A battery pack

Abstract

The application provides a battery pack for powering an electric device, the battery pack comprising a docking structure for docking with the electric device and a locking structure for locking to the electric device, the docking structure comprising two oppositely arranged guide rails extending along a mounting direction of the battery pack to the electric device, the docking structure comprising a first guide surface and a second guide surface, the second guide surface being formed on the guide rails, the first guide surface comprising a first sub-guide surface and a second sub-guide surface, the first sub-guide surface and the second sub-guide surface extending along the mounting direction, the thickness of the guide rails being 5-10 mm, the thickness direction of the guide rails being perpendicular to the mounting direction, the length of the first sub-guide surface along the mounting direction being 18-21 mm, and the length of the second sub-guide surface along the mounting direction being 38-41 mm, so that the guide rails have sufficient strength, and the battery pack is not prone to shaking and falling off when the electric device is working.

Description

Technical Field

[0001] This application relates to the field of power tools, and more particularly to a battery pack. Background Technology

[0002] With the development of technology, power tools have gradually replaced manual tools and entered thousands of households. Lithium-ion power tools are more convenient than tools that use AC power. Lithium-ion power tools have a battery connection part on the body of the power tool. The battery pack is connected and locked to the power tool at the battery connection part. The battery pack is equipped with two guide rails that are slidably connected to the battery connection part. The electrical terminals located inside the power tool housing are connected to the terminal slots on the battery pack, so that the battery pack provides power to the power tool.

[0003] Since the battery pack and the power tool housing are slidably connected via a guide rail, the length and thickness of the guide rail affect the strength of the connection to some extent. If the guide rail is too thin or too short, the battery pack is prone to shaking after locking. When the power tool is in use, the guide rail is easily damaged, and the shaking is transmitted to the handle, which can cause discomfort to the operator and pose a risk of use, potentially causing injury to the operator. Furthermore, if the guide rail is too long, it will affect the volume of the battery pack. Utility Model Content

[0004] This application provides a battery pack that solves the above-mentioned technical problems, and its structure is simple and safe and reliable.

[0005] Specifically, this application provides a battery pack for powering an electric device. The battery pack includes a docking structure for connecting with the electric device and a locking structure for locking to the electric device. The docking structure includes two opposing guide rails extending along the installation direction of the battery pack and the electric device. The docking structure includes a first guide surface, a second guide surface, and a third guide surface. The second guide surface is formed on the guide rail, and the first guide surface connects the second guide surface and the third guide surface. The first guide surface includes a first sub-guide surface and a second sub-guide surface, which extend along the installation direction. The distance between the first sub-guide surfaces of the docking structure is greater than the distance between the two second sub-guide surfaces. The thickness of the guide rail is 5 to 10 mm, and the thickness direction of the guide rail is perpendicular to the installation direction. The length of the first sub-guide surface in the installation direction is 18 to 21 mm, and the length of the second sub-guide surface in the installation direction is 38 to 41 mm. This ensures that the guide rail has sufficient strength, making it difficult for the battery pack to shake or fall off when the electric device is working. It also avoids the battery pack volume from increasing due to the excessive size of the guide rail.

[0006] Furthermore, the second guiding surface of the docking structure includes a third sub-guiding surface and a fourth sub-guiding surface. The distance from the third sub-guiding surface to the third guiding surface is less than the distance from the fourth sub-guiding surface to the third guiding surface. The distance from the third sub-guiding surface to the third guiding surface is 4 to 5 mm, and the distance from the fourth sub-guiding surface to the third guiding surface is 5 to 6 mm. The two second guiding surfaces move closer to the third guiding surface in the installation direction. During the sliding connection with the electric device, the connecting part of the electric device abuts against the second guiding surface. During the movement, the pressure on the third sub-guiding surface is greater than that on the fourth sub-guiding surface, thereby making the connection of the battery pack more stable.

[0007] Furthermore, the first guide surface includes a first connecting surface, which is obliquely intersecting the first sub-guide surface and the second sub-guide surface. The distance between the two first sub-guide surfaces is 40 to 45 mm, and the distance between the two second sub-guide surfaces is 39 to 44 mm. The two first guide surfaces form an outward expansion trend in the installation direction. During the sliding connection with the electric device, the connecting part of the electric device abuts against the first guide surface. During the movement, the pressure on the first sub-guide surface is greater than that on the second sub-guide surface.

[0008] Furthermore, the first sub-guide surface is parallel to the second sub-guide surface, and the first sub-guide surface and the second sub-guide surface form a step in the installation direction, which can increase the contact area between the connection part of the electric device and the first guide surface, thereby making the installation of the battery pack more stable and less prone to shaking.

[0009] Furthermore, the battery pack includes a second connecting surface, which is obliquely intersecting the third sub-guide surface and the fourth sub-guide surface, respectively.

[0010] Furthermore, the third sub-guide surface is parallel to the fourth sub-guide surface, and the third and fourth sub-guide surfaces form a step in the installation direction, which increases the contact area between the connection part of the electric device and the second guide surface, thereby making the installation of the battery pack more stable.

[0011] Furthermore, in the direction of battery pack installation to electric device, the first connecting surface is further forward than the second connecting surface. The electric device connection part first increases pressure on the first guide surface and then increases pressure on the second guide surface. When the battery pack moves to the end of its stroke along the installation direction, the electric device installation part is subjected to pressure from the first guide surface and the second guide surface.

[0012] Furthermore, the battery pack includes two corresponding guide protrusions. In the direction in which the battery pack is installed to the electric device, the guide protrusions are positioned further forward relative to the guide rail. The guide protrusions are configured to guide the connection between the battery pack and the electric device connection portion.

[0013] Furthermore, the distance between the two guide protrusions is less than the distance between the two first sub-guide surfaces and the distance between the two second sub-guide surfaces. The closer distance between the two guide protrusions makes it less likely for the battery pack to interfere with the connection of the electric device, and makes installation easier.

[0014] Furthermore, the docking structure includes a terminal slot located between two guide protrusions. The distance between the center lines of two adjacent terminal slots is 6 to 7 mm. If the distance between the two terminal slots is too close, electronic interference will occur, thereby affecting the service life of the battery pack or the electric device. If the distance between the two terminal slots is too far, the size of the electric device connection part will be too large, thereby affecting the electric device housing and the user experience.

[0015] Furthermore, the locking structure includes a locking member and an elastic member that drives the locking member to protrude from the docking structure, the locking member passing through the docking structure and configured to lock to the electric device.

[0016] In this application, the length of the first sub-guide surface of the battery pack in the installation direction is 18 to 21 mm, the length of the second sub-guide surface in the installation direction is 38 to 41 mm, and the thickness of the guide rail is 5 to 10 mm. This ensures that the guide rail has sufficient strength, so that the battery pack is not easy to shake or fall off when the electric device is working. It also avoids the battery pack volume from increasing due to the excessive size of the guide rail. Attached Figure Description

[0017] Figure 1 This is a perspective view of a battery pack according to an embodiment of this application.

[0018] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the battery pack from another angle.

[0019] Figure 3 yes Figure 1 A magnified view of a portion of the battery pack guide rail section.

[0020] Figure 4 yes Figure 1 The battery pack shown is a top view.

[0021] Figure 5 yes Figure 4 The image shows a cross-sectional view of the battery pack. Detailed Implementation

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper," etc., are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including," etc., mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] Please combine Figures 1 to 5This application provides a battery pack 100 for powering an electric device. The battery pack 100 includes a docking structure 101 for docking with an electric device (not shown) and a locking structure 102 for locking to the electric device. The docking structure 101 includes two guide rails 103 arranged opposite to each other, extending along the installation direction of the electric device in the battery pack 100. The docking structure 101 includes a first guide surface 1, a second guide surface 2, and a third guide surface 3. The second guide surface 2 is formed on the guide rail 103, and the first guide surface 1 connects the second guide surface 2 and the third guide surface 3. The first guide surface 1 includes a first sub-guide surface 11 and a second sub-guide surface 12. The first sub-guide surface 11 and the second guide surface 12 are connected. The two sub-guide surfaces 12 extend along the installation direction. The distance between the first sub-guide surfaces 11 of the docking structure 101 is greater than the distance between the two second sub-guide surfaces 12. The thickness of the guide rail 103 is 5 to 10 mm, and the thickness direction of the guide rail 103 is perpendicular to the installation direction. The length of the first sub-guide surface 11 in the installation direction is 18 to 21 mm, and the length of the second sub-guide surface 12 in the installation direction is 38 to 41 mm. This ensures that the guide rail 103 has sufficient strength, so that the battery pack 100 is not easy to shake or fall off when the electric device is working. It also avoids the battery pack 100 from becoming too large due to the size of the guide rail 103.

[0025] Preferably, the second guide surface 2 of the docking structure 101 includes a third sub-guide surface 21 and a fourth sub-guide surface 22. The distance from the third sub-guide surface 21 to the third guide surface 3 is less than the distance from the fourth sub-guide surface 22 to the third guide surface 3. The distance from the third sub-guide surface 21 to the third guide surface 3 is 4 to 5 mm, and the distance from the fourth sub-guide surface 22 to the third guide surface 3 is 5 to 6 mm. The two second guide surfaces 2 move closer to the third guide surface 3 in the installation direction. During the sliding connection with the electric device, the connecting part of the electric device abuts against the second guide surface 2. During the movement, the pressure on the third sub-guide surface 21 is greater than that on the fourth sub-guide surface 22, thereby making the connection of the battery pack 100 more stable.

[0026] Combination Figure 2 and Figure 3The first guide surface 1 includes a first connecting surface 13, which is obliquely intersecting the first sub-guide surface 11 and the second sub-guide surface 12. The distance between the two first sub-guide surfaces 11 is 40 to 45 mm, and the distance between the two second sub-guide surfaces 12 is 39 to 44 mm. The two first guide surfaces 1 have an outward expansion trend in the installation direction. During the sliding connection with the electric device, the connecting part of the electric device abuts against the first guide surface 1. During the movement, the pressure on the first sub-guide surface 11 is greater than that on the second sub-guide surface 12. The first sub-guide surface 11 is parallel to the second sub-guide surface 12, and the first sub-guide surface 11 and the second guide surface 12 form a step in the installation direction, which increases the contact area between the connecting part of the electric device and the first guide surface 1, thereby making the installation of the battery pack 100 more stable and less prone to shaking.

[0027] The battery pack 100 includes a second connecting surface 23, which is obliquely intersecting the third sub-guide surface 21 and the fourth sub-guide surface 22. The third sub-guide surface 21 is parallel to the fourth sub-guide surface 22, and the third sub-guide surface 21 and the fourth sub-guide surface 22 form a step in the installation direction, which increases the contact area between the connecting part of the electric device and the second guide surface 2, thereby making the installation of the battery pack 100 more stable.

[0028] Preferably, in the direction in which the battery pack 100 is installed to the electric device, the first connecting surface 13 is further forward than the second connecting surface 23. The electric device connection part first applies pressure on the first guide surface 1 and then applies pressure on the second guide surface 2. When the battery pack 100 moves to the end of its stroke along the installation direction, the electric device installation part is subjected to pressure from the first guide surface 1 and the second guide surface 2.

[0029] Combination Figure 4 The battery pack 100 includes two corresponding guide protrusions 4. In the direction in which the battery pack 100 is installed to the electric device, the guide protrusions 4 are positioned further forward relative to the guide rail 103. The guide protrusions 4 are configured to guide the connection between the battery pack 100 and the electric device connection part. The distance between the two guide protrusions 4 is less than the distance between the two first sub-guide surfaces 11 and the two second sub-guide surfaces 12. The closer distance between the two guide protrusions 4 makes it less likely for the battery pack 100 to interfere with the connection between it and the electric device connection part, thus facilitating installation.

[0030] Preferably, the docking structure 101 includes a terminal slot 5 located between two guide protrusions 4. The distance between the center lines of two adjacent terminal slots 5 is 6 to 7 mm. If the distance between the two end slots 5 is too close, electronic interference will occur, thereby affecting the service life of the battery pack 100 or the electric device. If the distance between the two end slots 5 is too far, the size of the electric device connection part will be too large, thereby affecting the electric device housing and the user experience. The locking structure 102 includes a locking member 6 and an elastic member (not shown) that drives the locking member 6 to protrude from the docking structure 101. The locking member 6 passes through the docking structure 101 and is configured to lock to the electric device.

[0031] In this application, the length of the first sub-guide surface 11 of the battery pack 100 in the installation direction is 18 to 21 mm, and the length of the second sub-guide surface 12 in the installation direction is 38 to 41 mm. This ensures that the guide rail 103 has sufficient strength, so that the battery pack 100 is not easy to shake or fall off when the electric device is working. It also avoids the battery pack 100 from becoming too large due to the guide rail 103.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack for supplying power to an electric device, the battery pack comprising a docking structure for engaging with the electric device and a locking structure for locking to the electric device, the docking structure comprising two opposing guide rails extending along the mounting direction of the battery pack and the electric device, characterized in that: The docking structure includes a first guide surface and a second guide surface, the second guide surface being formed on the guide rail. The first guide surface includes a first sub-guide surface and a second sub-guide surface, the first sub-guide surface and the second sub-guide surface being arranged and extending along the installation direction. The thickness of the guide rail is 5 to 10 mm, the thickness direction of the guide rail is perpendicular to the installation direction, the length of the first sub-guide surface in the installation direction is 18 to 21 mm, and the length of the second sub-guide surface in the installation direction is 38 to 41 mm.

2. The battery pack according to claim 1, characterized in that, The docking structure further includes a third guiding surface, the first guiding surface connects the second guiding surface and the third guiding surface, the second guiding surface of the docking structure includes a third sub-guiding surface and a fourth sub-guiding surface, the distance from the third sub-guiding surface to the third guiding surface is 4 to 5 mm, and the distance from the fourth sub-guiding surface to the third guiding surface is 5 to 6 mm.

3. The battery pack according to claim 2, characterized in that, The first guide surface includes a first connecting surface, which is obliquely intersecting the first sub-guide surface and the second sub-guide surface.

4. The battery pack according to claim 3, characterized in that, The first sub-guide surface is parallel to the second sub-guide surface.

5. The battery pack according to claim 4, characterized in that, The battery pack includes a second connecting surface, which is obliquely intersecting the third sub-guide surface and the fourth sub-guide surface, respectively, and the third sub-guide surface is parallel to the fourth sub-guide surface.

6. The battery pack according to claim 5, characterized in that, In the direction in which the battery pack is installed to the electric device, the first connecting surface is further forward than the second connecting surface.

7. The battery pack according to claim 1, characterized in that, The battery pack includes two corresponding guide protrusions, which are positioned further forward relative to the guide rail in the direction in which the battery pack is installed onto the electric device.

8. The battery pack according to claim 7, characterized in that, The distance between the two guide bumps is less than the distance between the two first sub-guide surfaces and the distance between the two second sub-guide surfaces.

9. The battery pack according to claim 7, characterized in that, The docking structure includes multiple terminal slots, which are located between two guide protrusions, and the distance between the center lines of two adjacent terminal slots is 6 to 7 mm.

10. The battery pack according to claim 1, characterized in that, The distance between the two first sub-guide surfaces is 40 to 45 mm, and the distance between the two second sub-guide surfaces is 39 to 44 mm.

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