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 No. 202420908649.2 with the title of "Energy supply system" and filed on April 28, 2024, in the applicant's name. TECHNICAL FIELD

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

[0003] In some work scenarios, such as outdoor work scenarios, it is often necessary to use power tools to work for a long time without interruption. To achieve uninterrupted work of power tools, the choice of power source is the primary consideration.

[0004] Generally speaking, power tools using fuel as a power source (hereinafter referred to as fuel power tools, such as gasoline power tools) can meet the requirement of long-time uninterrupted work. However, the main problem of fuel power tools is that the exhaust gas released by them pollutes the environment, and the noise generated during the work of fuel power tools is relatively large, which will form noise pollution to the surrounding environment.

[0005] Electric power tools have the advantages of environmental protection and cleanliness, and compared with fuel power tools, electric power tools also produce relatively small noise. Therefore, electric power tools are more and more favored by users of power tools. However, the main problem of electric power tools is that the battery pack can provide short endurance. This problem is particularly prominent in outdoor or scenarios without a city power socket.

[0006] In order to meet the use demand that electric power tools can work for a long time without interruption in the absence of a city power socket, a common solution is that the user purchases a power storage power supply and a power supply device, the power storage power supply has sufficient power to meet long-time continuous work, and the power supply device is used to transmit the power of the power storage power supply to the battery pack for powering the electric power tool, so that the battery pack meets the power demand of long-time work. SUMMARY

[0007] Based on this, the application provides a power supply system, comprising 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 a first type of electric tool to supply power for the electric tool, and the handheld battery pack is configured to be detachably mounted to a second type of electric tool to supply power for the electric tool; wherein the backpack battery pack is configured to be able to be carried by a user; the energy supply system comprises a direct-current charging device, the direct-current charging device comprises an input interface and an output interface, the input interface is configured to detachably mount the backpack battery pack, and the output interface is configured to detachably mount the handheld battery pack; the direct-current charging device further comprises at least one direct-current charging module, the direct-current charging module is configured to receive the electric energy of the input interface for conversion and transmission to the output interface, so that the backpack battery pack charges the handheld battery pack.

[0008] In one embodiment, the power supply system further comprises a carrying device configured to be carried by a user, the carrying device comprises a cable and a plug interface and a first carrying interface connected by the cable, the first carrying interface is configured to detachably mount the backpack battery pack, and the plug interface is configured to detachably connect the second type of electric tool, when the second type of electric tool is connected to the plug interface and the backpack battery pack is mounted to the first carrying interface, the backpack battery pack supplies power for the second type of electric tool.

[0009] In one embodiment, the first carrying interface comprises a pair of first connecting parts arranged along a first plug-in direction, the first connecting parts are used to guide the backpack battery pack to be connected to the carrying device along the first plug-in direction.

[0010] In one embodiment, the power supply system further comprises a carrying device configured to be carried by a user, the carrying device comprises a cable and a plug interface and a second carrying interface connected by the cable, the second carrying interface is configured to detachably mount the handheld battery pack, and the plug interface is configured to detachably connect the second type of electric tool, when the second type of electric tool is connected to the plug interface and the handheld battery pack is mounted to the second carrying interface, the handheld battery pack supplies power for the second type of electric tool.

[0011] In one embodiment, the second carrying interface comprises a pair of second connecting parts arranged along a second plug-in direction, the second connecting parts are used to guide the handheld battery pack to be connected to the carrying device along the second plug-in direction.

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

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

[0014] In one embodiment, the first type of power tool has a higher power rating than the second type of power tool.

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

[0016] In one embodiment, the backpack battery pack has a rated capacity range of 550-3000 Wh.

[0017] In one embodiment, the backpack battery pack has a rated capacity to weight ratio range of 60-300 Wh / Kg.

[0018] In one embodiment, the backpack battery pack has a rated capacity to volume ratio range of 40-220 Wh / L.

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

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

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

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

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

[0024] In one embodiment, the handheld battery pack has a weight range of 1-3.5 Kg.

[0025] In one embodiment, the backpack battery pack has a rated capacity to weight ratio range of 60-300 Wh / Kg, and the handheld battery pack has a maximum allowable charging rate of no less than 7C.

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

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

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

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

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

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

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

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

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

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

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

[0037] In one embodiment, the input interface is configured to only receive power input from the backpack battery and not output power externally; and the output interface is configured to only output power 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 the backpack battery to connect with the direct current 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 the handheld battery pack to connect with the direct current charging device along the second sliding direction.

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

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

[0041] In one embodiment, the direct current charging device further comprises 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 comprises at least one alternating current charging device, the alternating current charging device comprising an input power interface configured to connect an alternating current power source, at least one charging interface configured to detachably mount the backpack battery pack and / or the handheld battery pack, and at least one alternating current charging module configured to receive alternating current power from the input power interface and output direct current power 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 configuration as the input interface; and / or, the charging interface has the same configuration as the output interface; and / or, the charging interface comprises the configuration of the input interface and the output interface.

[0044] In one embodiment, the energy supply system further comprises a charging cabinet, the charging cabinet comprising at least one charging cabinet interface configured to detachably connect with the backpack battery pack and / or the handheld battery pack, and at least one charging module configured to receive power from the charging interface and transmit 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 comprises a connecting device, the charging cabinet comprises an input interface, and the connecting device is configured to connect the charging interface and the input interface to transmit power output by the charging interface to the charging cabinet.

[0046] In one embodiment, the connecting device comprises a cable configured to connect with the input interface, and an adapter configured to detachably connect with the charging interface.

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

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

[0049] The application also provides a working system comprising the power supply system and the power tool system; the power tool system comprises a first type of power tool and a second type of power tool, the first type of power tool comprises a first tool interface, and the second type of power tool comprises a second tool interface different from the first tool interface.

[0050] In one embodiment, the working system further comprises a trolley comprising a main body and wheels supporting the main body, the trolley being used to transport at least one of the power tool system, the battery pack system, and the energy supply system.

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

[0052] The application also provides a power supply system comprising a battery pack system and an energy supply system; the battery pack system comprises a first type of battery pack and a second type of battery pack, the first type of battery pack being configured to be detachably mounted to the first type of power tool to supply power to the first type of power tool, and the second type of battery pack being configured to be detachably mounted to the second type of power tool to supply power to the second type of power tool; wherein the rated capacity of the first type of battery pack ranges from 550-3000Wh, and the weight of the first type of battery pack ranges from 4-12Kg; the energy supply system comprises a direct current charging device, the direct current charging device comprising an input interface and an output interface, the input interface being configured to detachably mount the first type of battery pack, and the output interface being configured to detachably mount the first type of battery pack; the direct current charging device further comprises at least one direct current charging module, the direct current charging module being configured to receive electrical energy from the input interface, convert the electrical energy, and transmit the converted electrical energy to the output interface, so as to charge the second type of battery pack with the first type of battery pack.

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

[0054] In one embodiment, the power supply system further comprises a carrying device configured to be carried by a user, the carrying device comprising a cable and a plug interface and a first carrying interface connected by the cable, the first carrying interface being configured to detachably mount the first type of battery pack, and the plug interface being configured to detachably connect the second type of power tool, when the second type of power tool is connected to the plug interface and the first type of battery pack is mounted to the first carrying interface, the first type of battery pack supplies power to the second type of power tool.

[0055] In one embodiment, the first backpack interface comprises a pair of first connecting portions arranged along the first insertion direction, the first connecting portions being configured to guide the first type battery pack to be connected to the backpack along the first insertion direction.

[0056] In one embodiment, the power supply system further comprises a backpack configured to be carried by a user, the backpack comprising a cable and an insertion interface and a second backpack interface connected by the cable, the second backpack interface being configured to detachably mount the second type battery pack, the insertion interface being configured to detachably connect the second type power tool, when the second type power tool is connected to the insertion interface and the second type battery pack is mounted to the second backpack interface, the second type battery pack supplies power to the second type power tool.

[0057] In one embodiment, the second backpack interface comprises a pair of second connecting portions arranged along the second insertion direction, the second connecting portions being configured to guide the second type battery pack to be connected to the backpack along the second insertion direction.

[0058] In one embodiment, the first type power tool further comprises a back frame configured to be carried by a user, the first type battery pack being configured to be detachably mounted to the back frame to supply power to the first type power tool.

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

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

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

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

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

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

[0065] In one embodiment, the temperature rise of the second type battery pack is no more than 14°C when the second type battery pack is charged at a 3C rate at an ambient temperature of about 20°C; and / or the temperature rise of the second type battery pack is no more than 19°C when the second type battery pack is charged at a 5C rate at an ambient temperature of about 20°C; and / or the temperature rise of the second type battery pack is no more than 24°C when the second type battery pack is charged at a 10C rate at an ambient temperature of about 25°C.

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

[0067] In one embodiment, the weight of the second type battery pack ranges from 1-3.5 Kg.

[0068] In one embodiment, the rated energy to weight ratio of the first type battery pack ranges from 60-300 Wh / Kg, and the maximum allowed charge rate of the second type battery pack is no less than 7C.

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

[0070] In one embodiment, the time required for the second type battery pack to charge from empty to full is less than or equal to the time required for the second type battery pack to discharge from full to empty.

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

[0072] In one embodiment, the temperature rise of the second type battery pack is no more than 14°C when the second type battery pack is charged at a 3C rate at an ambient temperature of about 20°C; and / or the temperature rise of the second type battery pack is no more than 19°C when the second type battery pack is charged at a 5C rate at an ambient temperature of about 20°C; and / or the temperature rise of the second type battery pack is no more than 24°C when the second type battery pack is charged at a 10C rate at an ambient temperature of about 25°C.

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

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

[0075] In one embodiment, the temperature rise of the second type battery pack is less than the temperature rise of the first type battery pack when charged at the same rate.

[0076] In one embodiment, the internal resistance of the single battery cell in the second type battery pack is less than the internal resistance of the single battery cell in the first type 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 an embodiment, the energy supply system further comprises a charging cabinet, the charging cabinet comprising at least one charging cabinet interface configured to be detachably connected with the first type battery pack and / or the second type battery pack, and at least one charging module configured to receive the electrical energy transmitted by the charging interface and transmit to the charging cabinet interface to realize charging of the first type battery pack and / or the second type battery pack.

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

[0089] In an embodiment, the connecting device comprises a cable configured to be connected with the input interface, and an adapter connected with the cable and configured to be detachably connected with the charging interface.

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

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

[0092] The present application also provides a working system comprising the foregoing power supply system and a power tool system; the power tool system comprises a first type power tool and a second type power tool, the first type power tool comprises a first tool interface, and the second type power tool comprises a second tool interface different from the first tool interface.

[0093] In an embodiment, the working system further comprises a trolley, the trolley comprising a main body and a roller supporting the main body, and the trolley is used to transport at least one of the power tool system, the battery pack system and the energy supply system.

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

[0095] The present application also provides an energy supply system comprising a direct current charging device, the direct current charging device comprising an input interface configured to be detachably mounted with a first type battery pack and an output interface configured to be detachably mounted with a second type battery pack; a direct current charging module configured to receive electrical energy of the input interface for conversion and transmission to the output interface to charge the first type battery pack for the second type battery pack; wherein the direct current charging device is only provided with the input interface for receiving power input.

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

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

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

[0099] In one embodiment, the DC charging device comprises a housing extending longitudinally along a height direction, the input interface and the output interface are oppositely arranged along a width direction perpendicular to the height direction.

[0100] In one embodiment, the DC charging device further comprises 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 comprises at least one AC charging device, the AC charging device comprising an input power interface configured to connect an AC power source, at least one charging interface configured to detachably mount the first type of battery pack and / or the second type of battery pack, and at least one AC charging module configured to receive AC power from the input power interface and convert the AC power into DC power and output to the charging interface to charge the first type of battery pack and / or the second type of battery pack.

[0102] In one embodiment, the charging interface is configured the same as the input interface; and / or, the charging interface is configured the same as the output interface; and / or, the charging interface comprises the configuration of the input interface and the output interface.

[0103] In one embodiment, the energy supply system further comprises a charging cabinet, the charging cabinet comprising at least one charging cabinet interface configured to detachably connect with the first type of battery pack and / or the second type of battery pack, and at least one charging module configured to receive power from the charging interface and transmit 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 comprises a connecting device, the charging cabinet comprises an input interface, and the connecting device is configured to connect the charging interface and the input interface to realize transmission of the electric energy output by the charging interface to the charging cabinet.

[0105] In one embodiment, the connecting device comprises a cable and an adapter connected to the cable, the cable is configured to be connected to the alternating current charging device, and the adapter is configured to be detachably connected to the charging interface.

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

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

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

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

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

[0111] Figure 3 is a schematic diagram of a battery pack system provided by the present application.

[0112] Figure 4 is a schematic diagram of a first type of power tool powered by a backpack battery pack provided by the present application.

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

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

[0115] Figure 7 is a schematic diagram of a backpack battery pack provided by the present application.

[0116] Figure 8 is a schematic diagram of a first type of power tool powered by a handheld battery pack provided by the present application.

[0117] Figure 9 is a schematic diagram of a handheld battery pack mounted to a lawn mower provided by the present application.

[0118] Figure 10is a schematic view of a handheld battery pack provided by the present application.

[0119] Figure 11 is a schematic view of a backpack battery pack provided by the present application mounted to a backpack blower.

[0120] Figure 12 is a schematic view of a handheld battery pack provided by the present application capable of powering a second type of power tool.

[0121] Figure 13 is a schematic view of a handheld battery pack provided by the present application mounted to a grass trimmer.

[0122] Figure 14 is a schematic view of a backpack battery pack provided by the present application powering a second type of power tool via a backpack device.

[0123] Figure 15 is a schematic view of a backpack device provided by the present application.

[0124] Figure 16 is a schematic view of a handheld battery pack provided by the present application powering a second type of power tool via a backpack device.

[0125] Figure 17 is a schematic view of a DC charging device provided by the present application from one perspective.

[0126] Figure 18 is a schematic view of a DC charging device provided by the present application from another perspective.

[0127] Figure 19 is a schematic view of a backpack battery pack and a handheld battery pack provided by the present application mounted to a DC charging device.

[0128] Figure 20 is a schematic view of another backpack battery pack and a handheld battery pack provided by the present application mounted to a DC charging device.

[0129] Figure 21 is a schematic view of a circuit structure of a power supply system provided by the present application.

[0130] Figure 22 is a schematic view of an internal air duct structure of a DC charging device provided by the present application.

[0131] Figure 23 is a schematic view of a structure of a first air duct and a second air duct provided by the present application.

[0132] Figure 24 is a schematic view of an AC charging device provided by the present application.

[0133] Figure 25 is a schematic view of a charging cabinet provided by the present application.

[0134] Figure 26 is a schematic diagram of an AC charging device and charging cabinet connected by a connection device provided by the present application.

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

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

[0137] Figure 29 is a schematic diagram of a trolley transport power supply system and power tool system provided by the present application.

[0138] Figure 30 is a schematic diagram of an energy supply system provided by the present application. DETAILED DESCRIPTION

[0139] The present application will be described in detail below with reference to the embodiments shown in the drawings. However, the embodiments are not intended to limit the present application, and the structural, method, or functional changes made by those skilled in the art based on the embodiments are included in the scope of the present application.

[0140] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. In the drawings shown, the directions such as up, down, left, right, front, and rear are relative, and are used to explain the structure and movement of the different components in the present application. When the components are in the positions shown in the drawings, these directions are appropriate. However, if the position of the components changes, it is considered that these directions will also 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 the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0142] Electric power is an environmentally friendly and clean energy. Therefore, electric power tools are more and more favored by people. Especially, the garden maintenance work itself has the attribute of green environmental protection, so for garden workers or garden companies, electric power tools are the most ideal choice. However, the main problem of the current electric power tools is that the power supply is insufficient, which cannot support the electric power tools to work continuously for a long time. Moreover, the garden work is usually carried out outdoors, and there is usually no power socket outdoors, which leads to the fact that even if electric power tools are used, the electric power tools cannot be charged in time.

[0143] In order to meet the use demand that the electric power tools can work continuously for a long time without power socket, a common solution is that the user purchases a power storage power supply and a power supply device, the power storage power supply has sufficient power to meet the long-time continuous work, and the power supply device is used to transmit the power of the power storage power supply to the battery pack for supplying power to the electric power tools, so that the battery pack meets the power demand of long-time work. However, this will cause some problems.

[0144] For commercial garden tools, a common use scenario is that 2-3 workers form a team and work outdoors for a day to maintain the gardens of 10-20 families. Once the garden of a family is maintained, the team will go to another garden and repeat the above work process until all work tasks for today are completed. As can be seen, the garden maintenance work has a large workload and a high demand for energy; at the same time, multiple work sites will be visited within a day, and work equipment often needs to be transferred between sites.

[0145] Therefore, for the above solution, since the power required for a day's work is large, the power of the power storage power supply needs to be set large, so the cost is inevitably high, which increases the economic pressure of the user. At the same time, due to technical limitations, the energy density of the power storage unit is generally not high, which leads to the fact that the weight of the power storage power supply is also large, which makes it inconvenient for the user to carry and use outdoors, and is not conducive to multiple site transfers.

[0146] In order to solve the problem that the weight of the work equipment is too large and is not conducive to site transfer, one solution is to design multiple power storage power supplies with relatively small weight and power, but this still cannot solve the problem of high cost. If a low-cost power storage power supply is selected as a cost reduction measure, it may also cause safety and reliability problems.

[0147] Therefore, the embodiments of the present application provide a different problem solving idea, which can effectively avoid the above problems by reasonably designing a set of work systems, the work systems are light and portable, and the cost is low, which are more suitable for garden workers.

[0148] The inventors of the present application have acutely identified that garden workers usually need to purchase two different types of battery packs, i.e., a backpack battery pack and a handheld battery pack, and the use scenarios of the two different types of battery packs also have seasonal differences, which will be analyzed in detail as follows.

[0149] The rated power of different garden tools varies greatly, which can be divided into two categories as follows: the first category is high-power electric tools, such as lawn mowers, backpack blowers, etc.; the second category is low-power electric tools, such as handheld blowers, string trimmers, pruning shears, etc. High-power electric tools and low-power electric tools also have different requirements for battery packs. Generally speaking, the battery pack for powering high-power electric tools has a large capacity, so the weight of the battery pack for powering high-power electric tools is also heavy, and the user needs to use the battery pack by backpack to reduce the weight pressure; while the battery pack for powering low-power electric tools has a relatively small capacity, so the weight of the battery pack for powering low-power electric tools is also light, and the user can use the battery pack by hand, which is more portable and has a lower cost. Therefore, in order to match the use requirements of different power electric tools, the user needs to purchase two different types of battery packs, i.e., a backpack battery pack and a handheld battery pack.

[0150] In addition, in different seasons, the demand for garden tools varies greatly, and the demand for corresponding matching battery packs also varies greatly. For example, in spring and summer, the lawn and trees grow luxuriantly, and the user's demand for low-power electric tools such as string trimmers and pruning shears is strong, while in autumn, the lawn growth stagnates, and the trees begin to shed leaves, and the user no longer needs too many string trimmers and pruning shears, and the demand is more shifted to high-power electric tools such as backpack blowers for cleaning leaves.

[0151] However, this will cause the problem of battery pack idling in each season. In spring and summer, the user uses low-power electric tools most of the time, and the backpack battery pack for powering high-power electric tools will be idle; in autumn, the user uses high-power electric tools most of the time, and the handheld battery pack for powering low-power electric tools will be idle, thereby causing the problem of resource waste.

[0152] Therefore, the embodiment of the present application provides a working system, which uses the easily idle backpack battery pack to supply power for the frequently used handheld battery pack, so that the power tool has the ability to work continuously for a long time (such as 1 day), and the user of the power tool does not need to worry about the problem of insufficient power supply during this period of time, and the user can effectively use the two types of battery packs in the battery pack system, effectively reducing the idle of the battery pack. In addition, since the user has already purchased the backpack battery pack, the existing backpack battery pack is used to charge the handheld battery pack, without the need to purchase additional energy storage power supply, and the weight of the backpack battery pack is relatively light, so the working system can also be light, portable and low in 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, and the power supply system is used to provide sufficient power supply for the 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 includes lawn mowers, backpack blowers and other garden power tools, and the second type of power tool usually includes handheld blowers, lawn mowers, trimmers and other garden power tools for garden repair work. The battery pack system includes at least one backpack battery pack and at least one handheld battery pack, which are used to supply power to the power tool system, wherein the backpack battery pack is configured to be detachably mounted to the first type of power tool to supply power to it, and the handheld battery pack is configured to be detachably mounted to the second type of power tool to supply power to it. The energy supply system includes a direct current charging device for converting the power of the backpack battery pack to supply power to the handheld battery pack.

[0154] When the working team carries the above working system to work outside, the backpack battery pack can supply power to the power tool, in other words, the backpack battery pack can be used as a tool bag, and at the same time, the backpack battery pack can also be used as an energy storage bag to supply power to the handheld battery pack. In this way, the problem of seasonal idling of the backpack battery pack can be solved, and the handheld battery pack can be timely charged, so that a small number of handheld battery packs can be recycled, without the need to carry and purchase a large number of battery packs, so that the power tool system can work for a long time, and the working efficiency is improved. In addition, the backpack battery pack can be carried on the back, and the weight is relatively light, so it is easy to carry and use. Moreover, the user can use the handheld battery pack more, and the handheld battery pack can be directly installed to the second type of power tool for use, without the need to be carried for use, so that the user can use it more conveniently and the cost is lower.

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

[0156] In some embodiments, as shown, Figure 2 The first type electric tool is set as, for example, a lawn mower 110, a backpack blower 120, etc. garden electric tools, and the second type electric tool is set as, for example, a handheld blower 130, a grass trimmer 140, a pruning machine 150, etc. garden electric tools. In some embodiments, as shown, Figure 3 The backpack battery pack system 21 includes at least one backpack battery pack 200, 200', and the handheld battery pack system 22 includes at least one handheld battery pack 210, 210'; the energy supply system 30 includes at least one direct current charging device.

[0157] The electric tool system 2 can include one or more first type electric tools and second type electric tools. The number of first type electric tools and second type electric tools can be the same or different. For example, if the work content required to be performed by the electric tool system is relatively single, one first type electric tool and one second type electric tool can complete it, at this time, the user of the working system 1 can be configured with only one first type electric tool and one second type electric tool. For example, if the work content required to be performed by the electric tool system 2 is diverse, multiple first type electric tools and multiple second type electric tools are required to cooperate to complete it, in this case, the user of the working system 1 can be configured with multiple first type electric tools and multiple second type electric tools. Among them, the rated power of the first type electric tool is defined as the first rated power, and the rated power of the second type electric tool is defined as the second rated power, and the first rated power is greater than the second rated power.

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

[0159] As an optional way, the number of working battery packs can be the same as the number of power tools working simultaneously. The number of standby battery packs is the same as the number of working battery packs, or the number of standby battery packs can be more than the number of working battery packs, to prevent the number of standby battery packs from being unable to support the uninterrupted work of the power tools when one of the working battery packs is damaged. Exemplarily, a working team usually consists of two people, and when working in a garden, one worker uses the lawn mower 110 to mow the lawn, and during mowing, the other worker will use handheld power tools to complete other types of work one after another, such as the other worker will first trim the grass, then prune the branches, and then blow the grass, and the two workers will complete all the work almost simultaneously, so the number of power tools working simultaneously is two, and when configuring the battery pack system, the number of battery packs can be configured as two working battery packs and three or four standby battery packs. The above battery pack configuration method is only an example, and in actual use, the user can configure according to the type of power tool, and the number of battery packs should be the least and can be used alternately without interruption.

[0160] As another alternative, the number of working battery packs can be set according to the number of power tools of 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 working team goes out to work, each power tool carried can be pre-installed with a battery pack, so that when switching from one power tool to another, the battery pack does not need to be installed and can be directly used, which is more in line with the use habits of workers using traditional fuel tools. For example, before the working team goes to work in a garden, the lawn mower 110, the backpack blower 120, the handheld blower 130, the grass trimmer 140 and the trimmer 150 can each be pre-installed with a battery pack. When one worker uses the lawn mower 110 to mow the lawn, another worker can use the grass trimmer 140 to trim the grass. After the grass trimming work is completed, the worker can directly use the trimmer 150 to trim the branches without installing a battery pack for the trimmer 150. After the trimming work is completed, the backpack blower 120 or the handheld blower 130 can be directly used for blowing work without installing a battery pack for the backpack blower 120 or the handheld blower 130.

[0161] It should be noted that when the number of backpack battery packs and handheld battery packs in the battery pack system is more than two, the plurality of backpack battery packs all have the same interface for installation to the first tool interface and the input interface. The plurality of backpack battery packs can all be of the same type, or all be of different types, or some of the backpack battery packs be of the same type and some of the backpack battery packs be of different types. Similarly, the plurality of handheld battery packs all have the same interface for installation to the second type of power tool. The plurality of handheld battery packs can all be of the same type, or all be of different types, or some of the handheld battery packs be of the same type and some of the handheld battery packs be of different types. Here, the "battery packs of different types" refers to one or more of the following differences: the capacity of the single battery cell, the type of the single battery cell, the internal structure of the battery pack, and the shape of the battery pack. In some embodiments, as shown in FIG. 2, 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 single battery cell, internal structure and shape of the two types of backpack battery packs 200 and 200' are all different, and the capacity, type of single battery cell, internal structure and shape of the two types of handheld battery packs 210 and 210' are also all different. Figure 3

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

[0163] Firstly, the specific structure and application scenarios of the backpack battery pack and the handheld battery pack as a tool kit when installed with the power tool system are introduced.

[0164] The backpack battery pack is configured to be mounted to the 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, as shown in Figure 4 The first type of power tool system 11 includes two first type of power tools, namely a lawn mower 110 and a backpack blower 120, wherein the lawn mower 110 includes a first tool interface 111, and the backpack blower 120 includes a first tool interface 121, the first tool interfaces 111, 121 have the same structure, and the backpack battery packs 200, 200' can be detachably mounted to the first tool interfaces 111, 121.

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

[0166] Correspondingly, as shown in Figure 7 The backpack battery pack 200 includes a backpack battery pack interface 201, and the backpack battery pack interface 210 includes a pair of first matching portions 201a, 201b, which are used to cooperate with the pair of first guide portions 111a, 111b, respectively, to realize the sliding connection of the lawn mower 110 and the backpack battery pack 200.

[0167] In some embodiments, the handheld battery pack is also configured to be detachably mounted to the first type of power tool to power the first type of power tool. The first type of power tool can adapt to the backpack battery pack and the handheld battery pack of two different interfaces, which is conducive to the universality of the battery pack system. When the backpack battery pack in the working battery pack is out of power, the first type of power tool can be powered by the backpack battery pack in the standby battery pack, or the handheld battery pack in the standby battery pack. In some embodiments, as shown in Figure 8As shown, the handheld battery pack 210 and 210' are each detachably mountable to the lawn mower 110 and the backpack blower 120 to power the lawn mower 110 and the backpack blower 120 by the handheld battery pack 210 and 210'.

[0168] In some embodiments, the first type of power tool further comprises a third tool interface configured to detachably mount the handheld battery pack to power the first type of power tool by the handheld battery pack. As Figure 9 As shown, taking the mounting of the handheld battery pack 210 to the lawn mower 110 as an example, the lawn mower 110 further comprises a third tool interface 113, and the handheld battery pack 210 is detachably mountable to the third tool interface 113 to power the lawn mower 110.

[0169] Specifically, as shown, Figure 6 The third tool interface 113 comprises a pair of third guide portions 113a, 113b extending along a third sliding direction A3, and the third guide portions 113a, 113b are used to guide the handheld battery pack 210 to slide along the third sliding direction A3 to be mounted to the lawn mower 110. Of course, the handheld battery pack 210 can also be slidably removed from the lawn mower 110 along a direction opposite to the third sliding direction A3. In the present embodiment, the third sliding direction A3 is parallel to the first sliding direction Al.

[0170] Further, the pair of first guide portions 111a, 111b and the pair of third guide portions 113a, 113b are independent of each other, and in a width direction perpendicular to the up-down direction, the pair of first guide portions 111a, 111b are located on both sides of the pair of third guide portions 113a, 113b. Such arrangement reduces the size of the first tool interface and the third tool interface, which is conducive to the miniaturization of 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 and the pair of third guide portions are independent of each other, in other words, the function of the pair of first guide portions 111a, 111b to guide the backpack battery pack 200 to be mounted to the lawn mower 110 along the first sliding direction Al and the function of the pair of third guide portions 113a, 113b to guide the handheld battery pack 210 to be mounted to the lawn mower 110 along the third sliding direction A3 will not cross each other.

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

[0172] As shown in Figure 6 , the pair of first guide portions 111a, 111b are arranged back to back, and the pair of third guide portions 113a, 113b are arranged face to face. Based on this arrangement, the pair of first guide portions 111a, 111b are arranged as a pair of outer rails, and the pair of third guide portions 113a, 113b are arranged as a pair of inner rails, and correspondingly, as shown in Figure 7 and Figure 10 , the pair of first engaging portions 201a, 201b are arranged as a pair of inner grooves, and the pair of second engaging portions 211a, 211b are arranged as a pair of outer grooves.

[0173] Of course, those skilled in the art can also arrange the pair of first guide portions face to face, i.e. as a pair of inner rails, and arrange the pair of second guide portions back to back, i.e. as a pair of outer rails, and correspondingly, arrange the pair of first engaging portions as a pair of outer grooves, and arrange the pair of second engaging portions as a pair of inner grooves; or arrange the pair of first guide portions and the pair of second guide portions as a pair of outer rails, and correspondingly, arrange the pair of first engaging portions and the pair of second engaging portions as a pair of inner grooves; or arrange the pair of first guide portions and the pair of second guide portions as a pair of inner rails, and correspondingly, arrange the pair of first engaging portions and the pair of second engaging portions as a pair of outer grooves. The present application does not limit the arrangement form of the first guide portion, the second guide portion, the first engaging portion and the second engaging portion.

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

[0175] Further, the mower 110 further comprises a first support portion 130 and a second support portion 131, the pair of first guide portions 111a, 111b comprises a pair of first extension portions 111a1, 111b1 extending along the first sliding direction A1, the pair of second guide portions 113a, 113b comprises a pair of second extension portions 113a1, 113b1 extending along the third sliding direction A3, the first extension portion 111a1 is protrudingly arranged from an outer side of the first support portion 130 in the width direction, the first extension portion 111b1 is protrudingly arranged from an outer side of the second support portion 131 in the width direction B, the second extension portion 113a1 is protrudingly arranged from an inner side of the first support portion 130 in the width direction B, and the second extension portion 113b1 is protrudingly arranged from an inner side of the second support portion 131 in the width direction.

[0176] In other words, one of the pair of first extension portions 111a1 and one of the pair of second extension portions 113a1 share the first support portion 130, and the other of the pair of first extension portions 111b1 and the other of the pair of second extension portions 113b1 share the second support portion 131. In this way, the layout of the first tool interface can be compact, so as to reduce the space occupied by the first tool interface, and thus the volume of the power tool.

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

[0178] Further, the first guide portion 111a further comprises an outer side wall 132 of the first support portion 130, and the first guide portion 111b further comprises an outer side wall 133 of the second support portion 131. Correspondingly, as shown in Figure 7 the first mating portion 201a comprises an inner side wall (not shown) matched with the first extension portion 111a1, and a first contact portion 201a1 matched with the outer side wall 132, and the first mating portion 201b comprises an inner side wall (not shown) matched with the first extension portion 111b1, and a first contact portion 201b1 matched with the outer side wall 133. Thus, when the backpack battery pack 200 is slidably matched with the mower 110 along the first sliding direction A1, the first extension portion 111a1, the outer side wall 132, the second extension portion 111b1 and the outer side wall 133 jointly constitute the guide and limit of the backpack battery pack 200.

[0179] Similarly, the second guiding portion 113a further comprises an inner side wall 134 of the first supporting portion 130, and the second guiding portion 113b further comprises an inner side wall 135 of the second supporting portion 131. Correspondingly, as shown in Figure 10 the second engaging portion 211a comprises an outer side wall 212 matched with the second extending portion 113a1, and a second contact portion 211a1 matched with the inner side wall 134, and the second engaging portion 211b comprises an outer side wall 213 matched with the second extending portion 113b1, and a second contact portion 211b1 matched with the inner side wall 135. Thus, when the handheld battery pack 210 is slid along the second sliding direction A2 to be coupled with the lawn mower 110, the second extending portion 113a1, the inner side wall 134, the second extending portion 113b1 and the inner side wall 135 jointly constitute the guidance and limiting of the handheld battery pack 210.

[0180] In some embodiments, the lawn mower 110 further comprises a plurality of first tool polar pieces 111c located between the pair of second guiding portions 120a, 120b, which are uniformly distributed along the width direction B, and correspondingly, the backpack battery pack 200 comprises a plurality of backpack battery pack polar pieces (not shown) located between the first engaging portions 201a, 201b, and the handheld battery pack 210 comprises a plurality of handheld battery pack polar pieces (not shown) located between the second engaging portions 211a, 211b. When the backpack battery pack 200 is coupled with the lawn mower 110, the first tool polar pieces 111c are used to be electrically connected with the corresponding backpack battery pack polar pieces to realize the power transmission between the backpack battery pack 200 and the lawn mower 110; when the handheld battery pack 210 is coupled with the lawn mower 110, the first tool polar pieces 111c are used to be electrically connected with the corresponding handheld battery pack polar pieces to realize the power transmission between the handheld battery pack 210 and the lawn mower 110.

[0181] It should be noted that the first tool polar pieces, the backpack battery pack polar pieces and the handheld battery pack polar pieces can be provided in any form easily thought of by those skilled in the art, which will not be described herein again.

[0182] The backpack battery pack and the handheld battery pack can be coupled with the first tool polar pieces, so that the structure is simple and compact, which is conducive to the miniaturization of the first type of electric power tool.

[0183] The lawn mower 110 is provided with a terminal seat 115, and the first tool polar pieces 111c are at least partially mounted on the terminal seat 115. Correspondingly, as shown in Figure 7 the backpack battery pack 200 is provided with a plurality of first terminal grooves 205 located between the pair of first engaging portions 201a, 201b, and each backpack battery pack polar piece is at least partially accommodated in the corresponding first terminal groove 205; as shown in 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 second type of power tools, namely a handheld blower 130, a grass trimmer 140 and a brush cutter 150, wherein the handheld blower 130 includes a second tool interface 131, the grass trimmer 140 includes a second tool interface 141, and the brush cutter 150 includes a second tool interface 151, the second tool interfaces 131, 141, 151 are of the same form, and the handheld battery pack 210, 210' can be detachably mounted to the second tool interfaces 131, 141, 151.

[0195] Taking the mounting of the handheld battery pack 210 to the grass trimmer 140 as an example, as shown in Figure 13 The second tool interface 141 includes a pair of second guide portions 141a, 141b extending along a second sliding direction A2, and the second guide portions 141a, 141b are used to guide the handheld battery pack 210 to slide along the second sliding direction A2 and be mounted to the grass trimmer 140. Of course, the handheld battery pack 210 can also be slidably removed from the grass trimmer 140 along a direction opposite to the second sliding direction A2.

[0196] The second tool interface 141 is of substantially the same structure as the third tool interface 113, and will not be described here. Correspondingly, as shown in Figure 10 A pair of second mating portions 211a, 211b are used to cooperate with the pair of second guide portions 141a, 141b respectively, so as to realize the mounting of the grass trimmer 140 and the handheld battery pack 210.

[0197] It should be noted that the first tool interface, the second tool interface, the third tool interface and the backpack battery pack interface, the handheld battery pack interface can also be other cooperation forms, which can meet the connection of the battery pack and the power tool.

[0198] Further, the second tool interface further includes a plurality of second type of power tool poles for electrical connection with the handheld battery pack. Taking the grass trimmer 140 as an example, the second tool interface 141 includes a plurality of second type of power tool poles 141c, which are located between the pair of second guide portions 141a, 141b in a direction perpendicular to the second sliding direction A2. Correspondingly, the handheld battery pack poles (not shown) are used to connect with the second type of power tool poles 141c, so as to realize the electrical connection between the handheld battery pack and the second type of power tool.

[0199] In some embodiments, the backpack battery pack can also power the second type of power tool, so as to realize the versatility of the battery pack. As shown in Figure 14 and Figure 15As shown, the backpack battery pack 200, 200' can power the handheld hair dryer 130, the grass trimmer 140, and the trimmer 150. Take the backpack battery pack 200 powering the grass trimmer 140 as an example, as shown in FIG. 6A, the backpack battery pack 200 is connected to the first tool interface 111 of the grass trimmer 140 through the cable 610, and the grass trimmer 140 is powered by the backpack battery pack 200. Figure 15 As shown, the power supply system further comprises a backpack device 600 configured to be carried by a user, the backpack device 600 comprises a cable 610, and a plug interface 620 and a first backpack interface 630 connected by the cable 610, the first backpack interface 630 is configured to detachably mount the backpack battery pack 200, and the plug interface 620 is configured to detachably connect the 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 backpack interface 630, the backpack battery pack 200 powers the grass trimmer 140.

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

[0201] In some embodiments, in order to meet the needs of some users who prefer to carry the battery pack, the handheld battery pack can also be used to power the second type of power tool through the backpack device. As shown in FIG. 7A and FIG. 7B, Figure 16 As shown, the handheld battery pack 210, 210' can be used to power the handheld hair dryer 130, the grass trimmer 140, and the trimmer 150 through the backpack device 600. Take the handheld battery pack 210 powering the grass trimmer 140 through the backpack device 600 as an example, as shown in FIG. 7A, the handheld battery pack 210 is connected to the first tool interface 111 of the grass trimmer 140 through the cable 610, and the grass trimmer 140 is powered by the handheld battery pack 210. Figure 15 As shown, the backpack device 600 comprises a second backpack interface 640 configured to detachably mount the handheld battery pack 210, and the plug interface 620 is configured to detachably connect the second tool interface 640, when the grass trimmer 140 is connected to the plug interface 620 and the handheld battery pack 210 is mounted to the second backpack interface 640, the handheld battery pack 210 powers the grass trimmer 140. Wherein, the structure of the second backpack interface 640 is configured to be substantially the same as the structure of the second tool interface 141, which will not be repeated here. By providing the first backpack interface for mounting the backpack battery pack and the second backpack interface for mounting the handheld battery pack on the backpack device, it is not necessary to additionally provide a new backpack device, which can save cost and reduce carrying pressure.

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

[0203] Since the weight of commercial garden electric tools is usually large, the direct connection of the battery pack to the electric tool will cause the user to bear too much burden. The detachable mounting of the backpack battery pack and / or handheld battery pack to the backpack device through the backpack device makes the user work conveniently and labor-saving.

[0204] In order to make the working system as light as possible while meeting the requirement of the backpack battery pack for being used for backpacking, in some embodiments, the weight of a single backpack battery pack is set to be in the range of 4-12 Kg, and optionally, the weight of a single backpack battery pack is set to be in the range of 5-10 Kg, such as 5 Kg, 8 Kg, 10 Kg or others.

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

[0206] As mentioned before, the backpack battery pack needs to be used not only as a tool pack to power the electric tool, but also as an energy storage pack to power the handheld battery pack. The following will elaborate the use requirement of the backpack battery pack as an energy storage pack.

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

[0208] Since the weight of the backpack battery pack should not be too large and needs to have sufficient power, the backpack battery pack needs to store as much power as possible in unit mass. In some embodiments, the ratio of the rated power to the weight of a single backpack battery pack is set to be in the range of 60-300 Wh / Kg. Optionally, the ratio of the rated power to the weight of a single backpack battery pack is set to be in the range of 80-200 Wh / Kg, such as 80 Wh / Kg, 100 Wh / Kg, 200 Wh / Kg or others.

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

[0210] As previously described, since the working system needs to meet the power supply demand in a long time, the handheld battery pack needs to be charged as soon as possible after the power is used up to be recycled. In order to make the handheld battery pack charge quickly, the backpack battery needs to provide a larger output power to the handheld battery pack. Limited by technology and weight, the backpack battery has limited storage capacity. Since the discharge rate of the battery pack is the ratio of the output power of the battery pack to the rated capacity of the battery pack, that is, the greater the output power of the battery pack, the greater the discharge rate of the battery pack, therefore, the backpack battery needs to discharge the handheld battery pack at a larger discharge rate. In some embodiments, the discharge rate of the backpack battery is greater than or equal to 2C. Alternatively, the discharge rate of the backpack battery is set to 4-10C, such as 4C, 5C, 10C or others.

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

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

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

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

[0215] In actual work, the application scenarios of the backpack battery pack as an energy storage pack are much more than as a tool pack. Therefore, the backpack battery pack does not need to be used cyclically without too many requirements. That is, the backpack battery pack has relatively low real-time requirements for charging. Therefore, in some embodiments, the charging rate of the single battery cell in the backpack battery pack can be set lower, thereby reducing the cost of the single battery cell. For example, the charging rate of the single battery cell in the backpack battery pack is set to be less than the charging rate of the single battery cell in the handheld battery pack, so that the two types of battery cells can be used together, thereby reducing the cost of the battery cells of the power supply system. Optionally, the charging rate of the single battery cell in the backpack battery pack ranges from 0.2C to 1C, for example, the charging rate of the single battery cell in the backpack battery pack can be set to 0.75C.

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

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

[0218] As described before, the handheld battery pack needs to be used frequently as a tool pack, and its power needs to be filled as soon as possible to be used cyclically. The following will elaborate the use requirements of the handheld battery pack to meet the cyclic use.

[0219] In order to enable the handheld battery pack to be used uninterruptedly, the time required for the handheld battery pack to be charged from an empty state to a full state is less than the time required for the handheld battery pack to be discharged from a full state to an empty state. In some embodiments, the average charging power of the handheld battery pack by the direct current charging device is greater than the average discharging power of the handheld battery pack by the second type of electric power tool. It should be noted that the "empty state" of the battery pack means that the remaining capacity of the battery pack is less than or equal to 5%, and the "full state" of the battery pack means that the remaining capacity of the battery pack is greater than or equal to 95%.

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

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

[0222] The rated voltage (or voltage platform) of the handheld battery pack can be designed according to the working voltage (or voltage platform) of the electric tool. The rated voltage of the handheld battery pack generally needs to match the working voltage of the electric tool. In some embodiments, the rated voltage of the handheld battery pack can be designed to be higher, such as not less than 40V. In some embodiments, the rated voltage of the handheld battery pack is also set to 54V. Under the condition of a certain discharge rate, designing the rated voltage of the handheld battery pack to be higher can improve the discharge power of the handheld battery pack, so as to support the electric tool to work at a larger power.

[0223] The maximum charge-discharge cycle number of the large-capacity battery pack on the market is generally within 1000 times, and the maximum charge-discharge cycle number of the common large-capacity battery pack is between 300-500 times. The lower charge-discharge cycle number will result in shorter service life of the battery pack, which needs to be replaced frequently, which undoubtedly increases the use cost of the working system. Taking garden trimming work as an example, if a large-capacity battery pack with a maximum charge-discharge cycle number between 300-500 times is used, a new battery pack needs to be purchased after a maximum of several months, which will obviously result in a higher cost of the working system.

[0224] In order to solve the above problems, in some embodiments, the maximum charge-discharge cycle number of the single cell in the handheld battery pack is designed to be not less than 1000 times, so as to ensure the service life of the handheld battery pack. Even if a battery pack needs to be charged and discharged 3 times a day, 1000 times of charge-discharge cycle can make the service life of the battery pack reach one year, so as to meet the use demand of the garden team.

[0225] In some embodiments, assuming that the time required for a single handheld battery pack to be charged from empty to full is t1, and the time required for a single handheld battery pack to be discharged from full to empty is t2, then t1≤t2. In this way, the user can achieve uninterrupted use of the handheld battery pack, thereby improving work efficiency. Further, assuming that the waiting time for a single handheld battery pack to enter a discharging state after the end of charging is t3, and the waiting time for a single handheld battery pack to enter a charging state after the end of discharging is t4, then t1+t3+t4≤t2. It should be noted that if the temperature of the handheld battery pack is too high after charging is completed, the discharging process of the handheld battery pack 210 can be started only after the temperature of the handheld battery pack is reduced, and therefore the waiting time t3 can occur. If the temperature of the handheld battery pack is too high after discharging is completed, the charging process of the handheld battery pack can be started only after the temperature of the handheld battery pack is reduced, and therefore the waiting time t4 can occur. In addition, if a perfect thermal management system is adopted during the charging process, t3 can be 0, i.e., the user does not need to wait, and the handheld battery pack can directly discharge after the end of charging. If a perfect thermal management system is adopted during the discharging process, t4 can be 0, i.e., the user does not need to wait, and the handheld battery pack can directly charge after the end of discharging.

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

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

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

[0229] In a third aspect, the thermal management device arranged inside the battery pack also has an impact on the temperature rise characteristics of the battery pack. The thermal management device can adjust the temperature of the battery pack, so that the battery pack can work normally at a higher or lower ambient temperature. For example, the thermal management device can include a heating device and / or a heat dissipation device. The heating device can heat the battery pack at a lower ambient temperature to prevent the battery pack from being unable to start charging and discharging due to too low temperature, so that the battery pack can immediately start charging and discharging in cold weather. The heat dissipation device can prevent the battery pack from overheating to some extent, so that the battery pack can start charging and discharging in a high-temperature environment.

[0230] In the process of large current charging, if the temperature of the handheld battery pack during charging is not controlled, the temperature of the handheld battery pack can be high due to the large charging current of the handheld battery pack. The high temperature of the handheld battery pack can cause the following problems. First, if the temperature of the handheld battery pack exceeds the preset temperature threshold during charging, the direct current charging device can enter a charging protection state. Once the charging protection state is entered, the charging process of the handheld battery pack will be forced to stop. Second, as mentioned earlier, if the temperature of the handheld battery pack is high after charging is completed, the discharge process of the handheld battery pack can need to be started after the temperature of the handheld battery pack is reduced. In addition, in a low-temperature working scenario (such as outdoor in cold weather), the handheld battery pack can be too cold, causing the handheld battery pack to be unable to immediately start charging or discharging. The above problems can all cause the charging of the direct current charging device to be intermittent.

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

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

[0233] As described above, the working system needs to meet the demand of light and portable use, and the backpack battery pack in the working system needs to meet the characteristics of energy storage pack, and the handheld battery pack needs to meet the demand of fast cycling use. Therefore, in some embodiments, the rated power-to-weight ratio of the backpack battery pack ranges from 60 to 300 Wh / Kg, and the maximum allowable charging rate of the handheld battery pack is not less than 7C. In this way, the backpack battery pack is light in weight and sufficient in power, so as to realize lightness and be able to fully charge the handheld battery pack, and the charging rate of the handheld battery pack is able to support fast charging, so as to meet the demand of fast cycling use. Optionally, the rated power-to-weight ratio of a single backpack battery pack ranges from 80 to 200 Wh / Kg, for example, 80 Wh / Kg, 100 Wh / Kg, 200 Wh / Kg or other; and the maximum allowable charging rate of the single cell in the handheld battery pack is set to 7-12C, for example, 7C, 10C, 12C or other.

[0234] Further, in some embodiments, the discharge rate of the backpack battery pack is greater than or equal to 2C, and the discharge rate of the backpack battery pack is set to 4-10C, for example, 4C, 5C, 10C or other. In this way, the backpack battery pack is able to support high-current discharge and meet the demand of charging the handheld battery pack as an energy storage pack. In some embodiments, the maximum allowable discharge power of the backpack battery pack is not less than the maximum allowable charging power of the handheld battery pack, so that the handheld battery pack is able to realize fast charging and meet the cycling use. It should be noted that, in some embodiments, in order to reduce the charging waiting time t3 as much as possible, when the handheld battery pack is charged at a rate of 3C, the temperature rise of the handheld battery pack is not more than 14℃ at an ambient temperature of about 20℃; and / or when the handheld battery pack is charged at a rate of 5C, the temperature rise of the handheld battery pack is not more than 19℃ at an ambient temperature of about 20℃; and / or when the handheld battery pack is charged at a rate of 10C, the temperature rise of the handheld battery pack is not more than 24℃ at an ambient temperature of about 25℃. In some embodiments, the internal resistance of the single cell in the handheld battery pack is less than or equal to 3mΩ. Optionally, the internal resistance of the single cell in the handheld battery pack ranges from 1.8mΩ to 3mΩ, for example, 1.9mΩ, 2mΩ, 2.2mΩ, 2.6mΩ.

[0235] To better meet the needs of the backpack battery pack for handheld battery pack full of electricity, the rated capacity of the backpack battery pack needs to be greater than the rated capacity of the handheld battery pack, the rated capacity of the backpack battery pack is defined as the first electric quantity, and the rated capacity of the handheld battery pack is defined as the second electric quantity. Optionally, the ratio of the first electric quantity to the second electric quantity is greater than or equal to 2. In this way, one backpack battery pack can also charge at least two handheld battery packs to full capacity, which can effectively alleviate the user's power anxiety problem. Further, the ratio of the first electric quantity to the second electric quantity is 3-15. Since the storage capacity of the backpack battery pack is much larger than that of the handheld battery pack, the carrying of the backpack battery pack can supplement the power of multiple handheld battery packs. Optionally, the ratio of the first electric quantity to the second electric quantity is 3, 4, 5, 7, 10, 12 or other.

[0236] It should be noted that "the first electric quantity and the second electric quantity" also refer to the ratio of the electric quantity of a single backpack battery pack to the electric quantity of a single handheld battery pack.

[0237] To better meet the needs of the backpack battery pack for handheld battery pack full of electricity, the rated capacity of the backpack battery pack also needs to be greater than the rated capacity of the handheld battery pack, the rated capacity of the backpack battery pack is defined as the first capacity; the rated capacity of the handheld battery pack is defined as the second capacity, and the first capacity is greater than the second capacity.

[0238] Further, the ratio of the first capacity to the second capacity is 3-15. Optionally, the ratio of the first capacity to the second capacity is 3, 4, 5, 7, 10, 12, etc. In this way, one backpack battery pack can charge multiple handheld battery packs to full capacity, which can effectively alleviate the user's power anxiety problem.

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

[0240] When the first capacity and the second capacity are too large, the volume and weight of the backpack battery pack and the handheld battery pack also increase accordingly, which is not convenient for carrying and using. When the first capacity and the second capacity are too small, the power demand of the garden team for one day of work outside cannot be met. Optionally, the range of the first capacity is 11-30AH, and / or the range of the second capacity is 2-8AH.

[0241] In some embodiments, the weight of the backpack battery pack is also greater than the weight of the handheld battery pack. Therefore, as shown in Figure 4 , the backpack battery pack can be installed on the second type of electric tool to supply power for it, and the user does not need to directly bear the weight of the backpack battery pack 200. As shown in Figure 12As shown, the handheld battery pack can be mounted to the first type of power tool to power the power tool. Of course, as mentioned above, the backpack battery pack can also be connected to the backpack device to power the power tool. In this way, the user can achieve the backpack battery pack, thereby facilitating use. In order to facilitate the work team to carry, carry and use the backpack battery pack and the handheld battery pack, in an embodiment, the weight of a single backpack battery pack ranges from 4 to 12 kg, and / or the weight of a single handheld battery pack ranges from 1 to 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. Further, in order to prevent the DC charging device from being easily tilted when the backpack battery pack and the handheld battery pack are mounted on the DC charging device, the weight ratio of a single backpack battery pack to a single handheld battery pack is greater than or equal to 2 and less than or equal to 8.

[0243] Similarly, since the first capacity is greater than the second capacity, the volume of the backpack battery pack is also greater than the volume of the handheld battery pack. In order to avoid the volume being too large to affect the floor area, 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. Alternatively, 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 above, the user needs to select a backpack battery pack with large capacity and light weight to meet the work requirements as an energy storage pack, which puts high requirements on the energy density of the backpack battery pack, while the handheld battery pack has relatively low energy density. Among them, the energy density of the battery pack refers to the amount of electricity stored in a unit mass / volume of the battery pack. In this application, the amount of electricity stored in a unit mass of the battery pack is defined as the ratio of the rated capacity to the weight, and the amount of electricity stored in a unit volume of the battery pack is defined as the ratio of the rated capacity to the volume. In some embodiments, the ratio of the rated capacity to the weight of the backpack battery pack is greater than the ratio of the rated capacity to the weight of the handheld battery pack. Alternatively, the ratio of the rated capacity to the weight of the backpack battery pack ranges from 60 to 300 Wh / Kg, and / or the ratio of the rated capacity to the weight of the handheld battery pack ranges from 60 to 300 Wh / Kg. The ratio of the rated capacity to the volume of the backpack battery pack ranges from 40 to 220 Wh / L, and / or the ratio of the rated capacity to the volume of the handheld battery pack ranges from 60 to 220 Wh / L.

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

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

[0247] In addition, since the internal resistance is one of the important factors affecting the temperature rise characteristics of the battery pack, in some embodiments, the internal resistance of the single battery cell in the handheld battery pack is less than that of the single battery cell in the backpack battery pack.

[0248] In some embodiments, the single battery cell in the backpack battery pack is different from the single battery cell in the handheld battery pack. The person skilled in the art can select the single battery cell in the backpack battery pack and the single battery cell in the handheld battery pack as needed. For example, the single battery cell in the backpack battery pack and the single battery cell in the handheld battery pack are both soft pack battery cells; or the single battery cell in the backpack battery pack is a soft pack battery cell and the single battery cell in the handheld battery pack is a cylindrical battery cell; or the single battery cell in the backpack battery pack and the single battery cell in the handheld battery pack are both cylindrical battery cells, which are not limited by the present application.

[0249] In actual working scenarios, the backpack battery pack is more used as an energy storage pack for the handheld battery pack, and the user rarely needs to directly bear the weight of the backpack battery pack. Therefore, compared with the handheld battery pack, the backpack battery pack has relatively low requirements for weight. Therefore, taking the example of the backpack battery pack 200' charging the handheld battery pack 210, the single battery cell in the backpack battery pack 200' is selected to be a 21700 cylindrical battery cell with relatively heavy weight, and the single battery cell in the handheld battery pack 210 is selected to be a soft pack battery cell with relatively light weight, thereby reducing the cost of the single battery cell.

[0250] As described above, compared with the backpack battery pack, the handheld battery pack is more portable and inexpensive, and the working team of the garden work is more willing to use the handheld battery pack as the energy of the electric tool. In order to enable the handheld battery pack to have continuous power and meet the working requirements for a long time, the working system 1 also provides an energy supply system, and the energy supply system includes a direct current charging device for converting and supplying the power of the backpack battery pack to the handheld battery pack to continuously meet the power requirements of the handheld battery pack.

[0251] The direct current charging device includes at least one input interface and at least one output interface, the input interface is configured to detachably mount the backpack battery pack, and the output interface is used to removably connect with the handheld battery pack. The direct current charging device further includes at least one direct current charging module, and the direct current charging module is configured to convert the power of the backpack battery pack and transmit it to the handheld battery pack, so that the backpack battery pack charges the handheld battery pack.

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

[0253] In order to facilitate the user to carry, the housing 301 is provided with a holding part 302. Optionally, the holding part 302 is provided as a handle. Further, the holding part 302 is pivotally connected with the housing 301, and the holding part 302 can be flipped upward to be held vertically by the user, or flipped downward to be stored on the housing 301.

[0254] The direct current charging device 300 includes an input interface 310 and an output interface 320, and the input interface 310 and the output interface 320 are oppositely arranged along the width direction perpendicular to the height direction c. The input interface 310 is oppositely arranged with the output interface 320, which can reasonably utilize the space of the direct current charging device 300, and is also beneficial to keep the direct current charging device 300 balanced and not easy to fall over.

[0255] In the embodiment, the number of the input interface and the output interface is 1. In other embodiments, the number of the input interface and the output interface can be other, for example, 2, 3, 4, 6, etc., which is not specifically limited here and is determined according to the actual situation.

[0256] The number of the input interface and the output interface can be the same or different. Taking the number of the input interface as 1 and the number of the output interface as 2 as an example, the input interface is arranged on one side of the direct current charging device, and the two output interfaces are arranged on the other side of the direct current charging device. In this way, the backpack type battery pack can charge two handheld type battery packs, and the charging mode can be simultaneous charging or sequential charging.

[0257] Taking the installation of the backpack type battery pack 200 and the handheld type battery pack 210 on the direct current charging device 300 as an example, the input interface 310 includes a pair of first connecting parts 311 arranged along a first sliding direction, used for connecting with a pair of first matching parts 201a, 201b, and used for guiding the backpack type battery pack 200 to slide along the first sliding direction and be installed on or separated from the direct current charging device 300. The output interface 320 includes a pair of second connecting parts 321 arranged along a second sliding direction, used for connecting with a pair of second matching parts 211a, 211b, and used for guiding the handheld type battery pack 210 to slide along the second sliding direction and be installed on or separated from the direct current charging device 300. The structures of the input interface and the output interface can be the same or different. In the embodiment, the first sliding direction and the second sliding direction are parallel to each other, and both are parallel to the height direction c. The size of the first connecting part 311 along the height direction c is greater than the size of the second connecting part 321 along the height direction c.

[0258] In the embodiment, the input interface 310 has substantially the same configuration as the first tool interface 111 described above, and the output interface 320 has substantially the same configuration as the second tool interface 141 described above. That is, the pair of first connecting portions 311 are arranged as a pair of outer slide rails, and the pair of second connecting portions 321 are arranged as a pair of inner slide rails.

[0259] Of course, it is easily conceivable for those skilled in the art that the first connecting portions and the second connecting portions can also be arranged in other forms, and the present application does not limit this, as long as the input interface can be connected to the backpack battery pack interface and the output interface can be connected to the handheld battery pack interface.

[0260] In the embodiment, the plugging direction of the backpack battery pack 200 to the DC charging device 300 is parallel to the plugging direction of the handheld battery pack 210 to the DC charging device 300. The plugging direction refers to the mounting direction of the battery pack to the DC charging device and the dismounting direction of the battery pack from the DC charging device. Specifically, the plugging direction is parallel to the height direction c. The backpack battery pack 200 slides along the pair of first connecting portions 311 from top to bottom (e.g., c1 direction as shown in Figure 19 FIG. 4) in the height direction, so that the backpack battery pack 200 can be mounted to the DC charging device 300; and the handheld battery pack 210 slides along the pair of second connecting portions 321 from top to bottom in the height direction, so that the handheld battery pack 210 can be mounted to the DC charging device 300. The backpack battery pack 200 slides along the pair of first connecting portions 311 from bottom to top (e.g., c2 direction as shown in Figure 19 FIG. 5) in the height direction, so that the backpack battery pack 200 can be dismounted from the DC charging device 300; and the handheld battery pack 210 slides along the pair of second connecting portions 321 from bottom to top in the height direction, so that the handheld battery pack 210 can be dismounted from the DC charging device 300.

[0261] Further, referring to Figure 17 , the input interface 310 further includes a plurality of first charging poles, which are located between the pair of first connecting portions 311 and include a first positive pole 321, a first negative pole 322, a first analog signal communication pole 323, a first digital signal communication pole 324, and a second digital signal communication pole 325. The input interface 310 has two digital communication modes and can communicate with two different types of battery packs. In the embodiment, the communication type of the first digital signal communication pole 324 is serial communication, and the communication type of the second digital signal communication pole 325 is differential communication. Specifically, the differential communication can be CAN (Controller Area Network) communication.

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

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

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

[0265] Specifically, when the back-mounted battery pack 200 is installed to the direct current charging device 300, the first positive pole 321, the first negative pole 322, the first analog signal communication pole 323, the first digital signal communication pole 324 and the second digital signal communication pole 325 are respectively inserted with the first positive pole, the first negative pole, the first digital signal communication pole and the second digital signal communication pole. The direct current charging device 300 first activates the back-mounted battery pack 200 through the first analog signal communication pole 323, and then communicates with the back-mounted battery pack 200 through the second digital signal communication pole 325. When the communication is successful, the direct current charging device 300 recognizes that the back-mounted battery pack 200 is a straight plug-in connection.

[0266] Similarly, when the handheld battery pack 210 is installed to the direct current charging device 300, the second positive pole tab 331, the second negative pole tab 332, the second analog signal communication tab 333, the third digital signal communication tab 334 and the fourth digital signal communication tab 335 are respectively plugged with the second positive pole contact, the second negative pole contact, the third digital signal communication contact and the fourth digital signal communication contact, the direct current charging device 300 first activates the handheld battery pack 210 through the second analog signal communication tab 333, then carries out digital signal communication with the handheld battery pack 210 through the fourth digital signal communication tab 335, when the communication is successful, the direct current charging device 300 recognizes that the handheld battery pack 210 is a direct insertion type connection.

[0267] Please refer to Figure 7 and Figure 17 , the input interface 310 further comprises a first locking member 312 between the pair of first connecting members 311, when the backpack battery pack 200 is installed to the direct current charging device 300, the first locking member 312 is used to cooperate with the first locking member 250 of the backpack battery pack, so as to realize the connection locking of the backpack battery pack 200 and the direct current charging device 300. Please refer to Figure 10 and Figure 18 , the output interface 320 further comprises a second locking member 322 between the second connecting members 321, when the handheld battery pack 210 is installed to the direct current charging device 300, the second locking member 322 is used to cooperate with the second locking member 260 of the handheld battery pack, so as to realize the connection locking of the handheld battery pack 200 and the direct current charging device 300. In the embodiment, the first locking member 312 and the second locking member 322 are provided as buckles, and the first locking member 250 and the second locking member 260 are provided as card slots capable of cooperating with the buckles.

[0268] Further, the DC charging device 300 further comprises a first trigger 313, the first trigger 313 is capable of driving the first locking member 312 to move from the locking position to the unlocking position, when the first locking member 312 is located at the locking position, the first locking member 312 cooperates with the first locking portion 250 to lock the DC charging device 300 and the backpack battery pack 200; when the first locking member 312 is located at the unlocking position, the first locking member 312 is disengaged from the first locking portion 250, the DC charging device 300 and the backpack battery pack 200 are unlocked. The DC charging device 300 further comprises a second trigger 323, the second trigger 323 is capable of driving the second locking member 322 to move from the locking position to the unlocking position, when the second locking member 322 is located at the locking position, the second locking member 322 cooperates with the second locking portion 260 to lock the DC charging device 300 and the handheld battery pack 210; when the second locking member 322 is located at the unlocking position, the second locking member 322 is disengaged from the second locking portion 260, the DC charging device 300 and the handheld battery pack 210 are unlocked. Optionally, the first trigger 313 and the second trigger 323 are set as buttons and 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 portion 250 and the second locking portion 260 can also be set in other forms, for example, the first locking member 312 and the second locking member 322 are set as a clamping groove, the first locking portion 250 and the second locking portion 260 are set as buckles cooperating with the clamping groove, and the present application does not limit this.

[0270] In other embodiments, since all the backpack battery packs in the battery pack system 20 have the same structure of the interface, all the handheld battery packs also have the same structure of the interface, and the backpack battery pack and the handheld battery pack can also be other forms of battery packs, such as Figure 20 As shown, the input interface can be installed with the backpack battery pack 200', the output interface can be installed with the handheld battery pack 210, and the DC charging device 300 can also be used to charge the handheld battery pack 210 with the backpack battery pack 200'.

[0271] The DC charging module 350 is configured to receive the electrical energy of the input interface 310 for conversion and transmission to the output interface 320, so that the backpack battery pack charges the handheld battery pack. Optionally, the DC charging module 350 is arranged in the housing 301. Please refer to Figure 21The direct current 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 direct current charging module 350 is a DC-DC (Direct Current-Direct Current) module. When the backpack battery pack 200 is installed on the input interface 310 and the handheld battery pack 210 is installed on the output interface 320, the direct current charging module 350 is used to convert the direct current power stored in the backpack battery pack 200 into direct current power for charging the handheld battery pack 210. Generally, the direct current charging module 350 is used for voltage conversion to convert the received voltage of the backpack battery pack 200 into an output voltage suitable for the handheld battery pack 210.

[0272] When the garden team goes out to work during the day and the power supply is not available, the existing backpack battery pack in the battery pack system can be directly used to carry a large-capacity backpack battery pack, and the handheld battery pack is charged by using the direct current charging device, which solves the power anxiety problem of the garden team when going out to work.

[0273] In order to carry lighter equipment as much as possible on the basis of meeting the power demand, as an embodiment, taking a two-person garden team consisting of worker A and worker B as an example, the garden team carries one backpack battery pack, two handheld battery packs and one direct current charging device charged by the alternating current power supply at night the day before, after reaching the work site, worker A and worker B use one handheld battery pack to install the corresponding power tool (such as a handheld blower, a grass trimmer or a pruning machine, etc.) to work, when any one handheld battery pack is insufficient, it can be installed on the direct current charging device to charge it by using the backpack battery pack, and after the power is fully charged, it can be used continuously to meet the use demand of continuous work. In this way, even in the scenario where there is no power socket at the work site, the power supply problem of the power tool system can still be effectively solved.

[0274] It should be noted that in order to meet the needs of more diverse working scenarios and longer working time, the garden team can also carry multiple backpack battery packs. Since the backpack battery pack can not only supply power to the power tool, but also supply power to the handheld battery pack, the garden team can use a part of the backpack battery pack as an energy storage pack for the handheld battery pack, and use the other backpack battery pack as a tool pack for the power tool, to meet the working demand in different use scenarios.

[0275] As a reference embodiment, still taking the two-person gardening team consisting of worker A and worker B as an example, the gardening team carries two backpack battery packs, three handheld battery packs, and a DC charging device that is fully charged by an AC power supply at night before the previous day, after arriving at the work site, worker A first installs the backpack battery pack on the automatic mower to let it go automatic mowing, and then uses a handheld battery pack to install it on the grass trimmer to trim the grass, worker B uses a handheld battery pack to install it on the trimmer to trim the branches, when the two handheld battery packs are insufficient, one of the handheld battery packs can be installed on the DC charging device, and the other backpack battery pack is used to charge it, after the power is fully charged, the other handheld battery pack is replaced to meet the continuous working requirements.

[0276] As mentioned above, the gardening team will often go to many work sites during the day's work, so the weight of the entire working system should not be too large, otherwise it is not conducive to the frequent carrying and carrying of the gardening team during the work process.

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

[0278] On the one hand, since the work site of the gardening team is usually outdoors, it is difficult to find an AC power supply; on the other hand, if the AC power supply is used to power the backpack battery pack and / or the handheld battery pack, a power conversion module for converting AC to DC (Alternating Current-Direct Current, AC to DC) needs to be set in the DC charging device. The weight and volume of the DC charging device will inevitably increase a lot, and the working system cannot be compact and light, which is not conducive to the work of the gardening team. In an 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 the handheld battery pack has a smaller rated capacity than the backpack battery pack, there is usually no need for the handheld battery pack to charge the backpack battery pack in actual work. Therefore, in an embodiment, the input interface is configured to only receive power input from the backpack battery pack and not output power externally, and the output interface is configured to only output power to the handheld battery pack and not receive external power input.

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

[0281] However, the charging speed of conventional battery packs is generally slow. The charging speed of battery packs is slow on the one hand due to the poor performance (such as charging rate) of single cells, and on the other hand due to the low charging power that the charger for charging the battery pack can provide. Currently, the chargers on the market generally need to take power from the mains socket. However, considering safety reasons, the power that the mains socket can provide is usually limited. For example, the power of the mains socket in North America is generally limited to 1.8KW, and the power of the mains socket in Europe is generally limited to 3.6KW. Due to the limited power of the mains socket, the chargers on the market cannot charge the battery pack at high power. Once the capacity of the high-capacity battery pack is depleted, the battery pack usually needs to be charged for a long time (much longer than the battery pack can provide).

[0282] Therefore, it is necessary to improve the charging speed of the battery pack from two aspects of improving the charging rate of the battery pack and improving the charging power of the charging device.

[0283] In some embodiments, the first charging rate of the backpack battery pack when charging the handheld battery pack is greater than or equal to the second charging rate of the mains when charging 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 output to the handheld battery pack to the rated capacity of the handheld battery pack, and the second charging rate of the mains to the handheld battery pack is the ratio of the maximum output power of the mains to the rated capacity of the handheld battery pack. When the conventional charger charges the handheld battery pack, the input power source is usually the mains, which is limited by the power of the mains, and the charging speed of the handheld battery pack is slow. The backpack battery pack provided in this embodiment uses the direct current energy storage module to charge the handheld battery pack, which can improve the charging power to the handheld battery pack and thus improve the charging speed.

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

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

[0287] Correspondingly, for the same battery pack, the first charging time required by the backpack battery pack to charge the handheld battery pack from an empty state to a full state is less than the second charging time required by the alternating current power source to charge the handheld battery pack from an empty state to a full 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 commercial power. The ratio of the maximum output power of the backpack battery pack to the maximum output power of the alternating current power source 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 alternating current power source can be 2 or 3. The maximum output power of the backpack battery pack 200 is greater than or equal to 1.8Kw; optionally, the maximum output power of the backpack battery pack is greater than or equal to 3Kw. For example, the maximum output power of the backpack battery pack is 3.6Kw, 4Kw, 5Kw, 6Kw, 7Kw, 10Kw, 12Kw or other. The output power of the commercial power is less than 1.8KW.

[0289] By using the backpack battery pack to charge the handheld battery pack, the problem of limited charging power and slow charging speed caused by the traditional charger obtaining commercial power from the socket can be solved. The output power of the backpack battery pack is greater than that of the commercial power, so that the charging speed of the handheld battery pack using the backpack battery pack is also greater than that of the handheld battery pack using the commercial power.

[0290] In some embodiments, the direct current charging device further comprises 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 it also ensures that the handheld battery pack can start discharging to the electric tool immediately after charging is completed.

[0291] Please refer to Figure 17 , Figure 18The heat dissipation device of the direct current charging device 300 comprises an air inlet and an air outlet. Specifically, the air inlet comprises two air inlets, i.e., a first air inlet 380a and a second air inlet 380b. The first air inlet 380a and the second air inlet 380b are both arranged on the shell 301. In the length direction a, the first air inlet 380a is located between the pair of first connecting portions 311, and the second air inlet 380b is located between the pair of second connecting portions 321.

[0292] Referring to Figure 22 and Figure 23 wherein Figure 22 is an internal structure diagram of the direct current charging device 300 after the shell 301 is removed. In the upper space of the direct current charging device 300 away from the lower part, a first air duct 381 corresponding to the input interface 310 is arranged. In the upper space of the direct current charging device 300 away from the lower part, a second air duct 382 corresponding to the output interface 320 is also arranged. The first air duct 381 and the second air duct 382b are arranged opposite to each other. The air inlet 381a of the first air duct 381 is connected to the first air inlet 380a, and the air inlet 382a of the second air duct 382 is connected to the second air inlet 380b. The air outlet 381b of the first air duct 381 and the air outlet 382b of the second air duct 382 are both located on one side of the shell 301 in the length direction a, and are both connected to the air outlet 301a arranged on one side of the shell 301 in the length direction a.

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

[0294] Taking the example of the backpack battery pack 200 charging the handheld battery pack 210 through the direct current charging device 300, when the backpack battery pack 200 and the handheld battery pack 210 are both mounted on the direct current charging device 300, as shown in 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 started, and the air flow enters the backpack battery pack 200 from the air inlet provided on the backpack battery pack 200, cools the battery cells contained in the backpack battery pack 200, and then flows out of the air outlet 270 provided on the backpack battery pack 200, and then flows into the air inlet 381a through the first air inlet 380 connected to the air outlet 270, passes through the shell of the first air duct 381, flows out of the first air duct 381 from the air outlet 381b, and flows out of the shell 301 from the air outlet 301a connected to the air outlet 381b. When the handheld battery pack 210 needs to be cooled, the second fan 382 is started, and the air flow enters the handheld battery pack 210 from the air inlet (not shown) provided on the handheld battery pack 200, cools the battery cells contained in the handheld battery pack 210, and then flows out of the air outlet 280 provided on the handheld battery pack 210, and then flows into the air inlet 382a through the second air inlet 380b connected to the air outlet 280, passes through the shell of the second air duct 382, flows out of the second air duct 382 from the air outlet 382b, and flows out of the shell 301 from the air outlet 301a connected to the air outlet 382b.

[0295] The first air duct and the second air duct are provided in the direct current charging device, so that the air flow for cooling the backpack battery pack and the handheld battery pack is not mixed, so that the cold and hot air flows are not mixed, and the cooling effect is better.

[0296] When the direct current charging device 300 is working, the electronic devices contained in the shell 301 generate a large amount of heat and also need to be cooled. The direct current charging device 300 further includes a third air duct 383, the shell of the third air duct 383 contains electronic devices (not shown), the third air duct 383 is arranged below the first air duct 381 and the second air duct 382, the air inlet (not shown) of the third air duct 383 is connected to the air inlet 301a arranged on one side of the shell 301 in the length direction a, and the air outlet 383b of the third air duct 383 is connected to the air outlet 301b arranged on the other side of the shell 301 in the length direction a. By 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 the same side air outlet.

[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 capable of installing both the backpack battery pack and the handheld battery pack. In the embodiment, the charging interfaces 361a and 361b have the same structure, that is, the charging interfaces 361a and 361b both include the structure of the first tool interface 111 and the third tool interface 113. In other words, the charging interfaces 361a and 361b both include the structure of the input interface 310 and the output interface 320. In other embodiments, the charging interface has the same structure as the input interface 310; and / or, the charging interface has the same structure as the output interface 320, which is not limited in the application.

[0303] When both of the charging interfaces 361a and 361b of the AC charging device 360 are installed with the battery packs (the battery packs can be two backpack battery packs, can be two handheld battery packs, or can be one backpack battery pack and one handheld battery pack), the AC charging device 360 obtains the access order and the remaining power of the two battery packs, and charges the battery packs according to the plugging order and the remaining power. The charging priority of the AC charging device 360 for the battery packs is that the priority of the plugging order is higher than that of the power. That is, the AC charging device 360 first determines the charging order of the battery packs according to the plugging order, and then determines the charging order of the battery packs according to the remaining power when the plugging orders are the same. Specifically, when the AC charging device 360 charges the battery packs, the AC charging device 360 first charges the battery pack that is plugged in first, and then charges the battery pack that is plugged in later. When the two battery packs are plugged into the AC charging device 360 at the same time, that is, the two battery packs are plugged into the AC charging device 360 after the AC charging device 360 is powered on, the AC charging device 360 obtains the remaining power of the two battery packs, and preferentially charges the battery pack with more remaining power. After the battery pack with more remaining power is fully charged, the battery pack with less remaining power is charged. If the remaining powers of the two battery packs are the same, the AC charging device 360 randomly selects one of the battery packs to charge.

[0304] When the AC charging device 360 is connected to the mains, the staff installs the empty battery pack on the AC charging device 360, and the AC charging device 360 charges the battery pack according to the installation order of the battery pack. Optionally, the battery pack that is plugged into the AC charging device 360 first is charged first. For example, after the AC charging device 360 is powered on, if the battery pack is installed on the charging interface 361a first, the AC charging device 360 charges the battery pack on the charging interface 361a first. When the battery pack on the charging interface 361a is being charged, the staff installs the battery pack on the charging interface 361b, and then the charger charges the battery pack on the charging interface 361b after the battery pack on the charging interface 361a is fully charged.

[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 further comprises a cabinet body 377 and a cover body 378, the cabinet body 377 encloses a receiving space for receiving the backpack battery pack and / or the handheld battery pack, and the cover body 378 is operable to open or close the receiving space, and the receiving space is closable, so that the backpack battery pack and / or the handheld battery pack can be protected by the charging cabinet 370 from water, dust, temperature control, etc., thereby improving the charging safety. Optionally, the cover body 378 is pivotally connected with the cabinet body 377.

[0312] In order to realize power transmission, the energy supply system further comprises a connecting device, the charging cabinet is provided with an input interface for receiving the output power of the AC charging device, and the connecting device is configured to connect the charging interface and the input interface to realize the transmission of the power output by the charging interface to the charging cabinet. In some embodiments, as shown in Figure 26 The energy supply system 30 further comprises a connecting device 390, and the charging cabinet 370 comprises an input interface 376, and the connecting device 390 is configured to connect the charging interface 361a and the input interface 376 to realize the transmission of the power output by the charging interface 361a to the charging cabinet 370.

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

[0314] Optionally, one end of the connecting device is fixedly connected with the charging cabinet, and the other end is detachably connected with the AC charging device; or one end of the connecting device is fixedly connected with the AC charging device, and the other end is detachably connected with the charging cabinet; or one end of the connecting device is detachably connected with the charging cabinet, and the other end is detachably connected with the AC charging device; the present application does not limit this.

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

[0316] Further, the adapter 393 comprises an adapter interface (not shown) for connecting with the AC charging device 360 or the charging cabinet 370. In the embodiment, the adapter interface 393a is configured in the same structure as the aforementioned handheld battery pack interface, so that the adapter interface 393a can be detachably connected with any charging interface 361a or any charging cabinet interface 361b. Of course, the adapter interface can also be configured in the same structure as the backpack battery pack interface, or configured in the structure of a cable head, and the charging interface interface or the charging cabinet interface connected with the adapter interface is configured in the form of a socket matched with the cable head, without limitation.

[0317] Further, the connecting device 390 further comprises a cable head 391a connected with the other end of the cable 391, and the cable head 391a is used for connecting with 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 fixed connection or detachable connection.

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

[0319] Specifically, the charging power of the charging cabinet 370 is provided by the AC charging device 360, so it is necessary to send the parameters of the charging cabinet 370 itself, i.e., the first electrical parameter information to the AC charging device 360, and receive the communication information of the AC charging device 360 including various electrical parameters and control instructions provided by the AC charging device 360, so as to be able to manage the charging cabinet 370 based on these information.

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

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

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

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

[0324] Further, the preset lower limit threshold and upper limit threshold of the charging low temperature can be realized by software or hardware. For example, the hardware can be a simple comparator or a hardware circuit. The software can be a preset threshold in the first management module 372 and a comparison result based on the threshold and the actual temperature to control whether to heat. For example, the first management module 372 is preset with a lower limit threshold and an upper limit threshold of the charging low temperature. The lower limit threshold is a lower limit condition for enabling the heating module, and the upper limit threshold is an upper limit condition for stopping the heating module. That is, when the first management module 372 determines that the real-time temperature of the charging cabinet 370 is lower than the lower limit threshold of the charging low temperature, a heating instruction is generated to the heating module, and the heating module performs a heating operation in response to the heating instruction. When the first management module 372 determines that the real-time temperature of the charging cabinet 370 is higher than the upper limit threshold of the charging low temperature, a stop heating instruction is generated to the heating module, and the heating module performs a stop heating operation in response to the stop heating instruction.

[0325] In some embodiments, the charging cabinet 370 further comprises a heating fan (not shown) matched with the heating module. When the heating module is enabled, the heating operation can be performed on the heat dissipation fins on the inner side of the bottom of the cabinet body 377. In order to realize the temperature balance in the charging cabinet 370, the heating fan is usually matched with the heating module, that is, when the heating module performs the heating operation, the heating fan is turned on at the same time to blow the hot air of the heated heat dissipation fins to each part in the charging cabinet 370, thereby improving the efficiency and effect of the heating.

[0326] In some embodiments, the charging cabinet 370 further comprises a cooling module (not shown) arranged at least partially in the cabinet body to avoid the risk of low charging efficiency and insecurity caused by high ambient temperature, high temperature of the battery pack during charging, and high temperature of the charging cabinet itself. Optionally, the charging cabinet 370 further comprises a cooling fan (not shown) matched with the cooling module. The cooling fan is used to generate airflow to cool the backpack battery pack and / or the handheld battery pack. The cooling fan and the heating fan can be the same fan or different fans.

[0327] Similar to the heating module, a preset charging high temperature lower threshold is usually set, which can be realized by software or hardware, such as using a simple comparator or setting the above threshold in a hardware circuit, or by software, such as presetting the above threshold in the first management module 372 and controlling whether cooling is needed based on the comparison result of the threshold and the actual temperature. Taking the software as an example, the preset charging high temperature lower threshold is preset in the first management module 372, which is the lower limit condition for which the cooling module needs to be enabled. That is, when the first management module 372 judges that the detected real-time temperature of the charging cabinet 370 is higher than the charging high temperature lower threshold, a cooling instruction is generated to the cooling module, and the cooling module performs a cooling operation in response to the cooling instruction.

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

[0329] In some embodiments, the cooling module can also stop in response to the activation of the heating module. That is, during the execution of the cooling operation, the first management module 372 generates a heating instruction, which means that there is no need to cool any more, and a stop cooling instruction is generated accordingly to stop the action of the cooling module. It can be understood that the cooling module can perform a cooling operation in response to any one of the activation of the heating module and the reaching of the preset charging high temperature lower threshold.

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

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

[0332] In some embodiments, as shown in Figure 25 Optionally, the display module 373 is arranged on the cover 378 or any other suitable position on the charging cabinet 370, which is not limited here.

[0333] The display module 373 is configured to display at least one of the connection state of the AC charging device 360, the power supply state of the AC charging device 360, the charging state of the AC charging device 360 to the charging cabinet 370, the access state or the charging state or the charging time of each charging cabinet interface 371a, 371b, 371c and 371d in the charging cabinet 370, the electrical parameters of the battery pack accessed by each charging cabinet interface 371a, 371b, 371c and 371d, the continuous working time of the charging cabinet 370 or the AC charging device 360, the date, the temperature, the communication state, the cooling state, and the heating state. The specific display information is not limited thereto.

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

[0335] In some embodiments, the locking module comprises at least one of a mechanical locking mode and an electric locking mode; the mechanical locking mode usually comprises a mechanical lock; and the electric locking mode usually comprises an electric lock.

[0336] Specifically, when the locking module adopts the mechanical locking mode, as shown in FIG. 6A, the locking module comprises a first locking ring 378a arranged on the cover 378 and a second locking ring 377a arranged on the cabinet 377. When the lock passes through the first locking ring 378a and the second locking ring 377a and is buckled, the cover 378 and the cabinet 377 are locked. Alternatively, when the locking module adopts the electric locking mode, the locking module locks the cabinet 377 and the cover 378 of the charging cabinet in response to the locking control signal sent by the first management module 372. Figure 26

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

[0338] In some embodiments, the charging cabinet 370 is further provided with a trigger key (not shown) configured to activate the charging cabinet 370 for further charging work. When the trigger key is triggered externally, the charging cabinet 370 is activated, and the display module 373 is lit at the same time. The trigger key is optionally arranged on the cabinet 377 or the cover 378.

[0339] ​Specifically, the trigger key can send an activation signal to the first management module 372 in response to an external trigger; the first management module 372 detects the power supply state of the AC charging device 360 connected to the charging cabinet 370 in response to the activation signal; accordingly, when the first management module 372 judges that the power supply state represents that the AC charging device 360 allows the charging power to be output to the charging cabinet 370, it controls to continuously output the power supply signal to realize the power supply self-locking of the first management module 372; in an embodiment, considering that the charging cabinet 370 itself has no stored power, the power supply self-locking of the first management module 372 is first powered by one of the battery packs on the charging cabinet 370, and after a certain period of time, to avoid unnecessary power loss of the battery pack, it will be converted to be powered by the AC charging device 360. When the first management module 372 judges that the power supply state represents that the AC charging device 360 does not allow the charging power to be output to the charging cabinet 370, it controls to stop outputting the power supply signal after a first preset time to disconnect the power supply of the first management module 372.

[0340] In some embodiments, when the first management module 372 judges that all charging cabinet interfaces have no charging demand, the charging cabinet 370 fails, or the continuous working time of the charging cabinet 370 exceeds a second preset time, it controls to stop outputting the power supply signal to disconnect the power supply of the first management module 372. That is, when the charging cabinet 370 has the above situation, it is not necessary to continue charging or not suitable to continue charging, then stop the charging operation to prevent unnecessary loss of the battery pack with full power, or to ensure the charging safety of the charging cabinet.

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

[0342] Continuing to refer to Figure 27 , the AC charging device 360 further comprises an input power interface 362 and a main control module 363. The main control module 363 is used to output a power supply processing control signal to the charging circuit 364 when detecting that an input power is connected.

[0343] In some embodiments, the input power at least includes an AC input power, such as Figure 26 As shown, the AC charging device 360 connects the AC input power from the input power interface 362. In addition, the input power can also include but is not limited to a DC input power, and the AC charging device can connect the DC input power from the input power interface.

[0344] In some embodiments, the input power source comprises a direct current input power source, and the AC charging device 360 can access the direct current input power source through the charging interface 361. The AC charging device 360 is further configured to receive the direct current input power source accessed by the charging interface 361 and output charging power to the charging cabinet 370. Specifically, for example, a direct current power source connected to a charging interface 361 can serve as a direct current input power source to charge the charging cabinet 370 connected to the AC charging device 360.

[0345] In some embodiments, the master module 363 is further configured to generate a charging control signal according to the second electrical parameter information of the AC charging device 360 and the first electrical parameter information of the charging cabinet 370, to control the output of charging power to the charging interface 361 and / or the output of charging power to the charging cabinet 370.

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

[0347] In some embodiments, the first electrical parameter information can at least include a parameter representing the load state of the charging cabinet 370, and the second electrical parameter information at least includes a parameter representing the load state of the charging interface 361. The charging control signal can at least include a charging priority signal; the master module 363 is further configured to generate a charging priority signal for the charging interface 361 and / or the charging cabinet 371 according to the parameter representing the load state of the charging interface 361 and the parameter representing the load state of the charging cabinet 371, 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] In some embodiments, the charging priority signal generally represents a preset priority order; the preset priority order at least includes the order of the charging interface 361 and the charging cabinet interface 371, the insertion order of the battery pack, the order of the capacity of the battery pack from high to low or from low to high, the order of the remaining power of the battery pack from high to low or from low to high, the order of the charging time of the battery pack from long to short or from short to long, the order of the charging rate of the battery pack from high to low or from low to high, the order of the temperature of the battery pack from high to low or from low to high, etc. The priority order can be set according to actual needs, which is not limited here. In particular, the priority order can also be set by wireless communication using a mobile device for remote control.

[0349] In some embodiments, the master module 363 can also, but not limited to, be configured 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, the fault detection and processing of the AC charging device 360 and / or the charging cabinet 370, etc.

[0350] Specifically, to ensure the AC charging device 360 and the charging cabinet 370 work in coordination, it is necessary to obtain the electrical parameters of the AC charging device 360 and the charging cabinet 370 in real time, so as to further manage and control based on the electrical parameters. When the AC charging device 360 and the charging cabinet 370 work in coordination, the charging control is performed by the AC charging device 360, i.e., at least one of the following is controlled: the charging mode of the AC charging device 360, the power output to each charging interface 361a, 361b of the AC charging device 360, and the charging cabinet 370, and the fault detection and processing of the AC charging device 360 and / or the charging cabinet 370.

[0351] In some embodiments, the energy supply system 30 can further include a wireless communication module, which is optionally arranged in the AC charging device 360 or the charging cabinet 370. Taking the example that the wireless communication module 379 is arranged in the AC charging device 360, the master module 363 is further configured to control at least one of the following: receiving the control instruction sent by the mobile device through the wireless communication module 379, and outputting the corresponding charging control signal according to the control instruction; receiving the program update instruction sent by the mobile device through the wireless communication module 379, and updating the program of the AC charging device 360 and / or the charging cabinet 370 according to the program update instruction; and sending the device parameter information of at least one of the battery pack, the AC charging device 360 and the charging cabinet 370 to the mobile device through the wireless communication module 379.

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

[0353] The AC charging device 360 in the energy supply system 30 provided by the embodiment can detachably connect the backpack battery pack and / or the 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 the charging power provided by the AC charging device 360 directly through the charging interface 361 of the AC charging device 360, or can receive the charging power provided by the AC charging device 360 through the charging cabinet 370, and the flexibility of charging is high. The charging cabinet 370 does not need to additionally set a charging module, which reduces the volume and cost of the charging cabinet 370, and also reduces unnecessary power loss in the charging process. In addition, the charging cabinet 370 expands the number of charging interfaces, so that the user can charge multiple backpack battery packs and / or handheld battery packs at a time to meet the power demand of the next day.

[0354] Figure 28 The circuit structure schematic diagram of the energy supply system provided by another embodiment of the present application is shown. 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 figure, but the present application is not limited thereto.

[0355] The AC charging device 360a includes a charging interface 361a and a master control module 363a. In an embodiment, the AC charging device 360a can further include a charging output interface 366a, which is used to connect the first charging cabinet 370a or the second charging cabinet 370b. The first charging cabinet 370a and the second charging cabinet 370b can selectively connect the charging interface 361a or the charging output interface 366a to obtain power.

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

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

[0358] In some embodiments, the second charging cabinet 370b is configured to be connected with the charging interface 361a and / or the charging output interface 366a of the AC charging device 360a to receive the charging power provided by the AC charging device 360a. In other embodiments, the second charging cabinet 370b can also be connected with the output interface of the first charging cabinet 370a to receive the charging power provided by the AC charging device 360a, where the output interface of the first charging cabinet 370a can be configured as the 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 configured to establish a communication connection with the master module 363a of the AC charging device 360a to receive the second electrical parameter information and the charging control signal sent by the master module 363a, and send the third electrical parameter of the second charging cabinet 370b to the master module 363a or through the first management module 372a of the first charging cabinet 370a to the master module 363a, and send the corresponding charging control instruction to control the charging process of the second charging cabinet 370b.

[0360] Specifically, in some embodiments, the second management module 372b is configured to control at least one of the following according to 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 work of the second charging cabinet 370b, fault detection feedback and processing.

[0361] The energy supply system 30 of the embodiment includes the AC charging device 360a, the first charging cabinet 370a, and at least one second charging cabinet 370b. The at least one second charging cabinet 370b can be connected with the charging interface 361a of the first charging cabinet 370a to receive the charging power provided by the AC charging device 360a, or can be directly connected with the charger output interface 366a of the AC charging device 360a to receive the charging power provided by the AC charging device 360a, which can further improve flexibility. The charging power of the first charging cabinet 370a and the second charging cabinet 370b can be uniformly provided by the AC charging device 360a, so that the corresponding charging circuit does not need to be arranged in the first charging cabinet 370a and the second charging cabinet 370b, thereby simplifying the electrical design of the first charging cabinet 370a and the second charging cabinet 370b, avoiding the redundancy of the charging circuit, and further reducing the cost of the charging system. In addition, the power distribution of the corresponding charging cabinet charging interface of the first charging cabinet 370a and the second charging cabinet 370b is respectively realized by the corresponding first management module 372a and the first management module 372b, which can improve the accuracy and timeliness of power distribution management.

[0362] In some embodiments, as Figure 29As shown, the working system 1 further comprises a trolley 50, the trolley 50 comprises a trolley body 500 and a roller 510 supporting the trolley body 500, the trolley 50 is used for transporting at least one of the power tool system 10, the battery pack system 20 and the energy supply system 30.

[0363] Since the garden maintenance work often needs to change the working site, the trolley 50 can solve the transportation problem of the working system 1, and facilitate the user to move various equipment.

[0364] Specifically, the trolley body 500 comprises a bracket 501 and a push rod 502, the bracket 501 is configured to place various equipment in the working system 1, the bracket 501 is connected with the roller 510, and the push rod 502 is connected with the bracket 501 at an angle. In this embodiment, the extension direction of the push rod 502 is arranged perpendicularly to the extension direction of the bracket 501.

[0365] Further, the trolley body 500 further comprises a handrail 503, the handrail 503 is connected with the push rod 502. Optionally, the handrail 503 is pivotally connected with the push rod 502, and the user can convert the angle of the handrail to achieve comfortable pushing.

[0366] The application further provides a working system, the working system comprises a power supply system and a power tool system, the power supply system comprises a battery pack system and an energy supply system.

[0367] The battery pack system comprises a first type battery pack and a second type battery pack, the first type battery pack is configured to be detachably mounted to a first type power tool to supply power for the first type power tool, and the second type battery pack is configured to be detachably mounted to a second type power tool to supply power for the second type power tool; wherein the rated capacity of the first type battery pack ranges from 550-3000Wh, and the weight of the first type battery pack ranges from 4-12Kg.

[0368] The energy supply system comprises a direct current charging device, the direct current charging device comprises an input interface and an output interface, the input interface is configured to detachably mount the first type battery pack, and the output interface is configured to detachably mount the first type battery pack.

[0369] The direct current charging device further comprises at least one direct current charging module, the direct current charging module is configured to convert the electric energy of the first type battery pack and transmit the electric energy to the second type battery pack, so as to charge the second type battery pack by the first type battery pack.

[0370] When the work team goes out to work with the above work system, the first type battery pack can supply power for the electric tool, in other words, the first type battery pack can be used as a tool pack, and at the same time, the first type battery pack can be used as an energy storage pack to supply power for the second type battery pack. In this way, the second type battery pack can be timely charged, so as to realize the recycling of a small number of second type battery packs, and realize the long-time work of the electric tool system without carrying and purchasing a large number of battery packs, thereby improving the work efficiency. In addition, the first type battery pack has large power and light weight, which can realize the sufficient charging of the second type battery pack and the convenient carrying and use. Moreover, the user can use the second type battery pack more, and the second type battery pack can be directly installed to the second type electric tool for use without being carried and used, so that the user uses more portable and lower cost.

[0371] Specifically, the specific structure of the power supply system and the electric tool system and the mechanical and electrical connection relationship therebetween can be referred to the accompanying drawings Figure 2 to Figure 28 and the corresponding foregoing expressions, which will not be repeated here. It should be noted that the first type battery pack can be configured as a backpack battery pack, and the second type battery pack can be configured as a handheld battery pack.

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

[0373] The direct current charging device further includes a direct current charging module for converting the electric energy of the first type battery pack and transmitting it to the second type battery pack, so as to charge the second type battery pack with the first type battery pack. Wherein, the direct current charging device is only provided with an input interface for receiving power input.

[0374] The direct current charging device in the above energy supply system is only provided with an input interface for receiving power input, without other direct current input interface and / or alternating current input interface, which simplifies the power conversion module, so that the direct current charging device is compact, light and portable, and low in cost.

[0375] In some embodiments, as Figure 30 shown, the energy supply system 30' includes a direct current charging device 300'. Specifically, the specific structure of the direct current charging device can be referred to the accompanying drawings Figure 17 to Figure 23 and the corresponding foregoing expressions, which will not be repeated here. It should be noted that the first type battery pack can be configured as the aforementioned backpack battery pack, and the second type battery pack can be configured as the aforementioned handheld battery pack.

[0376] Further, the energy supply system further comprises at least one AC charging device, the AC charging device comprising an input power interface configured to be connected with an AC power source, at least one charging interface configured to detachably mount the first type battery pack and / or the second type battery pack, and at least one AC charging module configured to be connected with the input power interface and to convert AC power into DC power and output the DC power to the charging interface to charge the first type battery pack and / or the second type battery pack.

[0377] The energy supply system comprises the DC charging device and the AC charging device, so that the working team can only carry the DC charging device when working in the daytime, and use the backpack battery pack as an energy storage pack to supply power to the handheld battery pack to realize long-time working. After returning home in the evening, the backpack battery pack and / or the handheld battery pack can be charged by the AC charging device to meet the power requirement of the next day. In this way, the working team can easily carry and transport the devices without carrying too many devices in the daytime.

[0378] In some embodiments, continuing to refer to Figure 30 , the energy supply system 30’ further comprises an AC charging device 360’. Specifically, the specific structure of the AC charging device can refer to the attached Figure 23 , and the corresponding foregoing expressions will not be repeated here.

[0379] Further, the energy supply system further comprises a charging cabinet, the charging cabinet comprising at least one charging cabinet interface configured to be detachably connected with the first type battery pack and / or the second type battery pack, and at least one charging module configured to be connected with the charging interface and to transmit the power output by the charging interface to the charging cabinet to charge the first type battery pack and / or the second type battery pack.

[0380] The energy supply system comprises the charging cabinet, which can expand the charging interface to meet the charging requirement of more battery packs. When the working team returns home in the evening, the AC charging device and the charging cabinet can be used to charge the battery packs with insufficient power to meet the working requirement in the next day.

[0381] In some embodiments, continuing to refer to Figure 30 , the energy supply system 30’ further comprises a charging cabinet 370’. Specifically, the specific structure of the charging cabinet and the connection between the charging cabinet and the AC charging device can refer to the attached Figure 23 to Figure 28 , and the corresponding foregoing expressions will not be repeated here.

[0382] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0383] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the application should be subject to the appended claims.

Claims

1. A power supply system characterized by comprising: The battery pack system and the energy supply system are provided. The battery pack system comprises a first type of battery pack and a second type of battery pack, the first type of battery pack is configured to be detachably mounted to a first type of electric tool to power it, and the second type of battery pack is configured to be detachably mounted to a second type of electric tool to power it; wherein the rated capacity to weight ratio of the first type of battery pack ranges from 60-300Wh / Kg, and the maximum allowable charging rate of the second type of battery pack is not less than 7C. The energy supply system comprises a direct current charging device, the direct current charging device comprises 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 direct current charging device further comprises at least one direct current charging module, the direct current charging module is configured to receive the electrical energy of the input interface for conversion and transmission 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 a user.

3. The power supply system of claim 1, wherein, The discharge rate of the first type of battery pack is greater than or equal to 2C; and / or, the maximum output power of the first type of battery pack is greater than or equal to 2KW.

4. The power supply system of claim 1, wherein, When the second type of battery pack is charged at a rate of 3C, the temperature rise of the second type of battery pack does not exceed 14℃ when the ambient temperature is about 20℃; and / or when the second type of battery pack is charged at a rate of 5C, the temperature rise of the second type of battery pack does not exceed 19℃ when the ambient temperature is about 20℃; and / or when the second type of battery pack is charged at a rate of 10C, the temperature rise of the second type of battery pack does not exceed 24℃ when the ambient temperature is about 25℃.

5. The power supply system of claim 1, wherein, The internal resistance of the single battery cell in the second type of battery pack is less than or equal to 3mΩ; and / or, the weight of the second type of battery pack ranges from 1-3.5Kg.

6. The power supply system of claim 1, wherein, The time required for the second type of battery pack to charge from empty to full is less than or equal to the time required for the second type of battery pack to discharge from full to empty.

7. The power supply system of claim 1, wherein, The rated capacity to weight ratio of the first type of battery pack is greater than the rated capacity to weight ratio of the second type of battery pack.

8. The power supply system of claim 1, wherein, The maximum allowable charging rate of the second type of battery pack is greater than the maximum allowable charging rate of the first type of battery pack.

9. The power supply system of claim 1, wherein, The internal resistance of the single battery cell in the second type of battery pack is less than the internal resistance of the single battery cell in the first type of battery pack.

10. The power supply system of claim 1, wherein, The rated capacity of the first type of battery pack is defined as the first capacity, the rated capacity of the second type of battery pack is defined as the second capacity, and the ratio of the first capacity to the second capacity is greater than or equal to 2.

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