of the number of batteries. Furthermore, it is also necessary to ensure that the SOC of all batteries in the power swap station should reach above the first threshold, so that the power swap station can be opened to the outside world to meet the vehicle's power swap needs. At this time, all batteries with SOC less than the first threshold in the battery swap station should be charged to the first threshold.

In the embodiment of the present application, when the electricity price is in the peak period, if the total number of batteries A in the current power swap station is equal to the minimum number of operating batteries B required by the power swap station, the management device will set all SOCs in the power swap station to be less than the first The threshold battery is charged to the first threshold, so that the battery swap station can reach the required minimum number of batteries for operation at a lower cost as much as possible, ensuring a dynamic balance between operational requirements and operating costs.

Optionally, as shown in Figure 3, in step S212, the management device determines the number of batteries to be charged in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station. The battery includes: S215. When A is greater than B, the management device determines the number of batteries in the power swap station based on the number C of batteries whose SOC is greater than or equal to the first threshold and the minimum number of batteries required for operation of the power swap station. The battery to be charged is determined in the battery swap station.

Electricity prices are at peak hours, which means that electricity prices are more expensive and charging costs are higher. At this time, if the total number of batteries A in the current power swap station is greater than the minimum number of batteries B required for operation of the power swap station, then it is sufficient to ensure that the power of B batteries in the power swap station reaches the first threshold. That is to say, it is necessary to further determine the number C of batteries with SOC greater than or equal to the first threshold in the battery swap station. If the number C of batteries with SOC greater than or equal to the first threshold in the battery swap station is already greater than or equal to the minimum operation required by the battery swap station, The number of batteries B, then there is no need to charge the batteries in the battery swap station at this time. It is not necessary until the number C of batteries with SOC greater than or equal to the first threshold in the battery swap station is less than the minimum number of batteries B required for operation of the battery swap station. Charge the battery in the battery swap station. And if the number C of batteries with SOC greater than or equal to the first threshold in the power swap station is less than the minimum number of operating batteries B required by the power swap station, then at least (B-C) batteries with SOC less than the first threshold in the power swap station must be selected. The battery is charged until the first threshold.

In this embodiment, when the total number of batteries A in the current power swap station is greater than the minimum number of operating batteries B required by the power swap station, the management device is further based on the number C of batteries in the power swap station with SOC greater than or equal to the first threshold. It is related to the minimum number of operating batteries B required by the battery swap station. Determining the batteries to be charged in the battery swap station is conducive to making the battery swap station reach the usable state of the battery swap station as quickly as possible.

Optionally, as shown in Figure 3, in step S215, that is, in the case where A is greater than B, the management device determines the number C of batteries in the power swap station with SOC greater than or equal to the first threshold and the number of batteries required by the power swap station. The minimum number of operating batteries B, determining the battery to be charged in the power swap station, includes: S216, when A is greater than B and C is less than B, the management device determines the battery to be charged according to the multiple batteries in the power swap station whose SOC is less than the first threshold. The absolute value of the difference between the SOC of each battery in the battery and the first threshold is determined in the battery swap station, and the battery to be charged is determined to be a battery with an SOC smaller than the first threshold.

As mentioned above, if the number C of batteries with SOC greater than or equal to the first threshold in the battery swap station is less than the minimum number of batteries B required for operation of the battery swap station, at least it is necessary to select from batteries with SOC less than the first threshold in the battery swap station ( B-C) batteries are charged. Further, the (B-C) batteries can be determined based on the priorities of all batteries in the battery swap station whose SOC is less than the first threshold. For example, the battery to be charged may be determined based on the SOC ordering from high to low of all batteries with SOC less than the first threshold in the battery swap station. For another example, the battery to be charged may also be determined based on the absolute value of the difference between the SOC and the first threshold of all batteries in the battery swap station whose SOC is less than the first threshold.

In this embodiment, when A is greater than B and C is less than B, the management device may further determine, based on the absolute value of the difference between the SOC of multiple batteries whose SOC is less than the first threshold in the battery swap station and the first threshold, the Rechargeable batteries are more conducive to making the battery swap station reach the usable state of the battery swap station as quickly as possible.

Optionally, as shown in Figure 3, in step S216, that is, when A is greater than B and C is less than B, the management device determines the SOC of multiple batteries whose SOC is less than the first threshold in the power swap station and the first threshold. The absolute value of the difference between them, and determining the battery to be charged in the battery swap station includes: S217. When A is greater than B and C is less than B, the management device determines the (B-C) batteries with the smallest absolute value. This is the battery to be recharged.

As mentioned above, the battery to be charged can be determined from the battery swap station without obtaining the absolute value of the difference between the SOC and the first threshold of multiple batteries in the battery swap station whose SOC is smaller than the first threshold. For example, the (B-C) batteries with the highest SOC among multiple batteries with SOC less than the first threshold in the battery swap station can be directly determined as the batteries to be charged. Specifically, the SOCs of multiple batteries whose SOCs are less than the first threshold in the battery swapping station can be sorted from high to low, and the first (B-C) batteries are determined as the batteries to be charged.

Optionally, in other embodiments, when the electricity price is in peak period, if the total number of batteries A in the current power swap station is less than the minimum number of batteries B required for operation of the power swap station, then the power swap station does not meet the operational requirements, Even if the SOC of all batteries in the battery swap station is greater than or equal to the first threshold, the battery swap station is not enough to support opening to the outside world. At this time, the battery in the battery swap station may not be charged temporarily.

Optionally, as shown in Figure 3, step S21, that is, when the electricity price is in a trough period, the management device charges the battery in the power swap station according to the second threshold, including: S218, when the electricity price is in a trough period. , the management device charges all batteries in the battery swapping station whose state of charge SOC is less than the second threshold to the second threshold.

Optionally, in this embodiment of the present application, the first threshold is the minimum SOC that allows battery replacement, and the second threshold is the maximum SOC that the battery can charge.

For example, the first threshold may be 80% and the second threshold may be 95%. It should be understood that the first threshold and the second threshold can also be other values, and the first threshold and the second threshold can be preset based on experience.

Optionally, as shown in Figure 3, the charging method 20 also includes: S22, in the case where the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, the management device determines The maximum input power of the battery swap station determines the charging power of each battery to be charged among all batteries to be charged.

Specifically, when the maximum input power of the battery swap station is less than the sum of the maximum input powers of all batteries to be charged in the battery swap station, the charging power of each battery to be charged can be determined based on the number of batteries to be charged in the battery swap station. For example, if the number of batteries to be charged in the battery swap station is 1, the maximum input power of the battery swap station can be directly determined as the charging power of the battery to be charged. For another example, if the number of batteries to be charged in the battery swapping station is greater than 1, charging power can be allocated to all batteries to be charged according to the maximum input power of the battery swapping station, that is, the sum of the allocated charging powers of all batteries to be charged is equal to the power of the battery swapping station. Maximum input power.

In this embodiment, when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, the management device determines each of the batteries to be charged based on the maximum input power of the power swap station. The charging power of the rechargeable battery enables the charging work of the battery swap station to operate safely and normally.

Optionally, in this embodiment of the present application, in step S22, that is, when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, the management device The maximum input power determines the charging power of each battery to be charged in all the batteries to be charged, including: S221. When the maximum input power of the battery swap station is less than the sum of the maximum input power of all batteries to be charged in the battery swap station, The management device determines the charging power of each battery to be charged as a ratio of the maximum input power of the power swap station to the number of all batteries to be charged.

Optionally, in other embodiments, when the maximum input power of the battery swap station is less than the sum of the maximum input powers of all batteries to be charged in the battery swap station, the charging power may not be evenly distributed to all batteries to be charged in the battery swap station. , for example, randomly allocating charging power. For another example, the charging power is allocated according to the SOC of all batteries to be charged. For example, a smaller SOC is allocated a larger charging power, and a larger SOC is allocated a smaller charging power. As long as the sum of the allocated charging powers of all batteries to be charged is equal to the maximum input power of the battery swap station, the embodiment of the present application does not limit this.

Optionally, when the maximum input power of the battery swap station is greater than or equal to the sum of the maximum input powers of all batteries to be charged in the battery swap station, each battery to be charged can be charged according to its maximum input power.

The charging method of the battery according to the embodiment of the present application will be described in detail below.

First, each parameter used in this charging method is defined as follows. The total number of batteries that the power swap station can accommodate is N _sum . The minimum number of batteries required for operation of the power swap station is N _min . The total number of batteries in the current power swap station is N _current . The maximum input power of the power swap station is P _maxstation . Each battery The maximum input power is P _maxbettery , and the number of batteries to be charged is N _charge . The SOC of the nth battery is soc(n), the minimum SOC that allows battery swapping is SOC _min , and the maximum SOC that the battery can charge, that is, the ideal working condition SOC is SOC _ideal , which is greater than or equal to the minimum SOC that allows battery swapping. The number is count(soc(n)≥SOC _min ), and the number of batteries less than the ideal operating condition SOC is count(soc(n)≥SOC _ideal ).

Charging strategy when electricity prices are at peak periods:

1. If N _current =0, the battery in the battery swap station will not be charged.

2. If N _current =N _min , and count(soc(n)≥SOC _min )<N _min . Then all batteries with soc(n)＜SOC _min start charging until count(soc(n)≥SOC _min ) reaches N _min .

3. If N _current > N _min , and count(soc(n)≥SOC _min )<N _min .

aN _min -count(soc(n)≥SOC _min )≥1, then sort according to SOC _min -soc(n), select the battery with the smallest difference to charge until count(soc(n)≥SOC _min ) reaches N _min until.

bN _min -count(soc(n)≥SOC _min )≤0, then the battery in the battery swap station does not need to be charged.

During the charging process, if the current number of batteries to be charged is N _charge = 1 and P _maxstation < P _maxbettery , the charging power can be adjusted = P _maxstation ; if the current number of batteries to be charged is N _charge > 1 and P _maxstation <P _maxbettery , then the charging power of each battery to be charged can be adjusted = (P _maxstation /N _charge ); if P _maxstation ≥P _maxbettery , then each battery to be charged is charged with the charging power of P _maxbettery .

Charging strategy when electricity prices are at a trough:

If N _current =0, the battery in the battery swap station will not be charged.

If there are batteries with count(soc(n)≤SOC _ideal )>0, then all batteries with soc(n)≤SOC _ideal will be charged until they are charged to SOC _ideal .

During the charging process, if the current number of batteries to be charged is N _charge = 1, and P _maxstation <P _maxbettery , the charging power can be adjusted = P _maxstation ; if the current number of batteries to be charged is N _charge > 1, and P _maxstation <P _maxbettery , then the charging power of each battery to be charged can be adjusted = (P _maxstation /N _charge ); if P _maxstation ≥ P _maxbettery , then each battery to be charged is charged with the charging power of P _maxbettery .

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

The charging method of the battery according to the embodiment of the present application is described in detail above. The charging method of the battery according to the embodiment of the present application will be described in detail below with reference to FIG. 4 and FIG. 6 . The technical features described in the method embodiments are applicable to the following device embodiments.

FIG. 4 shows a schematic block diagram of a battery charging device 300 according to an embodiment of the present application. As shown in FIG. 4 , the charging device 300 includes some or all of the following contents.

The control unit 310 is configured to charge the battery in the power swap station according to the first threshold when the electricity price is in the peak period, or to charge the battery in the power swap station according to the second threshold when the electricity price is in the trough period. The battery is charged; wherein the first threshold is smaller than the second threshold.

Optionally, in this embodiment of the present application, the control unit 310 is specifically configured to: when the electricity price is in a peak period, charge the battery whose state of charge SOC is less than the first threshold in the power swap station to the first threshold. .

Optionally, as shown in Figure 5, the control unit 310 includes: a determination sub-unit 311, configured to determine, when the electricity price is in a peak period, the current total number of batteries A in the power swap station and the minimum required by the power swap station. The number of operating batteries B is determined to be a battery to be charged in the power swap station, and the SOC of the battery to be charged is less than the first threshold; the charging subunit 312 is used to charge the battery to be charged to the first threshold.

Optionally, in this embodiment of the present application, the determination subunit 311 is specifically configured to: when A equals B, determine that all batteries in the power swap station with SOC less than the first threshold are the batteries to be charged.

Optionally, in this embodiment of the present application, the determination subunit 311 is specifically configured to: when A is greater than B, determine the number of batteries C with SOC greater than the first threshold in the power swap station and the requirements of the power swap station. The minimum number of batteries in operation is B, and the battery to be charged is determined in the battery swap station.

Optionally, in this embodiment of the present application, the determination subunit 311 is specifically configured to: when A is greater than B and C is less than B, based on the SOC of multiple batteries whose SOC is less than the first threshold in the power swap station and the The absolute value of the difference between the first thresholds determines the battery to be charged in the battery swapping station, and the plurality of batteries are batteries whose SOC is less than the first threshold.

Optionally, in the embodiment of the present application, the determination subunit 311 is configured to: when A is greater than B and C is less than B, determine the (B-C) battery with the smallest absolute value as the battery to be charged.

Optionally, in this embodiment of the present application, the control unit 210 is specifically configured to: when the electricity price is in a valley period, charge all batteries in the power swap station whose state of charge SOC is less than the second threshold to the second threshold. threshold.

Optionally, in the embodiment of the present application, the charging device further includes: when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, according to the maximum input power of the power swap station The input power determines the charging power of each of the batteries to be charged.

Optionally, in the embodiment of the present application, when the maximum input power of the power swap station is less than the sum of the maximum input powers of the batteries to be charged in the power swap station, the power exchange station is charged within the maximum input power of the power swap station. Charging the batteries to be charged in the power station includes: when the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, charging the maximum input power of the power swap station and all the batteries to be charged. The ratio of the number of rechargeable batteries is determined as the charging power of each battery to be charged.

It should be understood that the charging device 400 according to the embodiment of the present application can be used to perform the processes in the respective methods of FIG. 2 and FIG. 3. For the sake of brevity, the details will not be described again.

FIG. 6 shows a schematic block diagram of a battery charging device 500 according to an embodiment of the present application. The charging device 500 is used in a power swap station. As shown in Figure 6, the charging device 500 includes a processor 510 and a memory 520, where the memory 520 is used to store instructions, and the processor 510 is used to read instructions and execute the foregoing method based on the instructions. Methods for applying various embodiments.

The memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .

Optionally, as shown in FIG. 6 , the charging device 500 may also include a transceiver 530 , and the processor 510 may control the transceiver 530 to communicate with other devices. Specifically, you can send information or data to other devices, or receive information or data sent by other devices.

Optionally, the embodiment of the present application also provides a chip, including a processor, for calling and running a computer program from the memory, so that the device installed with the chip can execute corresponding steps in the various methods of the embodiment of the present application. The process, for the sake of brevity, will not be repeated here.

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available processors. Programmed logic devices, discrete gate or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the charging device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the charging device in the various methods of the embodiment of the present application. For the sake of simplicity, here No longer.

An embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the charging device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the charging device in the various methods of the embodiment of the present application. For the sake of brevity, they are not mentioned here. Again.

An embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the charging device in the embodiment of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the charging device in the various methods of the embodiment of the present application. For the sake of simplicity, , which will not be described in detail here.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

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

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above are only specific embodiments 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 substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

A battery charging method, characterized in that it is used in a battery swap station, and the charging method includes:

When the electricity price is in peak period, charge the battery in the battery swap station according to the first threshold, or

When the electricity price is in a trough period, charge the battery in the battery swap station according to the second threshold;

Wherein, the first threshold is smaller than the second threshold.
The charging method according to claim 1, characterized in that, when the electricity price is in a peak period, charging the battery in the battery swap station according to the first threshold includes:

When the electricity price is in a peak period, the battery whose state of charge SOC is less than the first threshold in the battery swap station is charged to the first threshold.
The charging method according to claim 2, characterized in that when the electricity price is in a peak period, the battery whose state of charge SOC is less than the first threshold in the battery swap station is charged to the first threshold. ,include:

When the electricity price is in the peak period, the battery to be charged is determined in the power swap station based on the total number of batteries A currently in the power swap station and the minimum number of batteries B required for operation of the power swap station. The SOC of the battery is less than the first threshold;

Charge the battery to be charged to the first threshold.
The charging method according to claim 3, characterized in that, based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station, the method to determine the number of batteries to be used in the power swap station is Rechargeable batteries, including:

When A is equal to B, it is determined that all batteries with SOC less than the first threshold in the battery swap station are the batteries to be charged.
The charging method according to claim 3, characterized in that, based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station, determining the number of batteries in the power swap station. The batteries to be recharged include:

In the case where A is greater than B, based on the number C of batteries with SOC greater than or equal to the first threshold in the power swap station and the minimum number of operating batteries B required by the power swap station, the determination is made in the power swap station. The battery to be recharged.
The charging method according to claim 5, characterized in that when A is greater than B, the charging method is determined according to the number C of batteries with SOC greater than or equal to the first threshold in the power swap station and the number of batteries in the power swap station. The minimum number of batteries B required for operation, and the batteries to be charged in the battery swap station are determined, including:

In the case where A is greater than B and C is less than B, according to the absolute value of the difference between the SOC of a plurality of batteries whose SOC is less than the first threshold in the power swap station and the first threshold, in the power swap station The battery to be charged is determined, and the plurality of batteries are batteries with SOC less than the first threshold.
The charging method according to claim 6, characterized in that when A is greater than B and C is less than B, according to the SOC of a plurality of batteries whose SOC is less than a first threshold in the battery swap station and the first The absolute value of the difference between thresholds, the battery to be charged is determined in the battery swap station, including:

When A is greater than B and C is less than B, the (B-C) batteries with the smallest absolute value are determined as the batteries to be charged.
The charging method according to claim 1, characterized in that, when the electricity price is in a trough period, charging the battery in the power swap station according to the second threshold includes:

When the electricity price is in a trough period, all batteries in the battery swap station whose state of charge SOC is less than the second threshold are charged to the second threshold.
The charging method according to any one of claims 1 to 8, wherein the first threshold is the minimum SOC that allows battery replacement, and the second threshold is the maximum SOC that the battery can be charged to.
The charging method according to any one of claims 1 to 9, characterized in that the charging method further includes:

When the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, each of the batteries to be charged is determined based on the maximum input power of the power swap station. Battery charging power.
The charging method according to claim 10, characterized in that, when the maximum input power of the battery swap station is less than the sum of the maximum input powers of all batteries to be charged in the battery swap station, according to the battery swap station The maximum input power determines the charging power of each battery to be charged in all the batteries to be charged, including:

When the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, the ratio of the maximum input power of the power swap station to the number of all batteries to be charged is determined. is the charging power of each battery to be charged.
A battery charging device, characterized in that it is used in a battery swap station, and the charging device includes:

A control unit configured to charge the battery in the power swap station according to a first threshold when the electricity price is in a peak period, or to charge the battery in the power swap station according to a second threshold when the electricity price is in a trough period. The battery in the battery is charged;

Wherein, the first threshold is smaller than the second threshold.
The charging device according to claim 12, characterized in that the control unit is specifically used for:

When the electricity price is in a peak period, the battery whose state of charge SOC is less than the first threshold in the battery swap station is charged to the first threshold.
The charging device according to claim 13, wherein the control unit includes:

Determination subunit, configured to determine the number of batteries to be charged in the power swap station based on the current total number of batteries A in the power swap station and the minimum number of operating batteries B required by the power swap station when the electricity price is in a peak period. A battery, the SOC of the battery to be charged is less than the first threshold;

A charging subunit is used to charge the battery to be charged to the first threshold.
The charging device according to claim 14, characterized in that the determining subunit is specifically used to:

When A is equal to B, it is determined that all batteries with SOC less than the first threshold in the battery swap station are the batteries to be charged.
The charging device according to claim 14, characterized in that the determining subunit is specifically used to:

In the case where A is greater than B, based on the number C of batteries with SOC greater than the first threshold in the power swap station and the minimum number of operating batteries B required by the power swap station, the power swap station determines the Battery to be charged.
The charging device according to claim 16, characterized in that the determining subunit is specifically used to:

In the case where A is greater than B and C is less than B, according to the absolute value of the difference between the SOC of a plurality of batteries whose SOC is less than the first threshold in the power swap station and the first threshold, in the power swap station The battery to be charged is determined, and the plurality of batteries are batteries with SOC less than the first threshold.
The charging device according to claim 17, characterized in that the determining subunit is configured to:

When the difference between A is greater than B and C is less than B is greater than or equal to 1, the (B-C) battery with the smallest absolute value is determined as the battery to be charged.
The charging device according to claim 12, characterized in that the control unit is specifically used for:

When the electricity price is in a trough period, all batteries in the battery swap station whose state of charge SOC is less than the second threshold are charged to the second threshold.
The charging device according to any one of claims 12 to 19, wherein the first threshold is the minimum SOC that allows battery replacement, and the second threshold is the maximum SOC that the battery can be charged to.
The charging device according to any one of claims 12 to 20, characterized in that the charging device further includes:

When the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, each of the batteries to be charged is determined based on the maximum input power of the power swap station. Battery charging power.
The charging device according to claim 21, wherein when the maximum input power of the battery swap station is less than the sum of the maximum input powers of the batteries to be charged in the battery swap station, Charging the battery to be charged in the battery swap station within the maximum input power includes:

When the maximum input power of the power swap station is less than the sum of the maximum input powers of all batteries to be charged in the power swap station, the ratio of the maximum input power of the power swap station to the number of all batteries to be charged is determined. is the charging power of each battery to be charged.
A battery charging device, characterized in that it is used in a battery swapping station. The charging device includes a memory and a processor. The memory is used to store instructions. The processor is used to read the instructions and execute the instructions according to the instructions. The method as claimed in any one of claims 1 to 11 is carried out.
A chip, characterized in that it includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 11.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 11.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causing the computer to execute the method according to any one of claims 1 to 11.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 11.