Power 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 is a divisional application of the Chinese utility model patent application filed by the applicant on April 28, 2024, entitled "Energy Supply System", with application number 202420908649.2. Technical Field

[0002] This application relates to an energy supply system. Background Technology

[0003] In some work scenarios, such as outdoor work, it is often necessary to use power tools to work continuously for extended periods of time. Therefore, the selection of the power source is the primary consideration for enabling uninterrupted operation of power tools.

[0004] Generally speaking, fuel-powered tools (hereinafter referred to as fuel-powered tools, such as gasoline-powered tools) can meet the requirements of long-term uninterrupted work. However, the main problems with fuel-powered tools are that the exhaust fumes they release pollute the environment, and the noise they produce during operation also contributes to noise pollution of the surrounding environment.

[0005] Power tools offer advantages such as being environmentally friendly and clean, and they also produce relatively less noise compared to fuel-powered tools. Therefore, power tools are increasingly favored by power tool users. However, a major drawback of power tools is the relatively short battery life provided by their battery packs. This problem is particularly pronounced outdoors or in situations without access to AC outlets.

[0006] To meet the need for power tools to operate continuously for extended periods without the need for mains power outlets, a common solution is for users to purchase an energy storage power supply and a power supply device. This energy storage power supply has sufficient charge to meet the needs of continuous operation for a longer period of time, and the power supply device then uses the energy storage power supply to transfer power to the battery pack that powers the power tools, so that the battery pack can meet the power requirements for long-term operation. Utility Model Content

[0007] Based on this, this 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 being configured to be detachably installed on a first type of power tool to power it, and the handheld battery pack being configured to be detachably installed on a second type of power tool to power it; wherein, the backpack battery pack is configured to be carried by a user; the energy supply system includes a DC charging device, the DC charging device including an input interface and an output interface, the input interface being configured to detachably install the backpack battery pack, and the output interface being configured to detachably install the handheld battery pack; the DC charging device further includes at least one DC charging module, the DC charging module being configured to receive electrical energy from 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 further includes a carrying device configured to be carried by a user. The carrying device includes a cable and a connector and a first carrying interface connected by the cable. The first carrying interface is configured to detachably mount a carrying battery pack. The connector is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the connector and the carrying battery pack is mounted to the first carrying interface, the carrying battery pack powers the second type of power tool.

[0009] In one embodiment, the first carrying interface includes a pair of first connectors extending along a first insertion direction, the first connectors being used to guide the carrying battery pack to connect to the carrying device along the first insertion direction.

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

[0011] In one embodiment, the second carrying interface includes a pair of second connectors extending along a second insertion direction, the second connectors being used to guide a handheld battery pack to connect to the carrying device along the second insertion direction.

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

[0013] In one embodiment, a handheld battery pack is configured to be detachably mounted to a first type of power tool so that the handheld battery pack powers 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 ranges from 4 to 12 kg.

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

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

[0018] In one embodiment, the rated capacity-to-volume ratio 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, the average charging power of the DC charging device to the handheld battery pack is greater than the average discharging power of the second type of power tool to the handheld battery pack.

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

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

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

[0025] In one embodiment, the rated capacity-to-weight ratio of the backpack battery pack ranges from 60 to 300 Wh / kg, and the maximum permissible 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 charge from an empty state to a fully charged state is less than or equal to the time required for the handheld battery pack to discharge from a fully charged state to an empty state.

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

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

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

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

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

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

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

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

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

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

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

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

[0040] In one embodiment, the DC charging device includes a housing extending longitudinally along the height direction, with the input interface and output interface disposed opposite each other along the 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 further 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 mount 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 construction as the input interface; and / or, the charging interface has the same construction as the output interface; and / or, the charging interface includes the construction of both an input interface and an output interface.

[0044] In one embodiment, the energy supply system further 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 connection device, and the charging cabinet includes an input interface. The connection device is configured to connect the charging interface and the input interface to transmit electrical energy output from 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 being configured to connect to an input interface and the adapter being configured to detachably connect to a charging interface.

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

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

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

[0050] In one embodiment, the work system further includes a trolley comprising a body and rollers supporting the body, the trolley being used to transport at least one of a power tool system, a battery pack system, and an 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] This 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 being configured to be detachably installed on a first type power tool to power it, and the second type battery pack being configured to be detachably installed on a second type power tool to power it; wherein, the rated capacity of the first type battery pack is in the range of 550-3000Wh, and the weight of the first type battery pack is in the range of 4-12Kg; the energy supply system includes a DC charging device, the DC charging device including an input interface and an output interface, the input interface being configured to detachably install the first type battery pack, and the output interface being configured to detachably install the first type battery pack; the DC charging device further includes at least one DC charging module, the DC charging module being configured to receive electrical energy from 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 of battery pack is configured to be carried by a user.

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

[0055] In one embodiment, the first carrying interface includes a pair of first connectors extending along a first insertion direction, the first connectors being used to guide a first type of battery pack to connect to the carrying device along the first insertion direction.

[0056] In one embodiment, the power supply system further includes a carrying device configured to be carried by a user. The carrying device includes a cable and a plug-in and a second carrying interface connected by the cable. The second carrying interface is configured to detachably mount a second type of battery pack, and the plug-in is configured to detachably connect a second type of power tool. When the second type of power tool is connected to the plug-in and the second type of battery pack is mounted to the second carrying interface, the second type of battery pack powers the second type of power tool.

[0057] In one embodiment, the second carrying interface includes a pair of second connectors extending along a second insertion direction, the second connectors being used to guide a second type of battery pack to connect to the carrying device along the second insertion direction.

[0058] In one embodiment, the first type of power tool further includes a back frame configured for a user to carry the first type of power tool, and a first type of battery pack configured to be detachably mounted to the back frame so that the first type of battery pack powers the first type of power tool.

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

[0060] In one embodiment, the rated capacity-to-weight ratio of the first type of battery pack ranges from 60 to 300 Wh / kg.

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

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

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

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

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

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

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

[0068] In one embodiment, the rated capacity-to-weight ratio of the first type of battery pack ranges from 60 to 300 Wh / kg, and the maximum permissible charging rate of the second type of battery pack is not less than 7C.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0083] In one embodiment, the DC charging device includes a housing extending longitudinally along the height direction, with the input interface and output interface disposed opposite each other along the 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 of battery pack and the second type of battery pack.

[0085] In one embodiment, the energy supply system further 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 mount 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 construction as the input interface; and / or, the charging interface has the same construction as the output interface; and / or, the charging interface includes the construction of both an input interface and an output interface.

[0087] In one embodiment, the energy supply system further 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 of battery pack and / or a 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.

[0088] In one embodiment, the energy supply system further includes a connection device, and the charging cabinet includes an input interface. The connection device is configured to connect the charging interface and the input interface to transmit electrical energy output from 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 being configured to connect to an input interface and the adapter being configured to detachably connect to a charging interface.

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

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

[0092] This 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 including a first tool interface, and the second type of electric tool including a second tool interface different from the first tool interface.

[0093] In one embodiment, the work system further includes a trolley comprising a body and rollers supporting the body, the trolley being used to transport at least one of a power tool system, a battery pack system, and an 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] This application also provides an energy supply system, including a DC charging device, which includes an input interface and an output interface. The input interface is configured to detachably mount a first type of battery pack, and the output interface is configured to detachably mount a second type of battery pack. A 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. The DC charging device only has an input interface for receiving electrical input.

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

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

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

[0099] In one embodiment, the DC charging device includes a housing extending longitudinally along the height direction, with the input interface and output interface disposed opposite each other along the 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 of battery pack and the second type of battery pack.

[0101] In one embodiment, the energy supply system further 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 mount 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 construction as the input interface; and / or, the charging interface has the same construction as the output interface; and / or, the charging interface includes the construction of both an input interface and an output interface.

[0103] In one embodiment, the energy supply system further 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 of battery pack and / or a 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.

[0104] In one embodiment, the energy supply system further includes a connection device, and the charging cabinet includes an input interface. The connection device is configured to connect the charging interface and the input interface to transmit electrical energy output from 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 being configured to connect to an AC charging device, and the adapter being configured to detachably connect to a charging interface.

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

[0107] In one embodiment, the charging cabinet is provided with a thermal management module configured to perform temperature control on a first type of battery pack and / or a second type of battery pack. Attached Figure Description

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

[0109] Figure 1 This is a schematic diagram of a working system provided in this application.

[0110] Figure 2 This is a schematic diagram of an electric tool system provided in this application.

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

[0112] Figure 4 This is a schematic diagram of the backpack battery pack provided in this application capable of powering a type 1 power tool.

[0113] Figure 5 This is a schematic diagram of the backpack battery pack provided in this application installed on a lawnmower.

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

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

[0116] Figure 8 This is a schematic diagram of the handheld battery pack provided in this application capable of powering a type 1 power tool.

[0117] Figure 9 This is a schematic diagram of the handheld battery pack provided in this application installed on a lawnmower.

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

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

[0120] Figure 12 This is a schematic diagram illustrating how the handheld battery pack provided in this application can power a second type of power tool.

[0121] Figure 13 This is a schematic diagram of the handheld battery pack provided in this application installed on a lawn mower.

[0122] Figure 14 This is a schematic diagram of the backpack battery pack provided in this application supplying power to a second type of power tool via a carrying device.

[0123] Figure 15 This is a schematic diagram of the carrying device provided in this application.

[0124] Figure 16 This is a schematic diagram of the handheld battery pack provided in this application supplying power to a second type of power tool via a carrying device.

[0125] Figure 17 This is a schematic diagram of the DC charging device provided in this application from one perspective.

[0126] Figure 18 This is a schematic diagram of the DC charging device provided in this application from another perspective.

[0127] Figure 19 This is a schematic diagram of a backpack battery pack and a handheld battery pack installed on a DC charging device, as provided in this application.

[0128] Figure 20 This is a schematic diagram of another backpack battery pack and handheld battery pack provided in this application installed on a DC charging device.

[0129] Figure 21 This is a schematic diagram of the circuit structure of the power supply system provided in this application.

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

[0131] Figure 23 This is a schematic diagram of the structure of the first and second air ducts provided in this application.

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

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

[0134] Figure 26 This is a schematic diagram showing the AC charging device and charging cabinet provided in this application connected by a connecting device.

[0135] Figure 27 This is a schematic diagram of the circuit structure of an energy supply system provided in this application.

[0136] Figure 28 This is a schematic diagram of the circuit structure of another energy supply system provided in this application.

[0137] Figure 29 This is a schematic diagram of a trolley transport power supply system and an electric tool system provided in this application.

[0138] Figure 30 This is a schematic diagram of an energy supply system provided in this application. Detailed Implementation

[0139] The present application will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present application.

[0140] It should be noted that when an element is described as "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. In the illustrated embodiments, the directional representations, i.e., up, down, left, right, front, and back, are relative and used to explain the relative structure and movement of different components in this application. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly.

[0141] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0142] Electricity is an environmentally friendly and clean energy source. Therefore, power tools are increasingly favored. Especially for landscaping work, which inherently possesses green and environmentally friendly attributes, power tools are the ideal choice for landscaping workers and companies. However, the main problem with current power tools is insufficient power supply, making it impossible to support continuous operation for extended periods. Furthermore, landscaping work is typically done outdoors, where there are often no mains outlets, meaning that even when power tools are used, they cannot be recharged promptly.

[0143] To meet the need for power tools to operate continuously for extended periods without a mains outlet, a common solution is for users to purchase a power storage device and a power supply unit. This power storage device has sufficient charge for prolonged operation, and the power supply unit then transfers power from the storage device to the battery pack that powers the power tool, ensuring the battery pack meets the power requirements for extended use. However, this presents some challenges.

[0144] For commercial gardening tools, a common use case is a team of 2-3 workers who spend a day tending to the gardens of 10-20 families. Once one garden is finished, the team moves on to another and repeats the process until all tasks for the day are completed. This demonstrates that garden maintenance work is labor-intensive and energy-intensive; it also involves traveling to multiple locations throughout the day and frequently requires carrying equipment.

[0145] Therefore, for the above solutions, since the daily power consumption is very high, the energy storage power supply needs to be set to a very high capacity, which inevitably leads to high costs and increases the economic burden on users. At the same time, due to technological limitations, the energy density of energy storage units is generally not high, which results in the energy storage power supply being very heavy, making it inconvenient for users to transport and use outdoors, and unfavorable for frequent relocation.

[0146] To address the issue of heavy equipment hindering relocation, one solution is to design multiple energy storage power sources with relatively small weight and capacity. However, this still doesn't solve the problem of high costs. Using inexpensive energy storage power sources as a cost-reduction measure may also introduce safety and reliability issues.

[0147] Therefore, this application provides a different problem-solving approach. This approach, through the reasonable design of a working system, can effectively avoid the above-mentioned problems. The working system is lightweight, portable, and low-cost, making it more suitable for use by landscape workers.

[0148] The inventors of this application astutely recognized that gardeners typically need to purchase two different types of battery packs: backpack battery packs and handheld battery packs. Furthermore, the usage scenarios for these two different types of battery packs also differ seasonally, which will be analyzed in detail below.

[0149] Different gardening tools have significantly different rated power, and can be broadly categorized into two types: high-power tools, such as lawnmowers and backpack hair dryers; and low-power tools, such as handheld hair dryers, lawn mowers, and pruning shears. High-power and low-power tools also have different battery pack requirements. Generally, battery packs for high-power tools have larger capacities, resulting in heavier packs that users need to carry on their backs to reduce weight. Conversely, battery packs for low-power tools have smaller capacities, making them lighter and more portable, and also more cost-effective. Therefore, to match the usage needs of different power tools, users need to purchase both backpack and handheld battery packs.

[0150] Furthermore, the demand for garden tools varies greatly across different seasons, leading to significant differences in the required battery packs. For instance, during spring and summer, when lawns and trees are lush and growing, there is a high demand for small-powered power tools such as lawnmowers and pruning shears. However, in autumn, when lawn growth stagnates and trees begin to shed their leaves, users no longer need as many lawnmowers and pruning shears, and their demand shifts more towards high-powered power tools like backpack hair dryers for clearing fallen leaves.

[0151] However, this leads to battery packs being idle in every season. In spring and summer, users spend most of their time using low-power power tools, leaving backpack battery packs that power high-power tools idle; in autumn, users spend most of their time using high-power power tools, leaving handheld battery packs that power low-power tools idle, resulting in a waste of resources.

[0152] Therefore, this application provides a working system that utilizes a backpack battery pack, which is often idle, to power a frequently used handheld battery pack. This enables the power tool to work continuously for a relatively long period (e.g., one day). During this time, the user of the power tool does not need to worry about insufficient power supply, and the user can effectively utilize both types of battery packs in the battery pack system, effectively reducing battery pack idleness. In addition, since the user has already purchased a backpack battery pack, using the existing backpack battery pack to replenish the handheld battery pack eliminates the need to purchase a separate energy storage power source. Furthermore, the backpack battery pack is relatively lightweight, thus the working system is also lightweight, portable, and low-cost. The working system is described in detail below.

[0153] Specifically, the working system includes a power supply system and a power tool system. The power supply system includes a battery pack system and an energy supply system, providing sufficient power to the power tool system. The power tool system includes first-type power tools and second-type power tools. First-type power tools include gardening tools such as lawnmowers and backpack hair dryers, while second-type power tools typically include handheld hair dryers, lawn mowers, and pruning machines, used for garden maintenance. The battery pack system includes at least one backpack battery pack and at least one handheld battery pack, used to power the power tool system. The backpack battery pack is configured to be detachably mounted to the first-type power tool for power, and the handheld battery pack is configured to be detachably mounted to the second-type power tool for power. The energy supply system includes a DC charging device for converting power from the backpack battery pack to supply power to the handheld battery pack.

[0154] When the work team takes the aforementioned work system to the field, the backpack battery pack can power both the power tools (in other words, it can be used as a tool bag) and the handheld battery pack (a power storage pack for the handheld battery pack). This solves the problem of the backpack battery pack being idle during the season and allows the handheld battery pack to be recharged promptly. This enables the use of a small number of handheld battery packs in rotation, eliminating the need to carry and purchase a large number of battery packs, allowing the power tool system to work for extended periods and improving work efficiency. Furthermore, the backpack battery pack is lightweight and easy to carry and use. Users can also make greater use of the handheld battery pack, which can be directly installed on the second type of power tool, eliminating the need for carrying it on the back, making it more portable and cost-effective.

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

[0156] In some embodiments, such as Figure 2 As shown, the first type of power tools is configured as garden power tools such as a lawnmower 110 and a backpack hair dryer 120, and the second type of power tools is configured as garden power tools such as a handheld hair dryer 130, a lawn mower 140, and a pruning machine 150. In some embodiments, such 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 and second-type power tools can be the same or different. For example, if the work performed by the power tool system is relatively simple and can be completed by one first-type and one second-type power tool, then only one first-type and one second-type power tool need to be configured for the user of the working system 1. Conversely, if the work performed by the power tool system 2 is diverse and requires multiple first-type and multiple second-type power tools to work together, then multiple first-type and multiple second-type power tools can be configured for the user of the working system 1. 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, where 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 and handheld battery packs may be the same or different. The battery pack system 20 may be divided into two groups: a working battery pack and a backup battery pack. The number of battery packs in each group can be set according to the number of power tools required for simultaneous operation. The working battery pack refers to the battery pack currently powering the power tools, while the backup battery pack refers to the battery pack temporarily not powering the power tools. The working battery pack may include only a handheld battery pack, or it may include both a handheld battery pack and a backpack battery pack. The backup battery pack must 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 it may be 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 runs out of power, it can be installed on a DC charging device to be recharged by the backpack battery pack, and the handheld battery pack in the backup battery pack can take over the work; when the backpack battery pack in the working battery pack runs out of power, the backpack battery pack in the backup battery pack can take over the work.

[0159] As an alternative, the number of working battery packs can be the same as the number of power tools operating simultaneously. The number of spare battery packs can be the same as the number of working battery packs, or the number of spare battery packs can be greater than the number of working battery packs to prevent insufficient spare battery packs from supporting uninterrupted operation of the power tools if one working battery pack fails. For example, a work team typically consists of two people. When working on a garden, one worker uses a lawnmower 110 to mow the lawn. While mowing, the other worker uses handheld power tools to perform other types of tasks sequentially, such as trimming, pruning, and blow-drying. The two workers complete all tasks roughly simultaneously, so two power tools are operating simultaneously. When configuring the battery pack system, two working battery packs and three or four spare battery packs can be configured. The above battery pack configuration is only an example; in actual use, users can configure it according to the type of power tools, aiming for the minimum number of battery packs required and the ability to use them alternately without interruption.

[0160] As an alternative approach, 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 spare battery packs can be equal to the number of working battery packs. When the work team is working outdoors, they can pre-install battery packs on each power tool they carry, so that they can use them directly without installing battery packs when switching from one power tool to another, which is more in line with the usage habits of workers when using traditional fuel-powered tools. For example, before each work team arrives at a garden, they can pre-install a battery pack for each of the following: lawnmower 110, backpack hair dryer 120, handheld hair dryer 130, lawn trimmer 140, and pruning machine 150. While one worker is mowing the lawn with lawnmower 110, another worker is trimming the lawn with lawn trimmer 140. After the trimming is finished, the worker can directly use pruning machine 150 for pruning without installing a battery pack for pruning machine 150. After the pruning is finished, the worker can directly use backpack hair dryer 120 or handheld hair dryer 130 for drying without installing a battery pack for backpack hair dryer 120 or handheld hair dryer 130.

[0161] It should be noted that when there are multiple (two or more) backpack and handheld battery packs in the battery pack system, all backpack battery packs have the same interface for installation into the first tool interface and input interface. The multiple backpack battery packs can all be of the same type, all of different types, or some of the backpack battery packs can be of the same type while others are different types. Similarly, the multiple handheld battery packs have the same interface for installation into the second type of power tool. The multiple handheld battery packs can also all be of the same type, all of different types, or some of the handheld battery packs can be of the same type while others are different types. Here, "different types of battery packs" refers to one or more differences in the capacity of individual cells, the type of individual cells, the internal structure of the battery pack, the shape of the battery pack, etc. In some embodiments, such as... Figure 3 As shown, the backpack battery pack system 21 includes two types of backpack battery packs 200 and 200', and the handheld battery pack system 22 includes two types of handheld battery packs 210 and 210'. The capacity, type of individual battery cells, internal structure and shape of the two backpack battery packs 200 and 200' are different, and the capacity, type of individual battery cells, internal structure and shape 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 as needed to perform the required power conversion.

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

[0164] A 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, such as Figure 4 As shown, the first type of power tool system 11 includes two types of first type power tools, namely a lawnmower 110 and a backpack hair dryer 120. The lawnmower 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. The backpack battery packs 200 and 200' can be detachably installed to the first tool interfaces 111 and 121.

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

[0166] Correspondingly, such as Figure 7 As shown, the backpack battery pack 200 includes a backpack battery pack interface 201. The backpack battery pack interface 210 includes a pair of first mating parts 201a and 201b. The pair of first mating parts 201a and 201b are used to cooperate with a pair of first guide parts 111a and 111b respectively to realize the sliding connection between the lawnmower 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 powers the first type of power tool. The first type of power tool is compatible with both backpack and handheld battery packs with different interfaces, which facilitates the versatility of the battery pack system. When the backpack battery pack in the working battery pack is depleted, the first type of power tool can be powered either by the backpack battery pack in the backup battery pack or by the handheld battery pack in the backup battery pack. In some embodiments, such as Figure 8As shown, both handheld battery packs 210 and 210' can be detachably mounted to the lawnmower 110 and the backpack blower 120 so that the handheld battery packs 210 and 210' can power the lawnmower 110 and the backpack blower 120.

[0168] In some embodiments, the first type of power tool further includes a third tool interface configured to removably mount a handheld battery pack so that the handheld battery pack powers the first type of power tool. Figure 9 As shown, taking the installation of the handheld battery pack 210 and the lawnmower 110 as an example, the lawnmower 110 also includes a third tool interface 113, and the handheld battery pack 210 is detachably installed on the third tool interface 113 to power the lawnmower 110.

[0169] Specifically, such as 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. The third guide portions 113a and 113b guide the handheld battery pack 210 to slide onto the lawnmower 110 along the third sliding direction A3. Alternatively, the handheld battery pack 210 can also be slidably removed from the lawnmower 110 in a 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 guide portions 111a, 111b and the pair of third guide portions 113a, 113b are independent of each other, and in the width direction perpendicular to the vertical direction, the pair of first guide portions 111a, 111b are located on both sides of the pair of third guide portions 113a, 113b. This arrangement reduces the size of the first tool interface and the third tool interface, which is beneficial for miniaturizing the first type of power tool. It should be noted that "the pair of first guide portions and the pair of third guide portions are independent of each other" can be understood as the functions of the pair of first guide portions being independent of the functions of the pair of third guide portions. In other words, the functions of the pair of first guide portions 111a, 111b in guiding the backpack battery pack 200 to be installed with the lawnmower 110 along the first sliding direction A1 and the functions of the pair of third guide portions 113a, 113b in guiding the handheld battery pack 210 to be installed with the lawnmower 110 along the third sliding direction A3 do not overlap.

[0171] Furthermore, the phrase "a pair of first guide portions 111a and 111b are located on both sides of a pair of third guide portions 113a and 113b" can be understood as follows: one of the first guide portions 111a is located outside one of the third guide portions 113a, and the other of the first guide portions 111b is located outside the other of the third guide portions 113b. Moreover, in the width direction B perpendicular to the first sliding direction A1 and the third sliding direction A3, the distance between the pair of first guide portions 111a and 111b is greater than the distance between the pair of third guide portions 113a and 113b.

[0172] like Figure 6 As shown, a pair of first guide portions 111a and 111b are arranged facing away from each other, while a pair of third guide portions 113a and 113b are arranged facing each other. Based on this arrangement, the pair of first guide portions 111a and 111b are configured as an external guide rail, and the pair of third guide portions 113a and 113b are configured as an internal guide rail, correspondingly, as... Figure 7 and Figure 10 As shown, a pair of first mating parts 201a and 201b are configured as a pair of inner guide grooves, and a pair of second mating parts 211a and 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 portions facing each other, i.e., as a pair of inner guide rails, and the pair of second guide portions facing away from each other, i.e., as an outer guide rail. Correspondingly, the pair of first mating portions are arranged as an outer guide groove, and the pair of second mating portions are arranged as a pair of inner guide grooves; or both the pair of first guide portions and the pair of second guide portions are arranged as an outer guide rail, and correspondingly, both the pair of first mating portions and the pair of second mating portions are arranged as a pair of inner guide grooves; or both the pair of first guide portions and the pair of second guide portions are arranged as a pair of inner guide rails, and correspondingly, both the pair of first mating portions and the pair of second mating portions are arranged as an outer guide groove. This application does not limit the arrangement of the first guide portions, second guide portions, first mating portions, and second mating portions.

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

[0175] Furthermore, the lawnmower 110 also includes a first support portion 130 and a second support portion 131, a pair of first guide portions 111a and 111b including a pair of first extension portions 111a1 and 111b1 extending along a first sliding direction A1, and a pair of second guide portions 113a and 113b including a pair of second extension portions 113a1 and 113b1 extending along a third sliding direction A3. The first extension portion 111a1 protrudes from the outside of the first support portion 130 in the width direction, the first extension portion 111b1 protrudes from the outside of the second support portion 131 in the width direction B, the second extension portion 113a1 protrudes from the inside of the first support portion 130 in the width direction B, and the second extension portion 113b1 protrudes from the inside of the second support portion 131 in the width direction.

[0176] In other words, one of the first extensions 111a1 and one of the second extensions 113a1 share the first support portion 130, and the other of the first extensions 111b1 and one of the second extensions 113b1 share the second support portion 131. This arrangement allows for a compact layout of the first tool interface, thereby reducing the space occupied by the first tool interface and thus reducing the size 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 also includes the outer side wall 132 of the first support portion 130, and the first guide portion 111b also includes the outer side wall 133 of the second support portion 131. Correspondingly, as... Figure 7 As shown, the first mating portion 201a includes an inner sidewall (not shown) that mates with the first extension 111a, and a first contact portion 201a1 that mates with the outer sidewall 132. The first mating portion 201b includes an inner sidewall (not shown) that mates with the first extension 111b, and a first contact portion 201b1 that mates with the outer sidewall 133. Thus, when the backpack battery pack 200 is slidably mated with the lawnmower 110 along the first sliding direction A1, the first extension 111a1, the outer sidewall 132, the second extension 111b1, and the outer sidewall 133 together constitute a guide and limit for the backpack battery pack 200.

[0179] Similarly, the second guide portion 113a also includes the inner sidewall 134 of the first support portion 130, and the second guide portion 113b also includes the inner sidewall 135 of the second support portion 131. Correspondingly, as Figure 10 As shown, the second mating part 211a includes an outer wall 212 that mates with the second extension 113a1, and a second contact part 211a1 that mates with the inner wall 134. The second mating part 211b includes an outer wall 213 that mates with the second extension 113b1, and a second contact part 211b1 that mates with the inner wall 134. Thus, when the handheld battery pack 210 is slidably mated to the lawnmower 110 along the second sliding direction A2, the second extension 113a1, the inner wall 134, the second extension 113b1, and the inner wall 135 together constitute a guide and limit for the handheld battery pack 210.

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

[0181] It should be noted that the first tool electrode, the backpack battery pack electrode, and the handheld battery pack electrode can be configured in any form that is easily conceived by those skilled in the art, and will not be described in detail here.

[0182] Both backpack and handheld battery packs can be connected to the first tool electrode, making the structure simple and compact, which is conducive to the miniaturization of the first type of power tool.

[0183] The lawnmower 110 is provided with a terminal block 115, and the first tool electrode 111c is at least partially mounted on the terminal block 115. Correspondingly, as... Figure 7 As shown, the backpack battery pack 200 has a plurality of first terminal slots 205 located between a pair of first mating portions 201a, 201b, and each battery pack electrode is at least partially housed in the corresponding first terminal slot 205; Figure 10As shown, the handheld battery pack 210 is provided with a plurality of second terminal slots 215 located between a pair of second mating portions 211a, 211b, and each handheld battery pack electrode is at least partially housed in the corresponding second terminal slot 215.

[0184] like Figure 6 As shown, the lawnmower 110 also includes a locking element 150 located between a pair of second guide portions 113a, 113b, corresponding to, as Figure 7 As shown, the backpack battery pack 200 includes a first locking portion 250 located between a pair of first mating portions 201a, 201b, as... Figure 10 As shown, the handheld battery pack 210 includes a second locking part 260 located between a pair of second mating parts 211a, 211b. When the backpack battery pack 200 is mated with the lawnmower 110, the locking member 150 engages with the first locking part 250 to lock the backpack battery pack 200 and the lawnmower 110; when the handheld battery pack 210 is mated with the lawnmower 110, the locking member 150 engages with the second locking part 260 to lock the handheld battery pack 210 and the lawnmower 110.

[0185] When used with Type I power tools, the backpack battery pack and the handheld battery pack can share the locking element 150, which makes the structure simple and compact, and facilitates the miniaturization of Type I power tools.

[0186] In this embodiment, the locking member 150 is configured as a snap fastener, and the first locking part 250 and the second locking part 350 are configured as slots that cooperate with the snap fastener. Of course, the locking member, the first locking part, and the second locking part can also be configured in other forms, such as the locking member being configured as a slot, and the first locking part and the second locking part being configured as a snap fastener that cooperates with the slot. This application does not limit this.

[0187] Furthermore, such as Figure 5 As shown, the lawnmower 110 also includes a trigger 151, which drives the locking member 150 from a locked position to an unlocked position. When the locking member 150 is in the locked position, it engages with the first locking part 250 or the second locking part 350 to lock the lawnmower 110 to the backpack battery pack 200 or the handheld battery pack 210. When the locking member 150 is in the unlocked position, it disengages from the first locking part 250 or the second locking part 260, and the lawnmower 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 installed on the lawnmower 110, so the user does not need to carry the battery pack when the lawnmower 110 is working.

[0189] In other embodiments, when the first type of power tool is in operation, the user needs to carry the battery pack on their back for ease of use and portability. Taking the installation of the backpack battery pack 200 and the backpack hair dryer 120 as an example, as... Figure 11 As shown, the backpack hair dryer 120 also includes a main body 122 and a back frame 125 connected to the main body. The back frame 125 is configured for a user to carry the backpack hair dryer 120 on their back. The backpack battery pack 120 is configured to be detachably mounted to the back frame 125 so that the backpack battery pack 200 can power the backpack hair dryer 120.

[0190] Specifically, the back frame 125 is located at one end of the main body 122 and is detachably 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 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, which is located 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, so that the user can carry the backpack hair dryer 120 by the back frame 125. The battery pack is supported by the user's back and / or waist, reducing the strain on the user's hands and making the user more comfortable to use.

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

[0192] Specifically, the construction of the first tool interface 121 can refer to the construction of the first tool interface 141, and the construction of the third tool interface 123 can refer to the construction of the third tool interface 113, which will not be repeated here.

[0193] Furthermore, in order to achieve a compact back frame structure, the positional relationship between the first tool interface 121 and the third tool interface 123 is the same as that 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, to which a handheld battery pack is configured to be detachably mounted, enabling the handheld battery pack to power the second type of power tool. In some embodiments, such as Figure 12As shown, the second type of power tool system 12 includes three types of second type power tools: a handheld hair dryer 130, a lawn mower 140, and a pruning machine 150. The handheld hair dryer 130 includes a second tool interface 131, the lawn mower 140 includes a second tool interface 141, and the pruning machine 150 includes a second tool interface 151. The second tool interfaces 131, 141, and 151 have 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] Taking the installation of the handheld battery pack 210 and the lawn mower 140 as an example, such as Figure 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. The second guide portions 141a and 141b are used to guide the handheld battery pack 210 to slide onto the lawn mower 140 along the second sliding direction A2. Of course, the handheld battery pack 210 can also be slidably removed from the lawn mower 140 in the opposite direction to the second sliding direction A2.

[0196] The construction of the second tool interface 141 is basically the same as that of the third tool interface 113, and will not be described again here. Correspondingly, as... Figure 10 As shown, a pair of second mating parts 211a and 211b are used to cooperate with a pair of second guide parts 141a and 141b respectively to realize the installation of the lawn mower 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 can also be other forms of connection, as long as they can meet the connection requirements between the battery pack and the power tool.

[0198] Furthermore, the second tool interface also includes several second-type power tool electrodes for electrical connection with a handheld battery pack. Taking the lawnmower 140 as an example, the second tool interface 141 includes several second-type power tool electrodes 141c, which are located between a pair of second guide portions 141a and 141b in a direction perpendicular to the second sliding direction A2. Correspondingly, a handheld battery pack electrode (not shown) is used to connect with the second-type power tool electrodes 141c, thereby realizing the electrical connection between the handheld battery pack and the second-type power tool.

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

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

[0201] In some embodiments, to meet the needs of users who prefer to carry the battery pack on their backs, the handheld battery pack can also power a second type of power tool via a carrying device. For example... Figure 16 As shown, both handheld battery packs 210 and 210' can power the handheld hair dryer 130, lawn mower 140, and pruning machine 150 via the carrying device 600. Taking the handheld battery pack 210 powering the lawn mower 140 via the carrying device 600 as an example... Figure 15 As shown, the carrying device 600 includes a second carrying interface 640, which is configured to detachably mount a handheld battery pack 210. A connector 620 is configured to detachably connect to a second tool interface 640. When the lawnmower 140 is connected to the connector 620 and the handheld battery pack 210 is mounted to the second carrying interface 640, the handheld battery pack 210 powers the lawnmower 140. The construction of the second carrying interface 640 is substantially the same as that of the second tool interface 141, and will not be described further here. By providing a first carrying interface for mounting a backpack battery pack and a second carrying interface for mounting a handheld battery pack on the carrying device, the need for an additional carrying device is eliminated, saving costs and reducing carrying burden.

[0202] Furthermore, in order to achieve a compact carrying device structure, the positional relationship between the first carrying interface 630 and the second carrying interface 640 is the same as that 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 quite heavy, directly attaching the battery pack to the power tool would be too much of a burden for the user. By using a carrying device, the battery pack can be detachably installed on the carrying device, making it more convenient and less strenuous for the user during work.

[0204] To make the working system as lightweight as possible while still meeting the requirement that the backpack battery pack can be carried and used, 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, such as 5Kg, 8Kg, 10Kg or others.

[0205] Similarly, to avoid excessive size affecting use and portability, 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 earlier, backpack battery packs not only need to be used as tool bags to power power tools, but also as energy storage packs to power handheld battery packs. The following details the usage requirements of backpack battery packs as energy storage packs.

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

[0208] Because backpack battery packs should not be too heavy and require sufficient charge, they need to store a sufficient amount of charge per unit weight. In some embodiments, the rated capacity to weight ratio of a single backpack battery pack is set in the range of 60-300 Wh / kg. Optionally, the rated capacity to weight ratio of a single backpack battery pack is set in the range of 80-200 Wh / kg, for example, 80 Wh / kg, 100 Wh / kg, 200 Wh / kg, or others.

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

[0210] As mentioned earlier, because the operating system needs to meet power supply requirements for extended periods, the handheld battery pack needs to be fully charged as quickly as possible after its power is depleted for repeated use. To enable rapid charging of the handheld battery pack, the backpack battery pack needs to provide a higher output power. However, due to technological and weight limitations, the backpack battery pack has a limited storage capacity. Since the discharge rate of a battery pack is the ratio of its output power to its rated capacity, meaning that a higher output power necessitates a higher discharge rate, the backpack battery pack needs to discharge the handheld battery pack at a higher 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 charge handheld battery packs needs to have a large output power to support charging the handheld battery pack at a high discharge rate. In some embodiments, the maximum output power of the backpack battery pack is greater than or equal to 2 kW. Optionally, the maximum output power of the backpack battery pack is set to 2-3.5 kW, such as 2 kW, 2.5 kW, 3 kW, 3.5 kW, or others.

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

[0213] Furthermore, the continuous discharge rate of the backpack battery pack is no less than 1C, meaning that the discharge rate is no less than 1C throughout the continuous discharge process from a remaining capacity of 90% or more to a remaining capacity of at least 10%. Therefore, the backpack battery pack can support higher output power, enabling rapid charging of handheld battery packs.

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

[0215] In practical applications, backpack battery packs are used far more often as energy storage devices than as tool kits. Therefore, the ability to be repeatedly used is not a primary requirement. In other words, the real-time charging requirements for backpack battery packs are relatively low. Thus, in some embodiments, the charging rate of individual cells in the backpack battery pack can be set lower, thereby reducing the cost of individual cells. For example, setting the charging rate of individual cells in the backpack battery pack to be lower than that in a handheld battery pack allows the two types of cells to be used in combination, resulting in a lower overall cell cost for the power supply system. Optionally, the charging rate of individual cells in the backpack battery pack can range from 0.2C to 1C; for example, the charging rate of individual cells in the backpack battery pack can be set to 0.75C.

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

[0217] To meet operational requirements, the capacity of each individual cell in the backpack battery pack is no less than 4AH. In some embodiments, the capacity of each individual cell in the backpack battery pack is 5AH, and the number of individual cells in the backpack battery pack is 75. The rated voltage of each individual cell is 3.6V. By connecting 5 individual cells in parallel to form a cell string, and then connecting 15 cell strings in series, a 54V output is achieved.

[0218] As mentioned earlier, handheld battery packs need to be used frequently as tool kits, and their power needs to be fully charged as soon as possible for repeated use. The following details how handheld battery packs meet the requirements for repeated use.

[0219] To enable uninterrupted use of the handheld battery pack, the time required to charge it from a depleted state to a full charge is shorter than the time required to discharge it from a full charge to a depleted state. In some embodiments, the average charging power of the DC charging device on the handheld battery pack is greater than the average discharging power of the second type of power tool on the handheld battery pack. It should be noted that "depleted state" refers to a remaining charge of less than or equal to 5%, and "full charge" refers to a remaining charge of greater than or equal to 95%.

[0220] To improve the charging speed of handheld battery packs, individual battery cells with a high charging rate can be configured, enabling the handheld battery pack to perform high-rate charging. In one embodiment, the maximum permissible charging rate of an individual battery cell in the handheld battery pack is not less than 7C. Optionally, the maximum permissible charging rate of an individual battery cell in the handheld battery pack is set to 7-12C, such as 7C, 10C, 12C, or others.

[0221] In addition, to meet the power supply requirements of high-power power tools, handheld battery packs also need to be equipped with individual battery cells with a high discharge rate, enabling the handheld battery pack to discharge at a high rate. In some embodiments, the discharge rate of the individual battery cells in the handheld battery pack is not less than 5C. Optionally, the discharge rate of the individual battery 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 a 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 relatively high, for example, not less than 40V. In some embodiments, the rated voltage of the handheld battery pack is also set to 54V. With a fixed discharge rate, designing a higher rated voltage for the handheld battery pack can increase its discharge power, thereby enabling the power tool to operate at higher power.

[0223] The maximum charge-discharge cycle life of commercially available high-capacity battery packs is generally below 1000 cycles, with common high-capacity battery packs having a maximum charge-discharge cycle life of 300-500 cycles. A low charge-discharge cycle life results in a shorter battery pack lifespan, requiring frequent replacements, which undoubtedly increases the operating cost of the system. For example, in garden maintenance, if a high-capacity battery pack with a maximum charge-discharge cycle life of 300-500 is used, a new battery pack will need to be purchased after only a few months, which obviously leads to higher operating system costs.

[0224] To address the aforementioned issues, in some embodiments, the maximum charge-discharge cycle life of a single cell in the handheld battery pack is designed to be no less than 1000 cycles to ensure the lifespan of the handheld battery pack. Even if a battery pack needs to complete 3 charge-discharge cycles per day, 1000 charge-discharge cycles can still extend the battery pack's lifespan to one year, thus meeting the needs of landscaping teams.

[0225] In some embodiments, assuming the time required for a single handheld battery pack to charge from an empty state to a fully charged state is t1, and the time required for a single handheld battery pack to discharge from a fully charged state to an empty state is t2, then t1 ≤ t2. This allows users to use the handheld battery pack uninterruptedly, thereby improving work efficiency. Further, assuming the waiting time for a single handheld battery pack to enter the discharge state after charging is t3, and the waiting time for a single handheld battery pack to enter the 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, it may be necessary to wait for the temperature of the handheld battery pack 210 to drop before initiating the discharge process, hence the waiting time t3. If the temperature of the handheld battery pack is too high after discharging, it may be necessary to wait for the temperature of the handheld battery pack to drop before initiating the charging process, hence the waiting time t4. Additionally, if a robust thermal management system is implemented during the charging process, t3 can be 0, meaning the user does not need to wait, and the handheld battery pack can directly discharge after charging. If a robust thermal management system is employed during the discharge process, t4 can be 0, meaning the user does not need to wait and the handheld battery pack can be charged directly after discharge.

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

[0227] Typically, the temperature rise characteristics of a battery pack are determined by the following factors. Firstly, internal resistance is one of the important factors affecting 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 3 mΩ. Optionally, the internal resistance of a single cell in a handheld battery pack ranges from 1.8 mΩ to 3 mΩ, for example, 1.9 mΩ, 2 mΩ, 2.2 mΩ, and 2.6 mΩ. Because the internal resistance of a single cell in a handheld battery pack is relatively small, the temperature rise of a 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 a single battery cell also affects the temperature rise characteristics of the battery pack. In one embodiment, the single battery cells in a handheld battery pack are configured as sheet-like cells. The sheet-like design can increase the heat dissipation area of ​​the single battery cell and prevent the internal temperature of the single battery cell from rising during charging and discharging.

[0229] Thirdly, the thermal management system installed inside the battery pack also affects its temperature rise characteristics. The thermal management system regulates the battery pack's temperature, allowing it to operate normally under both high and low ambient temperatures. For example, the thermal management system may include heating and / or cooling devices. Heating devices can heat the battery pack at lower ambient temperatures, preventing it from failing to start charging and discharging due to excessively low temperatures, thus enabling it to begin charging and discharging immediately in cold weather. Cooling devices can, to some extent, prevent the battery pack from overheating, allowing it to begin charging and discharging even in high-temperature environments.

[0230] During high-rate charging, the large charging current of the handheld battery pack can lead to overheating if its temperature is not controlled. Overheating can cause several problems: First, if the battery pack temperature exceeds a preset threshold, the DC charger may enter a charging protection state, forcing a complete halt to charging. Second, as mentioned earlier, if the battery pack remains hot after charging, the discharge process may not begin until it cools down. Additionally, in low-temperature environments (such as outdoors in cold weather), the battery pack may become too cold, preventing immediate charging or discharging. All of these issues can cause intermittent charging by the DC charger.

[0231] The handheld battery packs described in the above embodiments overcome the drawback of large temperature rise caused by high-current charging and discharging in existing technologies. The temperature change of the battery pack is relatively small after high-current charging and discharging; therefore, the battery pack can be discharged directly after being fully charged without waiting for cooling, and can be recharged directly after discharging without waiting for cooling. This reduces the waiting time for power tools, further improving their working efficiency. Furthermore, due to the short charging time of the handheld battery packs, a limited number of handheld battery packs can be used for alternating charging to power the power tool system, thereby reducing the operating cost of the power tool system.

[0232] To make the entire system lightweight and portable, in some embodiments, the weight of a single handheld battery pack is set to range from 1 to 3.5 kg. Alternatively, the weight of a single handheld battery pack 210 is set to 1.5 to 3 kg, such as 1.5 kg, 2 kg, 3 kg, or others.

[0233] As mentioned earlier, the working system needs to meet the requirements of lightweight and portable use. Simultaneously, the backpack battery pack within the system needs to fulfill the characteristics of an energy storage pack, while the handheld battery pack needs to be capable of rapid cycle use. Therefore, in some embodiments, the rated capacity-to-weight ratio of the backpack battery pack ranges from 60-300Wh / Kg, and the maximum allowable charging rate of the handheld battery pack is not less than 7C. With this configuration, the backpack battery pack is lightweight yet has sufficient power, achieving both portability and the ability to fully charge the handheld battery pack. Furthermore, the handheld battery pack's charging rate supports fast charging, thus meeting the requirement for rapid cycle use. Optionally, the rated capacity-to-weight ratio of a single backpack battery pack is set to a range of 80-200Wh / Kg, for example, 80Wh / Kg, 100Wh / Kg, 200Wh / Kg, or others; optionally, the maximum allowable charging rate of a single cell in the handheld battery pack is set to 7-12C, for example, 7C, 10C, 12C, or others.

[0234] Furthermore, 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 high-current discharge, meeting its requirement as an energy storage pack to charge the handheld battery 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, enabling the handheld battery pack to achieve fast charging and thus meet the requirements for cyclic use. 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, the temperature rise of the handheld battery pack does not exceed 14°C at an ambient temperature of around 20°C; and / or when the handheld battery pack is charged at a 5C rate, the temperature rise of the handheld battery pack does not exceed 19°C at an ambient temperature of around 20°C; and when the handheld battery pack is charged at a 10C rate, the temperature rise of the handheld battery pack does not exceed 24°C at an ambient temperature of around 25°C. In some embodiments, the internal resistance of a single cell in the handheld battery pack is less than or equal to 3mΩ. Optionally, the internal resistance of a single cell in the handheld battery pack ranges from 1.8mΩ to 3mΩ, for example, 1.9mΩ, 2mΩ, 2.2mΩ, or 2.6mΩ.

[0235] To better meet the need for the backpack battery pack to fully charge the handheld battery pack, the rated capacity of the backpack battery pack needs to be greater than that 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. This allows one backpack battery pack to fully charge at least two handheld battery packs, effectively alleviating users' battery anxiety. Further, the ratio of the first capacity to the second capacity ranges from 3 to 15. Since the backpack battery pack stores significantly more power than the handheld battery pack, carrying the backpack battery pack can replenish the power of multiple handheld battery packs. Optionally, the ratio of the first capacity to the second capacity can be 3, 4, 5, 7, 10, 12, or other values.

[0236] It should be noted that "first power level and 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] To better meet the need for the backpack battery pack to fully charge the handheld battery pack, the rated capacity of the backpack battery pack needs to be greater than that 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] Furthermore, the ratio of the first capacity to the second capacity ranges from 3 to 15. Optionally, the ratio of the first capacity to the second capacity can be 3, 4, 5, 7, 10, 12, etc. With this configuration, one backpack battery pack can fully charge multiple handheld battery packs, effectively alleviating users' power anxiety.

[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 and second capacities are too large, the size and weight of the backpack and handheld battery packs also increase accordingly, making them inconvenient to carry and use. When the first and second capacities are too small, they cannot meet the power needs of the landscaping 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 a backpack battery pack is also greater than that of a handheld battery pack. Therefore, as Figure 4 As shown, the backpack battery pack can be mounted on a Type II power tool to power it, eliminating the need for the user to directly bear the weight of the backpack battery pack 200. Figure 12As shown, a handheld battery pack can be mounted on a Type I power tool to power it. Of course, as mentioned above, a backpack battery pack can also power a power tool by connecting to a carrying device. This allows users to carry the backpack battery pack for convenient use. To facilitate the handling, carrying, and use of backpack and handheld battery packs by work teams, in one embodiment, the weight range of a single backpack battery pack is 4-12 kg, and / or the weight range of a single handheld battery pack is 1-3.5 kg.

[0242] In some embodiments, the weight ratio of a single backpack battery pack to a single handheld battery pack is greater than 1. Furthermore, to prevent the DC charging device from tipping over when the backpack and handheld battery packs are mounted on it, 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 that of the handheld battery pack. To avoid excessive size affecting the floor space, in some embodiments, the volume of a single backpack battery pack ranges from 3 to 20 L, and / or the volume of the handheld battery pack 210 ranges from 0.5 to 3 L. Optionally, the volume ratio of the backpack battery pack to the handheld battery pack is greater than 1. Further, 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 earlier, users need to select backpack battery packs with large capacity and light weight to meet their energy storage requirements. This places high demands on the energy density of backpack battery packs, while handheld battery packs have relatively lower energy density requirements. The energy density of a battery pack refers to the amount of electricity stored per unit mass / volume of the battery pack. In this application, the amount of electricity stored per unit mass of the battery pack is defined as the ratio of rated capacity to weight, and the amount of electricity stored per unit volume of the battery pack is defined as the ratio of rated capacity to volume. In some embodiments, the rated capacity to weight ratio of a backpack battery pack is greater than that of a handheld battery pack. Optionally, the range of the rated capacity to weight ratio for a backpack battery pack is 60-300 Wh / kg, and / or the range of the rated capacity to weight ratio for a handheld battery pack is 60-300 Wh / kg. The rated capacity to volume ratio of backpack battery packs ranges from 40 to 220 Wh / L, and / or the rated capacity to volume ratio of handheld battery packs ranges from 60 to 220 Wh / L.

[0245] Because handheld battery packs need to meet the requirements of cyclic use, in some embodiments, the maximum permissible charging rate of a handheld battery pack is greater than that of a backpack battery pack.

[0246] Similarly, to meet the requirements of cyclical use, the charging wait time for handheld battery packs needs to be shorter than that for backpack battery packs. Therefore, in some embodiments, under the same charging rate conditions, the temperature rise of a handheld battery pack is less than that of a backpack battery pack.

[0247] Furthermore, 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 less than that of a single cell in a backpack battery pack.

[0248] In some embodiments, the individual cells in the backpack battery pack are different from those in the handheld battery pack. Those skilled in the art can select the individual cells in the backpack battery pack and the handheld battery pack as needed. For example, both the individual cells in the backpack battery pack and the individual cells in the handheld battery pack may be pouch cells; or, the individual cells in the backpack battery pack may be pouch cells, and the individual cells in the handheld battery pack may be cylindrical cells; or, both the individual cells in the backpack battery pack and the individual cells in the handheld battery pack may be cylindrical cells. This application does not impose any limitations on these options.

[0249] In practical applications, backpack battery packs are primarily used as energy storage units to power handheld battery packs. Users rarely need to directly bear the weight of the backpack battery pack, therefore, the weight requirements for backpack battery packs are relatively lower compared to handheld battery packs. Thus, taking the example of a backpack battery pack 200' charging a handheld battery pack 210, the backpack battery pack 200' uses relatively heavy 21700 cylindrical cells, while the handheld battery pack 210 uses relatively lightweight pouch cells, thereby reducing the cost per cell.

[0250] As mentioned earlier, compared to backpack battery packs, handheld battery packs are more portable and inexpensive, making them a preferred power source for gardening work teams. To ensure the handheld battery packs have a continuous power supply for extended work periods, work system 1 also provides an energy supply system. This system includes a DC charging device to convert power from the backpack battery pack and supply it to the handheld battery pack, thus continuously meeting its power needs.

[0251] The DC charging device includes at least one input interface and at least one output interface. The input interface is configured to detachably mount a backpack battery pack, and the output interface is configured to removably connect to a handheld battery pack. The DC charging device also includes at least one DC charging module configured to convert and transfer electrical energy from the backpack battery pack to the handheld battery pack, thereby enabling the backpack battery pack to charge the handheld battery pack.

[0252] In some embodiments, please refer to Figures 17 to 18 The DC charging device 300 includes a housing 301, which 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] To facilitate user handling, a grip portion 302 is provided on the housing 301. Optionally, the grip portion 302 is configured as a handle. Furthermore, the grip portion 302 is pivotally connected to the housing 301, and the grip portion 302 can be flipped upwards for the user to hold upright, or flipped downwards for storage on the housing 301.

[0254] The DC charging device 300 includes an input interface 310 and an output interface 320, which are arranged opposite each other along the width direction perpendicular to the height direction c. The opposite arrangement of the input interface 310 and the output interface 320 makes efficient use of the space in the DC charging device 300 and also helps maintain the balance of the DC charging device 300, preventing it from tipping over.

[0255] In this embodiment, there is one input interface and one output interface. In other embodiments, the number of input interfaces and output interfaces may be different, such as two, three, four, or six, etc., which are not specifically limited here and are determined according to the actual situation.

[0256] The number of input and output interfaces can be the same or different. Taking one input interface and two output interfaces as an example, the input interface is located on one side of the DC charging device, and the two output interfaces are located on the other side. In this way, the backpack battery pack can charge two handheld battery packs simultaneously or sequentially.

[0257] Taking the mounting of a backpack battery pack 200 and a handheld battery pack 210 onto a DC charging device 300 as an example, the input interface 310 includes a pair of first connecting portions 311 extending along a first sliding direction, for connecting with a pair of first mating portions 201a and 201b, for guiding the backpack battery pack 200 to slide onto or detach from the DC charging device 300 along the first sliding direction. The output interface 320 includes a pair of second connecting portions 321 extending along a second sliding direction, for connecting with a pair of second mating portions 211a and 211b, for guiding the handheld battery pack 210 and the DC charging device 300 to slide onto or detach along the second sliding direction. The structures 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, both parallel to the height direction c, and the dimension of the first connecting portion 311 along the height direction c is larger than the dimension of the second connecting portion 321 along the height direction c.

[0258] In this embodiment, the input interface 310 has a basically the same structure as the aforementioned first tool interface 111, and the output interface 320 has a basically the same structure as the aforementioned second tool interface 141. That is, a pair of first connecting parts 311 are configured as an external slide rail, and a pair of second connecting parts 321 are configured as a pair of internal slide rails.

[0259] Of course, those skilled in the art will readily realize that the first and second connecting parts can also be configured in other forms. This 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 to each other.

[0260] In this embodiment, the insertion / removal direction of the backpack battery pack 200 and the DC charging device 300 is parallel to the insertion / removal direction of the handheld battery pack 210 and the DC charging device 300. Here, the insertion / removal direction refers to the mounting direction of the battery pack onto the DC charging device and the direction in which the battery pack is detached from the DC charging device. Specifically, the insertion / removal direction is parallel to the height direction c. The backpack battery pack 200 moves along a pair of first connecting portions 311 from top to bottom in the height direction (e.g., ...). Figure 19 The backpack battery pack 200 can be mounted to the DC charging device 300 by sliding along a pair of second connecting portions 321 from top to bottom in the height direction; the handheld battery pack 210 can be mounted to the DC charging device 300 by sliding along a pair of first connecting portions 311 from bottom to top in the height direction. Figure 19 Sliding along the direction shown (c2) allows the backpack battery pack 200 to be detached from the DC charging device 300; sliding the handheld battery pack 210 along a pair of second connecting portions 321 from bottom to top in the height direction allows the handheld battery pack 210 to be detached from the DC charging device 300.

[0261] For further details, please refer to Figure 17 The input interface 310 also includes a plurality of first charging electrodes 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, enabling communication 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. Specifically, the differential communication can be CAN (Controller Area Network) communication.

[0262] Correspondingly, the 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. Specifically, the differential communication can be CAN communication.

[0263] Please refer to Figure 18 The output interface 320 also includes a plurality of second charging electrodes 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, enabling communication 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. Specifically, the differential communication can be CAN (Controller Area 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 third digital signal communication contact uses serial communication, and the fourth digital signal communication contact uses differential communication. Specifically, the differential communication can be CAN communication.

[0265] Specifically, when the backpack battery pack 200 is installed into the DC charging device 300, the first positive electrode 321, the first negative electrode 322, the first analog signal communication electrode 323, the first digital signal communication electrode 324, and the second digital signal communication electrode 325 are respectively connected to 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 electrode 323, and then conducts digital signal communication with the backpack battery pack 200 through the second digital signal communication electrode 325. When the communication is successful, the DC charging device 300 recognizes that the backpack battery pack 200 is a direct-plug connection.

[0266] Similarly, when the handheld battery pack 210 is installed into the DC charging device 300, the second positive electrode 331, the second negative electrode 332, the second analog signal communication electrode 333, the third digital signal communication electrode 334, and the fourth digital signal communication electrode 335 are respectively connected to 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 333, and then conducts digital signal communication with the handheld battery pack 210 through the fourth digital signal communication electrode 335. When the communication is successful, the DC charging device 300 recognizes that the handheld battery pack 210 is a direct-plug connection.

[0267] Please refer to Figure 7 and Figure 17 The input interface 310 also includes a first locking member 312 located between a pair of first connecting portions 311. When the backpack battery pack 200 is installed to the DC charging device 300, the first locking member 312 engages with the first locking portion 250 of the backpack battery pack to lock the connection between the backpack battery pack 200 and the DC charging device 300. Please refer to... Figure 10 and Figure 18 The output interface 320 also includes a second locking member 322 located between the second connecting portions 321. When the handheld battery pack 210 is installed to 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 realizing the connection 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 a snap fastener, and the first locking portion 250 and the second locking portion 260 are configured as a slot that can cooperate with the snap fastener.

[0268] Furthermore, the DC charging device 300 also includes a first trigger 313, which can drive the first locking member 312 to move from the locked position to the unlocked position. When the first locking member 312 is in the locked position, the first locking member 312 cooperates with the first locking part 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 part 250, and the DC charging device 300 and the backpack battery pack 200 are unlocked. The DC charging device 300 also includes a second trigger 323, which can drive the second locking member 322 from a locked position to an unlocked position. When the second locking member 322 is in the locked position, it cooperates with the second locking part 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, it disengages from the second locking part 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 noted that the first locking member 312, the second locking member 322, the first locking part 250 and the second locking part 260 can also be configured in other forms, such as the first locking member 312 and the second locking member 322 being configured as slots, and the first locking part 250 and the second locking part 260 being configured as buckles that cooperate with the slots. This application does not limit this.

[0270] In other embodiments, since all backpack battery packs and all handheld battery packs in battery pack system 20 have the same interface construction, the backpack battery packs and handheld battery packs can also be other types of battery packs, such as... Figure 20 As shown, the input interface can be fitted with a backpack battery pack 200', and the output interface can be fitted with a handheld battery pack 210. Using the DC charging device 300, the backpack battery pack 200' can also provide power to the handheld battery pack 210.

[0271] The DC charging module 350 is configured to receive electrical energy from 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 within the housing 301. Please refer to... Figure 21The 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 DC-DC (Direct Current to 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 to charge the handheld battery pack 210. Typically, the DC charging module 350 is used for voltage conversion to convert the received voltage from the backpack battery pack 200 into an output voltage compatible with the handheld battery pack 210.

[0272] When the landscaping team is working outside during the day and AC power is unavailable, they can directly use the existing backpack battery packs in the battery pack system. By carrying the high-capacity backpack battery packs and using DC charging devices to charge the handheld battery packs, the landscaping team's power anxiety when working outside is solved.

[0273] To carry as much lightweight equipment as possible while meeting power requirements, one implementation method is illustrated by a two-person landscaping team consisting of worker A and worker B. The team carries a backpack battery pack, two handheld battery packs, and a DC charger, all fully charged the night before using AC power. Upon arrival at the work site, worker A and worker B each use one handheld battery pack equipped with the corresponding power tools (such as a handheld hair dryer, lawnmower, or pruning machine) to work. When either handheld battery pack runs low, it can be connected to the DC charger and recharged using the backpack battery pack. Once fully charged, it can be used continuously to meet the needs of continuous work. This effectively solves the power supply problem for the power tool system even in scenarios where there are no AC outlets at the work site.

[0274] It should be noted that, in order to meet the needs of more diverse work scenarios and longer working hours, the landscaping team can also carry multiple backpack battery packs. Since the backpack battery packs can power both power tools and handheld battery packs, the landscaping team can use some of the backpack battery packs as energy storage packs to power the handheld battery packs, and use the rest of the backpack battery packs as tool packs to power the power tools, so as to meet the work needs in different usage scenarios.

[0275] As a suggested implementation, let's take a two-person landscaping team consisting of worker A and worker B as an example. The team carries two backpack battery packs, three handheld battery packs, and a DC charging device, all fully charged by AC power the night before. Upon arriving at the work site, worker A first installs the backpack battery packs onto the automatic lawnmower for automatic mowing, and then uses one handheld battery pack to install on the lawn trimmer for trimming. Worker B uses one handheld battery pack to install on the pruning machine for pruning. When the two handheld battery packs run low on power, one of them can be installed on the DC charging device and charged using the spare backpack battery pack. Once fully charged, it can be used again, and the spare handheld battery pack can be used to replace the low-powered battery pack to meet the needs of continuous work.

[0276] As mentioned earlier, the landscape team usually travels to many work locations during the day, so the weight of the entire work system should not be too heavy, otherwise it will be difficult for the landscape team to move and carry it frequently during the work process.

[0277] In some embodiments, the battery pack system includes a backpack battery pack and two handheld battery packs, the power supply system includes a DC charging device, and the weight of the power supply system ranges from 16 to 31 kg. In some embodiments, the battery pack system includes two backpack battery packs and two handheld battery packs, the power supply system includes a DC charging device, and the weight of the power supply system ranges from 20 to 43 kg. In some embodiments, the battery pack system includes one backpack battery pack and one handheld battery pack, the power supply system includes a DC charging device, and the weight of the power supply system ranges from 15 to 27.5 kg. As an example, the battery pack system includes one backpack battery pack and two handheld battery packs, the power supply system includes a DC charging device, and the weight of the power supply system is 24 kg. The backpack battery pack weighs 8 kg, the handheld battery pack weighs 2 kg, and the DC charging device 300 weighs 12 kg.

[0278] On the one hand, since landscape teams typically work outdoors, it's difficult to find AC power sources. On the other hand, if AC power were to supply power to backpack and / or handheld battery packs, a power conversion module to convert AC to DC would need to be included in the DC charging device. This would significantly increase the weight and size of the DC charging device, making the system less compact and portable, thus hindering the work of landscape teams. In one embodiment, the DC charging device only has an input interface for receiving power input; in other words, the DC charging device does not have an AC input interface and / or other DC input interfaces.

[0279] Since handheld battery packs have a smaller rated capacity than backpack battery packs, there is usually no need for handheld battery packs to charge backpack battery packs in actual operation. 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 landscaping team to work continuously, the backpack battery pack needs to charge the handheld battery pack from empty to full in a short period of time.

[0281] However, traditional battery packs generally charge slowly. This slow charging speed is due to two main factors: firstly, the inherently poor performance of individual battery cells (such as the charging rate), and secondly, the limited charging power provided by the chargers. Currently, most chargers on the market draw power from AC outlets. However, for safety reasons, the power output of AC outlets is usually limited. For example, in North America, AC outlets are generally limited to 1.8 kW, and in Europe, they are generally limited to 3.6 kW. Because of these power limitations, chargers cannot provide high-power charging for battery packs. Once a large-capacity battery pack is depleted, it typically requires a long charging time (far exceeding the battery pack's maximum operating time).

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

[0283] In some embodiments, the first charging rate when the backpack battery pack charges the handheld battery pack is greater than or equal to the second charging rate when the mains 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 rate 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 rated capacity of the handheld battery pack. Similarly, the second charging rate of the mains power to the handheld battery pack is the ratio of the maximum output power of the mains power to the rated capacity of the handheld battery pack. Traditional chargers typically use mains power when charging handheld battery packs, and due to the power limitations of the mains power, the charging speed of the handheld battery pack is relatively slow. The backpack battery pack provided in this embodiment utilizes a DC energy storage module to charge the handheld battery pack, which can increase the charging power to the handheld battery pack, thus improving the charging speed.

[0285] Specifically, the backpack battery pack provides a charging power that enables a first charging rate greater than or equal to 2C, optionally at 3C, 4C, 5C, 7C, 10C, or 12C. In contrast, the mains power only supports a second charging rate between 1C and 2C for the handheld battery pack 210. Therefore, charging the handheld battery pack using the backpack battery pack is significantly faster than charging it using mains power.

[0286] When the first charging rate is set to 3C, the handheld battery pack can be charged from empty to fully charged in about 20 minutes. When the first charging rate is set to 5C, the handheld battery pack can be charged from empty to fully charged 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 less 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 1.8 kW; optionally, the maximum output power of the backpack battery pack is greater than or equal to 3 kW. For example, the maximum output power of the backpack battery pack is 3.6 kW, 4 kW, 5 kW, 6 kW, 7 kW, 10 kW, 12 kW, or others. The output power of the AC power supply is less than 1.8 kW.

[0289] By using a backpack battery pack to charge a handheld battery pack, the problems of limited charging power and slow charging speed caused by traditional chargers drawing power from a socket can be solved. The output power of the backpack battery pack is greater than that of the mains power, so when using the backpack battery pack to charge the handheld battery pack, its charging speed is also greater than that of charging the handheld battery pack with mains power.

[0290] In some embodiments, the DC charging device further includes a heating device (not shown) and / or a heat dissipation device for temperature control of the backpack battery pack and the handheld battery pack during charging and discharging, so that the backpack battery pack can continuously discharge and the handheld battery pack can continuously charge, and also ensure that the handheld battery pack can immediately start discharging the power tool after charging is completed.

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

[0292] See Figure 22 and Figure 23 ,in Figure 22 This is an internal structural diagram of the DC charging device 300 after removing the housing 301. A first air duct 381, corresponding to the input interface 310, is located 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 located 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 each other. The air inlet 381a of the first air duct 381 is connected to the first air inlet 380a, and the air inlet 382a of the second air duct 382 is connected to the second air inlet 380b. The air outlets 381b of the first air duct 381 and the air outlets 382b of the second air duct 382 are both located on the side of the housing 301 along the length direction a, and both are connected to the air outlet 301a located on the side of the housing 301 along the length direction a.

[0293] A first fan (not shown in the figure) is installed inside the first air duct 381, and the first fan is located inside the housing of the first air duct 381, corresponding to the air inlet 381a of the first air duct 381. A second fan 384 is installed in the second air duct 382, ​​and the second fan 384 is located outside the housing of the second air duct 382, ​​between the air inlet 382a and the air outlet 382b of the second air duct 382.

[0294] Taking the charging of the handheld battery pack 210 by the backpack battery pack 200 via the DC charging device 300 as an example, when both the backpack battery pack 200 and the handheld battery pack 210 are mounted on the DC charging device 300, as... Figure 7 and Figure 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 activated, and the airflow flows into the backpack battery pack 200 from the air inlet, cools the battery cells housed inside the backpack battery pack 200, and then flows out from the air outlet 270. It then flows into the air inlet 381a through the first air inlet 380 connected to the air outlet 270, passes through the housing of the first air duct 381, flows out of the first air duct 381 from the air outlet 381b, and flows out of the housing 301 from the air outlet 301a connected to the air outlet 381b. When cooling of the handheld battery pack 210 is required, the second fan 382 is activated. Airflow enters the handheld battery pack 210 from the air inlet (not shown) provided on the handheld battery pack 200, cools the battery cells housed inside the handheld battery pack 210, and then flows out from the air outlet 280 provided on the handheld battery pack 210. It then flows into the air inlet 382a through the second air inlet 380b connected to the air outlet 280, passes through the housing of the second air duct 382, ​​flows out from the second air duct 382b, and flows out of the housing 301 from the air outlet 301a connected to the air outlet 382b.

[0295] The DC charging device incorporates a first air duct and a second air duct to prevent the airflow from mixing between the backpack battery pack and the handheld battery pack, thus avoiding the convergence of hot and cold airflows and resulting in better cooling.

[0296] When the DC charging device 300 is operating, the electronic components housed inside the housing 301 generate significant heat and require cooling. The DC charging device 300 also includes a third air duct 383, which houses electronic components (not shown). The third air duct 383 is located 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 located on one side of the housing 301 along the length direction a, and the air outlet 383b of the third air duct 383 is connected to the air outlet 301b located on the other side of the housing 301 along the length direction a. Figure 21 and Figure 22 It can be seen that the first air duct 381, the second air duct 382 and the third air duct 383 all have air outlets from the same side.

[0297] The third air duct 383 can be equipped with multiple fans. In this example, the third air duct 383 is equipped with three fans: a third fan 385, a fourth fan 386, and a fifth fan (not shown in the figure). The third fan 385 and the fourth fan 386 are located on the same side, both at the air outlet 383b of the third air duct 383. The fifth fan is located 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 each fan passes through the center of the circle. The central axis of the fifth fan is perpendicular to the central axes of the third fan 385 and the fourth fan 386. Although the third air duct is equipped with multiple fans, the multiple fans do not need to work simultaneously when the DC charging device is powered on. Only one or two fans can be turned on, or all three fans can be turned on simultaneously.

[0298] The aforementioned DC charging device, by setting up multiple independent air ducts and fans, can dissipate heat from different battery packs and electronic components separately during charging, so that cold and hot airflows do not converge, thus improving heat dissipation efficiency.

[0299] When the landscaping team is not working at night, AC power is needed to charge the backpack and handheld battery packs, allowing the team to carry fully charged packs when working outdoors. Therefore, the energy supply system also includes at least one AC charging device, comprising at least one charging interface and at least one AC charging module. The charging interface is configured to detachably mount the backpack and / or handheld battery packs, 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 and / or handheld battery packs.

[0300] The energy supply system includes both DC and AC charging devices, allowing work teams to carry only the DC charging device during the day, using a backpack battery pack as an energy storage unit to power handheld battery packs for extended work hours. After returning home in the evening, they can use the AC charging device to recharge the backpack and / or handheld battery packs to meet the power needs for the next day's work. This setup allows work teams to easily carry and transport equipment without needing to carry excessive equipment during the day.

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

[0302] To make the AC charging device more universal, the charging interfaces are all capable of accommodating both backpack and handheld battery packs. In this embodiment, charging interfaces 361a and 361b have the same structure, meaning that both charging interfaces 361a and 361b include the aforementioned first tool interface 111 and third tool interface 113. In other words, charging interfaces 361a and 361b both include the aforementioned input interface 310 and 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, and this application does not impose any limitations on this.

[0303] When both charging ports 361a and 361b of the AC charging device 360 ​​are equipped with battery packs (the battery packs can 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 connection order and remaining power of the two battery packs, and charges the battery packs according to the connection order and remaining power. The charging priority of the AC charging device 360 ​​for the battery packs is as follows: the connection order has a higher priority than the remaining power. That is, the AC charging device 360 ​​first determines the charging order of the battery packs based on the connection order; when the connection orders are the same, it then determines the charging order based on the remaining power. Specifically, when charging the battery packs, the AC charging device 360 ​​first charges the battery pack that was connected first, and then charges the battery pack that was connected later. When both battery packs are simultaneously plugged into the AC charging device 360, meaning the AC charging device 360 ​​is powered on only after both battery packs are plugged in, the AC charging device 360 ​​obtains the remaining power of the two battery packs and prioritizes charging the battery pack with the larger remaining power. After the battery pack with the larger remaining power is fully charged, the battery pack with the smaller remaining power is then charged. If the two battery packs have the same remaining power, the AC charging device 360 ​​randomly selects one of the battery packs to charge.

[0304] After the AC charging device 360 ​​is connected to mains power, the operator installs an empty battery pack into the AC charging device 360. The AC charging device 360 ​​charges the battery packs according to the installation order. Optionally, the battery pack inserted into the AC charging device 360 ​​first is charged first. For example, after the AC charging device 360 ​​is powered on, if a battery pack is installed on charging port 361a first, the AC charging device 360 ​​will charge the battery pack on charging port 361a first. If the operator installs a battery pack on charging port 361b while the battery pack on charging port 361a is charging, the charger will fully charge the battery pack on charging port 361a before charging the battery pack on charging port 361b.

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

[0306] Because garden maintenance requires a large number of backpack and handheld battery packs, the work team needs to fully charge many battery packs overnight. Since the number of charging ports on the AC charging equipment is limited, the energy supply system also includes a charging cabinet to meet the charging needs of the large number of battery packs. The charging cabinet includes at least one charging cabinet interface and at least one charging module. The charging cabinet interface is used to removably connect to the backpack and / or handheld battery packs, and the charging module is used to connect to the charging interface and transfer the electrical energy output from the charging interface to the charging cabinet interface, thereby enabling the charging of the backpack and / or handheld battery packs.

[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 goes home at night, they can use the AC charging device and the charging cabinet to recharge the battery packs in the system that are low on power to meet the work needs of the next day.

[0308] It is important to note that when the charging cabinet is connected to an AC charging device, the charging module receives DC power from the AC charging device, converts it to DC power, and then transmits it to the charging cabinet interface. Therefore, the charging module is a DC-to-DC power conversion module.

[0309] In some embodiments, such as Figure 25 As shown, the energy supply system 30 also includes a charging cabinet 370, which includes four charging cabinet interfaces 371: 371a, 371b, 371c, and 371d. Two charging cabinet interfaces 371a and 371b are arranged opposite to the other two charging cabinet interfaces 371c and 371d. Of course, the number of charging cabinet interfaces can also be six, eight, or other numbers; this application does not impose any restrictions on this.

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

[0311] The charging cabinet 370 also includes a cabinet body 377 and a cover 378. The cabinet body 377 encloses a storage space for accommodating backpack battery packs and / or handheld battery packs. The cover 378 can be operably opened or closed to accommodate the storage space. When closed, the backpack battery packs and / or handheld battery packs are protected by the charging cabinet 370 with waterproofing, dustproofing, and temperature control, thereby improving charging safety. Optionally, the cover 378 is pivotally connected to the cabinet body 377.

[0312] To enable power transmission, the energy supply system also includes a connection device. The charging cabinet has an input interface for receiving electrical energy output from the AC charging device. The connection device is configured to connect the charging interface and the input interface to transmit the electrical energy output from the charging interface to the charging cabinet. In some embodiments, such as Figure 26 As shown, the energy supply system 30 also includes a connection device 390, and the charging cabinet 370 includes an input interface 376. The connection device 390 is configured to connect the charging interface 361a and the input interface 376 to transmit the electrical energy output from the charging interface 361a to the charging cabinet 370.

[0313] One end of the charging interface 361a 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 361a, 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 limit this.

[0315] In this embodiment, the connecting device 390 is detachably connected to both the AC charging device 360 ​​and the charging cabinet 370. Specifically, the connecting 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 connection to the AC charging device 360 ​​or the charging cabinet 370. In this embodiment, the adapter interface 393a is configured with 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 with the same structure as the backpack battery pack interface, or with a cable head structure, and the charging interface or charging cabinet interface connected to the adapter interface can be configured with a plug type that matches the cable head; there are no limitations on this.

[0317] Furthermore, the connection device 390 also includes a cable head 391a connected to the other end of the cable 391, the cable head 391a being 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, such as Figure 27 In the circuit structure diagram of the provided charging cabinet 370, the charging cabinet 370 also includes a first management module 372 disposed 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. Therefore, it is necessary to send the various parameters of the charging cabinet 370 itself, namely the first electrical parameter information, to the AC charging device 360, and receive the communication information provided by the AC charging device 360, including various electrical parameters and control commands, so as to realize the management of the charging cabinet 370 based on this information.

[0320] In some embodiments, the first management module 372 is further configured to control at least one of the following based on the first electrical parameter information of the charging cabinet 370 itself and the communication information sent by the AC charging device 360: parameter acquisition 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 acquire various electrical parameters of the charging cabinet 370 in real time for further management and control based on these 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 a 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 for each module of the charging cabinet 370.

[0322] Optionally, the preset priority order includes at least the following: the slot order of charging cabinet interfaces 371a, 371b, 371c, and 371d; the battery pack insertion order; the battery pack capacity from high to low or low to high; the remaining battery charge from high to low or low to high; the charging time from long to short or short to long; the charging rate from high to low or low to high; and the battery pack temperature from high to low or low to high, etc. Specific settings can be configured according to actual needs and are not limited here. In particular, the priority order can also be set wirelessly via mobile devices for remote control.

[0323] In some embodiments, the charging cabinet 370 further includes a heating module (not shown), which is at least partially disposed within the cabinet body 377. Specifically, the heating module may be disposed on the side and / or bottom surface of the cabinet body 377 to raise the temperature inside the charging cabinet 370. The heating module includes various heating methods, such as direct heating of the air or heating of the heat sink. It is understood that when the charging cabinet 370 is working outdoors, or in cold winters, the extremely low temperature is not suitable for charging the battery pack, and the charging efficiency is extremely low. Therefore, a heating module needs to be installed inside the charging cabinet 370 to cope with the adverse effects of the low temperature environment.

[0324] Furthermore, a lower and upper limit threshold for charging low temperature are typically preset. This can be implemented through software or hardware. Hardware implementations include using a simple comparator or setting these thresholds within a hardware circuit. Software implementations involve presetting these thresholds in the first management module 372 and controlling heating based on a comparison between the thresholds and the actual temperature. For example, in the software implementation, the first management module 372 presets both the lower and upper limit thresholds for charging low temperature. The lower limit threshold is the lower condition requiring the heating module to be activated, and the upper limit threshold is the upper condition allowing the heating module to be stopped. Specifically, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 is lower than the lower limit threshold, it generates a heating command for the heating module, which then performs a heating operation. Conversely, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 is higher than the upper limit threshold, it generates a stop heating command for the heating module, which then performs a stop heating operation.

[0325] In some embodiments, the charging cabinet 370 is also equipped with a heating fan (not shown) used in conjunction with the heating module. When the heating module is activated, it can heat the heat sink on the inner side of the bottom of the cabinet 377. In order to achieve temperature uniformity within the cavity of the charging cabinet 370, a heating fan is usually used in conjunction with it. 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 inside the charging cabinet 370, thereby improving the heating efficiency and effect.

[0326] In some embodiments, the charging cabinet 370 further includes a cooling module (not shown), which is at least partially disposed within the cabinet to avoid risks of low charging efficiency and safety issues caused by excessively high ambient temperatures, excessively high battery pack temperatures during charging, or excessively high temperatures in the charging cabinet itself. Optionally, the charging cabinet 370 also includes a cooling fan (not shown) used in conjunction with the cooling module 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, a minimum charging high temperature threshold is typically preset. This can be implemented via software or hardware. Hardware implementations include using a simple comparator or setting the threshold within a hardware circuit. Software implementations involve presetting the threshold in the first management module 372 and controlling whether cooling is needed based on a comparison between the threshold and the actual temperature. For example, in the software implementation, the first management module 372 presets a minimum charging high temperature threshold, which serves as the lower limit condition for activating the heat dissipation module. Specifically, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 is higher than the minimum charging high temperature threshold, it generates a cooling command for the cooling module, which then performs a cooling operation in response.

[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 detected charging cabinet 370 is not higher than the cooling stop threshold, it generates a cooling stop command to the cooling module, and the cooling module responds to the cooling stop command and stops cooling.

[0329] In some embodiments, the cooling module can also stop in response to the activation of the heating module. That is, during the cooling operation, if the first management module 372 generates a heating command, indicating that cooling is no longer needed, a stop cooling command will be generated to stop the operation of the cooling module. It can be understood that the cooling module can perform the cooling operation in response to either the activation of the heating module or the achievement of a 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 and cooling modules operate using power supplied by the AC charging device 360. To avoid power loss to the battery packs to be charged in the charging cabinet 370, external power received from the charging cabinet 370 is preferentially used to power each module.

[0332] In some embodiments, such as Figure 25 As shown, the charging cabinet 370 also includes a display module 373. Optionally, the display module 373 can be located on the cover 378 or any other suitable location on the charging cabinet 370, without specific limitations.

[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, 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 packs connected to each charging cabinet interface 371a, 371b, 371c, and 371d, the continuous operating time of the charging cabinet 370 or the AC charging device 360, the date, temperature, communication status, cooling status, and heating status. The specific information displayed is not limited to these.

[0334] In some embodiments, the charging cabinet 370 further includes a locking module for unlocking and locking the cover 378 and the cabinet 377. The locking module allows the user to lock the charging cabinet 370 to provide protection against theft, rain, and fire during charging.

[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 typically includes a mechanical lock; the electric locking method typically includes an electrically locked lock.

[0336] Specifically, when the locking module uses a mechanical locking method, such as Figure 26 As shown, the locking module includes a first locking ring 378a disposed on the cover 378 and a second locking ring 377a disposed on the cabinet 377. When the lock passes through the first locking ring 378a and the second locking ring 377a and fastens, the cover 378 and the cabinet 377 are locked. Alternatively, when the locking module uses an electric locking method, the locking module responds to the 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 command 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 body 377 and the cover 378 based on the locking command.

[0338] In some embodiments, the charging cabinet 370 is also provided with a trigger key (not shown) for activating the charging cabinet 370 to perform further charging operations. When the trigger key is externally triggered, the charging cabinet 370 is activated and the display module 373 lights up simultaneously. The trigger key may be optionally located on the cabinet body 377 or the cover 378.

[0339] Specifically, the trigger key can respond to an external trigger by sending an activation signal to the first management module 372. In response to this activation signal, the first management module 372 detects the power supply status of the AC charging device 360 ​​connected to the charging cabinet 370. Correspondingly, if the first management module 372 determines that the power supply status indicates the AC charging device 360 ​​is allowed to output charging power to the charging cabinet 370, it controls the continuous output of a power supply signal to achieve 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 initially powered by one of the battery packs on the charging cabinet 370. After the power supply self-locking is maintained for a certain period, to avoid unnecessary power loss from the battery pack, it will switch to power supply from the AC charging device 360. If the first management module 372 determines that the power supply status indicates the AC charging device 360 ​​is not allowed to output charging power to the charging cabinet 370, it controls the output of the power supply signal to stop after a first preset time, thereby disconnecting 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 malfunctions, or the continuous working time of the charging cabinet 370 exceeds a second preset time, it controls the output of power supply signals to stop the power supply to the first management module 372. That is, when the charging cabinet 370 experiences the above situations, it is not necessary to continue charging or is not suitable to continue charging, so the charging operation is stopped to prevent unnecessary loss 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 to say, 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 interface 371a, 371b, 371c and 371d, but only distributes power to each charging interface 371a, 371b, 371c and 371d.

[0342] See also Figure 27 The AC charging device 360 ​​also 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 the input power is detected.

[0343] In some embodiments, the input power supply includes at least an AC input power supply, such as... Figure 26 As shown, the AC charging device 360 ​​is connected to an AC input power source through the input power interface 362. Alternatively, the input power source may also include, but is not limited to, a DC input power source, and the AC charging device can be connected to a DC input power source through the input power 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 via the charging interface 361. The AC charging device 360 ​​is also used to receive the DC input power source connected to the charging interface 361 and output charging power to the charging cabinet 370. Specifically, for example, the DC power source connected to the 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 further configured 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, so as 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 parameters on the charging cabinet interfaces 371 of the charging cabinet 370, the safety parameters 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 parameters of the charging interface 360, the charging capacity parameters of the AC charging device 360, the safety parameters 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 parameters characterizing the load state of the charging cabinet 370, and the second electrical parameter information may include at least parameters 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 further configured to generate a charging priority signal for the charging interface 361 and / or the charging cabinet 371 based on the parameters characterizing the load state of the charging interface 361 and the parameters 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] The charging priority signal typically represents a preset priority order. This preset priority order includes at least the following: the slot order of the charging interface 361 and the charging cabinet interface 371; the battery pack insertion order; the battery pack capacity from high to low or low to high; the remaining battery charge from high to low or low to high; the charging time from long to short or short to long; the charging rate from high to low or low to high; and the battery pack temperature from high to low or low to high, etc. Specific settings can be configured according to requirements and are not limited here. Notably, the priority order can also be set wirelessly via mobile devices for remote control.

[0349] In some embodiments, the main control module 363 may also be used, but is not limited to, to control at least one of the following 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 to each charging interface 361 of the AC charging device 360, and fault detection and handling of the AC charging device 360 ​​and / or the charging cabinet 370.

[0350] Specifically, to ensure the coordinated normal operation of the AC charging device 360 ​​and the charging cabinet 370, it is necessary to acquire various electrical parameters of the AC charging device 360 ​​and the charging cabinet 370 in real time for further management and control based on these parameters. When the AC charging device 360 ​​and the charging cabinet 370 work together, the AC charging device 360 ​​performs charging control, which includes controlling at least one of the following: the charging mode of the AC charging device 360, the power output to each charging interface 361a and 361b of the AC charging device 360 ​​and the power output to the charging cabinet 370, and fault detection and handling 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 further configured to control at least one of the following: receiving control commands sent by the mobile device through the wireless communication module 379, and outputting corresponding charging control signals according to the control commands; receiving program update commands sent by the mobile device through the wireless communication module 379, and updating the programs of the AC charging device 360 ​​and / or the charging cabinet 370 according to the program update commands; 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 is understandable that when the AC charging device establishes wireless communication with the mobile device through the wireless communication module, it can also receive various controllable function commands from the mobile device, such as display, locking, heating, and cooling, 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 receive charging power directly from the AC charging device 360 ​​through the charging interface 361, or they can receive charging power from the AC charging device 360 ​​through the charging cabinet 370, providing high charging flexibility. The charging cabinet 370 does not require a separate charging module, reducing the size and cost of the charging cabinet 370 and minimizing unnecessary power loss during charging. In addition, the charging cabinet 370 expands the number of charging interfaces, allowing users to fully charge multiple backpack battery packs and / or handheld battery packs at once to meet the power needs of the next day.

[0354] Figure 28 This is a schematic diagram of the circuit structure of an energy supply system provided in some other embodiments of this application. The energy supply system includes an AC charging device 360a, a first charging cabinet 370a, and at least one second charging cabinet 370b. Figure 28 Only one is shown in the document, but this 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 further include a charging output interface 366a, which is used to connect to a first charging cabinet 370a or a second charging cabinet 370b. The first charging cabinet 370a and the second charging cabinet 370b can be selectively connected to either 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 following in AC charging device 360a: charging interface 361a, main control module 363a, first management module 372a in first charging cabinet 370a, and charging interface 361a can be referred to the previous description of 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 charging output interface 366a of the AC charging device 360a to receive charging power provided by the AC charging device 360a. In other embodiments, the second charging cabinet 370b may also be connected to, but is not limited to, the output interface of the first charging cabinet 370a to receive charging power provided by the AC charging device 360a, wherein the output interface of the first charging cabinet 370a may be configured 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 second electrical parameter information and charging control signals sent by the main control module 363a, and to send third electrical parameters 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 to send corresponding charging control commands 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 based on the third electrical parameter information: parameter acquisition 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, and 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. The at least one second charging cabinet 370b can be connected to the charging interface 361a of the first charging cabinet 370a to receive charging power from the AC charging device 360a, or it can be directly connected to the charger output interface 366a of the AC charging device 360a to receive charging power from the AC charging device 360a, further improving flexibility. Furthermore, the charging power for both 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 redundancy in the charging circuits, 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 is respectively implemented by their corresponding first management module 372a and first management module 372b, which can improve the accuracy and timeliness of power distribution management.

[0362] In some embodiments, such as Figure 29As shown, the working system 1 also includes a trolley 50, which includes a trolley body 500 and rollers 510 supporting the trolley body 500. The trolley 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 trolley 50 can solve the transportation problem of work system 1, making it convenient for users to move various equipment.

[0364] Specifically, the trolley body 500 includes a bracket 501 and a push rod 502. The bracket 501 is configured to hold various devices in the working system 1. The bracket 501 is connected to the rollers 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] Furthermore, the stroller body 500 also includes a handle 503, which is connected to the push rod 502. Optionally, the handle 503 is pivotally connected to the push rod 502, allowing the user to adjust the angle of the handle for comfortable pushing.

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

[0367] The battery pack system includes a first type of battery pack and a second type of battery pack. The first type of battery pack is configured to be detachably installed on a first type of power tool to power it, and the second type of battery pack is configured to be detachably installed on a second type of power tool to power it. The rated capacity of the first type of battery pack is in the range of 550-3000Wh, and the weight of the first type of battery pack is in the range of 4-12Kg.

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

[0369] The DC charging device further includes at least one DC charging module configured to convert and transfer electrical energy from the first type of battery pack to the second type of battery pack, so that the first type of battery pack charges the second type of battery pack.

[0370] When the work team takes the aforementioned work system to the field, the first type of battery pack can power the power tools—in other words, it can be used as a tool bag—and simultaneously as an energy storage pack to power the second type of battery pack. This allows the second type of battery pack to be recharged promptly, enabling a small number of second type battery packs to be used cyclically. This eliminates the need to carry and purchase a large number of battery packs, allowing the power tool system to work for extended periods, thus improving work efficiency. Furthermore, the first type of battery pack has a larger capacity and is lighter, providing ample power to the second type of battery pack while remaining easy to carry and use. Users can also utilize the second type of battery pack more extensively, as it can be directly installed on the second type of power tools without needing to carry it on their backs, making it more portable and cost-effective.

[0371] Specifically, for details regarding the construction of the power supply system and power tool system, as well as their mechanical and electrical connections, please refer to the appendix. Figures 2 to 28 And the corresponding expressions mentioned above will not be repeated here. 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] This 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 being configured to detachably mount a first type of battery pack, and the output interface being configured to detachably mount a second type of battery pack.

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

[0374] The DC charging device in the aforementioned energy supply system simplifies the power conversion module by having only an input interface for receiving power input and not setting other DC input interfaces and / or AC input interfaces, making the DC charging device compact, lightweight, portable, and low-cost.

[0375] In some embodiments, such as Figure 30 As shown, the energy supply system 30' includes a DC charging device 300'. For details regarding the specific construction of the DC charging device, please refer to the attached diagram. Figures 17 to 23 And the corresponding expressions mentioned above will not be repeated here. 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, the charging interface is configured to detachably mount a first type battery pack and / or a second type battery pack, and 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 battery pack and / or the second type battery pack.

[0377] The energy supply system includes both DC and AC charging devices, allowing the work team to carry only the DC charging device during the day, using a backpack battery pack as an energy storage unit to power a handheld battery pack for extended work hours. After returning home in the evening, the AC charging device recharges the backpack and / or handheld battery packs to meet the power needs for the next day's work. This setup minimizes the need for the work team to carry excessive equipment during the day, making it easy to transport and move.

[0378] In some embodiments, see continue to see Figure 30 The energy supply system 30' also includes an AC charging device 360'. For details regarding the specific construction of the AC charging device, please refer to the appendix. Figure 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 a first type of battery pack and / or a second type of battery pack, and the charging module is configured to be connected to the charging interface and transmit the electrical energy output from the charging interface to the charging cabinet to realize the charging of 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 goes home at night, they can use the AC charging device and the charging cabinet to recharge the battery packs that are low on power to meet the work needs of the next day.

[0381] In some embodiments, see continue to see Figure 30 The energy supply system 30' also includes a charging cabinet 370'. Specifically, details regarding the construction of the charging cabinet and its connection to the AC charging device can be found in the appendix. Figures 23 to 28 And the corresponding expressions mentioned above will not be repeated here.

[0382] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A power supply system characterized by comprising: This includes battery pack systems and energy supply systems; The battery pack system includes a first type of battery pack and a second type of battery pack, wherein the first type of battery pack is configured to be detachably mounted to a first type of power tool for powering the tool, and the second type of battery pack is configured to be detachably mounted to a second type of power tool for powering the tool; wherein the rated capacity of the first type of battery pack is in the range of 550-3000Wh, and the weight of the first type of battery pack is in the range of 4-12Kg. The energy supply system includes a DC charging device, which includes an input interface and an output interface. The input interface is configured to detachably mount the first type of battery pack, and the output interface is configured to detachably mount the second type of battery pack. The DC charging device further includes at least one DC charging module, which 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.

2. The power supply system of claim 1, wherein, The first type of battery pack is configured to be carried by the user.

3. The power supply system of claim 1, wherein, The rated capacity to weight ratio of the first type of battery pack is in the range of 60-300Wh / Kg; and / or, the rated capacity to volume ratio of the first type of battery pack is in the range of 40-220Wh / L.

4. The power supply system as described in claim 1, characterized in that, The discharge rate of the first type of battery pack is greater than or equal to 2C.

5. The power supply system as described in claim 1, characterized in that, The maximum output power of the first type of battery pack is greater than or equal to 2KW.

6. The power supply system as described in claim 1, characterized in that, The average charging power of the DC charging device to the second type of battery pack is greater than the average discharging power of the second type of power tool to the second type of battery pack.

7. The power supply system as described in claim 1, characterized in that, The weight range of the second type of battery pack is 1-3.5Kg.

8. The power supply system as described in claim 1, characterized in that, The rated capacity to weight ratio of the first type of battery pack is in the range of 60-300Wh / Kg, and the maximum allowable charging rate of the second type of battery pack is not less than 7C.

9. The power supply system as described in claim 1, characterized in that, The rated capacity to weight ratio of the first type of battery pack is greater than that of the second type of battery pack.

10. The power supply system as described in claim 1, characterized in that, The time required for the second type of battery pack to charge from an empty state to a fully charged state is less than or equal to the time required for the second type of battery pack to discharge from a fully charged state to an empty state.

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