CN117698481A

CN117698481A - Charging method, system and device

Info

Publication number: CN117698481A
Application number: CN202311739449.5A
Authority: CN
Inventors: 李天文; 肖有为; 袁海兵; 江海; 金若愚
Original assignee: GAC Energy Technology Co Ltd
Current assignee: GAC Energy Technology Co Ltd
Priority date: 2023-12-15
Filing date: 2023-12-15
Publication date: 2024-03-15

Abstract

The application provides a charging method, a charging system and a charging device, wherein the charging method comprises the following steps: acquiring the current energy storage unit state of each energy storage unit in the charging system at the current time; classifying the energy storage units in the charging system according to the demand of the energy storage units in the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit; and charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority sequence of each type of energy storage unit. According to the method and the device, the energy storage units are classified according to the current energy storage unit demand and the current energy storage unit state of each energy storage unit, the energy storage units of each type are charged according to the priority ordering of the energy storage units of each type, the energy storage units with short charging time can be charged preferentially, the time that a charging system provides the energy storage unit reaching the upper charging limit is shortened, the energy storage units to be replaced are quickly supplemented, and the charging efficiency is improved.

Description

Charging method, system and device

Technical Field

The present application relates to the field of charging, and in particular, to a charging method, system, and device.

Background

The charging and replacing station is an energy station for providing charging and quick replacement for a power battery of an electric vehicle. At present, a charging power station mainly adopts a mode that charging power is evenly distributed to each energy storage unit to charge each energy storage unit, and charging efficiency is low.

Disclosure of Invention

In view of the foregoing, an object of an embodiment of the present application is to provide a charging method, a charging system and a charging device, which can improve charging efficiency of a charging system.

In a first aspect, an embodiment of the present application provides a charging method, including: acquiring the current energy storage unit state of each energy storage unit in the charging system at the current time; classifying the energy storage units in the charging system according to the demand of the energy storage units in the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit; and charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority sequence of the energy storage units.

In the implementation process, when the energy storage units in the charging system are charged, the energy storage units are classified according to the current energy storage unit demand of the charging system and the current energy storage unit states of all the energy storage units, and the energy storage units of all the types are charged according to the priority ordering of the energy storage units of all the types, so that the energy storage units with short charging time can be charged preferentially, the quantity of the energy storage units reaching the upper charging limit in a shorter time can meet the energy storage unit demand of the charging system at the current time, the energy storage units to be replaced needed in the charging system are quickly replenished, and the charging efficiency of the charging system is improved.

In one embodiment, wherein the current energy storage unit state comprises: a residual amount of electricity; the energy storage units in the charging system are classified according to the demand of the energy storage unit at the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit, and the method comprises the following steps: determining the number of full-power energy storage units of the energy storage units, of which the residual electric quantity reaches the upper charging limit, in the charging system; determining the difference between the required quantity and the quantity of the full-power energy storage units, and determining the difference as the residual required quantity of the energy storage units needing to be charged; classifying the other energy storage units according to the residual demand and the current energy storage unit states of the other energy storage units to obtain various types of energy storage units; the other energy storage units are energy storage units except for the residual electric quantity reaching the upper charging limit in the charging system.

In the implementation process, the electric quantity of the full-power energy storage unit reaches the upper limit of charging, so that the full-power energy storage unit can be preferentially used as the energy storage unit required by the charging system, the quantity of the energy storage units which are charged at first time can be reduced, the time spent on meeting the required quantity of the charging system is reduced, and the power conversion efficiency is improved. In addition, when the number of full-power energy storage units does not meet the demand, the energy storage units except the full-power energy storage units in the charging system are classified, and the energy storage units are charged according to the priority order of the energy storage units of all types, so that the energy storage units with short charging time can be charged preferentially, the number of the energy storage units reaching the upper charging limit in a shorter time can meet the residual demand, the energy storage units to be replaced needed in the charging system are quickly supplemented, and the charging efficiency of the charging system is improved.

In one embodiment, wherein the current energy storage unit state further comprises: abnormal state; the step of classifying the other energy storage units according to the remaining demand and the current energy storage unit state of the other energy storage units to obtain each type of energy storage unit, and the step of: determining that the energy storage unit in the other energy storage units, the current energy storage unit state of which is in an abnormal state, is an abnormal energy storage unit; and determining that the energy storage units except the abnormal energy storage unit in the other energy storage units are chargeable energy storage units.

In the implementation process, the abnormal energy storage unit and the chargeable energy storage unit are determined according to the current energy storage unit state of the energy storage unit. Since the abnormal state is a limited charging of the energy storage unit, the abnormal energy storage unit is also a non-chargeable energy storage unit. That is, other energy storage units are divided into chargeable energy storage units and non-chargeable energy storage units, so that the charging system only charges the chargeable energy storage units, useless charging of abnormal energy storage units is avoided, useless loss of electric quantity of the charging system is reduced, and electric energy utilization rate of the charging system is improved.

In one embodiment, wherein the current energy storage unit state further comprises: abnormal state; before classifying the other energy storage units according to the remaining demand and the current energy storage unit state of the other energy storage units to obtain each type of energy storage unit, the method further includes: acquiring the current module state of each charging module in a charging system at the current time, wherein the current module state comprises the occupied state of a charging terminal; the step of classifying the other energy storage units according to the remaining demand and the current energy storage unit state of the other energy storage units to obtain each type of energy storage unit, and the step of: determining that the energy storage unit in the other energy storage units, the current energy storage unit state of which is in an abnormal state, is an abnormal energy storage unit; determining that the energy storage unit connected with the charging module with the current module state being the occupied state of the charging terminal is an occupied energy storage unit in the other energy storage units; and determining the energy storage units except the abnormal energy storage unit and the occupied energy storage unit in the other energy storage units as chargeable energy storage units.

In the implementation process, the abnormal energy storage unit and the chargeable energy storage unit are determined according to the current energy storage unit state of the energy storage unit, and the occupied energy storage unit is determined according to the current module state of the charging module. Because the abnormal state is that the energy storage unit is limited in charging, the abnormal energy storage unit is also an uncharged energy storage unit, and the charging module of the occupied energy storage unit cannot charge the corresponding energy storage unit and is also an uncharged energy storage unit. That is, other energy storage units are divided into chargeable energy storage units and non-chargeable energy storage units, so that the charging system only charges the chargeable energy storage units, useless charging of abnormal energy storage units is avoided, useless loss of electric quantity of the charging system is reduced, and electric energy utilization rate of the charging system is improved.

In one embodiment, after determining the rechargeable energy storage units, the classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit states of the respective energy storage units to obtain respective types of energy storage units further includes: determining the charging time required to be consumed by each energy storage unit in the chargeable energy storage units when the energy storage unit reaches the upper charging limit according to the to-be-charged amount of each energy storage unit in the chargeable energy storage units and the maximum charging power of corresponding charging equipment; sequencing the charging time from short to long; and determining the set number of the energy storage units which are arranged at the front as the energy storage units to be charged, wherein the set number is the residual demand.

In the implementation process, after the chargeable energy storage units are determined, the charging time required to be consumed for each energy storage unit in the chargeable energy storage units to reach the upper charging limit is determined, and the energy storage units with the front residual demand quantity from short to long according to the charging time are determined as the primary charging energy storage units, so that the energy storage units in the primary charging energy storage units are charged preferentially, the quantity of the energy storage units reaching the upper charging limit in a shorter time can meet the energy storage unit demand quantity of the charging system in the current time, the energy storage units to be replaced required in the charging system are quickly supplemented, and the charging efficiency of the charging system is improved.

In one embodiment, wherein the charging priority of the primary charging energy storage unit is greater than the charging priority of other ones of the rechargeable energy storage units other than the primary charging energy storage unit; and charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority order of the energy storage units of each type, wherein the method comprises the following steps: charging each energy storage unit in the primary charging energy storage units by using the residual power of the charging system in the current time; determining whether the charging system has residual power after charging all the energy storage units in the primary charging energy storage unit is completed; and if the charging system has residual power after the charging of all the energy storage units in the primary charging energy storage unit is completed, the other energy storage units except the primary charging energy storage unit in the chargeable energy storage unit are charged according to the charging time sequence.

In the implementation process, when the chargeable energy storage unit is charged, the primary charging energy storage unit is charged first, so that the number of the energy storage units reaching the upper charging limit in a short time can meet the energy storage unit demand of the charging system at the current time, the energy storage units to be replaced needed in the charging system are quickly supplemented, and the charging efficiency of the charging system is improved. In addition, after all the energy storage units in the primary charging energy storage unit are charged, if the charging system has residual power, each energy storage unit in other energy storage units except the primary charging energy storage unit in the chargeable energy storage unit is charged according to the charging time sequence, so that the residual electric quantity of each chargeable energy storage unit in the charging system can reach the charging upper limit in time, preparation is made for subsequent power change, and the charging and power change efficiency of the charging system is further improved.

In one embodiment, after determining whether the charging system has remaining power after the charging of all the energy storage units in the primary charging energy storage unit is completed, charging the energy storage units in the one or more types of energy storage units according to the remaining power of the current time of the charging system and the charging priority order of the energy storage units of each type, and further including: if all the energy storage units in the primary charging energy storage unit are charged, the charging system has residual power, and whether a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal is judged; if a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal, determining a charging module which can be switched to the charging terminal; charging the new charging terminal and/or the original charging terminal through the charging module; determining whether the charging system has residual power after the new charging terminal and/or the original charging terminal are/is charged; and if the charging system has residual power after the new charging terminal and/or the original charging terminal are charged, charging other energy storage units except the primary charging energy storage unit in the chargeable energy storage units according to the charging time sequence.

In the implementation process, after the primary charging energy storage unit is charged, a new charging terminal and/or an original charging terminal connected in the charging system are charged, so that the waiting time of charging of a user can be reduced, and the user experience is improved. In addition, after the new charging terminal or the original charging terminal is charged, if the charging system has residual power, each energy storage unit in other energy storage units except the primary charging energy storage unit in the chargeable energy storage units is charged according to the charging time sequence, so that the residual electric quantity of each chargeable energy storage unit in the charging system can reach the charging upper limit in time, preparation is made for subsequent power change, and the charging and power change efficiency of the charging system is further improved.

In one embodiment, wherein the energy storage unit comprises a plurality of specifications; the step of classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit comprises the following steps: and classifying the energy storage units of each specification in the charging system according to the demand of the energy storage units of each specification in the current time and the current energy storage unit state of each energy storage unit of the corresponding specification.

In the implementation process, when the charging system comprises the energy storage units with various specifications, the energy storage units in the energy storage units with various specifications are respectively classified, so that the classification accuracy of the energy storage units in the charging system can be improved.

In a second aspect, embodiments of the present application further provide a charging system, including: a plurality of charging modules, a plurality of energy storage units and a control device; one end of each charging module is connected with external power supply, and the other end of each charging module is connected with one energy storage unit; the control equipment is connected with all the charging modules; wherein the control device is configured to control the charging module to charge the energy storage unit according to the first aspect described above, or any one of the possible implementation manners of the first aspect.

In a third aspect, an embodiment of the present application further provides a charging device, including: the acquisition module is used for acquiring the current energy storage unit state of each energy storage unit in the charging system at the current time; the classification module is used for classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit state of each energy storage unit so as to obtain each type of energy storage unit; and the charging module is used for charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority sequence of each type of energy storage unit.

In a fourth aspect, embodiments of the present application further provide an electronic device, including: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor, perform the steps of the method of the first aspect, or any of the possible implementations of the first aspect.

In a fifth aspect, the embodiments of the present application further provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the charging method of the first aspect, or any of the possible implementation manners of the first aspect.

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a medium-sized power exchange station according to an embodiment of the present application;

fig. 2 is a schematic diagram of a charging and replacing integrated station according to an embodiment of the present application;

fig. 3 is a schematic block diagram of an electronic device according to an embodiment of the present application;

fig. 4 is a flowchart of a charging method provided in an embodiment of the present application;

fig. 5 is a charging flow chart of a rechargeable energy storage unit according to a charging method provided in an embodiment of the present application;

fig. 6 is a charging flow chart of a rechargeable energy storage unit and a charging terminal of the charging method according to the embodiment of the present application;

fig. 7 is a schematic functional block diagram of a charging device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

The current electric vehicle industry is evolving rapidly, and consumers are increasingly inclined to select electric vehicles as a walking aid. As the amount of maintenance of electric vehicles increases, the demand for powering up the electric vehicles correspondingly increases, and various kinds of powering up devices also continue to appear. The charging and replacing station is an important facility capable of realizing quick power up at present.

Various charging devices, such as battery bins, charging piles and the like, are generally arranged in the charging and replacing station. The battery compartment is generally matched with the battery replacing platform for use, the battery compartment charges the power battery, and the battery replacing platform replaces the power battery for the electric automobile. Charging is used for rapid charging of electric vehicles.

The inventor of the application finds that the charging power distribution of the current charging and replacing station or the current replacing station is relatively uniform when the energy storage unit is charged, and the required battery to be replaced cannot be rapidly replenished.

In view of this, the present application proposes a charging method, when charging the energy storage units in the charging system, the energy storage units are classified according to the current energy storage unit demand of the charging system and the current energy storage unit states of the energy storage units, and the energy storage units of each type are charged according to the priority ordering of the energy storage units of each type, so that the energy storage units with short charging time can be charged preferentially, so that the number of the energy storage units reaching the upper charging limit in a shorter time can meet the energy storage unit demand of the charging system at the current time, the needed to-be-replaced energy storage units in the charging system can be quickly replenished, and the charging efficiency of the charging system can be improved.

For the sake of understanding the present embodiment, a detailed description will be given of a charging system for executing the disclosure of the present embodiment.

Fig. 1 and fig. 2 are schematic diagrams of a charging system according to an embodiment of the present application. The charging system includes: a plurality of charging modules 100, a plurality of energy storage units, and a control device 400.

One end of each charging module 100 is connected with external power supply, and the other end is connected with an energy storage unit; the control device 400 is connected to all the charging modules 100.

The external power supply here may be municipal power supply, generator power supply, solar power supply, or the like. The external power supply may be selected according to the actual situation.

Alternatively, the charging system may be a micro-scale power station (not shown), a medium-scale power station (shown in fig. 1), a charging and exchanging integrated station (shown in fig. 2), or the like. The charging system can be selected according to actual requirements, and the application is not particularly limited.

The charging module 100 is configured to control the corresponding energy storage unit to switch between different states of charging, discharging, power-off, communication, and voltage conversion.

In one embodiment, the charging module 100 may be a driver chip. For example, the charging module 100 may be a single chip microcomputer, a programmable controller, etc., and the charging module 100 may be adjusted according to actual situations.

The energy storage unit described above is a device for storing electrical energy. The energy storage unit comprises a storage device 210, for example a rechargeable battery.

Optionally, the energy storage unit may further include a charging stake and a battery compartment. Each charging pile is connected with one charging module 100, and each battery compartment is connected with one charging module 100. Wherein the storage device 210 is connected with the charging module 100 through a battery compartment.

It should be appreciated that the energy storage unit may also include a charging terminal 220 when the charging system is a charging and recharging integrated station. Such as electric cars, battery cars, etc. The charging terminal 220 is connected to the charging module 100 through a charging peg.

The memory cell described above may include a plurality of specifications. For example, the energy storage unit may include 10Ah, 12Ah, 20Ah, etc., and the specification of the energy storage unit may be selected according to the actual situation.

In one embodiment, the charging system further comprises a switching unit 300. One end of the switch unit 300 is connected with the charging module 100, and the other end of the switch unit 300 is connected with the energy storage unit. The switching unit 300 is configured to be opened or closed under the control of the charging module 100 to charge or stop charging the energy storage unit.

Wherein each of the switching units 300 includes one or more switches therein, and the charging module 100 is connected to one or more energy storage units through the switching units 300. For example, one charging module 100 may connect one charging terminal 220 and one rechargeable battery.

It will be appreciated that at the same time, the charging module 100 charges only one of the plurality of energy storage units connected to the charging module 100.

The control device 400 described above is configured to control the charging module 100 to charge the energy storage unit according to the charging method.

Specifically, the control apparatus 400 may be configured to classify a plurality of energy storage units in the charging system according to the current energy storage unit states and the required amounts of the respective energy storage units in the charging system, and charge the respective energy storage units according to the classification results and in a priority order.

In order to facilitate understanding of the present embodiment, a control apparatus that performs the charging method disclosed in the embodiment of the present application will be described in detail.

As shown in fig. 3, a block schematic diagram of the electronic device is shown. The control device 400 may comprise a memory 411, a processor 413. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 3 is merely illustrative and is not limiting of the configuration of the control device 400. For example, the control device 400 may also include more or fewer components than shown in fig. 3, or have a different configuration than shown in fig. 3.

The memory 411 and the processor 413 are directly or indirectly electrically connected to each other to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The processor 413 is configured to execute the executable modules stored in the memory.

The Memory 411 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-Only Memory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc. The memory 411 is used for storing a program, the processor 413 executes the program after receiving an execution instruction, and the method executed by the control device 400 for defining a procedure disclosed in any embodiment of the present application may be applied to the processor 413 or implemented by the processor 413.

The processor 413 may be an integrated circuit chip with signal processing capabilities. The processor 413 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), and the like; but also digital signal processors (digital signal processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The control apparatus 400 in the present embodiment may be used to perform each step in each method provided in the embodiments of the present application. The implementation of the charging method is described in detail below by means of several embodiments.

Referring to fig. 4, a flowchart of a charging method according to an embodiment of the present application is shown. The specific flow shown in fig. 4 will be described in detail.

Step S201, obtaining a current energy storage unit state of each energy storage unit in the charging system at the current time.

Wherein, the current energy storage unit state may include: the current energy storage unit state can be adjusted according to actual conditions, such as residual electric quantity, abnormal states, storage unit types and the like.

Step S202, classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit states of the energy storage units to obtain the energy storage units of all types.

In one embodiment, prior to step S202, the method further includes obtaining a demand of the current time energy storage unit.

The demand of the energy storage units at the current time is the number of the energy storage units needed at the current moment.

It should be understood that, because the charging system is a power exchange station or a charging and power exchange integrated station, the user connects the energy storage unit with insufficient electric quantity to the charging system and obtains the energy storage unit with the electric quantity reaching the upper charging limit in the charging system, so that the user can continue to work with the equipment through the energy storage unit with the electric quantity reaching the upper charging limit in the charging system, and the power exchange is completed.

The control unit can acquire the number of the energy storage units needed by the charging system in real time or at intervals to determine the energy storage units, which are needed by the current charging system and provide electricity quantity reaching the upper charging limit.

Wherein, the energy storage unit with the electric quantity reaching the upper charging limit does not need to be recharged. The upper charging limit may be that the electric quantity of the energy storage unit is full, and the electric quantity of the energy storage unit reaches a set ratio (e.g., the electric quantity of the energy storage unit reaches 80% of full power, the electric quantity of the energy storage unit reaches 90% of full power, etc.). The upper charging limit can be adjusted according to practical situations, and the application is not particularly limited.

It will be appreciated that in order to increase the efficiency with which the charging system provides energy storage units, the energy storage units in the charging system are classified by the demand of the energy storage unit at the present time and the current energy storage unit state of the element of each energy storage to charge each energy storage unit by type.

Alternatively, the types of the energy storage unit may include: a rechargeable energy storage unit, a non-rechargeable energy storage unit, etc. The rechargeable energy storage unit may be further divided into a primary charging energy storage unit, a secondary charging energy storage unit, etc., and the non-rechargeable energy storage unit may be further divided into an abnormal energy storage unit, an occupied energy storage unit, etc. After the energy storage units are classified, the obtained types can be adjusted according to actual conditions.

Step S203, charging the energy storage units in the one or more types of energy storage units according to the remaining power of the charging system at the current time and the charging priority order of the energy storage units of each type.

The charging priority order here may be ordered according to the type of energy storage unit.

In one embodiment, the plurality of energy storage units in each type of energy storage unit may be further prioritized based on the current energy storage unit status of the energy storage unit.

Alternatively, the charging priority order of the respective types of energy storage units may be: the priority of the primary charging energy storage unit is greater than the priority of the occupied energy storage unit, the priority of the occupied energy storage unit is greater than the priority of the secondary charging energy storage unit, and the priority of the secondary charging energy storage unit is greater than the priority of the abnormal energy storage unit. The charging priority order of the energy storage units of each type can be as follows: the priority of the occupied energy storage unit is greater than the priority of the primary charging energy storage unit, the priority of the primary charging energy storage unit is greater than the priority of the secondary charging energy storage unit, the priority of the secondary charging energy storage unit is greater than the priority of the abnormal energy storage unit, and the like. The specific ordering of the priorities can be adjusted according to actual conditions.

It should be appreciated that after charging the energy storage unit in the one type of energy storage unit with the highest priority ranking, if there is still remaining power in the charging system, the charging system may continue to charge the energy storage unit in the type of energy storage unit with the second priority ranking, if there is still remaining power in the charging system after charging the energy storage unit in the type of energy storage unit with the second priority ranking, the charging system may continue to charge the energy storage unit in the type of energy storage unit with the third priority ranking.

It may be appreciated that when charging the energy storage units in each type of energy storage unit, the charging priority order of each energy storage unit in the type of energy storage unit may also be determined according to the current energy storage unit state of each energy storage unit in the type of energy storage unit, and each energy storage unit in the type of energy storage unit may be charged according to the charging priority order. For example, the energy storage units may be prioritized according to the remaining power of each of the type of energy storage units from large to small.

In one possible implementation, step S202 includes: determining the quantity of full-power energy storage units of the energy storage units, the residual electric quantity of which reaches the upper charging limit, in a charging system; determining the difference between the required quantity and the quantity of the full-power energy storage units, and determining the difference as the residual required quantity of the energy storage units which need to be charged; and classifying the other energy storage units according to the residual demand and the current energy storage unit states of the other energy storage units so as to obtain each type of energy storage unit.

The other energy storage units are energy storage units except for the fact that the residual electric quantity in the charging system reaches the upper charging limit.

It should be understood that when the demand of the energy storage unit in the charging system at the current time is determined, the full-power energy storage unit reaching the upper charging limit in the charging system is determined first, and the full-power energy storage unit is preferentially used as the energy storage unit required by the charging system. If the number of the full-power energy storage units is greater than or equal to the demand of the energy storage units in the current time, the full-power energy storage units can be directly used for power conversion. If the number of the full-power energy storage units is smaller than the demand of the energy storage units in the current time, the full-power energy storage units can be used for replacing power, and the rest energy storage units can be charged according to the priority order, so that the charging system can provide the full-power energy storage units meeting the demand in a short time.

When the charging system charges other energy storage units except the full-electricity energy storage unit, the residual demand of the energy storage unit reaching the upper charging limit, which is required to be provided by the charging system, is determined according to the difference between the quantity of the full-electricity energy storage units and the demand.

The energy storage unit with the residual demand is the energy storage unit which is needed to be charged first in the charging system. That is, the charging priority of the energy storage unit of the remaining demand amount may be set to the highest charging priority of the current time.

It will be appreciated that since the charge level of the full-charged energy storage unit has reached the upper charging limit, the charging system only needs to charge energy storage units other than the full-charged energy storage unit. Thus, when classifying energy storage units in a charging system, it is only necessary to classify other energy storage units than full-electric energy storage units.

In one possible implementation, step S202 further includes: determining that the current energy storage unit state in other energy storage units is an abnormal state; and determining the energy storage units except the abnormal energy storage unit in the other energy storage units as chargeable energy storage units.

The abnormal state is a state in which the energy storage unit is limited in charging. Such as a state in which the energy storage unit is malfunctioning, the energy storage unit is not accessed, the energy storage unit is disabled, etc. The abnormal state can be adjusted according to the actual situation.

It should be appreciated that since the abnormal energy storage unit is in an abnormal state at the present time, the energy storage unit in the abnormal state cannot be charged. Therefore, when the charging system charges each energy storage unit, the abnormal energy storage unit with the abnormal state of the current energy storage unit in the charging system can be determined first, and the abnormal energy storage unit is determined to be a non-chargeable energy storage unit, so that the abnormal energy storage unit is not charged. And meanwhile, the energy storage units except for the non-chargeable energy storage unit in the other energy storage units are determined to be chargeable energy storage units, and the chargeable energy storage units can be charged by the charging system.

In one possible implementation, before step S202, the method further includes: and acquiring the current module state of each charging module in the charging system at the current time. Step S202 further includes: determining that the current energy storage unit state in other energy storage units is an abnormal state; determining that the energy storage unit connected with the charging module with the current module state being the occupied state of the charging terminal is an occupied energy storage unit in other energy storage units; and determining the energy storage units except the abnormal energy storage unit and the occupied energy storage unit in the other energy storage units as chargeable energy storage units.

The current module state is a connection state, an action state and the like of the charging module at the current time. The current module state may include a charging terminal occupancy state, a charging module deactivation state, a charging module failure state, and the like. The current module state can be adjusted according to actual conditions.

The charging terminal here is a charging device external to the charging system. The charging terminal can be an electric car, a battery car and the like.

It will be appreciated that if the charging system is a charging and replacing integrated station, the energy storage unit of the charging system may be connected to not only an energy storage device (e.g. a rechargeable battery) for replacing electricity, but also a charging terminal. The charging terminal is connected with external power supply through the charging module.

If a certain charging module is connected with the charging terminal and charges the corresponding charging terminal, the charging module cannot charge the energy storage device connected with the charging module. At this time, the charging module is occupied by the charging terminal, and cannot provide the charging system with the energy storage unit satisfying the demand amount by charging the energy storage device.

It should be understood that, as shown in fig. 2, the charging module, which can be connected to the terminal device, is connected to the terminal device and the energy storage device, respectively, through the switching unit. Because the voltage levels received by the terminal equipment and the energy storage equipment are different, the safety of the terminal equipment and the energy storage equipment is ensured in order to prevent the power supply in the energy storage equipment from being reversely fed into the terminal equipment or the power supply in the terminal equipment from being reversely fed into the terminal equipment. The charging module stops charging the energy storage device when charging the terminal device; and stopping charging the terminal equipment when the energy storage equipment is charged. The charging priority of the charging terminal is greater than that of the charging terminal of the energy storage device, so that the charging module occupied by the charging terminal cannot charge the corresponding energy storage device. In addition, since the abnormal energy storage unit is in an abnormal state at the current time, the energy storage unit in the abnormal state cannot be charged. The occupied energy storage unit and the abnormal energy storage unit are both uncharged energy storage units, and the energy storage units except the abnormal energy storage unit and the occupied energy storage unit in other energy storage units are chargeable energy storage units.

In one possible implementation, after determining the rechargeable energy storage unit, step S202 further includes: determining the charging time required to be consumed by each energy storage unit in the chargeable energy storage units when the energy storage units reach the upper charging limit according to the to-be-charged amount of each energy storage unit in the chargeable energy storage units and the maximum charging power of corresponding charging equipment; sequencing the charging time from short to long; and determining the set number of the energy storage units which are arranged in the front order as the first energy storage unit to be charged.

The to-be-charged amount of each energy storage unit is the difference between the corresponding electric quantity of the upper charging limit of each energy storage unit and the current residual electric quantity.

The charging device herein is a device that supplies power to the energy storage unit. For example, the charging device may be a charger, municipal power supply, generator, or the like. The charging device may be selected according to the actual situation.

In one embodiment, the charging time that each energy storage unit needs to consume to reach the upper charging limit may be a quotient of the to-be-charged amount of the energy storage unit and the maximum charging power of the charging device corresponding to the energy storage unit.

It will be appreciated that in order to provide a charging system that provides efficiency of the energy storage units up to the upper charging limit, after the charging time of each energy storage unit is calculated, the individual energy storage units are ordered from short to long charging times, and the energy storage units with short charging times are charged preferentially.

Since the energy storage unit which is required to provide the residual demand in the rechargeable energy storage unit reaches the upper charging limit, the demand of the energy storage unit at the current time is met. Therefore, the remaining energy storage units of the rechargeable energy storage unit need to be divided into primary charging energy storage units to charge the primary charging energy storage units preferentially, so that the charging system provides the energy storage units meeting the demand in time.

In determining the primary charging energy storage unit, in order to increase the efficiency of the charging system to provide energy storage units satisfying the demand, the energy storage unit of the pre-set number of chargeable energy storage units having a shorter charging time may be determined as the primary charging energy storage unit.

The set amount here is the remaining demand.

The charging priority of the primary charging energy storage unit is greater than the charging priority of other energy storage units except the primary charging energy storage unit in the chargeable energy storage unit.

In one possible implementation, as shown in fig. 5, step S203 includes: charging each energy storage unit in the energy storage units to be charged by using the residual power of the charging system in the current time; determining whether the charging system has residual power after charging all the energy storage units in the primary charging energy storage unit is completed; and if the charging system has residual power after the charging of all the energy storage units in the primary charging energy storage unit is completed, the energy storage units except the primary charging energy storage unit in the chargeable energy storage units are charged according to the charging time sequence.

It should be understood that, since the charging priority of the primary charging energy storage unit is greater than the charging priority of the other energy storage units other than the primary charging energy storage unit in the chargeable energy storage units, the charging system preferentially charges the energy storage units in the primary charging energy storage unit when charging the energy storage units in the chargeable energy storage units, so that the charging system first provides the energy storage units satisfying the demand.

When the energy storage units in the primary charging energy storage units are charged, the energy storage units in the primary charging energy storage units can be charged sequentially from short to long according to the charging time of the charging of the energy storage units in the primary charging energy storage units.

The charging power of each energy storage unit is the minimum value of the rated charging power of the energy storage unit and the maximum charging power of the charging device.

In addition, after the charging of each energy storage unit in the primary charging energy storage unit is completed, if the charging system has residual power, the other energy storage units except the primary charging energy storage unit in the chargeable energy storage units are charged, so that the residual electric quantity of each chargeable energy storage unit in the charging system can reach the upper limit of charging in time, and preparation is made for subsequent power exchange.

In one embodiment, each of the other ones of the rechargeable energy storage units except the primary charging energy storage unit may be charged in a short to long order of charging time.

In one possible implementation, as shown in fig. 6, after determining whether the charging system has remaining power after charging all the energy storage units in the primary charging energy storage unit is completed, step S203 further includes: if all the energy storage units in the primary charging energy storage unit are charged, the charging system has residual power, and whether a new charging terminal is connected into the charging system or an additional charging module is needed to be added to an original charging terminal is judged; if a new charging terminal is connected to the charging system or an additional charging module is needed to be added to the original charging terminal, determining a charging module which can be switched to the charging terminal; charging the new charging terminal and/or the original charging terminal through the charging module; determining whether the charging system has residual power after the new charging terminal and/or the original charging terminal are/is charged; and if the charging system has residual power after the new charging terminal and/or the original charging terminal are charged, the charging system is used for charging other energy storage units except the primary charging energy storage unit in the chargeable energy storage units according to the charging time sequence.

It should be understood that if a new charging terminal is connected to the charging system at the current time, the new charging terminal is a user device such as an electric car or a battery car that needs to be charged. In order to reduce the waiting time of charging for the user, after the primary charging energy storage unit is charged, the newly connected charging terminal can be charged first.

In addition, if the electric energy provided by the charging module connected with a certain original charging terminal connected in the charging system at the current time can not meet the original charging terminal, one or more other charging modules in the charging system can be connected with the original charging terminal so as to charge the original charging terminal through a plurality of charging modules. In order to reduce the waiting time of charging for the user, the primary charging energy storage unit can be charged by the charging module connected with the primary charging terminal after the primary charging energy storage unit is charged.

After the new charging terminal or the original charging terminal is charged, if the charging system has residual power, other energy storage units except the primary charging energy storage unit in the chargeable energy storage units are charged, so that the residual electric quantity of each chargeable energy storage unit in the charging system can reach the upper charging limit in time, and preparation is made for subsequent power exchange.

In one possible implementation, step S202 includes: and classifying the energy storage units of each specification in the charging system according to the demand of the energy storage units of each specification in the current time and the current energy storage unit state of each energy storage unit of the corresponding specification.

It should be understood that when the charging system includes a plurality of specification energy storage units, the charging system may classify the energy storage units of each specification according to the energy storage units of each specification and charge the energy storage units of each type according to the priority order of the energy storage units of each type in each specification when charging the energy storage units of each specification.

For example, if the energy storage unit in the charging system includes a specification a energy storage unit and a specification B energy storage unit. The charging method can be implemented as follows: the method comprises the steps of obtaining the demand of an energy storage unit of a specification A at the current time, the current energy storage unit state of each energy storage unit in the energy storage unit of the specification A, the demand of an energy storage unit of a specification B and the current energy storage unit state of each energy storage unit in the energy storage unit of the specification B. Classifying the specification A energy storage units according to the demand of the specification A energy storage units and the current energy storage unit states of all the energy storage units in the specification A energy storage units to obtain all types of corresponding energy storage units of the specification A energy storage units; and classifying the specification B energy storage units according to the demand of the specification B energy storage units and the current energy storage unit states of all the energy storage units in the specification A energy storage units to obtain all types of corresponding energy storage units of the specification B energy storage units. The specification A energy storage unit can be divided into a first-order charging energy storage unit of the specification A, a second-order charging energy storage unit of the specification A and a non-chargeable unit of the specification A. The specification B energy storage unit may be classified into a specification B primary charging energy storage unit, a specification B secondary charging energy storage unit, and a specification B non-charging unit. The charging priority of the primary charging energy storage unit in the specification A is greater than the charging priority of the secondary charging energy storage unit in the specification A, and the charging priority of the secondary charging energy storage unit in the specification A is greater than the charging priority of the non-chargeable unit in the specification A. The charging priority of the primary charging energy storage unit in the specification B is greater than the charging priority of the secondary charging energy storage unit in the specification B, and the charging priority of the secondary charging energy storage unit in the specification B is greater than the charging priority of the non-chargeable unit in the specification B.

After the classification of the specification A energy storage unit and the specification B energy storage unit is finished, firstly charging the specification A primary charging energy storage unit and the specification B primary charging energy storage unit, and after the charging of the specification A primary charging energy storage unit and the specification B primary charging energy storage unit is finished, if residual power exists in the charging system, charging the specification A secondary charging energy storage unit and the specification B secondary charging energy storage unit.

In one embodiment, when charging the secondary charging energy storage unit of the specification a and the secondary charging energy storage unit of the specification B, the charging time of the energy storage unit in the secondary charging energy storage unit of the specification a and the energy storage unit in the secondary charging energy storage unit of the specification B may be sequentially from short to long.

Based on the same application concept, the embodiment of the present application further provides a charging device corresponding to the charging method, and since the principle of solving the problem of the device in the embodiment of the present application is similar to that of the foregoing embodiment of the charging method, the implementation of the device in the embodiment of the present application may refer to the description in the embodiment of the foregoing method, and the repetition is omitted.

Fig. 7 is a schematic functional block diagram of a charging device according to an embodiment of the present application. Each module in the charging device in this embodiment is configured to perform each step in the above-described method embodiment. The charging device comprises an acquisition module 301, a classification module 302 and a charging module 303; wherein,

the acquiring module 301 is configured to acquire a current energy storage unit state of each energy storage unit in the charging system at a current time.

The classification module 302 is configured to classify the energy storage units in the charging system according to the demand of the energy storage unit at the current time and the current energy storage unit state of each energy storage unit, so as to obtain each type of energy storage unit.

The charging module 303 is configured to charge an energy storage unit of the one or more types of energy storage units according to the remaining power of the charging system at the current time and a charging priority order of each type of energy storage unit.

In a possible implementation manner, the classification module 302 is specifically configured to: determining the number of full-power energy storage units of the energy storage units, of which the residual electric quantity reaches the upper charging limit, in the charging system; determining the difference between the required quantity and the quantity of the full-power energy storage units, and determining the difference as the residual required quantity of the energy storage units needing to be charged; classifying the other energy storage units according to the residual demand and the current energy storage unit states of the other energy storage units to obtain various types of energy storage units; the other energy storage units are energy storage units except for the residual electric quantity reaching the upper charging limit in the charging system.

In a possible implementation manner, the classification module 302 is specifically configured to: determining that the energy storage unit in the other energy storage units, the current energy storage unit state of which is in an abnormal state, is an abnormal energy storage unit; and determining that the energy storage units except the abnormal energy storage unit in the other energy storage units are chargeable energy storage units.

In a possible implementation manner, the obtaining module 301 is specifically configured to: the method comprises the steps of obtaining the current module state of each charging module in a charging system at the current time, wherein the current module state comprises the occupied state of a charging terminal.

In a possible implementation manner, the classification module 302 is specifically configured to: determining that the energy storage unit in the other energy storage units, the current energy storage unit state of which is in an abnormal state, is an abnormal energy storage unit; determining that the energy storage unit connected with the charging module with the current module state being the occupied state of the charging terminal is an occupied energy storage unit in the other energy storage units; and determining the energy storage units except the abnormal energy storage unit and the occupied energy storage unit in the other energy storage units as chargeable energy storage units.

In a possible implementation manner, the classification module 302 is specifically configured to: determining the charging time required to be consumed by each energy storage unit in the chargeable energy storage units when the energy storage unit reaches the upper charging limit according to the to-be-charged amount of each energy storage unit in the chargeable energy storage units and the maximum charging power of corresponding charging equipment; sequencing the charging time from short to long; and determining the set number of the energy storage units which are arranged at the front as the energy storage units to be charged, wherein the set number is the residual demand.

In a possible implementation manner, the charging module 303 is specifically configured to: charging each energy storage unit in the primary charging energy storage units by using the residual power of the charging system in the current time; determining whether the charging system has residual power after charging all the energy storage units in the primary charging energy storage unit is completed; and if the charging system has residual power after the charging of all the energy storage units in the primary charging energy storage unit is completed, the other energy storage units except the primary charging energy storage unit in the chargeable energy storage unit are charged according to the charging time sequence.

In a possible implementation manner, the charging module 303 is specifically configured to: if all the energy storage units in the primary charging energy storage unit are charged, the charging system has residual power, and whether a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal is judged; if a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal, determining a charging module which can be switched to the charging terminal; charging the new charging terminal and/or the original charging terminal through the charging module; determining whether the charging system has residual power after the new charging terminal and/or the original charging terminal are/is charged; and if the charging system has residual power after the new charging terminal and/or the original charging terminal are charged, charging other energy storage units except the primary charging energy storage unit in the chargeable energy storage units according to the charging time sequence.

In a possible implementation manner, the classification module 302 is specifically configured to: and classifying the energy storage units of each specification in the charging system according to the demand of the energy storage units of each specification in the current time and the current energy storage unit state of each energy storage unit of the corresponding specification.

Furthermore, the embodiment of the present application provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor performs the steps of the charging method described in the embodiment of the method.

The computer program product of the charging method provided in the embodiments of the present application includes a computer readable storage medium storing program codes, where the instructions included in the program codes may be used to execute the steps of the charging method described in the foregoing method embodiments, and specifically, reference may be made to the foregoing method embodiments, which are not described herein.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners as well. The apparatus embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A charging method, comprising:

acquiring the current energy storage unit state of each energy storage unit in the charging system at the current time;

classifying the energy storage units in the charging system according to the demand of the energy storage units in the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit;

And charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority sequence of the energy storage units.

2. The method of claim 1, wherein the current energy storage unit state comprises: a residual amount of electricity;

the step of classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit state of each energy storage unit to obtain each type of energy storage unit comprises the following steps:

determining the number of full-power energy storage units of the energy storage units, of which the residual electric quantity reaches the upper charging limit, in the charging system;

determining the difference between the required quantity and the quantity of the full-power energy storage units, and determining the difference as the residual required quantity of the energy storage units needing to be charged;

classifying the other energy storage units according to the residual demand and the current energy storage unit states of the other energy storage units to obtain various types of energy storage units; the other energy storage units are energy storage units except for the residual electric quantity reaching the upper charging limit in the charging system.

3. The method of claim 2, wherein the current energy storage unit state further comprises: abnormal state;

the step of classifying the other energy storage units according to the remaining demand and the current energy storage unit state of the other energy storage units to obtain each type of energy storage unit, and the step of:

determining that the energy storage unit in the other energy storage units, the current energy storage unit state of which is in an abnormal state, is an abnormal energy storage unit;

and determining that the energy storage units except the abnormal energy storage unit in the other energy storage units are chargeable energy storage units.

4. The method of claim 2, wherein the current energy storage unit state further comprises: abnormal state;

before classifying the other energy storage units according to the remaining demand and the current energy storage unit state of the other energy storage units to obtain each type of energy storage unit, the method further includes:

acquiring the current module state of each charging module in a charging system at the current time, wherein the current module state comprises the occupied state of a charging terminal;

determining that the energy storage unit connected with the charging module with the current module state being the occupied state of the charging terminal is an occupied energy storage unit in the other energy storage units;

and determining the energy storage units except the abnormal energy storage unit and the occupied energy storage unit in the other energy storage units as chargeable energy storage units.

5. The method according to claim 3 or 4, wherein after determining the chargeable energy storage units, the classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit states of the respective energy storage units to obtain respective types of energy storage units, further comprises:

determining the charging time required to be consumed by each energy storage unit in the chargeable energy storage units when the energy storage unit reaches the upper charging limit according to the to-be-charged amount of each energy storage unit in the chargeable energy storage units and the maximum charging power of corresponding charging equipment;

sequencing the charging time from short to long;

and determining the set number of the energy storage units which are arranged at the front as the energy storage units to be charged, wherein the set number is the residual demand.

6. The method of claim 5, wherein the primary charging energy storage unit has a charging priority that is greater than a charging priority of other ones of the rechargeable energy storage units other than the primary charging energy storage unit;

and charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority order of the energy storage units of each type, wherein the method comprises the following steps:

charging each energy storage unit in the primary charging energy storage units by using the residual power of the charging system in the current time;

determining whether the charging system has residual power after charging all the energy storage units in the primary charging energy storage unit is completed;

and if the charging system has residual power after the charging of all the energy storage units in the primary charging energy storage unit is completed, the other energy storage units except the primary charging energy storage unit in the chargeable energy storage unit are charged according to the charging time sequence.

7. The method of claim 6, wherein after determining whether the charging system has remaining power after charging all of the primary charging energy storage units is completed, charging energy storage units of one or more types of energy storage units according to the remaining power of the charging system at the current time and a charging priority order of each type of energy storage unit, further comprising:

If all the energy storage units in the primary charging energy storage unit are charged, the charging system has residual power, and whether a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal is judged;

if a new charging terminal is connected to the charging system or an additional charging module is needed to be added to an original charging terminal, determining a charging module which can be switched to the charging terminal;

charging the new charging terminal and/or the original charging terminal through the charging module;

determining whether the charging system has residual power after the new charging terminal and/or the original charging terminal are/is charged;

and if the charging system has residual power after the new charging terminal and/or the original charging terminal are charged, charging other energy storage units except the primary charging energy storage unit in the chargeable energy storage units according to the charging time sequence.

8. The method of claim 1, wherein the energy storage unit comprises a plurality of specifications;

And classifying the energy storage units of each specification in the charging system according to the demand of the energy storage units of each specification in the current time and the current energy storage unit state of each energy storage unit of the corresponding specification.

9. A charging system, comprising: a plurality of charging modules, a plurality of energy storage units and a control device;

one end of each charging module is connected with external power supply, and the other end of each charging module is connected with one energy storage unit;

the control equipment is connected with all the charging modules;

wherein the control device is configured to control the charging module to charge the energy storage unit according to the method of any one of claims 1-8.

10. A charging device, characterized by comprising:

the acquisition module is used for acquiring the current energy storage unit state of each energy storage unit in the charging system at the current time;

the classification module is used for classifying the energy storage units in the charging system according to the demand of the energy storage units at the current time and the current energy storage unit state of each energy storage unit so as to obtain each type of energy storage unit;

and the charging module is used for charging the energy storage units in the one or more types of energy storage units according to the residual power of the current time of the charging system and the charging priority sequence of each type of energy storage unit.