Charging device and charging system applicable to electric tool

Abstract

Disclosed in the present application are a charging device and charging system applicable to an electric tool. The charging device comprises: a shell assembly; a plurality of terminal electrode sheets, which are provided on the shell assembly, wherein the plurality of terminal electrode sheets comprise a first terminal electrode sheet and a second terminal electrode sheet; and a control module, which is configured to connect to the first terminal electrode sheet and the second terminal electrode sheet, wherein the control module is configured to, upon detecting that there is a voltage crossing the first terminal electrode sheet and there is no voltage crossing the second terminal electrode sheet, control the first terminal electrode sheet to output a voltage, and upon detecting that there are voltages crossing both the first terminal electrode sheet and the second terminal electrode sheet, control the second terminal electrode sheet to output a voltage. By using the technical solution, a charging device and a charging system which have a wider application range and are applicable to an electric tool can be provided.

Description

Charging equipment and charging systems for power tools

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 20, 2023, with application number 202311553612.9, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a charging device and a charging system suitable for electric tools. Background Art

[0003] Power tools such as drills, circular saws, sanders, and lawn mowers typically use battery packs as their energy source, making them environmentally friendly. Battery packs can store a certain amount of power, and when they run low, they need to be recharged using a charger.

[0004] Currently, most battery packs are single-port battery packs, meaning their charging and discharge ports are the same port. Therefore, most charging devices only support single-port battery packs. For some heterogeneous battery packs, meaning their charging and discharge ports are different ports, you need to use the corresponding charging device to charge them.

[0005] This section provides background information related to the present application which is not necessarily prior art.

[0006] Summary of the Invention

[0007] The present application provides a charging device and a charging system suitable for power tools with a wider range of applications.

[0008] This application adopts the following technical solutions:

[0009] A charging device suitable for an electric tool includes: a housing assembly; a plurality of terminal pole pieces, arranged on the housing assembly, for contacting the port of a battery pack; wherein the plurality of terminal pole pieces include a first terminal pole piece and a second terminal pole piece; a control module, arranged to be connected to the first terminal pole piece and the second terminal pole piece; the control module is arranged to: when it is detected that there is voltage on the first terminal pole piece and no voltage on the second terminal pole piece, control the first terminal pole piece to output voltage; when it is detected that there is voltage on both the first terminal pole piece and the second terminal pole piece, control the second terminal pole piece to output voltage.

[0010] In some embodiments, the battery pack includes a first battery pack. When the charging device is connected to the first battery pack, there is a voltage on the first terminal plate, and there is no voltage on the second terminal plate.

[0011] In some embodiments, the battery pack includes a second battery pack, and when the charging device is connected to the second battery pack, voltage exists on both the first terminal plate and the second terminal plate.

[0012] In some embodiments, when the control module detects that there is no voltage on both the first terminal electrode and the second terminal electrode, the control module controls the first terminal electrode and the second terminal electrode to not output voltage.

[0013] In some embodiments, the charging device further includes a height adjustment assembly, which is disposed on the housing assembly and includes a first height adjustment structure and a second height adjustment structure.

[0014] In some embodiments, the first height adjustment structure and the second height adjustment structure are connected.

[0015] In some embodiments, the plurality of terminal poles include a third terminal pole, which is disposed on the housing assembly and surrounded by the first height adjustment structure, and the height of the third terminal pole is the same as that of the first terminal pole.

[0016] In some embodiments, the second terminal electrode is disposed on the second height adjustment structure, and the height of the first terminal electrode is higher than the sum of the heights of the second terminal electrode and the second height adjustment structure. In some embodiments, a groove is disposed on the housing assembly, and the groove matches the second terminal electrode.

[0017] In some embodiments, when the charging device is connected to the first battery pack, the first terminal pole piece contacts the first battery pack, the first height adjustment structure is pressed downward, driving the height adjustment assembly to be pressed downward, and the second terminal pole piece is pressed into the groove, so that the second terminal pole piece does not contact the first battery pack.

[0018] In some embodiments, when the charging device is connected to the second battery pack, the first terminal electrode contacts the second battery pack, and the height of the height adjustment assembly remains unchanged, so that the second terminal electrode contacts the second battery pack.

[0019] In some embodiments, the plurality of terminal electrodes further include a fourth terminal electrode, and a height of the fourth terminal electrode is the same as a height of the first terminal electrode.

[0020] In some embodiments, the second terminal electrode is an L-shaped electrode.

[0021] In some embodiments, the second terminal electrode includes a side wall terminal electrode and a top wall terminal electrode, and at least a portion of the top wall terminal electrode is opposite to the groove on the housing assembly.

[0022] In some embodiments, the first battery pack is a same-port battery pack, and the second battery pack is a different-port battery pack.

[0023] In some embodiments, a charging device suitable for an electric tool includes: a housing assembly; a plurality of terminal poles, arranged on the housing assembly; wherein the plurality of terminal poles include a first terminal pole and a second terminal pole; the first terminal pole is used to be connected to the discharge positive port of the battery pack, and the second terminal pole is used to be connected to the charging positive port of the battery pack; the current flowing through the charging positive port is less than the current flowing through the discharge positive port.

[0024] In some embodiments, the battery pack is a heterogeneous battery pack.

[0025] In some embodiments, a charging system suitable for an electric tool includes: a battery pack and a charging device for charging the battery pack, the battery pack including a first battery pack and / or a second battery pack; wherein the charging device includes: a housing assembly; a plurality of terminal poles, arranged on the housing assembly; wherein the plurality of terminal poles include a first terminal pole and a second terminal pole; a control module, configured to be connected to the first terminal pole and the second terminal pole; when the charging device is connected to the first battery pack, the control module detects that there is voltage on the first terminal pole and no voltage on the second terminal pole, and the control module controls the first terminal pole to output voltage; when the charging device is connected to the second battery pack, the control module detects that there is voltage on both the first terminal pole and the second terminal pole, and the control module controls the second terminal pole to output voltage.

[0026] In some embodiments, the charging device further includes a height adjustment assembly, which is disposed on the housing assembly and includes a first height adjustment structure and a second height adjustment structure; the second terminal pole piece is disposed on the second height adjustment structure.

[0027] In some embodiments, a groove matching the second terminal electrode is provided on the housing assembly; when the charging device is connected to the first battery pack, the first terminal electrode contacts the first battery pack, and the second height adjustment structure is pressed into the groove so that the second terminal electrode does not contact the first battery pack.

[0028] This application detects the voltage conditions of the first terminal pole piece and the second terminal pole piece through the control module of the charging device, and controls the output voltage of the first terminal pole piece or the second terminal pole piece based on the detection result, so that the charging device can charge a variety of battery packs and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a charging device according to an embodiment of the present invention that is applicable to battery packs of various power tools;

[0030] FIG2 is a perspective view of a charging device according to an embodiment;

[0031] FIG3 is a schematic diagram of a charging control circuit of the charging device in FIG2 ;

[0032] FIG4 is a perspective view of multiple terminal pieces of the charging device in FIG2 ;

[0033] FIG5 is a front view of multiple terminal pieces of the charging device in FIG2 ;

[0034] FIG. 6 is a top view of the charging device in FIG. 2 . DETAILED DESCRIPTION

[0035] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0036] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0037] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0038] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0039] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0040] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0041] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0042] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. Where a unit "controller," "processor," "central processing unit," "CPU," or "MCU" is used to perform a particular function, unless otherwise specified, the function may be performed by a single unit or multiple units.

[0043] In this application, the terms "device", "module" or "unit" can be implemented in the form of hardware or software to achieve specific functions.

[0044] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0045] Since the charging current of the battery pack is small but the safety risk is high when charging, and the discharge current is large but the safety risk is low when discharging, the battery pack needs to be protected during charging. For example, a MOS tube or fuse active protection can be added to the battery pack during charging. However, adding these safety measures will affect the discharge capacity of the battery pack. Therefore, based on the same-port battery pack, a different-port battery pack is produced. The charging port and discharge port of the same-port battery pack are the same port, while the charging port and discharge port of the different-port battery pack are different ports. Different charging devices are required to charge the two. Based on this, the present application proposes a charging device that can be used to charge both same-port battery packs and different-port battery packs, with a wider range of applications.

[0046] This application proposes a charging device 100 capable of charging battery packs 300 used in various types of power tools, wherein the battery packs 300 may be either single-port or double-port battery packs. FIG1 illustrates several common power tools, such as an electric drill 200a, a chainsaw 200b, a lawn mower 200c, and a hair dryer 200d. It should be noted that the power tool 200 may also be a handheld power tool, such as a drill, a pruner, or a sander. Alternatively, the power tool 200 may also be a benchtop tool, such as a table saw or a miter saw. Alternatively, the power tool 200 may also be a push-type power tool, such as a push-type lawn mower or a push-type snow blower. Alternatively, the power tool 200 may also be a ride-on power tool, such as a ride-on lawn mower, a ride-on vehicle, or an all-terrain vehicle. Alternatively, the power tool 200 may also be a robotic tool, such as a robotic lawn mower or a robotic snow blower. In some embodiments, the power tool 200 may also be a gardening tool, such as a pruner, a hair dryer, a lawn mower, a chain saw, etc. Alternatively, the power tool 200 may also be a decoration tool, such as a screwdriver, a nail gun, a circular saw, a sander, etc. In some embodiments, the power tool 200 may also be a vegetation care tool, such as a lawn mower, a lawn mower, a pruner, a chain saw, etc. Alternatively, the power tool 200 may also be a cleaning tool, such as a hair dryer, a snow blower, a cleaning machine, etc. Alternatively, the power tool 200 may also be a drilling tool, such as a drill, a screwdriver, a wrench, an electric hammer, etc. Alternatively, the power tool 200 may also be a sawing tool, such as a reciprocating saw, a jig saw, a circular saw, etc. Alternatively, the power tool 200 may also be a grinding tool, such as an angle grinder, a sander, etc.

[0047] In order to facilitate the description of the technical solution, the following are defined as shown in Figure 2: front side, rear side, left side, right side, top side and bottom side. As shown in Figures 2 and 3, the charging device 100 includes a shell assembly 10, a plurality of terminal pole pieces 11 and a control module 12. Among them, a plurality of terminal pole pieces 11 are arranged on the shell assembly 10, and a plurality of terminal pole pieces 11 are arranged on the upper side surface of the shell assembly 10 for contacting the port of the battery pack. Specifically, the battery pack is pluggable in contact with the plurality of terminal pole pieces. The plurality of terminal pole pieces 11 include a first terminal pole piece 111 and a second terminal pole piece 112, and the control module 12 is connected to both the first terminal pole piece 111 and the second terminal pole piece 112. Optionally, the charging device 100 can be a charger or an adapter, and the charging device 100 is used to charge the first battery pack and the second battery pack. Among them, the first battery pack is a same-port battery pack, and the second battery pack is a different-port battery pack. The same-port battery pack and the different-port battery pack can be battery packs with a rated voltage of 20V or battery packs with other rated voltages, which is not limited in this application.

[0048] As shown in FIG3 , the charging device 100 is internally provided with a charging control circuit 1000. The charging control circuit 1000 is capable of controlling at least whether the first terminal plate 111 and the second terminal plate 112 output voltage. In some embodiments, the charging control circuit 1000 includes at least a control module 12, a first terminal plate 111a, and a second terminal plate 112a. The first terminal plate 111a corresponds to the first terminal plate 111, and the second terminal plate 1112a corresponds to the second terminal plate 112. When the control module 12 detects that voltage is present on the first terminal plate 111 (i.e., the first terminal plate 111a) and no voltage is present on the second terminal plate 112 (i.e., the second terminal plate 112a), the control module 12 controls the first terminal plate 111 to output voltage. When the control module 12 detects that voltage is present on both the first terminal plate 111 and the second terminal plate 112, the control module 12 controls the second terminal plate 112 to output voltage.

[0049] As shown in FIG3 , the charging control circuit 1000 further includes a first identification module 121, a second identification module 122, a first switch 123, a second switch 124, a first switch control module 125, a second switch control module 126, and an AC-DC conversion module 127. The control module 12 is connected to the first terminal module 111a via the first identification module 121. Specifically, one end of the first identification module 121 is connected to the control module 12, while the other end of the first identification module 121 is connected to the first terminal module 111a. The control module 12 is connected to the second terminal module 112a via the second identification module 122. Specifically, one end of the second identification module 122 is connected to the control module 12, while the other end of the second identification module 122 is connected to the second terminal module 112a. One end of the first switch 123 is connected to the AC-DC conversion module 127, while the other end of the first switch 123 is connected to the first terminal module 111a. One end of the second switch 124 is also connected to the AC-DC conversion module 127, while the other end of the second switch 124 is connected to the second terminal module 112a. The first switch control module 125 is connected to the control module 12 and controls the opening and closing of the first switch 123 based on the signal of the control module 12; the second switch control module 126 is also connected to the control module 12 and controls the opening and closing of the second switch 124 based on the signal of the control module 12. The AC-DC conversion module 127 is used to convert the incoming mains power or other forms of AC power into DC power. In some embodiments, the AC-DC conversion module 127 includes an AC-DC conversion circuit, such as an inverter circuit. The AC-DC conversion circuit can use a bridge rectifier circuit. The opening of the first switch 123 and the opening of the second switch 124 correspond to the switches being in the off state, and the closing of the first switch 123 and the closing of the second switch 124 correspond to the switches being in the on state.

[0050] In some embodiments, the first terminal electrode 111 is a positive electrode for charging a first battery pack, and the second terminal electrode 112 is a positive electrode for charging a second battery pack.

[0051] When the charging device 100 is connected to the first battery pack, voltage is present on the first terminal plate 111, while no voltage is present on the second terminal plate 112. Specifically, voltage is present on the first terminal block 111a, while no voltage is present on the second terminal block 112a. The voltage present on the first terminal plate 111 represents the voltage of the first battery pack. At this point, the control module 12 detects, through the first identification module 121, that voltage is present on the first terminal block 111a, and detects, through the second identification module 122, that no voltage is present on the second terminal block 112a. The control module 12 then controls the first switch control module 125 to close the first switch 123 and controls the second switch control module 126 to open the second switch 124. As a result, the connection circuit between the first terminal module 111a and the AC-DC conversion module 127 is conductive, and the connection circuit between the second terminal module 112a and the AC-DC conversion module 127 is non-conductive, so that the first terminal module 111a (i.e., the first terminal electrode 111) can output voltage, thereby enabling the charging device 100 to charge the first battery pack (i.e., the same-port battery pack).

[0052] When the charging device 100 is connected to the second battery pack, voltage is present on both the first terminal plate 111 and the second terminal plate 112, that is, voltage is present on both the first terminal block 111a and the second terminal block 112a. The voltage present on the first terminal plate 111 is the voltage of the second battery pack, and the voltage present on the second terminal plate 112 is the same as the voltage present on the first terminal plate 111, or the voltage present on the second terminal plate 112 is slightly lower than the voltage present on the first terminal plate 111. The voltage present on the second terminal plate 112 is slightly lower than the voltage present on the first terminal plate 111 by 0-2V. At this point, the control module 12 recognizes that voltage is present on the first terminal block 111a through the first identification module 121, and recognizes that voltage is present on the second terminal block 112a through the second identification module 122. The control module 12 then controls the first switch control module 125 to open the first switch 123 and controls the second switch control module 126 to close the second switch 124. As a result, the connection circuit between the first terminal module 111a and the AC-DC conversion module 127 is not conductive, and the connection circuit between the second terminal module 112a and the AC-DC conversion module 127 is conductive, so that the second terminal module 112a (i.e., the second terminal electrode 112) can output voltage, thereby enabling the charging device 100 to charge the second battery pack (i.e., the hetero-port battery pack).

[0053] When there is no voltage on both the first terminal plate 111 and the second terminal plate 112, the control module 12 detects through the first identification module 121 that there is no voltage on the first terminal plate 111a, and detects through the second identification module 122 that there is no voltage on the second terminal plate 112a. The control module 12 then controls the first switch control module 125 to open the first switch 123 and controls the second switch control module 126 to open the second switch 124. As a result, the connection circuits between the first and second terminal plates 111a, 112a and the AC-DC converter module 127 are both disconnected, causing neither the first and second terminal plates 111a, 112a to output voltage. Specifically, the absence of voltage on both the first and second terminal plates 111, 112 indicates that the charging device 100 is not connected to the battery pack. Optionally, if a battery pack is connected to the charging device 100 and there is no voltage on the first terminal electrode 111 and the second terminal electrode 112, it means that there is an abnormality inside the battery pack or the charging device 100, or there is an abnormality at the connection between the battery pack and the charging device 100.

[0054] As shown in Figures 2 and 4 , the charging device 100 further includes a third terminal piece 113, a fourth terminal piece 114, and a height adjustment assembly 115. The third terminal piece 113 is disposed on the height adjustment assembly 115, which is disposed on the housing assembly 10. The fourth terminal piece 114 is disposed on the housing assembly 10. The height of the third terminal piece 113 is the same as that of the first terminal piece 111, and the height of the fourth terminal piece 114 is also the same as that of the first terminal piece 111. Furthermore, as shown in Figures 2 and 4 , the second terminal piece 112 is also disposed on the height adjustment assembly 115. As shown in Figure 3 , the charging control circuit 1000 further includes a third terminal module 113a and a fourth terminal module 114a. The third terminal module 113a corresponds to the third terminal piece 113, and the fourth terminal module 114a corresponds to the fourth terminal piece 114.

[0055] In some embodiments, the third terminal electrode 113 is a communication electrode, and the fourth terminal electrode 114 is a negative charging electrode. The third terminal electrode 113 is electrically and communicatively connected to the battery pack to send and receive information or signals to the battery pack.

[0056] As shown in FIG5 , in some embodiments, the height adjustment assembly 115 includes a first height adjustment structure 1151 and a second height adjustment structure 1152. In the vertical direction, the first height adjustment structure 1151 is higher than the second height adjustment structure 1152. The first height adjustment structure 1151 and the second height adjustment structure 1152 can be integrally formed or separately provided, which is not limited in this application. When the first height adjustment structure 1151 and the second height adjustment structure 1152 are separately provided, the first height adjustment structure 1151 and the second height adjustment structure 1152 are connected. That is, when the first height adjustment structure 1151 and the second height adjustment structure 1152 are integrally formed or separately provided, when the height of the first height adjustment structure 1151 changes, the height of the second height adjustment structure 1152 changes accordingly; or when the height of the second height adjustment structure 1152 changes, the height of the first height adjustment structure 1151 changes accordingly.

[0057] As shown in FIG5 , the third terminal electrode 113 is disposed on the height adjustment assembly 115 , specifically, the third terminal electrode 113 is disposed on the housing assembly 10 and is surrounded by the first height adjustment structure 1151 . The second terminal electrode 112 is disposed on the second height adjustment structure 1152 . In the vertical direction, the sum of the heights of the second terminal electrode 112 and the second height adjustment structure 1152 is lower than the height of the first terminal electrode 111 , that is, the sum of the heights of the second terminal electrode 112 and the second height adjustment structure 1152 is lower than the heights of the other three terminal electrodes (the first terminal electrode 111 , the third terminal electrode 113 , and the fourth terminal electrode 114 ). As shown in FIG4 , the second terminal electrode 112 is an L-shaped electrode, and the second terminal electrode 112 faces backward, specifically, the second terminal electrode 112 is an L-shaped electrode in the front-to-back direction. The second terminal electrode 112 is L-shaped, consisting of a side wall terminal electrode 1121 and a top wall terminal electrode 1122 . The side wall terminal electrode 1121 is perpendicular to the plane extending in the front-to-back direction of the charging device 100 , and the top wall terminal electrode 1122 is parallel to the plane extending in the front-to-back direction of the charging device 100 .

[0058] As shown in FIG6 , the charging device 100 further includes a recess 13 disposed on the housing assembly 10. The recess 13 matches the second terminal tab 112, with at least a portion of the top terminal tab 1122 of the second terminal tab 112 aligned with the recess 13. In the left-right direction, the width of the recess 13 is greater than the width of the top terminal tab 1122 of the second terminal tab 112. In the front-to-back direction, the length of the recess 13 is greater than the portion of the top terminal tab 1122 of the second terminal tab 112 aligned with the recess 13, thereby accommodating the portion of the top terminal tab 1122 aligned with the recess 13.

[0059] When the charging device 100 is connected to the first battery pack, the first terminal tab 111 contacts the first battery pack, specifically the positive charging or discharging terminal of the first battery pack. The third terminal tab 113 contacts the first battery pack, specifically the communication terminal of the first battery pack. The fourth terminal tab 114 also contacts the first battery pack, specifically the negative charging or discharging terminal of the first battery pack. Due to the arrangement of the terminals of the first battery pack, when the charging device 100 is connected to the first battery pack, the first height adjustment structure 1151 surrounding the third terminal tab 113 is depressed, thereby driving the entire height adjustment assembly 115 downward. This also depresses the second height adjustment structure 1152, causing the second terminal tab 112 located above the second height adjustment structure 1152 to be pressed down into the groove 13, thus removing the second terminal tab 112 from contact with the first battery pack. When the charging device 100 is connected to the first battery pack, voltage only exists on the first terminal plate 111, and no voltage exists on the second terminal plate 112. The specific configuration of the port of the first battery pack is related art and will not be described in detail in this application.

[0060] When the charging device 100 is connected to the second battery pack, the first terminal tab 111 contacts the second battery pack, specifically the positive discharge port of the second battery pack. The third terminal tab 113 contacts the second battery pack, specifically the communication port of the second battery pack. The fourth terminal tab 114 also contacts the second battery pack, specifically the negative charge or discharge port of the second battery pack. Due to the arrangement of the second battery pack's ports, when the charging device 100 is connected to the second battery pack, the first height adjustment structure 1151 surrounding the third terminal tab 113 is not depressed, and the height of the entire height adjustment assembly 115 remains unchanged. Consequently, the heights of the second height adjustment structure 1152 and the second terminal tab 112 located above the second height adjustment structure 1152 also remain unchanged, thereby maintaining contact between the second terminal tab 112 and the second battery pack, specifically the positive charge port of the second battery pack. When the charging device 100 is connected to the second battery pack, voltage is present on both the first terminal plate 111 and the second terminal plate 112. The specific configuration of the ports of the second battery pack is related art and will not be further described in this application. In some embodiments, the current flowing through the charging positive port of the second battery pack is less than the current flowing through the discharging positive port, thereby ensuring both the safety of the second battery pack during charging and the discharge efficiency of the second battery pack.

[0061] This application proposes a charging device 100 suitable for power tools. Based on the port characteristics of a first battery pack (same-port battery pack) and a second battery pack (different-port battery pack), the second terminal plate 112 and the third terminal plate 113 of the charging device 100 are both arranged on a height adjustment assembly 115. This ensures that when the charging device 100 is in contact with a same-port battery pack, the second terminal plate 112 cannot contact the port of the same-port battery pack; when the charging device 100 is in contact with a different-port battery pack, the second terminal plate 112 can contact the port of the different-port battery pack. A control module 12 is also provided within the charging device 100. The control module 12 detects the voltage on the first terminal plate 111 and the second terminal plate 112 to control the output voltage of the first terminal plate 111 or the second terminal plate 112, thereby charging the same-port battery pack or the different-port battery pack. The charging device 100 is suitable for charging both same-port battery packs and different-port battery packs, and has a wide range of applications.

[0062] In some embodiments, a charging system for a power tool includes at least a charging device 100 and a battery pack, wherein the battery pack includes a first battery pack and / or a second battery pack. The charging device 100 is used to power the battery pack. When the first battery pack or the second battery pack is low on power, it can be connected to the charging device 100 for charging. The charging device 100 includes a housing assembly 10, a plurality of terminal tabs 11, and a control module 12. The plurality of terminal tabs 11 are disposed on the housing assembly 10, and the plurality of terminal tabs 11 include a first terminal tab 111 and a second terminal tab 112. The control module 12 is connected to both the first terminal tab 111 and the second terminal tab 112. When the charging device 100 is connected to the first battery pack, the control module 12 detects that there is voltage on the first terminal tab 111 and no voltage on the second terminal tab 112, and then controls the first terminal tab 111 to output voltage. When the charging device 100 is connected to the second battery pack, the control module 12 detects that voltage is present on both the first terminal plate 111 and the second terminal plate 112, and the control module 12 controls the second terminal plate 112 to output voltage. The specific operation of the charging device 100 and the battery pack in the charging system is the same as described above in this application and will not be repeated here.

[0063] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A charging device suitable for an electric tool, comprising: Shell assembly; A plurality of terminal pole pieces, arranged on the housing assembly, for contacting with the port of the battery pack; wherein the plurality of terminal pole pieces include a first terminal pole piece and a second terminal pole piece; A control module, configured to be connected to the first terminal electrode and the second terminal electrode; The control module is configured as follows: When it is detected that there is a voltage on the first terminal electrode piece and there is no voltage on the second terminal electrode piece, controlling the first terminal electrode piece to output a voltage; When it is detected that voltage exists on both the first terminal electrode and the second terminal electrode, the second terminal electrode is controlled to output voltage.

2. The charging device according to claim 1, wherein: The battery pack includes a first battery pack. When the charging device is connected to the first battery pack, there is a voltage on the first terminal electrode, and there is no voltage on the second terminal electrode.

3. The charging device according to claim 1, wherein: The battery pack includes a second battery pack. When the charging device is connected to the second battery pack, voltage exists on both the first terminal electrode and the second terminal electrode.

4. The charging device according to claim 1, wherein: When the control module detects that there is no voltage on the first terminal electrode and the second terminal electrode, the control module controls the first terminal electrode and the second terminal electrode to not output voltage.

5. The charging device according to claim 1, wherein: The charging device further includes a height adjustment component, which is disposed on the housing component and includes a first height adjustment structure and a second height adjustment structure.

6. The charging device according to claim 5, wherein: The first height adjustment structure and the second height adjustment structure are connected.

7. The charging device according to claim 6, wherein: The plurality of terminal pole pieces include a third terminal pole piece, the third terminal pole piece is disposed on the housing assembly and is surrounded by the first height adjustment structure, and the height of the third terminal pole piece is the same as that of the first terminal pole piece.

8. The charging device according to claim 7, wherein: The second terminal electrode is disposed on the second height adjustment structure, and a height of the first terminal electrode is higher than a sum of heights of the second terminal electrode and the second height adjustment structure.

9. The charging device according to claim 8, wherein: The housing assembly is provided with a groove, and the groove matches the second terminal electrode.

10. The charging device according to claim 9, wherein: When the charging device is connected to the first battery pack, the first terminal pole piece is in contact with the first battery pack, the first height adjustment structure is pressed downward, driving the height adjustment assembly to be pressed downward, and the second terminal pole piece is pressed into the groove, so that the second terminal pole piece is not in contact with the first battery pack.

11. The charging device according to claim 9, wherein: When the charging device is connected to the second battery pack, the first terminal electrode is in contact with the second battery pack, and the height of the height adjustment component remains unchanged, so that the second terminal electrode is in contact with the second battery pack.

12. The charging device according to claim 1, wherein: The plurality of terminal poles further include a fourth terminal pole, and a height of the fourth terminal pole is the same as a height of the first terminal pole.

13. The charging device according to claim 1, wherein: The second terminal electrode is an L-shaped electrode.

14. The charging device according to claim 13, wherein: The second terminal electrode piece includes a side wall terminal electrode piece and a top wall terminal electrode piece, and at least a portion of the top wall terminal electrode piece is opposite to the groove on the housing assembly.

15. The charging device according to claim 1, wherein: The battery pack includes a first battery pack and a second battery pack, wherein the first battery pack is a same-port battery pack and the second battery pack is a different-port battery pack.

16. A charging device suitable for an electric tool, comprising: Shell assembly; A plurality of terminal pole pieces are arranged on the housing assembly; wherein the plurality of terminal pole pieces include a first terminal pole piece and a second terminal pole piece; The first terminal electrode is used to be connected to the discharge positive electrode port of the battery pack, and the second terminal electrode is used to be connected to the charging positive electrode port of the battery pack; the current flowing through the charging positive electrode port is smaller than the current flowing through the discharge positive electrode port.

17. The charging device according to claim 16, wherein: The battery pack is a heterotype battery pack.

18. A charging system for an electric tool, comprising: A battery pack and a charging device for charging the battery pack, wherein the battery pack includes a first battery pack and / or a second battery pack; wherein the charging device includes: Shell assembly; A plurality of terminal pole pieces are arranged on the housing assembly; wherein the plurality of terminal pole pieces include a first terminal pole piece and a second terminal pole piece; A control module, configured to be connected to the first terminal electrode and the second terminal electrode; When the charging device is connected to the first battery pack, the control module detects that there is voltage on the first terminal electrode and there is no voltage on the second terminal electrode, and the control module controls the first terminal electrode to output voltage; When the charging device is connected to the second battery pack, the control module detects that voltage exists on both the first terminal electrode and the second terminal electrode, and the control module controls the second terminal electrode to output voltage.

19. The charging system of claim 18, wherein: The charging device also includes a height adjustment component, which is arranged on the housing component and includes a first height adjustment structure and a second height adjustment structure; the second terminal electrode is arranged on the second height adjustment structure.

20. The charging system of claim 19, wherein: The shell assembly is provided with a groove matching the second terminal pole piece; when the charging device is connected to the first battery pack, the first terminal pole piece contacts the first battery pack, and the second height adjustment structure is pressed into the groove, so that the second terminal pole piece does not contact the first battery pack.

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