Battery pack and electric tool

Abstract

The utility model provides a battery pack and an electric tool, and the battery pack comprises a shell which is provided with a first accommodating cavity; the battery pack frame is arranged in the first accommodating cavity, and the battery pack frame is provided with a second accommodating cavity; and the battery pack comprises a control panel, the control panel is installed on one side of the battery pack and electrically connected with the battery pack, and the battery pack and the control panel are packaged in the second containing cavity. The battery pack framework is introduced into the shell of the battery pack, the battery pack and the control panel are assembled and then packaged in the battery pack framework in a glue filling manner, and the battery pack is isolated from the shell through the battery pack framework, so that the glue filling space can be reduced, the weight of a battery pack product is reduced, and the energy density ratio of the battery pack is increased; the waterproof, dustproof and explosion-proof functions of the battery pack can be effectively improved, and meanwhile, the structure of the whole battery pack can be simplified.

Description

Technical Field

[0001] The present application relates to the field of battery power supply technology, and in particular to a battery pack and an electric tool. Background Art

[0002] Battery packs are widely used in power tools to provide power for them. For current soft pack batteries, multiple battery cells are directly stacked into a battery pack, which is then installed in the housing cavity together with the mainboard and power board, and then sealed by glue filling. Since there is a large space between the housing and the battery pack, mainboard and power board, the glue filling space is relatively large, and more glue filling materials need to be filled, which increases the weight of the battery pack, thereby limiting the improvement of the energy density of the battery pack. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a battery pack and an electric tool that can reduce the glue filling space, reduce the weight of the battery pack, and thus improve the energy density of the battery pack.

[0004] To achieve the above objectives and other related objectives, the present application provides a battery pack, including:

[0005] A battery pack frame is disposed in the first accommodating cavity, and the battery pack frame has a second accommodating cavity; and

[0006] A battery pack, wherein the battery pack comprises a control board, wherein the control board is mounted on one side of the battery pack and is electrically connected to the battery pack, and the battery pack and the control board are encapsulated in the second accommodating cavity.

[0007] In an optional embodiment of the present application, a light board is further included, wherein the light board is installed at the upper end of the battery pack frame, and the light board is electrically connected to the control board.

[0008] In an optional embodiment of the present application, the shell includes an upper cover and a lower shell, and the lower shell and the upper cover form the first accommodating cavity.

[0009] In an optional embodiment of the present application, the upper cover is provided with a first opening, and the first opening is arranged opposite to the lamp bead area of ​​the lamp board; a transparent lampshade is provided on the side of the upper cover away from the light board, and the transparent lampshade seals the first opening.

[0010] In an optional embodiment of the present application, the upper cover is provided with a second opening, the second opening is arranged opposite to the touch area of ​​the light board, a button is arranged in the second opening, and the button is in contact with the touch area of ​​the light board.

[0011] In an optional embodiment of the present application, it further includes a terminal assembly and a conductive bar assembly, wherein the terminal assembly and the conductive bar assembly are installed at the lower end of the battery pack frame, and the terminal assembly is electrically connected to the control board through the conductive bar assembly.

[0012] In an optional embodiment of the present application, a waterproof pad is further included, and the waterproof pad is arranged between the terminal assembly and the battery pack frame.

[0013] In an optional embodiment of the present application, the heat insulation sheet is arranged between the waterproof pad and the battery pack frame.

[0014] In an optional embodiment of the present application, the conductive bar assembly includes a plurality of conductive bars, the terminal assembly includes a plurality of connecting terminals, and the connecting terminals are connected to a plurality of ports of the control board through the conductive bars.

[0015] In an optional embodiment of the present application, the terminal assembly includes a positive output terminal, a charging terminal, a communication terminal and a negative output terminal arranged at intervals, the center distance between the positive output terminal and the negative output terminal is between 34mm-38mm, and the center distance between the communication terminal and the charging terminal is between 10mm-14mm.

[0016] In an optional embodiment of the present application, the battery pack frame includes a nylon frame or a PVC frame with an opening on one side.

[0017] In an optional embodiment of the present application, the energy density of the battery pack is greater than or equal to 170Wh / cm 3 , less than or equal to 290Wh / cm 3 .

[0018] In an optional embodiment of the present application, the energy density of the battery pack is greater than or equal to 169Wh / kg and less than or equal to 250Wh / kg.

[0019] In an optional embodiment of the present application, the battery pack is a soft-pack battery.

[0020] To achieve the above-mentioned and other related purposes, the present application also provides an electric tool, including a tool and a battery pack;

[0021] The battery pack comprises:

[0022] The housing has a first accommodating cavity;

[0023] A battery pack frame is disposed in the first accommodating cavity, and the battery pack frame has a second accommodating cavity; and

[0024] A battery pack, wherein the battery pack comprises a control board, wherein the control board is mounted on one side of the battery pack and is electrically connected to the battery pack, and the battery pack and the control board are encapsulated in the second accommodating cavity.

[0025] The battery pack of the present application introduces a battery pack frame into the battery pack shell, assembles the battery pack and the control board and encapsulates them in the battery pack frame by means of glue injection, and isolates the battery pack from the shell through the battery pack frame. This not only reduces the glue injection space, thereby reducing the weight of the battery pack product and improving the energy density ratio of the battery pack, but also effectively enhances the waterproof, dustproof and explosion-proof functions of the battery pack, while also simplifying the entire battery pack structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a three-dimensional view of an electric bag according to an embodiment of the present application.

[0027] Figure 2 Shown is a side view of an electric bag according to an embodiment of the present application.

[0028] Figure 3 Shown is an exploded view of an electric pack according to an embodiment of the present application.

[0029] Figure 4 Shown is an exploded view of a top cover according to an embodiment of the present application.

[0030] Figure 5 Shown is a bottom view of a battery pack with an upper cover and a lower shell removed according to an embodiment of the present application.

[0031] Figure 6 Shown is a bottom view of a battery pack according to an embodiment of the present application.

[0032] Description of symbols

[0033] Upper cover 10; transparent lampshade 11; third opening 111; soft rubber button 12; fourth opening 121; protrusion 13; second opening 14; first opening 15; lower shell 20; water leakage hole 21; battery pack 30; control board 40; conductive bar assembly 41; first conductive bar 411; second copper 412; third conductive bar 413; fourth conductive bar 414; high-temperature insulating glue 415; fuse 42; battery pack frame 50; lamp board 60; lampshade 61; terminal assembly 70; positive output terminal 71; charging terminal 72; communication terminal 73; negative output terminal 74; guide positioning groove 75; waterproof pad 80; thermal insulation sheet 90. DETAILED DESCRIPTION

[0034] The following describes the implementation of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0035] See also Figure 1-Figure 6 It should be noted that the illustrations provided in this embodiment are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] In order to further improve the energy density of the battery pack, this embodiment provides a Figure 1-6 The battery pack shown can be used as a power source for an electric tool and is mounted on the tool body of the electric tool to power the electric tool. The electric tool can be a lawn mower, a pruner, a hair dryer, an electric saw, a sander, a push mower, a cleaning machine, a vacuum cleaner, an electric drill, an electric hammer, a lawn mower, an electric wrench, a cleaning device, etc.

[0037] See also Figure 1-Figure 6 The battery pack includes a shell, a battery pack frame 50, a battery pack 30 and a control board 40. The shell has a first accommodating cavity, the battery pack frame 50 is arranged in the first accommodating cavity, and the battery pack frame 50 has a second accommodating cavity; the control board 40 is installed on one side of the battery pack 30 and is electrically connected to the battery pack 30, and the battery pack 30 and the control board 40 are encapsulated in the second accommodating cavity by means of glue injection. By introducing the battery pack frame 50 into the shell of the battery pack, the battery pack 30 and the control board 40 are assembled and encapsulated in the battery pack frame 50 by means of glue injection, and the battery pack 30 is isolated from the shell by the battery pack frame 50, which can not only reduce the glue injection space, thereby reducing the weight of the battery pack product and improving the energy density ratio of the battery pack, but also effectively improve the waterproof, dustproof and explosion-proof functions of the battery pack, and at the same time simplify the entire battery pack structure.

[0038] The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1-Figure 6The housing is a sealing structure that is approximately rectangular, and mainly includes an upper cover 10 and a lower housing 20. The lower housing 20 is an integrally formed structure, and the upper end of the lower housing 20 is open. The upper cover 10 is connected to the upper end of the lower housing 20 to close the lower housing 20, forming a first accommodating cavity for accommodating the battery pack 30, the battery pack frame 50, the control board 40, the terminal assembly 70, and the conductive bar assembly 41. The upper cover 10 and the lower housing 20 can be detachably connected by snapping or bolting, which can facilitate maintenance.

[0040] In order to improve the sealing performance, the connection between the upper cover 10 and the lower shell 20 may also be coated with silicone sealant, and the gap between the upper cover 10 and the lower shell 20 may be filled with the silicone sealant to improve the sealing performance of the battery pack and improve the waterproof effect of the entire battery pack.

[0041] See also Figure 1-Figure 6 The upper cover 10 is provided with a first opening 15 and a second opening 14, the second opening 14 is located on one side of the first opening 15, the first opening 15 is arranged opposite to the lamp bead area (or the lampshade of the lamp bead area) of the lamp board 60, and the lamp board 60 is electrically connected to the control board 40; the second opening 14 is arranged opposite to the touch area of ​​the lamp board 60; a transparent lampshade 11 can be formed by injection molding on one side of the upper cover 10 away from the lamp board 60, the transparent lampshade 11 covers the first opening 15 and seals the first opening 15, and the area of ​​the transparent lampshade 11 opposite to the first opening 15 can be used as a display area for battery pack information, which is used to display voltage information, current information, temperature information, remaining power information, and Bluetooth status of the battery pack. status information, other alarm information, etc.; the transparent lampshade 11 also extends to cover the edge of the second opening 14, and a third opening 111 is formed on the transparent lampshade 11 to be aligned with the second opening 14 to avoid the soft glue button 12; a soft glue button 12 is formed by injection molding on one side of the upper cover 10 close to the light board 60, and the soft glue button 12 is arranged at the second opening 14 and extends to cover the edge of the first opening 15. The pressing portion of the soft glue button 12 can be exposed through the second opening 14 and the third opening 111, which is convenient for user operation. The pressing portion of the soft glue button 12 contacts the touch area of ​​the light board 60. By pressing the pressing portion of the soft glue button 12, the corresponding information of the battery pack can be displayed on the transparent lampshade 11.

[0042] In addition, in order not to affect the display of the transparent lampshade 11 , a fourth opening 121 aligned with the first opening 15 is formed on the soft rubber button 12 .

[0043] Specifically, the transparent lampshade 11 covering the first opening 15 can be formed on the upper cover 10 by injection molding, and then the upper cover 10 and the transparent lampshade 11 are placed in the mold of the soft glue button 12 to form the soft glue button 12 covering the second opening 14 by injection molding, so that the battery pack upper cover 10 and the transparent lampshade 11 and the soft glue button 12 form an integral body without gaps, thereby achieving a good waterproof effect. It is understandable that in other embodiments, the transparent lampshade 11 and the soft glue button 12 can also be formed on the upper cover 10 by other methods.

[0044] See also Figure 1 and Figure 2 At least one protrusion 13 may be provided on the upper cover 10. The protrusion 13 may be in a shape similar to a handle so that the user can grasp the battery pack through the protrusion 13. When there is only one protrusion 13, the protrusion 13 may be provided on any end of the upper cover 10. When there are multiple protrusions 13, the multiple protrusions 13 may be symmetrically provided at both ends of the upper cover 10. The design of the protrusion 13 facilitates the user to grasp the battery pack to prevent slipping.

[0045] See also Figure 6 The bottom of the lower shell 20 is also provided with a water leakage hole 21 to release water stains or moisture. This design helps prevent moisture from accumulating inside the battery pack, thereby protecting the battery and related electronic components from moisture and moisture. This is especially important in devices used outdoors or that may be exposed to a humid environment, and can effectively extend the service life of the battery pack and improve its stability and reliability.

[0046] See also Figure 1-Figure 6 The battery pack frame 50 is generally a rectangular frame with an opening on one side, the opening is opposite to one side wall of the housing, and the interior thereof serves as a second accommodating cavity for accommodating and installing the battery pack 30 and the control board 40. In order to reduce the overall weight of the battery pack and the electrical insulation requirements, the battery pack frame 50 can be a nylon frame or a PVC frame with an opening on one side.

[0047] See also Figure 3 The battery pack 30 is formed by stacking a plurality of battery cells, which are isolated by foam and connected in series by welding the tabs. After the series connection, a positive power interface (total positive terminal) and a negative power interface (total negative terminal) are formed. An independent positive power interface welding point and an independent negative power interface welding point are configured on the control board 40 for carrying the positive power interface (total positive terminal) and the negative power interface (total negative terminal) formed after the plurality of battery cells are connected in series; the control board 40 is also configured with a plurality of collection welding points, each of which is welded to a battery cell.

[0048] The control board 40 integrates the main board and the power board, and is installed on one side of the battery pack 30. As a battery management system (BMS), it is used to collect voltage information, current information, temperature information, and remaining power information of each battery cell, realize Bluetooth and data communication, charging switch control, and drive of the light board 60, and realize discharge, charging control, short circuit protection, etc. The integrated design, compared with the solution of separately setting the main board and the power board, can not only save a circuit board and reduce the difficulty of installation, but also simplify the glue filling process. The main board, power board, and battery pack 30 can be packaged together through only one glue filling process.

[0049] The battery pack 30 and the control board 40 are welded to form a combination and then placed in the second accommodation cavity of the battery pack frame 50, and then the conductive bar assembly 41 and the terminal assembly 70 are installed at the lower end of the battery pack frame 50, and the conductive bar assembly 41 is used to realize the electrical connection between the terminal assembly 70 and the ports of the control board 40, and the terminal assembly 70 and the conductive bar assembly 41, and the conductive bar assembly 41 and the control board 40 can be electrically connected by laser welding, soldering, bolts, etc., and then glue is poured and packaged to fill and package the battery pack 30 and the control board 40 in the second accommodation cavity between the battery pack 30 to form a whole. This design can effectively improve the waterproof, dustproof and explosion-proof functions of the battery pack, and improve the safety performance of the battery pack. The battery pack frame 50 is used to isolate the battery pack 30 from the shell, and the glue filling space is limited to the range defined by the second accommodation cavity, and glue is not poured between the upper cover 10 and the battery pack bracket 50, and between the battery pack bracket 50 and the lower shell 20, so that the glue filling space can be reduced, thereby reducing the weight of the battery pack product and improving the energy density ratio of the battery pack.

[0050] See also Figure 3 As shown, the battery pack 30 bracket also has an upper bearing portion located at the upper end and a lower bearing portion located at the lower end. The upper bearing portion is used to install the light board 60, and the light board 60 can be installed on the upper bearing portion by bolts or snaps; the lower bearing surface is used to install the terminal assembly 70 and the conductive bar assembly 41, and the terminal assembly 70 and the conductive bar assembly 41 can be installed on the lower bearing portion by bolts or snaps, that is, the terminal assembly 70 and the conductive bar assembly 41 are installed at the lower end of the battery pack frame 50, and the terminal assembly 70 is electrically connected to the control board 40 through the conductive bar assembly 41.

[0051] Specifically, the conductive bar assembly 41 includes a plurality of conductive bars connected by a high-temperature insulating adhesive 415, and the terminal assembly 70 includes a plurality of connecting terminals. The connecting terminals are electrically connected to the plurality of ports of the control board 40 through the conductive bars, and the connecting terminals and the conductive bars can be connected by laser welding, soldering, or bolts. Connecting a plurality of conductive bars into a whole by means of high-temperature insulating adhesive 415 not only facilitates installation, but also provides a good insulation effect. Conductive bars include copper bars, aluminum bars, copper-clad aluminum bars, and the like, such as copper bars. On the one hand, the design of the conductive bars allows large currents to pass through, and on the other hand, as a good conductor of heat, the conductive bars expand the heat dissipation area and increase the heat dissipation effect of the battery pack, thereby effectively reducing the temperature of the battery pack during charging and discharging, allowing the energy of the battery pack to be fully released and achieving full energy utilization.

[0052] See also Figure 3 , Figure 5 and Figure 6 The terminal assembly 70 includes a terminal seat and a plurality of connection terminals. The terminal assembly is mounted on the lower bearing portion of the battery pack 30 bracket through the terminal seat. The plurality of connection terminals are mounted on the terminal seat. A plurality of opening channels may be provided on the bottom of the lower shell 20, and each opening channel matches a connection terminal. In order to prevent external water from penetrating into the lower shell 20 and causing a short circuit, a waterproof pad 80 may be provided between the terminal seat of the terminal assembly 70 and the lower bearing portion of the battery pack frame 50.

[0053] See also Figure 3 A plurality of heat insulating sheets 90 are arranged between the waterproof pad 80 and the battery pack frame 50. The heat insulating sheets 90 are opposite to the connection terminals of the terminal assembly 70. The heat insulating sheets 90 can prevent the connection terminals from heating up during the battery pack charging and discharging process and transferring heat to the battery pack 30, thereby affecting the safety of the battery pack. As an example, the heat insulating sheets 90 can be mica sheets.

[0054] Specifically, the terminal assembly 70 includes four connecting terminals, namely, a positive output terminal 71, a charging terminal 72, a communication terminal 73 and a negative output terminal 74. The positive output terminal 71, the charging terminal 72, the communication terminal 73 and the negative output terminal 74 are arranged at intervals and installed in the terminal seat; correspondingly, the conductive bar assembly includes four conductive bars, namely, a first conductive bar 411, a second conductive bar 412, a third conductive bar 413 and a fourth conductive bar 414. The positive output terminal 71 is connected to the positive output port of the control board 40 through the first conductive bar 411, the charging terminal 72 is connected to the charging port of the control board 40 through the second conductive bar 412, the communication terminal 73 is connected to the communication port of the control board 40 through the fourth conductive bar 412, and the negative output terminal 74 is connected to the negative output port of the control board 40 through the fourth conductive bar 414, that is, each connecting terminal is connected to a port of the control board 40 through a conductive bar. And for safety considerations, the first conductive bar 411 between the positive output terminal 71 and the control board 40 is designed in segments, including two segments, which are connected by a fuse 42, and the fuse 42 can be connected to the two segments by welding or bolts.

[0055] The terminal seat is also provided with three guide positioning grooves 75 for guiding and positioning, wherein the guide positioning groove 75 on one side is located between the positive output terminal 71 and the charging terminal 72, the middle guide positioning groove 75 is located between the charging terminal 72 and the communication terminal 73, and the guide positioning groove 75 on the other side is located between the communication terminal 73 and the negative output terminal 74. The center distance d3 between the positive output terminal 71 and the negative output terminal 74 is between 34mm-38mm, such as 34mm, 35mm, 36mm, 37mm, 38mm, the center distance d2 between the guide positioning grooves 75 on both sides is between 22mm-26mm, such as 22mm, 23mm, 24mm, 25mm, 26mm, and the center distance d1 between the communication terminal 73 and the charging terminal 72 is between 10mm-14mm, such as 10mm, 11mm, 12mm, 13mm, 14mm.

[0056] The battery pack design of the present application can output a current of more than 60A for a battery pack including a battery group 30 with 15 strings and 20 strings of battery cells.

[0057] For a battery pack including a battery group 30 having 20 strings of lithium-ion battery cells, with reference to the nominal voltage of a lithium-ion single cell of 3.6V, the weight energy density (energy-to-weight ratio) of the battery pack including 20 strings of battery cells may be greater than or equal to 169Wh / kg and less than or equal to 250Wh / k, such as 169Wh / kg, 170Wh / kg, 180Wh / kg, 190Wh / kg, 200Wh / kg, 210Wh / kg, 220Wh / kg, 230Wh / kg, 240Wh / kg, 250Wh / kg; the volume energy density (energy-to-volume ratio) may be greater than or equal to 170Wh / cm 3 , and less than or equal to 290Wh / cm 3 , for example 170Wh / cm 3 、180Wh / cm 3 、190Wh / cm 3 、200Wh / cm 3 、210Wh / cm 3 、220Wh / cm 3 、230Wh / cm 3 、240Wh / cm 3 、250Wh / cm 3 、260Wh / cm 3 、270Wh / cm 3 、280Wh / cm 3 、290Wh / cm 3 .

[0058] The following are several sets of measured data for the battery pack of 20 lithium-ion battery cells. Taking the nominal voltage of a lithium-ion single cell of 3.6V as a reference, the energy-to-weight ratio of the 82V4AH battery pack is 169.5Wh / Kg, the energy-to-weight ratio of the 82V5.4AH battery pack is 180.8Wh / Kg; the energy-to-weight ratio of the 82V7AH battery pack is 192Wh / Kg; the energy-to-volume ratio of the 82V4AH battery pack is 170Wh / cm 3 , the energy volume ratio of the 82V5.4AH battery pack is 229Wh / cm 3 The energy volume ratio of the 82V7AH battery pack is 254Wh / cm 3 Taking the nominal voltage of a lithium-ion single cell as a reference, the energy-to-weight ratio of an 82V4AH battery pack is 173.7Wh / Kg, the energy-to-weight ratio of an 82V5.4AH battery pack is 185.4Wh / Kg; the energy-to-weight ratio of an 82V7AH battery pack is 196.8Wh / Kg; the energy-to-volume ratio of an 82V4AH battery pack is 174.5Wh / cm 3 The energy volume ratio of the 82V5.4AH battery pack is 235.5Wh / cm 3The energy volume ratio of the 82V7AH battery pack is 261.1Wh / cm 3 Although the cell density is further improved, the energy-to-weight ratio and energy-to-volume ratio of battery packs of different specifications can be further improved.

[0059] The above description of the embodiment shown in the present application (including the content in the abstract of the specification) is not intended to be exhaustive or to limit the present application to the precise form disclosed herein. Although the specific embodiment of the present application and the example of the present application are described herein for the purpose of illustration only, as will be recognized and understood by those skilled in the art, various equivalent modifications are possible within the spirit and scope of the present application. As noted, these modifications can be made to the present application according to the above description of the embodiment of the present application, and these modifications will be within the spirit and scope of the present application.

[0060] This paper has generally described systems and methods as details that are helpful for understanding the application. In addition, various specific details have been given to provide an overall understanding of the embodiments of the application. However, those skilled in the relevant art will recognize that the embodiments of the application can be put into practice without one or more specific details, or put into practice using other devices, systems, accessories, methods, assemblies, materials, parts, etc. In other cases, known structures, materials and / or operations are not particularly shown or described in detail to avoid confusion in various aspects of the embodiments of the application.

[0061] Thus, although the present application has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the above disclosure, and it should be understood that in some cases, some features of the present application will be adopted without corresponding use of other features without departing from the scope and spirit of the proposed application. Therefore, many modifications may be made to adapt specific environments or materials to the substantial scope and spirit of the present application. The present application is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode for carrying out the present application, but the present application will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the present application will be determined solely by the appended claims.

Claims

1. A battery pack, characterized in that: include: The housing has a first accommodating cavity; A battery pack frame is disposed in the first accommodating cavity, and the battery pack frame has a second accommodating cavity; as well as A battery pack, wherein the battery pack comprises a control board, wherein the control board is mounted on one side of the battery pack and is electrically connected to the battery pack, and the battery pack and the control board are encapsulated in the second accommodating cavity.

2. The battery pack according to claim 1, characterized in that: It also includes a light board, which is installed on the upper end of the battery pack frame and is electrically connected to the control board.

3. The battery pack according to claim 2, characterized in that: The housing includes an upper cover and a lower shell, and the lower shell and the upper cover form the first accommodating cavity.

4. The battery pack according to claim 3, characterized in that: The upper cover is provided with a first opening, and the first opening is arranged opposite to the lamp bead area of ​​the lamp board; a transparent lampshade is provided on a side of the upper cover away from the lamp board, and the transparent lampshade seals the first opening.

5. The battery pack according to claim 3, characterized in that: The upper cover is provided with a second opening, the second opening is arranged opposite to the touch area of ​​the light board, a button is arranged in the second opening, and the button contacts the touch area of ​​the light board.

6. The battery pack according to claim 1, characterized in that: It also includes a terminal assembly and a conductive bar assembly, wherein the terminal assembly and the conductive bar assembly are installed at the lower end of the battery pack frame, and the terminal assembly is electrically connected to the control board through the conductive bar assembly.

7. The battery pack according to claim 6, characterized in that: A waterproof pad is also included, and the waterproof pad is arranged between the terminal assembly and the battery pack frame.

8. The battery pack according to claim 7, characterized in that: It also includes a heat insulation sheet, which is arranged between the waterproof pad and the battery pack frame.

9. The battery pack according to claim 6, characterized in that: The conductive bar assembly includes a plurality of conductive bars, and the terminal assembly includes a plurality of connecting terminals, wherein the connecting terminals are connected to a plurality of ports of the control board through the conductive bars.

10. The battery pack according to claim 6, characterized in that: The terminal assembly includes a positive output terminal, a charging terminal, a communication terminal and a negative output terminal arranged at intervals. The center distance between the positive output terminal and the negative output terminal is between 34mm-38mm, and the center distance between the communication terminal and the charging terminal is between 10mm-14mm.

11. The battery pack according to claim 1, characterized in that: The battery pack frame includes a nylon frame or a PVC frame with one side opened.

12. The battery pack according to claim 1, characterized in that: The energy density of the battery pack is greater than or equal to 170Wh / cm 3 , less than or equal to 290Wh / cm 3 .

13. The battery pack according to claim 1, characterized in that: The energy density of the battery pack is greater than or equal to 169Wh / kg and less than or equal to 250Wh / kg.

14. The battery pack according to claim 1, characterized in that: The battery pack is a soft pack battery.

15. An electric tool, characterized in that: Includes tool and battery pack; The battery pack comprises: The housing has a first accommodating cavity; A battery pack frame is disposed in the first accommodating cavity, and the battery pack frame has a second accommodating cavity; and A battery pack, wherein the battery pack comprises a control board, wherein the control board is mounted on one side of the battery pack and is electrically connected to the battery pack, and the battery pack and the control board are encapsulated in the second accommodating cavity.

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