Charging device and energy storage type charging device

Abstract

The invention relates to a charging device and an energy storage type charging device.The charging device comprises a first charging module, a second charging module and a charging interface module, one end of the first charging module is connected with a first direct current interface unit, and the other end of the first charging module is connected with a second direct current interface unit; the first energy storage module is used for converting electric energy stored by the first energy storage module and transmitting the electric energy to the second energy storage module; the charging interface module also comprises an AC input interface used for connecting an AC power supply. The first end of the second charging module is connected with the AC input interface, the second end is connected with the first DC interface unit, and the second charging module is used for converting AC electric energy into DC electric energy and outputting the DC electric energy to the first DC interface unit to charge the first energy storage module; and the second charging module is also used for converting the alternating-current electric energy into direct-current electric energy and transmitting the direct-current electric energy to the second direct-current interface unit so as to charge the second energy storage module. When a garden team goes out to work, energy can be supplemented for the battery pack at any time by carrying the charging module, and the problem of electric anxiety is solved.

Description

Charging device and energy storage charging device

[0001] This application claims priority to the Chinese patent application with application number "CN202210457481.3" and application date of 2022.04.28 and the Chinese patent application with application number "CN202211058090.0" and application date of 2022.08.31. Technical Field

[0002] The present invention relates to the field of charging, and in particular to a charging device and an energy storage type charging device. Background Art

[0003] Fuel-powered tools offer advantages such as high power, easy access to power sources, and long operating times. Professional gardening teams often use fuel-powered tools for outdoor work to improve efficiency. However, the exhaust gases released by these tools can cause environmental pollution, and the noise generated by fuel-powered tools can also contribute to noise pollution in the surrounding environment.

[0004] Electric tools are environmentally friendly and clean, and compared with fuel-powered tools, they also produce relatively less noise. Therefore, electric tools are becoming more and more popular among power tool users.

[0005] With the development of lithium battery technology, the tool industry has gradually transitioned from gasoline tools and AC power tools to DC power tools, and lithium batteries have become widely used in the tool industry. Typically, professional gardening teams carry a variety of gardening tools for a day's work. The workday is long and the workload is heavy, requiring almost a full day of continuous work. Lithium batteries are typically recharged by using a charger to convert mains electricity into DC power. However, mains electricity is difficult to obtain when gardening teams are working outdoors, making charging difficult. If they want to use power tools, they have to carry a large number of battery packs, which results in high battery costs and inconvenience for the gardening teams to carry.

[0006] Summary of the Invention

[0007] Based on this, we hereby provide an energy storage charging device, which includes a first charging module, a second charging module and a charging interface module; the charging interface module includes at least a first DC interface unit and a second DC interface unit, the first DC interface unit being used to connect to the first energy storage module, and the second DC interface unit being used to connect to the second energy storage module; a first end of the first charging module is connected to the first DC interface unit, and a second end of the first charging module is connected to the second DC interface unit, and the first charging module is used to convert the electric energy stored in the first energy storage module and transmit it to the second energy storage module, so that the first energy storage module charges the second energy storage module; the charging interface module also includes an AC input interface, which is used to connect to an AC power source; a first end of the second charging module is connected to the AC input interface, and a second end of the second charging module is connected to the first DC interface unit, and the second charging module is used to convert AC power into DC power and output it to the first DC interface unit to charge the first energy storage module; the second charging module is also used to convert the AC power into DC power and transmit it to the second DC interface unit without passing through the first energy storage module, so as to charge the second energy storage module.

[0008] In one embodiment, the output end of the second charging module is connected to the first charging module, so that the DC power is transmitted to the second DC interface unit through the first charging module.

[0009] In one embodiment, it further includes a control module and a switch module, wherein the switch module is connected to the control module and is used to receive a control signal from the control module so as to be turned on or off under the action of the control signal; the switch module includes a loop switch, which is arranged between the first charging module and the second DC interface unit and is used to control the on and off of the loop from the first charging module to the second DC interface unit; the switch module also includes a charging switch, one end of the charging switch is connected to the first DC interface unit, and the other end is respectively connected to the first charging module and the second charging module, and is used to control the first energy storage module to be connected to the charging device or disconnected from the charging device.

[0010] In one embodiment, the control module is configured to determine the type of input power source and control the charging method of the charging device for the second energy storage module based on the type of input power source, wherein the input power source includes the AC power source and the first energy storage module. When the control module determines that both the AC power source and the first energy storage module are connected, the control module further obtains the requested charging power of the second energy storage module and determines whether the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module. When the requested charging power of the second energy storage module is less than the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed simultaneously, and controls the AC power source to charge the second energy storage module and the first energy storage module simultaneously. When the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed simultaneously, and controls the AC power source and the first energy storage module to charge the second energy storage module simultaneously. When the requested charging power of the second energy storage module is equal to the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed sequentially, and controls the AC power source to charge the second energy storage module and the first energy storage module sequentially.

[0011] In one embodiment, the rated power of the second energy storage module is less than the rated power of the first energy storage module; when the control module controls the AC power supply to charge the second energy storage module and the first energy storage module in sequence, the control module first controls the loop switch to close to charge the second energy storage module. When the control module determines that the second energy storage module is fully charged, the control module controls the charging switch to close to charge the first energy storage module.

[0012] In one embodiment, when the control module determines that only the first energy storage module is connected, the control module controls the loop switch and the charging switch to be closed, so that the first energy storage module charges the second energy storage module; when the control module determines that only the AC power supply is connected, the control module controls the loop switch to be closed and the charging switch to be disconnected, so that the AC power supply charges the second energy storage module.

[0013] In one embodiment, the output end of the second charging module is connected to the second DC interface unit so as to directly transmit the DC power to the second DC interface unit.

[0014] In one embodiment, the first charging module is a bidirectional charging module, and the second energy storage module is further configured to charge the first energy storage module through the first charging module.

[0015] In one embodiment, the second charging module includes a first-capacity battery pack and a second-capacity battery pack, and the rated capacity of the first-capacity battery pack is greater than the rated capacity of the second-capacity battery pack; the first charging module is also used to convert the electrical energy stored in the first-capacity battery pack and charge the second-capacity battery pack.

[0016] In one embodiment, when the charging device charges the second energy storage module, the charging device includes at least a first charging mode and a second charging mode, and the output power of a single charging interface in the second charging mode is greater than the output power of a single charging interface in the first charging mode.

[0017] In one embodiment, the second DC interface unit includes at least one charging interface, each of which is used to detachably connect to a second energy storage module; the first charging module includes at least two charging units, the input end of each charging unit is connected to the first DC interface unit and the second charging module, and the output end of each charging unit is connected to at least one charging interface.

[0018] In one embodiment, the switch module further includes a switching switch, which is arranged between adjacent charging units and is used to control the connection relationship between adjacent charging units; when the switching switch is disconnected, the output ends of at least two charging units are connected; when the switching switch is closed, the output ends of at least two charging units are disconnected.

[0019] In one embodiment, in the first charging mode, a single charging unit is used to provide electrical energy to a single second energy storage module connected thereto; in the second charging mode, the control module obtains the requested charging power of the second energy storage module, compares the requested charging power with the maximum output power of the single charging unit, and determines whether to control the switching switch to be closed based on the comparison result.

[0020] In one embodiment, when the requested charging power is less than or equal to the maximum output power of the single charging unit, the control module controls the switching switch to be disconnected so that the single charging unit charges the second energy storage module; when the requested charging power is greater than the maximum output power of the single charging unit, the control module controls the switching switch to be closed so that at least two charging units are connected in parallel to charge the single second energy storage module.

[0021] In one embodiment, the control module is configured to obtain information about an input power source, and determine whether the charging device is allowed to enter the second charging mode based on the information about the input power source.

[0022] In one embodiment, the input power source includes the AC power source and / or the first energy storage module; when the input power source is the AC power source, the control module prohibits the charging device from entering the second charging mode; when the input power source includes the first energy storage module and the remaining power of the first energy storage module is less than a preset power, the control module prohibits the charging device from entering the second charging mode; when the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power, the charging device is allowed to enter the second charging mode.

[0023] In one embodiment, when the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power, the control module obtains the temperatures of the second energy storage module and the first energy storage module, and when the temperatures of the second energy storage module and the first energy storage module meet the preset temperature conditions, allows the charging device to enter the second charging mode.

[0024] In one embodiment, a human-computer interaction module is further included, which is connected to the control module. The human-computer interaction module is used to obtain a fast charging instruction issued by a user, and the fast charging instruction is used to instruct the charging device to enter the second charging mode; when the human-computer interaction module does not receive the fast charging instruction, the control module controls the charging device to enter the first charging mode; when the human-computer interaction module receives the fast charging instruction, the control module controls the charging device to switch from the first charging mode to the second charging mode.

[0025] In one embodiment, in the first charging mode, when the control module determines that at least two of the charging units are connected to the second energy storage module, the control module is further used to obtain information about the input power supply and control the at least two charging units to charge the at least two second energy storage modules simultaneously or sequentially according to the information about the input power supply.

[0026] In one embodiment, when the input power source is the AC power source, the control module controls at least two charging units to charge the second energy storage module simultaneously; when the input power source includes the first energy storage module and the remaining power of the first energy storage module is less than a preset power value, the control module controls at least two charging units to charge the second energy storage module in sequence; when the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power value, the control module controls at least two charging units to charge the second energy storage module simultaneously.

[0027] In one embodiment, a single charging unit is connected to at least two charging interfaces; in the first charging mode, when the control module determines that the multiple charging interfaces connected to the single charging unit are all connected to the second energy storage module, the control module is further used to obtain information about the multiple second energy storage modules and information about the input power supply, and control the single charging unit to charge the multiple second energy storage modules and the first energy storage module in sequence according to a preset priority based on the information about the multiple second energy storage modules and the information about the input power supply.

[0028] In one embodiment, the second energy storage module includes a battery pack and a self-propelled tool, the battery pack is used to be detachably installed on the power tool and power the power tool, and the self-propelled tool has a built-in battery; the control module determines whether the second energy storage module connected to the charging interface module includes the battery pack and the self-propelled tool. When the second energy storage module includes the battery pack and the self-propelled tool, the control module determines whether the input power supply includes an AC power supply. When the input power supply includes the AC power supply, the charging priority of the battery pack is higher than the charging priority of the first energy storage module, and the charging priority of the first energy storage module is higher than the charging priority of the self-propelled tool; when the control module determines that the input power supply does not include the AC power supply, the charging priority of the battery pack is higher than the charging priority of the self-propelled tool.

[0029] In one embodiment, the charging interface includes at least two digital communication terminals, and the charging device is used to communicate with battery packs with different digital communication types through at least one of the digital communication terminals.

[0030] In one embodiment, the control module determines whether each of the charging interfaces is connected to the battery pack. When each of the charging interfaces is connected to the battery pack, the control module further determines the digital communication type of the battery pack connected to each charging interface, and controls the charging priority of the charging device for the multiple battery packs according to the digital communication type.

[0031] In one embodiment, the digital communication terminal of the charging device includes a serial communication terminal and a differential communication terminal. The charging device is used to communicate with a battery pack having the serial communication type through the serial communication terminal, and the charging device is used to communicate with a battery pack having the differential communication type through the differential communication terminal; the control module determines the digital communication type of the battery pack and controls the charging priority of the battery pack having the differential communication type to be higher than that of the battery pack having the serial communication type.

[0032] In one embodiment, when the control module determines that the digital communication types of the multiple battery packs are the same, it also obtains the insertion order of the multiple battery packs and controls the charging order of the battery packs by the charging device according to the insertion order.

[0033] In one embodiment, the control module also controls the output power of the charging unit according to the communication type of the battery pack connected to each charging interface; the control module determines that when the charging device communicates with the battery pack using a serial communication type, the charging power output by the charging interface is less than the charging power output by the charging interface when the charging device communicates with the battery pack using a differential communication type.

[0034] Another embodiment of the present application provides an energy storage type charging device, the energy storage type charging device further comprising a first energy storage module, the first energy storage module being connected to the charging device and configured to charge the second energy storage module via the charging device or to obtain electrical energy via the charging device. In one embodiment,

[0035] Another embodiment of the present application provides an energy storage charging device, which includes a first energy storage module, a first charging module and a charging interface module; the first energy storage module is used to store DC power; the input end of the first charging module is connected to the output end of the first energy storage module, the output end of the first charging module is connected to the charging interface module, and the charging interface module is used to connect a battery pack; the first charging module is used to transfer the electric energy of the first energy storage module to the charging interface module, and charge the battery pack connected to the charging interface module, wherein the battery pack is used to be detachably installed on an electric tool to power the electric tool; a first charging rate when the first energy storage module charges the battery pack is greater than a second charging rate when the mains electricity charges the battery pack; the ratio of the first charging rate to the second charging rate is greater than 1 and less than or equal to 10.

[0036] In one embodiment, for the same battery pack, a first charging time required by the first energy storage module to charge the battery pack from an empty state to a fully charged state is less than a second charging time required by the AC power supply to charge the battery pack from an empty state to a fully charged state.

[0037] In one embodiment, the maximum output power of the first energy storage module is greater than the maximum output power of the AC power supply.

[0038] In one embodiment, the maximum output power of the first energy storage module is greater than or equal to 1.8 kW; preferably, the maximum output power of the first energy storage module is greater than or equal to 3 kW.

[0039] In one embodiment, the rated capacity of the first energy storage module is not less than 2 KWh, and the maximum continuous discharge rate of the first energy storage module is greater than or equal to 1C, wherein the maximum continuous discharge rate is the maximum discharge rate maintained by the first energy storage module during the process of continuous discharge from the remaining capacity being greater than or equal to 80% to the remaining capacity being less than or equal to 10%.

[0040] In one embodiment, a second charging module is further included, wherein the input end of the second charging module is used to connect to an external AC power supply, and the second charging module is used to convert the electric energy of the AC power supply into DC power and charge the battery pack connected to the charging interface module; the maximum output power of the second charging module is less than 1.6KW.

[0041] In one embodiment, the first charging module includes at least a first charging unit and a second charging unit, and the charging interface module includes at least a first charging interface and a second charging interface; the input ends of the first charging unit and the second input unit are both connected to the output end of the first energy storage module and the output end of the second charging module, the output end of the first charging unit is connected to the first charging interface, and the output end of the second charging unit is connected to the second charging interface.

[0042] In one embodiment, the switch module includes at least a first switching switch, one end of the first switching switch is connected to the output end of the first charging unit, and the other end is connected to the output end of the second charging unit, for controlling the connection relationship of the charging units; when the first switching switch is closed, the output end of the first charging unit and the output end of the second charging unit are connected to each other, so that the electric energy of the first charging unit and the second charging unit are both output to the same charging interface; when the first switching switch is turned on, the output end of the first charging unit and the output end of the second charging unit are disconnected, so that the electric energy of the first charging unit is output to the first charging interface, and the electric energy of the second charging unit is output to the second charging interface; the energy storage charging device also includes a control module, which is connected to the control end of the first switching switch and is used to control the first switching switch to switch between an on state and an off state.

[0043] In one embodiment, the energy storage charging device includes at least a first charging mode and a second charging mode; when the control module controls the first switching switch to be disconnected, the energy storage charging device is in the first charging mode, and each of the charging units provides power to a single charging interface connected thereto; when the control module controls the first switching switch to be turned on, the energy storage charging device is in the second charging mode, and at least two charging units are connected in parallel to provide power to one charging interface; the maximum output power output from the charging interface to the battery pack in the first charging mode is less than the maximum output power output from the charging interface to the battery pack in the second charging mode.

[0044] In one embodiment, in the second charging mode, the maximum output power output by the charging interface to the battery pack is not less than 3.6KW.

[0045] In one embodiment, a human-computer interaction module is further included, which is connected to the control module; the control module is used to receive a fast charging instruction through the human-computer interaction module, and control the first switching switch to be turned on according to the fast charging instruction, so that the energy storage charging device enters the second charging mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is an overall structural diagram of an energy storage charging device provided by one embodiment of the present application;

[0047] FIG2 is a circuit module diagram of an energy storage charging device provided by one embodiment of the present application;

[0048] FIG3 is a circuit module diagram of an energy storage charging device provided in another embodiment of the present application;

[0049] FIG4 is a circuit module diagram of an energy storage charging device provided in another embodiment of the present application;

[0050] FIG5 is a circuit module diagram of an energy storage charging device provided in yet another embodiment of the present application;

[0051] FIG6 is a schematic diagram of a battery pack of a first capacity being plugged into a charging device to charge a battery pack of a second capacity according to an embodiment of the present application;

[0052] FIG7 is a schematic diagram of a scenario in which an energy storage charging device according to an embodiment of the present application charges a battery pack and a self-propelled tool via an adapter;

[0053] FIG8 is a schematic diagram of a scenario in which an energy storage charging device according to an embodiment of the present application charges a battery pack via a backpack;

[0054] FIG9 is a diagram showing the terminal arrangement of the energy storage charging device and the charging interface of the charger according to one embodiment of the present application;

[0055] FIG10 is a diagram showing a terminal arrangement of a charging interface of a battery pack according to an embodiment of the present application;

[0056] FIG11 is a diagram showing the terminal arrangement of the battery pack interface on the backpack body and the battery pack interface on the power tool according to one embodiment of the present application;

[0057] FIG12 is a terminal arrangement diagram of a back-rack cable interface provided by one embodiment of the present application;

[0058] FIG13 is a diagram showing the terminal arrangement of the charging and discharging interface on the main body of an energy storage self-propelled tool provided by one embodiment of the present application;

[0059] FIG14 is a flow chart of a charging control method for a charging device provided by one embodiment of the present application;

[0060] FIG15 is a flow chart of a charging control method for a charging device provided in yet another embodiment of the present application;

[0061] FIG16 is a flow chart of a charging control method for a charging device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0062] In order to solve the problem of the gardening team having difficulty obtaining a DC power supply when they work outside for a whole day, the present application provides a charging device that can transfer electrical energy from a DC energy storage module to one or more power tool battery packs, and can also use an AC power supply to recharge the DC energy storage module and multiple power tool battery packs. When the gardening team is working outside, they can place the charging device on a vehicle and move with the gardening team. At the same time, they can carry a large-capacity DC energy storage module and move from one garden to another to charge the battery packs carried by the gardening team. By carrying this mobile energy recharging device, the gardening team can alleviate the power anxiety problem of using power tools when working outside.

[0063] With reference to FIG1 , an embodiment of the present application provides a charging device 110, which can be connected to a first energy storage module 120 for converting the DC power stored in the first energy storage module 120 to charge an external device. The charging device 110 can also be connected to an AC power source to convert the power of the AC power source into DC power for charging an external device. In this embodiment, the charging device 110 and the first energy storage module 120 are detachably connected, and a first DC interface unit (not shown in FIG1 ) is provided on the charging device 110. The first energy storage module 120 can be connected to the first DC interface unit via a cable, thereby being connected to the charging device 110.

[0064] 1 and 2 , the charging device includes a first charging module 130, a second charging module 150, and a charging interface module 140. The charging interface module 140 includes at least a first DC interface unit 141 and a second DC interface unit 142. The first DC interface unit 141 is used to connect to the first energy storage module 120, and the second DC interface unit 142 is used to connect to the second energy storage module. As shown in FIG1 , the second DC interface unit 142 is disposed on the housing of the charging device 110. In this embodiment, the second energy storage module may include a power tool battery pack, which can be directly plugged into the second DC interface unit 142.

[0065] The first end of the first charging module 130 is connected to the first DC interface unit 141, and the second end of the first charging module 130 is connected to the second DC interface unit 142. The first charging module 130 is used to convert the DC power stored in the first energy storage module 120 to charge the second energy storage module. In other words, the first charging module 130 is a DCDC (Direct Current-Direct Current) module, which is used to convert the DC power stored in the first energy storage module 120 into DC power suitable for charging the second energy storage module. Typically, the first charging module 130 is used to perform voltage conversion to convert the voltage received at the input end into an output voltage compatible with the second energy storage module.

[0066] The charging interface module 140 also includes an AC input interface 143 for connecting to an AC power source. A first end of a second charging module 150 is connected to the AC input interface 143, and a second end of the second charging module 150 is connected to the first DC interface unit 141. The second charging module 150 is configured to convert electrical energy from the AC power source into DC energy and output it to the first DC interface unit 141 to charge the first energy storage module 120. This means that the second charging module 150 is an ACDC (Alternating Current-Direct Current) module.

[0067] The second charging module 150 is further configured to convert the electrical energy of the AC power source into DC electrical energy, and transmit the DC electrical energy to the second DC interface unit 142 without passing through the first energy storage module, so as to charge the second energy storage module with the DC electrical energy.

[0068] In this embodiment, the first charging module 110 includes both a DCDC charging module and an ACDC charging module, and can be connected to both a DC power supply and an AC power supply. When the gardening team goes out to work during the day and an AC power supply is not available, they can directly carry a large-capacity first energy storage module 120 and use DC power to charge the second energy storage module (such as a power tool battery pack), thereby solving the power anxiety problem of the gardening team when they go out to work. When the gardening team is not working at night, the AC power supply can be used to charge the second energy storage module and the first energy storage module that needs to be carried out as a charging power supply, so that the gardening team can carry multiple fully charged battery packs and a fully charged DC power supply when they go out to work. In addition, when using the AC power supply to charge the second energy storage module, the electric energy of the AC power supply does not need to be stored in the first energy storage module before being released to the second energy storage module, thereby not losing the life of the first energy storage module and extending the service life of the first energy storage module.

[0069] In one embodiment, the first DC interface unit 141 may include multiple first DC interfaces, which are connected in parallel to the first charging module 130 and the second charging module 150, so that the multiple first energy storage modules 120 connected to the multiple first DC interfaces are connected in parallel to achieve capacity expansion.

[0070] In one embodiment, there are multiple ways to implement the second charging module 150 charging the first energy storage module 120 and the second energy storage module:

[0071] As an example, as shown in FIG2 , the second charging module 150 can be directly connected to the first energy storage module 120 via the first DC interface unit 141, allowing an external AC power source to charge the first energy storage module 120 through the second charging module 150. The second charging module 150 is also connected to the first charging module 130, so that the AC power generated by the external AC power source is converted into DC power by the second charging module 150, and then converted into DC power suitable for charging the external second energy storage module by the first charging module 130. In this way, the external AC power source can charge the first energy storage module 120 and the second energy storage module with different rated voltages.

[0072] As another example, when the rated voltages of the second energy storage module and the first energy storage module 120 are different, the second charging module 150 may further include two ACDC modules. As shown in FIG3 , the second charging module 150 includes an ACDC1 module and an ACDC2 module. The ACDC1 module is connected to the first DC interface unit 141, and the ACDC2 module is connected to the second DC interface unit 142. Thus, an external power source charges the first energy storage module 120 through the ACDC1 module and charges the second energy storage module through the ACDC2 module. The first energy storage module 120 charges the second energy storage module through the DCDC module. It is understood that when the rated voltages of the second energy storage module and the first energy storage module 120 are the same, the second charging module 150 may also include only one ACDC module, one ACDC module connected to the first DC interface unit 141 and the second DC interface unit 142, respectively. The ACDC module charges the first energy storage module 120 and the second energy storage module in a time-sharing or simultaneous manner.

[0073] Because the rated voltage of the first energy storage module may differ from the voltage of the second energy storage module, in order to save costs and reduce the use of ACDC modules, it is preferred to adopt the embodiment shown in Figure 2, that is, the output end of the second charging module 150 is directly connected to the first DC interface unit 141 to charge the first energy storage module 120; the second charging module 150 is connected to the second energy storage module through the first charging module 130; and the first energy storage module 120 is also connected to the second energy storage module through the first charging module 130. Furthermore, with this arrangement, when the AC power source charges the second energy storage module, the electrical energy does not need to pass through the first energy storage module 120, thereby reducing the number of charge and discharge times of the first energy storage module 120 and increasing the service life of the first energy storage module 120.

[0074] In one embodiment, as shown in FIG4 , the charging device further includes a control module (not shown in FIG4 ) and a switch module 160 . The switch module 160 is connected to the control module and is configured to receive control signals from the control module to switch the circuit on or off in response to the control signals. The switch module 160 includes a loop switch 161 , which is disposed between the first charging module 130 and the second DC interface unit 142 and is configured to control the connection and disconnection of the circuit from the first charging module 130 to the second DC interface unit 142 . The switch module 160 also includes a charging switch 162 , one end of which is connected to the first DC interface unit 141 and the other end of which is respectively connected to the first charging module 130 and the second charging module 150 , and is configured to control the connection and disconnection of the first energy storage module 120 from the charging device 110 . Furthermore, the control module is configured to detect the type of input power to the charging device and, based on the type of input power, control the opening and closing of the loop switch 161 and the switching switch 162 to switch the input power source for charging the second energy storage module. The input power source includes an external AC power source and / or the first energy storage module 120 . It should be noted that the first energy storage module 120 can be used as both an input power source for the charging device 110 and an electrical device that receives electrical energy through the charging device 110 .

[0075] When the control module determines that both the AC power source and the first energy storage module 120 are connected, the control module primarily controls the AC power source to charge the second energy storage module. If the AC power source has sufficient power, it can also charge the first energy storage module 120. Specifically, in this embodiment, since the second energy storage module is a battery pack for user use, to avoid long wait times for energy and the impact on user work efficiency, the control module prioritizes responding to the second energy storage module's charging power request and controls the AC power source to charge the second energy storage module first.

[0076] The control unit obtains the requested charging power of the second energy storage module and determines whether the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module 150. When the requested charging power of the second energy storage module is less than the maximum output power of the second charging module 150, the control module controls the charging switch 162 and the loop switch 161 to close simultaneously, and controls the AC power supply to simultaneously charge the second energy storage module and the first energy storage module 120. This allows the AC power supply to charge the first energy storage module simultaneously when there is sufficient power to charge the second energy storage module, maximizing the use of the AC power supply's output power and improving charging efficiency.

[0077] When the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module 150, the control module controls the charging switch 162 and the loop switch 161 to close simultaneously, and controls the AC power supply and the first energy storage module 120 to charge the second energy storage module simultaneously. That is, when the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module 150, because the AC power supply cannot meet the charging demand of the second energy storage module, the control module controls the AC power supply and the first energy storage module 120 to charge the second energy storage module simultaneously. When the second energy storage module is fully charged, the control module controls the loop switch 161 to open and controls the charging switch 162 to close, allowing the AC power supply to charge the first energy storage module 120.

[0078] When the requested charging power of the second energy storage module is equal to the maximum output power of the second charging module, the control module controls the loop switch 161 and the charging switch 162 to be closed in sequence, and controls the AC power supply to charge the second energy storage module and the first energy storage module 120 in sequence.

[0079] Preferably, the rated capacity of the second energy storage module is lower than that of the first energy storage module. Since the second energy storage module is a battery pack for user use, has a lower rated capacity, and charges faster, the control module first controls the circuit switch 161 to close and the charging switch 162 to open, allowing the AC power source to charge the second energy storage module first. When the second energy storage module is fully charged, the control module then controls the charging switch 162 to close and the circuit switch 161 to open, allowing the AC power source to charge the first energy storage module 120.

[0080] Furthermore, when the control module determines that the input power source includes only the first energy storage module 120, the control module controls the circuit switch 161 and the charging switch 162 to close, so that the first energy storage module 120 charges the second energy storage module. When the control module determines that the input power source includes only the AC power source, the control module controls the circuit switch 161 to close and the charging switch 162 to open, so that the AC power source charges the second energy storage module.

[0081] As another example, when the input power source includes an external AC power source, regardless of whether the input power source includes the first energy storage module 120 , the external AC power source is used to charge the second energy storage module to save power in the first energy storage module 120 .

[0082] In one embodiment, the second energy storage module can also charge the first energy storage module 120 via the first charging module 130. That is, the first charging module 130 is a bidirectional DC-DC charging module. The first energy storage module 120 can charge the second energy storage module via this DC-DC charging module, and the second energy storage module can also charge the first energy storage module 120 via this DC-DC module. In this embodiment, the second energy storage module can be a battery pack or a self-propelled vehicle. Preferably, since the self-propelled vehicle stores a large amount of power, after the self-propelled vehicle completes its work in the garden, it can be used to charge the first energy storage module 120.

[0083] In one embodiment, as shown in FIG6 , when the second energy storage module is a battery pack, the battery pack includes a first capacity battery pack 211 and a second capacity battery pack 212 , wherein the rated capacity of the first capacity battery pack 211 is greater than the rated capacity of the second capacity battery pack 212 . Both the first capacity battery pack 211 and the second capacity battery pack 212 can be directly plugged into the second DC interface unit 142 , so that the charging device 110 can charge the first capacity battery pack 211 and the second capacity battery pack 212 when connected to a DC power source or an AC power source. In this embodiment, the first charging module 130 is also used to convert the stored electrical energy of the first capacity battery pack 211 and charge the second capacity battery pack 212 .

[0084] Specifically, when a gardening team goes out to work, they usually carry several large-capacity first-capacity battery packs 211 and several small-capacity second-capacity battery packs 212. The rated capacity of the first-capacity battery pack 211 is not less than twice the rated capacity of the second-capacity battery pack 212. Preferably, the rated capacity of the first-capacity battery pack 211 is 2 to 3 times the rated capacity of the second-capacity battery pack 212. Since the rated capacity of the second-capacity battery pack 212 is less than that of the first-capacity battery pack 211, the weight of the second-capacity battery pack 212 is also less than that of the first-capacity battery pack 211. Therefore, the first-capacity battery pack 211 is used to be installed on a lawn mower to power the lawn mower, and the user does not need to directly bear the weight of the first-capacity battery pack 211. The second-capacity battery pack 212 is used to be installed on handheld power tools, such as lawn mowers, pruners, and hair dryers. After the user completes the mowing work with the lawn mower, the lawn mower, pruner, and hair dryer can be used to complete other tasks. When the second capacity battery pack 212 is exhausted and the charging device 110 is not connected to the first energy storage module 120 and the external AC power supply, the user can also recharge the second capacity battery pack 212 through the first capacity battery pack 211. At this time, the control module controls the charging switch 162 to be disconnected and controls the loop switch 161 to be closed, so that the first capacity battery pack 211 can charge the second capacity battery pack 212.

[0085] In one embodiment, the charging interface module further includes a third DC interface unit, which primarily functions as a DC input interface for connecting to an external DC power source, thereby charging the first energy storage module 120 and the second energy storage module via the external DC power source. Specifically, the external DC power source can be a solar power source. When the gardening team is working outside, the solar power source can be used to charge the first energy storage module 120 and the battery pack, thereby allowing the gardening team to recharge during daytime hours. When using an external DC power source for energy replenishment, the external DC power source can preferably first charge the second energy storage module connected to the energy storage charging device. Once the second energy storage module is fully charged, the first energy storage module 120 can then be charged.

[0086] In one embodiment, the second charging module 150 can also be directly connected to the charging interface module 140, so that the DC power converted by the second charging module 150 is directly output to the charging interface. The charging interface can be connected to an inverter, and the DC power is inverted into AC power through the inverter for use by AC tools. Of course, the second charging module 150 can also be not connected to the charging interface module 140, and the external inverter can receive the DC power output by the first charging module 130 (DCDC) for inversion. However, compared to receiving the power from ACDC for inversion, when receiving the power from DCDC for inversion, the power first passes through ACDC and then passes through DCDC, and the output power will be reduced. Therefore, this embodiment preferably connects the charging interface through ACDC, and the external inverter directly receives the DC power output by ACDC for inversion.

[0087] The solution provided by the above-mentioned embodiment can be combined with any other embodiment, that is, the charging device 110 provided in this application has multiple energy replenishment methods. It can use an AC power supply to replenish the first energy storage module 120 and the power tool battery pack (that is, the second energy storage module), or use the first energy storage module 120 to replenish the power tool battery pack, or use a large-capacity battery pack to replenish the small-capacity battery pack. It can also use an external DC power supply, such as solar energy to replenish the first energy storage module 120 and the power tool battery pack, and can also provide AC power to connect to an external socket to power the user's AC equipment, thereby meeting user needs in different scenarios, and can also solve the user's power anxiety when using power tools outdoors.

[0088] Furthermore, in order to improve the charging efficiency of the charging device 110 and enable the charging device 110 to charge multiple battery packs, as shown in Figure 5, the first charging module 130 includes at least two charging units, and the second DC interface unit 142 includes at least two charging interfaces. The input end of each charging unit is connected to the first energy storage module 120 through the first DC interface unit 141, and the input end of each charging unit is also connected to the second charging module 150. The output end of each charging unit is connected to at least one charging interface, so that the two charging units can charge the battery pack simultaneously or sequentially.

[0089] For example, the first charging module 130 may include two charging units, each of which is connected to a charging interface, or each of which is connected to two charging interfaces, or one of the charging units is connected to one charging interface and the other is connected to two charging interfaces. Alternatively, the first charging module 130 may include three charging units, each of which is connected to one or more charging interfaces, etc. The number of charging units and charging interfaces can be set according to the charging requirements and the size of the energy storage charging device 100, and this application does not impose any restrictions.

[0090] In one embodiment, when a charging unit is connected to multiple charging interfaces, the multiple charging interfaces are connected in parallel. At the same time, the charging unit charges the second energy storage module connected to one of the charging interfaces, that is, the charging unit charges the connected second energy storage module in a time-sharing manner. Alternatively, when the voltages of the multiple second energy storage modules connected to the charging unit are the same, the charging unit can also charge the multiple second energy storage modules at the same time. Alternatively, when the voltages of the multiple second energy storage modules connected to the charging unit are the same, the charging unit can first charge the multiple second energy storage modules in turn, so that the voltages of the multiple second energy storage modules are all charged to the preset voltage, and then charge the multiple second energy storage modules at the same time until the multiple second energy storage modules are fully charged. In this embodiment, in order to simplify the charging control logic of the charging device 110 and at the same time ensure the charging efficiency of the second energy storage modules, when a charging unit is connected to multiple second energy storage modules, the charging unit charges the multiple second energy storage modules in turn, so that one of the second energy storage modules can be fully charged at the fastest speed, which is convenient for user use.

[0091] In this embodiment, each charging unit is a DC-DC conversion unit, configured to convert the DC power stored in the first energy storage module 120 into the DC power required by the second energy storage module. Of course, in other embodiments, the charging unit is not limited to a DC-DC conversion unit and may also be a DC-AC conversion unit (i.e., a DCAC conversion unit), or the charging unit may include both a DC-DC conversion unit and a DCAC conversion unit.

[0092] As a specific example, as shown in Figure 5, the first charging module 130 includes two charging units, namely a first charging unit 131 and a second charging unit 132. The second DC interface unit 142 includes three charging interfaces, namely a first charging interface 142ba, a second charging interface 142b, and a third charging interface 142c. The number of circuit switches 161 is the same as the number of charging interfaces, and circuit switches 161 accordingly include a first switch K1, a second switch K2, and a third switch K3. The output of the first charging unit 131 is connected to the first charging interface 142ba via circuit switch K1, and the output of the second charging unit 132 is connected to the second charging interface 142b and the third charging interface 142c via circuit switches K2 and K3, respectively. The charging switch 162 includes a switch K5, and the inputs of both the first and second charging units 131, 132 are connected to the first energy storage module 120 via switch K5. In this example, the first switch K1, the second switch K2, the third switch K3 and the charging switch K5 can be composed of two switch modules connected in parallel. Even if one of the switch terminals is short-circuited, the other switch module can still be disconnected normally, thus achieving double insurance.

[0093] The first charging unit 131 and the second charging unit 132 are two independent charging units that can work in time-sharing or simultaneously. When the first charging unit 131 and the second charging unit 132 work in time-sharing, one of the charging units completes charging the second energy storage module connected to it before the other charging unit starts charging the second energy storage module connected to it. When the first charging unit 131 and the second charging unit 132 work simultaneously, the two charging units can simultaneously charge one of the second energy storage modules connected to them, that is, the energy storage charging device 100 charges two second energy storage modules at the same time. In this embodiment, by setting up multiple DCDC charging units, when the charging currents requested by the multiple second energy storage modules are different, the energy storage charging device can charge the multiple second energy storage modules at the same time.

[0094] In this embodiment, the maximum output power of a single charging unit is not less than 1.8KW. For example, the maximum output power of a single charging unit is 1.8KW, 2KW, or 2.4KW. Preferably, the maximum output power of a single charging unit is 3.6KW. Due to the large output power of a single charging unit, it can support fast charging of the battery pack. And when multiple charging units are working at the same time, multiple battery packs can be quickly charged at the same time, avoiding the impact of waiting for energy on the work efficiency of the garden team when they are out working.

[0095] Furthermore, when the charging device 110 provided in this embodiment charges the second energy storage module, it has at least two charging modes, namely a first charging mode (also a normal charging mode) and a second charging mode (also a fast charging mode). For the same second energy storage module, in the first charging mode, the maximum output power of the output end of the first charging module 130 is less than the maximum output power of the output end of the first charging module 130 in the second charging mode. In other words, for the same second energy storage module, the charging time required in the second charging mode from an empty state (for example, SOC less than or equal to 5%) to a fully charged state (for example, SOC greater than or equal to 95%) is less than the charging time required in the first charging mode.

[0096] In one embodiment, the energy storage charging device 100 further includes a human-computer interaction module, which is connected to the control module. The human-computer interaction module is used to receive a fast charging instruction issued by the user, wherein the fast charging instruction is used to instruct the energy storage charging device to enter the second charging mode. When charging the second energy storage module, the control module can switch between the first charging mode and the second charging mode according to the user's instructions. In this application, the charging priority of the second charging mode is higher than the charging priority of the first charging mode. That is, when the human-computer interaction module does not receive a fast charging instruction, the control module controls the energy storage charging device to enter the first charging mode; when the human-computer interaction module receives a fast charging instruction, the control module controls the energy storage charging device to enter the second charging mode.

[0097] In the first charging mode, the output power of a single charging unit can meet the charging needs of the battery pack, so the control module controls the single charging unit to charge the corresponding single battery pack. For example, the energy storage charging device charges the battery pack 200 connected to the first charging interface 142ba via the first charging unit 131, and / or alternately charges the battery pack 200 connected to the second charging interface 142b and the third charging interface 142c via the second charging unit 132. In the first charging mode, the maximum output power of the charging unit output to a single charging interface is not less than 1.8KW. For example, the maximum output power of a single second DC interface unit 142 is between 1.8KW and 3.6KW. For example, the maximum output power can be 1.8KW, 2KW, 2.4KW, 3KW, or 3.6KW.

[0098] In the second charging mode, the control module obtains the requested charging power of the second energy storage module and compares the requested charging power of the second energy storage module with the maximum output power of a single charging unit. When the requested charging power is less than or equal to the maximum output power of a single charging unit, the output power of a single charging unit can meet the fast charging requirements of the battery pack, and the control module controls the single charging unit to charge the second energy storage module. When the requested charging power is greater than the maximum output power of a single charging unit, the sum of the output powers of multiple charging units is required to meet the fast charging requirements. At this time, the control module controls at least two charging units in parallel to charge the single second energy storage module.

[0099] Furthermore, the switch module 160 also includes a switching switch 163, which is arranged between two adjacent charging units. The other end of the switching switch 163 is connected to the connection point of the other charging unit and the corresponding charging interface connected thereto. That is, as shown in Figure 5, one end of the switching switch K4 is connected to the output end of the first charging unit 131, and the other end of the switching switch K4 is connected to the output end of the second charging unit 132, which is used to control the connection relationship between the first charging unit 131 and the second charging unit 132. When the switching switch K4 is closed, the output ends of the first charging unit 131 and the second charging unit 132 are interconnected, so that the two adjacent charging units are connected in parallel. When the switching switch K4 is open, the output ends of the two adjacent charging units are disconnected. Therefore, the control module can determine whether to control the switching switch 163 to be closed based on the requested charging power of the battery pack in the second charging mode. When the requested charging power of the battery pack is less than or equal to the maximum output power output by a single charging unit, the control module controls the switching switch 163 to be closed so that at least two charging units are closed; when the requested charging power of the battery pack is greater than the maximum output power output by a single charging unit, the control module controls the switching switch 163 to be opened so that the output ends of at least two charging units are disconnected, and each charging unit charges the corresponding connected battery pack respectively.

[0100] For example, this embodiment provides two battery packs: a first-capacity battery pack 211 and a second-capacity battery pack 212. The rated capacity of the first-capacity battery pack 211 is smaller than that of the second-capacity battery pack 212. Due to the different rated capacities of the battery packs, the required charging power for the battery packs at the same charge rate is also different. The requested charging power of the smaller-capacity battery pack in the second charging mode is smaller than the requested charging power of the larger-capacity battery pack in the second charging mode. For example, in the second charging mode, the requested charging power of the first-capacity battery pack 211 is 6 kW, and the requested charging power of the second-capacity battery pack 212 is 2.4 kW. In this embodiment, the output power of a single charging unit is 3.6 kW. Therefore, in the second charging mode, when the control module receives a requested charging power of 6 kW, it controls the switch 163 to close, so that the first and second charging units 131, 132 are connected in parallel to charge the first-capacity battery pack 211 connected to the first charging interface 142ba. Therefore, the output power of the first charging interface 142ba is the sum of the output powers of the first charging unit 131 and the second charging unit 132. Since the output power of the charging interface is large, the charging speed of the battery pack 200 is correspondingly fast, and the charging time is shortened, thereby achieving fast charging. When the control module receives a request charging power of 2.4KW, it controls a single charging unit to charge the battery pack. In the above embodiment, only one switch is used as an example for explanation. In the actual solution, when there are multiple charging units, there can be more than one switch. For example, when there are n charging units (n is an integer greater than 2), there can be at most n-1 switches.

[0101] It is understandable that, in the second charging mode, the number of parallel charging units can be selected according to the requested charging power of the battery pack and is not limited to two.

[0102] In one embodiment, in the second charging mode, the maximum power output by the first charging module 130 is no less than 3.6 kW. For example, the maximum output power output by the first charging module 130 may be 3.6 kW, 4 kW, 4.8 kW, 6 kW, or 7.2 kW, among others. The output power of the first charging module 130 is the sum of the output powers of the multiple charging units within the first charging module that participate in charging the battery pack. As a specific example, in the first charging mode, the output power output by the first charging module 130 to a single second DC interface unit 142 is 3.6 kW. In the second charging mode, the output power output by the first charging module 130 to a single second DC interface unit 142 is 7.2 kW. In the first charging mode, the energy storage charging device can fully charge a 0.2 kWH battery pack in 8-15 minutes and charge an empty battery pack to 80% of its rated capacity in 5-12 minutes. The energy storage charger can fully charge a 0.6KWH battery pack in 13-25 minutes and charge an empty pack to 80% of its rated capacity in 9-22 minutes. In fast-charging mode, the charger can fully charge a 0.2KWH pack in 4-7 minutes, and a 0.6KWH pack in 8-15 minutes. Therefore, when the landscape team urgently needs battery packs, they can activate fast-charging mode to reduce waiting times.

[0103] The above embodiment provides two charging modes, so that when the user urgently needs to use the battery pack, the fast charging mode can be turned on, and when the user does not urgently need electricity, the normal charging mode can be turned on, thereby meeting the user's usage needs in different scenarios.

[0104] Furthermore, in the second charging mode, a specific charging port on the energy storage charging device can be pre-set as the charging port for the second charging mode. When a specific charging port is designated as a fast charging port, if the control module detects that the designated charging port is not installed with a battery pack 210, and a battery pack 210 is installed in another charging port, the fast charging mode will not be activated even if the control module receives a fast charging command. Of course, instead of pre-setting a specific port as a fast charging port, the user can designate a fast charging port. For example, when issuing a fast charging command, the user designates one of the charging ports as a fast charging port through the human-computer interaction module. Upon receiving the fast charging command and the corresponding charging port, the charging device 110 will fast charge the battery pack 210 connected to that charging port. Alternatively, if the charging device 110 has three charging ports and only one of them has a battery pack 210 installed, upon issuing a fast charging command, the charging device 110 will identify the charging port connected to the battery pack 210 and designate that port as the fast charging port, quickly charging the battery pack 210 connected to that charging port.

[0105] As previously mentioned, the charging device 100 in this embodiment has three charging interfaces. As a specific example, the first charging interface 142ba is provided as the charging interface in the second charging mode. This interface can be marked on the corresponding interface on the object for user identification. Furthermore, the first charging interface 142ba can also be used as the interface in the first charging mode. That is, the charging interface in the second charging mode is the first charging interface 142ba, and the charging interfaces in the first charging mode are the first charging interface 142ba, the second charging interface 142b, and the third charging interface 142c. When the user issues a fast charging command and does not specify a fast charging interface, the charging device 110 fast charges the battery pack connected to the first charging interface 142ba.

[0106] As previously described, charging device 110 includes a human-computer interaction module for receiving a fast charge instruction, thereby causing the control module to enter the second charging mode in response to the fast charge instruction. Furthermore, upon receiving the fast charge instruction, the control module does not immediately control the charging device to enter the second charging mode. Instead, the control module obtains information about the input power source and, based on this information, determines whether the charging device is permitted to enter the second charging mode.

[0107] Specifically, since the charging power output by a single charging interface in the second charging mode is relatively large, fast charging can only be performed when the power of the input power source is greater than the charging power required by the battery pack in the second charging mode. In this embodiment, when the input power source is an AC power source, the control module prohibits the energy storage charging mode from entering the second charging mode. When the input power source includes a first energy storage module 120, for example, the input power source is the first energy storage module 120, or the input power source is the first energy storage module 120 and an AC power source, the control module obtains the status information of the first energy storage module 120, and determines whether the energy storage charging device is allowed to enter the second charging mode based on the status information of the first energy storage module 120. The status information of the first energy storage module 120 includes the remaining power and temperature of the first energy storage module 120. When the remaining power of the first energy storage module 120 is less than the preset power, the control module prohibits the energy storage charging mode from entering the second charging mode. When the remaining power of the first energy storage module 120 is greater than or equal to a preset power level, the control module further determines whether the temperature of the first energy storage module 120 meets a preset temperature condition. If the temperature of the first energy storage module meets the preset temperature condition, the energy storage charging device is allowed to enter the second charging mode; otherwise, the energy storage charging device is prohibited from entering the second charging mode. The preset power level can be 10%, 15%, or 20% of the rated power of the first energy storage module 120, and can be selected based on the rated power of the first energy storage module.

[0108] In another embodiment, when the input power source includes a first energy storage module 120, the control module not only obtains status information of the first energy storage module 120, but also obtains status information of the battery pack. When the status information of the first energy storage module 120 and the status information of the battery pack both meet preset conditions, the energy storage charging device is allowed to enter the second charging mode. Specifically, the status information of the first energy storage module 120 includes the remaining power of the first energy storage module 120 and the battery temperature of the first energy storage module 120, and the status information of the battery pack includes the temperature of the battery pack. When the remaining power of the first energy storage module 120 is greater than or equal to the preset power, the battery temperature of the first energy storage module 120 meets the first preset temperature condition, and the temperature of the battery pack meets the second preset temperature condition, entry into the second charging mode is allowed; otherwise, entry into the second charging mode is prohibited.

[0109] In one embodiment, in the first charging mode, the multiple charging units of the first charging module 130 can operate simultaneously or in a time-sharing manner. Furthermore, when the control module determines that the charging interfaces corresponding to at least two charging units are both connected to the second energy storage module, the control module is further configured to obtain input power information and, based on the input power information, control the at least two charging units to charge the second energy storage module simultaneously or sequentially.

[0110] When the input power source is an AC power source, the control module controls at least two charging units to charge the second energy storage modules simultaneously, so that multiple second energy storage modules are fully charged as much as possible at the same time. When the input power source includes the first energy storage module 120, and the remaining power of the first energy storage module 120 is less than the preset power, the control module controls at least two charging units to charge the second energy storage modules in sequence. When the input power source is the first energy storage module 120, and the remaining power of the first energy storage module 120 is greater than or equal to the preset power, the control module controls at least two charging units to charge the second energy storage modules simultaneously.

[0111] Furthermore, in the first charging mode, when multiple charging units work simultaneously, the maximum output power output by each charging unit to a single charging interface is less than or equal to the maximum output power output by each charging unit to a single charging interface when multiple charging units work sequentially.

[0112] Specifically, when multiple charging units operate simultaneously, the maximum output power of each charging unit to a single charging port is no less than 1.8 kW; when multiple charging units operate sequentially, the maximum output power of each charging unit to a single charging port is no less than 3 kW. For example, when multiple charging units operate simultaneously, the maximum output power of each charging unit to a single charging port may be 1.8 kW or 2.4 kW, and when multiple charging units operate sequentially, the maximum output power of each charging unit to a single charging port may be 3 kW; alternatively, when multiple charging units operate simultaneously, the maximum output power of each charging unit to a single charging port may be 3 kW, and when multiple charging units operate sequentially, the maximum output power of each charging unit to a single charging port may be 3.6 kW; alternatively, when multiple charging units operate simultaneously, the maximum output power of each charging unit to a single charging port may be 3.6 kW, and when multiple charging units operate sequentially, the maximum output power of each charging unit to a single charging port may be 3.6 kW.

[0113] In the first charging mode, when the control module determines that multiple charging interfaces connected to a single charging unit are connected to at least two second energy storage modules, the control module is further configured to obtain information about the multiple second energy storage modules and information about the input power source, and charge the multiple second energy storage modules and the first energy storage module according to a preset priority based on the information about the second energy storage modules and the information about the input power source.

[0114] Specifically, in this embodiment, as shown in Figure 7, the second energy storage module includes a battery pack 210 and a self-propelled tool 220. The battery pack 210 is used to be detachably mounted on the electric tool to power the electric tool. The self-propelled tool 220 has a built-in battery for the self-propelled tool to move and work. When the charging device charges the battery pack 210, the battery pack 210 can be directly inserted into the charging interface. When charging the self-propelled tool 220, the self-propelled tool 220 can be charged through the adapter 230. One end of the adapter 230 is connected to the first DC interface unit of the charging device, and the other end is connected to the charging interface of the self-propelled tool 220. It can be understood that the charging device can not only charge the self-propelled tool through the adapter, but also charge other energy storage tools through the adapter. This application only takes the energy storage type self-propelled tool as an example.

[0115] The control module determines whether the second energy storage module connected to the charging interface module includes a battery pack 210 and a self-propelled tool 220. If the second energy storage module includes a battery pack 210 and a self-propelled tool 220, the control module determines whether the input power source includes an AC power source. If the input power source includes an AC power source, the charging priority of the battery pack 210 is higher than the charging priority of the first energy storage module 120, and the charging priority of the first energy storage module 120 is higher than the charging priority of the self-propelled tool 220. That is, the control module controls the charging device 110 to charge the battery pack 210 first. After the battery pack 210 is fully charged, the first energy storage module 120 is charged. After the first energy storage module 120 is fully charged, the self-propelled tool is charged. If the control module determines that the input power source does not include an AC power source, the charging priority of the battery pack 210 is higher than the charging priority of the self-propelled tool 220. Typically, the scenario with AC power is when the gardening team returns indoors at night to recharge their batteries. In this case, the control module controls the AC power to prioritize charging the battery pack so that the gardening team can work with a fully charged battery pack during the day. Secondly, it charges the first energy storage module 120 so that the gardening team can use the fully charged first energy storage module 120 to recharge the battery pack during the day, and finally charges the self-propelled tool. The scenario without AC power access is typically when working outdoors during the day. In this case, the charging device 110 charges the battery pack and the self-propelled tool through the first energy storage module 120. Since the rated capacity of the battery pack is smaller than that of the self-propelled tool, the battery pack charges faster. To avoid waiting for the user, the battery pack is charged first.

[0116] In another embodiment, when there is no AC power supply, in order to allow the self-propelled tool 220 to be fully charged and work first, the user can also send a priority charging instruction through the human-computer interaction module to instruct the charging device 110 to charge the self-propelled tool first.

[0117] Specifically, the amount of electricity stored in the self-propelled tool is not less than 5KWh. For example, the amount of electricity stored in the self-propelled tool can be 5KWh, 7KWh or 10KWh. Preferably, the amount of electricity stored in the self-propelled tool is 7.7KWh. Since the capacity of the self-propelled tool is large, it is difficult to quickly charge the self-propelled tool in a short period of time. When the user issues a priority charging instruction, the user can instruct the charging device to charge the self-propelled tool to a specified amount of electricity. When the human-computer interaction module receives the priority charging instruction, the control module gives priority to charging the self-propelled tool 220. After charging to the specified amount, it charges the battery pack 210. After the battery pack is full, if the control module detects that the self-propelled tool is still connected to the charging device 110, it controls the charging device 110 to continue charging the self-propelled tool 220 to fully charge the self-propelled tool 220. When the human-computer interaction module does not receive a priority charging instruction, the control module first charges the battery pack 210 so that the user can work with the fully charged battery pack 210. After the battery pack 210 is fully charged, the control module controls the energy storage charging device to charge the energy storage self-propelled tool 220.

[0118] In one embodiment, when the charging device charges multiple battery packs, the control module obtains digital communication modes of the multiple battery packs and controls the charging sequence of the multiple battery packs according to the digital communication modes.

[0119] In this embodiment, the charging interface of the charging device includes at least two digital communication terminals for communicating with battery packs with different digital communication types. Accordingly, the charging device includes at least two digital communication modules for connecting to the two types of digital communication terminals. Specifically, the charging device's digital communication terminals include at least a CAN (Controller Area Network) communication terminal and a serial communication terminal for communicating with battery packs with CAN communication and battery packs with serial communication, respectively.

[0120] In this embodiment, when the charging device 110 communicates with the battery pack, digital communication with the battery pack is prioritized via the CAN communication terminal. If CAN communication fails, digital communication with the battery pack is performed via the serial communication terminal. The control module identifies the communication type of the battery pack through the communication terminal and controls the charging priority of multiple battery packs based on the communication type. In other words, battery packs with different digital communication types have different charging priorities. Specifically, when the control module identifies a differential communication terminal, it prioritizes controlling the charging device 110 to charge the second energy storage module with the differential communication terminal. Once the second energy storage module with the differential communication terminal is fully charged, the second energy storage module with the serial communication terminal is charged.

[0121] Furthermore, when the digital communication types of multiple battery packs are the same, the control module identifies the insertion order of the multiple battery packs through communication and controls the charging order of the multiple battery packs by a single charging unit based on the insertion order of the battery packs. The charging priority of the battery pack 210 inserted earlier is higher than the charging priority of the battery pack 210 inserted later. When the insertion order of the multiple battery packs 210 is the same (for example, the multiple battery packs 210 are first inserted into the energy storage charging device and then the energy storage charging device is powered on), the control module controls the charging order based on the remaining power of the multiple battery packs 210. The charging priority of the battery pack 210 with a higher remaining power is higher than the charging priority of the battery pack 210 with a lower remaining power. Of course, the control module may first control the charging order of the multiple battery packs 210 based on the remaining power of the multiple battery packs 210 and, when the remaining power of the multiple battery packs 210 is the same, control the charging order of the multiple battery packs 210 based on the insertion order of the multiple battery packs 210.

[0122] It is understandable that the control module can identify the type of the second energy storage module, obtain the insertion order of the battery packs and the remaining power of the second energy storage module by communicating with the battery pack.

[0123] In one embodiment, the battery pack 200 can obtain power by being directly plugged into the charging port of a charging device, or it can be connected to the charging port of the charging device via a cable. When the battery pack 200 is plugged into the charging port of the charging device, the actual output power outputted by the charging port is greater than the actual output power when the battery pack 200 is connected to the charging device via a cable.

[0124] As shown in Figure 8, when the battery pack 210 is connected to the charging device via a cable, the battery pack 210 is mounted on a backpack 310 and connected to the charging device via the backpack 310. The backpack 310 has a battery pack mounting position, and the battery pack 200 is detachably mounted on the battery pack mounting position of the backpack 310. The backpack 310 also has a cable 311 and a first interface 312, wherein the shape and size of the first interface 312 are the same as the shape and size of the charging and discharging interface of the battery pack 200. Therefore, the first interface 312 can be plugged into any charging and discharging interface of the charging device, allowing the charging device to charge the battery pack via the cable.

[0125] When the charging device charges the battery pack via a cable, its charging power is lower than when the battery pack 200 is directly connected to the charging device 100. This is because, typically, when the battery pack is mounted on a backpack 310 to power a power tool, the user carries the backpack 310 on their back, connected to the power tool via the cable 311 and the first interface 312. If the charging device 100 increases the charging power when charging the battery pack 200 via the backpack 310, the cable's current capacity would need to be increased accordingly, which would inevitably make the cable thicker and inconvenient for the user when carrying the tool.

[0126] Furthermore, the present application sets the charging and discharging terminals of the battery pack interface and the charging and discharging terminals of the cable interface to have different structures, so that the charging device 100 can identify whether the charging type of the battery pack is cable charging or direct plug charging.

[0127] Specifically, the charging interface of the charging device 110 is provided with charging electrodes, and the charging interface of the battery pack 220 is provided with interface slots. Each interface slot is provided with a charging contact. When the battery pack 210 is plugged into the charging device 110, the charging electrodes on the charging device 110 can be inserted into the interface slots on the side of the battery pack 210 and connect one-to-one with the charging contacts. The first interface 312 of the backpack 310 also has interface slots, and the number of interface slots of the first interface 312 is the same as the number of interface slots of the battery pack's charging interface. When the first interface 312 is plugged into the charging device 110, the charging electrodes on the charging device 110 can be inserted into the interface slots of the first interface 312.

[0128] In detail, as shown in Figure 9, the charging electrode of the charging device 110 includes a positive electrode 101, a negative electrode 102, an analog signal communication electrode 103, a first digital signal communication electrode 104, and a second digital signal communication electrode 105. That is, the charging device 100 has two digital communication modes and can communicate with two different types of second energy storage modules. In this embodiment, the communication type of the first digital signal communication electrode 104 is serial communication, and the communication type of the second digital signal communication electrode 105 is differential communication. In detail, differential communication can be CAN (Controller Area Network, local area communication network) communication. The second digital signal communication electrode 105 has two plugs, namely 105a and 105b. The plugs 105a and 105b are independent and insulated from each other, and the projections of the plugs 105a and 105b overlap on the surface perpendicular to the direction of the battery pack plug. When the charging device 100 communicates with the second energy storage module, digital communication with the second energy storage module is performed preferentially through the second digital communication electrode 105. When the second digital signal communication fails, the first digital signal communication electrode 104 is used to perform digital communication with the second energy storage module.

[0129] Accordingly, as shown in FIG10 , the charging interface of the battery pack 210 provided in this embodiment includes a positive contact 301, a negative contact 302, an analog signal communication contact 303, a first digital signal communication contact 304, and a second digital signal communication contact 305. In this embodiment, the communication type of the first digital signal communication contact 304 is serial communication, and the communication type of the second digital signal communication contact 305 is differential communication. Specifically, the differential communication may be CAN communication. The second digital signal communication contact 305 includes two independent contacts, namely, contact 305a and contact 305b. Contacts 305a and 305b are disposed in the same terminal slot, with an insulating member disposed between contacts 305a and 305b. In a direction perpendicular to the direction of insertion and removal of the battery pack, contacts 305a and 305b are arranged front and back, and the projections of contacts 305a and 305b overlap. When the battery pack 210 is directly inserted into the charging interface of the charging device 110, the positive pole piece 101, the negative pole piece 102, the analog signal communication pole piece 103, the first digital signal communication pole piece 104 and the second digital signal communication pole piece 105 are respectively connected to the positive contact 301, the negative contact 302, the analog signal communication contact 303, the first digital signal communication contact 304 and the second digital signal communication contact 305. The charging device 100 first activates the battery pack through the analog signal communication pole piece 303, and then communicates digital signals with the battery pack 200 through the second digital signal communication pole piece 105. When the communication is successful, the charging device 100 recognizes that the battery pack is a direct plug-in connection.

[0130] As shown in FIG8 , the backpack 310 provided in this embodiment has a second interface 313 on its main body. The second interface 313 is used to connect to the battery pack 210. The backpack 312 is also connected to the first interface 312 via a cable 311. The first interface 312 is used to connect to the charging interface of the charging device 100. As shown in FIG11 , the second interface 313 has four types of electrodes: a positive electrode 101, a negative electrode 102, an analog signal communication electrode 103, and a first digital signal communication electrode 104. When the battery pack 210 is installed on the charging device, the positive electrode 101, the negative electrode 102, the analog signal communication electrode 103, and the first digital signal communication electrode 104 of the second interface 313 respectively connect to the positive contact 301, the negative contact 302, the analog signal communication contact 303, and the first digital signal communication contact 304 on the battery pack. The second digital signal communication contact 305 on the battery pack is not connected. As shown in Figure 12, the first interface 312 of the backpack device has four charging contacts, including a positive contact 301, a negative contact 302, an analog signal communication contact 303, and a first digital signal communication contact 304. That is, only four of the five interface slots of the first interface 312 are equipped with charging contacts, one interface slot is vacant, and only contains one type of digital signal communication terminal. When the first interface 312 of the backpack device 310 is plugged into the charging interface of the charging device 100, the positive electrode piece 101, the negative electrode piece 102, the analog signal communication electrode piece 103, and the first digital signal communication electrode piece 104 are respectively connected to the positive contact 301, the negative contact 302, the analog signal communication contact 303, and the first digital signal communication contact 304 in a one-to-one correspondence, and the second digital signal communication electrode piece 105 is inserted into the vacant interface slot. When the charging device 100 first communicates with the battery pack on the backpack device through the second digital signal communication electrode 105, since the second digital signal communication electrode 105 is inserted into the control interface slot and there is no electrical connection, there is no communication signal. At this time, the charging device 100 then communicates with the battery pack on the backpack device through the first digital signal communication electrode 104. At this time, the communication is successful, and the charging device can recognize that the current charging interface is connected to the cable output interface of the backpack device.

[0131] That is to say, by setting the number and type of digital signal communication terminals of the battery pack interface and the digital signal terminals of the interface of the backpack device 310 to be different, when the battery pack 210 and the first interface 310 of the backpack device 310 are plugged into the charging device 110, the digital communication type is different, so that the charging device 110 can identify whether the connection method of the battery pack is direct plug-in or cable type, thereby outputting different charging powers.

[0132] As shown in Figure 7, in one embodiment, when the charging device 100 charges the self-propelled tool 220, since the built-in battery in the self-propelled tool 220 stores a large amount of electricity and correspondingly, the volume and weight are also large, the user is usually unable to remove the built-in battery from the shell by himself. Based on this, the present application provides an adapter 230 for connecting the charging device 110 and the self-propelled tool 220, so that the charging device 110 can transmit electrical energy to the self-propelled tool 220 through the adapter 230. The adapter 230 has a first interface 231, a second interface 232 and a first cable 233 connecting the first interface 231 and the second interface 232. Among them, the first interface 231 is used to mate with the charging interface of the charging device 110, and the second interface 232 is used to mate with the charging interface of the self-propelled tool 220. In this embodiment, any one of the interfaces on the charging device 110 can be connected to the first interface 231 to transmit electrical energy. Of course, one of the interfaces can also be designated as a dedicated interface for the self-propelled tool 400. As a specific example, the third charging interface 142c on the charging device 110 can be designated as a dedicated interface for the self-propelled tool 220. That is, when the first interface 231 is plugged into the third charging interface 233, the charging device 110 can output DC power through the second charging unit 132 and transmit the power to the self-propelled tool 220 through the third charging interface 233 and the first interface 231.

[0133] Furthermore, the interface structure and terminals of the first interface 231 and the second interface 232 are identical, and the interface structure and terminals of the first interface 231 and the second interface 232 are identical to the interface structure and terminals of the battery pack. As shown in Figure 10, the first interface 231 and the second interface 232 each include a positive contact 301, a negative contact 302, a first analog signal communication contact 303, a first digital signal communication contact 304, and a second digital signal communication contact 305. The communication type of the first digital signal communication contact 304 is serial communication, and the communication type of the second digital signal communication contact 305 is differential communication. The charging device 110 can transmit digital signals to the self-propelled tool 220 via serial communication or differential communication. Preferably, digital signals are transmitted between the charging device 100 and the self-propelled tool via differential communication.

[0134] As another example, as shown in FIG13 , the first interface 231 and the second interface 232 each include a positive contact 301, a negative contact 302, a first analog signal communication contact 303, and a second digital signal communication contact 305. The second digital signal communication contact 305 is of differential communication type and includes two independent contacts, as shown in FIG13 , namely, contact 305a and contact 305b. Contacts 305a and 305b are insulated from each other. In a direction perpendicular to the plugging and unplugging direction of the first interface 231 or the second interface 232, contacts 305a and 305b are arranged vertically within the same interface slot. Within the area defined by the interface slot, the projections of contacts 305a and 305b at least partially overlap, and the widths of contacts 305a and 305b are equal to or greater than 0.1%. In other words, the autonomous tool 220 can only communicate digital signals with the charging device via differential communication.

[0135] In summary, when the charging device 110 communicates with the second energy storage module through different digital signal terminals, the output charging power is also different. In this embodiment, when the charging device 110 communicates with the second energy storage module through differential communication, the output charging power may be different from the charging power output when communicating with the second energy storage module through serial communication. In detail, when the charging device 100 communicates with the second energy storage module through differential communication, the charging device 110 obtains the charging power required by the second energy storage module by communicating with the second energy storage module, and controls the output power according to the communication result. When the charging device 110 communicates with the second energy storage module through serial communication, the output power is limited to less than or equal to 3.6KW. Preferably, in this embodiment, the output power of the charging device 110 when communicating with the second energy storage module via differential communication is different from the output power of the energy storage cabinet when communicating with the second energy storage module via serial port communication. As a specific example, when the charging device 110 communicates with the second energy storage module via differential communication, the output power is 3.6 kW, and when the charging device 110 communicates with the second energy storage module via serial port communication, the output power is 2.4 kW.

[0136] The above-mentioned charging device can use a DC power supply to charge the second energy storage module, and can also use an AC power supply to charge the second energy storage module. By carrying a DC power supply to charge the second energy storage module, the power anxiety problem of the garden team when working outside can be solved. In the scenario where there is an AC power supply, the AC power supply can also be used to charge the second energy storage module, which diversifies the power replenishment method, reduces the energy waiting time, and improves work efficiency.

[0137] As shown in Figure 1, an embodiment of the present application provides an energy storage charging device, including a first energy storage module 120 and a charging device 110. The first energy storage module 120 is used to store DC power, and the charging device 110 is used to convert the DC power stored in the first energy storage module 120 and charge the connected battery pack. As an example, the first energy storage module 120 and the charging device 110 can be arranged in the same shell, which can save storage space. As another example, the shell of the energy storage charging device 100 includes a first shell and a second shell. The first shell is used to store the first energy storage module 120, and the second shell is used to store the charging device 110. The first shell and the second shell are detachably connected, so that the first energy storage module 120 and the charging device are detachable, and the user can replace the first energy storage module 120.

[0138] When the first energy storage module 120 and the charging device 110 are detachably connected, the first energy storage module 120 and the charging device 110 can be connected via a cable, one end of the cable being detachably connected to the first energy storage module 120 and the other end being detachably connected to the DC interface of the charging device 110 .

[0139] Furthermore, the first energy storage module 120 and the charging device 110 can be stacked, so that when the energy storage charging device is installed on a garden tool transport vehicle, space inside the vehicle can be saved. The charging device 110 includes a first charging module 130 and a charging interface module 140.

[0140] In the charging device 110, the input end of the first charging module 130 is connected to the output end of the first energy storage module 120, and the output end of the first charging module 130 is connected to the charging interface module 140, which is used to connect to the battery pack. The first charging module 130 is used to transfer the electrical energy from the first energy storage module 120 to the charging interface module and charge the battery pack, wherein the battery pack is removably mounted on the power tool to power the power tool. The first charging rate when the first energy storage module 120 charges the battery pack is greater than the second charging rate when the mains is used to charge the battery pack, and the ratio of the first charging rate to the second charging rate is greater than 1 and less than or equal to 10.

[0141] In this embodiment, the charging rate of the battery pack is the ratio of the input power received by the battery pack to the rated power of the battery pack, that is, the greater the input power received by the battery pack, the greater the charging rate of the battery pack, and correspondingly, the faster the battery pack charges. The first charging rate of the first energy storage module 120 to the battery pack is the ratio of the maximum output power output by the first energy storage module 120 to the battery pack to the rated power of the battery pack, and the second charging rate of the AC power to the battery pack is the ratio of the maximum output power of the AC power to the rated power of the battery pack. When a traditional charger charges a battery pack, the input power source is usually AC power, and the battery pack is charged slowly due to the AC power limit. The energy storage charging device provided in this embodiment uses a DC energy storage module to charge the battery pack, which can increase the charging power of the battery pack and increase the charging speed.

[0142] Specifically, the charging power provided by the first energy storage module 120 can enable the battery pack to have a first charging rate greater than or equal to 3C. Preferably, the first charging power is 3C, 4C, 5C, 6C, 10C, or 12C. The charging power provided by the mains can only support a second charging rate of the battery pack between 1C and 2C. Therefore, when charging with the first energy storage module, the battery pack charges much faster than when the charger uses the mains to charge the battery pack.

[0143] Accordingly, for the same battery pack, the first charging time required by the first energy storage module 120 to charge the battery pack from an empty state to a fully charged state is shorter than the second charging time required by the AC power supply to charge the battery pack from an empty state to a fully charged state.

[0144] In one embodiment, the maximum output power of the first energy storage module 120 is greater than the maximum output power of the mains. The ratio of the maximum output power of the first energy storage module 120 to the maximum output power of the AC power supply is greater than 1 and less than or equal to 10. Exemplarily, the ratio of the maximum output power of the first energy storage module 120 to the maximum output power of the AC power supply can be 2, 3, 4, 5, 6, 8, or 10. The maximum output power of the first energy storage module 120 is greater than or equal to 1.8 kW; preferably, the maximum output power of the first energy storage module is greater than or equal to 3 kW. Exemplarily, the maximum output power of the first energy storage module 120 is 3.6 kW, 4 kW, 5 kW, 6 kW, 7 kW, 10 kW, or 12 kW. The output power of the mains is less than 1.8 kW.

[0145] In one embodiment, the first energy storage module 120 serves as a DC power source, storing 2 kWh or more of energy. Furthermore, the rated capacity of the first energy storage module 120 is 5 kWh or more and 20 kWh or less. When the first energy storage module 120 stores more than 20 kWh, the volume and weight of the first energy storage module 120 increase accordingly, making it difficult to carry. When the first energy storage module 120 stores less than 3 kWh, it cannot meet the energy needs of a gardening team for a full day of field work. By setting the capacity of the first energy storage module 120 to 2 kWh or more and 10 kWh or less, the energy storage charging device 100 stores enough energy to support the gardening team's field work for at least one day while also being portable and compact. Specifically, the capacity of the first energy storage module 120 can be 3 kWh, 4 kWh, 5 kWh, 6 kWh, 7 kWh, 8 kWh, 9 kWh, 10 kWh, 12 kWh, 15 kWh, 18 kWh, or 20 kWh. Preferably, the amount of electricity stored in the first energy storage module 120 may be 5KWh or 7.7KWh. The first energy storage module 120 may be a battery pack, which includes a plurality of battery cells, and the plurality of battery cells are connected in series and / or in parallel. In this embodiment, the battery pack may include 15 battery cells, and the 15 battery cells are connected in series. The second energy storage module may be a battery pack for an electric tool, and the battery pack may be directly plugged into the electric tool to power the electric tool. The amount of electricity in the battery pack is not greater than 1KWh, and typically, the amount of electricity in the battery pack is between 0.5KWh and 0.6KWh. Since the amount of electricity stored in the first energy storage module 120 is much greater than the amount of electricity stored in the battery pack, multiple battery packs can be replenished with electricity by carrying the first energy storage module 120.

[0146] In this embodiment, the voltage platform of the first energy storage module 120 is not less than 30V. Preferably, the voltage platform of the first energy storage module can be 48V, 56V or 60V. Since the amount of electricity stored in the first energy storage module 120 is much greater than the rated amount of electricity of the battery pack, and the voltage platform of the first energy storage module 120 is high, the first energy storage module 120 can support high-power discharge, thereby quickly charging the battery pack. Furthermore, the continuous discharge rate of the first energy storage module 120 is not less than 1C, that is, during the continuous discharge process of the first energy storage module 120 from discharging the remaining electricity to at least less than or equal to 90% to discharging the remaining electricity to at least less than or equal to 10%, the discharge rate is not less than 1C. Thus, the first energy storage module 120 can support a larger output power and quickly charge the battery pack.

[0147] Furthermore, the charging device 110 also includes a second charging module, the input end of the second charging module is connected to the mains, the second charging module 150 is used to convert the AC power provided by the mains into DC power, and the output end of the second charging module is connected to the first energy storage module 120 and the first charging module respectively, for charging the first energy storage module and charging the battery pack through the first charging module. The energy storage charging device provided in this embodiment can charge the battery pack through the DC power of the first energy storage module, can charge the battery pack through the AC power supply, and can also use the AC power supply to replenish the energy of the first energy storage module, thereby meeting the needs of users in different scenarios and solving the power anxiety problem of users when using power tools outdoors.

[0148] In one embodiment, the first charging module includes at least a first charging unit and a second charging unit, and the charging interface module includes at least a first charging interface and a second charging interface. The input ends of the first charging unit and the second input unit are both connected to the output end of the first energy storage module and the output end of the second charging module, the output end of the first charging unit is connected to the first charging interface, and the output end of the second charging unit is connected to the second charging interface.

[0149] In one embodiment, the charging device further includes a switch module, which includes at least a first switching switch, one end of the first switching switch is connected to the output end of the first charging unit, and the other end is connected to the output end of the second charging unit, for controlling the connection relationship of the charging units. When the first switching switch is closed, the output end of the first charging unit and the output end of the second charging unit are connected to each other, so that the electric energy of the first charging unit and the second charging unit are both output to the same charging interface. When the first switching switch is turned on, the output end of the first charging unit and the output end of the second charging unit are disconnected, so that the electric energy of the first charging unit is output to the first charging interface, and the electric energy of the second charging unit is output to the second charging interface. The energy storage charging device further includes a control module, which is connected to the control end of the first switching switch and is used to control the first switching switch to switch between an on state and an off state.

[0150] In one embodiment, the energy storage charging device includes at least a first charging mode and a second charging mode. When the control module controls the first switching switch to be disconnected, the energy storage charging device is in the first charging mode, and each charging unit provides power to a single charging interface connected thereto. When the control module controls the first switching switch to be turned on, the energy storage charging device is in the second charging mode, and at least two charging units are connected in parallel to provide power to one charging interface. The maximum output power output from the charging interface to the battery pack in the first charging mode is less than the maximum output power output from the charging interface to the battery pack in the second charging mode.

[0151] In one embodiment, in the second charging mode, the maximum output power outputted from the charging interface to the battery pack is not less than 3.6KW.

[0152] In one embodiment, the charging device 110 further includes a human-computer interaction module connected to the control module. The control module is configured to receive a fast charging instruction via the human-computer interaction module and control the first switch to conduct according to the fast charging instruction, thereby causing the energy storage charging device to enter the second charging mode.

[0153] Regarding the specific limitations of the charging device in the above embodiment, reference may be made to the limitations in the aforementioned embodiment, which will not be repeated here.

[0154] The energy storage charging device of this embodiment uses the DC power stored in the energy storage module to charge the battery pack, which can solve the problem of limited charging power and slow charging speed caused by traditional chargers obtaining AC power from the socket. The output power of the energy storage module is greater than the power of the AC power. Therefore, when the energy storage module is used to charge the battery pack, its charging speed is also greater than the charging speed of the battery pack using the AC power.

[0155] Another embodiment of the present application provides a charging control method for a charging device, which is based on the aforementioned charging device and is executed by the aforementioned control device. As shown in FIG14 , the charging control method includes the following steps:

[0156] Step S10: Acquire information about an input power source and the number of charging tasks, where the input power source includes a first energy storage module and / or an AC power source, and the number of charging tasks is related to the number of external devices;

[0157] Acquiring the number of charging tasks includes acquiring the number of charging tasks connected to each charging unit, where the number of charging tasks is the same as the number of second energy storage modules connected to the charging unit.

[0158] Step S20: determining a maximum output parameter of the energy storage charging device based on the input power information and the number of charging tasks; wherein the maximum output parameter may be a maximum output current or a maximum output power;

[0159] Step S30, receiving a requested charging parameter sent by an external device, and comparing the maximum output parameter with the requested charging parameter; wherein the requested charging parameter may be a requested charging current or a requested charging power;

[0160] Step S40: charging the external device according to the preset priority based on the comparison result.

[0161] In one embodiment, as shown in FIG15 , in step S10 , obtaining information about the input power supply includes:

[0162] Step S11, determining whether the input power source includes the first energy storage module and / or an external AC power source;

[0163] Step S12: When the input power source includes the first energy storage module, controlling the first charging module to operate so as to charge the second energy storage module through the first energy storage module;

[0164] Step S13: When the first input power source includes an AC power source, the second charging module is controlled to operate so as to charge the first energy storage module and / or the second energy storage module through the AC power source.

[0165] Furthermore, as shown in FIG16 , step S13 further includes:

[0166] Step S131, determining whether the first energy storage module is connected;

[0167] Step S132: When the first energy storage module is connected, determining whether the remaining power of the first energy storage module is greater than or equal to a preset power;

[0168] Step S133: When the remaining power of the first energy storage module is greater than or equal to a preset power, controlling the AC power supply and the first energy storage module to charge the second energy storage module simultaneously;

[0169] In step S134, when the remaining power of the first energy storage module is less than the preset power, the AC power supply is controlled to charge the second energy storage module first, and after the second energy storage module is charged, the first energy storage module is charged.

[0170] Wherein, step S133 further includes, after the AC power supply and the first energy storage module finish charging the second energy storage module, controlling the AC power supply to charge the first energy storage module.

[0171] In one embodiment, in step S20, the maximum output parameter of the energy storage charging device is determined based on the information of the input power supply and the number of charging tasks, including: determining whether a fast charging instruction is received; when the fast charging instruction is received, determining whether entering the second charging mode is allowed based on the information of the input power supply, when entering the second charging mode is allowed, controlling at least two charging units in parallel to charge a single second charging module, and calculating the maximum discharge parameter in the second charging mode based on the information of the input power supply; when entering the second charging mode is not allowed, entering the first charging mode, determining whether multiple charging units are allowed to work simultaneously in the first charging mode, and calculating the maximum output power of the charging interface when multiple charging units work simultaneously, or the maximum output power of the charging interface when multiple charging units work sequentially, based on the judgment result and the information of the input power supply.

[0172] The control method of the charging device described above can charge the power tool's battery pack via the first energy storage module 120, and can also charge the first energy storage module 120 and the battery pack via an AC power source. When the gardening team is out working during the day and AC power is unavailable, they can directly charge the power tool's battery pack by carrying a large-capacity first energy storage module 120, thus alleviating the gardening team's anxiety about power usage while out working. At night, when the gardening team is not working, the battery pack and the first energy storage module 120 can be charged using an AC power source, allowing the gardening team to carry multiple fully charged battery packs and the first energy storage module 120 when out working.

Claims

1. A charging device for charging a second energy storage module, characterized in that: The charging device includes a first charging module, a second charging module and a charging interface module; The charging interface module includes at least a first DC interface unit and a second DC interface unit, the first DC interface unit is used to connect to the first energy storage module, and the second DC interface unit is used to connect to the second energy storage module; A first end of the first charging module is connected to the first DC interface unit, and a second end of the first charging module is connected to the second DC interface unit. The first charging module is used to convert the electric energy stored in the first energy storage module and transmit it to the second energy storage module, so that the first energy storage module charges the second energy storage module. The charging interface module also includes an AC input interface, which is used to connect to an AC power source; A first end of the second charging module is connected to the AC input interface, and a second end of the second charging module is connected to the first DC interface unit. The second charging module is used to convert AC power into DC power and output it to the first DC interface unit to charge the first energy storage module. The second charging module is further configured to convert the AC power into DC power, and transmit the DC power to the second DC interface unit without passing through the first energy storage module, so as to charge the second energy storage module.

2. The charging device according to claim 1, characterized in that The output end of the second charging module is connected to the first charging module so that the DC power is transmitted to the second DC interface unit through the first charging module.

3. The charging device according to claim 2, characterized in that It also includes a control module and a switch module, wherein the switch module is connected to the control module and is used to receive a control signal from the control module to be turned on or off under the action of the control signal; The switch module includes a loop switch, which is arranged between the first charging module and the second DC interface unit and is used to control the on / off of the loop from the first charging module to the second DC interface unit; The switch module also includes a charging switch, one end of which is connected to the first DC interface unit, and the other end of which is respectively connected to the first charging module and the second charging module, for controlling the first energy storage module to be connected to or disconnected from the charging device.

4. The charging device according to claim 3, characterized in that The control module is used to determine the type of input power and control the charging method of the charging device to the second energy storage module according to the type of input power, wherein the input power includes the AC power supply and the first energy storage module; When the control module determines that both the AC power supply and the first energy storage module are connected, the control module further obtains the requested charging power of the second energy storage module and determines whether the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module; When the requested charging power of the second energy storage module is less than the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed simultaneously, and controls the AC power supply to charge the second energy storage module and the first energy storage module simultaneously; When the requested charging power of the second energy storage module is greater than the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed simultaneously, and controls the AC power supply and the first energy storage module to charge the second energy storage module simultaneously; When the requested charging power of the second energy storage module is equal to the maximum output power of the second charging module, the control module controls the charging switch and the loop switch to be closed in sequence, and controls the AC power supply to charge the second energy storage module and the first energy storage module in sequence.

5. The charging device according to claim 4, characterized in that The rated capacity of the second energy storage module is less than the rated capacity of the first energy storage module; When the control module controls the AC power supply to charge the second energy storage module and the first energy storage module in sequence, the control module first controls the loop switch to close to charge the second energy storage module. When the control module determines that the second energy storage module is full, the control module controls the charging switch to close to charge the first energy storage module.

6. The charging device according to claim 4, characterized in that When the control module determines that only the first energy storage module is connected, the control module controls the loop switch and the charging switch to be closed, so that the first energy storage module charges the second energy storage module; When the control module determines that only the AC power source is connected, the control module controls the loop switch to be closed and the charging switch to be opened, so that the AC power source charges the second energy storage module.

7. The charging device according to claim 1 or 2, characterized in that: The output end of the second charging module is connected to the second DC interface unit so as to directly transmit the DC power to the second DC interface unit.

8. The charging device according to claim 1, wherein: The first charging module is a bidirectional charging module, and the second energy storage module is further used to charge the first energy storage module through the first charging module.

9. The charging device according to claim 8, characterized in that The second charging module includes a first capacity battery pack and a second capacity battery pack, wherein the rated capacity of the first capacity battery pack is greater than the rated capacity of the second capacity battery pack; The first charging module is further configured to convert the electrical energy stored in the first capacity battery pack and charge the second capacity battery pack.

10. The charging device according to claim 3, characterized in that When the charging device charges the second energy storage module, the charging device includes at least a first charging mode and a second charging mode, and the output power of a single charging interface in the second charging mode is greater than the output power of a single charging interface in the first charging mode.

11. The charging device according to claim 10, characterized in that: The second DC interface unit includes at least one charging interface, each of the charging interfaces being used for detachably connecting to one of the second energy storage modules; The first charging module includes at least two charging units, the input end of each charging unit is connected to the first DC interface unit and the second charging module, and the output end of each charging unit is connected to at least one charging interface.

12. The charging device according to claim 11, characterized in that The switch module further includes a switch, which is provided between adjacent charging units and is used to control the connection relationship between adjacent charging units; When the switch is disconnected, the output terminals of at least two charging units are connected; When the switch is closed, the output terminals of at least two charging units are disconnected.

13. The charging device according to claim 12, characterized in that: In the first charging mode, a single charging unit is used to provide electrical energy to a single second energy storage module correspondingly connected thereto; In the second charging mode, the control module obtains the requested charging power of the second energy storage module, compares the requested charging power with the maximum output power of a single charging unit, and determines whether to control the switching switch to be closed based on the comparison result.

14. The charging device according to claim 13, characterized in that When the requested charging power is less than or equal to the maximum output power of the single charging unit, the control module controls the switch to be disconnected so that the single charging unit charges the second energy storage module; When the requested charging power is greater than the maximum output power of the single charging unit, the control module controls the switch to be closed, so that at least two charging units are connected in parallel to charge the single second energy storage module.

15. The charging device according to claim 10, characterized in that The control module is used to obtain information about the input power source and determine whether the charging device is allowed to enter the second charging mode according to the information about the input power source.

16. The charging device according to claim 15, characterized in that: The input power supply includes the AC power supply and / or the first energy storage module; When the input power source is the AC power source, the control module prohibits the charging device from entering the second charging mode; When the input power source includes the first energy storage module and the remaining power of the first energy storage module is less than a preset power, the control module prohibits the charging device from entering the second charging mode; When the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power, the charging device is allowed to enter the second charging mode.

17. The charging device according to claim 16, characterized in that When the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power, the control module obtains the temperatures of the second energy storage module and the first energy storage module, and allows the charging device to enter the second charging mode when the temperatures of the second energy storage module and the first energy storage module meet a preset temperature condition.

18. The charging device according to claim 10, characterized in that The system further includes a human-computer interaction module, the human-computer interaction module being connected to the control module and configured to obtain a fast charging instruction issued by a user, the fast charging instruction being configured to instruct the charging device to enter the second charging mode; When the human-computer interaction module does not receive the fast charging instruction, the control module controls the charging device to enter the first charging mode; When the human-computer interaction module receives the fast charging instruction, the control module controls the charging device to switch from the first charging mode to the second charging mode.

19. The charging device according to claim 11, wherein: In the first charging mode, when the control module determines that at least two of the charging units are connected to the second energy storage module, the control module is further used to obtain information of the input power supply and control the at least two charging units to charge the at least two second energy storage modules simultaneously or sequentially according to the information of the input power supply.

20. The charging device according to claim 19, characterized in that When the input power source is the AC power source, the control module controls at least two charging units to charge the second energy storage module simultaneously; When the input power source includes the first energy storage module and the remaining power of the first energy storage module is less than a preset power value, the control module controls at least two charging units to charge the second energy storage module in sequence; When the input power source is the first energy storage module and the remaining power of the first energy storage module is greater than or equal to the preset power, the control module controls at least two charging units to charge the second energy storage module simultaneously.

21. The charging device according to claim 10, characterized in that A single charging unit is connected to at least two charging interfaces; In the first charging mode, when the control module determines that the multiple charging interfaces connected to the single charging unit are all connected to the second energy storage module, the control module is further configured to obtain information about the multiple second energy storage modules and information about the input power supply, and control the single charging unit to charge the multiple second energy storage modules and the first energy storage module in sequence according to a preset priority based on the information about the multiple second energy storage modules and the information about the input power supply.

22. The charging device according to claim 21, characterized in that The second energy storage module includes a battery pack and a self-propelled tool, wherein the battery pack is detachably mounted on the power tool and supplies power to the power tool, and the self-propelled tool has a built-in battery; The control module determines whether the second energy storage module connected to the charging interface module includes the battery pack and the self-propelled tool. If the second energy storage module includes the battery pack and the self-propelled tool, the control module determines whether the input power source includes an AC power source. If the input power source includes the AC power source, the charging priority of the battery pack is higher than the charging priority of the first energy storage module, and the charging priority of the first energy storage module is higher than the charging priority of the self-propelled tool. When the control module determines that the input power source does not include the AC power source, the charging priority of the battery pack is higher than the charging priority of the self-propelled tool.

23. The charging device according to claim 22, characterized in that The charging interface includes at least two types of digital communication terminals, and the charging device is used to communicate with battery packs with different digital communication types through at least one of the digital communication terminals.

24. The charging device according to claim 23, characterized in that The control module determines whether each of the charging interfaces is connected to the battery pack. When each of the charging interfaces is connected to the battery pack, the control module further determines the digital communication type of the battery pack connected to each charging interface, and controls the charging priority of the charging device for the multiple battery packs according to the digital communication type.

25. The charging device according to claim 24, characterized in that The digital communication terminal of the charging device includes a serial communication terminal and a differential communication terminal, the charging device is used to communicate with a battery pack having the serial communication type through the serial communication terminal, and the charging device is used to communicate with a battery pack having the differential communication type through the differential communication terminal; The control module determines the digital communication type of the battery pack and controls the charging priority of the battery pack with the differential communication type to be higher than the battery pack with the serial communication type.

26. The charging device according to claim 24, characterized in that When the control module determines that the digital communication types of the multiple battery packs are the same, it also obtains the insertion order of the multiple battery packs and controls the charging order of the battery packs by the charging device according to the insertion order.

27. The charging device according to claim 25, characterized in that The control module also controls the output power of the charging unit according to the communication type of the battery pack connected to each charging interface; The control module determines that when the charging device communicates with the battery pack using a serial communication type, the charging power output by the charging interface is less than the charging power output by the charging interface when the charging device communicates with the battery pack using a differential communication type.

28. An energy storage charging device, comprising the charging device according to claims 1-27, wherein the energy storage charging device further comprises a first energy storage module, wherein the first energy storage module is connected to the charging device and is used to charge the second energy storage module through the charging device or obtain electrical energy through the charging device.

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