Energy supply system

Abstract

The utility model relates to a power supply system which comprises a battery pack system and an energy supply system. The battery pack system comprises a backpack battery pack and a handheld battery pack, the backpack battery pack is configured to be detachably mounted to the first type of electric tool to supply power to the first type of electric tool, and the handheld battery pack is configured to be detachably mounted to the second type of electric tool to supply power to the second type of electric tool; wherein the backpack battery pack is configured to be capable of being carried by a user; the energy supply system comprises a direct current charging device, and the direct current charging device is used for converting electric energy of the backpack battery pack and transmitting the electric energy to the handheld battery pack, so that the backpack battery pack charges the handheld battery pack.

Description

[0001] This application claims priority to Chinese patent application filed on April 28, 2023 with application number 202310483199.7 and Chinese patent application filed on October 19, 2023 with application number 202311360266.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to an energy supply system. Background Art

[0003] In some work scenarios, such as outdoor work scenarios, power tools are often required to work continuously for a long time. In order to achieve uninterrupted operation of power tools, the selection of power source is the primary consideration.

[0004] Generally speaking, power tools that use fuel as a power source (hereinafter referred to as fuel-powered tools, such as gasoline-powered tools) can meet the requirements of long-term uninterrupted work. However, the main problem with fuel-powered tools is that the exhaust gas they release will pollute the environment, and the noise of fuel-powered tools during operation is relatively loud, which will cause noise pollution to the surrounding environment.

[0005] Electric tools are environmentally friendly and clean, and they also produce relatively less noise than fuel-powered tools. Therefore, electric tools are increasingly favored by power tool users. However, the main problem with electric tools is that the battery pack can only provide a short battery life. This problem is particularly prominent outdoors or in scenes where there is no mains socket.

[0006] In order to meet the demand for power tools to work continuously for a long time without a mains socket, a common solution is for users to purchase an energy storage power supply and a power supply device. The energy storage power supply has sufficient power to meet the continuous work for a long time, and then use the power supply device to transmit the power of the energy storage power supply to the battery pack that powers the power tool, so that the battery pack can meet the power requirements for long-term work. Utility Model Content

[0007] Based on this, the present application provides a power supply system, including a battery pack system and an energy supply system; the battery pack system includes a backpack battery pack and a handheld battery pack, the backpack battery pack is configured to be detachably installed on a first type of power tool to power it, and the handheld battery pack is configured to be detachably installed on a second type of power tool to power it; wherein, the backpack battery pack is configured to be able to be carried by a user; the energy supply system includes a DC charging device, the DC charging device includes an input interface and an output interface, the input interface is configured to be detachably installed on the backpack battery pack, and the output interface is configured to be detachably installed on the handheld battery pack; the DC charging device also includes at least one DC charging module, the DC charging module is configured to receive the electrical energy of the input interface, convert it and transmit it to the output interface, so that the backpack battery pack charges the handheld battery pack.

[0008] In one embodiment, the power supply system also includes a backpack device, which is configured to be carried by a user. The backpack device includes a cable and a plug interface and a first backpack interface connected by the cable. The first backpack interface is configured to detachably install a backpack battery pack. The plug interface is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the plug interface and the backpack battery pack is installed to the first backpack interface, the backpack battery pack powers the second type of power tool.

[0009] In one embodiment, the first backpack interface includes a pair of first connecting portions extending along a first plugging direction, and the first connecting portions are used to guide the backpack battery pack to connect to the backpack device along the first plugging direction.

[0010] In one embodiment, the power supply system also includes a carrying device, which is configured to be carried by a user. The carrying device includes a cable and a plug interface and a second carrying interface connected by the cable. The second carrying interface is configured to detachably install a handheld battery pack. The plug interface is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the plug interface and the handheld battery pack is installed to the second carrying interface, the handheld battery pack powers the second type of power tool.

[0011] In one embodiment, the second backpack interface includes a pair of second connecting portions extending along the second plugging direction, and the second connecting portions are used to guide the handheld battery pack to connect to the backpack device along the second plugging direction.

[0012] In one embodiment, the first type of power tool further comprises a backpack configured for a user to carry the first type of power tool, and the backpack battery pack is configured to be detachably mounted to the backpack so that the backpack battery pack can power the first type of power tool.

[0013] In one embodiment, the handheld battery pack is configured to be detachably mounted to a first type of power tool, so that the handheld battery pack can power the first type of power tool.

[0014] In one embodiment, the rated power of the first type of power tool is greater than the rated power of the second type of power tool.

[0015] In one embodiment, the weight of the backpack battery pack is in the range of 4-12 Kg.

[0016] In one embodiment, the rated capacity of the backpack battery pack ranges from 550-3000Wh.

[0017] In one embodiment, the rated power to weight ratio of the backpack battery pack ranges from 60-300Wh / Kg.

[0018] In one embodiment, the ratio of rated capacity to volume of the backpack battery pack ranges from 40 to 220 Wh / L.

[0019] In one embodiment, the discharge rate of the backpack battery pack is greater than or equal to 2C.

[0020] In one embodiment, the maximum output power of the backpack battery pack is greater than or equal to 3KW.

[0021] In one embodiment, an average charging power of the DC charging device for the handheld battery pack is greater than an average discharging power of the second type electric tool for the handheld battery pack.

[0022] In one embodiment, when the handheld battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 14°C; and / or when the handheld battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 19°C; when the handheld battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the handheld battery pack does not exceed 24°C.

[0023] In one embodiment, the internal resistance of a single cell in the handheld battery pack is less than or equal to 3 mΩ.

[0024] In one embodiment, the weight of the handheld battery pack ranges from 1 kg to 3.5 kg.

[0025] In one embodiment, the rated power to weight ratio of the backpack battery pack is in the range of 60-300Wh / Kg, and the maximum allowable charging rate of the handheld battery pack is not less than 7C.

[0026] In one embodiment, the discharge rate of the backpack battery pack is greater than or equal to 2C.

[0027] In one embodiment, the time required for the handheld battery pack to be charged from an empty state to a fully charged state is less than or equal to the time required for the handheld battery pack to be discharged from a fully charged state to an empty state.

[0028] In one embodiment, the internal resistance of a single cell in the handheld battery pack is less than or equal to 3 mΩ.

[0029] In one embodiment, when the handheld battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 14°C; and / or when the handheld battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 19°C; when the handheld battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the handheld battery pack does not exceed 24°C.

[0030] In one embodiment, the ratio of rated power to weight of the backpack battery pack is greater than the ratio of rated power to weight of the handheld battery pack.

[0031] In one embodiment, the maximum allowable charging rate of the handheld battery pack is greater than the maximum allowable charging rate of the backpack battery pack.

[0032] In one embodiment, under the same charging rate, the temperature rise of the handheld battery pack is less than the temperature rise of the backpack battery pack.

[0033] In one embodiment, the internal resistance of a single cell in the handheld battery pack is smaller than the internal resistance of a single cell in the backpack battery pack.

[0034] In one embodiment, the rated capacity of the backpack battery pack is defined as a first capacity, the rated capacity of the handheld battery pack is defined as a second capacity, and the first capacity is greater than the second capacity.

[0035] In one embodiment, a ratio of the first capacity to the second capacity is greater than or equal to 2.

[0036] In one embodiment, the DC charging device is only provided with an input interface for receiving power input.

[0037] In one embodiment, the input interface is configured to only receive power input from a backpack battery pack but not output power to the outside; the output interface is configured to only output power to a handheld battery pack but not receive external power input.

[0038] In one embodiment, the input interface includes a pair of first connection parts extending along a first sliding direction, and the first connection parts are used to guide the backpack battery pack to connect with the DC charging device along the first sliding direction; and / or the output interface includes a pair of second connection parts extending along a second sliding direction, and the second connection parts are used to guide the handheld battery pack to connect with the DC charging device along the second sliding direction.

[0039] In one embodiment, a maximum dimension of the first connection portion in the first sliding direction is greater than a maximum dimension of the second connection portion in the second sliding direction.

[0040] In one embodiment, the DC charging device includes a shell extending longitudinally along a height direction, and the input interface and the output interface are arranged opposite to each other along a width direction perpendicular to the height direction.

[0041] In one embodiment, the DC charging device further includes a heating module and / or a cooling module configured to heat and / or cool the backpack battery pack and the handheld battery pack.

[0042] In one embodiment, the energy supply system also includes at least one AC charging device, which includes an input power interface, at least one charging interface and at least one AC charging module. The input power interface is configured to connect to an AC power source, the charging interface is configured to detachably install a backpack battery pack and / or a handheld battery pack, and the AC charging module is configured to receive AC power from the input power interface, convert it into DC power and output it to the charging interface to charge the backpack battery pack and / or the handheld battery pack.

[0043] In one embodiment, the charging interface has the same structure as the input interface; and / or, the charging interface has the same structure as the output interface; and / or, the charging interface includes the structure of the input interface and the output interface.

[0044] In one embodiment, the energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is configured to be detachably connected to a backpack battery pack and / or a handheld battery pack, and the charging module is configured to receive electrical energy from the charging interface and transmit it to the charging cabinet interface to charge the backpack battery pack and / or the handheld battery pack.

[0045] In one embodiment, the energy supply system further includes a connecting device, the charging cabinet includes an input interface, and the connecting device is configured to connect the charging interface and the input interface to achieve transmission of the electric energy output by the charging interface to the charging cabinet.

[0046] In one embodiment, the connection device includes a cable and an adapter connected to the cable, the cable is configured to be connected to the input interface, and the adapter is configured to be detachably connected to the charging interface.

[0047] In one embodiment, the charging cabinet includes a cabinet body and a cover body, the cabinet body encloses a receiving space for receiving a backpack battery pack and / or a handheld battery pack, and the cover body is operable to open or close the receiving space.

[0048] In one embodiment, the charging cabinet is provided with a thermal management module configured to perform temperature control on a backpack battery pack and / or a handheld battery pack.

[0049] The present application also provides a working system, including the aforementioned power supply system and an electric tool system; the electric tool system includes a first type of electric tool and a second type of electric tool, the first type of electric tool includes a first tool interface, and the second type of electric tool includes a second tool interface different from the first tool interface.

[0050] In one embodiment, the working system further includes a cart, which includes a main body and rollers for supporting the main body, and the cart is used to transport at least one of the power tool system, the battery pack system, and the energy supply system.

[0051] In one embodiment, the rated power of the first type of power tool is greater than the rated power of the second type of power tool.

[0052] The present application also provides a power supply system, including a battery pack system and an energy supply system; the battery pack system includes a first type battery pack and a second type battery pack, the first type battery pack is configured to be detachably installed on a first type power tool to power it, and the second type battery pack is configured to be detachably installed on a second type power tool to power it; wherein the rated power range of the first type battery pack is 550-3000Wh, and the weight range of the first type battery pack is 4-12Kg; the energy supply system includes a DC charging device, the DC charging device includes an input interface and an output interface, the input interface is configured to detachably install the first type battery pack, and the output interface is configured to detachably install the first type battery pack; the DC charging device also includes at least one DC charging module, the DC charging module is configured to receive the electric energy of the input interface, convert it and transmit it to the output interface, so that the first type battery pack charges the second type battery pack.

[0053] In one embodiment, the first type battery pack is configured to be carried on the back of a user.

[0054] In one embodiment, the power supply system also includes a carrying device, which is configured to be carried by a user. The carrying device includes a cable and a plug interface and a first carrying interface connected by the cable. The first carrying interface is configured to detachably install a first type of battery pack. The plug interface is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the plug interface and the first type of battery pack is installed to the first carrying interface, the first type of battery pack powers the second type of power tool.

[0055] In one embodiment, the first backpack interface includes a pair of first connection parts extending along the first plugging direction, and the first connection parts are used to guide the first type of battery pack to be connected to the backpack device along the first plugging direction.

[0056] In one embodiment, the power supply system also includes a carrying device, which is configured to be carried by a user. The carrying device includes a cable and a plug interface and a second carrying interface connected by the cable. The second carrying interface is configured to detachably install a second type of battery pack. The plug interface is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the plug interface and the second type of battery pack is installed to the second carrying interface, the second type of battery pack supplies power to the second type of power tool.

[0057] In one embodiment, the second backpack interface includes a pair of second connection parts extending along the second plugging direction, and the second connection parts are used to guide the second type battery pack to be connected to the backpack device along the second plugging direction.

[0058] In one embodiment, the first type power tool further comprises a backpack configured for a user to carry the first type power tool, and the first type battery pack is configured to be detachably mounted to the backpack so that the first type battery pack can power the first type power tool.

[0059] In one embodiment, the second type battery pack is configured to be detachably mounted to the first type power tool so that the second type battery pack can power the first type power tool.

[0060] In one embodiment, the ratio of the rated capacity to weight of the first type of battery pack is in the range of 60-300Wh / Kg.

[0061] In one embodiment, the ratio of rated capacity to volume of the first type of battery pack is in the range of 40-220Wh / L.

[0062] In one embodiment, the discharge rate of the first type battery pack is greater than or equal to 2C.

[0063] In one embodiment, the maximum output power of the first type battery pack is greater than or equal to 3KW.

[0064] In one embodiment, an average charging power of the DC charging device for the second type battery pack is greater than an average discharging power of the second type power tool for the second type battery pack.

[0065] In one embodiment, when the second type battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the second type battery pack does not exceed 14°C; and / or when the second type battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the second type battery pack does not exceed 19°C; when the second type battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the second type battery pack does not exceed 24°C.

[0066] In one embodiment, the internal resistance of the single cells in the second type battery pack is less than or equal to 3 mΩ.

[0067] In one embodiment, the weight of the second type battery pack is in the range of 1-3.5 Kg.

[0068] In one embodiment, the rated power to weight ratio of the first type battery pack is in the range of 60-300Wh / Kg, and the maximum allowable charging rate of the second type battery pack is not less than 7C.

[0069] In one embodiment, the discharge rate of the first type battery pack is greater than or equal to 2C.

[0070] In one embodiment, the time required for the second type battery pack to be charged from an empty state to a fully charged state is less than or equal to the time required for the second type battery pack to be discharged from a fully charged state to an empty state.

[0071] In one embodiment, the internal resistance of the single cells in the second type battery pack is less than or equal to 3 mΩ.

[0072] In one embodiment, when the second type battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the second type battery pack does not exceed 14°C; and / or when the second type battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the second type battery pack does not exceed 19°C; when the second type battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the second type battery pack does not exceed 24°C.

[0073] In one embodiment, a ratio of rated capacity to weight of the first type of battery pack is greater than a ratio of rated capacity to weight of the second type of battery pack.

[0074] In one embodiment, the maximum allowable charge rate of the second type battery pack is greater than the maximum allowable charge rate of the first type battery pack.

[0075] In one embodiment, under the condition of the same charging rate, the temperature rise of the second type battery pack is smaller than the temperature rise of the first type battery pack.

[0076] In one embodiment, the internal resistance of the single cells in the second type battery pack is smaller than the internal resistance of the single cells in the first type battery pack.

[0077] In one embodiment, the rated capacity of the first type battery pack is defined as a first capacity, the rated capacity of the second type battery pack is defined as a second capacity, and the first capacity is greater than the second capacity.

[0078] In one embodiment, a ratio of the first capacity to the second capacity is greater than or equal to 2.

[0079] In one embodiment, the DC charging device is only provided with an input interface for receiving power input.

[0080] In one embodiment, the input interface is configured to only receive power input from a first type battery pack and not output power to the outside; the output interface is configured to only output power to a second type battery pack and not receive external power input.

[0081] In one embodiment, the input interface includes a pair of first connection portions extending along a first sliding direction, the first connection portions are used to guide the first type of battery pack to connect to the DC charging device along the first sliding direction; and / or the output interface includes a pair of second connection portions extending along a second sliding direction, the second connection portions are used to guide the second type of battery pack to connect to the DC charging device along the second sliding direction.

[0082] In one embodiment, a maximum dimension of the first connection portion in the first sliding direction is greater than a maximum dimension of the second connection portion in the second sliding direction.

[0083] In one embodiment, the DC charging device includes a shell extending longitudinally along a height direction, and the input interface and the output interface are arranged opposite to each other along a width direction perpendicular to the height direction.

[0084] In one embodiment, the DC charging device further includes a heating module and / or a cooling module configured to heat and / or cool the first type battery pack and the second type battery pack.

[0085] In one embodiment, the energy supply system also includes at least one AC charging device, which includes an input power interface, at least one charging interface and at least one AC charging module. The input power interface is configured to connect to an AC power source, the charging interface is configured to detachably install a first type battery pack and / or a second type battery pack, and the AC charging module is configured to receive AC power from the input power interface, convert it into DC power and output it to the charging interface to charge the first type battery pack and / or the second type battery pack.

[0086] In one embodiment, the charging interface has the same structure as the input interface; and / or, the charging interface has the same structure as the output interface; and / or, the charging interface includes the structure of the input interface and the output interface.

[0087] In one embodiment, the energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is configured to be detachably connected to a first type battery pack and / or a second type battery pack, and the charging module is configured to receive electrical energy from the charging interface and transmit it to the charging cabinet interface to charge the first type battery pack and / or the second type battery pack.

[0088] In one embodiment, the energy supply system further includes a connecting device, the charging cabinet includes an input interface, and the connecting device is configured to connect the charging interface and the input interface to achieve transmission of the electric energy output by the charging interface to the charging cabinet.

[0089] In one embodiment, the connection device includes a cable and an adapter connected to the cable, the cable is configured to be connected to the input interface, and the adapter is configured to be detachably connected to the charging interface.

[0090] In one embodiment, the charging cabinet includes a cabinet body and a cover body, the cabinet body encloses a receiving space for receiving the first type battery pack and / or the second type battery pack, and the cover body is operable to open or close the receiving space.

[0091] In one embodiment, the charging cabinet is provided with a thermal management module, and the thermal management module is configured to perform temperature control on the first type battery pack and / or the second type battery pack.

[0092] The present application also provides a working system, including the aforementioned power supply system and an electric tool system; the electric tool system includes a first type of electric tool and a second type of electric tool, the first type of electric tool includes a first tool interface, and the second type of electric tool includes a second tool interface different from the first tool interface.

[0093] In one embodiment, the working system further includes a cart, which includes a main body and rollers for supporting the main body, and the cart is used to transport at least one of the power tool system, the battery pack system, and the energy supply system.

[0094] In one embodiment, the rated power of the first type of power tool is greater than the rated power of the second type of power tool.

[0095] The present application also provides an energy supply system, including a DC charging device, the DC charging device including an input interface and an output interface, the input interface is configured to detachably install a first type of battery pack, and the output interface is configured to detachably install a second type of battery pack; a DC charging module, the DC charging module is configured to receive electrical energy from the input interface, convert it and transmit it to the output interface, so that the first type of battery pack charges the second type of battery pack; wherein the DC charging device is only provided with an input interface for receiving power input.

[0096] In one embodiment, the input interface is configured to only receive power input from a first type battery pack and not output power to the outside; the output interface is configured to only output power to a second type battery pack and not receive external power input.

[0097] In one embodiment, the input interface includes a pair of first connection portions extending along a first plugging direction, the first connection portions are used to guide a first type of battery pack to connect to a DC charging device along the first plugging direction; and / or the output interface includes a pair of second connection portions extending along a second plugging direction, the second connection portions are used to guide a second type of battery pack to connect to a DC charging device along the second plugging direction.

[0098] In one embodiment, a maximum dimension of the first connection portion in the first plugging direction is greater than a maximum dimension of the second connection portion in the second plugging direction.

[0099] In one embodiment, the DC charging device includes a shell extending longitudinally along a height direction, and the input interface and the output interface are arranged opposite to each other along a width direction perpendicular to the height direction.

[0100] In one embodiment, the DC charging device further includes a heating module and / or a cooling module configured to heat and / or cool the first type battery pack and the second type battery pack.

[0101] In one embodiment, the energy supply system also includes at least one AC charging device, which includes an input power interface, at least one charging interface and at least one AC charging module. The input power interface is configured to connect to an AC power source, the charging interface is configured to detachably install a first type battery pack and / or a second type battery pack, and the AC charging module is configured to receive AC power from the input power interface, convert it into DC power and output it to the charging interface to charge the first type battery pack and / or the second type battery pack.

[0102] In one embodiment, the charging interface has the same structure as the input interface; and / or, the charging interface has the same structure as the output interface; and / or, the charging interface includes the structure of the input interface and the output interface.

[0103] In one embodiment, the energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is configured to be detachably connected to a first type battery pack and / or a second type battery pack, and the charging module is configured to receive electrical energy from the charging interface and transmit it to the charging cabinet interface to charge the first type battery pack and / or the second type battery pack.

[0104] In one embodiment, the energy supply system further includes a connecting device, the charging cabinet includes an input interface, and the connecting device is configured to connect the charging interface and the input interface to achieve transmission of the electric energy output by the charging interface to the charging cabinet.

[0105] In one embodiment, the connection device includes a cable and an adapter connected to the cable, the cable is configured to be connected to an AC charging device, and the adapter is configured to be detachably connected to a charging port.

[0106] In one embodiment, the charging cabinet includes a cabinet body and a cover body, the cabinet body encloses a receiving space for receiving the first type battery pack and / or the second type battery pack, and the cover body is operable to open or close the receiving space.

[0107] In one embodiment, the charging cabinet is provided with a thermal management module, and the thermal management module is configured to perform temperature control on the first type battery pack and / or the second type battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0108] The embodiments of the present application will be further described in conjunction with the following drawings:

[0109] Figure 1 It is a schematic diagram of a working system provided by the present application.

[0110] Figure 2 It is a schematic diagram of an electric tool system provided by the present application.

[0111] Figure 3 It is a schematic diagram of a battery pack system provided in this application.

[0112] Figure 4 This is a schematic diagram showing that the backpack battery pack provided in the present application can power a first type of electric tool.

[0113] Figure 5 It is a schematic diagram of the backpack battery pack provided by the present application installed on a lawn mower.

[0114] Figure 6 It is a schematic diagram of the first tool interface provided by this application.

[0115] Figure 7 It is a schematic diagram of the backpack battery pack provided in this application.

[0116] Figure 8 It is a schematic diagram showing that the handheld battery pack provided in the present application can power a first type of electric tool.

[0117] Fig. 9 It is a schematic diagram of the handheld battery pack provided by the present application being installed on a lawn mower.

[0118] Fig.10It is a schematic diagram of the handheld battery pack provided in this application.

[0119] Fig.11 This is a schematic diagram of the backpack battery pack provided in the present application installed on a backpack hair dryer.

[0120] Fig.12 It is a schematic diagram showing that the handheld battery pack provided in the present application can power a second type of electric tool.

[0121] Fig.13 It is a schematic diagram of the handheld battery pack provided in the present application being installed on a lawn mower.

[0122] Fig.14 This is a schematic diagram of the backpack battery pack provided in the present application powering a second type of electric tool through a backpack device.

[0123] Fig.15 It is a schematic diagram of the carrying device provided by the present application.

[0124] Fig.16 This is a schematic diagram of the handheld battery pack provided in the present application powering a second type of electric tool via a backpack device.

[0125] Fig.17 It is a schematic diagram of the DC charging device provided in the present application at one viewing angle.

[0126] Fig.18 It is a schematic diagram of the DC charging device provided in the present application from another perspective.

[0127] Fig.19 This is a schematic diagram of a backpack battery pack and a handheld battery pack provided in the present application installed on a DC charging device.

[0128] Fig. 20 It is a schematic diagram of another backpack battery pack and handheld battery pack provided in the present application installed on a DC charging device.

[0129] Fig.21 It is a circuit structure diagram of the power supply system provided in this application.

[0130] Fig. 22 It is a schematic diagram of the internal air duct structure of the DC charging device provided in this application.

[0131] Fig.23 It is a structural schematic diagram of the first air duct and the second air duct provided in this application.

[0132] Fig.24 It is a schematic diagram of the AC charging device provided in this application.

[0133] Fig.25 It is a schematic diagram of the charging cabinet provided in this application.

[0134] Fig.26 It is a schematic diagram of the AC charging device and the charging cabinet provided in the present application being connected via a connecting device.

[0135] Fig. 27 It is a circuit structure diagram of an energy supply system provided in this application.

[0136] Fig.28 It is a circuit structure diagram of another energy supply system provided in this application.

[0137] Fig.29 It is a schematic diagram of a cart transport power supply system and electric tool system provided in the present application.

[0138] Fig.30 It is a schematic diagram of an energy supply system provided in this application. DETAILED DESCRIPTION

[0139] The present application will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional changes made by a person of ordinary skill in the art based on these embodiments are all within the scope of protection of the present application.

[0140] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. In the illustrated embodiment, the direction representations, i.e., up, down, left, right, front, and back, etc., are relative, and are used to explain that the structure and movement of different components in this application are relative. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, it is believed that these representations will also change accordingly.

[0141] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0142] Electricity is an environmentally friendly and clean energy source. Therefore, power tools are becoming more and more popular. In particular, garden maintenance work itself has the attribute of green and environmental protection. Therefore, for garden workers or garden companies, power tools are the most ideal choice. However, the main problem with current power tools is insufficient power supply, which cannot support power tools to work continuously for a long time. In addition, garden work is usually carried out outdoors, and there are often no AC power sockets outdoors, resulting in the inability to recharge the power tools in time even if they are used.

[0143] In order to meet the demand for long-term continuous operation of power tools without a mains power socket, a common solution is that users purchase an energy storage power source and a power supply device, the energy storage power source has sufficient power to meet the long-term continuous operation, and then use the power supply device to transmit the power of the energy storage power source to the battery pack that powers the power tool, so that the battery pack can meet the power demand for long-term operation. However, this will bring some problems.

[0144] For commercial gardening tools, a common usage scenario is that 2-3 workers form a team and work outside for a day to trim the gardens of 10-20 families. Once a garden is trimmed, the team will go to another garden and repeat the above process until all the work tasks for the day are completed. It can be seen that the workload of gardening maintenance is very large and the demand for energy is high; at the same time, they will go to multiple work locations in a day and often need to move with work equipment.

[0145] Therefore, for the above solution, since the amount of electricity required for a day's work is very large, the amount of electricity of the energy storage power supply must be set very large, so the cost is bound to be very high, which increases the economic pressure on users. At the same time, due to technical limitations, the energy density of the energy storage unit is generally not high, which leads to a large weight of the energy storage power supply, which makes it inconvenient for users to carry and use it outdoors, and is not conducive to multiple transfer work.

[0146] In order to solve the problem that the working equipment is too heavy to be transferred, one solution is to design multiple energy storage power supplies with relatively small weight and power, but this still cannot solve the problem of high costs. If low-priced energy storage power supplies are used as a cost-reduction measure, it may also bring safety and reliability issues.

[0147] Therefore, the embodiment of the present application provides a different problem-solving approach, which can effectively avoid the above-mentioned problems by reasonably designing a working system. The working system is lightweight and portable, low-cost, and more suitable for gardeners.

[0148] The inventor of the present application keenly recognized that gardeners usually need to purchase two different types of battery packs, backpack battery packs and handheld battery packs, and that the usage scenarios of these two different types of battery packs also differ by season, which is analyzed in detail below.

[0149] There are large differences in the rated power of different garden tools, which can be divided into the following two categories: the first category is high-power power tools, such as lawn mowers, backpack hair dryers, etc.; the second category is low-power power tools, such as handheld hair dryers, lawn mowers, pruning shears, etc. High-power power tools and low-power power tools also have different requirements for battery packs. Generally speaking, the battery pack that powers high-power power tools has a large capacity, so the weight of the battery pack that powers it is also heavy, and users need to carry the battery pack to reduce the pressure of the load; while the battery pack that powers low-power power tools has a relatively small capacity, so the weight of the battery pack that powers it is also lighter, and the battery pack is more portable and cheaper for users to use by hand. Therefore, in order to match the use requirements of power tools of different powers, users need to purchase two different types of battery packs: backpack battery packs and handheld battery packs.

[0150] In addition, the demand for garden tools varies greatly in different seasons, and the demand for corresponding battery packs also varies greatly. For example, in spring and summer, lawns and trees grow lushly, and users have a strong demand for low-power electric tools such as lawn mowers and pruning shears. In autumn, lawn growth stagnates and trees begin to shed leaves. Users no longer need too many lawn mowers and pruning shears, and the demand shifts more to high-power electric tools such as backpack hair dryers for cleaning fallen leaves.

[0151] However, this will lead to the problem of idle battery packs in every season. In spring and summer, users spend most of their time using low-power power tools, so the backpack battery packs that power high-power power tools will be idle; in autumn, users spend most of their time using high-power power tools, so the handheld battery packs that power low-power power tools will be idle, which will lead to the problem of resource waste.

[0152] Therefore, the embodiment of the present application provides a working system, which uses the backpack battery pack that is easily idle in the working system to power the frequently used handheld battery pack, so that the power tool has the ability to work continuously for a long period of time (such as 1 day). During this period of time, the user of the power tool does not have to worry about the problem of insufficient power supply, and the user can effectively use the two types of battery packs in the battery pack system to effectively reduce the idle battery packs. In addition, since the user has already purchased a backpack battery pack, the existing backpack battery pack is used to recharge the handheld battery pack, and there is no need to purchase a separate energy storage power supply. The backpack battery pack is also relatively light, so the working system can also be lightweight and portable and low cost. The working system is described in detail below.

[0153] Specifically, the working system includes a power supply system and an electric tool system. The power supply system includes a battery pack system and an energy supply system. The power supply system is used to provide sufficient power supply for the electric tool system. The electric tool system includes a first type of electric tool and a second type of electric tool. The first type of electric tool includes garden-type electric tools such as lawn mowers and backpack hair dryers. The second type of electric tool generally includes garden-type electric tools such as handheld hair dryers, grass trimmers, and pruning machines, which are used for garden repair work. The battery pack system includes at least one backpack battery pack and at least one handheld battery pack, which are used to power the electric tool system, wherein the backpack battery pack is configured to be detachably mounted to the first type of electric tool to power it, and the handheld battery pack is configured to be detachably mounted to the second type of electric tool to power it. The energy supply system includes a DC charging device, which is used to convert the power of the backpack battery pack and supply it to the handheld battery pack.

[0154] When the work team carries the above-mentioned work system to work outside, the backpack battery pack can power the power tools. In other words, the backpack battery pack can be used as a tool bag, and the backpack battery pack can also be used as an energy storage pack to power the handheld battery pack. This can not only solve the problem of seasonal idleness of the backpack battery pack, but also enable the handheld battery pack to be recharged in time, so that a small number of handheld battery packs can be recycled. There is no need to carry and purchase a large number of battery packs, so that the power tool system can work for a long time and improve work efficiency. In addition, the backpack battery pack can be carried on the back, is light in weight, and is easy to carry and use. In addition, users can use the handheld battery pack more, and the handheld battery pack can be directly installed on the second type of power tool for use, without having to carry it on the back, which is more portable and cheaper for users to use.

[0155] like Figure 1As shown, a typical application scenario of the above-mentioned work system is: when the work team goes out to work during the day, the work team carries the work system 1, and the work system 1 includes the electric tool system 10, the battery pack system 20 and the energy supply system 30 required for the work. Among them, the electric tool system 10 includes a first-type electric tool system 11 and a second-type electric tool system 12, and the battery pack system 20 includes a backpack battery pack system 21 and a handheld battery pack system 22. The first-type electric tool system 11 includes at least one first-type electric tool, the second-type electric tool system 12 includes at least one second-type electric tool, the backpack battery pack system 21 includes at least one backpack battery pack, and the handheld battery pack system 22 includes at least one handheld battery pack. Among them, the backpack battery pack is configured to be detachably mounted to the first-type electric tool to power it, the handheld battery pack is configured to be detachably mounted to the second-type electric tool to power it, and the backpack battery pack is configured to be able to be carried by the user.

[0156] In some embodiments, Figure 2 As shown, the first type of electric tools are configured as gardening electric tools such as lawn mowers 110 and backpack hair dryers 120, and the second type of electric tools are configured as gardening electric tools such as handheld hair dryers 130, grass trimmers 140, and pruning machines 150. In some embodiments, as Figure 3 As shown, the backpack battery pack system 21 includes at least one backpack battery pack 200, 200', the handheld battery pack system 22 includes at least one handheld battery pack 210, 210'; and the energy supply system 30 includes at least one DC charging device.

[0157] The power tool system 2 may include one or more first-type power tools and second-type power tools. The number of first-type power tools and second-type power tools may be the same or different. For example, if the work content that the power tool system needs to perform is relatively simple, it can be completed by one first-type power tool and one second-type power tool. At this time, only one first-type power tool and one second-type power tool may be configured for the user of the working system 1. For another example, if the work content that the power tool system 2 needs to perform is diverse, it requires multiple first-type power tools and multiple second-type power tools to cooperate with each other to complete it. In this case, multiple first-type power tools and multiple second-type power tools may be configured for the user of the working system 1. Among them, the rated power of the first-type power tool is defined as the first rated power, and the rated power of the second-type power tool is defined as the second rated power, and the first rated power is greater than the second rated power.

[0158] The battery pack system 20 may include one or more backpack battery packs and handheld battery packs. The backpack battery packs and handheld battery packs may be the same or different. The battery pack system 20 may be divided into two groups, one group being a working battery pack and the other group being a backup battery pack. The number of battery packs in each group may be set according to the number of power tools required to work simultaneously. Among them, the working battery pack refers to the battery pack that is powering the power tool, and the backup battery pack refers to the battery pack that is temporarily not powering the power tool. The working battery pack may include only a handheld battery pack, or a handheld battery pack and a backpack battery pack, and the backup battery pack needs to include at least one handheld battery pack and at least one backpack battery pack. The backup battery pack may be a battery pack installed on a DC charging device, or a battery pack that is neither installed on a DC charging device nor on a power tool. When the handheld battery pack in the working battery pack is exhausted, it can be installed on a DC charging device to be recharged by the backpack battery pack, and the handheld battery pack in the spare battery pack can take over; when the backpack battery pack in the working battery pack is exhausted, the backpack battery pack in the spare battery pack can take over.

[0159] As an optional method, the number of working battery packs can be the same as the number of power tools working at the same time. The number of spare battery packs is the same as the number of working battery packs, or the number of spare battery packs can be more than the number of working battery packs to prevent the number of spare battery packs from being unable to support the uninterrupted operation of the power tool when one of the working battery packs is damaged. For example, the work team usually consists of 2 people. When working in a garden, one worker uses a lawn mower 110 to mow the grass. During mowing, another worker will use a handheld power tool to complete other types of work in sequence. For example, another worker will first mow the grass, then prune the branches, and then blow the grass. The two workers complete all the work at almost the same time, so there are two power tools working at the same time. When configuring the number of battery packs in the battery pack system, two working battery packs and three or four spare battery packs can be configured. The above battery pack configuration method is only an example. In actual use, the user can configure it according to the type of power tool, with the least number of battery packs and uninterrupted use in rotation as the standard.

[0160] As another optional method, the number of working battery packs can be set according to the number of power tools in the power tool system. Preferably, the number of working battery packs is the same as the number of power tools in the power tool system, and the number of backup battery packs can be equal to the number of working battery packs. When the work team is out working, they can pre-install a battery pack for each power tool they carry, so that when switching from one power tool to another, there is no need to install the battery pack and the tool can be used directly, which is more in line with the workers' usage habits when using traditional fuel tools. For example, before the work team goes to work in each garden, they can install a battery pack for each of the lawn mower 110, backpack blower 120, handheld blower 130, grass trimmer 140 and pruning machine 150 in advance. When one worker uses the lawn mower 110 to mow the grass, another worker uses the grass trimmer 140 to trim the grass. After the trimming work is completed, the workers can directly use the pruning machine 150 for pruning without installing a battery pack for the pruning machine 150; after the pruning work is completed, the backpack blower 120 or the handheld blower 130 can be used for blowing air directly without installing a battery pack for the backpack blower 120 or the handheld blower 130.

[0161] It should be noted that when there are multiple backpack battery packs and handheld battery packs (greater than or equal to 2) in the battery pack system, the multiple backpack battery packs all have the same interface for installation to the first tool interface and the input interface. The multiple backpack battery packs may all be of the same type, or all of different types, or some of the backpack battery packs may be of the same type and some of the backpack battery packs may be of different types. Similarly, the multiple handheld battery packs all have the same interface for installation to the second type of power tool. The multiple handheld battery packs may all be of the same type, or all of different types, or some of the handheld battery packs may be of the same type and some of the handheld battery packs may be of different types. The “different types of battery packs” mentioned here refer to one or more of the differences in the capacity of the single cell, the type of the single cell, the internal structure of the battery pack, the appearance of the battery pack, etc. In some embodiments, such as Figure 3 As shown, the backpack battery pack system 21 includes two backpack battery packs 200 and 200', and the handheld battery pack system 22 includes two handheld battery packs 210 and 210', wherein the capacity, type of single battery cells, internal structure and appearance of the two backpack battery packs 200 and 200' are different, and the capacity, type of single battery cells, internal structure and appearance of the two handheld battery packs 210 and 210' are also different.

[0162] The energy supply system includes X DC charging devices, where X is a positive integer not less than 1. The work team can carry one or more DC charging devices according to work needs to complete the required power conversion.

[0163] The following first introduces the specific structure and application scenarios of the backpack battery pack and handheld battery pack in the battery pack system when used as tool packs and installed with the power tool system.

[0164] The backpack battery pack is configured to be mounted on a first type of power tool to power the first type of power tool, wherein the backpack battery pack is configured to be carried by a user. Specifically, the first type of power tool includes a first tool interface, and the backpack battery pack is configured to be detachably mounted to the first tool interface. In some embodiments, Figure 4 As shown, the first type power tool system 11 includes two first type power tools, namely a lawn mower 110 and a backpack hair dryer 120, wherein the lawn mower 110 includes a first tool interface 111, and the backpack hair dryer 120 includes a first tool interface 121. The first tool interfaces 111 and 121 have the same structure, and the backpack battery packs 200 and 200' can be detachably installed to the first tool interfaces 111 and 121.

[0165] Take the installation of the backpack battery pack 200 and the lawn mower 110 as an example. Figure 5 and Figure 6 As shown, the first tool interface 111 includes a pair of first guide portions 111a and 111b extending along the first sliding direction A1, and the first guide portions 111a and 111b are used to guide the backpack battery pack 200 to be slidably installed on the lawn mower 110 along the first sliding direction A1. Of course, the backpack battery pack 200 can also be slidably removed from the lawn mower 110 along the direction opposite to the first sliding direction A1.

[0166] Correspondingly, Figure 7 As shown, the backpack battery pack 200 includes a backpack battery pack interface 201, and the backpack battery pack interface 210 includes a pair of first matching parts 201a, 201b, and the pair of first matching parts 201a, 201b are used to cooperate with a pair of first guide parts 111a, 111b respectively to achieve a sliding connection between the lawn mower 110 and the backpack battery pack 200.

[0167] In some embodiments, the handheld battery pack is also configured to be detachably mounted to the first type of power tool so that the handheld battery pack can power the first type of power tool. The first type of power tool can be adapted to two types of backpack battery packs and handheld battery packs with different interfaces, which is conducive to achieving the versatility of the battery pack system. When the backpack battery pack in the working battery pack is exhausted, the first type of power tool can be powered by either the backpack battery pack in the backup battery pack or the handheld battery pack in the backup battery pack. In some embodiments, Figure 8As shown, the handheld battery packs 210 and 210 ′ can be detachably mounted to the lawn mower 110 and the backpack blower 120 , so that the handheld battery packs 210 and 210 ′ can power the lawn mower 110 and the backpack blower 120 .

[0168] In some embodiments, the first type of power tool further includes a third tool interface, and the third tool interface is configured to detachably mount a handheld battery pack so that the handheld battery pack can power the first type of power tool. Fig. 9 As shown, taking the installation of the handheld battery pack 210 and the lawn mower 110 as an example, the lawn mower 110 further includes a third tool interface 113 , and the handheld battery pack 210 is detachably mounted on the third tool interface 113 to power the lawn mower 110 .

[0169] Specifically, Figure 6 As shown, the third tool interface 113 includes a pair of third guide portions 113a and 113b extending along the third sliding direction A3, and the third guide portions 113a and 113b are used to guide the handheld battery pack 210 to slide along the third sliding direction A3 and be installed on the lawn mower 110. Of course, the handheld battery pack 210 can also be slid and removed from the lawn mower 110 along the direction opposite to the third sliding direction A3. In this embodiment, the third sliding direction A3 is parallel to the first sliding direction A1.

[0170] Furthermore, the pair of first guides 111a, 111b and the pair of third guides 113a, 113b are independent of each other, and in the width direction perpendicular to the up-down direction, the pair of first guides 111a, 111b are located on both sides of the pair of third guides 113a, 113b. This arrangement reduces the size of the first tool interface and the third tool interface, which is conducive to miniaturization of the first type of electric tool. It should be noted that "the pair of first guides and the pair of third guides are independent of each other" can be understood as the function of the pair of first guides and the function of the pair of third guides are independent of each other. In other words, the function of the pair of first guides 111a, 111b for guiding the backpack battery pack 200 to be installed on the lawn mower 110 along the first sliding direction A1 and the function of the pair of third guides 113a, 113b for guiding the handheld battery pack 210 to be installed on the lawn mower 110 along the third sliding direction A3 will not cross each other.

[0171] In addition, “a pair of first guide portions 111a, 111b are located on both sides of a pair of third guide portions 113a, 113b” can be understood as, one 111a of the pair of first guide portions is located on the outside of one 113a of the pair of third guide portions, the other 111b of the pair of first guide portions is located on the outside of the other 113b of the pair of third guide portions, and in the width direction B perpendicular to the first sliding direction A1 and the third sliding direction A3, the spacing between the pair of first guide portions 111a, 111b is greater than the spacing between the pair of third guide portions 113a, 113b.

[0172] like Figure 6 As shown, a pair of first guide portions 111a and 111b are arranged in opposite directions, and a pair of third guide portions 113a and 113b are arranged in opposite directions. Based on this arrangement, a pair of first guide portions 111a and 111b are arranged as a pair of outer guide rails, and a pair of third guide portions 113a and 113b are arranged as a pair of inner guide rails. Correspondingly, as shown in FIG. Figure 7 and Fig.10 As shown, the pair of first matching portions 201a, 201b are configured as a pair of inner guide grooves, and the pair of second matching portions 211a, 211b are configured as a pair of outer guide grooves.

[0173] Of course, those skilled in the art can also arrange the pair of first guide parts to face each other, that is, to form a pair of inner guide rails, and arrange the pair of second guide parts to face each other, that is, to form a pair of outer guide rails, and correspondingly, arrange the pair of first matching parts to form a pair of outer guide grooves, and the pair of second matching parts to form a pair of inner guide grooves; or arrange the pair of first guide parts and the pair of second guide parts to form a pair of outer guide rails, and correspondingly, arrange the pair of first matching parts and the pair of second matching parts to form a pair of inner guide grooves; or arrange the pair of first guide parts and the pair of second guide parts to form a pair of inner guide rails, and correspondingly, arrange the pair of first matching parts and the pair of second matching parts to form a pair of outer guide grooves. The present application does not limit the arrangement of the first guide part, the second guide part, the first matching part, and the second matching part.

[0174] Since the volume of a backpack battery pack is usually larger than that of a handheld battery pack, the maximum dimension of the first guide portion 111a, 111b in the first sliding direction A1 is larger than the maximum dimension of the third guide portion 113a, 113b in the third sliding direction A3; similarly, the maximum dimension of the first matching portion 201a, 201b in the first sliding direction A1 is larger than the maximum dimension of the second matching portion 211a, 211b in the third sliding direction A3.

[0175] Furthermore, the lawn mower 110 also includes a first support portion 130 and a second support portion 131, a pair of first guide portions 111a, 111b include a pair of first extension portions 111a1, 111b1 extending along the first sliding direction A1, a pair of second guide portions 113a, 113b include a pair of second extension portions 113a1, 113b1 extending along the third sliding direction A3, the first extension portion 111a1 protrudes from the outer side of the first support portion 130 in the width direction, the first extension portion 111b1 protrudes from the outer side of the second support portion 131 in the width direction B, the second extension portion 113a1 protrudes from the inner side of the first support portion 130 in the width direction B, and the second extension portion 113b1 protrudes from the inner side of the second support portion 131 in the width direction.

[0176] In other words, one of the pair of first extensions 111a1 and one of the pair of second extensions 113a1 share the first support portion 130, and the other of the pair of first extensions 111b1 and the pair of second extensions 113b1 share the second support portion 131. This arrangement can make the layout of the first tool interface compact, thereby reducing the space occupied by the first tool interface, and thus reducing the volume of the power tool.

[0177] It should be noted that the outer side of the first support portion 130 and the second support portion 131 refers to the side of the first support portion 130 and the second support portion 131 away from the center line of the pair of first guide portions 110a, 110b and the pair of second guide portions 120a, 120b, and the inner side of the first support portion 130 and the second support portion 131 refers to the side of the first support portion 130 and the second support portion 131 close to the center line of the pair of first guide portions and the pair of second guide portions.

[0178] Furthermore, the first guide portion 111a further includes an outer side wall 132 of the first support portion 130, and the first guide portion 111b further includes an outer side wall 133 of the second support portion 131. Figure 7 As shown, the first matching portion 201a includes an inner side wall (not shown) matched with the first extension portion 111a, and a first contact portion 201a1 matched with the outer side wall 132, and the first matching portion 201b includes an inner side wall (not shown) matched with the first extension portion 111b, and a first contact portion 201b1 matched with the outer side wall 133. Therefore, when the backpack battery pack 200 is slidably matched to the lawn mower 110 along the first sliding direction A1, the first extension portion 111a1, the outer side wall 132, the second extension portion 111b1 and the outer side wall 133 together guide and limit the backpack battery pack 200.

[0179] Similarly, the second guide portion 113a further includes the inner side wall 134 of the first support portion 130, and the second guide portion 113b further includes the inner side wall 135 of the second support portion 131. Fig.10 As shown, the second matching portion 211a includes an outer wall 212 matched with the second extension portion 113a1, and a second contact portion 211a1 matched with the inner wall 134, and the second matching portion 211b includes an outer wall 213 matched with the second extension portion 113b1, and a second contact portion 211b1 matched with the inner wall 134. Therefore, when the handheld battery pack 210 is slidably matched to the lawn mower 110 along the second sliding direction A2, the second extension portion 113a1, the inner wall 134, the second extension portion 113b1 and the inner wall 135 together guide and limit the handheld battery pack 210.

[0180] In some embodiments, the lawn mower 110 further includes a plurality of first tool pole pieces 111c located between a pair of second guide portions 120a, 120b, and the first tool pole pieces 111c are evenly distributed along the width direction B. Correspondingly, the backpack battery pack 200 includes a plurality of backpack battery pack pole pieces (not shown) located between the first mating portions 201a, 201b, and the handheld battery pack 210 includes a plurality of handheld battery pack pole pieces (not shown) located between the second mating portions 211a, 211b. When the backpack battery pack 200 is mated with the lawn mower 110, the first tool pole piece 111c is used to be electrically connected to the corresponding backpack battery pack pole piece to achieve power transmission between the backpack battery pack 200 and the lawn mower 110; when the handheld battery pack 210 is mated with the lawn mower 110, the first tool pole piece 111c is used to be electrically connected to the corresponding handheld battery pack pole piece to achieve power transmission between the handheld battery pack 210 and the lawn mower 110.

[0181] It should be noted that the first tool pole piece, the backpack battery pack pole piece and the handheld battery pack pole piece can be set in any form that can be easily thought of by a person skilled in the art, and this application will not go into details here.

[0182] Both the backpack battery pack and the handheld battery pack can be matched with the first tool pole piece, making the structure simple and compact, which is conducive to the miniaturization of the first type of electric tool.

[0183] The lawn mower 110 is provided with a terminal base 115, and the first tool pole piece 111c is at least partially mounted on the terminal base 115. Figure 7 As shown, the backpack battery pack 200 is provided with a plurality of first terminal slots 205 located between a pair of first matching portions 201a, 201b, and each backpack battery pack electrode is at least partially accommodated in the corresponding first terminal slot 205; Fig.10As shown, the handheld battery pack 210 is provided with a plurality of second terminal slots 215 located between a pair of second matching portions 211 a and 211 b , and each handheld battery pack electrode is at least partially received in a corresponding second terminal slot 215 .

[0184] like Figure 6 As shown, the lawn mower 110 further includes a locking member 150 located between a pair of second guide portions 113a, 113b. Figure 7 As shown, the backpack battery pack 200 includes a first locking portion 250 located between a pair of first matching portions 201a, 201b. Fig.10 As shown, the handheld battery pack 210 includes a second locking portion 260 located between a pair of second mating portions 211a, 211b. When the backpack battery pack 200 is mated with the lawn mower 110, the locking member 150 is used to cooperate with the first locking portion 250 to lock the backpack battery pack 200 and the lawn mower 110; when the handheld battery pack 210 is mated with the lawn mower 110, the locking member 150 is used to cooperate with the second locking portion 260 to lock the handheld battery pack 210 and the lawn mower 110.

[0185] When mated with the first type of electric tool, the backpack battery pack and the handheld battery pack can share the locking member 150, making the structure simple and compact, which is conducive to miniaturization of the first type of electric tool.

[0186] In this embodiment, the locking member 150 is configured as a buckle, and the first locking portion 250 and the second locking portion 350 are configured as a slot that matches the buckle. Of course, the locking member, the first locking portion, and the second locking portion can also be configured in other forms, such as the locking member is configured as a slot, and the first locking portion and the second locking portion are configured as a buckle that matches the slot, and this application does not limit this.

[0187] Further, such as Figure 5 As shown, the lawn mower 110 further includes a trigger 151, which can drive the locking member 150 to move from the locked position to the unlocked position. When the locking member 150 is in the locked position, the locking member 150 cooperates with the first locking portion 250 or the second locking portion 350 to lock the lawn mower 110 and the backpack battery pack 200 or the handheld battery pack 210; when the locking member 150 is in the unlocked position, the locking member 150 disengages from the first locking portion 250 or the second locking portion 260, and the lawn mower 110 is unlocked from the backpack battery pack 200 or the handheld battery pack 210. In this embodiment, the trigger 151 is configured as a button.

[0188] In the above embodiments, the backpack battery pack 200 or the handheld battery pack 210 is directly mounted on the lawn mower 110 , and the user does not need to carry the battery pack when the lawn mower 110 is working.

[0189] In other embodiments, when the first type of electric tool is working, the user needs to carry the battery pack on his back, so as to facilitate use and carrying. Fig.11 As shown, the backpack hair dryer 120 also includes a main body 122 and a backpack frame 125 connected to the main body, the backpack frame 125 is configured for a user to carry the backpack hair dryer 120, and the backpack battery pack 120 is configured to be detachably mounted to the backpack frame 125 so that the backpack battery pack 200 can power the backpack hair dryer 120.

[0190] Specifically, the back frame 125 is disposed at one end of the main body 122, and is detachably connected or fixedly connected to the main body 122. The back frame 123 includes a support plate 127 and a shoulder strap (not shown) and / or a waist belt (not shown) connected to the support plate 127, which can be carried by the user. The back frame 125 is provided with a first tool interface 121, and the first tool interface 121 is disposed on the support plate 127. When the user needs to use the backpack hair dryer 120, the backpack battery pack 200 can be installed on the back frame 125, and the user can carry the backpack hair dryer 120 by means of the back frame 125. The battery pack is carried by the user's back and / or waist, which reduces the force on the user's hands and enables the user to use it more comfortably.

[0191] In order to enable the battery pack system to supply power alternately, in some embodiments, a third tool interface 123 is also provided on the back frame 125, and the handheld battery packs 210 and 210' can be detachably installed on the third tool interface 123, so that the handheld battery packs 210 and 210' can power the backpack hair dryer 120.

[0192] Specifically, the structure of the first tool interface 121 may refer to the structure of the first tool interface 141 , and the structure of the third tool interface 123 may refer to the structure of the third tool interface 113 , which will not be described in detail herein.

[0193] Furthermore, in order to achieve a compact structure of the back frame, the positional relationship between the first tool interface 121 and the third tool interface 123 is the same as the positional relationship between the first tool interface 111 and the third tool interface 113, which will not be repeated here.

[0194] The second type of power tool includes a second tool interface, and the handheld battery pack is configured to be detachably mounted to the second tool interface so that the handheld battery pack can power the second type of power tool. Fig.12As shown, the second type power tool system 12 includes three second type power tools, namely a handheld hair dryer 130, a grass trimmer 140 and a pruner 150, wherein the handheld hair dryer 130 includes a second tool interface 131, the grass trimmer 140 includes a second tool interface 141, and the pruner 150 includes a second tool interface 151. The second tool interfaces 131, 141, and 151 are of the same shape, and the handheld battery packs 210 and 210' can be detachably installed to the second tool interfaces 131, 141, and 151.

[0195] Take the installation of the handheld battery pack 210 and the lawn mower 140 as an example. Fig.13 As shown, the second tool interface 141 includes a pair of second guide portions 141a and 141b extending along the second sliding direction A2, and the second guide portions 141a and 141b are used to guide the handheld battery pack 210 to be slidably mounted to the mower 140 along the second sliding direction A2. Of course, the handheld battery pack 210 can also be slidably removed from the mower 140 along the direction opposite to the second sliding direction A2.

[0196] The structure of the second tool interface 141 is substantially the same as that of the third tool interface 113, and will not be described in detail herein. Fig.10 As shown, the pair of second matching portions 211 a and 211 b are used to respectively cooperate with the pair of second guiding portions 141 a and 141 b to achieve the installation of the grass trimmer 140 and the handheld battery pack 210 .

[0197] It should be noted that the first tool interface, the second tool interface, the third tool interface, the backpack battery pack interface, and the handheld battery pack interface may also be in other matching forms as long as they can meet the connection requirements of the battery pack and the power tool.

[0198] Furthermore, the second tool interface also includes a plurality of second-type electric tool pole pieces for electrically connecting to the handheld battery pack. Taking the grass trimmer 140 as an example, the second tool interface 141 includes a plurality of second-type electric tool pole pieces 141c. In a direction perpendicular to the second sliding direction A2, the second-type electric tool pole piece 141c is located between a pair of second guide portions 141a and 141b. Correspondingly, the handheld battery pack pole piece (not shown) is used to connect to the second-type electric tool pole piece 141c, thereby realizing the electrical connection between the handheld battery pack and the second-type electric tool.

[0199] In some embodiments, the backpack battery pack can also power a second type of power tool to achieve the versatility of the battery pack. Fig.14 and Fig.15As shown, the backpack battery packs 200 and 200' can both power the handheld hair dryer 130, the grass trimmer 140, and the pruning machine 150. Taking the backpack battery pack 200 powering the grass trimmer 140 as an example, Fig.15 As shown, the power supply system also includes a backpack device 600, which is configured to be carried by a user. The backpack device 600 includes a cable 610 and a plug interface 620 and a first backpack interface 630 connected by the cable 610. The first backpack interface 630 is configured to detachably install a backpack battery pack 200. The plug interface 620 is configured to detachably connect to a second tool interface 141. When the second tool interface 141 is connected to the plug interface 620 and the backpack battery pack 200 is installed to the first backpack interface 630, the backpack battery pack 200 supplies power to the lawn mower 140.

[0200] Among them, the structure of the plug-in interface 620 is configured to be basically the same as the structure of the handheld battery pack interface 211, and the structure of the first backpack interface 630 is configured to be basically the same as the structure of the first tool interface 111, which will not be repeated here.

[0201] In some embodiments, in order to meet the needs of some users who prefer to carry the battery pack on their backs, the handheld battery pack can also be used to power the second type of power tool through the carrying device. Fig.16 As shown, the handheld battery packs 210 and 210' can both be used to power the handheld hair dryer 130, the grass trimmer 140 and the pruning machine 150 through the backpack 600. For example, the handheld battery pack 210 powers the grass trimmer 140 through the backpack 600. Fig.15 As shown, the backpack device 600 includes a second backpack interface 640, which is configured to detachably mount the handheld battery pack 210, and the plug interface 620 is configured to detachably connect the second tool interface 640. When the grass trimmer 140 is connected to the plug interface 620 and the handheld battery pack 210 is mounted to the second backpack interface 640, the handheld battery pack 210 supplies power to the grass trimmer 140. The structure of the second backpack interface 640 is configured to be substantially the same as that of the second tool interface 141, which will not be described in detail herein. By providing a first backpack interface on which a backpack battery pack can be mounted and a second backpack interface on which a handheld battery pack can be mounted on the backpack device, it is avoided to additionally set up a new backpack device, which can save costs and reduce carrying pressure.

[0202] Furthermore, in order to achieve a compact structure of the carrying device, the positional relationship between the first carrying interface 630 and the second carrying interface 640 is the same as the positional relationship between the first tool interface 111 and the third tool interface 113, which will not be repeated here.

[0203] Since commercial garden power tools are usually heavy, directly connecting the battery pack to the power tool will cause excessive burden on the user. The backpack battery pack and / or handheld battery pack can be detachably installed on the backpack device through the backpack device, making it convenient and labor-saving for the user during work.

[0204] In order to make the working system as light as possible while meeting the requirement that the backpack battery pack can be carried for use, in some embodiments, the weight range of a single backpack battery pack is set to 4-12Kg. Optionally, the weight of a single backpack battery pack is set to 5-10Kg, for example, 5Kg, 8Kg, 10Kg or others.

[0205] Similarly, in order to avoid the impact of excessive volume on use and carrying, in some embodiments, the volume range of a single backpack battery pack is set to 3-20L, and optionally, the weight of a single backpack battery pack is set to 5-15L, such as 5L, 10L, 15L or others.

[0206] As mentioned before, the backpack battery pack not only needs to be used as a tool kit to power electric tools, but also needs to be used as an energy storage pack to power handheld battery packs. The following details the requirements for using the backpack battery pack as an energy storage pack.

[0207] Since the backpack battery pack needs to be used as an energy storage pack to charge the handheld battery pack, the backpack battery pack needs to have sufficient power. In some embodiments, the rated power range of a single backpack battery pack is set to 550-3000Wh. Optionally, the rated power range of a single backpack battery pack is set to 1000-2000Wh, for example, 1000Wh, 1500Wh, 2000Wh or others.

[0208] Since the weight of the backpack battery pack should not be too large and sufficient power is required, the backpack battery pack needs to store enough power per unit mass. In some embodiments, the ratio of the rated power to weight of a single backpack battery pack is set to 60-300Wh / Kg. Optionally, the ratio of the rated power to weight of a single backpack battery pack is set to 80-200Wh / Kg, for example, 80Wh / Kg, 100Wh / Kg, 200Wh / Kg or others.

[0209] Similarly, the volume of the backpack battery pack should not be too large and needs to have sufficient power, so the backpack battery pack needs to store enough power per unit volume. In some embodiments, the ratio of the rated power to volume of a single backpack battery pack is set to 40-220Wh / L. Optionally, the ratio of the rated power to volume of a single backpack battery pack is set to 60-150Wh / L, for example, 60Wh / L, 100Wh / L, 150Wh / L or others.

[0210] As mentioned before, since the working system needs to meet the power supply demand for a long time, the handheld battery pack needs to be fully charged as soon as possible after it is exhausted so as to be put into circulation. In order to charge the handheld battery pack quickly, the backpack battery pack needs to provide a larger output power to the handheld battery pack. Due to technical and weight limitations, the amount of power stored in the backpack battery pack is limited. Since the discharge rate of the battery pack is the ratio of the output power of the battery pack to the rated power of the battery pack, that is, the greater the output power of the battery pack, the greater the discharge rate of the battery pack. Therefore, the backpack battery pack needs to discharge the handheld battery pack at a larger discharge rate. In some embodiments, the discharge rate of the backpack battery pack is greater than or equal to 2C. Optionally, the discharge rate of the backpack battery pack is set to 4-10C, such as 4C, 5C, 10C or others.

[0211] The backpack battery pack used to supplement the power of the handheld battery pack needs to have a large output power to support charging the handheld battery pack at a large discharge rate. In some embodiments, the maximum output power of the backpack battery pack is greater than or equal to 2Kw. Optionally, the maximum output power of the backpack battery pack is set to 2-3.5Kw, such as 2Kw, 2.5Kw, 3Kw, 3.5Kw or others.

[0212] In order for the backpack battery pack to support high-power discharge, the single cells in the backpack battery pack also need to support high-rate discharge. In one embodiment, the discharge rate of the single cells in the backpack battery pack ranges from 1.5C to 3C. For example, the discharge rate of the single cells in the backpack battery pack can be set to 2C.

[0213] Furthermore, the continuous discharge rate of the backpack battery pack is not less than 1C, that is, during the continuous discharge process from the remaining power of the backpack battery pack being greater than or equal to 90% to the remaining power being at least less than or equal to 10%, the discharge rate is not less than 1C. Thus, the backpack battery pack can support a larger output power and quickly charge the handheld battery pack.

[0214] If the internal resistance of the single cell of the backpack battery pack is too large, it will affect the discharge rate of the backpack battery pack; if the internal resistance of the single cell of the backpack battery pack is too small, it will greatly increase the cost. Optionally, the internal resistance of the single cell of the backpack battery pack is greater than or equal to 10mΩ and less than or equal to 25mΩ, such as 10mΩ, 15mΩ, 20mΩ or others.

[0215] In actual work, the application scenarios of backpack battery packs as energy storage packs are far more than those as tool kits. Therefore, there are not too many requirements for the backpack battery pack to be able to be put into use cyclically. In other words, the backpack battery pack has relatively low requirements for the real-time charging. Therefore, in some embodiments, the charging rate of the single cell in the backpack battery pack can be set lower, thereby reducing the cost of the single cell. For example, setting the charging rate of the single cell in the backpack battery pack to be lower than the charging rate of the single cell in the handheld battery pack can make the two types of cells cooperate with each other, thereby making the cell cost of the power supply system lower. Optionally, the charging rate of the single cell in the backpack battery pack ranges from 0.2C to 1C. For example, the charging rate of the single cell in the backpack battery pack can be set to 0.75C.

[0216] In order to enable the backpack battery pack to support high-power discharge when used as an energy storage pack and to match the working voltage (or voltage platform) of the power tool when used as a tool pack, the rated voltage of the backpack battery pack is not less than 40 V. In one embodiment, the rated voltage of the backpack battery pack is set to 54 V.

[0217] In order to meet the working requirements, the capacity of the single cell in the backpack battery pack is not less than 4AH. In some embodiments, the capacity of the single cell in the backpack battery pack is 5AH, and the number of single cells in the backpack battery pack is 75. The rated voltage of each single cell is 3.6V. By connecting 5 single cells in parallel to form a battery cell group, 15 battery cell groups are connected in series to output 54V.

[0218] As mentioned above, the handheld battery pack needs to be used frequently as a tool kit, and its power needs to be fully charged as soon as possible for cyclic use. The following describes in detail how the handheld battery pack meets the requirements for cyclic use.

[0219] In order to enable the handheld battery pack to be used uninterruptedly, the time required to charge the handheld battery pack from an empty state to a fully charged state is less than the time required to discharge the handheld battery pack from a fully charged state to an empty state. In some embodiments, the average charging power of the DC charging device to the handheld battery pack is greater than the average discharge power of the second type of power tool to the handheld battery pack. It should be noted that the "empty state" of the battery pack refers to the remaining power of the battery pack being less than or equal to 5%, and the "full state" of the battery pack refers to the remaining power of the battery pack being greater than or equal to 95%.

[0220] In order to improve the charging speed of the handheld battery pack, a single cell with a larger charging rate can be configured for the handheld battery pack so that the handheld battery pack can be charged at a large rate. In one embodiment, the maximum allowable charging rate of the single cell in the handheld battery pack is not less than 7C. Optionally, the maximum allowable charging rate of the single cell in the handheld battery pack is set to 7-12C, such as 7C, 10C, 12C or others.

[0221] In addition, in order to meet the power supply requirements for high-power electric tools, the handheld battery pack also needs to be configured with single cells with a larger discharge rate, so that the handheld battery pack can discharge at a large rate. In some embodiments, the discharge rate of the single cells in the handheld battery pack is not less than 5C. Optionally, the discharge rate of the single cells in the handheld battery pack is set to 5-10C, such as 5C, 7C, 10C or others.

[0222] The rated voltage (or voltage platform) of the handheld battery pack can be designed according to the operating voltage (or voltage platform) of the power tool. The rated voltage of the handheld battery pack generally needs to match the operating voltage of the power tool. In some embodiments, the rated voltage of the handheld battery pack can be designed to be higher, for example, not less than 40V. In some embodiments, the rated voltage of the handheld battery pack is also set to 54V. Under the condition of a certain discharge rate, designing the rated voltage of the handheld battery pack to be higher can increase the discharge power of the handheld battery pack, thereby supporting the power tool to operate at a higher power.

[0223] The maximum charge and discharge cycle number of large-capacity battery packs on the market is generally within 1,000 times, and the maximum charge and discharge cycle number of common large-capacity battery packs is 300-500 times. A low charge and discharge cycle number will result in a shorter battery pack life and require frequent replacement, which undoubtedly increases the cost of using the work system. Taking garden trimming work as an example, if a large-capacity battery pack with a maximum charge and discharge cycle number of 300-500 is used, a new battery pack will need to be purchased after a few months at most, which will obviously lead to a higher cost of the work system.

[0224] In order to solve the above problems, in some embodiments, the maximum charge and discharge cycle number of the single cell in the handheld battery pack is designed to be no less than 1000 times to ensure the service life of the handheld battery pack. Even if a battery pack needs to be charged and discharged three times a day, 1000 charge and discharge cycles can make the battery pack have a service life of one year, thus meeting the use needs of the garden team.

[0225] In some embodiments, assuming that the time required for a single handheld battery pack to be charged from an empty state to a fully charged state is t1, and the time required for a single handheld battery pack to be discharged from a fully charged state to an empty state is t2, then t1≤t2. In this way, the user can use the handheld battery pack uninterruptedly, thereby improving work efficiency. Further, assuming that the waiting time for a single handheld battery pack to enter a discharge state after charging is t3, and the waiting time for a single handheld battery pack to enter a charging state after discharging is t4. Then t1+t3+t4≤t2. It should be noted that if the temperature of the handheld battery pack is too high after charging is completed, it may be necessary to wait for the temperature of the handheld battery pack 210 to drop before starting the discharge process of the handheld battery pack, so there will be a waiting time t3. If the temperature of the handheld battery pack is too high after discharging is completed, it may be necessary to wait for the temperature of the handheld battery pack to drop before starting the charging process of the handheld battery pack, so there will be a waiting time t4. In addition, if a perfect thermal management system is adopted during the charging process, t3 can be 0, that is, the user does not need to wait, and the handheld battery pack can be discharged directly after charging is completed. If a perfect thermal management system is adopted during the discharge process, t4 can be 0, that is, the user does not need to wait, and the handheld battery pack can be charged directly after the discharge is completed.

[0226] In order to minimize the charging waiting time t3, in some embodiments, when the handheld battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 14°C; and / or when the handheld battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 19°C; when the handheld battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the handheld battery pack does not exceed 24°C.

[0227] Normally, the temperature rise characteristics of a battery pack are determined by the following factors. On the one hand, internal resistance is one of the important factors that affect the temperature rise characteristics of a battery pack. In one embodiment, the internal resistance of a single cell in a handheld battery pack is less than or equal to 3mΩ. Optionally, the internal resistance of a single cell in a handheld battery pack ranges from 1.8mΩ to 3mΩ, such as 1.9mΩ, 2mΩ, 2.2mΩ, and 2.6mΩ. Since the internal resistance of a single cell in a handheld battery pack is small, the temperature rise of the single cell is small, and the temperature rise of the entire handheld battery pack after packaging is also small.

[0228] Secondly, the specific structure of the single cell will also affect the temperature rise characteristics of the battery pack. In one embodiment, the single cell in the handheld battery pack is configured as a sheet cell. The sheet design can increase the heat dissipation area of ​​the single cell and prevent the internal temperature of the single cell from rising during charging and discharging.

[0229] Thirdly, the thermal management device installed inside the battery pack will also have a certain impact on the temperature rise characteristics of the battery pack. The thermal management device can adjust the temperature of the battery pack so that the battery pack can work normally at higher or lower ambient temperatures. For example, the thermal management device may include a heating device and / or a heat dissipation device. The heating device can heat the battery pack at a lower ambient temperature to prevent the battery pack from being unable to start charging and discharging due to the low temperature, thereby enabling the battery pack to start charging and discharging immediately in cold weather. The heat dissipation device can prevent the battery pack from overheating to a certain extent, allowing the battery pack to start charging and discharging even in a high temperature environment.

[0230] During high-rate charging, due to the large charging current of the handheld battery pack, if the temperature of the handheld battery pack during the charging process is not controlled, the temperature of the handheld battery pack may be high. The high temperature of the handheld battery pack will cause the following problems. First, during the charging process, if the temperature of the handheld battery pack exceeds the preset temperature threshold, the DC charging device may enter the charging protection state. Once the charging protection state is entered, the charging process of the handheld battery pack will be forced to stop. Second, as mentioned above, if the temperature of the handheld battery pack is high after charging is completed, it may be necessary to wait for the temperature of the handheld battery pack to drop before starting the discharge process of the handheld battery pack. In addition, in a working scenario with a lower temperature (such as outdoors in cold weather), the handheld battery pack may be too cold, resulting in the inability of the handheld battery pack to start charging or discharging immediately. All of the above problems may cause interruptions in the charging of the DC charging device.

[0231] The handheld battery pack in the above-mentioned embodiment can overcome the defect of the prior art that the battery pack temperature rises greatly due to the large current charging and discharging. The temperature change of the battery pack after large current charging and large current discharging is small, so the battery pack can be discharged directly after being fully charged without waiting for cooling, and can be charged directly after the discharge is completed without waiting for cooling. Therefore, the waiting time of the power tool is short, which can further improve the working efficiency of the power tool. In addition, since the charging time of the handheld battery pack is short, a limited number of handheld battery packs can be used for alternating charging to power the power tool system, thereby reducing the use cost of the power tool system.

[0232] In order to make the whole working system light and portable, in some embodiments, the weight range of a single handheld battery pack is set to 1-3.5Kg. Optionally, the weight of a single handheld battery pack 210 is set to 1.5-3Kg, such as 1.5Kg, 2Kg, 3Kg or others.

[0233] As mentioned above, the working system needs to meet the requirements of lightweight and portable use. At the same time, the backpack battery pack in the working system needs to meet the characteristics of an energy storage pack, and the handheld battery pack needs to be able to be quickly recycled. Therefore, in some embodiments, the rated power to weight ratio of the backpack battery pack is in the range of 60-300Wh / Kg, and the maximum allowable charging rate of the handheld battery pack is not less than 7C. In this way, the backpack battery pack is light in weight and has sufficient power, so that it is both lightweight and can fully charge the handheld battery pack, and the charging rate of the handheld battery pack can support fast charging, thereby meeting the needs of fast recycling. Optionally, the rated power to weight ratio of a single backpack battery pack is set to 80-200Wh / Kg, for example, 80Wh / Kg, 100Wh / Kg, 200Wh / Kg or others; Optionally, the maximum allowable charging rate of the single cell in the handheld battery pack is set to 7-12C, such as 7C, 10C, 12C or others.

[0234] Further, in some embodiments, the discharge rate of the backpack battery pack is greater than or equal to 2C. Optionally, the discharge rate of the backpack battery pack is set to 4-10C, such as 4C, 5C, 10C or others. This enables the backpack battery pack to support large current discharge and meet the needs of charging the handheld battery pack as an energy storage pack. In some embodiments, the maximum allowable discharge power of the backpack battery pack is not less than the maximum allowable charging power of the handheld battery pack, so that the handheld battery pack can be quickly charged and thus meet the recycling requirements. It should be noted that in some embodiments, in order to minimize the charging waiting time t3, when the handheld battery pack is charged at a 3C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 14°C; and / or when the handheld battery pack is charged at a 5C rate, when the ambient temperature is about 20°C, the temperature rise of the handheld battery pack does not exceed 19°C; when the handheld battery pack is charged at a 10C rate, when the ambient temperature is about 25°C, the temperature rise of the handheld battery pack does not exceed 24°C. In some embodiments, the internal resistance of a single cell in the handheld battery pack is less than or equal to 3 mΩ. Optionally, the internal resistance of a single cell in the handheld battery pack ranges from 1.8 mΩ to 3 mΩ, such as 1.9 mΩ, 2 mΩ, 2.2 mΩ, or 2.6 mΩ.

[0235] In order to better meet the demand of a backpack battery pack to fully charge a handheld battery pack, the rated capacity of the backpack battery pack needs to be greater than the rated capacity of the handheld battery pack. The rated capacity of the backpack battery pack is defined as the first capacity, and the rated capacity of the handheld battery pack is defined as the second capacity. Optionally, the ratio of the first capacity to the second capacity is greater than or equal to 2. In this way, a backpack battery pack can also fully charge at least two handheld battery packs, which can effectively alleviate the user's power anxiety. Furthermore, the ratio of the first capacity to the second capacity is in the range of 3-15. Since the amount of electricity stored in a backpack battery pack is much greater than that stored in a handheld battery pack, multiple handheld battery packs can be replenished with electricity by carrying a backpack battery pack. Optionally, the ratio of the first capacity to the second capacity is 3, 4, 5, 7, 10, 12 or other.

[0236] It should be noted that “the first power level and the second power level” also refer to the ratio of the power level of a single backpack battery pack to the power level of a single handheld battery pack.

[0237] In order to better meet the need of the backpack battery pack to fully charge the handheld battery pack, the rated capacity of the backpack battery pack also needs to be greater than the rated capacity of the handheld battery pack. The rated capacity of the backpack battery pack is defined as the first capacity; the rated capacity of the handheld battery pack is defined as the second capacity, and the first capacity is greater than the second capacity.

[0238] Further, the ratio of the first capacity to the second capacity is in the range of 3 to 15. Optionally, the ratio of the first capacity to the second capacity is 3, 4, 5, 7, 10, 12, etc. By setting it in this way, a backpack battery pack can fully charge multiple handheld battery packs, which can effectively alleviate the user's anxiety about power consumption.

[0239] It should be noted that the “ratio of the first capacity to the second capacity” refers to the ratio of the rated capacity of a single backpack battery pack to the rated capacity of a single handheld battery pack.

[0240] When the first capacity and the second capacity are too large, the volume and weight of the backpack battery pack and the handheld battery pack will increase accordingly, making them inconvenient to carry and use. When the first capacity and the second capacity are too small, they cannot meet the power demand of the garden team for a day's work. Optionally, the first capacity ranges from 11-30AH, and / or the second capacity ranges from 2-8AH.

[0241] In some embodiments, the weight of the backpack battery pack is also greater than the weight of the handheld battery pack. Figure 4 As shown, the backpack battery pack can be installed on the second type of power tool to power it, and the user does not need to directly bear the weight of the backpack battery pack 200. Fig.12As shown, the handheld battery pack can be installed on the first type of power tool to power it. Of course, as mentioned above, the backpack battery pack can also be connected to a backpack device to power the power tool. In this way, the user can carry the backpack battery pack on his back for easy use. In order to facilitate the work team to carry, carry and use the backpack battery pack and the handheld battery pack, in one embodiment, the weight range of a single backpack battery pack is 4-12KG, and / or the weight range of a single handheld battery pack is 1-3.5KG.

[0242] In some embodiments, the weight ratio of a single backpack battery pack to a single handheld battery pack is greater than 1. Furthermore, in order to prevent the DC charging device from tipping over when the backpack battery pack and the handheld battery pack are installed on the DC charging device, the weight ratio of a single backpack battery pack to a single handheld battery pack is greater than or equal to 2 and less than or equal to 8.

[0243] Similarly, since the first capacity is greater than the second capacity, the volume of the backpack battery pack is also greater than the volume of the handheld battery pack. In order to avoid the impact of excessive volume on the floor space, in some embodiments, the volume range of a single backpack battery pack is 3-20L, and / or the volume range of the handheld battery pack 210 is 0.5-3L. Optionally, the volume ratio of the backpack battery pack to the handheld battery pack is greater than 1. Furthermore, the volume ratio of the backpack battery pack to the handheld battery pack is greater than or equal to 2 and less than or equal to 10.

[0244] As mentioned above, users need to select a backpack battery pack with large capacity and light weight to meet the working requirements as an energy storage pack, which puts high demands on the energy density of the backpack battery pack, while the energy density of the handheld battery pack is relatively low. Among them, the energy density of the battery pack refers to the amount of electricity stored in the battery pack per unit mass / volume. In this application, the amount of electricity stored in the unit mass of the battery pack is defined as the ratio of the rated power to the weight, and the amount of electricity stored in the unit volume of the battery pack is defined as the ratio of the rated power to the volume. In some embodiments, the rated power to weight ratio of the backpack battery pack is greater than the rated power to weight ratio of the handheld battery pack. Optionally, the range of the rated power to weight ratio of the backpack battery pack is 60-300Wh / Kg, and / or the range of the rated power to weight ratio of the handheld battery pack is 60-300Wh / Kg. The backpack battery pack has a rated capacity to volume ratio in the range of 40-220Wh / L, and / or the handheld battery pack has a rated capacity to volume ratio in the range of 60-220Wh / L.

[0245] Since the handheld battery pack needs to meet the working requirements of recycling, in some embodiments, the maximum allowable charging rate of the handheld battery pack is greater than the maximum allowable charging rate of the backpack battery pack.

[0246] Similarly, in order to meet the working requirements of cyclic use, the charging waiting time of the handheld battery pack also needs to be shorter than that of the backpack battery pack. Therefore, in some embodiments, under the same charging rate condition, the temperature rise of the handheld battery pack is less than the temperature rise of the backpack battery pack.

[0247] Since internal resistance is one of the important factors affecting the temperature rise characteristics of a battery pack, in some embodiments, the internal resistance of a single cell in a handheld battery pack is smaller than the internal resistance of a single cell in a backpack battery pack.

[0248] In some embodiments, the single cells in the backpack battery pack are different from the single cells in the handheld battery pack. Those skilled in the art can select the single cells in the backpack battery pack and the single cells in the handheld battery pack as needed. For example, the single cells in the backpack battery pack and the single cells in the handheld battery pack are both soft-pack cells; or, the single cells in the backpack battery pack are soft-pack cells, and the single cells in the handheld battery pack are cylindrical cells; or, the single cells in the backpack battery pack and the single cells in the handheld battery pack are both cylindrical cells, and this application does not limit this.

[0249] In actual working scenarios, backpack battery packs are more often used as energy storage packs to power handheld battery packs. Users rarely need to directly bear the weight of backpack battery packs. Therefore, compared with handheld battery packs, backpack battery packs have relatively lower weight requirements. Therefore, taking backpack battery pack 200' as an example of charging handheld battery pack 210, the single cells in backpack battery pack 200' use relatively heavy 21700 cylindrical cells, and the single cells in handheld battery pack 210 use relatively light soft-pack cells, thereby reducing the cost of the single cells.

[0250] As mentioned above, compared with backpack battery packs, handheld battery packs are lighter and cheaper, so gardening teams are more willing to use handheld battery packs as energy sources for power tools. In order to ensure that the handheld battery pack can be continuously charged to meet the requirements of longer working hours, the working system 1 also provides an energy supply system, which includes a DC charging device for converting the power of the backpack battery pack to the handheld battery pack to continuously meet the power requirements of the handheld battery pack.

[0251] The DC charging device includes at least one input interface and at least one output interface, wherein the input interface is configured to detachably mount a backpack battery pack, and the output interface is used to removably connect to a handheld battery pack. The DC charging device also includes at least one DC charging module, which is configured to convert the electrical energy of the backpack battery pack and transmit it to the handheld battery pack, so that the backpack battery pack charges the handheld battery pack.

[0252] In some embodiments, please refer to Figure 17 to Figure 18 The DC charging device 300 includes a housing 301, and the DC charging device 300 has a length direction a, a width direction b, and a height direction c. Specifically, the housing 301 extends longitudinally along the height direction c.

[0253] In order to facilitate the user to carry, a gripping portion 302 is provided on the housing 301. Optionally, the gripping portion 302 is configured as a handle. Further, the gripping portion 302 is pivotally connected to the housing 301, and the gripping portion 302 can be flipped upwards to be held upright by the user, or flipped downwards to be stored on the housing 301.

[0254] The DC charging device 300 includes an input interface 310 and an output interface 320, and the input interface 310 and the output interface 320 are arranged opposite to each other along a width direction perpendicular to the height direction c. The input interface 310 and the output interface 320 are arranged opposite to each other, which can reasonably utilize the space of the DC charging device 300, and is also conducive to the DC charging device 300 to maintain balance and not easily tip over.

[0255] In this embodiment, the number of input interfaces and output interfaces is 1. In other embodiments, the number of input interfaces and output interfaces may be other, such as 2, 3, 4, 6, etc., which is not specifically limited here and is determined according to actual conditions.

[0256] The number of input interfaces and output interfaces can be the same or different. For example, if the number of input interfaces is 1 and the number of output interfaces is 2, the input interface is set on one side of the DC charging device, and the two output interfaces are set on the other side of the DC charging device. In this way, the backpack battery pack can charge two handheld battery packs, and the charging method can be simultaneous charging or sequential charging.

[0257] Taking the installation of the backpack battery pack 200 and the handheld battery pack 210 on the DC charging device 300 as an example, the input interface 310 includes a pair of first connecting parts 311 extending along the first sliding direction, which are used to connect with a pair of first matching parts 201a, 201b, and are used to guide the backpack battery pack 200 to slide and install or detach from the DC charging device 300 along the first sliding direction. The output interface 320 includes a pair of second connecting parts 321 extending along the second sliding direction, which are used to connect with a pair of second matching parts 211a, 211b, and are used to guide the handheld battery pack 210 and the DC charging device 300 to slide and install or detach along the second sliding direction. The structure of the input interface and the output interface can be the same or different. In this embodiment, the first sliding direction and the second sliding direction are parallel to each other, and are both parallel to the height direction c, and the size of the first connecting part 311 along the height direction c is greater than the size of the second connecting part 321 along the height direction c.

[0258] In this embodiment, the input interface 310 is substantially the same as the aforementioned first tool interface 111, and the output interface 320 is substantially the same as the aforementioned second tool interface 141. That is, the pair of first connection parts 311 is configured as a pair of outer slide rails, and the pair of second connection parts 321 is configured as a pair of inner slide rails.

[0259] Of course, it is easy for a person skilled in the art to think that the first connection part and the second connection part can also be arranged in other forms, and the present application does not limit this, as long as the input interface and the backpack battery pack interface, and the output interface and the handheld battery pack interface can be matched and connected with each other.

[0260] In this embodiment, the plugging and unplugging direction of the backpack battery pack 200 and the DC charging device 300 is parallel to the plugging and unplugging direction of the handheld battery pack 210 and the DC charging device 300. The plugging and unplugging direction refers to the installation direction of the battery pack to the DC charging device and the direction in which the battery pack is removed from the DC charging device. Specifically, the plugging and unplugging direction is parallel to the height direction c. The backpack battery pack 200 is connected along the pair of first connecting portions 311 from top to bottom in the height direction (such as Fig.19 The backpack battery pack 200 can be mounted on the DC charging device 300 by sliding along the pair of second connecting parts 321 from top to bottom in the height direction. The backpack battery pack 200 can be mounted on the DC charging device 300 by sliding along the pair of first connecting parts 311 from bottom to top in the height direction (as shown in the c1 direction). Fig.19 The backpack battery pack 200 can be detached from the DC charging device 300 by sliding in the direction c2 as shown; the handheld battery pack 210 can be detached from the DC charging device 300 by sliding from bottom to top along a pair of second connecting parts 321 in the height direction.

[0261] For further information, please refer to Fig.17 The input interface 310 also includes a plurality of first charging electrodes, which are located between a pair of first connecting portions 311, including a first positive electrode 321, a first negative electrode 322, a first analog signal communication electrode 323, a first digital signal communication electrode 324, and a second digital signal communication electrode 325. The input interface 310 has two digital communication modes and can communicate with two different types of battery packs. In this embodiment, the communication type of the first digital signal communication electrode 324 is serial communication, and the communication type of the second digital signal communication electrode 325 is differential communication. In detail, the differential communication can be CAN (Control Area Network, local area communication network) communication.

[0262] Correspondingly, the backpack battery pack electrode (not shown) includes a first positive contact, a first negative contact, a first digital signal communication contact, and a second digital signal communication contact. In this embodiment, the communication type of the first digital signal communication contact is serial communication, and the communication type of the second digital signal communication contact is differential communication. In detail, the differential communication can be CAN communication.

[0263] Please refer to Fig.18 The output interface 320 also includes a plurality of second charging electrodes, which are located between a pair of second connecting portions 321, including a second positive electrode 331, a second negative electrode 332, a second analog signal communication electrode 333, a third digital signal communication electrode 334, and a fourth digital signal communication electrode 335. The output interface 320 has two digital communication modes and can communicate with two different types of battery packs. In this embodiment, the communication type of the third digital signal communication electrode 334 is serial communication, and the communication type of the fourth digital signal communication electrode 335 is differential communication. In detail, the differential communication can be CAN (Control Area Network, local area communication network) communication.

[0264] Correspondingly, the handheld battery pack electrode (not shown) includes a second positive contact, a second negative contact, a third digital signal communication contact, and a fourth digital signal communication contact. In this embodiment, the communication type of the third digital signal communication contact is serial communication, and the communication type of the fourth digital signal communication contact is differential communication. In detail, the differential communication can be CAN communication.

[0265] Specifically, when the backpack battery pack 200 is installed on the DC charging device 300, the first positive pole piece 321, the first negative pole piece 322, the first analog signal communication pole piece 323, the first digital signal communication pole piece 324 and the second digital signal communication pole piece 325 are respectively plugged into the first positive contact, the first negative contact, the first digital signal communication contact and the second digital signal communication contact. The DC charging device 300 first activates the backpack battery pack 200 through the first analog signal communication pole piece 323, and then communicates digital signals with the backpack battery pack 200 through the second digital signal communication pole piece 325. When the communication is successful, the DC charging device 300 recognizes that the backpack battery pack 200 is a direct plug-in connection.

[0266] Similarly, when the handheld battery pack 210 is installed on the DC charging device 300, the second positive electrode plate 331, the second negative electrode plate 332, the second analog signal communication electrode plate 333, the third digital signal communication electrode plate 334 and the fourth digital signal communication electrode plate 335 are respectively plugged into the second positive contact, the second negative contact, the third digital signal communication contact and the fourth digital signal communication contact. The DC charging device 300 first activates the handheld battery pack 210 through the second analog signal communication electrode plate 333, and then communicates digital signals with the handheld battery pack 210 through the fourth digital signal communication electrode plate 335. When the communication is successful, the DC charging device 300 recognizes that the handheld battery pack 210 is a direct plug-in connection.

[0267] Please refer to Figure 7 and Fig.17 The input interface 310 further includes a first locking member 312 located between a pair of first connecting portions 311. When the backpack battery pack 200 is installed on the DC charging device 300, the first locking member 312 is used to cooperate with the first locking portion 250 of the backpack battery pack, thereby achieving connection and locking between the backpack battery pack 200 and the DC charging device 300. Please refer to Fig.10 and Fig.18 The output interface 320 further includes a second locking member 322 located between the second connection portions 321. When the handheld battery pack 210 is mounted on the DC charging device 300, the second locking member 322 is used to cooperate with the second locking portion 260 of the handheld battery pack, thereby achieving connection and locking between the handheld battery pack 200 and the DC charging device 300. In this embodiment, the first locking member 312 and the second locking member 322 are configured as buckles, and the first locking portion 250 and the second locking portion 260 are configured as slots that can cooperate with the buckle.

[0268] Furthermore, the DC charging device 300 also includes a first trigger member 313, which can drive the first locking member 312 to move from a locked position to an unlocked position. When the first locking member 312 is in the locked position, the first locking member 312 cooperates with the first locking portion 250 to lock the DC charging device 300 and the backpack battery pack 200; when the first locking member 312 is in the unlocked position, the first locking member 312 disengages from the first locking portion 250, and the DC charging device 300 and the backpack battery pack 200 are unlocked. The DC charging device 300 further includes a second trigger 323, which can drive the second locking member 322 to move from a locked position to an unlocked position. When the second locking member 322 is in the locked position, the second locking member 322 cooperates with the second locking portion 260 to lock the DC charging device 300 and the handheld battery pack 210. When the second locking member 322 is in the unlocked position, the second locking member 322 disengages from the second locking portion 260, and the DC charging device 300 and the handheld battery pack 210 are unlocked. Optionally, the first trigger 313 and the second trigger 323 are configured as buttons, and are movably connected to the housing 301.

[0269] It should be pointed out that the first locking member 312, the second locking member 322, the first locking portion 250 and the second locking portion 260 can also be arranged in other forms. For example, the first locking member 312 and the second locking member 322 are arranged as a card slot, and the first locking portion 250 and the second locking portion 260 are arranged as a buckle that cooperates with the card slot. The present application does not impose any restrictions on this.

[0270] In other embodiments, since all backpack battery packs in the battery pack system 20 have interfaces of the same structure, and all handheld battery packs also have interfaces of the same structure, the backpack battery packs and handheld battery packs may also be battery packs of other forms, such as Fig. 20 As shown, the input interface can be installed with a backpack battery pack 200 ′, and the output interface can be installed with a handheld battery pack 210 . By using the DC charging device 300 , the backpack battery pack 200 ′ can also be used to supplement the power of the handheld battery pack 210 .

[0271] The DC charging module 350 is configured to receive the electric energy of the input interface 310, convert it and transmit it to the output interface 320, so that the backpack battery pack can charge the handheld battery pack. Optionally, the DC charging module 350 is disposed in the housing 301. Fig.21, the DC charging module 350 is electrically connected to the input interface 310 and the output interface 320. Specifically, the charging module 350 is electrically connected to the first charging electrode and the second charging electrode. It can be understood that the DC charging module 350 is a DCDC (Direct Current-Direct Current) module. When the backpack battery pack 200 is installed on the input interface 310 and the handheld battery pack 210 is installed on the output interface 320, the DC charging module 350 is used to convert the DC power stored in the backpack battery pack 200 into DC power for charging the handheld battery pack 210. Generally, the DC charging module 350 is used to perform voltage conversion to convert the received voltage of the backpack battery pack 200 into an output voltage compatible with the handheld battery pack 210.

[0272] When the garden team goes out to work during the day and AC power is not available, they can directly use the existing backpack battery packs in the battery pack system. By carrying a large-capacity backpack battery pack and using a DC charging device to charge the handheld battery pack, the garden team's power anxiety problem when they go out to work is solved.

[0273] In order to carry as much light equipment as possible while meeting the power demand, as an implementation method, take a two-person gardening team consisting of worker A and worker B as an example. The gardening team carries a backpack battery pack, two handheld battery packs and a DC charging device that are fully charged by an AC power source the night before. After arriving at the workplace, worker A and worker B use a handheld battery pack to install the corresponding power tools (such as a handheld hair dryer, lawn mower or pruning machine, etc.) to work. When any handheld battery pack is low on power, it can be installed on the DC charging device and charged with a backpack battery pack. After it is fully charged, it can continue to be used to meet the needs of continuous work. In this way, even in the scenario where there is no AC power socket at the workplace, the power supply problem of the power tool system can still be effectively solved.

[0274] It should be pointed out that in order to meet more diverse work scenarios and longer work needs, the garden team can also carry multiple backpack battery packs. Since the backpack battery packs can power both power tools and handheld battery packs, the garden team can use some backpack battery packs as energy storage packs to power handheld battery packs, and use other backpack battery packs as tool packs to power power tools to meet work needs in different usage scenarios.

[0275] As a reference implementation method, let's take a two-person gardening team consisting of worker A and worker B as an example. The gardening team carries two backpack battery packs, three handheld battery packs and a DC charging device that are fully charged by an AC power source the night before. After arriving at the work site, worker A first installs the backpack battery pack on the automatic lawn mower to let it mow the grass automatically, and then uses a handheld battery pack to install it on the lawn mower to mow the grass. Worker B uses a handheld battery pack to install it on the pruning machine to prune. When the two handheld battery packs are low on power, one of the handheld battery packs can be installed on the DC charging device and charged with a spare backpack battery pack. After it is fully charged, it can continue to be used, and the other spare handheld battery pack can be used to replace the low-power battery pack to meet the needs of continuous work.

[0276] As mentioned above, garden teams usually visit many work locations during a day's work, so the weight of the entire work system should not be too heavy, otherwise it will be inconvenient for the garden team to frequently carry and transport the system during their work.

[0277] In some embodiments, the battery pack system includes a backpack battery pack and two handheld battery packs, the energy supply system includes a DC charging device, and the weight range of the power supply system is 16-31Kg. In some embodiments, the battery pack system includes two backpack battery packs and two handheld battery packs, the energy supply system includes a DC charging device, and the weight range of the power supply system is 20-43Kg. In some embodiments, the battery pack system includes a backpack battery pack and a handheld battery pack, the energy supply system includes a DC charging device, and the weight range of the power supply system is 15-27.5Kg. As an example, the battery pack system includes a backpack battery pack and two handheld battery packs, the energy supply system includes a DC charging device, and the weight of the power supply system is 24Kg. Among them, the weight of the backpack battery pack is 8Kg, the weight of the handheld battery pack is 2Kg, and the weight of the DC charging device 300 is 12Kg.

[0278] On the one hand, since the garden team usually works outdoors, it is difficult to find an AC power source; on the other hand, if the AC power source is to be used to power the backpack battery pack and / or the handheld battery pack, a power conversion module that converts AC power into DC power (Alternating Current-Direct Current, AC to DC) must be set in the DC charging device, so the weight and volume of the DC charging device will inevitably increase a lot, and the working system cannot be compact and light, which is not conducive to the work of the garden team. In one embodiment, the DC charging device is only provided with an input interface for receiving power input. In other words, the DC charging device is not provided with an AC input interface and / or other DC input interfaces.

[0279] Since the rated power of a handheld battery pack is smaller than that of a backpack battery pack, there is usually no need for a handheld battery pack to recharge a backpack battery pack in actual work. Therefore, in order to save costs and simplify the charging logic, in one embodiment, the input interface is configured to only receive power input from the backpack battery pack, and not output power to the outside; the output interface is configured to only output power to the handheld battery pack, and not receive external power input.

[0280] In order to enable the garden team to work continuously, the backpack battery pack needs to charge the handheld battery pack from an empty state to a fully charged state in a relatively short time.

[0281] However, traditional battery packs generally charge slowly. The reason why the battery pack charges slowly is that, on the one hand, the performance of the single cell itself (such as the charging rate) is poor, and on the other hand, it is limited by the low charging power that the charger that charges the battery pack can provide. Currently, chargers on the market generally need to draw power from a mains socket. However, for safety reasons, the power that a mains socket can provide is usually limited. For example, the power of mains sockets in North America is generally limited to 1.8KW, and the power of mains sockets in Europe is generally limited to 3.6KW. Due to the power limitation of the mains socket, chargers on the market cannot charge the battery pack at high power. Once the power of a large-capacity battery pack is exhausted, it is usually necessary to charge the battery pack for a long time (much longer than the battery life that the battery pack can provide).

[0282] Therefore, it is necessary to improve the charging speed of the battery pack by increasing the charging rate of the battery pack and increasing the charging power of the charging equipment.

[0283] In some embodiments, a first charging rate when the backpack battery pack charges the handheld battery pack is greater than or equal to a second charging rate when the AC power charges the handheld battery pack, and the ratio of the first charging rate to the second charging rate is greater than or equal to 1 and less than or equal to 3.

[0284] The first charging ratio of the backpack battery pack to the handheld battery pack is the ratio of the maximum output power of the backpack battery pack to the handheld battery pack and the rated power of the handheld battery pack, and the second charging ratio of the AC power to the handheld battery pack is the ratio of the maximum output power of the AC power to the rated power of the handheld battery pack. When a traditional charger charges a handheld battery pack, the input power source is usually AC power. Due to the power limit of the AC power, the charging speed of the handheld battery pack is relatively slow. The backpack battery pack provided in this embodiment uses a DC energy storage module to charge the handheld battery pack, which can increase the charging power of the handheld battery pack, thereby increasing the charging speed.

[0285] Specifically, the charging power provided by the backpack battery pack can make the first charging rate greater than or equal to 2C. Optionally, the first charging rate is 3C, 4C, 5C, 7C, 10C or 12C. The charging power provided by the mains can only support the second charging rate of the handheld battery pack 210 between 1C and 2C. Therefore, the speed of charging the handheld battery pack with the backpack battery pack is much faster than the speed of charging the handheld battery pack with the mains.

[0286] When the first charging rate is set to 3C, the handheld battery pack can be charged from an empty state to a fully charged state in about 20 minutes. When the first charging rate is set to 5C, the handheld battery pack can be charged from an empty state to a fully charged state in about 12 minutes.

[0287] Accordingly, for the same battery pack, the first charging time required for the backpack battery pack to charge the handheld battery pack from an empty state to a fully charged state is shorter than the second charging time required for the AC power supply to charge the handheld battery pack from an empty state to a fully charged state.

[0288] In some embodiments, the maximum output power of the backpack battery pack is greater than or equal to the maximum output power of the AC power supply. The ratio of the maximum output power of the backpack battery pack to the maximum output power of the AC power supply is greater than 1 and less than or equal to 3. Optionally, the ratio of the maximum output power of the backpack battery pack to the maximum output power of the AC power supply can be 2 or 3. The maximum output power of the backpack battery pack 200 is greater than or equal to 1.8Kw; optionally, the maximum output power of the backpack battery pack is greater than or equal to 3Kw. For example, the maximum output power of the backpack battery pack is 3.6Kw, 4Kw, 5Kw, 6Kw, 7Kw, 10Kw, 12Kw or others. The output power of the AC power supply is less than 1.8KW.

[0289] By using a backpack battery pack to charge a handheld battery pack, the problem of limited charging power and slow charging speed caused by traditional chargers obtaining AC power from the socket can be solved. The output power of the backpack battery pack is greater than the output power of the AC power. Therefore, when the backpack battery pack is used to charge the handheld battery pack, its charging speed is also greater than the charging speed of the AC power to charge the handheld battery pack.

[0290] In some embodiments, the DC charging device also includes a heating device (not shown) and / or a heat dissipation device for performing temperature control on a backpack battery pack and a handheld battery pack during the charging and discharging process, so that the backpack battery pack can be continuously discharged and the handheld battery pack can be continuously charged, and also ensures that the handheld battery pack can immediately start discharging the power tool after charging is completed.

[0291] Please refer to Fig.17 , Fig.18The heat dissipation device of the DC charging device 300 includes an air inlet and an air outlet. Specifically, two air inlets are provided, including a first air inlet 380a and a second air inlet 380b. The first air inlet 380a and the second air inlet 380b are both provided on the housing 301. In the length direction a, the first air inlet 380a is located between a pair of first connecting portions 311, and the second air inlet 380b is located between a pair of second connecting portions 321.

[0292] See also Fig. 22 and Fig.23 ,in Fig. 22 The figure is the internal structure diagram of the DC charging device 300 after the shell 301 is removed. A first air duct 381 corresponding to the input interface 310 is arranged in the upper space away from the bottom inside the DC charging device 300. A second air duct 382 corresponding to the output interface 320 is also arranged in the upper space away from the bottom inside the DC charging device 300. The first air duct 381 and the second air duct 382b are arranged opposite to each other, the air inlet 381a of the first air duct 381 is connected to the first air inlet 380a, the air inlet 382a of the second air duct 382 is connected to the second air inlet 380b, and the air outlet 381b of the first air duct 381 and the air outlet 382b of the second air duct 382 are both located on the side of the shell 301 in the length direction a, and are both connected to the air outlet 301a arranged on the side of the shell 301 in the length direction a.

[0293] The first air duct 381 is provided with a first fan (not shown in the figure), which is located inside the housing of the first air duct 381 and corresponds to the position of the air inlet 381a of the first air duct 381. The second air duct 382 is provided with a second fan 384, which is arranged outside the housing of the second air duct 382 and located between the air inlet 382a and the air outlet 382b of the second air duct 382.

[0294] Taking the backpack battery pack 200 charging the handheld battery pack 210 through the DC charging device 300 as an example, when the backpack battery pack 200 and the handheld battery pack 210 are both installed on the DC charging device 300, as shown in FIG. Figure 7 and Fig.10As shown, the backpack battery pack 200 is provided with an air inlet (not shown) and an air outlet 270, and the handheld battery pack 210 is provided with an air inlet (not shown) and an air outlet 280. The first air inlet 380a is connected to the air outlet 270, and the second air outlet 380b is connected to the air outlet 280. When the backpack battery pack 200 needs to be cooled, the first fan is started, and the air flows into the backpack battery pack 200 from the air inlet provided on the backpack battery pack 200, cools the battery cells contained in the backpack battery pack 200, and then flows out from the air outlet 270 provided on the backpack battery pack 200, and then flows into the air inlet 381a through the first air inlet 380 connected with the air outlet 270, passes through the shell of the first air duct 381, flows out of the first air duct 381 from the air outlet 381b, and flows out of the shell 301 from the air outlet 301a connected with the air outlet 381b. When the handheld battery pack 210 needs to be cooled, the second fan 382 is started, and air flows into the handheld battery pack 210 from the air inlet (not shown) provided on the handheld battery pack 200, and after cooling the battery cells contained in the handheld battery pack 210, flows out from the air outlet 280 provided on the handheld battery pack 210, and then flows into the air inlet 382a through the second air inlet 380b connected to the air outlet 280, passes through the shell of the second air duct 382, ​​flows out of the second air duct 382 from the air outlet 382b, and flows out of the shell 301 from the air outlet 301a connected to the air outlet 382b.

[0295] The first air duct and the second air duct are arranged in the DC charging device so that the airflows for cooling the backpack battery pack and the handheld battery pack will not mix, thereby preventing the cold and hot airflows from intersecting and achieving a better cooling effect.

[0296] When the DC charging device 300 is working, the electronic devices contained in the shell 301 generate a lot of heat and also need to be cooled. The DC charging device 300 also includes a third air duct 383. The shell of the third air duct 383 contains electronic devices (not shown). The third air duct 383 is arranged below the first air duct 381 and the second air duct 382. The air inlet (not shown) of the third air duct 383 is connected to the air inlet 301a provided on one side of the shell 301 in the length direction a. The air outlet 383b of the third air duct 383 is connected to the air outlet 301b provided on the other side of the shell 301 in the length direction a. Fig.21 and Fig. 22 It can be seen that the first air duct 381, the second air duct 382 and the third air duct 383 all discharge air from the same side.

[0297] The third air duct 383 can be provided with multiple fans. In this example, the third air duct 383 is provided with three fans, namely the third fan 385, the fourth fan 386 and the fifth fan (not shown in the figure). The third fan 385 and the fourth fan 386 are arranged on the same side, both located at the air outlet 383b of the third air duct 383. The fifth fan is arranged inside the third air duct 383. The outer contours of the third fan 385, the fourth fan 386 and the fifth fan are all circular, and the central axis of the fan passes through the center of the fan, wherein the central axis of the fifth fan is perpendicular to the central axis of the third fan 385 and the central axis of the fourth fan 386. Although the third air duct is provided with multiple fans, multiple fans do not have to work at the same time when the DC charging device is powered on. Only one or two fans can be turned on, or three fans can be turned on at the same time.

[0298] The DC charging device is provided with a plurality of independent air ducts and fans, so that different battery packs and electronic devices can be cooled separately during charging, so that the cold and hot air flows will not intersect, thereby improving the heat dissipation efficiency.

[0299] When the garden team is not working at night, it is necessary to use an AC power supply to charge the backpack battery pack and the handheld battery pack, so that the garden team can carry fully charged backpack battery packs and handheld battery packs when they go out to work. Therefore, the energy supply system also includes at least one AC charging device, the AC charging device includes at least one charging interface and at least one AC charging module, the charging interface is configured to detachably install the backpack battery pack and / or the handheld battery pack, and the AC charging module is configured to receive the AC power input interface and convert it into DC power and output it to the charging interface to realize charging of the backpack battery pack and / or the handheld battery pack.

[0300] The energy supply system includes not only a DC charging device and an AC charging device, but also allows the work team to carry only the DC charging device during the day, and use the backpack battery pack as an energy storage pack to power the handheld battery pack, so as to achieve long-term work. After returning home at night, the backpack battery pack and / or the handheld battery pack are charged with the AC charging device to meet the power requirements for the next day's work. This arrangement allows the work team to carry and transport the equipment easily without having to carry too many devices during the day.

[0301] In some embodiments, Fig.24 As shown, the energy supply system 30 includes an AC charging device 360, and the AC charging device 360 ​​includes an AC charging module 365 (see Fig. 27 ) and a charging interface 361. In this embodiment, the charging interface 361 includes two charging interfaces 361a and 361b, and the two charging interfaces 361a and 361b are arranged opposite to each other.

[0302] In order to make the AC charging device more universal, the charging interface can be installed with a backpack battery pack and a handheld battery pack. In this embodiment, the charging interfaces 361a and 361b have the same structure, that is, the charging interfaces 361a and 361b both include the structure of the aforementioned first tool interface 111 and the third tool interface 113. In other words, the charging interfaces 361a and 361b both include the structure of the aforementioned input interface 310 and the output interface 320. In other embodiments, the charging interface has the same structure as the input interface 310; and / or, the charging interface has the same structure as the output interface 320, which is not limited in this application.

[0303] When both charging interfaces 361a and 361b of the AC charging device 360 ​​are installed with battery packs (the battery packs may be two backpack battery packs, two handheld battery packs, or one backpack battery pack and one handheld battery pack), the AC charging device 360 ​​obtains the access order and remaining power of the two battery packs, and charges the battery packs according to the plug-in order and the remaining power. Among them, the charging priority of the battery packs by the AC charging device 360 ​​is: the priority of the plug-in order is higher than the priority of the power. That is, the AC charging device 360 ​​first determines the charging order of the battery packs according to the plug-in order, and when the plug-in order is the same, it determines the charging priority order of the battery packs according to the remaining power. Specifically, when the AC charging device 360 ​​charges the battery packs, it first charges the battery pack that is connected first, and then charges the battery pack that is connected later. When two battery packs are plugged into the AC charging device 360 ​​at the same time, that is, the AC charging device 360 ​​is powered on only after the two battery packs are plugged into the AC charging device 360, the AC charging device 360 ​​obtains the remaining power of the two battery packs, and charges the battery pack with the larger remaining power first. After the battery pack with the larger remaining power is fully charged, the battery pack with the smaller remaining power is charged. If the remaining power of the two battery packs is the same, the AC charging device 360 ​​randomly selects one of the battery packs to charge.

[0304] After the AC charging device 360 ​​is connected to the mains, the staff installs the empty battery pack on the AC charging device 360, and the AC charging device 360 ​​charges the battery pack according to the installation order of the battery pack. Optionally, the battery pack that is first inserted into the AC charging device 360 ​​is charged first. Exemplarily, after the AC charging device 360 ​​is powered on, if the battery pack is first installed on the charging interface 361a, the AC charging device 360 ​​first charges the battery pack on the charging interface 361a. When the battery pack on the charging interface 361a is charged, the staff installs the battery pack on the charging interface 361b. After the charger fully charges the battery pack on the charging interface 361a, it will charge the battery pack on the charging interface 361b.

[0305] If battery packs are pre-installed on both charging interfaces 361a and 361b before the AC charging device 360 ​​is connected to the mains, the remaining power of the two battery packs is obtained after the AC charging device 360 ​​is powered on, and the battery pack with the smaller remaining power is charged first. When the remaining power of the two battery packs is the same, the AC charging device 360 ​​randomly selects one of the battery packs for charging.

[0306] Since garden repairs require a large number of backpack battery packs and handheld battery packs, the work team needs to fully charge more battery packs at night. The number of charging interfaces on the AC charging device is limited. In order to meet the demand for charging more battery packs, the energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is used to removably connect to a backpack battery pack and / or a handheld battery pack, and the charging module is used to connect to the charging interface and transmit the electrical energy output by the charging interface to the charging cabinet interface, so as to charge the backpack battery pack and / or the handheld battery pack.

[0307] The energy supply system includes a charging cabinet that can expand the charging interface to meet the charging needs of more battery packs. When the work team returns home at night, they can use the AC charging device and charging cabinet to recharge the low-power battery packs in the battery pack system to meet the work needs of the next day.

[0308] It should be noted that when the charging cabinet is connected to the AC charging device, the charging module receives the DC power output from the AC charging device, converts the DC power into DC power, and then transmits it to the charging cabinet interface. Therefore, the charging module is a power conversion module that converts DC power into DC power (D i rect Cur rent-D i rect Cur rent, DC to DC).

[0309] In some embodiments, Fig.25 As shown, the energy supply system 30 also includes a charging cabinet 370, and the charging cabinet 370 includes a charging cabinet interface 371. The charging cabinet interface 371 includes four, namely 371a, 371b, 371c and 371d, and two charging cabinet interfaces 371a and 371b are arranged opposite to the other two charging cabinet interfaces 371c and 371d. Of course, the charging cabinet interface can also be 6, 8 or other, and this application does not limit this.

[0310] Specifically, the structure of the charging cabinet interface 371 is the same as that of the charging interfaces 361a and 361b. That is, the four charging cabinet interfaces 371a, 371b, 371c and 371d can all be installed with the backpack battery pack 200 and the handheld battery pack 210. In other words, the charging cabinet interfaces 371a, 371b, 371c and 371d all include the structure of the input interface 310 and the output interface 320.

[0311] The charging cabinet 370 further includes a cabinet 377 and a cover 378. The cabinet 377 encloses a storage space for storing a backpack battery pack and / or a handheld battery pack. The cover 378 can be operated to open or close the storage space. The storage space can be closed. The backpack battery pack and / or the handheld battery pack can be protected from water, dust, temperature control, etc. by the charging cabinet 370, thereby improving charging safety. Optionally, the cover 378 is pivotally connected to the cabinet 377.

[0312] In order to achieve power transmission, the energy supply system also includes a connection device, and the charging cabinet is provided with an input interface for receiving the power output by the AC charging device. The connection device is configured to connect the charging interface and the input interface to achieve the transmission of the power output by the charging interface to the charging cabinet. Fig.26 As shown, the energy supply system 30 also includes a connecting device 390 , and the charging cabinet 370 includes an input interface 376 . The connecting device 390 is configured to connect the charging interface 361 a and the input interface 376 to transmit the electric energy output by the charging interface 361 a to the charging cabinet 370 .

[0313] One end of the charging interface 361 a is used to connect to the input interface 376 , and the other end is used to connect to the AC charging module 365 ; one end of the input interface 376 is used to connect to the charging interface 361 a , and the other end is used to connect to the DC charging module 375 .

[0314] Optionally, one end of the connecting device is fixedly connected to the charging cabinet, and the other end is detachably connected to the AC charging device; or, one end of the connecting device is fixedly connected to the AC charging device, and the other end is detachably connected to the charging cabinet; or, one end of the connecting device is detachably connected to the charging cabinet, and the other end is detachably connected to the AC charging device; this application does not impose any restrictions on this.

[0315] In this embodiment, the connection device 390 is detachably connected to the AC charging device 360 ​​and the charging cabinet 370. Specifically, the connection device 390 includes a cable 391 and an adapter 393 connected to one end of the cable 391. The cable 391 is used to connect to the input interface 376, and the adapter 393 is used to connect to the AC charging device 360. Of course, the cable can also be used to connect to the output interface of the AC charging device, and the adapter can also be used to connect to the charging cabinet.

[0316] Furthermore, the adapter 393 includes an adapter interface (not shown) for connecting to the AC charging device 360 ​​or the charging cabinet 370. In this embodiment, the adapter interface 393a is configured to have the same structure as the aforementioned handheld battery pack interface, so the adapter interface 393a can be detachably connected to any charging interface 361a or any charging cabinet interface 361b. Of course, the adapter interface can also be configured to have the same structure as the backpack battery pack interface, or configured to have a cable head structure, and the charging interface interface or charging cabinet interface connected to the adapter interface is configured to have a socket form that matches the cable head, and there is no limitation on this.

[0317] Furthermore, the connecting device 390 also includes a cable head 391a connected to the other end of the cable 391, and the cable head 391a is used to connect to the input interface 376 of the charging cabinet 370. It should be noted that the connection between the cable head and the input interface can be a fixed connection or a detachable connection.

[0318] In some embodiments, Fig. 27 In the circuit structure diagram of the charging cabinet 370 provided, the charging cabinet 370 also includes a first management module 372 arranged in the cabinet body 377. The first management module 372 can establish a communication connection with the AC charging device 360, send the first electrical parameter information of the charging cabinet 370 to the AC charging device 360, and receive the communication information sent by the AC charging device 360.

[0319] Specifically, the charging power of the charging cabinet 370 is provided by the AC charging device 360, so it is necessary to send various parameters of the charging cabinet 370 itself, that is, the first electrical parameter information, to the AC charging device 360, and receive the communication information of the AC charging device 360 ​​including various electrical parameters and control instructions provided by the AC charging device 360, so that the management of the charging cabinet 370 can be achieved based on this information.

[0320] In some embodiments, the first management module 372 is also configured to control at least one of the following items according to the first electrical parameter information of the charging cabinet 370 itself and the communication information sent by the AC charging device 360: parameter collection of the charging cabinet 370, power distribution to each charging cabinet interface 371a, 371b, 371c and 371d, dynamic monitoring of each charging cabinet interface 371a, 371b, 371c and 371d, fault detection feedback and processing.

[0321] Specifically, to ensure the normal operation of the charging cabinet 370, it is necessary to obtain various electrical parameters of the charging cabinet 370 in real time, so as to perform further management and control based on the various electrical parameters. When the charging cabinet 370 receives charging power from the AC charging device 360, it controls the power distribution to each charging cabinet interface 371a, 371b, 371c and 371d according to the preset priority order, and monitors the charging status of each charging cabinet interface 371a, 371b, 371c and 371d in real time; during the entire charging process, the first management module 372 also needs to perform fault detection and fault handling on each module of the charging cabinet 370.

[0322] Optionally, the preset priority order includes at least the order of the positions of the charging cabinet interfaces 371a, 371b, 371c and 371d, the order of insertion of the battery packs, the order of the capacity of the battery packs from high to low or from low to high, the order of the remaining power of the battery packs from high to low or from low to high, the order of the charging time of the battery packs from long to short or from short to long, the order of the charging rate of the battery packs from high to low or from low to high, the order of the temperature of the battery packs from high to low or from low to high, etc., which can be set according to actual needs and are not specifically limited here. In particular, the priority order can also be set by wireless communication and remote control using a mobile device.

[0323] In some embodiments, the charging cabinet 370 also includes a heating module (not shown), and the heating module is at least partially disposed in the cabinet 377. Specifically, the heating module can be disposed on the side and / or bottom of the cabinet 377 to increase the temperature inside the charging cabinet 370. The heating module includes a variety of heating methods, such as directly heating the air, heating the heat sink, etc. It can be understood that when the charging cabinet 370 is working outdoors, or in the cold winter, the extremely low temperature is not suitable for charging the battery pack, and the charging efficiency is extremely low. Therefore, it is necessary to set a heating module in the charging cabinet 370 to cope with the adverse effects of the low temperature environment.

[0324] Further, the charging low temperature lower limit threshold and the charging low temperature upper limit threshold are usually preset, which can be implemented by software or hardware. The hardware method is to use a simple comparator or set the above threshold in a hardware circuit to achieve the above threshold. The software method is to preset the above threshold in the first management module 372 and control whether to heat based on the comparison result between the threshold and the actual temperature. Taking the software method as an example, the charging low temperature lower limit threshold and the charging low temperature upper limit threshold are preset in the first management module 372, wherein the charging low temperature lower limit threshold is the lower limit condition for enabling the heating module, and the charging low temperature upper limit threshold is the upper limit condition for stopping the heating module. That is, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 detected is lower than the charging low temperature lower limit threshold, a heating instruction is generated to the heating module, and the heating module responds to the heating instruction and performs a heating operation; when the first management module 372 determines that the real-time temperature of the charging cabinet 370 detected is higher than the charging low temperature upper limit threshold, a stop heating instruction is generated to the heating module, and the heating module responds to the stop heating instruction and performs a stop heating operation.

[0325] In some embodiments, a heating fan (not shown) used in conjunction with the heating module is also provided in the charging cabinet 370. When the heating module is enabled, the heat sink on the inner side of the bottom of the cabinet 377 can be heated. In order to achieve temperature balance in the receiving cavity of the charging cabinet 370, a heating fan is usually used in conjunction with the heating module, that is, when the heating module performs the heating operation, the heating fan is turned on at the same time to blow the hot air from the heated heat sink to various parts of the charging cabinet 370, thereby improving the efficiency and effect of heating.

[0326] In some embodiments, the charging cabinet 370 also includes a cooling module (not shown), which is at least partially disposed inside the cabinet to avoid the risk of low charging efficiency and unsafe charging due to excessively high ambient temperature, excessively high battery pack temperature during charging, or excessively high temperature of the charging cabinet itself. Optionally, a cooling fan (not shown) used in conjunction with the cooling module is also provided in the charging cabinet 370, and the cooling fan is used to generate airflow to cool the backpack battery pack and / or handheld battery pack. The cooling fan and the heating fan may be the same fan or different fans.

[0327] Similar to the heating module, usually at least a lower limit threshold of high charging temperature is preset, which can be implemented by software or hardware. The hardware method is to use a simple comparator or set the above threshold in a hardware circuit. The software method is to preset the above threshold in the first management module 372 and control whether cooling is required based on the comparison result between the threshold and the actual temperature. Taking the software method as an example, the first management module 372 presets a preset lower limit threshold of high charging temperature, which is the lower limit condition for enabling the heat dissipation module. That is, when the first management module 372 determines that the real-time temperature of the detected charging cabinet 370 is higher than the lower limit threshold of high charging temperature, it generates a cooling instruction to the cooling module, and the cooling module responds to the cooling instruction and performs a cooling operation.

[0328] Of course, a cooling stop threshold can also be preset. For example, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 detected is not higher than the cooling stop threshold, a cooling stop instruction is generated to the cooling module, and the cooling module stops cooling in response to the cooling stop instruction.

[0329] In some embodiments, the cooling module can also stop in response to the activation of the heating module. That is, when the cooling module is performing a cooling operation, the first management module 372 generates a heating instruction, which means that cooling is no longer required, and a stop cooling instruction will be generated to stop the action of the cooling module. It can be understood that the cooling module can perform a cooling operation in response to any one of the conditions of the activation of the heating module and reaching the preset charging high temperature lower limit threshold.

[0330] The temperature of the charging cabinet 370 includes at least one of the ambient temperature inside the charging cabinet 370 , the temperature of the battery pack, and the temperature of the first management module 372 .

[0331] Optionally, the heating module and the cooling module operate using power provided by the AC charging device 360. In order to avoid power loss to each battery pack to be charged in the charging cabinet 370, external power received from the charging cabinet 370 is preferably used to power each module.

[0332] In some embodiments, Fig.25 As shown, the charging cabinet 370 also includes a display module 373. Optionally, the display module 373 is disposed on the cover 378 or any other suitable position on the charging cabinet 370, which is not specifically limited here.

[0333] The display module 373 is used to display at least one of the following: the connection status with the AC charging device 360, the power status of the AC charging device 360, the charging status of the AC charging device 360 ​​to the charging cabinet 370, the access status or charging status or charging time of each charging cabinet interface 371a, 371b, 371c and 371d in the charging cabinet 370, the electrical parameters of the battery pack connected to each charging cabinet interface 371a, 371b, 371c and 371d, the continuous working time of the charging cabinet 370 or the AC charging device 360, the date, the temperature, the communication status, the cooling status, and the heating status. The specific displayed information is not limited to this.

[0334] In some embodiments, the charging cabinet 370 further includes a locking module for unlocking and locking the cover 378 and the cabinet 377. Through the locking module, the user can lock the charging cabinet 370 to prevent theft, rain, fire, etc. during the charging process.

[0335] In some embodiments, the locking module includes at least one of a mechanical locking method and an electric locking method; the mechanical locking method generally includes a mechanical lock; and the electric locking method generally includes an electric locking lock.

[0336] Specifically, when the locking module uses a mechanical locking method, such as Fig.26 As shown, the locking module includes a first locking ring 378a provided on the cover 378 and a second locking ring 377a provided on the cabinet 377. When the lock passes through the first locking ring 378a and the second locking ring 377a and is fastened, the cover 378 and the cabinet 377 can be locked. Alternatively, when the locking module uses the electric locking mode, the locking module responds to the received locking control signal sent by the first management module 372 to lock the cabinet 377 and the cover 378 of the charging cabinet.

[0337] In some embodiments, the charging cabinet 370 may further include a wireless management module (not shown) for wireless communication with external devices. For example, when the charging cabinet 370 establishes wireless communication with a user's mobile device, the user can generate a locking instruction on the user's mobile device and send it to the charging cabinet 370. The first management module 372 controls the locking module to lock the cabinet 377 and the cover 378 based on the locking instruction.

[0338] In some embodiments, the charging cabinet 370 is further provided with a trigger key (not shown) for activating the charging cabinet 370 for further charging. When the trigger key is externally triggered, the charging cabinet 370 is activated and the display module 373 is lit. The trigger key can be optionally provided on the cabinet body 377 or the cover body 378.

[0339] Specifically, the trigger key can respond to an external trigger and send an activation signal to the first management module 372; the first management module 372 responds to the activation signal and detects the power supply status of the AC charging device 360 ​​connected to the charging cabinet 370; accordingly, when the first management module 372 determines that the power supply status is characterized by the AC charging device 360 ​​allowing the charging power to be output to the charging cabinet 370, it controls the continuous output of the power supply signal to achieve the power supply self-locking of the first management module 372; in one embodiment, considering that the charging cabinet 370 itself does not store power, the power supply self-locking of the first management module 372 is first powered by one of the battery packs on the charging cabinet 370. After the power supply self-locking is maintained for a certain period of time, in order to avoid unnecessary power loss of the battery pack, it will be converted to power supply by the AC charging device 360. When the first management module 372 determines that the power supply status is characterized by the AC charging device 360 ​​not allowing the charging power to be output to the charging cabinet 370, it controls to stop outputting the power supply signal after a first preset time delay to disconnect the power supply to the first management module 372.

[0340] In some embodiments, when the first management module 372 determines that all charging cabinet interfaces have no charging demand, the charging cabinet 370 fails, or the continuous working time of the charging cabinet 370 exceeds the second preset time, it controls to stop outputting the power supply signal to disconnect the power supply to the first management module 372. That is, when the charging cabinet 370 encounters the above situation, it does not need to continue charging or is not suitable for continuing charging, so the charging operation is stopped to prevent unnecessary loss of power of the fully charged battery pack, or to ensure the charging safety of the charging cabinet.

[0341] When the AC charging device 360 ​​is electrically connected to the charging cabinet 370, the AC charging device 360 ​​is also used to control the output of charging power to the charging cabinet 370. That is, the AC charging device 360 ​​controls the specific charging process of the charging cabinet 370, and the charging cabinet 370 does not control the charging of each charging cabinet charging interface 371a, 371b, 371c and 371d, but only distributes power to each charging cabinet charging interface 371a, 371b, 371c and 371d.

[0342] Continue to see Fig. 27 The AC charging device 360 ​​further includes an input power interface 362 and a main control module 363. The main control module 363 is used to output a power processing control signal to the charging circuit 364 when detecting that the input power is connected.

[0343] In some embodiments, the input power source includes at least an AC input power source, such as Fig.26 As shown, the AC charging device 360 ​​is connected to the AC input power supply through the input power supply interface 362. In addition, the input power supply may also include, but is not limited to, a DC input power supply, and the AC charging device may be connected to the DC input power supply through the input power supply interface.

[0344] In some embodiments, the input power source includes a DC input power source, and the AC charging device 360 ​​can be connected to the DC input power source through the charging interface 361. The AC charging device 360 ​​is also used to receive a DC input power source connected to a charging interface 361 and output charging power to the charging cabinet 370. Specifically, for example, a DC power source connected to a charging interface 361 can be used as a DC input power source to charge the charging cabinet 370 connected to the AC charging device 360.

[0345] In some embodiments, the main control module 363 is also used to generate a charging control signal based on the second electrical parameter information of the AC charging device 360 ​​and the first electrical parameter information of the charging cabinet 370 to control the output of charging power to the charging interface 361 and / or the output of charging power to the charging cabinet 370.

[0346] Specifically, in one embodiment, the first electrical parameter information includes at least one of the following: the number of charging cabinet interfaces 371 of the charging cabinet 370, the load demand parameter on the charging cabinet interface 371 of the charging cabinet 370, the safety parameter of the charging cabinet 370, and the fault threshold of the charging cabinet 370. In one embodiment, the second electrical parameter information includes at least one of the following: the electrical parameter of the charging interface 360, the charging capacity parameter of the AC charging device 360, the safety parameter of the AC charging device 360, and the fault threshold of the AC charging device 360.

[0347] In some embodiments, the first electrical parameter information may include at least a parameter characterizing the load state of the charging cabinet 370, and the second electrical parameter information may include at least a parameter characterizing the load state of the charging interface 361. The charging control signal may include at least a charging priority signal; the main control module 363 is also used to generate a charging priority signal for the charging interface 361 and / or the charging cabinet 371 according to the parameter characterizing the load state of the charging interface 361 and the parameter characterizing the load state of the charging cabinet 371, so as to control the charging circuit to output charging power to the charging interface 361 and / or the charging cabinet (e.g., the charging cabinet 370) according to the charging priority.

[0348] Among them, the charging priority signal usually represents a preset priority order; the preset priority order at least includes the order of the positions of the charging interface 361 and the charging cabinet interface 371, the insertion order of the battery pack, the capacity of the battery pack from high to low or from low to high, the remaining power of the battery pack from high to low or from low to high, the charging time of the battery pack from long to short or from short to long, the charging rate of the battery pack from high to low or from low to high, the temperature of the battery pack from high to low or from low to high, etc., which can be set according to actual needs and are not specifically limited here. In particular, the priority order can also be set by wireless communication and remote control using a mobile device.

[0349] In some embodiments, the main control module 363 can also be used, but is not limited to, to control at least one of the following items based on the first electrical parameter information and the second electrical parameter information: the charging mode of the AC charging device 360, the power output of each charging interface 361 of the AC charging device 360, fault detection and processing of the AC charging device 360 ​​and / or the charging cabinet 370, etc.

[0350] Specifically, to ensure the normal coordinated operation of the AC charging device 360 ​​and the charging cabinet 370, it is necessary to obtain various electrical parameters of the AC charging device 360 ​​and the charging cabinet 370 in real time, so as to perform further management and control based on the various electrical parameters. When the AC charging device 360 ​​and the charging cabinet 370 work in coordination, the AC charging device 360 ​​performs charging control, that is, controls at least one of the charging mode of the AC charging device 360, the power output of each charging interface 361a, 361b of the AC charging device 360 ​​and the charging cabinet 370, and the fault detection and processing of the AC charging device 360 ​​and / or the charging cabinet 370.

[0351] In some embodiments, the energy supply system 30 may further include a wireless communication module, which may be selectively disposed in the AC charging device 360 ​​or the charging cabinet 370. Taking the wireless communication module 379 disposed in the AC charging device 360 ​​as an example, the main control module 363 is also used to control at least one of the following: receiving a control instruction sent by a mobile device through the wireless communication module 379, and outputting a corresponding charging control signal according to the control instruction; receiving a program update instruction sent by a mobile device through the wireless communication module 379, and updating the program of the AC charging device 360 ​​and / or the charging cabinet 370 according to the program update instruction; and sending device parameter information of at least one of the battery pack, the AC charging device 360 ​​and the charging cabinet 370 to the mobile device through the wireless communication module 379.

[0352] It can be understood that when the AC charging device establishes wireless communication with the mobile device through the wireless communication module, it can also receive various functional instructions such as display, locking, heating, cooling, etc. that can be controlled by the AC charging device and / or the charging cabinet sent by the mobile device to realize remote control of the energy supply system.

[0353] The AC charging device 360 ​​in the energy supply system 30 provided in this embodiment can be detachably connected to a backpack battery pack and / or a handheld battery pack, and can control the output of charging power to the charging cabinet 370 and the charging interface 361. Therefore, the backpack battery pack and / or the handheld battery pack can directly receive the charging power provided by the AC charging device 360 ​​through the charging interface 361 of the AC charging device 360, or can receive the charging power provided by the AC charging device 360 ​​through the charging cabinet 370, and the charging flexibility is high. The charging cabinet 370 does not need to be equipped with an additional charging module, which reduces the size and cost of the charging cabinet 370, and also reduces unnecessary power loss during the charging process. In addition, the charging cabinet 370 expands the number of charging interfaces, so that users can fully charge multiple backpack battery packs and / or handheld battery packs at one time to meet the power demand of the next day.

[0354] Fig.28 3 is a schematic diagram of the circuit structure of an energy supply system provided by other embodiments of the present application. The energy supply system includes an AC charging device 360a, a first charging cabinet 370a and at least one second charging cabinet 370b ( Fig.28 Only one is shown, but the present application is not limited thereto).

[0355] The AC charging device 360a includes a charging interface 361a and a main control module 363a. In one embodiment, the AC charging device 360a may also include a charging output interface 366a, which is used to connect to the first charging cabinet 370a or the second charging cabinet 370b. The first charging cabinet 370a and the second charging cabinet 370b may be selectively connected to the charging interface 361a or the charging output interface 366a to obtain power.

[0356] In some embodiments, the first charging cabinet 370a includes a first management module 372a and a charging cabinet interface 373a.

[0357] Specifically, the structure and / or working principle of at least one of the charging interface 361a in the AC charging device 360a, the main control module 363a, the first management module 372a in the first charging cabinet 370a, and the charging interface 361a can refer to the previous description of the AC charging device 360, and will not be repeated here.

[0358] In some embodiments, the second charging cabinet 370b is used to connect to the charging interface 361a and / or the charging output interface 366a of the AC charging device 360a to receive the charging power provided by the AC charging device 360a. In other embodiments, the second charging cabinet 370b may also be connected to the output interface of the first charging cabinet 370a, but is not limited to, to receive the charging power provided by the AC charging device 360a, wherein the output interface of the first charging cabinet 370a may be set as a charging cabinet interface 373a.

[0359] Specifically, in some embodiments, the second charging cabinet 370b includes a second management module 372b. The second management module 372b is used to establish a communication connection with the main control module 363a of the AC charging device 360a to receive the second electrical parameter information and the charging control signal sent by the main control module 363a, and send the third electrical parameter of the second charging cabinet 370b to the main control module 363a or to the main control module 363a through the first management module 372a of the first charging cabinet 370a, and send the corresponding charging control instruction to control the charging process of the second charging cabinet 370b.

[0360] Specifically, in some embodiments, the second management module 372b is used to control at least one of the following items according to the third electrical parameter information: parameter collection of the second charging cabinet 370b, power distribution of the charging cabinet interface 371 of each second charging cabinet 370b, charging management of the second charging cabinet 370b, fault detection feedback and processing.

[0361] The energy supply system 30 of this embodiment includes an AC charging device 360a, a first charging cabinet 370a and at least one second charging cabinet 370b. Among them, at least one second charging cabinet 370b can be connected to the charging interface 361a of the first charging cabinet 370a to receive the charging power provided by the AC charging device 360a, or can be directly connected to the charger output interface 366a of the AC charging device 360a to receive the charging power provided by the AC charging device 360a, which can further improve flexibility. And the charging power of the first charging cabinet 370a and the second charging cabinet 370b can be uniformly provided by the AC charging device 360a. Therefore, there is no need to set up corresponding charging circuits in the first charging cabinet 370a and the second charging cabinet 370b, thereby simplifying the electrical design of the first charging cabinet 370a and the second charging cabinet 370b, avoiding the redundancy of the charging circuit, and thus reducing the cost of the charging system. In addition, the power distribution of the charging interfaces of the first charging cabinet 370a and the second charging cabinet 370b corresponding to the first charging cabinet 370a and the second charging cabinet 370b are respectively implemented by the corresponding first management module 372a and the first management module 372b, which can improve the accuracy and timeliness of power distribution management.

[0362] In some embodiments, Fig.29As shown, the working system 1 also includes a cart 50, which includes a cart body 500 and rollers 510 supporting the cart body 500, and the cart 50 is used to transport at least one of the power tool system 10, the battery pack system 20 and the energy supply system 30.

[0363] Since garden maintenance work often requires changing work locations, the cart 50 can solve the transportation problem of the work system 1 and facilitate users to move various types of equipment.

[0364] Specifically, the cart body 500 includes a bracket 501 and a push rod 502. The bracket 501 is configured to place various devices in the working system 1. The bracket 501 is connected to the roller 510, and the push rod 502 is connected to the bracket 501 at an angle. In this embodiment, the extension direction of the push rod 502 is perpendicular to the extension direction of the bracket 501.

[0365] Further, the cart body 500 further includes an armrest 503, and the armrest 503 is connected to the push rod 502. Optionally, the armrest 503 is pivotally connected to the push rod 502, and the user can change the angle of the armrest to achieve comfortable pushing.

[0366] The present application also provides a working system, which includes a power supply system and an electric tool system, and the power supply system includes a battery pack system and an energy supply system.

[0367] The battery pack system includes a first type battery pack and a second type battery pack, the first type battery pack is configured to be detachably mounted on a first type power tool to power the first type power tool, and the second type battery pack is configured to be detachably mounted on a second type power tool to power the second type power tool; wherein the rated power of the first type battery pack ranges from 550 to 3000 Wh, and the weight of the first type battery pack ranges from 4 to 12 kg;

[0368] The energy supply system includes a DC charging device, the DC charging device includes an input interface and an output interface, the input interface is configured to detachably install a first type of battery pack, and the output interface is configured to detachably install the first type of battery pack;

[0369] The DC charging device also includes at least one DC charging module, which is configured to convert the electrical energy of the first type battery pack and transmit it to the second type battery pack, so that the first type battery pack charges the second type battery pack.

[0370] When the work team takes the above-mentioned work system out to work, the first type of battery pack can not only power the power tools, in other words, the first type of battery pack can be used as a tool pack, but also can be used as an energy storage pack to power the second type of battery pack. In this way, the second type of battery pack can be recharged in time, so that a small amount of the second type of battery pack can be recycled, and the power tool system can work for a long time without carrying and purchasing a large number of battery packs, thereby improving work efficiency. In addition, the first type of battery pack has a large amount of power and a light weight, which can not only replenish sufficient power for the second type of battery pack, but also be easy to carry and use. In addition, users can use the second type of battery pack more, and the second type of battery pack can be directly installed on the second type of power tool for use, without the need to carry it on the back, which is more portable and cheaper for users to use.

[0371] For details about the specific structure of the power supply system and the power tool system and the mechanical and electrical connection relationship between them, please refer to the attached Figures 2 to 28 It should be noted that the first type of battery pack can be configured as a backpack battery pack, and the second type of battery pack can be configured as a handheld battery pack.

[0372] The present application also provides an energy supply system, including a DC charging device, the DC charging device including an input interface and an output interface, the input interface is configured to detachably install a first type of battery pack, and the output interface is configured to detachably install a second type of battery pack.

[0373] The DC charging device also includes a DC charging module, which is used to convert the electrical energy of the first type battery pack and transmit it to the second type battery pack, so that the first type battery pack charges the second type battery pack. The DC charging device is only provided with an input interface for receiving power input.

[0374] The DC charging device in the above energy supply system is provided with only an input interface for receiving power input, and no other DC input interface and / or AC input interface is provided, thereby simplifying the power conversion module, making the DC charging device compact, light and portable, and low in cost.

[0375] In some embodiments, Fig.30 As shown, the energy supply system 30' includes a DC charging device 300'. For details about the specific structure of the DC charging device, please refer to the attached Figures 17 to 23 It should be noted that the first type of battery pack can be configured as the aforementioned backpack battery pack, and the second type of battery pack can be configured as the aforementioned handheld battery pack.

[0376] Furthermore, the energy supply system also includes at least one AC charging device, which includes an input power interface, at least one charging interface and at least one AC charging module. The input power interface is configured to connect to an AC power source, and the charging interface is configured to detachably install a first type of battery pack and / or a second type of battery pack. The AC charging module is configured to connect to the input power interface and convert AC power into DC power and output it to the charging interface to charge the first type of battery pack and / or the second type of battery pack.

[0377] The energy supply system includes a DC charging device and an AC charging device, which allows the work team to carry only the DC charging device during the day and use the backpack battery pack as an energy storage pack to power the handheld battery pack to achieve long-term work. After returning home at night, the backpack battery pack and / or handheld battery pack are charged with the AC charging device to meet the power requirements for the next day's work. This arrangement allows the work team to carry and transport the equipment easily without having to carry too many devices during the day.

[0378] In some embodiments, see Fig.30 The energy supply system 30' also includes an AC charging device 360'. For details about the specific structure of the AC charging device, please refer to the attached Fig.23 And the corresponding expressions mentioned above will not be repeated here.

[0379] Furthermore, the energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is configured to be detachably connected to the first type of battery pack and / or the second type of battery pack, and the charging module is configured to be connected to the charging interface and transmit the electric energy output by the charging interface to the charging cabinet, so as to charge the first type of battery pack and / or the second type of battery pack.

[0380] The energy supply system includes a charging cabinet that can expand the charging interface to meet the charging needs of more battery packs. When the work team returns home at night, they can use the AC charging device and charging cabinet to recharge each low-power battery pack to meet the work needs of the next day.

[0381] In some embodiments, see Fig.30 The energy supply system 30' also includes a charging cabinet 370'. For details about the specific structure of the charging cabinet and the connection between the charging cabinet and the AC charging device, please refer to the attached Figure 23 to Figure 28 And the corresponding expressions mentioned above will not be repeated here.

[0382] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0383] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy supply system, characterized in that: A DC charging device is included, wherein the DC charging device includes: an input interface and an output interface, the input interface being configured to detachably mount a first type battery pack, and the output interface being configured to detachably mount a second type battery pack; a DC charging module, the DC charging module being configured to receive the electric energy from the input interface, convert the electric energy, and transmit the electric energy to the output interface, so that the first type battery pack charges the second type battery pack; Wherein, the DC charging device is only provided with the input interface for receiving power input.

2. The energy supply system according to claim 1, characterized in that: The input interface is configured to only receive power input from the first type battery pack and not output power to the outside; the output interface is configured to only output power to the second type battery pack and not receive external power input.

3. The energy supply system according to claim 1, characterized in that: The input interface includes a pair of first connection parts extending along a first plugging direction, and the first connection parts are used to guide the first type of battery pack to be connected to the DC charging device along the first plugging direction; and / or the output interface includes a pair of second connection parts extending along a second plugging direction, and the second connection parts are used to guide the second type of battery pack to be connected to the DC charging device along the second plugging direction.

4. The energy supply system according to claim 3, characterized in that: A maximum dimension of the first connection portion in the first plugging direction is greater than a maximum dimension of the second connection portion in the second plugging direction.

5. The energy supply system according to claim 1, characterized in that: The DC charging device includes a shell extending longitudinally along a height direction, and the input interface and the output interface are arranged opposite to each other along a width direction perpendicular to the height direction.

6. The energy supply system according to claim 1, characterized in that: The DC charging device further includes a heating module and / or a cooling module configured to heat and / or cool the first type battery pack and the second type battery pack.

7. The energy supply system according to claim 1, characterized in that: The energy supply system also includes at least one AC charging device, which includes an input power interface, at least one charging interface and at least one AC charging module. The input power interface is configured to connect to an AC power source, and the charging interface is configured to detachably install the first type of battery pack and / or the second type of battery pack. The AC charging module is configured to receive the AC power from the input power interface, convert it into DC power and output it to the charging interface, so as to charge the first type of battery pack and / or the second type of battery pack.

8. The energy supply system according to claim 7, characterized in that: The charging interface has the same structure as the input interface; and / or, the charging interface has the same structure as the output interface; and / or, the charging interface includes the structures of the input interface and the output interface.

9. The energy supply system according to claim 7, characterized in that: The energy supply system also includes a charging cabinet, which includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is configured to be detachably connected to the first type of battery pack and / or the second type of battery pack, and the charging module is configured to receive electrical energy from the charging interface and transmit it to the charging cabinet interface to charge the first type of battery pack and / or the second type of battery pack.

10. The energy supply system according to claim 9, characterized in that: The energy supply system also includes a connecting device, the charging cabinet includes an input interface, and the connecting device is configured to connect the charging interface and the input interface to achieve transmission of the electric energy output by the charging interface to the charging cabinet.

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