Battery pack structure

Abstract

The present invention provides a battery pack structure comprising a battery cell, a frame, a first circuit board, and a second circuit board sequentially connected and arranged along the radial direction of the battery cell; the frame extending along the axial length of the battery cell and comprising: a first mounting portion for positioning, mounting, and connecting the battery cell, the first mounting portion being provided on a side of the frame facing the battery cell and extending and protruding along the radial direction of the battery cell; a second mounting portion for positioning, mounting, and connecting the first circuit board, the second mounting portion being provided on a side of the frame facing the first circuit board; a third mounting portion extending and protruding along the axial length of the battery cell and used for positioning, mounting, and connecting the second circuit board; the second circuit board being communicatively connected to the first circuit board. The internal arrangement structure of the battery pack structure of the present invention is novel.

Description

[0001] This invention claims priority to the patent application filed with the State Intellectual Property Office of the People's Republic of China on December 10, 2020, with application number CN2020229613940 and invention name "Battery Pack Structure", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of batteries, and in particular to a battery pack structure. Background Art

[0003] To increase the versatility of power tools and expand their working range beyond the constraints of socket locations, many cordless power tools have emerged on the market. Cordless power tools offer portability, ease of operation, and diverse functionality. They significantly reduce labor intensity, improve efficiency, and mechanize manual operations. Consequently, they are widely used in construction, home renovation, automotive, machinery, electricity, bridge construction, gardening, and other fields. The battery packs used as power sources for cordless power tools have diverse internal structural arrangements. Summary of the Invention

[0004] The object of the present invention is to provide a battery pack structure with a novel internal arrangement structure.

[0005] Specifically, the present invention is achieved through the following technical solutions:

[0006] According to a first aspect of an embodiment of the present invention, a battery pack structure is provided, including:

[0007] The battery cell, the frame, the first circuit board, and the second circuit board are sequentially connected along the radial direction of the battery cell;

[0008] The skeleton extends along the longitudinal direction of the axis of the battery cell and includes:

[0009] a first mounting portion, used for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along the radial direction of the battery cell;

[0010] a second mounting portion, used for positioning, mounting and connecting the first circuit board, the second mounting portion being provided on a side of the frame facing the first circuit board;

[0011] a third mounting portion extending and protruding along the longitudinal direction of the axis of the battery cell, and used for positioning, mounting and connecting the second circuit board;

[0012] The second circuit board is communicatively connected to the first circuit board.

[0013] Optionally, the first mounting parts include two, the two first mounting parts are respectively located at the two ends of the battery cell, each first mounting part is in contact with the corresponding end of the battery cell, and each first mounting part at least partially covers the corresponding end of the battery cell, so that the battery cell is clamped and fixed between the two first mounting parts.

[0014] Optionally, the second mounting parts include two, and the two second mounting parts are respectively located at two opposite edges of the first circuit board. Each second mounting part supports and limits the corresponding edge of the first circuit board so that the first circuit board is spaced apart from the main body of the skeleton.

[0015] Optionally, the two first mounting portions are oppositely arranged on two sides of the main body of the skeleton, and the two second mounting portions are oppositely arranged on the other two sides of the main body of the skeleton.

[0016] Optionally, the third mounting portion is arranged on a side of the first mounting portion away from the battery cell and is located at an outer edge of the first mounting portion, the second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board.

[0017] Optionally, the outer edge of the first mounting portion is arc-shaped, a limiting portion is provided on a side of one of the first mounting portions away from the battery core, the limiting portion extends along the outer edge of the one of the first mounting portions, and both ends of the limiting portion are arranged toward the main body of the frame, and the third mounting portion is located at the outer edge of the limiting portion;

[0018] The second circuit board is accommodated in a receiving space formed by the limiting portion and one of the first mounting portions, and the second circuit board is adapted to the receiving space.

[0019] Optionally, the third mounting portion is integrally formed on an outer edge of the first mounting portion.

[0020] Optionally, the third mounting portion includes a plurality of third mounting portions, the plurality of third mounting portions are arranged at intervals along the outer edge of the first mounting portion, and the second circuit board is clamped and fixed between the plurality of third mounting portions.

[0021] Optionally, the battery pack structure further includes a temperature sensor for detecting the temperature of the battery cell, and the temperature sensor is electrically connected to the first circuit board;

[0022] The skeleton further includes a shielding portion, which extends and protrudes along the radial direction of the battery core and is located on one side of the outer wall of the battery core. The temperature sensor is sandwiched between the shielding portion and the outer wall of the battery core.

[0023] Optionally, the battery pack structure further includes a signal transmission line, one end of the signal transmission line is connected to the temperature sensor, and the other end is connected to a side of the first circuit board facing the frame;

[0024] The frame is further provided with a positioning portion, which is located between the shielding portion and a position on the frame for connecting the signal transmission line. A portion of the signal transmission line is attached to a surface of the positioning portion facing the battery cell.

[0025] Optionally, the first circuit board is a main control board of the battery pack structure, and the second circuit board is a sub-board.

[0026] Compared with the prior art, the beneficial technical effects of the present invention are:

[0027] This technical solution connects the battery cell, the skeleton, and the first circuit board in sequence along the radial direction of the battery cell, and the skeleton extends along the axial length direction of the battery cell. The skeleton extends along the radial direction of the battery cell and the axial length direction of the battery cell to respectively protrude a first mounting portion and a third mounting portion, which are respectively used to position the battery cell and the second circuit board. A second mounting portion for positioning and mounting the first circuit board is provided on the side of the skeleton facing the first circuit board, and the second circuit board is kept in communication connection with the first circuit board. The structural arrangement is novel and concise.

[0028] According to a second aspect of an embodiment of the present invention, a battery pack structure is provided, including:

[0029] case;

[0030] A battery cell, a frame, a first circuit board, and a second circuit board are located in the housing and are sequentially connected along the radial direction of the battery cell;

[0031] The frame extends and protrudes along the longitudinal direction of the axis of the battery core to form a third mounting portion;

[0032] The third mounting portion is used for positioning, mounting and connecting the second circuit board;

[0033] The second circuit board is communicatively connected to the first circuit board, and the second circuit board includes at least one wake-up switch;

[0034] The housing includes an end cover corresponding to the second circuit board. A button is arranged at a position of the end cover corresponding to the wake-up switch. A protrusion suitable for contacting the wake-up switch is provided on an inner side of the button.

[0035] Optionally, the button is suitable for elastic deformation, and / or the outer surface of the button is substantially flush with the outer surface of the end cover.

[0036] Optionally, the frame further includes a first mounting portion for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along a radial direction of the battery cell;

[0037] The first mounting parts include two, and the two first mounting parts are respectively located at the two ends of the battery cell, each first mounting part is in contact with the corresponding end of the battery cell, and each first mounting part at least partially covers the corresponding end of the battery cell, so that the battery cell is clamped and fixed between the two first mounting parts.

[0038] Optionally, the frame further includes a second mounting portion for positioning, mounting and connecting the first circuit board, and the second mounting portion is provided on a side of the frame facing the first circuit board;

[0039] The second mounting parts include two, and the two second mounting parts are respectively located at two opposite edges of the first circuit board. Each second mounting part supports and limits the corresponding edge of the first circuit board so that the first circuit board is spaced apart from the main body of the skeleton.

[0040] Optionally, the third mounting portion is arranged on a side of the first mounting portion away from the battery cell and is located at an outer edge of the first mounting portion, the second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board.

[0041] Compared with the prior art, the beneficial technical effects of the present invention are:

[0042] This technical solution is equipped with a second circuit board with a wake-up switch, which is arranged in the axial length direction of the battery cell, and a button is arranged at the corresponding end cover. A convex column suitable for contacting the wake-up switch is provided on the inside of the button. When the user operates it, four fingers tightly grasp the length direction surface of the battery pack, which is easy to hold, and the thumb just corresponds to the button, which is convenient for pressing.

[0043] According to a third aspect of an embodiment of the present invention, a battery pack structure is provided, including:

[0044] The battery cell, the frame and the first circuit board are sequentially connected along the radial direction of the battery cell;

[0045] The skeleton extends along the longitudinal direction of the axis of the battery cell and includes:

[0046] a first mounting portion, used for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along the radial direction of the battery cell;

[0047] A second mounting portion, for positioning, mounting and connecting the first circuit board, the second mounting portion being provided on a side of the frame facing the first circuit board; an arcuate groove extending along the longitudinal axis of the battery cell is provided on a side of the frame facing the battery cell, the arcuate groove being adapted to the arcuate surface of the battery cell;

[0048] The first mounting portion limits the battery core in the axial length direction of the battery core, and the arc-shaped groove limits the battery core in the radial direction of the battery core.

[0049] Optionally, the width of the arc-shaped groove is smaller than the outer diameter of the battery core.

[0050] Compared with the prior art, the beneficial technical effects of the present invention are:

[0051] This technical solution connects the battery cell, the skeleton and the first circuit board in sequence along the radial direction of the battery cell, and the skeleton extends and protrudes in the radial direction of the battery cell, that is, perpendicular to the axial length direction of the battery cell, to form a first mounting portion, and the skeleton is provided with an arc groove extending along the axial length direction of the battery cell on the side facing the battery cell, and the arc groove is adapted to the arc surface of the battery cell. The first mounting portion limits the battery cell in the axial length direction of the battery cell, and the arc groove is used to limit the battery cell in the radial direction at the same time, and the battery cell is stably limited by the skeleton.

[0052] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 is a schematic diagram of a battery pack structure according to an exemplary embodiment of the present invention;

[0055] Figure 2 is an exploded view of a battery pack structure shown in an exemplary embodiment of the present invention;

[0056] Figure 3 is a partial structural exploded diagram of a battery pack structure according to an exemplary embodiment of the present invention;

[0057] Figure 4 is a cross-sectional view of a battery pack structure shown in an exemplary embodiment of the present invention;

[0058] Figure 5 FIG. 1 is an exploded view of a battery pack structure from another perspective, showing an exemplary embodiment of the present invention. FIG. DETAILED DESCRIPTION

[0059] 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.

[0060] See also Figure 1 and Figure 2 A battery pack structure 100 includes a battery cell 20, a skeleton 30, a first circuit board 40a and a second circuit board 40b, wherein the battery cell 20, the skeleton 30 and the first circuit board 40a are connected in sequence along the radial direction of the battery cell 20.

[0061] In the embodiment of the present invention, the skeleton 30 extends along the longitudinal direction of the axis of the battery cell 20 , and the skeleton 30 may include a first mounting portion 30 a , a second mounting portion 30 b , and a third mounting portion 30 c .

[0062] The first mounting portion 30a is provided on the side of the frame 30 facing the battery cell 20, and the first mounting portion 30a extends and protrudes in the radial direction of the battery cell 20. In this embodiment, the first mounting portion 30a is used to position, install and connect the battery cell 20. The second mounting portion 30b is provided on the side of the frame 30 facing the first circuit board 40a, and the second mounting portion 30b is used to position, install and connect the first circuit board 40a.

[0063] The third mounting portion 30 c extends and protrudes along the longitudinal direction of the battery cell 20 . The third mounting portion 30 c of this embodiment is used to position, mount and connect the second circuit board 40 b .

[0064] In this embodiment, the second circuit board 40b is communicatively connected to the first circuit board 40a.

[0065] Optionally, the first circuit board 40a is the main control board of the battery pack structure 100, which has functions such as BMS management, and the second circuit board 40b is a sub-board, which can be configured with a wake-up switch and / or lamp beads, as well as other electronic components.

[0066] This technical solution connects the battery cell, the skeleton, and the first circuit board in sequence along the radial direction of the battery cell, and the skeleton extends along the axial length direction of the battery cell. The skeleton extends along the radial direction of the battery cell and the axial length direction of the battery cell to respectively protrude a first mounting portion and a third mounting portion, which are respectively used to position the battery cell and the second circuit board, and a second mounting portion for positioning and mounting the first circuit board is provided on the side of the skeleton facing the first circuit board, and the second circuit board is kept in communication connection with the first circuit board. The structural arrangement of the battery pack structure is novel and concise.

[0067] Specifically, if Figure 2 and Figure 3 As shown, the first mounting portion 30a includes two, two first mounting portions 30a, respectively located at the two ends of the battery cell 20 (i.e., the positive and negative poles of the battery cell 20), each first mounting portion 30a contacts the corresponding end of the battery cell 20, and each first mounting portion 30a at least partially covers the corresponding end of the battery cell 20, so that the battery cell 20 is clamped and fixed between the two first mounting portions 30a. The above-mentioned first mounting portions 30a are correspondingly distributed at both ends of the long axis direction of the battery cell 20, and the spacing between the two first mounting portions 30a is suitable for just matching the axial length of the battery cell 20, and the first mounting portions 30a at both ends are used to achieve the limitation of the long axis direction of the battery cell 20. Optionally, the height of the first mounting portion 30a in the radial direction of the battery cell 20 corresponds to the height of the radial end face of the battery cell 20.

[0068] See again Figure 2 and Figure 3 The second mounting portion 30b includes two second mounting portions 30b, which are respectively located at two opposite edges of the first circuit board 40a. Each second mounting portion 30b supports and limits the corresponding edge of the first circuit board 40a, so that the first circuit board 40a is spaced apart from the main body of the skeleton 30.

[0069] Optionally, the second mounting portion 30b adopts a locking structure, so that the first circuit board 40a is directly fixed to the frame 30. A mounting position for the first circuit board 40a is configured on the frame 30. After the first circuit board 40a matches the mounting position, it is fixed to the frame 30 by the protruding second mounting portion 30b.

[0070] See again Figure 2 and Figure 3 The two first mounting portions 30a are relatively arranged on two sides of the main body of the skeleton 30, and the two second mounting portions 30b are relatively arranged on the other two sides of the main body of the skeleton 30, thereby limiting and fixing the battery cell 20 and the first circuit board 40a in different directions.

[0071] As described above, the battery cell 20 is limited by the skeleton 30. In addition, the positive and negative ends of the battery cell 20 are connected to the first circuit board 40a through the first electrical connector 50 and the second electrical connector 60. The first electrical connector 50 and the second electrical connector 60 are respectively fixedly connected to the battery cell 20 and the first circuit board 40a at both ends. For example, a welding connection method can be used to achieve the limited fixation of the battery cell 20 and the skeleton 30.

[0072] The above-mentioned battery cell 20 can be a 21700 battery cell or a 18650 battery cell. The first electrical connector 50 and the second electrical connector 60 are made of conductive material, such as nickel sheet. The first electrical connector 50 and the second electrical connector 60 can be fixed by spot welding at the positive and negative pole connections of the corresponding battery cells.

[0073] The first electrical connector 50 and the second electrical connector 60 serve as electrical connections on one hand, and also serve as position limiting and fixing functions on the other hand.

[0074] Please continue to see Figure 2 and Figure 3 The first electrical connector 50 and the second electrical connector 60 extend toward each other along the axial length direction of the battery core 20 .

[0075] The battery cell 20 is positioned in the frame 30. The frame 30 is provided with connection openings O1 and O2 corresponding to the electrodes at both ends of the battery cell 20. The starting ends of the first electrical connector 50 and the second electrical connector 60 correspond to the connection openings O1 and O2 respectively and are electrically connected to the electrodes at both ends of the battery cell 20. Specifically, the first electrical connector 50 and the second electrical connector 60 are made of metal nickel sheets, which are spot-welded to the electrodes at both ends of the battery cell 20. The spot-welded connection parts are as shown in FIG. Figure 3 As shown in the mid-point weld section 50a.

[0076] Then, the first electrical connector 50 and the second electrical connector 60 extend and protrude along the outward lateral direction e, and are bent, and then attached to the outer surface of the frame 30 and extend toward the first circuit board 40a and are connected thereto. The first electrical connector 50 and the second electrical connector 60 extend and protrude along the outward lateral direction e, and are bent to form a laterally extending bent section 50b, as shown in FIG. Figure 3 Shown in area A.

[0077] The above structural design makes the first electrical connector 50 and the second electrical connector 60 spaced apart from the surface of the battery cell. The first electrical connector 50 and the second electrical connector 60 are connected to the electrodes of the battery cell 20 and are obviously made of conductive materials. In this technical solution, the support frame 40 is made of insulating material. Therefore, the conductive first electrical connector 50 and the second electrical connector 60 are separated from the surface of the battery cell 20 by insulating material. Therefore, even if the surface of the battery cell 20 is damaged, a short circuit accident will not occur, thereby playing a role of safety insulation protection.

[0078] In addition, this battery pack structure 100 can be applied to power tools, and the use of power tools often involves large vibrations. Therefore, the first electrical connector 50 and the second electrical connector 60 respectively extend and protrude along the outward lateral direction e, and bend to form a lateral extension bending section, which can also effectively attenuate vibrations and avoid the influence of large vibrations involved in the use of power tools on the internal structure.

[0079] See also Figure 1 and Figure 2 The third mounting portion 30c is located on the side of the first mounting portion 30a away from the battery cell 20, and is located at the outer edge of the first mounting portion 30a. This design facilitates the assembly and positioning of the second circuit board 40b. In this embodiment, the second circuit board 40b is located on the side of one of the first mounting portions 30a away from the battery cell 20, and the third mounting portion 30c supports and positions the edge of the second circuit board 40b.

[0080] Optionally, the third mounting portion 30c adopts a locking structure.

[0081] See again Figure 1 and Figure 2 , the outer edge of the first mounting portion 30a may be arc-shaped.

[0082] See also Figure 2 A stopper 30a-1 is provided on one of the first mounting portions 30a, away from the battery cell 20. The stopper 30a-1 extends along the outer edge of the first mounting portion 30a, with both ends of the stopper 30a-1 facing the body of the frame 30. The third mounting portion 30c is located at the outer edge of the stopper 30a-1. In this embodiment, the second circuit board 40b is accommodated within the accommodation space formed by the stopper 30a-1 and one of the first mounting portions, and the second circuit board 40b is adapted to fit within the accommodation space. This design allows for better positioning of the second circuit board 40b and a more compact structure.

[0083] Optionally, the third mounting portion 30c is integrally formed on the outer edge of the first mounting portion 30a. The third mounting portion 30c has a high structural strength and is not easily damaged.

[0084] The third mounting portion 30c of this embodiment may include multiple, such as Figure 1 and Figure 2 As shown, the third mounting portions 30c include three, multiple third mounting portions 30c are spaced apart along the outer edge of the first mounting portion 30a, and the second circuit board 40b is sandwiched and fixed between the multiple third mounting portions 30c. By providing multiple third mounting portions 30c, the second circuit board 40b is stably positioned.

[0085] See also Figure 1 、 Figure 2 and Figure 3 The battery pack structure 100 also includes a temperature sensor 70 for detecting the temperature of the battery cell 20. The temperature sensor 70 is electrically connected to the first circuit board 40a. Thus, the first circuit board 40a can obtain the temperature of the battery cell 20 from the temperature sensor 70. The frame 30 also includes a shielding portion 30e located on one side of the outer wall of the battery cell 20. The temperature sensor 70 is sandwiched between the shielding portion 30e and the outer wall of the battery cell 20. This design not only rationally utilizes the internal space of the battery pack structure 100, but also effectively protects the temperature sensor 70 through the shielding portion and stabilizes the temperature sensor 70.

[0086] Optionally, the temperature sensor 70 is cylindrical; of course, in other embodiments, the temperature sensor 70 may also be in other shapes.

[0087] Optionally, the shielding portion 30e is a protrusion; in some other embodiments, the shielding portion 30e may also have other structures. The battery pack structure 100 may also include a signal transmission line 80, one end of the signal transmission line 80 is connected to the temperature sensor 70, and the other end is connected to the side of the first circuit board 40a facing the skeleton 30. In this embodiment, the skeleton 30 is also provided with a positioning portion 30f, and the positioning portion 30f is located between the shielding portion 30e and the position on the skeleton 30 for connecting the signal transmission line 80. A portion of the signal transmission line 80 is attached to the surface of the positioning portion 30f facing the battery cell 20. The positioning portion 30f limits the signal transmission line 80, making the arrangement of the signal transmission line 80 more beautiful.

[0088] See also Figure 1 and Figure 2 A notch 30g is provided on one side of the main body of the skeleton 30, and the notch 30g extends along the axial length direction of the battery cell 20. The shielding portion 30e and the positioning portion 30f are arranged in the notch 30g, which further rationally utilizes the internal space of the battery pack structure 100 and is conducive to the miniaturized design of the skeleton 30.

[0089] See also Figure 4 and Figure 5 The battery pack structure 100 may include a housing 10, battery cells 20, a frame 30, and a first circuit board 40a located in the housing 10 and sequentially connected along the radial direction of the battery cells 20. The battery pack structure 100 may also include a second circuit board 40b.

[0090] The frame 30 extends and protrudes along the longitudinal direction of the battery core 20 to form a third mounting portion 30 c , and the third mounting portion 30 c is used for positioning, mounting, and connecting the second circuit board 40 b .

[0091] The second circuit board 40b is communicatively connected to the first circuit board 40a, and the third mounting portion 30c includes at least one wake-up switch 40b-1;

[0092] The housing 10 may include an end cover 10a corresponding to the second circuit board 40b. A button 10a-1 is arranged at the position of the end cover 10a corresponding to the wake-up switch 40b-1. A protrusion p suitable for contacting the wake-up switch 40b-1 is provided on the inner side of the button 10a-1.

[0093] This technical solution is equipped with a second circuit board with a wake-up switch, which is arranged in the axial length direction of the battery cell, and a button is arranged at the corresponding end cover. A convex column suitable for contacting the wake-up switch is provided on the inside of the button. When the user operates it, four fingers tightly grasp the length direction surface of the battery pack, which is convenient to hold. The thumb just corresponds to the button, which is convenient for pressing operation and easy to hold and press with one hand.

[0094] The button 10a-1 is suitable for elastic deformation, and / or the outer surface of the button 10a-1 is substantially flush with the outer surface of the end cover 10a. Figure 4 .

[0095] The above-mentioned battery pack structure 100 may also include a first mounting portion 30a, wherein the first mounting portion 30a is arranged on the side of the skeleton 30 facing the battery cell 20, and the first mounting portion 30a extends and protrudes along the radial direction of the battery cell 20. The first mounting portion 30a of this embodiment is used to position, install and connect the battery cell 20.

[0096] The first mounting portion 30a may include two first mounting portions 30a, which are respectively located at the two ends of the battery cell 20 (i.e., the positive and negative poles of the battery cell 20), each first mounting portion 30a contacts the corresponding end of the battery cell 20, and each first mounting portion 30a at least partially covers the corresponding end of the battery cell 20, so that the battery cell 20 is clamped and fixed between the two first mounting portions 30a.

[0097] The first mounting portions 30a are located at opposite ends of the battery cell 20 along its longitudinal axis. The spacing between the two first mounting portions 30a is adapted to precisely match the axial length of the battery cell 20. The first mounting portions 30a at both ends limit the longitudinal axis of the battery cell 20. Optionally, the radial height of the first mounting portions 30a corresponds to the height of the radial end surface of the battery cell 20.

[0098] The battery pack structure 100 may further include a second mounting portion 30b, which is disposed on a side of the frame 30 facing the first circuit board 40a. The second mounting portion 30b is used to position, mount, and connect the first circuit board 40a.

[0099] The second mounting portion 30b may include two, and the two second mounting portions 30b are respectively located at two opposite edges of the first circuit board 40a. Each second mounting portion 30b supports and limits the corresponding edge of the first circuit board 40a, so that the first circuit board 40a is spaced apart from the main body of the skeleton 30.

[0100] The third mounting portion 30c is located on the side of the first mounting portion 30a away from the battery cell 20, and the third mounting portion 30c is located at the outer edge of the first mounting portion 30a. This design facilitates the assembly and positioning of the second circuit board 40b. In this embodiment, the second circuit board 40b is located on the side of one of the first mounting portions 30a away from the battery cell 20, and the third mounting portion 30c supports and positions the edge of the second circuit board 40b. Figure 5 The battery pack structure 100 may include: battery cells 20 , a skeleton 30 , and a first circuit board 40 a that are sequentially connected along a radial direction of the battery cells 20 .

[0101] The skeleton 30 extends along the longitudinal axis of the battery cell 20 and may include a first mounting portion 30a and a second mounting portion 30b. The first mounting portion 30a is located on the side of the skeleton 30 facing the battery cell 20 and extends and protrudes in the radial direction of the battery cell 20. In this embodiment, the first mounting portion 30a is used to position, install, and connect the battery cell 20. The second mounting portion 30b is located on the side of the skeleton 30 facing the first circuit board 40a and is used to position, install, and connect the first circuit board 40a. The side of the skeleton 30 facing the battery cell 20 is also provided with an arcuate groove 30d extending along the longitudinal axis of the battery cell 20. The arcuate groove 30d is adapted to the arcuate surface of the battery cell 20.

[0102] In this embodiment, the first mounting portion 30a positions the battery cell 20 along its longitudinal axis, while the arcuate groove 30d positions the battery cell 20 radially. The arcuate groove 30d, in conjunction with the inner wall of the housing 10, acts as a radial retainer for the battery cell. Furthermore, the width of the arcuate groove 30d is smaller than the outer diameter of the battery cell 20, thereby minimizing the battery pack structure 100's external dimensions.

[0103] This technical solution connects the battery cell, the skeleton and the first circuit board in sequence along the radial direction of the battery cell, and the skeleton extends and protrudes in the radial direction of the battery cell, that is, perpendicular to the axial length direction of the battery cell, to form a first mounting portion, and the skeleton is provided with an arc groove extending along the axial length direction of the battery cell on the side facing the battery cell, and the arc groove is adapted to the arc surface of the battery cell. The first mounting portion limits the battery cell in the axial direction, and the arc groove is used to limit the battery cell in the radial direction at the same time, and the skeleton is used to stably limit the battery cell.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery pack structure, characterized in that: include: The battery cell, the frame and the first circuit board are sequentially connected along the radial direction of the battery cell; and a second circuit board; The skeleton extends along the longitudinal direction of the axis of the battery cell and includes: a first mounting portion, used for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along the radial direction of the battery cell; a second mounting portion, used for positioning, mounting and connecting the first circuit board, the second mounting portion being provided on a side of the frame facing the first circuit board; a third mounting portion extending and protruding along the longitudinal direction of the axis of the battery cell, and used for positioning, mounting and connecting the second circuit board; The second circuit board is communicatively connected to the first circuit board; The first mounting portions include two, the two first mounting portions are respectively located at two ends of the battery cell, each first mounting portion contacts the corresponding end of the battery cell, and each first mounting portion at least partially covers the corresponding end of the battery cell, so that the battery cell is sandwiched and fixed between the two first mounting portions; The third mounting portion is provided on a side of the first mounting portion away from the battery cell and is located at an outer edge of the first mounting portion. The second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board. The third mounting portions include a plurality of portions, and the plurality of third mounting portions are arranged at intervals along the outer edge of the first mounting portion. The second circuit board is clamped and fixed between the plurality of third mounting portions.

2. The battery pack structure according to claim 1, characterized in that: The second mounting parts include two, and the two second mounting parts are respectively located at two opposite edges of the first circuit board. Each second mounting part supports and limits the corresponding edge of the first circuit board so that the first circuit board is spaced apart from the main body of the skeleton.

3. The battery pack structure according to claim 2, characterized in that: The two first mounting portions are oppositely arranged on two sides of the main body of the frame, and the two second mounting portions are oppositely arranged on the other two sides of the main body of the frame.

4. The battery pack structure according to claim 3, characterized in that: The outer edge of the first mounting portion is arc-shaped, a limiting portion is provided on a side of one of the first mounting portions away from the battery core, the limiting portion extends along the outer edge of the one of the first mounting portions, and both ends of the limiting portion are arranged toward the main body of the frame, and the third mounting portion is located at the outer edge of the limiting portion; The second circuit board is accommodated in a receiving space formed by the limiting portion and one of the first mounting portions, and the second circuit board is adapted to the receiving space.

5. The battery pack structure according to claim 3, characterized in that: The third mounting portion is integrally formed on an outer edge of the first mounting portion.

6. The battery pack structure according to claim 1, characterized in that: The battery pack structure further includes a temperature sensor for detecting the temperature of the battery cell, wherein the temperature sensor is electrically connected to the first circuit board; The skeleton further includes a shielding portion, which is located on one side of the outer wall of the battery core, and the temperature sensor is sandwiched between the shielding portion and the outer wall of the battery core.

7. The battery pack structure according to claim 6, characterized in that: The battery pack structure further includes a signal transmission line, one end of which is connected to the temperature sensor, and the other end of which is connected to a side of the first circuit board facing the frame; The frame is further provided with a positioning portion, which is located between the shielding portion and a position on the frame for connecting the signal transmission line. A portion of the signal transmission line is attached to a surface of the positioning portion facing the battery cell.

8. The battery pack structure according to claim 1, characterized in that: The first circuit board is the main control board of the battery pack structure, and the second circuit board is the sub-board.

9. A battery pack structure, characterized in that: include: case; A battery cell, a frame and a first circuit board are located in the housing and are sequentially connected along the radial direction of the battery cell; and a second circuit board; The frame extends and protrudes along the longitudinal direction of the axis of the battery core to form a third mounting portion; The third mounting portion is used for positioning, mounting and connecting the second circuit board; The second circuit board is communicatively connected to the first circuit board, and the second circuit board includes at least one wake-up switch; The housing includes an end cover corresponding to the second circuit board, a button is arranged at the position of the end cover corresponding to the wake-up switch, and a protrusion is provided on the inner side of the button suitable for contacting the wake-up switch; The frame further includes a first mounting portion for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along the radial direction of the battery cell; The first mounting portions include two, the two first mounting portions are respectively located at two ends of the battery cell, each first mounting portion contacts the corresponding end of the battery cell, and each first mounting portion at least partially covers the corresponding end of the battery cell, so that the battery cell is sandwiched and fixed between the two first mounting portions; The third mounting portion is provided on a side of the first mounting portion away from the battery cell and is located at an outer edge of the first mounting portion. The second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board. The third mounting portions include a plurality of portions, and the plurality of third mounting portions are arranged at intervals along the outer edge of the first mounting portion. The second circuit board is clamped and fixed between the plurality of third mounting portions.

10. The battery pack structure according to claim 9, characterized in that: The button is suitable for elastic deformation, and / or the outer surface of the button is substantially flush with the outer surface of the end cover.

11. The battery pack structure according to claim 9, characterized in that: The frame further includes a second mounting portion for positioning, mounting and connecting the first circuit board, wherein the second mounting portion is provided on a side of the frame facing the first circuit board; The second mounting parts include two, and the two second mounting parts are respectively located at two opposite edges of the first circuit board. Each second mounting part supports and limits the corresponding edge of the first circuit board so that the first circuit board is spaced apart from the main body of the skeleton.

12. The battery pack structure according to claim 9, characterized in that: The third mounting portion is arranged on a side of the first mounting portion away from the battery cell and is located at the outer edge of the first mounting portion. The second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board.

13. A battery pack structure, characterized in that: include: The battery cell, the frame and the first circuit board are sequentially connected along the radial direction of the battery cell; and a second circuit board; The skeleton extends along the longitudinal direction of the axis of the battery cell and includes: a first mounting portion, used for positioning, mounting and connecting the battery cell, wherein the first mounting portion is provided on a side of the frame facing the battery cell, and the first mounting portion extends and protrudes along the radial direction of the battery cell; A second mounting portion, for positioning, mounting and connecting the first circuit board, the second mounting portion being provided on a side of the frame facing the first circuit board; an arcuate groove extending along the longitudinal axis of the battery cell is provided on a side of the frame facing the battery cell, the arcuate groove being adapted to the arcuate surface of the battery cell; The first mounting portion limits the battery cell in the axial length direction of the battery cell, and the arc-shaped groove limits the battery cell in the radial direction of the battery cell; The first mounting portions include two, the two first mounting portions are respectively located at two ends of the battery cell, each first mounting portion contacts the corresponding end of the battery cell, and each first mounting portion at least partially covers the corresponding end of the battery cell, so that the battery cell is sandwiched and fixed between the two first mounting portions; a third mounting portion extending and protruding along the longitudinal direction of the axis of the battery cell, and used for positioning, mounting and connecting the second circuit board; The third mounting portion is provided on a side of the first mounting portion away from the battery cell and is located at an outer edge of the first mounting portion. The second circuit board is located on a side of one of the first mounting portions away from the battery cell, and the third mounting portion supports and limits the edge of the second circuit board. The third mounting portions include a plurality of portions, and the plurality of third mounting portions are arranged at intervals along the outer edge of the first mounting portion. The second circuit board is clamped and fixed between the plurality of third mounting portions.

14. The battery pack structure according to claim 13, characterized in that: The width of the arc-shaped groove is smaller than the outer diameter of the battery core.

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