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, entitled "Backpack Power Pack"

[0002] "File", a 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 to provide power to the power tool. The power tool may be a handheld hair dryer, a high-pressure washer, 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 long-term operation. Usually, a number of battery packs are installed on the shell of the backpack power supply assembly. The battery packs and the shell are connected by electrical connectors to achieve electrical connection. The battery packs can be removed relative to the shell to charge or replace the battery packs. At present, the arrangement of the battery packs adopts a single-column structure, that is, when the user carries it on his back, a number of battery packs are arranged in a row in the battery pack. However, this method has the following problems: since 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 placed 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 on his back.

[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 by plugging and unplugging, the plurality of battery packs comprising at least one first battery pack, a second battery pack and a third battery pack, the first battery pack being arranged to at least partially overlap with the second battery pack in the plugging and unplugging direction, and being arranged to at least partially overlap with the third battery pack in a direction perpendicular to the plugging and unplugging direction.

[0007] Compared with the existing technology, 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 conducive to carrying and standing. Most importantly, through this setting, multiple packs can be 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 an area of the projection 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 an area of the projection 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, and the shell and the flip cover form a battery cavity for accommodating a plurality of battery packs. 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 housing, and the flip cover rotates relative to the housing to open or close the battery cavity.

[0017] Furthermore, the flip cover includes at least 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. 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 several battery pack interfaces, and the battery pack can be removably connected to the battery pack interfaces through plugging and unplugging actions. It is characterized in that the several 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 arranging 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, making it easy to store and carry.

[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 with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram 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 with the cover opened is shown;

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

[0027] Figure 4 for Figure 1 The schematic diagram of the backpack power supply assembly shown is in the state without the flip cover shown;

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

[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 structural diagram of a backpack power supply assembly according to another embodiment of the present invention;

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

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

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

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the 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 Figures 1 to 3 The backpack power supply assembly 100 shown in one embodiment of the present invention includes a housing 10 for an operator to wear, a backpack device (not shown) 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 that can be worn or tied, or the backpack device can be a wearable assembly with a backpack belt, which can be mechanically connected to the power tool.

[0040] Normally, 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 the carrying device. The working state of the backpack power supply assembly 100 is taken as the reference direction, wherein the direction in which the back and the front of the operator are facing when carrying the backpack power supply assembly 100 is the front-to-back direction ( Figure 2 The direction indicated by the arrow c is the back direction, 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 and right direction (such as Figure 1 、 Figure 3 (the direction indicated by arrows a1-a2).

[0041] Please combine Figure 2 、 Figure 3 and Figure 5 The housing 10 includes a back plate 11, which is partially hollow to accommodate the circuit board. The back plate 11 includes a back surface 111 that rests against the operator's back or is close to the operator and perpendicular to the ground, and a docking surface 112 that is opposite to the back surface 111. The back surface 111 is generally flat or quasi-flat. 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 can 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 battery pack structure utilizes existing technology and will not be described in detail here. In this embodiment, the battery packs include at least one first battery pack 201, a second battery pack 202, and a third battery pack 203. The first battery pack 201 at least partially overlaps the second battery pack 202 in the insertion and removal direction, and at least partially overlaps the third battery pack 203 in a direction perpendicular to the insertion and removal direction.

[0043] Accordingly, if Figure 3As shown, the 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 connect to the first battery pack 201, the second battery pack interface 102 is used to connect to the second battery pack 202, and the third battery pack interface 103 is used to connect to 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 and unplug direction, and at least partially overlapped with the third battery pack interface 103 in a direction perpendicular to the plug-in and unplug direction. The plug-in direction includes an insertion direction and an extraction direction. The insertion direction refers to the direction in which the battery pack is inserted into the battery pack interface to achieve mechanical and electrical connection between the battery pack and the battery pack interface. The extraction direction refers to the direction in which the battery pack is extracted from the battery pack interface to disconnect the battery pack from the battery pack interface. This makes the overall proportions of the housing 10 more coordinated, making it easier to carry and stand.

[0044] Furthermore, on a plane perpendicular to the insertion and removal direction, the ratio of the overlapping area between the projections of the first battery pack 201 and the second battery pack 202 to the projected area of the first battery pack 201 or the second battery pack 202 is greater than or equal to 50%. On a plane parallel to the insertion and removal direction, the ratio of the overlapping area between the projections of the first battery pack 201 and the third battery pack 203 to the projected area of the first battery pack 201 or the third battery pack 203 is greater than or equal to 50%. This allows the first battery pack 201, the second battery pack 202, and the third battery pack 203 to be arranged more compactly and in a more balanced proportion, making the carrying more comfortable for the operator.

[0045] Furthermore, at least two of the multiple battery packs have the same insertion and removal direction. In this embodiment, the first battery pack 201, the second battery pack 202, and the third battery pack 203 all have the same insertion and removal direction. By making at least two battery packs have the same insertion and removal direction, the inconvenience caused by inconsistent insertion and removal directions in the prior art is resolved, making it easier for operators to insert or remove the battery packs.

[0046] In other embodiments, several battery packs may be arranged with different plug-in and unplug-in directions. For example, the battery packs may be divided into two groups, with the plug-in and unplug-in directions of one group of battery packs being different from those of the other group, such as being arranged perpendicularly or at an angle to each other. In other embodiments, when three or more groups are arranged, the plug-in and unplug-in directions of some or all battery pack groups may be the same, or all battery pack groups may have different plug-in and unplug-in directions. This is not further elaborated here.

[0047] In order to facilitate plugging and unplugging, at least two battery packs among 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. 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 direction of the insertion and removal is perpendicular to the direction indicated by the arrow b in the middle, so that the vertical dimension of the shell 10 is further reduced. Through this arrangement, the battery pack is compactly arranged and small in size, suitable for the operator to carry on the back. In this way, the battery pack can be plugged in and out along the direction perpendicular to the longitudinal axis of the shell 10, which can effectively reduce the longitudinal dimension of the shell 10 and facilitate the operator to carry it on the back. Of course, in other embodiments, the plugging and removal direction can also be parallel to the longitudinal extension direction of the shell 10, such as Figure 9 and Figure 10 As shown, alternatively, the battery pack and the longitudinal extension axis of the housing 10 are arranged at an acute angle or an obtuse angle, thereby reducing the width dimension of the housing 10.

[0049] In this embodiment, the number of battery packs is four, namely a first battery pack 201, a second battery pack 202, a third battery pack 203, and a fourth battery pack 204. The first battery pack 201 and the second battery pack 202, and the third battery pack 203 and the fourth battery pack 204 are arranged opposite each other along the left-right direction of the housing, while the first battery pack 201 and the third battery pack 203, and the second battery pack 202 and the fourth battery pack 204 are spaced apart along the top-bottom direction of the housing. The first battery pack 201 and the third battery pack 203 have the same insertion and removal directions: they are inserted from the outside of the housing toward the inside of the housing in a direction perpendicular to the longitudinal axis of the housing 10, i.e., in the direction of arrow a2. They are also removed from the inside of the housing toward the outside of the housing in a direction perpendicular to the longitudinal axis of the housing 10, i.e., in the direction of arrow a1. Similarly, the second battery pack 202 and the fourth battery pack 204 have the same insertion and removal directions: they are inserted from the outside of the housing toward the inside of the housing and in a direction perpendicular to the longitudinal axis of the housing 10, i.e., insertion along the direction of arrow a1, and are removed from the inside of the housing toward the outside of the housing and in a direction perpendicular to the longitudinal axis of the housing 10, i.e., removal along the direction of arrow a2. Therefore, the insertion direction of the first and third battery packs 201 and 203 is opposite to the insertion direction of the second and fourth battery packs 202 and 204, and the removal direction of the first and third battery packs 201 and 203 is opposite to the removal direction of the second and fourth battery packs 202 and 204. This arrangement prevents interference between the insertion and removal of multiple battery packs, allowing the operator to simultaneously insert and remove multiple battery packs, making the operation 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 housing 10 is smaller, and the overall proportions of the backpack power supply assembly 100 are 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 caused by inconsistent plug-in and unplugging directions in the prior art is solved, thereby making it easier for the operator to insert or remove the battery packs. In order to facilitate plugging and unplugging, the battery packs are arranged into a first battery pack group and a second battery pack group arranged in back-to-back positions. 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 arranged crosswise, that is, the battery packs in the 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 battery pack in the other group, 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 horizontal direction.

[0051] See 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, thereby enabling 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. The rotation angle of the flip cover 40 relative to the housing 10 is between 35 and 90 degrees. If the rotation angle is too large, the flip cover will take up too much space when opened, while if the rotation angle is too small, it will be impossible to open the flip cover 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 in other configurations. The flip cover 40 can achieve dust and water resistance, help protect the battery pack 20, and also improve the appearance.

[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 structure (not shown). For details, please refer to 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 opposing 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 edge 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 includes at least 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. 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, ensuring 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 in the same position as the second flip cover 402, and the second flip cover 402 can also be installed in the same position as the first flip cover 401, 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 mounted with a bracket 14, and a first flip cover 401 and a 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, while 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 mounted on the bracket 14 so as to be rotatable relative to each other. 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 at both ends of the first sleeve portion 140, and a third limiting portion 144 and a fourth limiting portion 145 at both ends of the second sleeve portion 141. The first and third lugs 4010 and 4020 are sleeved onto the first sleeve portion 140, with the first and second stop portions 142 and 143 restricting axial movement of the first and third lugs on the first sleeve portion 140. The second and fourth lugs 4011 and 4021 are sleeved onto the second sleeve portion 141, with the third and fourth stop portions 144 and 145 restricting axial movement of the second and fourth lugs 4011 and 4021 on the second sleeve portion 141. Both the first and second flip covers 401 and 402 rotate about the central axis X of the bracket 14. This allows the first and second flip covers 401 and 402 to share the bracket 14 and the same rotation axis, enabling compact installation and minimizing the footprint of the backpack power supply assembly 100.

[0055] The battery cavity 30 includes a first battery cavity 301 and a second battery cavity 302 located on either side of the bracket 14. The first flip cover 401 is closed relative to the housing 10 to seal the first battery cavity 301, and the second flip cover 402 is closed relative to the housing 10 to seal the second battery cavity 302. The battery pack disposed in the first battery cavity 301 is inserted or removed through the first plug-in port 501, and the battery pack disposed in the second battery cavity 302 is inserted or removed through the second plug-in port 502. The first plug-in port 501 and the second plug-in port 502 open in opposite directions. The battery packs housed in the first battery cavity 301 and the second battery cavity 302 are inserted in opposite directions. It should be noted that, in the present embodiment, only two battery packs are provided in one battery cavity, while in other embodiments, more battery packs may be provided 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 slid out of the first plug port 501 first, and then the battery packs in a row away 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 away from the first plug port 501 are slid into the battery cavity 30 first, and then the battery packs in a row close to the first plug port 501 are loaded in sequence.

[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 further 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 lower row. This arrangement can make the arrangement of the battery packs in the battery cavity 30 more regular, fully utilize the space in the battery cavity 30, and make the backpack power supply assembly 100 smaller and more convenient for the operator to carry. The distance between the upper battery pack in each column and the back surface 111 of the housing 10 is equal to the distance between the lower battery pack and the back surface 111 of the housing 10. This arrangement can make the arrangement of the battery packs in the battery cavity 30 more regular, fully utilize the space in the battery cavity 30, and make the backpack power supply assembly 100 smaller and more convenient for the operator to carry.

[0058] The following is a detailed example using the four battery packs of this embodiment. Figure 2 and Figure 4 The distance between the first battery pack 201 and the second battery pack 202 and the back surface 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 surface 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 battery packs are arranged as follows: 1. The distance between the upper battery pack in each column and the back 111 of the backpack is equal to the distance between the lower battery pack and the back 111 of the backpack; 2. The distance between the two battery packs in the upper row is equal to the distance between the two battery packs in the lower row. However, 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 2The symbols D1 and D2 indicate that the first and third battery packs 201 and 203 are both located at a distance D1 from the back surface 111 of the flip cover 40, while the second and fourth battery packs 202 and 204 are both located at a distance D2 from the back surface 111 of the flip cover 40. D1 < D2 or D1 > D2. This arrangement accommodates the arrangement of battery packs of varying sizes within 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 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, where S1 < S2 or S1 > S2. However, in both this embodiment and the variant, the distance S between two adjacent battery packs in the same row can be adjusted according to actual needs.

[0062] See 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. The differences are as follows: 1. It has only one battery cavity 30' and one flip cover 40', and all battery packs are arranged in the battery cavity 30'; 2. It has only one opening (unnumbered), and all battery packs have the same insertion direction and the same removal direction. The battery pack insertion and removal directions 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 in 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 lower row. This arrangement is to reserve space for the housing 10' and the flip cover 40' to be locked. The distance between the upper battery pack in each column and the back surface 111' of the housing 10' is less than the distance between the lower battery pack and the back surface 111' of the housing 10'. This arrangement minimizes the distance between the battery pack in the upper row and the back surface 111' of the housing 10', thereby providing space for the battery packs in the lower row to be plugged in and out, facilitating the insertion and removal of the battery packs in the lower row.

[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 surface 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 surface 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' ( Figure 10 The third battery pack 203' and the fourth battery pack 204' are symmetrically arranged along the central axis of the housing 10' (the dashed line dd represents the central axis of the housing 10'). It should be noted that due to the differences in D1 and D2, the positions of the battery pack interfaces corresponding to the different battery packs are also different. That is, the battery pack interfaces 101 and 102 corresponding to the first battery pack 201' and the second battery pack 202' are positioned relatively rearward.

[0065] In the above embodiment 1, the plugging and unplugging directions of the two battery packs are opposite, and the openings are located on the side. 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. In this embodiment 2, the plugging and unplugging directions of all battery packs are the same in the vertical direction ( Figure 8 In the direction indicated by arrow b). However, both the first and second embodiments enable the operator to conveniently insert or remove the battery pack, and there is no need to reserve insertion and removal space for adjacent battery packs within the battery cavity 30'. Therefore, the space within the battery cavity 30' can be fully utilized, reducing the overall volume of the backpack power supply assembly 100', making it easier for the operator to carry it.

[0066] In Example 1 and Example 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 plug-in and unplugging directions of the battery packs in all groups are the same, or they can be different or partially different. When the plug-in and unplugging directions are different, in order to meet the plug-in and unplugging operability of the battery packs, the battery pack interfaces that dock 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 that dock with the battery packs in two adjacent rows are mirrored on both sides along the central axis between the battery packs in the two adjacent rows, that is, the battery packs in the two adjacent rows are mirrored and also arranged opposite to each other. In this design, the plug-in 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 plug-in and unplugging space must be left between the battery pack 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 pack 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. 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 ease of description, they are named from top to bottom: first row of battery packs, second row of battery packs, third row of battery packs, and fourth row of battery packs. Accordingly, the docking portion docking with the first row of battery packs is named first row of docking portions, the docking portion docking with the second row of battery packs is named second row of docking portions, the docking portion docking with the third row of battery packs is named third row of docking portions, and the docking portion docking with the fourth row of battery packs is named fourth row of docking portions. In actual design, the four rows of docking portions can be combined in pairs to be arranged opposite to each other in the vertical direction, or two of the rows of docking portions can be arranged opposite to each other in the vertical direction. For example, the first row of docking portions and the second row of docking portions are arranged opposite to each other in the vertical direction. In this case, the corresponding first row of battery packs and the second row of battery packs are arranged opposite to each other in the vertical direction, and the insertion and removal directions of the two are opposite. In this case, sufficient insertion and removal space must be set between the second row of battery packs and the third row of battery packs, that is, the distance between the second row of battery packs and the third row of battery packs must be greater than or equal to the insertion and removal movement 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. This distance is the plug-in space.

[0067] The above-mentioned backpack power supply assembly arranges several 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 existing technology, the vertical dimension of the shell is reduced by at least half, thereby making the arrangement proportions of the backpack power supply assembly more coordinated, which is conducive to carrying and standing. The most important thing is that 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 Figures 11 to 17 , showing seven different battery pack layouts. Each one is explained below.

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

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

[0071] The number of battery packs 20 can be an even number or an odd number greater than or equal to 4, such as Figure 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 plug-in direction, and the second battery pack 202' is also at least partially overlapped with the third battery pack 203' in the plug-in direction. Figure 17 As shown, there are five battery packs, 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. The first battery pack 201' and the third battery pack 203' are arranged at least partially overlapping with the second battery pack 202' in the insertion and removal direction. The third battery pack 203' and the fifth battery pack 205' are arranged at least partially overlapping with the fourth battery pack 204' in the insertion and removal direction.

[0072] Although the above settings are not as good as Figure 4 and Figure 10 The battery pack arrangement is as compact as in the previous example, but the size of the battery pack interface on the shell can be minimized as much as possible. Compared with the traditional arrangement in a row or a column, it can still reduce a lot of space. In addition, 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 merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A backpack power supply assembly for providing power to a power 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 multiple battery packs include a first battery pack, a second battery pack and a third 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 third battery pack on a plane perpendicular to the longitudinal direction of the shell at least partially overlap.

2. The backpack power supply assembly according to claim 1, wherein: 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; and / or the 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, wherein: The first battery pack and the third battery pack are spaced apart from each other in their projections on a plane parallel to the longitudinal direction of the housing.

4. The backpack power supply assembly according to claim 1, wherein: 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, wherein: The plurality of battery packs further includes 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, wherein: 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, wherein: 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, wherein: 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, wherein: The battery packs are configured to be removably connected to the housing by plugging and unplugging. 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 multiple battery pack interfaces include at least one first battery pack interface, a second battery pack interface, and a third 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 third battery pack interface on a plane perpendicular to the longitudinal direction of the shell at least partially overlap.

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