Battery charging method, device, system and equipment

Abstract

The present application discloses a battery charging method, device, system and equipment. Among them, the method includes: obtaining a first quantity of batteries to be replaced and first power quantity information of each battery to be replaced, where the first power quantity information is used to determine a target charging state of a battery to be charged for replacing the battery to be replaced; obtaining second power quantity information of each battery to be charged among the first quantity of batteries to be charged; determining a target charging mode for each battery to be charged based on the first quantity and the second power quantity information, and charging each battery to be charged based on the target charging mode and the target charging state, where the target charging mode includes at least one of the following: charging between batteries, charging the battery from the power grid, and discharging the battery to the power grid. The present application solves the technical problems in the related art that the process of charging a new battery is relatively cumbersome when the battery system fails, and the operation and maintenance cost and the electricity cost are relatively high.

Description

Technical Field

[0001] This application relates to the technical field of battery charging and discharging, and more specifically, to a battery replenishing method, device, system and equipment. Background Art

[0002] When a battery system fails, it is often necessary to replace some of the batteries. When replacing, it is necessary to ensure that the SOC (State of Charge, the state of charge, also known as the remaining power) of the new battery is the same as that of the old battery in the battery system. Otherwise, due to the series bucket effect, the capacity of the entire battery system will be reduced and the voltage deviation will be too large.

[0003] In the traditional solution, it is necessary for the operation and maintenance personnel to go to the site to confirm the cause of the failure of the old battery and the SOC of the old battery at the time of failure, and then perform charge and discharge calibration on the new battery to make the SOC of the new and old batteries the same, and then replace the old battery with the new battery. The whole process is time-consuming and laborious, and the operation and maintenance cost is relatively high; at the same time, during the charge and discharge calibration process, since the battery power is directly discharged into the power grid or directly consumed, and then power is obtained from the power grid to charge the battery, the required electricity cost is relatively high.

[0004] In response to the above problems, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present application provide a battery replenishing method, device, system and equipment, so as to at least solve the technical problems that the process of replenishing power for a new battery is relatively cumbersome, and the operation and maintenance cost and electricity cost are relatively high in the related art when the battery system fails.

[0006] According to an aspect of the embodiments of the present application, a battery replenishing method is provided, including: obtaining a first quantity of batteries to be replaced and first power information of each of the batteries to be replaced, where the first power information is used to determine a target replenishing state of a battery to be replenished for replacing the battery to be replaced; obtaining second power information of each of the batteries to be replenished among the first quantity of batteries to be replenished; determining a target replenishing mode for each of the batteries to be replenished based on the first quantity and the second power information, and replenishing power for each of the batteries to be replenished based on the target replenishing mode and the target replenishing state, where the target replenishing mode includes at least one of the following: batteries replenishing each other, the power grid charging the battery, and the battery discharging to the power grid.

[0007] Optionally, the first quantity is equal to one. The first power information at least includes a first state of charge, and the second power information at least includes a second state of charge. Determine the target charge state of the battery to be charged as the first state of charge of the battery to be replaced; determine whether the second state of charge of the battery to be charged is equal to zero; when the second state of charge is equal to zero, charge the battery to be charged through the power grid until the state of charge of the battery to be charged reaches the target charge state; when the second state of charge is greater than zero, control the battery to be charged to discharge to the power grid until the state of charge of the battery to be charged is equal to zero, and then charge the battery to be charged through the power grid until the state of charge of the battery to be charged reaches the target charge state.

[0008] Optionally, the first quantity is greater than one. Divide the battery to be charged into a first battery group and a second battery group. The first battery group includes a first battery to be charged, and the second battery group includes a second battery to be charged; charge the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charge state; when the number of the second batteries to be charged in the second battery group is greater than one, re-acquire the second power information of the second batteries to be charged, and repeat grouping and charging for the second batteries to be charged until there is only the last battery to be charged left; for the last battery to be charged, charge the last battery to be charged through the power grid until the power of the last battery to be charged reaches the target charge state.

[0009] Optionally, sort all the batteries to be charged based on the magnitudes of the second state of charge of each battery to be charged, and divide the batteries to be charged into the first battery group and the second battery group based on the sorting result, where the sum of the second state of charge of the first batteries to be charged in the first battery group does not exceed the sum of the second state of charge of the second batteries to be charged in the second battery group.

[0010] Optionally, the first power information at least includes a first state of charge, and the second power information at least includes a second state of charge. Determine the target charge state of each battery to be charged as the first state of charge of the battery to be replaced corresponding to the battery to be charged; for each first battery to be charged, control the first battery to be charged to discharge to the second battery to be charged until the state of charge of the first battery to be charged is equal to zero; then control the second battery to be charged to charge the first battery to be charged until the state of charge of the first battery to be charged reaches the target charge state.

[0011] Optionally, when the current second state of charge of the last battery to be charged is equal to zero, charge the last battery to be charged from the power grid until the state of charge of the last battery to be charged reaches the target charging state; when the current second state of charge of the last battery to be charged is greater than zero, control the last battery to be charged to discharge to the power grid until the state of charge of the last battery to be charged is equal to zero; then charge the last battery to be charged from the power grid until the state of charge of the last battery to be charged reaches the target charging state.

[0012] Optionally, when controlling the first battery to be charged to discharge to the second battery to be charged, if the state of charge of the second battery to be charged is full but the state of charge of the first battery to be charged is still greater than zero, control the first battery to be charged to continue discharging to the power grid until the state of charge of the first battery to be charged is equal to zero.

[0013] Optionally, when controlling the second battery to be charged to charge the first battery to be charged, if the state of charge of the second battery to be charged is equal to zero but the state of charge of the first battery to be charged still has not reached the target charging state, continue to charge the first battery to be charged from the power grid until the state of charge of the first battery to be charged reaches the target charging state.

[0014] Optionally, obtain the first quantity of the battery to be replaced from the cloud platform data center, and obtain the first power information of each battery to be replaced, where the cloud platform data center is used to manage battery information, and the first power information includes at least one of the following: the first state of charge, the first voltage.

[0015] Optionally, obtain the second power information of each battery to be charged through a communication interface connected to the battery to be charged, and the second power information includes at least one of the following: the second state of charge, the second voltage.

[0016] Optionally, after the battery to be charged is fully charged, send a notification message, which is used to notify the target object that the battery to be charged has been fully charged and the battery to be replaced can be replaced.

[0017] According to another aspect of the embodiments of the present application, there is also provided a battery charging device, including: a first acquisition module, configured to acquire a first quantity of batteries to be replaced and first power information of each of the batteries to be replaced, where the first power information is used to determine a target charging state of the batteries to be charged for replacing the batteries to be replaced; a second acquisition module, configured to acquire second power information of each of the batteries to be charged among the first quantity of batteries to be charged; a charging module, configured to determine a target charging mode for each of the batteries to be charged based on the first quantity and the second power information, and charge each of the batteries to be charged based on the target charging mode and the target charging state, where the target charging mode includes at least one of the following: charging between batteries, charging the battery from the power grid, and discharging the battery to the power grid.

[0018] According to another aspect of the embodiments of the present application, there is also provided a battery charging system, including: an energy management unit, configured to execute the above-mentioned battery charging method; a communication unit, configured to establish a communication connection between the energy management unit and the cloud platform data center; a communication interface, configured to establish a communication connection between the energy management unit and the batteries to be charged; an AC-DC conversion unit, located between the power grid and the DC bus, configured to perform conversion between AC and DC; a DC conversion unit, located between the DC bus and the batteries to be charged, configured to perform conversion between DC and DC.

[0019] According to another aspect of the embodiments of the present application, there is also provided a battery charging device, including: a memory and a processor, where a computer program is stored in the memory, and the processor is configured to execute the above-mentioned battery charging method through the computer program.

[0020] In the present application, first, a first quantity of batteries to be replaced and first power information of each battery to be replaced are acquired, and the first power information is used to determine a target charging state of the batteries to be charged for replacing the batteries to be replaced; at the same time, second power information of each of the first quantity of batteries to be charged is acquired; then, a target charging mode for each of the batteries to be charged is determined based on the first quantity and the second power information, and the target charging mode includes: charging between batteries, charging the battery from the power grid, and discharging the battery to the power grid; finally, each of the batteries to be charged is charged based on the target charging mode and the target charging state. Among them, by acquiring relevant information of the battery online, it is possible to avoid maintenance personnel from traveling back and forth to the site to confirm the charging data, reducing the maintenance cost; automatically selecting a charging mode based on the relevant information of the battery to charge the battery, and preferentially selecting charging between batteries, the process is simple and the electricity cost can be reduced, thus solving the technical problems in the related art that the process of charging new batteries is relatively cumbersome when the battery system fails, and the maintenance cost and electricity cost are relatively high. Description of the Drawings

[0021] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a battery charging supplementary system according to an embodiment of the present application;

[0023] Figure 2 is a schematic flowchart of a battery charging supplementary method according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of energy flow for mutual charging between batteries according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of energy flow for the power grid to charge the battery according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of energy flow for the battery to discharge to the power grid according to an embodiment of the present application;

[0027] Figure 6 is a schematic diagram of the process of charging a single battery according to an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of the process of charging multiple batteries according to an embodiment of the present application;

[0029] Figure 8 is a schematic structural diagram of a battery charging supplementary device according to an embodiment of the present application. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] Embodiment 1

[0033] In order to solve the technical problems in the related art that the process of replenishing power to a new battery during a battery system failure is relatively cumbersome and the operation and maintenance costs and electricity costs are relatively high, the embodiments of the present application provide an automated battery power replenishment solution. Among them, by obtaining relevant information of the battery online, it is possible to avoid the operation and maintenance personnel from traveling back and forth to the site to confirm the power replenishment data, reducing the operation and maintenance costs; based on the relevant information of the battery, the power replenishment mode is automatically selected to replenish power to the battery, and priority is given to mutual power replenishment between batteries. The process is simple and can reduce the electricity costs.

[0034] Specifically, as Figure 1 shown, the embodiments of the present application first provide a battery power replenishment system, which at least includes: an energy management unit 11, a communication unit 12, communication interfaces 13(1-n), an AC / DC conversion unit 14, and DC conversion units 15(1-n), where:

[0035] The energy management unit 11 is the core unit of the entire system. It is used to obtain relevant information of the battery to be replaced from the cloud platform data center, and obtain relevant information of the corresponding battery to be replenished power from the communication interfaces 13(1-n) respectively; then analyze this information to determine the target power replenishment state and target power replenishment mode of each battery to be replenished power, and the target power replenishment mode at least includes one of the following: mutual power replenishment between batteries, power grid charging the battery, and the battery discharging to the power grid; finally, based on the target power replenishment mode, replenish power to each battery to be replenished power to make it reach the target power replenishment state.

[0036] Among them, the cloud platform data center is used to manage relevant information such as the operating status of the battery, such as battery capacity, state of charge SOC, voltage, etc.; it usually provides a client or an interaction interface, such as an APP, a WEB page or a host computer, for realizing human-computer interaction and facilitating the operation and maintenance personnel to obtain the required battery information.

[0037] A communication unit 12 is used to establish a communication connection between the energy management unit 11 and the cloud platform data center.

[0038] Communication interfaces 13(1 - n) are used to establish communication connections between the energy management unit 11 and the batteries to be charged (1 - n).

[0039] An AC / DC conversion unit 14 is located between the power grid and the DC bus and is used to convert between AC and DC. Specifically, it can be a power conversion system (PCS), which is usually used in conjunction with a disconnect switch. For example, Figure 1 switch x controls the connection and disconnection between the AC / DC conversion unit 14 and the power grid.

[0040] DC conversion units 15(1 - n) are located between the DC bus and the batteries to be charged and are used to convert between DC and DC. They are usually used in conjunction with disconnect switches. For example, Figure 1 switches (1 - n) respectively control the connection and disconnection between the DC conversion units 15(1 - n) and the batteries to be charged (1 - n).

[0041] Based on the above battery charging system, an embodiment of the present application further provides a battery charging method, which is used to specifically describe the process executed by the energy management unit in the battery charging system. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer - executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0042] Figure 2 is a schematic flowchart of an optional battery charging method according to an embodiment of the present application. As shown in Figure 2 it, the method at least includes steps S202 - S206, where:

[0043] Step S202: Obtain the first quantity of the batteries to be replaced and the first power information of each battery to be replaced. The first power information is used to determine the target charging state of the batteries to be charged for replacing the batteries to be replaced.

[0044] As an optional implementation manner, the energy management unit can obtain the first quantity of the batteries to be replaced from the cloud platform data center through the communication unit and obtain the first power information of each battery to be replaced. Among them, the cloud platform data center is used to manage battery information, and the first power information at least includes one of the following: the first state of charge, the first voltage.

[0045] Specifically, the operation and maintenance personnel can input the site address of the battery to be replaced in the client or interactive interface. Since it is necessary to ensure that the SOC of the new and old batteries is the same when replacing the battery, the energy management unit will obtain the first quantity, the first state of charge, and the first voltage of the battery to be replaced from the cloud platform data center. The first quantity is used to determine the number of batteries to be charged for replacing the battery to be replaced, and the first state of charge and the first voltage can be used to determine the target charging state of the battery to be charged.

[0046] Step S204: Obtain the second power information of each battery to be charged among the first quantity of batteries to be charged.

[0047] Specifically, the energy management unit can determine the same number of batteries to be charged as the battery to be replaced, and obtain the second power information of each battery to be charged through the communication interface connected to the battery to be charged. The second power information includes at least one of the following: the second state of charge, the second voltage.

[0048] Step S206: Determine the target charging mode of each battery to be charged based on the first quantity and the second power information, and charge each battery to be charged based on the target charging mode and the target charging state. The target charging mode includes at least one of the following: batteries charge each other, the grid charges the battery, the battery discharges to the grid.

[0049] Among them, the energy flow in the battery-to-battery (BtoB) mode is as Figure 3 shown. Among them, switch x is disconnected, and switches (1 to n) are closed. The batteries to be charged (1 to n) perform charge and discharge operations through the DC conversion units 15(1 to n); the energy flow in the grid-to-battery (GtoB) mode is as Figure 4 shown. Among them, switch x and switches (1 to n) are both closed. The grid charges the batteries to be charged (1 to n) through the AC-DC conversion unit 14 and the DC conversion units 15(1 to n); the energy flow in the battery-to-grid (BtoG) mode is as Figure 5 shown. Among them, switches (1 to n) and switch x are both closed. The batteries to be charged (1 to n) discharge to the grid through the DC conversion units 15(1 to n) and the AC-DC conversion unit 14.

[0050] In some alternative embodiments of the present application, the energy management unit may first determine the target charging mode of each battery to be charged according to the number of batteries to be charged and the current second power information, then determine the target charging state of each battery to be charged according to the first power information of the corresponding battery to be replaced, and then charge the battery to be charged in the target charging mode. It should be noted that when actually charging the battery to be charged, the target charging mode is not limited to the above single charging mode, but multiple charging modes can be used in combination.

[0051] Specifically, when the first number of batteries to be charged is equal to one, and the first power information obtained at least includes the first state of charge, and the second power information at least includes the second state of charge, the battery to be charged can be charged in the following manner:

[0052] Determine that the target charging state of the battery to be charged is the first state of charge of the battery to be replaced; determine whether the second state of charge of the battery to be charged is equal to zero; when the second state of charge is equal to zero, charge the battery to be charged from the power grid until the state of charge of the battery to be charged reaches the target charging state; when the second state of charge is greater than zero, control the battery to be charged to discharge to the power grid until the state of charge of the battery to be charged is equal to zero, and then charge the battery to be charged from the power grid until the state of charge of the battery to be charged reaches the target charging state.

[0053] Figure 6 Fig. shows a schematic flow chart for charging a single battery to be charged. Assume that the first state of charge of the battery to be replaced is SOC′, and the second state of charge of the battery to be charged is SOC. First, determine whether SOC is equal to 0 or greater than 0. If SOC = 0, directly charge the battery to be charged from the power grid based on the GtoB mode until SOC = SOC′; if SOC > 0, first discharge the battery to be charged to the power grid based on the BtoG mode until SOC = 0, and then charge the battery to be charged from the power grid based on the GtoB mode until SOC = SOC′.

[0054] Optionally, when the first number of batteries to be charged is greater than one, and the first power information obtained at least includes the first state of charge, and the second power information at least includes the second state of charge, the battery to be charged can be charged in the following manner:

[0055] First, divide all the batteries to be charged into a first battery group and a second battery group. The first battery group includes a first battery to be charged, and the second battery group includes a second battery to be charged. Charge the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charging state. When the number of the second batteries to be charged in the second battery group is greater than one, re-obtain the second power information of the second batteries to be charged, and repeat the grouping and charging for the second batteries to be charged until there is only the last battery to be charged left. For the last battery to be charged, charge it through the power grid until the power of the last battery to be charged reaches the target charging state.

[0056] Among them, when grouping multiple batteries to be charged, all the batteries to be charged can be sorted first based on the magnitude of the second state of charge of each battery to be charged, and then the batteries to be charged are divided into a first battery group and a second battery group based on the sorting result. Among them, the sum of the second state of charge of the first batteries to be charged in the first battery group does not exceed the sum of the second state of charge of the second batteries to be charged in the second battery group.

[0057] For example, the first states of charge of N (N≥2) batteries to be replaced are SOC′1, …, SOC′ n , and the corresponding second states of charge of N batteries to be charged are SOC1, …, SOC n . First, sort SOC1, …, SOC n from small to large or from large to small, and then divide them into two groups, A and B, that is, N = N A + N B . Let the sum of the second state of charge of the batteries in group A not exceed the sum of the second state of charge of the batteries in group B, that is, sum(SOC A ) ≤ sum(SOC B ). Usually, the dichotomy method can be used to divide the N batteries to be charged after sorting, that is, N A = N B or N A + 1 = N B .

[0058] When charging the first battery to be charged through the second battery to be charged, the target charging state of each battery to be charged can be determined first as the first state of charge of the battery to be replaced corresponding to the battery to be charged. For each first battery to be charged, control the first battery to be charged to discharge to the second battery to be charged until the state of charge of the first battery to be charged is equal to zero. Then control the second battery to be charged to charge the first battery to be charged until the state of charge of the first battery to be charged reaches the target charging state.

[0059] When replenishing the last battery to be replenished through the power grid, the replenishment process of a single battery to be replenished can be referred to. When the current second state of charge of the last battery to be replenished is equal to zero, the last battery to be replenished is charged through the power grid until the state of charge of the last battery to be replenished reaches the target replenishment state; when the current second state of charge of the last battery to be replenished is greater than zero, the last battery to be replenished is controlled to discharge to the power grid until the state of charge of the last battery to be replenished is equal to zero; then the last battery to be replenished is charged through the power grid until the state of charge of the last battery to be replenished reaches the target replenishment state.

[0060] Through such a grouped replenishment method, while reducing the replenishment operation and maintenance time, it can be ensured as much as possible that when the first battery to be replenished discharges to the second battery to be replenished, all the electric energy can be transferred to the second battery to be replenished without discharging to the power grid again; when the second battery to be replenished charges the first battery to be replenished, it can directly reach the target replenishment state without drawing power from the power grid again, thereby reducing the loss of electric energy from the power grid and lowering the electricity cost. Of course, in case of some extreme situations, the replenishment operation can be continued in the following way.

[0061] Optionally, the initial second state of charge of some first batteries to be replenished may be equal to zero, so there is no need to discharge to the second battery to be replenished, and the second battery to be replenished directly charges the first battery to be replenished until it reaches the target replenishment state.

[0062] Optionally, when controlling the first battery to be replenished to discharge to the second battery to be replenished, if the state of charge of the second battery to be replenished is full but the state of charge of the first battery to be replenished is still greater than zero, the first battery to be replenished is controlled to continue discharging to the power grid until the state of charge of the first battery to be replenished is equal to zero.

[0063] Optionally, when controlling the second battery to be replenished to charge the first battery to be replenished, if the state of charge of the second battery to be replenished is equal to zero but the state of charge of the first battery to be replenished still has not reached the target replenishment state, the first battery to be replenished is continuously charged through the power grid until the state of charge of the first battery to be replenished reaches the target replenishment state.

[0064] Figure 7 Fig. shows a schematic flow chart for replenishing multiple batteries to be replenished. First, the second state of charge SOC of N batteries to be replenished (1～n) is sorted and divided into two groups, group A and group B; based on the BtoB mode, the batteries in group A discharge to the batteries in group B until the state of charge of all the batteries in group A is equal to zero, i.e., SOC A =0; then, based on the BtoB mode, the batteries in group B charge the batteries in group A until the state of charge of all the batteries in group A reaches the target replenishment state, i.e., SOC A =SOC'A The battery replenishment of Group A is completed. If the number of batteries to be replenished in Group B is still greater than 1, obtain the second state of charge of the batteries in Group B again, and repeat the above grouping replenishment operation for the batteries in Group B until there is only one battery to be replenished in Group B. For this last battery to be replenished, its replenishment can be carried out with reference to the replenishment process of a single battery to be replenished.

[0065] In some optional embodiments of the present application, after the battery to be replenished is replenished, the energy management unit can send a notification message to the cloud platform data center through the communication unit. This notification message is used to notify the target object that the battery to be replenished has been replenished and the battery to be replaced can be replaced.

[0066] In the embodiments of the present application, first, obtain the first quantity of the batteries to be replaced and the first state of charge information of each battery to be replaced. This first state of charge information is used to determine the target state of charge of the battery to be replenished for replacing the battery to be replaced. At the same time, obtain the second state of charge information of each battery to be replenished among the first quantity of batteries to be replenished. Then, determine the target replenishment mode for each battery to be replenished based on the first quantity and the second state of charge information. The target replenishment mode includes: batteries replenishing each other, the power grid charging the batteries, and the batteries discharging to the power grid. Finally, replenish each battery to be replenished based on the target replenishment mode and the target state of charge. Among them, by obtaining the relevant information of the batteries online, it is possible to avoid the operation and maintenance personnel from going back and forth to the site to confirm the replenishment data, reducing the operation and maintenance cost. Automatically select the replenishment mode based on the relevant information of the batteries to replenish the batteries, and give priority to the batteries replenishing each other. The process is simple and can reduce the electricity cost, thus solving the technical problems in the related art that the process of replenishing new batteries is relatively cumbersome when the battery system fails, and the operation and maintenance cost and the electricity cost are relatively high.

[0067] Embodiment 21]

[0068] According to the embodiments of the present application, there is also provided a battery replenishment device for implementing the above battery replenishment method, as Figure 8 shown. The device at least includes a first acquisition module 81, a second acquisition module 82, and a replenishment module 83, where:

[0069] The first acquisition module 81 is used to acquire the first quantity of the batteries to be replaced and the first state of charge information of each battery to be replaced. The first state of charge information is used to determine the target state of charge of the battery to be replenished for replacing the battery to be replaced.

[0070] Specifically, the first acquisition module can obtain the first quantity of the batteries to be replaced and the first power information of each battery to be replaced from the cloud platform data center through the communication unit. The cloud platform data center is used to manage battery information. The first power information includes at least one of the following: the first state of charge, the first voltage. For example, the operation and maintenance personnel can input the site address of the batteries to be replaced in the client or the interaction interface. Since it is necessary to ensure that the SOC of the new and old batteries is the same when replacing the batteries, the first acquisition module will obtain the first quantity, the first state of charge and the first voltage of the batteries to be replaced from the cloud platform data center. The first quantity is used to determine the quantity of the batteries to be charged for the batteries to be replaced, and the first state of charge and the first voltage can be used to determine the target charging state of the batteries to be charged.

[0071] The second acquisition module 82 is configured to obtain the second power information of each battery to be charged among the first quantity of batteries to be charged.

[0072] Specifically, the second acquisition module can determine the same quantity of batteries to be charged as the batteries to be replaced, and obtain the second power information of each battery to be charged through the communication interface connected to the batteries to be charged. The second power information includes at least one of the following: the second state of charge, the second voltage.

[0073] The charging module 83 is configured to determine the target charging mode of each battery to be charged based on the first quantity and the second power information, and charge each battery to be charged based on the target charging mode and the target charging state. The target charging mode includes at least one of the following: charging between batteries, charging the battery from the power grid, discharging the battery to the power grid.

[0074] In some optional embodiments of the present application, the charging module can first determine the target charging mode of each battery to be charged according to the quantity of the batteries to be charged and the current second power information, then determine the target charging state of each battery to be charged according to the first power information of the corresponding battery to be replaced, and then charge the battery to be charged in the target charging mode. It should be noted that when actually charging the battery to be charged, the target charging mode is not limited to the above single charging mode, but multiple charging modes can be used in combination.

[0075] Specifically, when the first quantity of the batteries to be charged is equal to one, and the first power information obtained includes at least the first state of charge, and the second power information includes at least the second state of charge, the battery to be charged can be charged in the following manner:

[0076] Determine that the target charging state of the battery to be charged is the first state of charge of the battery to be replaced; determine whether the second state of charge of the battery to be charged is equal to zero; when the second state of charge is equal to zero, charge the battery to be charged through the power grid until the state of charge of the battery to be charged reaches the target charging state; when the second state of charge is greater than zero, control the battery to be charged to discharge to the power grid until the state of charge of the battery to be charged is equal to zero, and then charge the battery to be charged through the power grid until the state of charge of the battery to be charged reaches the target charging state.

[0077] Optionally, when the first quantity of the batteries to be charged is greater than one, the first quantity information obtained includes at least the first state of charge, and the second quantity information includes at least the second state of charge. The batteries to be charged can be charged in the following manner:

[0078] First, divide all the batteries to be charged into a first battery group and a second battery group. The first battery group includes the first battery to be charged, and the second battery group includes the second battery to be charged. Charge the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charging state. When the quantity of the second batteries to be charged in the second battery group is greater than one, re-obtain the second quantity information of the second batteries to be charged, and repeat the grouping and charging for the second batteries to be charged until there is only the last battery to be charged left. For the last battery to be charged, charge the last battery to be charged through the power grid until the power of the last battery to be charged reaches the target charging state.

[0079] Among them, when grouping multiple batteries to be charged, all the batteries to be charged can be sorted first based on the magnitude of the second state of charge of each battery to be charged, and then the batteries to be charged are divided into a first battery group and a second battery group based on the sorting result. Among them, the sum of the second state of charge of the first batteries to be charged in the first battery group does not exceed the sum of the second state of charge of the second batteries to be charged in the second battery group.

[0080] When charging the first battery to be charged through the second battery to be charged, it can be first determined that the target charging state of each battery to be charged is the first state of charge of the battery to be replaced corresponding to the battery to be charged. For each first battery to be charged, control the first battery to be charged to discharge to the second battery to be charged until the state of charge of the first battery to be charged is equal to zero. Then control the second battery to be charged to charge the first battery to be charged until the state of charge of the first battery to be charged reaches the target charging state.

[0081] When charging the last battery to be charged through the power grid, the charging process of a single battery to be charged can be referred to. When the current second state of charge of the last battery to be charged is equal to zero, charge the last battery to be charged through the power grid until the state of charge of the last battery to be charged reaches the target charging state; when the current second state of charge of the last battery to be charged is greater than zero, control the last battery to be charged to discharge to the power grid until the state of charge of the last battery to be charged is equal to zero; then charge the last battery to be charged through the power grid until the state of charge of the last battery to be charged reaches the target charging state.

[0082] Through such a grouped charging method, while reducing the charging operation and maintenance time, it is possible to ensure that when the first battery to be charged discharges to the second battery to be charged, all the power can be transferred to the second battery to be charged without discharging to the power grid again; when the second battery to be charged charges the first battery to be charged, it can directly reach the target charging state without drawing power from the power grid, thereby reducing the power loss of the power grid and lowering the electricity cost. Of course, in case of some extreme situations, the charging operation can be continued in the following way.

[0083] Optionally, the initial second state of charge of some first batteries to be charged may be equal to zero, so there is no need to discharge to the second battery to be charged, and the second battery to be charged can directly charge the first battery to be charged until it reaches the target charging state.

[0084] Optionally, when controlling the first battery to be charged to discharge to the second battery to be charged, if the state of charge of the second battery to be charged is full but the state of charge of the first battery to be charged is still greater than zero, control the first battery to be charged to continue discharging to the power grid until the state of charge of the first battery to be charged is equal to zero.

[0085] Optionally, when controlling the second battery to be charged to charge the first battery to be charged, if the state of charge of the second battery to be charged is equal to zero but the state of charge of the first battery to be charged has not reached the target charging state yet, charge the first battery to be charged through the power grid until the state of charge of the first battery to be charged reaches the target charging state.

[0086] In some alternative embodiments of the present application, the above battery charging device further includes a notification module 84, which is used to send a notification message to the cloud platform data center through the communication unit after the battery to be charged is fully charged. The notification message is used to notify the target object that the battery to be charged has been fully charged and the battery to be replaced can be replaced.

[0087] It should be noted that each module in the battery charging device in the embodiments of the present application corresponds one-to-one to each implementation step of the battery charging method in Embodiment 1. Since detailed descriptions have been made in Embodiment 1, details not shown in this embodiment can be referred to Embodiment 1 and will not be elaborated here.

[0088] Embodiment 3

[0089] According to an embodiment of the present application, a non-volatile storage medium is further provided. The non-volatile storage medium includes a stored program, wherein when the program runs, it controls the device where the non-volatile storage medium is located to execute the battery charging method in Embodiment 1.

[0090] According to an embodiment of the present application, a processor is further provided. The processor is used to run a program, wherein when the program runs, it executes the battery charging method in Embodiment 1.

[0091] According to an embodiment of the present application, a battery charging device is further provided. The battery charging device includes: a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the battery charging method in Embodiment 1 through the computer program.

[0092] Optionally, when the program runs, it executes the following steps: obtaining the first quantity of the batteries to be replaced and the first battery power information of each battery to be replaced, where the first battery power information is used to determine the target charging state of the battery to be charged for replacing the battery to be replaced; obtaining the second battery power information of each battery to be charged among the first quantity of batteries to be charged; determining the target charging mode of each battery to be charged based on the first quantity and the second battery power information, and charging each battery to be charged based on the target charging mode and the target charging state, where the target charging mode includes at least one of the following: charging between batteries, charging the battery from the power grid, and discharging the battery to the power grid.

[0093] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0094] In the above embodiments of the present application, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in electrical or other forms.

[0096] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0098] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks or optical discs that can store program codes.

[0099] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A battery charging method, characterized in that, Including: Obtaining a first quantity of batteries to be replaced and first power information of each of the batteries to be replaced, where the first power information is used to determine a target charging state of a battery to be charged for replacing the battery to be replaced; Obtaining second power information of each of the batteries to be charged among the first quantity of batteries to be charged; Determining a target charging mode for each of the batteries to be charged based on the first quantity and the second power information, and charging each of the batteries to be charged based on the target charging mode and the target charging state, where the target charging mode includes at least one of the following: batteries charging each other, the power grid charging the battery, and the battery discharging to the power grid; Wherein, the first quantity is greater than one. Determining a target charging mode for each of the batteries to be charged based on the first quantity and the second power information, and charging each of the batteries to be charged based on the target charging mode and the target charging state includes: dividing the batteries to be charged into a first battery group and a second battery group, where the first battery group includes a first battery to be charged, and the second battery group includes a second battery to be charged; charging the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charging state; when the quantity of the second batteries to be charged in the second battery group is greater than one, re-obtaining the second power information of the second batteries to be charged, and repeating grouping and charging for the second batteries to be charged until there is a last battery to be charged left; for the last battery to be charged, charging the last battery to be charged through the power grid until the power of the last battery to be charged reaches the target charging state.

2. The method according to claim 1, wherein Dividing the batteries to be charged into a first battery group and a second battery group includes: Sorting all the batteries to be charged based on the magnitudes of the second state of charge of each of the batteries to be charged, and dividing the batteries to be charged into the first battery group and the second battery group based on the sorting result, where the sum of the second state of charge of the first batteries to be charged in the first battery group does not exceed the sum of the second state of charge of the second batteries to be charged in the second battery group.

3. The method according to claim 1, characterized in that, The first power information includes at least a first state of charge, and the second power information includes at least a second state of charge. Charging the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charging state includes: Determining the target charging state of each of the batteries to be charged as the first state of charge of the battery to be replaced corresponding to the battery to be charged; For each of the first batteries to be charged, controlling the first battery to be charged to discharge to the second battery to be charged until the state of charge of the first battery to be charged is equal to zero; then controlling the second battery to be charged to charge the first battery to be charged until the state of charge of the first battery to be charged reaches the target charging state.

4. The method according to claim 2, wherein Recharging the last battery to be recharged through the power grid until the power of the last battery to be recharged reaches the target recharging state, including: When the current second state of charge of the last battery to be recharged is equal to zero, charging the last battery to be recharged through the power grid until the state of charge of the last battery to be recharged reaches the target recharging state; When the current second state of charge of the last battery to be recharged is greater than zero, controlling the last battery to be recharged to discharge to the power grid until the state of charge of the last battery to be recharged is equal to zero; then charging the last battery to be recharged through the power grid until the state of charge of the last battery to be recharged reaches the target recharging state.

5. The method according to claim 3, wherein The method further includes: When controlling the first battery to be recharged to discharge to the second battery to be recharged, if the state of charge of the second battery to be recharged is full but the state of charge of the first battery to be recharged is still greater than zero, controlling the first battery to be recharged to continue discharging to the power grid until the state of charge of the first battery to be recharged is equal to zero.

6. The method according to claim 3, characterized in that, The method further includes: When controlling the second battery to be recharged to charge the first battery to be recharged, if the state of charge of the second battery to be recharged is equal to zero but the state of charge of the first battery to be recharged has not reached the target recharging state, charging the first battery to be recharged through the power grid continuously until the state of charge of the first battery to be recharged reaches the target recharging state.

7. The method according to claim 1, wherein Obtaining the first quantity of the batteries to be replaced and the first power information of each of the batteries to be replaced, including: Obtaining the first quantity of the batteries to be replaced from the cloud platform data center and obtaining the first power information of each of the batteries to be replaced, wherein the cloud platform data center is used to manage battery information, and the first power information includes at least one of the following: the first state of charge, the first voltage.

8. The method according to claim 1, characterized in that, Obtaining the second power information of each of the batteries to be recharged among the first quantity of the batteries to be recharged, including: Obtaining the second power information of each of the batteries to be recharged through the communication interface connected to the batteries to be recharged, and the second power information includes at least one of the following: the second state of charge, the second voltage.

9. The method according to claim 1, characterized in that The method further includes: After the batteries to be recharged are recharged, sending a notification message, which is used to notify the target object that the batteries to be recharged have been recharged and the batteries to be replaced can be replaced.

10. A battery charging supplementing device, characterized in that, Including: A first obtaining module, configured to obtain the first quantity of the batteries to be replaced and the first power information of each of the batteries to be replaced, and the first power information is used to determine the target recharging state of the batteries to be recharged for replacing the batteries to be replaced; A second obtaining module, configured to obtain the second power information of each of the batteries to be recharged among the first quantity of the batteries to be recharged; The charging replenishment module is used to determine the target charging replenishment mode for each battery to be charged based on the first quantity and the second battery power information, and perform charging replenishment for each battery to be charged based on the target charging replenishment mode and the target charging state, where the target charging replenishment mode includes at least one of the following: mutual charging between batteries, grid charging the battery, and the battery discharging to the grid; wherein, the first quantity is greater than one, and the charging replenishment module is used to divide the batteries to be charged into a first battery group and a second battery group, the first battery group includes a first battery to be charged, and the second battery group includes a second battery to be charged; charge the first battery to be charged through the second battery to be charged until the power of the first battery to be charged reaches the target charging state; when the number of the second batteries to be charged in the second battery group is greater than one, re-acquire the second battery power information of the second batteries to be charged, and repeat grouping and charging for the second batteries to be charged until there is only the last battery to be charged left; for the last battery to be charged, charge the last battery to be charged through the grid until the power of the last battery to be charged reaches the target charging state.

11. A battery charging supplementary system, characterized in that, Comprising: An energy management unit, configured to execute the battery charging replenishment method according to any one of claims 1 to 9; A communication unit, configured to establish a communication connection between the energy management unit and the cloud platform data center; A communication interface, configured to establish a communication connection between the energy management unit and the batteries to be charged; An AC-DC conversion unit, located between the grid and the DC bus, for performing conversion between AC and DC; A DC conversion unit, located between the DC bus and the batteries to be charged, for performing conversion between DC and DC.

12. A battery charging supplementary device, characterized in that, Comprising: A memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the battery charging replenishment method according to any one of claims 1 to 9 through the computer program.

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