Battery pack

Abstract

The battery pack comprises a housing (10), cells (20), a frame (30), and a circuit board (40) connected to one another in a radial direction of the cells, a first electrical connector (50) and a second electrical connector (60) disposed at both ends of the positive and negative electrodes in the axial direction of the cells and connected to the circuit board (40), respectively, and third electrical connectors (70a, 70b) connected to the circuit board (40) and configured to electrically connect to an electric power consuming device so that electric power from the cells (20) can be supplied to the electric power consuming device through the third electrical connectors (70a, 70b), wherein the cells (20), frame (30), and circuit board (40) connected together, the first electrical connector (50), the second electrical connector (60), and the third electrical connectors (70a, 70b) are slidably and positionally limitedly engaged in cavities in the housing (10). This technical solution has a simple assembly structure and can effectively prevent shaking inside the battery pack.

Description

[Technical field]

[0001] The present invention relates to a battery pack. [Background technology]

[0002] In order to improve the versatility of power tools and to prevent the working range of power tools from being limited by the position of the socket, there are many cordless power tools on the market. Cordless power tools are easy to hold, easy to operate, and have various functions, and can greatly reduce the workload, improve work efficiency, and realize mechanization of manual operations, so they are widely used in fields such as architecture, home decoration, automobiles, machinery, electricity, bridges, and gardening. The internal assembly structure of conventional battery packs suitable for use as power sources for cordless power tools is more complicated in order to avoid shaking. Summary of the Invention

[0003] An object of the present invention is to provide a battery pack which has a simple assembly structure and can effectively prevent shaking inside the battery pack.

[0004] A battery pack according to the present invention, Housing and A cell, a frame, and a circuit board connected to each other in sequence along a radial direction of the cell; a first electrical connector and a second electrical connector disposed on both ends of the positive and negative electrodes in the axial direction of the cell and connected to the circuit board; a third electrical connector connected to the circuit board and configured to electrically connect to a power consumer to enable power from the cells to be provided to the power consumer by the third electrical connector; The cells, frame and circuit board which are connected together, and the first, second and third electrical connectors are slidably engaged in position-limiting engagement with cavities in the housing.

[0005] Furthermore, the cells, frame and circuit board that are connected together, the first electrical connector, the second electrical connector and the third electrical connector are slidably engaged in the cavity of the housing along the length direction with limited positioning.

[0006] Further, the frame is provided with a protruding sliding key extending linearly along its length, and a corresponding sliding groove is arranged on the inner wall of the housing; or The frame is provided with a concave sliding groove extending linearly along its length, and a protruding sliding key that fits therein is correspondingly disposed on the inner wall of the housing.

[0007] Furthermore, the first electrical connector and the second electrical connector each extend laterally outward, are bent, and are attached to the outer surface of the frame, and extend to the circuit board and are connected to the circuit board.

[0008] Further, the first electrical connector and the second electrical connector each have an extension segment extending in opposing relation along a longitudinal direction of the axis of the cell, the extension segment and the circuit board maintaining a gap of at least 2 mm therebetween.

[0009] Further, the first electrical connector and the second electrical connector each have extending segments that extend in opposing directions along the length of the axis of the cell, the extending segments being spaced apart from one another by a distance of 3 mm or more.

[0010] Furthermore, the extension segment and the circuit board are spaced apart from each other by a distance of 4 mm or less.

[0011] Further, the frame extends along the length of the axis of the cell and extends outward in a direction perpendicular to the length of the axis of the cell to form a protruding mounting portion; the mounting portion is adapted to position and mount and connect the cell and the circuit board, The frame further includes an arc-shaped groove located between the mounting portions and extending along a length of the axis of the cell; The arcuate groove corresponds to the arcuate surface of the cell.

[0012] Furthermore, the width of the arcuate groove is smaller than the outer diameter of the cell.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows: In this technical solution, the cell, the frame and the circuit board are connected to each other in sequence along the radial direction of the cell, the cell is restricted in position by the frame, and the positive and negative electrodes of the cell are connected to the circuit board by a first electrical connector and a second electrical connector, and the two ends of the first electrical connector and the second electrical connector are fixedly connected to the cell and the circuit board, respectively. Specifically, a welding connection method is used to realize the restriction and fixation of the cell and the frame, and the first electrical connector and the second electrical connector play the role of electrical connection and also the role of restricting and fixing the position. In addition, the circuit board is directly fixed and restricted in position to the frame, and the third electrical connector is fixed and connected to the circuit board. Thus, the cell, the frame and the circuit board are connected together with the first electrical connector, the second electrical connector and the third electrical connector. The entire integrated structure is directly slidably engaged in the cavity of the housing to restrict its position, which is easy to assemble, and the integrated structure and the cavity further restrict its position to effectively prevent the internal shaking of the battery pack.

[0014] An object of the present invention is to provide a battery pack capable of effectively preventing internal vibration of the battery pack.

[0015] A battery pack according to the present invention, Housing and A cell, a frame, and a circuit board connected to each other in sequence along a radial direction of the cell; a first electrical connector and a second electrical connector disposed on both ends of the positive and negative electrodes in the axial direction of the cell and connected to the circuit board; a third electrical connector connected to the circuit board and configured to electrically connect to a power consumer to enable power from the cells to be provided to the power consumer by the third electrical connector; The frame is slidably engaged in a cavity of the housing to limit its position.

[0016] Furthermore, the cell, the frame, the circuit board, the first electrical connector, the second electrical connector, and the third electrical connector are connected to one another and assembled together.

[0017] Further, the frame is provided with a protruding sliding key extending linearly along its length, and a corresponding sliding groove is arranged on the inner wall of the housing; or The frame is provided with a concave sliding groove extending linearly along its length, and a protruding sliding key that fits therein is correspondingly disposed on the inner wall of the housing.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This technical solution connects the cell, frame, and circuit board to each other in sequence along the radial direction of the cell, and the cell and circuit board are respectively positionally restricted by the frame. After being connected in a positionally restricted manner, the frame and the housing cavity are slidably engaged to effectively prevent shaking inside the battery pack. [Brief description of the drawings]

[0019] In order to more clearly describe the specific embodiments of the present invention or the technical solutions of the prior art, the drawings necessary for describing the specific embodiments or the prior art are briefly described below. Of course, the drawings described below are only examples of the embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without requiring creative efforts. [Figure 1] FIG. 1 is a structural schematic diagram of a specific embodiment 1 of the present invention. [Diagram 2]FIG. 2 is a structural exploded schematic diagram of a specific embodiment 1 of the present invention. [Diagram 3] FIG. 3 is a structural assembly schematic diagram of a specific embodiment 1 of the present invention. [Figure 4] FIG. 4 is an exploded schematic diagram of a local structure of a specific embodiment 1 of the present invention. [Diagram 5] FIG. 5 is a structural perspective view of a second specific embodiment of the present invention. [Figure 6] FIG. 6 is a structural exploded view of a second specific embodiment of the present invention. [Figure 7] FIG. 7 is a structural plan view of a second specific embodiment of the present invention. [Figure 8] FIG. 8 is a longitudinal sectional view of a structure according to a second specific embodiment of the present invention. [Figure 9] FIG. 9 is another exploded structural schematic diagram of the specific embodiment 2 of the present invention. [Figure 10] FIG. 10 is an exploded structural schematic diagram of a cell, a frame, and a circuit board according to a second specific embodiment of the present invention. [Figure 11] FIG. 11 is a structural exploded schematic diagram of the second specific embodiment of the present invention from another viewpoint. [Figure 12] FIG. 12 is a structural schematic diagram of a specific embodiment 3 of the present invention. [Figure 13] FIG. 13 is a structural exploded view of a specific embodiment 3 of the present invention. [Figure 14] FIG. 14 is an exploded view of a local structure according to a third specific embodiment of the present invention. [Figure 15] FIG. 15 is a structural cross-sectional view of a specific embodiment 3 of the present invention. [Figure 16] FIG. 16 is a structural exploded view of another aspect of the third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The technical solution of the present invention will be described clearly and completely below with reference to the drawings. Of course, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, any other embodiments that a person skilled in the art can obtain without inventive efforts are within the scope of protection of the present invention.

[0021] Example 1 1, 2 and 3, a battery pack 100 includes a housing 10, a cell 20, a frame 30 and a circuit board 40, the cell 20, the frame 30 and the circuit board 40 being connected to each other in order along a radial direction of the cell 20, a first electrical connector 50 and a second electrical connector 60, each connected to the circuit board 40 and disposed at both ends of the positive and negative electrodes in the axial direction of the cell 20; a third electrical connector (70a, 70b) configured to be electrically connected to the power consumer to enable power from the cell (20) to be supplied to the power consumer by the third electrical connector (70a, 70b), the third electrical connector being connected to the circuit board (40); The cells 20, the frame 30 and the circuit board 40 which are connected together, the first electrical connector 50, the second electrical connector 60 and the third electrical connector (70a, 70b) are slidably engaged in the cavities of the housing 10 with positional limiting.

[0022] The cell 20 is positioned by the frame 30, and the positive and negative electrodes of the cell 20 are connected to the circuit board 40 by the first electrical connector 50 and the second electrical connector 60, and the two ends of the first electrical connector 50 and the second electrical connector 60 are fixedly connected to the cell 20 and the circuit board 40, respectively, specifically by a welding connection method, thereby realizing the positional restriction and fixation of the cell 20 and the frame 30.

[0023] The first electrical connector 50 and the second electrical connector 60 not only play a role in electrical connection, but also play a role in position limiting and fixing, and the circuit board 40 is directly fixed to the frame 30 to limit its position. Specifically, referring to FIG. 2 , the frame 30 is provided with a protruding hook structure 30b for directly fixing the circuit board 40 to the frame 30 to limit its position. Naturally, the frame 30 is provided with a corresponding mounting position for the circuit board 40. After the circuit board fits into the mounting position, it is fixed to the frame 30 by the protruding hook structure 30b.

[0024] The third electrical connector (70a, 70b) is fixedly connected to the circuit board 40, whereby the cells 20, the frame 30, and the circuit board 40 are integrally connected to the first electrical connector 50, the second electrical connector 60, and the third electrical connector (70a, 70b). The entire structure after integration is directly slidably engaged in the cavity of the housing 10 with limited positioning, as shown at 200 in FIG. 3, and can be easily assembled. Furthermore, the integrated structure and the cavity further limit the position, effectively preventing shaking inside the battery pack.

[0025] The cell 20, frame 30 and circuit board 40 which are connected together, and the first electrical connector 50, second electrical connector 60 and third electrical connector (70a, 70b) are slidably engaged in the cavity of the housing 10 along the length direction, i.e., the axial direction of the cell 10, with limited positioning.

[0026] As shown in FIG. 2, the cells 20, frame 30 and circuit board 40, which are connected together, and the first electrical connector 50, second electrical connector 60 and third electrical connector (70a, 70b) are combined to form an integrated structure 200, and when assembled, the integrated structure 200 is generally inserted into the cavity of the housing 10 along the direction indicated by arrow m, and then combined with an end cover to be fixed and sealed.

[0027] Referring to FIG. 2, the frame 30 is provided with a protruding sliding key 80 extending linearly along its length, and a sliding groove 10a that fits thereto is correspondingly arranged on the inner wall of the housing 10; The frame 30 is provided with a recessed slide groove extending linearly along its length, and a protruding slide key that fits therein is correspondingly disposed on the inner wall of the housing 10 .

[0028] The cells 20, the frame 30 and the circuit board 40 are combined with the first electrical connector 50, the second electrical connector 60 and the third electrical connector (70a, 70b) to form an integrated structure 200, which is basically not displaced relative to each other. When assembled and engaged with the housing 10, the protruding sliding keys 80 extending linearly along its length and installed on the frame 30 are linearly inserted along the mating sliding grooves 10a arranged corresponding to the inner walls of the housing 10, and thus the integrated structure 200 further forms a connection structure which is basically not displaced together with the housing 10, at which time it is sealed and fixed with the end covers to be connected and sealed, and will not swing inside the entire battery pack.

[0029] In addition, the first electrical connector 50 and the second electrical connector 60 each extend laterally outward, are bent, and attached to the outer surface of the frame 30 , and extend to the circuit board 40 to be connected to the circuit board 40 .

[0030] Specifically, referring to FIG. 4, the cell 20 is positioned in the frame 30, and the frame 30 is provided with connection openings O1 and O2 corresponding to the electrodes at both ends of the cell 20, respectively. The start ends of the first electrical connector 50 and the second electrical connector 60 are electrically connected to the electrodes at both ends of the cell 20 at the connection openings O1 and O2, respectively. Specifically, the first electrical connector 50 and the second electrical connector 60 are connected to the electrodes at both ends of the cell 20 by spot welding using a metal nickel sheet, and the connection portion by spot welding is shown as the spot welding segment 50a in FIG. 4. Next, the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e, and then affixed to the outer surface of the frame 30 and extend to and connect with the circuit board 40, and the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e to form laterally extending bent segments 50b, as shown in area A in FIG. 4.

[0031] In the above structural design, the first electrical connector 50 and the second electrical connector 60 are spaced apart from the outer casing of the cell, and the material that connects the first electrical connector 50 and the second electrical connector 60 to the electrodes of the cell 20 is obviously a conductive material, while in the present technical solution, the support frame 40 is an insulating material, and therefore the conductive first electrical connector 50 and the second electrical connector 60 are separated from the outer casing of the cell 20 by the insulating material, so that even if the outer casing of the cell 20 is damaged, no short circuit accident will occur, and the role of insulation protection is played.

[0032] In addition, since the battery pack 100 is applied to an electric power tool, which is subject to relatively large vibrations during use, the first electrical connector 50 and the second electrical connector 60 each extend and protrude outward in the horizontal direction e to form horizontally extending folded segments which can further effectively dampen vibrations and prevent the relatively large vibrations from affecting the internal structure during use of the electric power tool.

[0033] 2 and 4, the first electrical connector 50 and the second electrical connector 60 each have extending segments 50c and 60c that extend oppositely along the longitudinal axis of the cell 20, with the extending segments 50c and 60c maintaining a gap of at least 2 mm between the circuit board 40 and the extending segments 50c and 60c.

[0034] Since the first electrical connector 50 and the second electrical connector 60 are both made of conductive material, maintaining a gap of at least 2 mm between the extension segments 50c and 60c and the circuit board 40 can effectively prevent the first electrical connector 50 and the second electrical connector 60 from contacting the electronic components on the circuit board 40.

[0035] Furthermore, the extension segments 50c and 60c and the circuit board 40 are spaced apart by a distance of 4 mm or less, which prevents the height of the battery pack in the radial direction from becoming relatively large, and ensures that the structure of the battery pack is compact.

[0036] In addition, in order to ensure the safety of power consumption of the battery pack, the first electrical connector 50 and the second electrical connector 60 each have extension segments 50c and 60c extending oppositely along the longitudinal direction of the axis of the cell 20, and the extension segments 50c and 60c are spaced apart from each other with a spacing distance L of 3 mm or more.

[0037] 2 and 4, the frame 30 extends along the longitudinal direction of the axis of the cell 20 and extends outward in a direction perpendicular to the longitudinal direction of the axis of the cell 20 to form mounting portions (30a, 30b) protruding therefrom. The mounting portions 30a and 30b are suitable for positioning and mounting and connecting the cell 20 and the circuit board 40, respectively. Specifically, the mounting portion 30a is suitable for positioning and mounting the circuit board 40, in particular the circuit board 40 to which the third electrical connector (70a, 70b) is fixed, and the upwardly protruding portion of the mounting portion 30a at least partially envelops the side surface of the third electrical connector (70a, 70b).

[0038] The mounting portions 30b are suitable for positioning and mounting the cells 20. Specifically, the mounting portions 30b are respectively arranged on both ends of the electrodes of the corresponding cells 20, and the two opposing mounting portions 30b are arranged along the axis of the cells 20 to limit the position of the cells 20 in the axial direction.

[0039] Furthermore, the frame 30 is further provided with an arc-shaped groove 30c located between the mounting portions 30b and extending along the longitudinal direction of the axis of the cell 20, the arc-shaped groove 30c corresponding to the arc-shaped surface of the cell 20, and the arc-shaped groove 30c combined with the inner wall of the housing 10 forming a radial position limit for the cell.

[0040] Furthermore, the width of the arc-shaped groove 30c is smaller than the outer diameter of the cell 20, which prevents the radial width of the battery pack from being relatively large, thereby minimizing the outer dimension of the battery pack.

[0041] Example 2 5 to 11, a battery pack 100 includes a cell 20 and a circuit board 40, a first electrical connector 50 and a second electrical connector 60, the circuit board 40 and the cell 20 are installed with a gap between them, the first electrical connector 50 is disposed at one end of the cell 20 and connected to the circuit board 40, and the second electrical connector 60 is disposed at the other opposing end of the cell 20 and is also connected to the circuit board 40 and is spaced from the first electrical connector 50, with the gap distance L being 3 mm or more.

[0042] It is preferable that the above-mentioned cells 20 are 21700 cells or 18650 cells, the first electrical connector 50 and the second electrical connector 60 are made of a conductive material, preferably a nickel sheet, and the connection points of the first electrical connector 50 and the second electrical connector 60 corresponding to the positive and negative electrodes of the cells are preferably fixed using a spot welding connection.

[0043] Specifically, the cell 20 is positioned and restricted by the frame 30, and the positive and negative ends of the cell 20 are connected to the circuit board 40 by a first electrical connector 50 and a second electrical connector 60, and the two ends of the first electrical connector 50 and the second electrical connector 60 are fixedly connected to the cell 20 and the circuit board 40, respectively, specifically by a welding connection method, thereby realizing the position restriction and fixation of the cell 20 and the frame 30.

[0044] The first electrical connector 50 and the second electrical connector 60 not only play a role in electrical connection, but also play a role in position limiting and fixing, and the circuit board 40 is directly fixed to the frame 30 to limit its position. Specifically, referring to FIG. 9 , the frame 30 is provided with a protruding hook structure 30b for directly fixing the circuit board 40 to the frame 30 to limit its position. Naturally, the frame 30 is provided with a corresponding mounting position for the circuit board 40. After the circuit board fits into the mounting position, it is fixed to the frame 30 by limiting its position with the protruding hook structure 30b.

[0045] The above technical solution is expressed in that a first electrical connector and a second electrical connector, which are connected to both ends of the positive and negative electrodes of the cell, are respectively connected to a circuit board and are installed on the circuit board at a distance of at least 3 mm, which can effectively ensure the safety of discharging the battery pack.

[0046] 9 and 10, a first electrical connector 50 and a second electrical connector 60 each extend in opposing directions along the axial length of the cell 20 .

[0047] The cell 20 is positioned in the frame 30, and the frame 30 is provided with connection openings O1 and O2 corresponding to the electrodes at both ends of the cell 20, respectively. The start ends of the first electrical connector 50 and the second electrical connector 60 are electrically connected to the electrodes at both ends of the cell 20 at the connection openings O1 and O2, respectively. Specifically, the first electrical connector 50 and the second electrical connector 60 use metal nickel sheets that are connected to the electrodes at both ends of the cell 20 by spot welding, and the connection parts by spot welding are shown as spot welding segments 50a in FIG. 10 . Next, the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e, and then affixed to the outer surface of the frame 30 and extend to and connect to the circuit board 40, and the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e to form laterally extending bent segments 50b, as shown in area A in FIG. 10.

[0048] In the above structural design, the first electrical connector 50 and the second electrical connector 60 are spaced apart from the outer casing of the cell, and the material that connects the first electrical connector 50 and the second electrical connector 60 to the electrodes of the cell 20 is obviously conductive, while in this technical solution the support frame 40 is made of insulating material, and therefore the conductive first electrical connector 50 and the second electrical connector 60 are separated from the outer casing of the cell 20 by insulating material, so that even if the outer casing of the cell 20 is damaged, no short circuit accident will occur, and the role of insulation protection is played.

[0049] In addition, since the battery pack 100 is applied to an electric power tool, which is subject to relatively large vibrations during use, the first electrical connector 50 and the second electrical connector 60 each extend and protrude outward in the horizontal direction e to form horizontally extending folded segments which can further effectively dampen vibrations and prevent the relatively large vibrations from affecting the internal structure during use of the electric power tool.

[0050] Continuing to refer to Figures 9, 10 and 11, the battery pack 100 further includes a third electrical connector (70a, 70b) disposed on the circuit board 40, adjacent to the first electrical connector 50 or the second electrical connector 60, and configured to electrically connect to a power consumer device so that power from the cells 20 can be supplied to the power consumer device by the third electrical connector (70a, 70b).

[0051] The third electrical connector (70a, 70b) is fixedly connected to the circuit board 40, whereby the cells 20, the frame 30, and the circuit board 40 are integrally connected to the first electrical connector 50, the second electrical connector 60, and the third electrical connector (70a, 70b). The entire structure after integration is directly slidably engaged in the cavity of the housing 10 with limited positioning, as shown at 200 in FIG. 6, and can be easily assembled. Furthermore, the integrated structure and the cavity further limit the position, effectively preventing shaking inside the battery pack.

[0052] Specifically, the third electrical connector (70a, 70b) not only has a USB interface 70b suitable for the power consumption of 3C electronic products, but also has a high current discharge terminal 70a suitable for the power consumption of power tools; The third electrical connector (70a, 70b) comprises a pair of adjacent electrical connectors providing positive and negative poles, in particular the third electrical connector 70a is suitable for power consumption of a power tool and comprises a pair of adjacent electrical connectors providing positive and negative poles.

[0053] 8, 9 and 10, a battery pack 100 includes a cell 20 and a circuit board 40, a first electrical connector 50 and a second electrical connector 60, the first electrical connector 50 being disposed at one end of the cell 20 and connected to the circuit board 40, the second electrical connector 60 being disposed at the other opposite end of the cell 20 and also connected to the circuit board 40 and spaced apart from the first electrical connector 50, the first electrical connector 50 and the second electrical connector 60 having extension segments 50c and 60c respectively extending oppositely along the longitudinal direction of the axis of the cell 20, and the extension segments 50c and 60c respectively maintaining a gap of at least 2 mm between the circuit board 40 and the extension segments 50c and 60c, respectively, and the circuit board 40, i.e., L1≧2 mm.

[0054] The technical solution extends a first electrical connector and a second electrical connector, which are connected to both ends of the positive and negative electrodes of the cell, respectively, to connect to a circuit board, and prevents the first electrical connector and the second electrical connector from contacting and shorting with electronic elements on the circuit board, and therefore sets the extension segments of the first electrical connector and the second electrical connector to maintain a gap of at least 2 mm between the circuit board and the first and second electrical connectors, respectively, to ensure the safety of discharging the battery pack.

[0055] Furthermore, in order to avoid the overall dimensions of the battery pack from being too large and ensure that the battery pack is compact, the extension segments 50c and 60c and the circuit board 40 each maintain a distance of 4 mm or less, i.e., L1≦4 mm.

[0056] Also, referring to FIG. 11 , the battery pack 100 further includes a fourth electrical connector 70c, the circuit board 40 having corresponding mounting openings 40a, the fourth electrical connector 70c being fitted and mounted within the mounting openings 40a and essentially flush with the upper surface of the circuit board 40, and the fourth electrical connector 70c being configured to be connected to a charging source, thereby charging the cells 20 via the fourth electrical connector 70c.

[0057] It is preferable that the fourth electrical connector 70c uses a bidirectional charging and discharging interface, such as a type-c interface, through which the cell 20 can not only be charged, but also discharged externally through the type-c interface for use in consuming power for 3C types of power consumption devices.

[0058] The battery pack 100 further includes a third electrical connector 70a connected to the circuit board 40, adjacent to the fourth electrical connector 70c, located above the fourth electrical connector 70c and arranged in parallel vertically therewith, and configured to be electrically connected to a power consuming device so that power from the cells 20 can be supplied to the power consuming device by the third electrical connector 70a.

[0059] The third electrical connector 70a is suitable for power consumption of power tools, and preferably uses a male terminal, which has at least one pair of adjacent electrical connectors, which provide positive and negative poles, and which is for satisfying high current discharge.

[0060] Continuing to refer to FIGS. 8, 9, 10 and 11, the battery pack 100 includes a housing 10, a cell 20 and a circuit board 40 housed in the housing 10, a first electrical connector 50 disposed at one end of the cell 20 and connected to the circuit board 40; a second electrical connector 60 disposed at the other opposite end of the cell 20 and connected to the circuit board 40; a third electrical connector (70a, 70b) configured to electrically connect to a power consumer to enable power from the cell 20 to be provided to the power consumer by the third electrical connector (70a, 70b); a fourth electrical connector 70c configured to be connected to a charging source to charge the cell 20 via the fourth electrical connector 70c; The third electrical connector (70a, 70b) and the fourth electrical connector 70c are connected to the same side of the circuit board 40, and the circuit board 40 and the opposing first electrical connector 50 and / or second electrical connector 60 therebelow maintain a gap of at least 2 mm, and the circuit board 40 and the opposing inner wall of the housing 10 therebelow maintain a gap of 7 mm or less.

[0061] The circuit board 40 and the first electrical connector 50 and / or the second electrical connector 60 facing thereunder are spaced apart by a distance of 4 mm or less.

[0062] The circuit board 40 and the inner wall of the housing 10 facing thereover maintain a gap of at least 5 mm.

[0063] The technical solution sets the extended segments of the first electrical connector and the second electrical connector to maintain a gap of at least 2 mm between the circuit board, respectively, to ensure the safety of discharging the battery pack; the technical solution also arranges a third electrical connector and a fourth electrical connector, the third electrical connector is configured to be electrically connected to a power consuming device so that power from the cell can be supplied to the power consuming device through the third electrical connector, the fourth electrical connector is configured to be connectable to a charging source so that the cell is charged by the fourth electrical connector, and the third electrical connector and the fourth electrical connector are connected to the same side of the circuit board, so as to avoid the overall dimensions of the battery pack being too large and not to affect the arrangement of the third electrical connector and the fourth electrical connector, the circuit board and the inner wall of the housing facing thereover maintain a gap of 7 mm or less.

[0064] Example 3 12 to 16, a battery pack structure 100 includes a cell 20, a frame 30, and a first circuit board 40a, and the cell 20, the frame 30, and the first circuit board 40a are connected and installed in order along a radial direction of the cell 20, The frame 30 extends along the longitudinal direction of the axis of the cell 20, and A first mounting portion (30a, 30b) that extends outward along a direction perpendicular to the longitudinal direction of the axis of the cell 20 and is suitable for positioning and mounting and connecting the cell 20 and the first circuit board 40a, respectively; a second mounting portion 30c extending outward along the longitudinal direction of the axis of the cell 20 and adapted to position and mount and connect a second circuit board 40b; The second circuit board 40b is communicatively connected to the first circuit board 40a.

[0065] The first circuit board 40a is the main control board of the battery pack and has functions such as BMS management, and the second circuit board 40b is a sub-board on which a wake-up switch and / or lamp and other electronic elements are arranged.

[0066] The technical solution is to sequentially connect and install the cell, the frame, and the first circuit board along the radial direction of the cell, and the frame extends along the longitudinal direction of the cell's axis, and the frame extends outward in a direction perpendicular to the longitudinal direction of the cell's axis and along the longitudinal direction of the cell's axis, respectively, to form a first mounting portion and a second mounting portion, which respectively position and mount and connect the cell and the first circuit board, and position and mount and connect the second circuit board, and maintain a communication connection between the second circuit board and the first circuit board, and the structure has a novel and simple layout.

[0067] Specifically, referring to Figures 13 and 14, the first mounting portion (30a, 30b) comprises a first portion 30a that at least partially covers the ends of the cell 20 and is located at both ends of the cell 20 and in contact therewith, and a second portion 30b that supports, limits and connects to the first circuit board 40a, and spaces the first circuit board 40a and the main body of the frame 30, and is located on the edge side of the first circuit board 40a and is connected to it with its position limited.

[0068] The first portions 30a are arranged corresponding to both ends of the cell 20 in the longitudinal direction, and the spacing between them is suitable to exactly match the axial length of the cell 20, and it is preferable that the first portions 30a at both ends realize the positional restriction of the cell 20 in the longitudinal direction, and that the radial height of the first portions 30a of the cell 20 corresponds to the height of the radial end faces of the cell 20.

[0069] It is preferable that the second part 30b uses a hook structure for directly fixing and positioning the first circuit board 40a to the frame 30. Naturally, an attachment position for the first circuit board 40a is arranged on the frame 30, and after the circuit board fits into the attachment position, it is fixed to the frame 30 by restricting its position with the protruding hook structure 30b.

[0070] As described above, the cell 20 is restricted in position by the frame 30, and the positive and negative electrodes of the cell 20 are connected to the first circuit board 40a via the first electrical connector 50 and the second electrical connector 60, and the two ends of the first electrical connector 50 and the second electrical connector 60 are fixedly connected to the cell 20 and the circuit board 40, respectively, specifically by a welding connection method, thereby realizing the restricted and fixed positioning of the cell 20 and the frame 30.

[0071] It is preferable that the above-mentioned cells 20 are 21700 cells or 18650 cells, the first electrical connector 50 and the second electrical connector 60 are made of a conductive material, preferably a nickel sheet, and the connection points of the first electrical connector 50 and the second electrical connector 60 corresponding to the positive and negative electrodes of the cells are preferably fixed using a spot welding connection.

[0072] The first electrical connector 50 and the second electrical connector 60 function as an electrical connection and also as a position limiting and fixing device.

[0073] Continuing to refer to FIGS. 13 and 14, the first electrical connector 50 and the second electrical connector 60 each extend in opposing directions along the axial length of the cell 20 .

[0074] The cell 20 is positioned in the frame 30, and the frame 30 is provided with connection openings O1 and O2 corresponding to the electrodes at both ends of the cell 20, respectively. The start ends of the first electrical connector 50 and the second electrical connector 60 are electrically connected to the electrodes at both ends of the cell 20 at the connection openings O1 and O2, respectively. Specifically, the first electrical connector 50 and the second electrical connector 60 use metal nickel sheets that are connected to the electrodes at both ends of the cell 20 by spot welding, and the connection parts by spot welding are shown as spot welding segments 50a in FIG. 14 . Next, the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e, and then affixed to the outer surface of the frame 30 and extend to and connect to the first circuit board 40a, and the first electrical connector 50 and the second electrical connector 60 are each bent and extend outward along the horizontal direction e to form laterally extending bent segments 50b, as shown in area A in FIG. 14.

[0075] In the above structural design, the first electrical connector 50 and the second electrical connector 60 are spaced apart from the outer casing of the cell, and the material that connects the first electrical connector 50 and the second electrical connector 60 to the electrodes of the cell 20 is obviously conductive, while in this technical solution the support frame 40 is made of insulating material, and therefore the conductive first electrical connector 50 and the second electrical connector 60 are separated from the outer casing of the cell 20 by insulating material, so that even if the outer casing of the cell 20 is damaged, no short circuit accident will occur, and the role of insulation protection is played.

[0076] In addition, since this battery pack structure 100 is applied to an electric power tool, vibrations are always relatively large during use of the electric power tool. Therefore, the laterally extending folded segments formed by the first electrical connector 50 and the second electrical connector 60 extending and protruding outward along the lateral direction e and folding them can further play a role in effectively damping vibrations, thereby preventing the relatively large vibrations from affecting the internal structure during use of the electric power tool.

[0077] 12 and 13, the second mounting portion 30c is located on the edge side of the second circuit board 40b and is connected thereto with a positional restriction, and the second mounting portion 30c preferably uses a hook structure.

[0078] In addition, the second mounting portion 30c is adjacent to the end of the cell 20, specifically, the second mounting portion 30c is formed on the outer surface of the first portion 30a, i.e., the second mounting portion 30c is formed to extend outwardly from the outer surface of the first portion 30a and protrude.

[0079] The second mounting portions 30c are disposed at the position of the first portion 30a of the first mounting portion (30a, 30b), and the first portions 30a are located at both ends of the cell 20 and contact the ends of the cell 20.

[0080] Moreover, the second mounting portion 30c is located at the edge of the first portion 30a, which facilitates the assembly and position restriction of the second circuit board 40b.

[0081] 15 and 16, a battery pack structure 100 includes a housing 10, a cell 20 located in the housing 10 and connected in order along a radial direction of the cell 20, a frame 30, and a first circuit board 40a. The frame 30 extends outward along the longitudinal direction of the axis of the cell 10 to form a second mounting portion 30c. The second mounting portion 30c is suitable for positioning and mounting and connecting the second circuit board 40b. the second circuit board 40b is communicatively connected to the first circuit board 40a and includes at least one wake-up switch 40b-1; The housing 10 has an end cover 10a corresponding to the second circuit board 40b, and a button 10a-1 is arranged at a position on the end cover 10a corresponding to the wake-up switch 40b-1, and a boss p suitable for contacting the wake-up switch 40b-1 is provided on the inside of the button 10a-1.

[0082] In this technical solution, the second circuit board on which the wake-up switch is arranged is installed in the longitudinal direction of the cell axis, and a button is arranged on the corresponding end cover, and a boss suitable for contacting the wake-up switch is provided on the inside of the button. When a user operates and uses the battery pack, the user can easily grasp it by squeezing the longitudinal surface of the battery pack with four fingers, and the thumb is positioned exactly corresponding to the button, making it easy to press and operate, and can be easily grasped and pressed with one hand.

[0083] The button 10a-1 is suitable for elastic deformation and / or the outer surface of the button 10a-1 is essentially flush with the outer surface of the end cover 10a, see specifically FIG.

[0084] The above-mentioned battery pack structure 100 further includes a first mounting portion (30a, 30b), which includes a first portion 30a that at least partially covers the ends of the cells 20 and is located at both ends of the cells 20 and in contact therewith, and a second portion 30b that supports, limits and connects to the first circuit board 40a, spaces the first circuit board 40a and the main body of the frame 30, and is located on the edge side of the first circuit board 40a and is connected to it with a limited position.

[0085] The second mounting portion 30c is disposed at the position of the first portion 30a of the first mounting portion (30a, 30b), and is connected to the edge side of the second circuit board 40b with its position restricted thereto.

[0086] Referring to FIG. 16, a battery pack structure 100 includes a cell 20, a frame 30, and a first circuit board 40a, which are connected in sequence along the radial direction of the cell 20. The frame 30 extends along the longitudinal direction of the axis of the cell 20 and extends outward in a direction perpendicular to the longitudinal direction of the axis of the cell 20 to form first mounting portions (30a, 30b) protruding therefrom; The first mounting portions (30a, 30b) are suitable for positioning and mounting and connecting the cell 20 and the first circuit board 40a, respectively; The frame 30 is located between the first mounting portions (30a, 30b) and further includes an arc-shaped groove 30d extending along the longitudinal direction of the axis of the cell 20. The arcuate grooves 30d correspond to the arcuate surfaces of the cells 20.

[0087] The arcuate groove 30d corresponds to the arcuate surface of the cell 20, and the arcuate groove 30d combines with the inner wall of the housing 10 to form a radial position limit for the cell.

[0088] Moreover, the width of the arc-shaped groove 30c is smaller than the outer diameter of the cell 20, so as to avoid the radial width of the battery pack being relatively large, thereby minimizing the size of the outer dimension of the battery pack.

[0089] The technical solution sequentially connects and installs the cell, the frame and the first circuit board along the radial direction of the cell, and forms a first mounting part protruding outwardly extending in the radial direction of the cell, i.e., in a direction perpendicular to the length of the axis of the cell, and an arc-shaped groove extending along the length of the axis of the cell is disposed between the first mounting parts, the arc-shaped groove corresponds to the arc-shaped surface of the cell, and the first mounting part limits the position of the cell in the axial direction and combines with the arc-shaped groove to limit the position in the radial direction.

[0090] Finally, it should be noted that the above embodiments are merely for illustrating the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments, or equivalently replace some or all of the technical features therein, but such modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. 1. A battery pack comprising: Housing and A cell, a frame, and a circuit board connected to each other in sequence along a radial direction of the cell; a first electrical connector and a second electrical connector, each of which is disposed on both ends of the positive and negative electrodes in the axial direction of the cell and connected to the circuit board; a pair of third electrical connectors connected to both ends of the circuit board in a longitudinal direction with the circuit board sandwiched therebetween, and configured to be electrically connected to a power consuming device so that power from the cells can be supplied to the power consuming device by the third electrical connectors; the cell, the frame, and the circuit board, which are connected together, and the first electrical connector, the second electrical connector, and the third electrical connector are slidably engaged in a position-limiting manner with a cavity of the housing; The frame is integrally formed with both ends in a longitudinal direction, the cell is housed within the frame such that the length of the cell corresponds to the length of the frame; a connection opening is formed at each of the two end portions of the frame at a position corresponding to the electrodes at both ends of the housed cell; each of the first electrical connector and the second electrical connector is electrically connected to the electrode of the cell from outside the frame; A battery pack characterized in that the first electrical connector, the second electrical connector, the third electrical connector, and the circuit board are insertable into the housing from one end to the other end in a longitudinal direction while attached to the frame.

2. 2. The battery pack according to claim 1, wherein the cells, frame and circuit board connected together, and the first electrical connector, the second electrical connector and the third electrical connector are slidably engaged in a position-limiting manner into a cavity of the housing along a longitudinal direction.

3. The frame is provided with a protruding sliding key extending linearly along its length, and a corresponding sliding groove is arranged on the inner wall of the housing; or 3. The battery pack according to claim 1, wherein the frame is provided with a recessed sliding groove extending linearly along its length, and a protruding sliding key that fits thereto is correspondingly disposed on the inner wall of the housing.

4. 2. The battery pack of claim 1, wherein the first electrical connector and the second electrical connector each extend laterally outward, are folded and attached to an outer surface of the frame, and extend to the circuit board and are connected to the circuit board.

5. 5. The battery pack according to claim 4, wherein the first electrical connector and the second electrical connector each have an extension segment extending oppositely along a longitudinal direction of the axis of the cell, and the extension segment and the circuit board maintain a gap of at least 2 mm.

6. 5. The battery pack of claim 4, wherein the first electrical connector and the second electrical connector each have an extension segment that extends oppositely along a longitudinal direction of the axis of the cell, the extension segments being spaced apart from each other by a distance of 3 mm or more.

7. 6. The battery pack according to claim 5, wherein the extension segment and the circuit board are spaced apart from each other by a distance of 4 mm or less.

8. The frame extends along a lengthwise direction of the axis of the cell, and extends outward in a direction perpendicular to the lengthwise direction of the axis of the cell to form a protruding mounting portion; the mounting portion is adapted to position and mount and connect the cell and the circuit board, The frame further includes an arc-shaped groove located between the mounting portions and extending along a length of the axis of the cell; The battery pack according to claim 1 , wherein the arcuate groove corresponds to an arcuate surface of the cell.

9. The battery pack according to claim 8 , wherein the width of the arc-shaped groove is smaller than an outer diameter of the cell.

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