Battery pack structure

Abstract

The application provides a battery pack structure, comprising: an electric core, a framework and a first circuit board which are sequentially connected and arranged along the radial direction of the electric core, the framework extending along the axial length direction of the electric core; a temperature sensor for detecting the temperature of the electric core, the temperature sensor being electrically connected with the first circuit board; the framework comprising a shielding part located at one side of the outer side wall of the electric core, and the temperature sensor being clamped between the shielding part and the outer side wall of the electric core. By arranging the shielding part and clamping the temperature sensor between the shielding part and the outer side wall of the electric core, on one hand, the internal space of the battery pack structure is reasonably utilized, and on the other hand, the temperature sensor is effectively protected by the shielding part and stably positioned.

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 present invention provides a battery pack structure.

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

[0006] An embodiment of the present invention provides a battery pack structure, including:

[0007] A battery cell, a frame, and a first circuit board are sequentially connected along a radial direction of the battery cell, wherein the frame extends along an axial length direction of the battery cell;

[0008] a temperature sensor, configured to detect the temperature of the battery cell, the temperature sensor being electrically connected to the first circuit board;

[0009] The frame includes a shielding portion, the shielding portion 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.

[0010] 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;

[0011] 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.

[0012] Optionally, a notch is provided on one side of the main body of the skeleton, the notch extends along the longitudinal direction of the axis of the battery core, and the shielding portion and the positioning portion are provided in the notch.

[0013] Optionally, the shielding portion is a protrusion.

[0014] Optionally, the temperature sensor is cylindrical.

[0015] Optionally, a side of the skeleton facing the battery core is further provided with an arcuate groove extending along the longitudinal direction of the axis of the battery core, and the arcuate groove is adapted to the arcuate surface of the battery core.

[0016] Optionally, the skeleton further includes a first mounting portion for positioning, mounting and connecting the battery cell, the first mounting portion being provided on a side of the skeleton facing the battery cell, and the first mounting portion extending and protruding along a radial direction of the battery cell.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] According to the technical solution provided by the embodiments of the present invention, a shielding portion is provided to sandwich the temperature sensor between the shielding portion and the outer wall of the battery cell. This not only rationally utilizes the internal space of the battery pack structure, but also effectively protects the temperature sensor through the shielding portion and stabilizes the temperature sensor. It should be understood that the above general description and the detailed descriptions that follow are merely exemplary and explanatory and do not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 is a schematic diagram of a battery pack structure according to an exemplary embodiment of the present invention;

[0023] Figure 2 is an exploded view of a battery pack structure shown in an exemplary embodiment of the present invention;

[0024] Figure 3 is a partial structural exploded diagram of a battery pack structure according to an exemplary embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of a battery pack structure shown in an exemplary embodiment of the present invention;

[0026] 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

[0027] 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.

[0028] 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.

[0029] In the embodiment of the present invention, the skeleton 30 extends along the longitudinal direction of the axis of the battery cell 20 .

[0030] See also Figure 1 、 Figure 2 and Figure 3The battery pack structure 100 may also include 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. In this way, 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. The shielding portion 30e is 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, on the one hand, rationally utilizes the internal space of the battery pack structure 100, and on the other hand, the shielding portion effectively protects the temperature sensor 70 and stabilizes the temperature sensor 70.

[0031] Optionally, the temperature sensor 70 is cylindrical; of course, in other embodiments, the temperature sensor 70 may also be in other shapes.

[0032] Optionally, the shielding portion 30e is a protrusion; in some other embodiments, the shielding portion 30e may also be other structures.

[0033] The battery pack structure 100 may also include a signal transmission line 80, one end of which is connected to the temperature sensor 70 and the other end is connected to the side of the first circuit board 40a facing the frame 30. In this embodiment, the frame 30 is further provided with a positioning portion 30f, which is located between the shielding portion 30e and the position on the frame 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 aesthetically pleasing.

[0034] 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.

[0035] See also Figure 3 The frame 30 is provided with a first opening O1 and a second opening O2 respectively relative to the positive and negative electrodes of the battery cell 20. The battery pack structure 100 may further include a first electrical connector 50 and a second electrical connector 60.

[0036] A first electrical connector 50 is disposed at the first opening O1 and is used to connect one end of the positive and negative electrodes of the battery cell 20 to the first circuit board 40a. A second electrical connector 60 is disposed at the second opening O2 and is used to connect the other ends of the positive and negative electrodes of the battery cell 20 to the first circuit board 40a. The first and second electrical connectors 50, 60 connect the positive and negative electrodes of the battery cell 20 to the first circuit board 40a.

[0037] The frame 30 includes a first surface, which is arranged toward the first circuit board 40a. The first surface is provided with two positioning grooves (71, 72), which are respectively arranged at two ends of the frame along the axial length direction of the battery cell.

[0038] The first electrical connector 50 and the second electrical connector 60 are respectively connected to the two ends of the battery cell at the first opening O1 and the second opening O2, and the first electrical connector 50 and the second electrical connector 60 are respectively bent and extended toward the first surface to form bent extension sections (50c, 60c), each bent extension section is positioned in the positioning groove (71, 72) at the corresponding end, specifically, the bent extension section 50c is positioned in the positioning groove 71, and the bent extension section 60c is positioned in the positioning groove 72.

[0039] Each bent extension section (50c, 60c) is provided with an electrical plug-in portion (50d, 60d) at one end away from the corresponding opening (O1, O2), and electrical sockets (40a-1, 40a-2) are provided at positions corresponding to the electrical plug-in portions (50d, 60d) on the first circuit board 40a. The electrical plug-in portions (50d, 60d) are mated with the electrical sockets (40a-1, 40a-2) to electrically connect the corresponding electrical connectors (50, 60) to the first circuit board 40a. Specifically, the electrical plug-in portion 50d is mated with the electrical socket 40a-1 to electrically connect the first electrical connector 50 to the first circuit board 40a, thereby achieving electrical connection between the positive and negative ends of the battery cell 20 and the first circuit board 40a through the first electrical connector 50. The electrical plug portion 60d is plugged into the electrical socket 40a-2, so that the second electrical connector 60 is electrically connected to the first circuit board 40a, thereby achieving electrical connection between the other end of the positive and negative poles of the battery cell 20 and the first circuit board 40a through the second electrical connector 60.

[0040] The battery pack structure of the embodiment of the present invention is cleverly designed for the structures of the first electrical connector 50 and the second electrical connector 60. On the one hand, the positive and negative poles of the battery cell 20 are connected to the first circuit board 40a. On the other hand, the cooperation of the bent extension section (50c, 60c) and the positioning groove (71, 72) enables the first electrical connector 50 and the second electrical connector 60 to be stably fixed to the skeleton 30 respectively. The cooperation of the electrical plug-in portion (50d, 60d) and the electrical socket (40a-1, 40a-2) enables the first electrical connector 50 and the second electrical connector 60 to form a stable electrical connection with the first circuit board 40a respectively.

[0041] As described above, the battery cell 20 is limited by the frame 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 circuit board 40 at both ends, for example, by welding connection, so as to achieve the limited fixation of the battery cell 20 and the frame 30.

[0042] The 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. The first electrical connector 50 and the second electrical connector 60 can be fixed by spot welding at the connection points corresponding to the positive and negative electrodes of the battery cell.

[0043] The electrical plug portion 60d is plugged into and mated with the electrical socket 40a-2 and then welded, thereby improving the stability of communication between the first electrical connector 50 and the second electrical connector 60 and the first circuit board 40a respectively.

[0044] Optionally, the first electrical connector 50 and the second electrical connector 60 are both sheet-shaped, for example, nickel sheets. In other embodiments, the first electrical connector 50 and the second electrical connector 60 may also be sheet-shaped or other shaped conductive structures made of other conductive materials.

[0045] For example, 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. Figure 3 As shown in the midpoint welding section (50a, 60a).

[0046] Then, the first electrical connector 50 and the second electrical connector 60 respectively extend and protrude along the outward lateral direction e and bend, and then extend toward and connect to the first circuit board 40a on the outer surface of the skeleton 30. 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 laterally extending bent section (50b, 60b).

[0047] In addition, this battery pack structure 100 can be applied to electric tools, and the use of electric 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 are bent to form a lateral extension bending section (50b, 60b), which can also effectively attenuate vibrations and avoid the influence of large vibrations involved in the use of electric tools on the internal structure.

[0048] 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 30 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.

[0049] The shapes of the positioning grooves (71, 72) are adapted to the shapes of the corresponding bent extension sections (50c, 60c), wherein the shape of the positioning groove 71 is adapted to the shape of the bent extension section 50c, and the shape of the positioning groove 72 is adapted to the shape of the bent extension section 60c, so that the bent extension sections (50c, 60c) are better positioned. Optionally, each bent extension section (50c, 60c) includes a main section arranged at one end close to the corresponding opening (O1, O2) and a connecting section arranged at one end of the main section away from the corresponding opening (O1, O2), the connecting section being bent relative to the main section, for example, being arranged perpendicularly relative to the main section, and the plug-in portion being arranged at one end of the connecting section away from the main section. With this design, the bent extension sections (50c, 60c) are better positioned to the skeleton 30, thereby enabling the first electrical connector 50 and the second electrical connector 60 to be better positioned to the skeleton 30.

[0050] See again Figure 3The first fixing portion (50e, 60e) is provided at one end of each bent extension section (50c, 60c) away from the corresponding opening (O1, O2), and the second fixing portion (71a, 72a) is provided at the corresponding position of each positioning groove (71, 72), and the first fixing portion (50e, 60e) and the second fixing portion (71a, 72a) are matched in a concave-convex manner. Specifically, the first fixing portion 50e is provided at one end of the bent extension section 50c away from the first opening O1, and the second fixing portion 71a is provided at the corresponding position of the positioning groove 71; the first fixing portion 60e is provided at one end of the bent extension section 60c away from the second opening O2, and the second fixing portion 72a is provided at the corresponding position of the positioning groove 72, wherein the first fixing portion 50e and the second fixing portion 71a are matched in a concave-convex manner, and the first fixing portion 60e and the second fixing portion 72a are matched in a concave-convex manner. By the concave-convex matching of the first fixing portion (50e, 60e) and the second fixing portion (71a, 72a), the bent extension section (50c, 60c) is better positioned to the skeleton 30, thereby enabling the first electrical connector 50 and the second electrical connector 60 to be better positioned to the skeleton 30.

[0051] Optionally, the first fixing portion (50e, 60e) is a fixing hole, and the second fixing portion (71a, 72a) is a convex column. In other embodiments, the first fixing portion (50e, 60e) is a convex column, and the second fixing portion (71a, 72a) is a fixing hole.

[0052] The first fixing portion (50e, 60e) and the plug-in portion (50d, 60d) can be arranged on both sides of the bending extension section (50c, 60c) relative to each other. Specifically, the first fixing portion 50e and the plug-in portion 50d are arranged on both sides of the bending extension section 50c relative to each other, and the first fixing portion 60e and the plug-in portion 60d are arranged on both sides of the bending extension section 60c relative to each other. Such a design allows the bending extension section (50c, 60c) to be better positioned to the skeleton 30 and the first circuit board 40a, thereby allowing the first electrical connector 50 and the second electrical connector 60 to be better positioned to the skeleton 30 and the first circuit board 40a.

[0053] Each electrical plug portion (50d, 60d) is bent relative to the corresponding bent extension section (50c, 60c). Specifically, the electrical plug portion 50d is bent relative to the bent extension section 50c, and the electrical plug portion 60d is bent relative to the bent extension section 60c. For example, the electrical plug portion 50d is perpendicular to the bent extension section 50c, and the electrical plug portion 60d is perpendicular to the bent extension section 60c. This design allows the bent extension sections (50c, 60c) to be better positioned on the first circuit board 40a, thereby allowing the first electrical connector 50 and the second electrical connector 60 to be better positioned on the first circuit board 40a.

[0054] In some embodiments, the two electrical connectors (50d, 60d) are parallel to each other and are located on opposite sides of the first surface, respectively. The axial length of the battery cell 20 is parallel to the electrical connectors (50d, 60d), resulting in a novel structural design and a simple layout. In other embodiments, the two electrical connectors (50d, 60d) may not be parallel, or may be located on the same side of the first surface.

[0055] Optionally, the first electrical connector 50 connects the positive pole of the battery cell 20 to the first circuit board 40a, the second electrical connector 60 connects the negative pole of the battery cell 20 to the first circuit board 40a, and the length of the bent extension section 60c of the second electrical connector 60 along the axial length direction of the battery cell 20 is greater than the length of the bent extension section 50c of the first electrical connector 50 along the axial length direction of the battery cell 20.

[0056] Each electrical plug-in portion (50d, 60d) comprises two contact terminals, respectively. The two contact terminals of each electrical plug-in portion (50d, 60d) are spaced apart along the longitudinal direction of the axis of the battery core. An electrical contact portion is provided on the inner side wall of the electrical socket (40a-1, 40a-2) at a position corresponding to each contact terminal. The electrical contact portion is located on both sides of the corresponding contact terminal, and the electrical contact portion contacts and cooperates with the corresponding contact terminal. The electrical connection between the electrical plug-in portion (50d, 60d) and the electrical socket (40a-1, 40a-2) is achieved through the cooperation between the contact terminal and the electrical contact portion located on both sides of the corresponding contact terminal.

[0057] See again Figures 1 to 3 , the skeleton 30 may include a first mounting portion 30a, a second mounting portion 30b and a third mounting portion 30c.

[0058] 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.

[0059] 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 .

[0060] In this embodiment, the second circuit board 40b is communicatively connected to the first circuit board 40a.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] See again Figure 2 and Figure 3The 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.

[0067] 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.

[0068] Optionally, the third mounting portion 30c adopts a locking structure.

[0069] See again Figure 1 and Figure 2 , the outer edge of the first mounting portion 30a may be arc-shaped.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] See also Figure 4 and Figure 5The 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.

[0074] 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 .

[0075] 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;

[0076] 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.

[0077] 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.

[0078] 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 .

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 and mount the first circuit board 40a.

[0083] 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.

[0084] 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 .

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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: A battery cell, a frame, and a first circuit board are sequentially connected along a radial direction of the battery cell, wherein the frame extends along an axial length direction of the battery cell; a temperature sensor, configured to detect the temperature of the battery cell, the temperature sensor being electrically connected to the first circuit board; The frame includes a shielding portion, the shielding portion 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; 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; A notch is provided on one side of the main body of the skeleton, the notch extending along the longitudinal direction of the axis of the battery core, and the shielding portion is provided in the notch; 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.

2. The battery pack structure according to claim 1, 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.

3. The battery pack structure according to claim 2, characterized in that: The positioning portion is arranged in the notch.

4. The battery pack structure according to claim 1, characterized in that: The shielding portion is a protrusion.

5. The battery pack structure according to claim 1, characterized in that: The temperature sensor is cylindrical.

6. The battery pack structure according to claim 1, characterized in that: An arcuate groove extending along the longitudinal direction of the axis of the battery core is further provided on the side of the skeleton facing the battery core, and the arcuate groove is adapted to the arcuate surface of the battery core.

7. The battery pack structure according to claim 1, characterized in that: 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.

8. The battery pack structure according to claim 7, 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.

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