Backpack power supply assembly

Abstract

The invention relates to a backpack type power supply assembly which is used for providing electric energy for an electric tool and comprises a shell, a backpack device which is used for being worn by an operator and is connected with the shell, and a plurality of battery packs which are detachably connected with the shell through plugging and unplugging actions, the plurality of battery packs comprise at least one first battery pack, a second battery pack and a third battery pack, and the first battery pack is at least partially overlapped with the second battery pack in the plugging direction and is at least partially overlapped with the third battery pack in the direction perpendicular to the plugging direction. According to the backpack type power supply assembly, through the arrangement, the multiple battery packs in the backpack type power supply assembly are compactly arranged, the size is small, and the backpack type power supply assembly is suitable for being carried by an operator.

Description

[0001] This application is an invention filed by the applicant on March 17, 2021, and its name is “Backpack Power Pack

[0002] "Divisional application of the Chinese invention patent application with application number 202110285727.9". Technical Field

[0003] The invention relates to a backpack power supply assembly. Background Art

[0004] The backpack power supply assembly is used to be carried by the user and provide power to the power tool. The power tool may be a handheld hair dryer, a high-pressure cleaner, etc. The backpack power supply assembly is used to supply power to the power tool to meet the use requirements of the power tool for a long time. Usually, a plurality of battery packs are installed on the shell of the backpack power supply assembly. The battery pack and the shell are connected by electrical connectors to achieve electrical connection. The battery pack can be disassembled relative to the shell to charge or replace the battery pack. At present, the arrangement of the battery pack adopts a single-row structure, that is, when the user carries it on his back, a plurality of battery packs are arranged in a row in the battery pack. However, this method has the following problems: because the battery packs are arranged in a row, the vertical dimension of the shell of the backpack power supply assembly is too long, the overall dimension is not coordinated, and the center of gravity is biased upward, which is not conducive to carrying and standing. Summary of the invention

[0005] The object of the present invention is to provide a backpack-type power supply assembly suitable for an operator to carry.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a backpack power supply assembly for providing electrical energy to an electric tool, the backpack power supply assembly comprising a shell, a backpack device for an operator to wear and connected to the shell, and a plurality of battery packs that are removably connected to the shell through plugging and unplugging, the plurality of battery packs comprising at least a first battery pack, a second battery pack and a third battery pack, the first battery pack being at least partially overlapped with the second battery pack in a plugging and unplugging direction, and being at least partially overlapped with the third battery pack in a direction perpendicular to the plugging and unplugging direction.

[0007] Compared with the prior art, the vertical dimension of the shell of the backpack power supply assembly is reduced by at least half, thereby making the overall proportion of the backpack power supply assembly more coordinated, which is convenient for carrying and standing. Most importantly, through this arrangement, multiple packs are arranged compactly and in small size, which is suitable for operators to carry.

[0008] Furthermore, at least two battery packs among the plurality of battery packs have the same plugging and unplugging direction.

[0009] Furthermore, at least two battery packs among the plurality of battery packs have the same insertion direction.

[0010] Furthermore, at least two battery packs among the plurality of battery packs are inserted in opposite directions.

[0011] Furthermore, on a plane perpendicular to the plugging and unplugging direction, a ratio of an overlapping area of ​​the projections of the first battery pack and the second battery pack to a projection area of ​​the first battery pack or the second battery pack is greater than or equal to 50%.

[0012] Furthermore, on a plane parallel to the plugging and unplugging direction, a ratio of an overlapping area of ​​the projections of the first battery pack and the third battery pack to a projection area of ​​the first battery pack or the third battery pack is greater than or equal to 50%.

[0013] Furthermore, the plugging and unplugging direction is perpendicular to the longitudinal extension direction of the shell.

[0014] Furthermore, the plugging and unplugging direction is parallel to the longitudinal extension direction of the shell.

[0015] Furthermore, the backpack power supply assembly also includes a flip cover arranged on the shell, the shell and the flip cover form a battery cavity for accommodating a plurality of battery packs, and the flip cover moves relative to the shell to open or close the battery cavity.

[0016] Furthermore, one side of the flip cover is pivotally connected to the shell, and the flip cover rotates relative to the shell to open or close the battery cavity.

[0017] Furthermore, the flip cover at least includes a first flip cover and a second flip cover, and the first flip cover and the second flip cover have the same rotation axis.

[0018] Furthermore, the shell and the first flip cover form a first battery cavity for accommodating a plurality of battery packs, and the shell and the second flip cover form a second battery cavity for accommodating a plurality of battery packs, and the insertion directions of the battery packs accommodated in the first battery cavity and the second battery cavity are opposite.

[0019] Furthermore, the rotation axis of the flip cover is perpendicular to the longitudinal extension axis of the shell.

[0020] Furthermore, the rotation angle of the flip cover relative to the housing is between 35-90 degrees.

[0021] The present invention also provides a shell, including a plurality of battery pack interfaces, and the battery pack can be removably connected to the battery pack interfaces through plugging and unplugging actions, characterized in that the plurality of battery pack interfaces include at least one first battery pack interface, a second battery pack interface and a third battery pack interface, and the first battery pack interface is at least partially overlapped with the second battery pack interface in the plugging and unplugging direction, and is at least partially overlapped with the third battery pack interface in a direction perpendicular to the plugging and unplugging direction.

[0022] By configuring the multiple battery pack interfaces on the shell as described above, the multiple battery pack interfaces are arranged compactly and the shell is small in size, which is convenient for storage and carrying.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a backpack power supply assembly according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The schematic diagram of the structure of the backpack power supply assembly when the cover is opened;

[0026] Figure 3 for Figure 1 A schematic structural diagram of a housing of a backpack power supply assembly is shown;

[0027] Figure 4 for Figure 1 The schematic diagram of the backpack power supply assembly shown is in the state where the cover is not shown;

[0028] Figure 5 for Figure 4 The schematic diagram of the backpack power supply assembly shown is in a state where two battery packs are removed;

[0029] Figure 6 for Figure 1 The schematic diagram of the structure of the backpack power supply assembly when the cover is not opened;

[0030] Figure 7 for Figure 1 Middle AA section view;

[0031] Figure 8 A schematic diagram of the structure of a backpack power supply assembly shown in another embodiment of the present invention;

[0032] Fig. 9 for Figure 8 A schematic diagram of a backpack power supply assembly is shown;

[0033] Fig.10 for Figure 8 A schematic diagram of a backpack power supply assembly in another direction is shown.

[0034] Figures 11 to 17 Schematic diagram of the battery pack arrangement of a backpack power supply assembly in different embodiments. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] See also Figures 1 to 3 The backpack power supply assembly 100 shown in an embodiment of the present invention includes a housing 10, a backpack device (not shown) for the operator to wear and connected to the housing 10, and a plurality of battery packs that are removably connected to the housing 10 by plugging and unplugging. The backpack power supply assembly 100 can supply power to the power tool by connecting a pluggable plug between the backpack power supply assembly 100 and the power tool, or by providing a pluggable electrical connection structure between the backpack power supply assembly 100 or the backpack device and the power tool. In practice, the backpack device can be a backpack belt for wearing or bundling, or the backpack device can be a wearable assembly with a backpack belt, which can be mechanically connected to the power tool.

[0040] Typically, during operation, the housing 10 is vertically arranged, with its longitudinal extension direction being the vertical direction, and is fixed to the back of the operator through a carrying device. The working state of the backpack power supply assembly 100 is taken as a reference direction, wherein the direction in which the back and the front of the operator standing when carrying the backpack power supply assembly 100 are facing is the front-to-back direction ( Figure 2 The direction indicated by the arrow c in the figure, where the direction facing the front of the standing person is the back), and the height direction after the operator stands is the up and down direction (such as Figure 1 , Figure 3 The height direction is the vertical direction, that is, the longitudinal direction, and the width direction after a person stands is the left-right direction (such as Figure 1 , Figure 3 (the direction indicated by arrow a1-a2).

[0041] Please combine Figure 2 , Figure 3 and Figure 5 The housing 10 includes a back plate 11, which is partially hollow so as to accommodate the circuit board. The back plate 11 includes a back surface 111 that is against the back of the operator or close to the operator and perpendicular to the ground, and a docking surface 112 that is arranged opposite to the back surface 111. The back surface 111 is usually a plane or a plane-like shape. Figure 3 The docking surface 112 is provided with a plurality of battery pack interfaces for realizing one-to-one mechanical and electrical connection with each battery pack. The battery pack interface may be a structure commonly used in the prior art, such as a male plug with a metal terminal and a slide rail for facilitating the insertion of the battery pack.

[0042] The structure of the battery pack adopts the existing technology and will not be described in detail here. In this embodiment, the plurality of battery packs include at least one first battery pack 201, a second battery pack 202 and a third battery pack 203, and the first battery pack 201 is at least partially overlapped with the second battery pack 202 in the plug-in direction, and at least partially overlapped with the third battery pack 203 in the direction perpendicular to the plug-in direction.

[0043] Accordingly, if Figure 3As shown, several battery pack interfaces include at least one first battery pack interface 101, a second battery pack interface 102 and a third battery pack interface 103. The first battery pack interface 101 is used to match the first battery pack 201, the second battery pack interface 102 is used to match the second battery pack 202, and the third battery pack interface 103 is used to match the third battery pack 203. The first battery pack interface 101 is at least partially overlapped with the second battery pack interface 102 in the plug-in direction, and at least partially overlapped with the third battery pack interface 103 in the direction perpendicular to the plug-in direction. The plug-in direction includes an insertion direction and a removal direction. The insertion direction refers to the direction in which the battery pack is inserted relative to the battery pack interface to achieve mechanical and electrical connection between the battery pack and the battery pack interface. The removal direction refers to the direction in which the battery pack is removed relative to the battery pack interface to disconnect the battery pack from the battery pack interface mechanically and electrically. This makes the overall proportion of the housing 10 more coordinated, which is convenient for carrying and standing.

[0044] Furthermore, on a plane perpendicular to the plugging and unplugging direction, the ratio of the overlapping area of ​​the projections of the first battery pack 201 and the second battery pack 202 to the projection area of ​​the first battery pack 201 or the second battery pack 202 is greater than or equal to 50%, and on a plane parallel to the plugging and unplugging direction, the ratio of the overlapping area of ​​the projections of the first battery pack 201 and the third battery pack 203 to the projection area of ​​the first battery pack 201 or the third battery pack 203 is greater than or equal to 50%. In this way, the first battery pack 201, the second battery pack 202 and the third battery pack 203 will be arranged more compactly and in a more coordinated proportion, making it more comfortable for the operator to carry.

[0045] Furthermore, at least two of the plurality of battery packs have the same plugging and unplugging directions. In this embodiment, the first battery pack 201, the second battery pack 202, and the third battery pack 203 have the same plugging and unplugging directions. By making at least two battery packs have the same plugging and unplugging directions, the problem of inconvenience in plugging and unplugging caused by inconsistent plugging and unplugging directions in the prior art is solved, thereby facilitating the operator to insert or remove the battery pack.

[0046] In other embodiments, several battery packs may also be configured to have different plug-in and unplug-in directions, such as dividing several battery packs into two groups, where the plug-in and unplug-in directions of one battery pack in the two groups are different from those of the other battery pack, such as being arranged perpendicular to each other or at an angle to each other. In other embodiments, when three or more groups are configured, the plug-in and unplug-in directions of some battery pack groups may be the same, or the plug-in and unplug-in directions of all battery pack groups may be the same, or the plug-in and unplug-in directions of all battery pack groups may be different. This will not be elaborated here.

[0047] In order to facilitate plugging and unplugging, at least two of the plurality of battery packs have the same insertion direction. Optionally, the battery packs arranged on the same side of the housing 10 have the same insertion direction. Figure 4As shown, the insertion direction of the first battery pack 201 is the same as the insertion direction of the third battery pack 203 . Of course, the removal direction of the first battery pack 201 is also the same as the removal direction of the third battery pack 203 .

[0048] Optionally, at least two of the plurality of battery packs are inserted in opposite directions. Optionally, the battery packs disposed on opposite sides of the housing 10 are inserted in opposite directions. Figure 4 , the insertion direction of the first battery pack 201 is opposite to the insertion direction of the second battery pack 202, and of course, the removal direction of the first battery pack 201 is also opposite to the removal direction of the second battery pack 202. Further, in this embodiment, the insertion and removal direction ( Figure 4 The direction of the arrow a1-a2 in the middle) and the longitudinal extension direction of the housing 10 ( Figure 4 The vertical dimension of the housing 10 is further reduced by making the battery pack compact and small in size, which is suitable for the operator to carry. In this way, the battery pack can be plugged in and out along a direction perpendicular to the longitudinal axis of the housing 10, which can effectively reduce the longitudinal dimension of the housing 10 and facilitate the operator to carry it. Of course, in other embodiments, the plugging and unplugging direction can also be parallel to the longitudinal extension direction of the housing 10, such as Fig. 9 and Fig.10 As shown, or alternatively, the battery pack and the longitudinal extension axis of the housing 10 are arranged at an acute angle or an obtuse angle, so as to reduce the width dimension of the housing 10.

[0049] In this embodiment, the number of battery packs is 4, and the 4 battery packs are respectively the first battery pack 201, the second battery pack 202, the third battery pack 203 and the fourth battery pack 204. The first battery pack 201 and the second battery pack 202, the third battery pack 203 and the fourth battery pack 204 are arranged opposite to each other along the left and right directions of the shell, and the first battery pack 201 and the third battery pack 203, the second battery pack 202 and the fourth battery pack 204 are arranged at intervals along the up and down directions of the shell. The first battery pack 201 and the third battery pack 203 have the same insertion direction and extraction direction, and are inserted from the outside of the shell to the inside of the shell and in a direction perpendicular to the longitudinal axis of the shell 10, that is, inserted in the direction of arrow a2, and are extracted from the inside of the shell to the outside of the shell and in a direction perpendicular to the longitudinal axis of the shell 10, that is, extracted in the direction of arrow a1. Similarly, the insertion direction and removal direction of the second battery pack 202 and the fourth battery pack 204 are the same, both are inserted from the outside of the shell to the inside of the shell and in a direction perpendicular to the longitudinal axis of the shell 10, that is, inserted along the direction of arrow a1, and both are removed from the inside of the shell to the outside of the shell and in a direction perpendicular to the longitudinal axis of the shell 10, that is, removed along the direction of arrow a2. Therefore, the insertion direction of the first battery pack 201 and the third battery pack 203 is opposite to the insertion direction of the second battery pack 202 and the fourth battery pack 204, and the removal direction of the first battery pack 201 and the third battery pack 203 is opposite to the removal direction of the second battery pack 202 and the fourth battery pack 204. This arrangement can prevent the insertion and removal of multiple battery packs from interfering with each other, and the operator can complete the insertion and removal of multiple battery packs at the same time, which is more convenient and quick.

[0050] In this embodiment, a number of battery packs are arranged into two groups, and the battery packs in each group are arranged in a row, so that the vertical dimension of the shell 10 is small, and the overall proportion of the backpack power supply assembly 100 is more coordinated, which is convenient for carrying and standing. Among them, the plug-in and unplugging directions of all battery packs in the same group are the same. By making the plug-in and unplugging directions of the battery packs in the same group the same, the problem of inconvenience in plug-in and unplugging caused by inconsistent plug-in and unplugging directions in the prior art is solved, so that it is convenient for the operator to insert or remove the battery pack. In order to facilitate plug-in and unplugging, a number of battery packs are arranged into a first battery pack group and a second battery pack group that are arranged back to back, and the insertion direction of the battery packs in the first battery pack group is opposite to the insertion direction of the battery packs in the second battery pack group. In this embodiment, the first battery pack group includes a first battery pack 201 and a second battery pack 202, and the second battery pack group includes a third battery pack 203 and a fourth battery pack 204. It should be noted that, in the present embodiment, the battery packs in the two groups are arranged in two parallel rows. In other embodiments, when the number of battery pack groups exceeds two rows, some of the battery pack groups may be cross-arranged, that is, the battery packs in two rows are arranged in a large row, and the plugging and unplugging direction of one battery pack in the two groups in the large row is opposite to the plugging and unplugging direction of the other battery pack, or the plugging and unplugging directions of the two battery packs also form an angle accordingly. Such an arrangement can reduce the size of the shell 10 in the lateral direction.

[0051] See also Figure 1 and Figure 2 The backpack power supply assembly 100 further includes a flip cover 40 disposed on the housing 10. The housing 10 and the flip cover 40 enclose a battery cavity 30 for accommodating a plurality of battery packs. A plurality of battery pack interfaces are located in the battery cavity 30. The flip cover 40 moves relative to the housing 10 to open or close the battery cavity 30, so as to enable the battery pack to be plugged in and out. Figure 1 As shown, the flip cover 40 is configured to pivot relative to the housing 10, and the rotation angle of the flip cover 40 relative to the housing 10 is between 35-90 degrees. If the rotation angle is too large, the flip cover will take up too much space when opened, and if the rotation angle is too small, the flip cover cannot be opened to insert and remove the battery pack. Of course, in other embodiments, the flip cover 40 can also be configured to translate relative to the housing 10 or other forms. The flip cover 40 can be dustproof and waterproof, which helps to protect the battery pack 20 and makes the appearance more beautiful.

[0052] An opening 50 is provided on one side of the housing 10, and the flip cover 40 covers the opening 50. The battery pack is inserted into or removed from the battery cavity 30 through the opening 50. One side of the flip cover 40 is pivotally connected to the housing 10, and the other side is adsorbed and connected to the housing 10 through a magnetic attraction structure (not shown). Figure 7, the magnetic structure includes a first magnetic component 61 embedded in the flip cover 40 and a second magnetic component 62 embedded in the shell 10, and the magnetic poles of the opposite surfaces of the first magnetic component 61 and the second magnetic component 62 are opposite. The first magnetic component 61 is arranged in the middle of the outer side of the flip cover 40. In other embodiments, the first magnetic component 61 or the second magnetic component 62 can also be set to a ferromagnetic material. In order to achieve better sealing, the flip cover 40 and the shell 10 have sealing components 71 and 72, and the first magnetic component 61 and the second magnetic component 62 are embedded in the sealing components 71 and 72. In addition, in other embodiments, the magnetic attraction structure may not be adopted, such as other common connection methods such as snap connection, which will not be repeated here.

[0053] The flip cover 40 at least includes a first flip cover 401 and a second flip cover 402. Figure 1 , Figure 2 Specifically, the opening 50 includes a first plug-in port 501 and a second plug-in port 502, the first flip cover 401 covers the first plug-in port 501, and the second flip cover 402 covers the second plug-in port 502, wherein the first battery pack 201 and the third battery pack 203 are inserted or removed from the first plug-in port 501, and the second battery pack 202 and the fourth battery pack 204 are inserted or removed from the second plug-in port 502. The first flip cover 401 and the second flip cover 402 have the same shape and size, so that the first flip cover 401 and the second flip cover 402 can be installed interchangeably, that is, the first flip cover 401 can be installed at the position where the second flip cover 402 is installed, and the second flip cover 402 can also be installed at the position where the first flip cover 401 is installed, saving installation time.

[0054] For ease of operation, the pivoting motions of all flip covers 40 do not interfere with each other, and the rotation axis of the first flip cover and the second flip cover are the same. Figure 5 and Figure 6The housing 10 is provided with a bracket 14, and the first flip cover 401 and the second flip cover 402 are both pivotally connected to the bracket 14. A first lug 4010 and a second lug 4011 extend from one side of the first flip cover 401, and a third lug 4020 and a fourth lug 4021 extend from one side of the second flip cover 402. The first lug 4010, the second lug 4011, the third lug 4020 and the fourth lug 4021 are relatively rotatably mounted on the bracket 14. The bracket 14 includes a first sleeve portion 140, a second sleeve portion 141, a first limiting portion 142 and a second limiting portion 143 located at both ends of the first sleeve portion 140, and a third limiting portion 144 and a fourth limiting portion 145 located at both ends of the second sleeve portion 141. The first lug 4010 and the third lug 4020 are sleeved on the first sleeve portion 140, and the first limiting portion 142 and the second limiting portion 143 limit the axial movement of the first lug 4010 and the third lug on the first sleeve portion 140; the second lug 4011 and the fourth lug 4021 are sleeved on the second sleeve portion 141, and the third limiting portion 144 and the fourth limiting portion 145 limit the axial movement of the second lug 4011 and the fourth lug 4021 on the second sleeve portion 141. The first flip cover 401 and the second flip cover 402 both rotate around the central axis X of the bracket 14. In this way, the first flip cover 401 and the second flip cover 402 can share the bracket 14 and the same rotation axis, thereby achieving compact installation, so that the backpack power supply assembly 100 occupies a small volume.

[0055] The battery cavity 30 includes a first battery cavity 301 and a second battery cavity 302 located on both sides of the bracket 14. The first flip cover 401 is closed relative to the shell 10 to close the first battery cavity 301, and the second flip cover 402 is closed relative to the shell 10 to close the second battery cavity 302. The battery pack disposed in the first battery cavity 301 is inserted or removed from the first plug-in port 501, and the battery pack disposed in the second battery cavity 302 is inserted or removed from the second plug-in port 502. The opening directions of the first plug-in port 501 and the second plug-in port 502 are opposite. Among them, the insertion directions of the battery packs stored in the first battery cavity 301 and the second battery cavity 302 are opposite. It should be noted that, in the present embodiment, only two battery packs are arranged in one battery cavity, while in other embodiments, more battery packs may be arranged in one battery cavity. In this case, the method for removing the battery packs may be as follows: taking the first plug port 501 and the first battery cavity 301 as an example, the battery packs in a row close to the first plug port 501 are preferentially slid out from the first plug port 501, and then the battery packs in a row far from the first plug port 501 are taken out in sequence; when installing the battery packs in the first battery cavity 301, the battery packs in a row far from the first plug port 501 are preferentially slid into the battery cavity 30, and then the battery packs in a row close to the first plug port 501 are sequentially loaded.

[0056] In other embodiments, only one opening 50 may be provided, which may be provided on the left side or the right side, that is, only the first plug-in port 501 or the second plug-in port 502 is retained.

[0057] It should be noted that at least two columns of battery packs are also arranged to form at least two parallel rows. The distance between two adjacent battery packs in the upper row of at least two rows is equal to the distance between two adjacent battery packs in the next row adjacent thereto. With such an arrangement, the arrangement of the battery packs in the battery cavity 30 can be more regular, and the space in the battery cavity 30 can be fully utilized, so that the backpack power supply assembly 100 is smaller in size and more convenient for the operator to carry. The distance between the upper battery pack in each column and the back side 111 of the shell 10 is equal to the distance between the lower battery pack and the back side 111 of the shell 10. With such an arrangement, the arrangement of the battery packs in the battery cavity 30 can be more regular, and the space in the battery cavity 30 can be fully utilized, so that the backpack power supply assembly 100 is smaller in size and more convenient for the operator to carry.

[0058] The following is a detailed example using four battery packs in this embodiment. Figure 2 and Figure 4 , the distance between the first battery pack 201 and the second battery pack 202 and the back side 111 of the flip cover 40 is D1, and the distance between the third battery pack 203 and the fourth battery pack 204 and the back side 111 of the flip cover 40 is D2, and D1=D2. The first battery pack 201 and the second battery pack 202 are arranged on the left and right, and the third battery pack 203 and the fourth battery pack 204 are arranged on the left and right. The distance between the first battery pack 201 and the second battery pack 203 is S1, and the distance between the third battery pack 203 and the fourth battery pack 204 is S2, and S1=S2. The first battery pack 201 and the second battery pack 202 are arranged along the central axis ( Figure 1 and Figure 3 The middle dotted line dd represents the central axis of the shell 10 ), and the third battery pack 203 and the fourth battery pack 204 are symmetrically arranged along the central axis of the shell 10 .

[0059] In this embodiment, the arrangement of the battery packs is as follows: 1. The distance between the upper battery pack in each column and the back 111 of the backpack device is equal to the distance between the lower battery pack and the back 111 of the backpack device; 2. The distance between the two battery packs in the upper row of two rows is equal to the distance between the two battery packs in the next row. In addition to this arrangement, the following arrangements can also be used:

[0060] The first variation: the distance between the upper battery pack in each column and the back 111 of the backpack is not equal to the distance between the lower battery pack and the back 111 of the backpack. Figure 2In the figure, the symbols D1 and D2 are shown, the distance between the first battery pack 201 and the third battery pack 203 and the back surface 111 of the flip cover 40 is D1, and the distance between the second battery pack 202 and the fourth battery pack 204 and the back surface 111 of the flip cover 40 is D2, D1<D2 or D1>D2. This arrangement can adapt to the arrangement of battery packs of different sizes in the battery cavity 30.

[0061] The second variation: The distance between two adjacent battery packs in the upper row is not equal to the distance between two adjacent battery packs in the next row. Figure 4 In the symbols of S1 and S2, the distance between the first battery pack 201 and the third battery pack 203 in the first row is S1, and the distance between the second battery pack 202 and the fourth battery pack 204 in the second row is S2, S1<S2 or S1>S2. However, whether in this embodiment or in the variation, the distance S between two adjacent battery packs in the same row can be adjusted according to actual needs.

[0062] See also Figures 8 to 10 The backpack power supply assembly 100' is a variation of the backpack power supply assembly 100 shown in the first embodiment, and the differences are: 1. It has only one battery cavity 30' and one flip cover 40', and all battery packs are arranged in one battery cavity 30'; 2. It has only one opening (unnumbered), and all battery packs have the same insertion direction and the same removal direction, and the insertion and removal directions of the battery packs are all along the longitudinal extension direction of the housing 10' ( Figure 7 3. The flip cover 40' is pivotally connected to the housing 10' on one side and snap-fitted on the other side; 4. The rotation axis of the flip cover 40' is perpendicular to the longitudinal extension axis of the housing.

[0063] The above differences are described in detail below. The two groups of battery packs are arranged to form two parallel rows. The distance between two adjacent battery packs in the upper row of the two rows is greater than the distance between two adjacent battery packs in the next row adjacent thereto. This arrangement is to reserve space for the shell 10' and the flip cover 40' to be locked. The distance between the upper battery pack in each column and the back side 111' of the shell 10' is less than the distance between the lower battery pack and the back side 111' of the shell 10'. This arrangement minimizes the distance between the uppermost battery pack and the back side 111' of the shell 10', thereby providing a plug-in and unplugging space for the lower row of battery packs, facilitating the plug-in and unplugging of the lower row of battery packs.

[0064] Specifically, the distance between the first battery pack 201' and the second battery pack 202' is S1, and the distance between the third battery pack 203' and the fourth battery pack 204' is S2, S1>S2. The distance between the first battery pack 201' and the second battery pack 202' and the back side 111' of the shell 10' is D1, and the distance between the third battery pack 203' and the fourth battery pack 204' and the back side 111' of the shell is D2, D1<D2. The first battery pack 201' and the second battery pack 202' are along the central axis of the shell 10' ( Fig.10 The middle dotted line dd represents the central axis of the housing 10', and the third battery pack 203' and the fourth battery pack 204' are symmetrically arranged along the central axis of the housing 10'. It should be noted that since D1 and D2 are different, the positions of the battery pack interfaces connected to different battery packs are also different, that is, the positions of the battery pack interfaces 101 and 102 corresponding to the first battery pack 201' and the second battery pack 202' are relatively rearward.

[0065] In the above-mentioned embodiment 1, the plugging and unplugging directions of the two battery packs are opposite, and the openings are located on the sides. In the embodiment 2, the plugging and unplugging directions of the two battery packs are the same, and the openings (unnumbered) are located on the upper side. The plugging and unplugging directions of all battery packs in the embodiment 2 are the same in the vertical direction ( Figure 8 However, regardless of the first or second embodiment, the operator can conveniently insert or remove the battery pack, and there is no need to reserve a plug-in and unplug space for adjacent battery packs in the battery cavity 30'. Therefore, the space in the battery cavity 30' can be fully utilized, so that the overall volume of the backpack power supply assembly 100' is reduced, which is convenient for the operator to carry.

[0066] In Embodiment 1 and Embodiment 2, the battery packs in each group are arranged in a row. As mentioned above, the battery packs in each group can also be arranged in a row. The plugging and unplugging directions of the battery packs in all groups are the same, or they can be different or partially different. When the plugging and unplugging directions are different, in order to meet the plugging and unplugging operability of the battery packs, the battery pack interfaces docked with the battery packs in two adjacent rows can be arranged in the up and down directions opposite to each other. In detail, the battery pack interfaces docked with the battery packs in two adjacent rows are mirror-imaged on both sides along the central axis between the two adjacent rows of battery packs, that is, the battery packs in the two adjacent rows are mirror-imaged and also arranged opposite to each other. In this design, the plugging and unplugging directions of the battery packs in the two adjacent rows that are arranged opposite to each other are opposite. Of course, in this arrangement, sufficient plugging and unplugging space must be left between the battery packs in the lower row of the battery packs in the two adjacent rows that are arranged opposite to each other and the shell or the battery packs in the lower row adjacent to it. For example, in two rows of battery packs, the battery packs in the upper row are plugged in and out in an upward direction, while the battery packs in the lower row are plugged in and out in a downward direction, wherein sufficient space must be left between the battery packs in the lower row and the shell for the battery packs in the lower row to be plugged in and out. For another example, in four rows of battery packs, for the convenience of description, they are named from top to bottom: the first row of battery packs, the second row of battery packs, the third row of battery packs and the fourth row of battery packs. Correspondingly, the docking part docking with the first row of battery packs is named the first row of docking parts, the docking part docking with the second row of battery packs is named the second row of docking parts, the docking part docking with the third row of battery packs is named the third row of docking parts, and the docking part docking with the fourth row of battery packs is named the fourth row of docking parts. In actual design, the four rows of docking parts can be combined in pairs to be arranged opposite to each other in the up and down direction, or two rows of docking parts are arranged opposite to each other in the up and down direction. For example: the first row of docking parts and the second row of docking parts are arranged opposite to each other in the up and down direction. At this time, the corresponding first row of battery packs and the second row of battery packs are arranged opposite to each other in the up and down direction, and the plugging and unplugging directions of the two are opposite. At this time, sufficient plugging and unplugging space needs to be set between the second row of battery packs and the third row of battery packs, that is, the spacing between the second row of battery packs and the third row of battery packs needs to be greater than or equal to the plugging and unplugging moving distance of the second row of battery packs. Of course, it should be noted that the above-mentioned plug-in space, whether it is the plug-in space between the battery pack and the shell or the plug-in space between the upper battery pack and the lower battery pack, is actually the distance between the corresponding upper battery pack interface and the shell or the lower battery pack interface, and this distance is the plug-in space.

[0067] The above-mentioned backpack power supply assembly arranges a number of battery packs into at least two groups, and the battery packs in each group are arranged in a column or a row, so that the vertical dimension of the shell is smaller. Compared with the prior art, the vertical dimension of the shell is reduced by at least half, thereby making the organizing proportions of the backpack power supply assembly more coordinated, which is conducive to carrying and standing. Most importantly, through this arrangement, multiple packs can be arranged compactly and in small size without changing the battery packs, and the overall size can be close to that of a backpack, which is suitable for the operator to carry.

[0068] See also Figures 11 to 17 , showing seven different battery pack layouts. The following explains them one by one.

[0069] like Fig.11 and Fig.12 As shown, the battery packs include a first battery pack 201', a second battery pack 202', a third battery pack 203' and a fourth battery pack 204', and the plugging directions of the four battery packs are the same as those in the first embodiment. Fig.11 As shown, the first battery pack 201' and the third battery pack 203' are arranged in a row, the second battery pack 202' and the fourth battery pack 204' are arranged in a row, and the first battery pack 201' and the second battery pack 202' are at least partially overlapped in the plugging direction, and the third battery pack 203' and the fourth battery pack 204' are at least partially overlapped in the plugging direction. Fig.12 As shown, the first battery pack 201' and the second battery pack 202' are arranged in a row, the third battery pack 203' and the fourth battery pack 204' are also arranged in a row, and the first battery pack 201' and the third battery pack 202' are at least partially overlapped in a direction perpendicular to the plugging direction, and the second battery pack 202' and the fourth battery pack 204' are at least partially overlapped in a direction perpendicular to the plugging direction.

[0070] like Figure 13-15 As shown, the number of battery packs is 6, including a first battery pack 201', a second battery pack 202', a third battery pack 203', a fourth battery pack 204', a fifth battery pack 205' and a sixth battery pack 206', and the plugging and unplugging directions of the six battery packs are the same as those in the first embodiment. Fig.13 As shown, the first battery pack 201', the third battery pack 203', and the fifth battery pack 205' are arranged in a row, and the second battery pack 202', the fourth battery pack 204', and the sixth battery pack 206' are also arranged in a row. At the same time, the first battery pack 201' and the second battery pack 202' are arranged in a row, the third battery pack 203' and the fourth battery pack 204' are arranged in a row, and the fifth battery pack 205' and the sixth battery pack 206' are arranged in a row. Fig.14 As shown, the first battery pack 201', the third battery pack 203', and the fifth battery pack 205' are arranged in a row, and the second battery pack 202', the fourth battery pack 204', and the sixth battery pack 206' are arranged in a row, and the first battery pack 201' and the second battery pack 202' are at least partially overlapped in the plugging direction, the third battery pack 203' and the fourth battery pack 204' are at least partially overlapped in the plugging direction, and the fifth battery pack 205' and the sixth battery pack 206' are at least partially overlapped in the plugging direction. Fig.15As shown, the first battery pack 201' and the second battery pack 202' are arranged in a row, the third battery pack 203' and the fourth battery pack 204' are arranged in a row, and the fifth battery pack 205' and the sixth battery pack 206' are arranged in a row. At the same time, the first battery pack 201', the third battery pack 203', and the fifth battery pack 205' are at least partially overlapped in a direction perpendicular to the plugging direction, and the second battery pack 202', the fourth battery pack 204' and the sixth battery pack 206' are at least partially overlapped in a direction perpendicular to the plugging direction.

[0071] The number of battery packs 20 may be an even number or an odd number greater than or equal to 4. Fig.16 As shown, there are three battery packs, including a first battery pack 201', a second battery pack 202' and a third battery pack 203'. The first battery pack 201' and the second battery pack 202' are arranged in a row, and the first battery pack 201' is at least partially overlapped with the third battery pack 203' in the plugging direction, and the second battery pack 202' is also at least partially overlapped with the third battery pack 203' in the plugging direction. Fig.17 As shown, the number of battery packs is 5, including a first battery pack 201', a second battery pack 202', a third battery pack 203', a fourth battery pack 204' and a fifth battery pack 205'. The first battery pack 201', the third battery pack 203' and the fifth battery pack 205' are arranged in a row, and the first battery pack 201' and the third battery pack 203' are at least partially overlapped with the second battery pack 202' in the plug-in direction, and the third battery pack 203' and the fifth battery pack 205' are at least partially overlapped with the fourth battery pack 204' in the plug-in direction.

[0072] Although the above settings are not as good as Figure 4 and Fig.10 The battery pack arrangement is as compact as in the conventional arrangement in a row or a column, but the size of the battery pack interface on the shell can be reduced as much as possible. Compared with the traditional arrangement in a row or a column, it can still reduce a lot of space, and it can also adapt to the installation of battery packs of different sizes.

[0073] The technical features of the above embodiments can be arranged in any combination. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A backpack power supply assembly for providing electric energy to an electric tool, the backpack power supply assembly comprising: case; A backpack, configured to be worn by an operator and connected to the shell; a plurality of battery packs configured to be removably connected to the housing; It is characterized in that the plurality of battery packs include a first battery pack and a second battery pack, the projections of the first battery pack and the second battery pack on a plane parallel to the longitudinal direction of the shell at least partially overlap, and the projections of the first battery pack and the second battery pack on a plane perpendicular to the longitudinal direction of the shell are arranged at intervals.

2. The backpack power supply assembly according to claim 1, characterized in that: Projections of the first battery pack and the second battery pack on a plane perpendicular to the left-right direction at least partially overlap.

3. The backpack power supply assembly according to claim 1, characterized in that: Several battery packs also include a third battery pack, and the projections of the first battery pack and the third battery pack on a plane perpendicular to the longitudinal direction of the shell at least partially overlap; and / or the projections of the first battery pack and the third battery pack on a plane parallel to the longitudinal direction of the shell are arranged at intervals.

4. The backpack power supply assembly according to claim 1, characterized in that: The battery packs are arranged into at least two groups, and the battery packs in each group are arranged in a column or a row.

5. The backpack power supply assembly according to claim 1, characterized in that: The plurality of battery packs further include a third battery pack and a fourth battery pack, and the first battery pack, the second battery pack, the third battery pack and the fourth battery pack are arranged to form two rows and two columns.

6. The backpack power supply assembly according to claim 1, characterized in that: The plurality of battery packs are configured to be removably connected to the housing by plugging and unplugging, and at least two of the plurality of battery packs have the same plugging and unplugging direction.

7. The backpack power supply assembly according to claim 1, characterized in that: The plurality of battery packs are configured to be removably connected to the housing by plugging and unplugging, and the plugging and unplugging directions of at least two of the plurality of battery packs are parallel to the longitudinal extension direction of the housing.

8. The backpack power supply assembly according to claim 1, characterized in that: The plurality of battery packs are configured to be removably connected to the housing by plugging and unplugging, and at least two of the plurality of battery packs have different plugging and unplugging directions.

9. The backpack power supply assembly according to claim 1, characterized in that: The battery packs are configured to be removably connected to the housing by plugging and unplugging, and the battery packs are divided into two groups, wherein the plugging and unplugging direction of one group of battery packs is perpendicular to the plugging and unplugging direction of the other group of battery packs.

10. A housing, comprising a plurality of battery pack interfaces, wherein the battery pack interfaces are configured to removably connect to a battery pack, characterized in that: The plurality of battery pack interfaces include a first battery pack interface and a second battery pack interface, wherein the projections of the first battery pack interface and the second battery pack interface on a plane parallel to the longitudinal direction of the shell at least partially overlap, and the projections of the first battery pack interface and the second battery pack interface on a plane perpendicular to the longitudinal direction of the shell are spaced apart.

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