battery pack

Abstract

The present application discloses a battery pack for adapting to a first device or a second device, which includes a battery cell assembly, a power management module and a circuit board assembly. The power management module is electrically connected to the battery cell assembly, and is used to convert the input voltage of the battery cell assembly into a first target current for powering the first device, and convert the input voltage of the battery cell assembly into a second target current for powering the second device; the circuit board assembly is electrically connected to the battery cell assembly and the power management module, and the circuit board assembly includes a first circuit board and a second circuit board. The power management module, the first circuit board, and the second circuit board are located at the same end of the battery pack, and the power management module is fixed to the first circuit board and the second circuit board. In the above arrangement, the power management module is fixed on two circuit boards, and the three are arranged at the same end of the battery pack along the length direction. By stacking the power management modules, waste of space can be avoided, which is conducive to miniaturization of the battery pack volume.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery pack. Background Art

[0002] To increase the versatility of power tools and expand their operating range beyond the limitations of socket locations, many power tools on the market now utilize battery packs. Power tools offer portability, ease of operation, and diverse functionality, significantly reducing labor intensity, improving efficiency, and mechanizing manual operations. Consequently, they are widely used in construction, housing renovation, automotive, machinery, electricity, bridge construction, gardening, and other fields, and are now commonplace in homes. The size of the battery pack significantly impacts its compatibility with a wide range of power tools. Summary of the Invention

[0003] The present application provides a battery pack, which is conducive to miniaturization of the battery pack structure.

[0004] According to a first aspect of the present application, a battery pack is provided for adapting to a first device or a second device, the battery pack comprising:

[0005] Battery cell components;

[0006] a power management module, electrically connected to the battery cell assembly, configured to convert an input voltage of the battery cell assembly into a first target current for supplying power to the first device, and to convert an input voltage of the battery cell assembly into a second target current for supplying power to the second device;

[0007] A circuit board assembly is electrically connected to the battery cell assembly and the power management module. The circuit board assembly includes a first circuit board and a second circuit board. The power management module, the first circuit board, and the second circuit board are located at the same end of the battery pack, and the power management module is fixed to the first circuit board and the second circuit board.

[0008] Furthermore, the first circuit board and the second circuit board are perpendicular to each other.

[0009] Furthermore, the battery pack further comprises a support frame for fixing the battery cell assembly; the first circuit board and the second circuit board are fixed to the support frame and / or the battery cell assembly; or,

[0010] The battery pack further includes a housing assembly, and the first circuit board and / or the second circuit board is fixed to the housing assembly.

[0011] Furthermore, the first circuit board and the second circuit board are respectively fixedly connected to the supporting frame, and the first circuit board and the second circuit board are connected by a wire.

[0012] Furthermore, the plane where the second circuit board is located is perpendicular to the axial direction of the battery cell assembly; the battery cell assembly includes a first electrode and a second electrode;

[0013] The battery pack also includes a nickel sheet assembly, which is fixed to the second circuit board and electrically connected to the first electrode and the second electrode of the battery cell assembly. The nickel sheet assembly is used to electrically connect the first electrode and the second electrode of the battery cell assembly to the second circuit board.

[0014] Furthermore, the first circuit board and the second circuit board form a receiving space for receiving the power management module;

[0015] The horizontal projection of the accommodating space is less than or equal to the horizontal projection of the entirety formed by the first circuit board and the second circuit board, and the vertical projection of the accommodating space is less than or equal to the vertical projection of the entirety formed by the first circuit board and the second circuit board.

[0016] Furthermore, the first circuit board and the second circuit board are parallel to each other, and the second circuit board is fixed to the first circuit board.

[0017] Furthermore, the circuit board assembly further includes a conductive column, two ends of which are fixedly connected to the first circuit board and the second circuit board, and electrically connect the first circuit board and the second circuit board.

[0018] Furthermore, the battery pack further includes a support frame for fixing the battery cell assembly;

[0019] The first circuit board is arranged below the second circuit board, and the first circuit board is fixedly connected to the supporting frame.

[0020] Furthermore, the first circuit board and the second circuit board are spaced apart from each other and enclose a receiving space for receiving the power management module.

[0021] Furthermore, the battery pack further includes a support frame for fixing the battery cell assembly, and the support frame includes:

[0022] A first supporting portion, configured to support the battery cell assembly;

[0023] a second supporting portion, configured to support the circuit board assembly;

[0024] The first supporting portion and the second supporting portion are arranged along the length direction of the battery pack, and the length direction of the battery pack is parallel to the axial direction of the battery cell assembly.

[0025] Furthermore, the battery cell assembly includes at least one battery cell; the first supporting portion includes an arc-shaped supporting end surface, and the supporting end surface abuts against a side surface of the battery cell.

[0026] Furthermore, the supporting end surface extends from one end of the second supporting portion to the other end of the second supporting portion; or, the supporting end surface is only located at two ends of the first supporting portion and is used to support two ends of the battery cell assembly.

[0027] Furthermore, a first heat dissipation slot is provided below the first support portion, and at least a portion of the battery cell assembly is exposed through the first heat dissipation slot.

[0028] Furthermore, the first supporting portion includes a positioning end plate, the positioning end plate is located at an end of the first supporting portion away from the second supporting portion, and one end of the battery cell assembly abuts against the positioning end plate;

[0029] A penetrating second heat dissipation slot is formed on the positioning end plate, and at least a portion of the battery core assembly is exposed through the second heat dissipation slot.

[0030] Furthermore, the battery pack further comprises a nickel sheet assembly fixedly connected to the battery cell assembly, and the nickel sheet assembly comprises a positioning portion fixed to an end portion of the battery cell assembly;

[0031] At least a portion of the positioning portion located at one end of the battery core assembly away from the second supporting portion is located in the second heat dissipation groove.

[0032] Furthermore, the battery pack also includes a support frame for fixing the battery cell assembly, and the power management module, the battery cell assembly, the circuit board assembly and at least part of the support frame are arranged inside the shell assembly.

[0033] Furthermore, the housing assembly includes:

[0034] A housing, wherein the battery cell assembly, the circuit board assembly and the support frame are arranged inside the housing, and a positioning notch is provided on the housing;

[0035] A latch groove is fixed to the positioning notch, and a recessed buckle position is provided on the latch groove. When the battery pack matches the first device, the buckle position on the latch groove cooperates with the positioning device on the first device.

[0036] Furthermore, one end of the latch slot is provided with a protrusion extending outward, and the upper surface of the protrusion abuts against the inner wall surface of the shell.

[0037] Furthermore, the latch slot includes an arc-shaped abutting surface, and the abutting surface abuts against the side surface of the battery cell.

[0038] Furthermore, the housing is provided with openings at both ends along the length direction, namely a first opening and a second opening, and the positioning notch is provided at the end away from the first opening;

[0039] The shell assembly further includes a limiting end plate, which is fixed to the second opening; the battery core assembly, the circuit board assembly and the supporting frame enter the interior of the shell through the first opening.

[0040] Furthermore, the support frame includes a positioning end plate, the positioning end plate abuts against an end of the battery cell assembly away from the circuit board assembly; an end of the latch slot away from the first opening abuts against the positioning end plate;

[0041] The housing assembly further comprises a fastener, which sequentially fixes and connects the limiting end plate, the positioning end plate of the support frame and the latch groove.

[0042] Furthermore, the edge of the latch groove away from the first opening extends outward to form a shielding portion, and the plane where the end surface of the shielding portion away from the first opening is located coincides with the plane where the end surface of the housing away from the first opening is located.

[0043] Furthermore, the shell assembly also includes a decorative end plate, which is fixed to the second opening and abuts against the limiting end plate; the end face of the decorative end plate away from the first opening, the plane where the end face of the shielding portion away from the first opening is located, and the plane where the end face of the shell away from the first opening is located coincide with each other.

[0044] Furthermore, the battery pack further includes:

[0045] a first discharge interface, configured to cooperate with the first device and provide power support to the first device;

[0046] a first charging interface, configured to cooperate with a power supply device and to supply power to the battery pack;

[0047] Wherein, the first discharge interface and the first charging interface are both located at one end of the battery pack close to the circuit board assembly.

[0048] Furthermore, the battery pack further includes a second discharge interface, which is used to cooperate with the second device and provide power support to the second device;

[0049] The battery pack includes an interface end plate, which is arranged at one end of the battery pack close to the circuit board assembly. The surface of the interface end plate is recessed inward to form a positioning space for accommodating the second discharge interface.

[0050] Furthermore, the second discharge interface includes a wire portion and an interface portion; the positioning space includes a first positioning cavity for accommodating the wire portion and a second positioning cavity for accommodating the interface portion;

[0051] The first positioning cavity is bent on the interface end plate; and / or at least a portion of the second positioning cavity extends inwardly along the length direction of the battery pack.

[0052] Furthermore, the battery pack also includes a support frame for fixing the battery cell assembly, and the interface end plate serves as at least a part of the support frame; or, the battery pack also includes a shell assembly for accommodating the power management module, the battery cell assembly and the circuit board assembly, and the interface end plate serves as at least a part of the shell assembly.

[0053] Furthermore, the battery cell assembly further includes a first electrode and a second electrode;

[0054] The battery pack also includes a nickel sheet assembly, which includes a first connecting portion fixedly connected to the first electrode and a second connecting portion fixedly connected to the second electrode; at least portions of the first connecting portion and the second connecting portion are bent and pass through the circuit board assembly, and electrically connect the first electrode and the second electrode to the circuit board assembly.

[0055] Furthermore, the power management module includes:

[0056] a first power management module, fixed to the first circuit board, configured to convert an input voltage into a first target output current, wherein the first target output current is used to supply power to the first device;

[0057] The second power management module is fixed to the second circuit board and is used to convert the input voltage into a second target output current, and the second target output current is used to supply power to the second device.

[0058] Furthermore, the circuit board assembly further includes a button circuit board, and the battery pack further includes a support frame for fixing the battery cell assembly;

[0059] The button circuit board is fixed to the support frame and electrically connected to the first circuit board and / or the second circuit board;

[0060] The first circuit board and / or the second circuit board are formed as a whole and the button circuit board are arranged at two opposite ends of the battery cell assembly along the axial direction.

[0061] Furthermore, an indicator light is provided on the button circuit board, and the indicator light is used to display the charging and discharging status of the battery pack and the power level of the battery cell assembly.

[0062] Furthermore, the support frame includes a positioning end plate for abutting against the battery cell assembly and away from the first circuit board and the second circuit board; the button circuit board is fixed to one end of the positioning end plate away from the battery cell assembly.

[0063] Furthermore, one end of the positioning end plate away from the battery cell assembly extends outward to form a plurality of positioning posts, and the plurality of positioning posts enclose a mounting space for mounting the button circuit board, and the button circuit board is fixed in the mounting space.

[0064] Furthermore, the first target current is greater than the second target current.

[0065] According to a second aspect of the present application, a battery pack is provided, comprising a battery cell assembly, a power management module, and a circuit board assembly;

[0066] The circuit board assembly includes a first circuit board and a second circuit board that are arranged alternately; the first circuit board and the second circuit board are arranged on the same side of the battery cell assembly.

[0067] The power management module includes a first power management module and a second power management module. The first power management module is arranged on the first circuit board, and the second power management module is arranged on the second circuit board.

[0068] The technical solution provided by this application may have the following beneficial effects:

[0069] In the above arrangement, the power management module is fixed on two circuit boards, and the three are arranged at the same end of the battery pack along the length direction. By stacking the power management modules, waste of space can be avoided, which is conducive to miniaturization of the battery pack volume.

[0070] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery pack in one embodiment of the present application.

[0072] Figure 2 2 is another schematic diagram of the three-dimensional structure of the battery pack in one embodiment of the present application.

[0073] Figure 3 It is a schematic diagram of the exploded structure of the battery pack in one embodiment of the present application.

[0074] Figure 4 This is another schematic diagram of the exploded structure of the battery pack in one embodiment of the present application.

[0075] Figure 5 It is a schematic diagram of the three-dimensional structure of the battery cell assembly and the circuit board assembly of the battery pack in one embodiment of the present application.

[0076] Figure 6 This is another three-dimensional structural schematic diagram of the battery cell assembly and circuit board assembly of the battery pack in one embodiment of the present application.

[0077] Figure 7 It is a three-dimensional structural schematic diagram of the internal structure of a battery pack in one embodiment of the present application.

[0078] Figure 8 2 is another three-dimensional structural schematic diagram of the internal structure of the battery pack in one embodiment of the present application.

[0079] Figure 9 It is a schematic diagram of the three-dimensional structure of the battery cell assembly and the nickel sheet assembly of the battery pack in one embodiment of the present application.

[0080] Figure 10 This is another three-dimensional structural schematic diagram of the battery cell assembly and nickel sheet assembly of the battery pack in one embodiment of the present application.

[0081] Figure 11 It is a schematic diagram of the three-dimensional structure of the support frame of the battery pack in one embodiment of the present application.

[0082] Figure 12 This is another schematic diagram of the three-dimensional structure of the support frame of the battery pack in one embodiment of the present application.

[0083] Figure 13 This is another three-dimensional structural diagram of the internal structure of the battery pack in one embodiment of the present application.

[0084] Figure 14 This is another three-dimensional structural diagram of the internal structure of the battery pack in one embodiment of the present application.

[0085] Figure 15 2 is a schematic diagram of the three-dimensional structure of the latch slot of the battery pack in one embodiment of the present application.

[0086] Figure 16 2 is another schematic diagram of the three-dimensional structure of the latch slot of the battery pack in one embodiment of the present application.

[0087] Figure 17 It is a schematic diagram of the cross-sectional structure of a battery pack in one embodiment of the present application.

[0088] Figure 18 yes Figure 17 Magnified view of area A in the middle.

[0089] Description of Reference Numerals

[0090] Battery Pack 10

[0091] Battery cell assembly 100

[0092] Battery Cell 110

[0093] First electrode 111

[0094] Second electrode 112

[0095] Power Management Module 200

[0096] First power management module 210

[0097] Second power management module 220

[0098] Circuit board assembly 300

[0099] First circuit board 310

[0100] Second circuit board 320

[0101] Accommodation space 330

[0102] Conductive column 340

[0103] Button circuit board 350

[0104] Indicator light 351

[0105] Lampshade 352

[0106] Insulation Board 360

[0107] Control button 370

[0108] Housing assembly 400

[0109] Housing 410

[0110] Positioning notch 411

[0111] First opening 413

[0112] Second opening 414

[0113] Latch slot 420

[0114] Buckle position 421

[0115] Raised portion 422

[0116] Abutment surface 423

[0117] Shielding portion 424

[0118] Limit end plate 430

[0119] Fastener 440

[0120] Decorative end plate 450

[0121] Support frame 500

[0122] First support portion 510

[0123] Support end surface 511

[0124] First heat dissipation slot 512

[0125] Positioning end plate 513

[0126] Positioning column 5131

[0127] Card space 5132

[0128] Second heat dissipation slot 514

[0129] Second support portion 520

[0130] Nickel sheet assembly 600

[0131] First connection portion 610

[0132] Second connection portion 620

[0133] Positioning portion 630

[0134] First discharge interface 710

[0135] Second discharge interface 720

[0136] Lead wire portion 721

[0137] Interface part 722

[0138] First charging port 800

[0139] Interface end plate 900

[0140] Positioning Space 910

[0141] First positioning cavity 911

[0142] Second positioning cavity 912

[0143] First discharge port 920

[0144] First charging port 930 DETAILED DESCRIPTION

[0145] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0146] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the field of this application. The use of "first," "second," and similar terms in this specification and claims does not indicate any order, quantity, or importance, but is simply used to distinguish different components. Similarly, words such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. If only "a" is referred to, this will be separately stated. "Multiple" or "several" means two or more. Unless otherwise indicated, words such as "front," "rear," "lower," and / or "upper" are for convenience of description only and are not limited to a single position or spatial orientation. Words such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but can also include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0147] The following is a detailed description of the embodiments of the present application in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0148] like Figure 1 and Figure 2 As shown, the present application relates to a battery pack 10, which can be adapted to a first device or a second device. The battery pack 10 supplies different currents to the first device and the second device. In other words, the battery pack 10 can provide different target currents to different electronic devices to adapt to different electronic devices.

[0149] In this embodiment, the first device is a high-current electrical device, such as garden tools, power tools, etc. The second device is a low-current electrical device, such as a mobile phone, earphones, tablet, smart watch, etc. among 3C products.

[0150] Combine Figure 3 and Figure 4 As shown, refer to Figure 5 The battery pack 10 includes a cell assembly 100 , a power management module 200 , a circuit board assembly 300 , a housing assembly 400 and a support frame 500 .

[0151] The power management module 200 is electrically connected to the battery cell assembly 100 and is used to convert the input voltage of the battery cell assembly 100 into a first target current for powering the first device, and to convert the input voltage of the battery cell assembly 100 into a second target current for powering the second device. Figure 5 As shown, the power management module 200 includes a first power management module 210 and a second power management module 220. The first power management module 210 is configured to convert an input voltage into a first target output current, which is used to power a first device. The second power management module 220 is configured to convert an input voltage into a second target output current, which is used to power a second device. The first target current is greater than the second target current.

[0152] like Figure 5 and Figure 6 As shown, the circuit board assembly 300 is electrically connected to the battery cell assembly 100 and the power management module 200. The battery cell assembly 100 includes a first electrode (positive electrode) and a second electrode (negative electrode). The first electrode and the second electrode are both electrically connected to the circuit board assembly 300, and are electrically connected to the circuit board assembly 300 through the power management module 200. Specifically, the circuit board assembly 300 includes a first circuit board 310 and a second circuit board 320. The power management module 200 is fixed to the first circuit board 310 and the second circuit board 320. In some embodiments, the first power management module 210 is fixed to the first circuit board 310, and the second power management module 220 is fixed to the second circuit board 320, which facilitates subsequent maintenance work and improves space utilization. At this time, the first circuit board 310 acts as a high-current protection board, providing high current for the first device; the second circuit board 320 acts as a PD protection board, providing low current for the second device. Of course, in other embodiments, it is not necessary to fix the first power management module 210 and the second management module in the above manner. The electronic components of the power management module 200 can be arranged based on the space enclosed by the first and second circuit boards 310, 320. For example, the first management module can be mounted on both the first and second circuit boards 310, 320, or only on the first or second circuit board 310, 320. Similarly, the second management module can be mounted on both the first and second circuit boards 310, 320, or only on the first or second circuit board 310, 320. The specific arrangement is determined by the space between the first and second circuit boards 310, 320.

[0153] It should be noted that Figure 6 In the illustrated embodiment, since the first circuit board and the second circuit board are arranged in parallel, the power management module 200 located between the two circuit boards is blocked and cannot be seen.

[0154] like Figure 7 and Figure 8 As shown, gather when necessary Figures 1-4 As shown, the support frame 500 is used to secure the battery cell assembly 100 and the circuit board assembly 300. The power management module 200, the battery cell assembly 100, the circuit board assembly 300, and at least a portion of the support frame 500 are disposed within the housing assembly 400. Furthermore, the power management module 200, the first circuit board 310, and the second circuit board 320 are located at the same end of the battery pack 10. In this embodiment, the support frame 500 is first used to connect the battery cell assembly 100, the circuit board assembly 300, and the power management module 200 to form a whole, which is then secured within the housing assembly 400. Of course, in other embodiments, the support frame 500 may not be provided, and the housing assembly 400 alone may be used to secure the electronic components and the circuit board assembly 300.

[0155] like Figure 9 and Figure 10 As shown, refer to Figure 5-Figure 8 As shown. The battery cell assembly 100 includes at least one battery cell 110. In this embodiment, the battery cell assembly 100 is formed by connecting multiple cylindrical battery cells 110 in series, and the battery cells 110 are arranged in a direction X perpendicular to the axis of the battery cell 110. Specifically, the battery pack 10 also includes a nickel sheet assembly 600, which is used to connect multiple battery cells 110 in series to form the battery cell assembly 100. The nickel sheet assembly 600 includes a first connecting portion 610 fixedly connected to the first electrode 111 of the battery cell assembly 100 and a second connecting portion 620 fixedly connected to the second electrode 112. At least part of the first connecting portion 610 and the second connecting portion 620 are bent and pass through the circuit board assembly 300, and electrically connect the first electrode 111 and the second electrode 112 to the circuit board assembly 300. In the above arrangement, the nickel sheet assembly 600 plays the role of electrically connecting the battery cells 110 to form the battery cell assembly 100, and electrically connecting the battery cell assembly 100 to the circuit board assembly 300. The nickel sheet assembly 600 and the battery cell 110 are fixedly connected by spot welding, which serves to securely connect adjacent battery cells 110 and also securely connect the battery cell assembly 100 and the circuit board assembly 300. The first connecting portion 610 and the second connecting portion 620 are bent to penetrate the circuit board assembly 300, effectively utilizing space and improving space utilization.

[0156] Based on this, the power management module 200, the first circuit board 310 and the second circuit board 320 are located at any end of the axial direction of the battery cell 110. Of course, in other embodiments, the battery cell 110 can also be of other shapes, and the arrangement of the battery cell 110 can also be different. In this case, the power management module 200, the first circuit board 310 and the second circuit board 320 are located at any section of the battery pack 10 along the length direction. Since the battery pack 10 needs to be adapted to the first electronic device and the second electronic device, and the power consumption of the two is different. In other words, the power management module 200 in the battery pack 10 needs to convert the same voltage into a first target current and a second target current of different sizes. Therefore, two sets of management modules (a first management module and a second management module) are required.

[0157] In one design, the first management module and the second management module are laid flat and fixed on the same circuit board, and the circuit board is placed on the peripheral side of the battery cell assembly 100. Since the first management module and the second management module include electronic components of various sizes, and some of them include electronic components of larger sizes (for example, capacitors), the thickness or width of the battery pack 10 will be too large. At the same time, due to the adoption of a flat and fixed method, in order to meet the installation requirements of larger electronic components, it will be necessary to reserve too much space, resulting in a large amount of space being wasted in the housing assembly 400, and ultimately it is difficult to achieve a miniaturized design of the battery pack 10. However, in the above-mentioned setting of the present application, the power management module 200 is fixed on two circuit boards (the first circuit board 310 and the second circuit board 320), and the three are arranged at the same end of the battery pack 10 along the length direction. By stacking the power management modules 200, waste of space can be avoided, which is conducive to achieving a miniaturized volume of the battery pack 10.

[0158] like Figure 3 、 Figure 5 and Figure 7 As shown, in one embodiment, the first circuit board 310 and the second circuit board 320 are perpendicular to each other. The vertical arrangement of the first circuit board 310 and the second circuit board 320 can effectively utilize the end space of the battery pack 10.

[0159] Furthermore, the first circuit board 310 and the second circuit board 320 are fixed to the support frame 500 and the battery cell assembly 100. At the same time, the support frame 500 plays a role in fixing and supporting the battery cell assembly 100. In the above manner, the first circuit board 310 and the second circuit board 320 are fixedly connected. Of course, in other embodiments, the first circuit board 310 can be fixedly connected only through the support frame 500, or can be fixedly connected only through the battery cell assembly 100. Alternatively, as described above, when the battery pack 10 does not include the support frame 500, the first circuit board 310 and / or the second circuit board 320 can also be fixedly connected by being fixed to the shell assembly 400.

[0160] It should be noted that the first circuit board 310 and the second circuit board 320 are fixed to one end of the battery cell assembly 100 via the nickel sheet assembly 600 .

[0161] Because the first circuit board 310 and the second circuit board 320 are arranged perpendicularly, the surface area of ​​the first circuit board 310 and the second circuit board 320 relative to each other is relatively small. If a small area of ​​welding or bonding is used to achieve a fixed and electrical connection between the two, there is a risk of the connection structure breaking. Therefore, in this embodiment, the support frame 500 is provided with a snap-in position 421 for supporting and securing the circuit board assembly 300. The first circuit board 310 and the second circuit board 320 are respectively fixedly connected to the support frame 500. Furthermore, the first circuit board 310 and the second circuit board 320 are electrically connected via wires.

[0162] In the above arrangement, the first circuit board 310 and the second circuit board 320 are fixedly connected by the support frame 500 and are flexibly electrically connected by the wires. This ensures the stability of the fixed connection between the first circuit board 310 and the second circuit board 320 while achieving electrical connection between the two.

[0163] Furthermore, the plane where the second circuit board 320 is located is perpendicular to the axial direction of the battery cell assembly 100, and the plane where the first circuit board 310 is located is parallel to or coincides with the axial direction of the battery cell assembly 100. After the battery cells 110 are connected in series through the nickel sheet assembly 600, the first electrode 111 and the second electrode 112 of the battery cell assembly 100 are formed. The nickel sheet assembly 600 is fixed to the second circuit board 320 and is electrically connected to the first electrode 111 and the second electrode 112 of the battery cell assembly 100. In other words, the nickel sheet assembly 600 is used to electrically connect the first electrode 111 and the second electrode 112 of the battery cell assembly 100 to the second circuit board 320. Of course, in other embodiments, the positions of the first circuit board 310 and the second circuit board 320 can also be swapped.

[0164] In the above arrangement, the nickel sheet assembly 600 serves to connect and secure multiple battery cells 110 in series, thereby connecting the multiple battery cells 100 to form a single unit. Simultaneously, the nickel sheet assembly 600 also provides an electrical connection between the battery cell assembly 100 and the circuit board assembly 300. Furthermore, the nickel sheet assembly 600 is secured to the circuit board assembly 300 and the battery cells 100 by welding or spot welding, thereby strengthening the fixed connection between the battery cell assembly 100 and the circuit board assembly 300.

[0165] Furthermore, the first circuit board 310 and the second circuit board 320 enclose a storage space 330 for accommodating the power management module 200. The horizontal projection of the storage space 330 is less than or equal to the horizontal projection of the entirety formed by the first circuit board 310 and the second circuit board 320, and the vertical projection of the storage space 330 is less than or equal to the vertical projection of the entirety formed by the first circuit board 310 and the second circuit board 320. In other words, the power management module is fixed to the first circuit board 310 and the second circuit board 320, and the space it occupies does not exceed the area enclosed by the first circuit board 310 and the second circuit board 320, thereby ensuring that the power management module 200 can fully utilize the storage space 330 and maximize space utilization.

[0166] like Figure 4 、 Figure 6 and Figure 8 As shown, in another embodiment, the first circuit board 310 and the second circuit board 320 are parallel to each other. The second circuit board 320 is fixed to the first circuit board 310. In the embodiment corresponding to the above figure, the planes on which the first circuit board 310 and the second circuit board 320 are located are both parallel to the axial direction of the battery cell 110. Of course, in other embodiments, the planes on which the first circuit board 310 and the second circuit board 320 are located can also be perpendicular to the axial direction of the battery cell 110.

[0167] Furthermore, the circuit board assembly 300 further includes a conductive column 340 , both ends of which are fixedly connected to the first circuit board 310 and the second circuit board 320 , and electrically connect the first circuit board 310 and the second circuit board 320 .

[0168] In the above arrangement, since the first and second circuit boards 310 and 320 are arranged in parallel, the surface area of ​​the first and second circuit boards 310 and 320 facing each other is relatively large. This larger surface allows for the placement of conductive posts 340 having a relatively large cross-section for electrically and securely connecting the first and second circuit boards 310 and 320. In this manner, the first and second circuit boards 310 and 320 are both securely and securely connected via the conductive posts 340, achieving both an effective electrical connection and a simple structure with reliable stability.

[0169] Continuing with the above figure, the first circuit board 310 is disposed below the second circuit board 320 and is fixedly connected to the support frame 500. Furthermore, the nickel sheet assembly 600 is fixed to the first circuit board 310, providing an electrical connection between the cell assembly 100 and the circuit board assembly 300 while further strengthening the fixed connection between the cell assembly 100 and the circuit board assembly 300. Of course, in other embodiments, the positions of the first circuit board 310 and the second circuit board 320 can also be swapped vertically.

[0170] Furthermore, the first circuit board 310 and the second circuit board 320 are spaced apart and enclose a storage space 330 for accommodating the power management module 200. The electronic components in the power management module 200 are soldered to the first circuit board 310 and the second circuit board 320, respectively, and are located between the first circuit board 310 and the second circuit board 320. It should be noted that when the circuit board assembly 300, the battery cell assembly 100, etc. are fixed inside the housing assembly 400, if there is a certain gap between the inner wall of the housing assembly 400 and the circuit board assembly 300, then some of the electronic components in the power management module 200 can be fixed to the end face of the first circuit board 310 away from the second circuit board 320, or fixed to the end face of the second circuit board 320 away from the first circuit board 310. It is only necessary to ensure that most of the components in the power management module 200 are located between the first circuit board 310 and the second circuit board 320.

[0171] Of course, in other embodiments, the first circuit board 310 and the second circuit board 320 can also be staggered at other angles, but it is necessary to ensure that the first circuit board 310 and the second circuit board 320 are arranged on the same side of the battery cell assembly 100 to achieve a miniaturized design of the battery pack 10.

[0172] like Figure 11 and Figure 12 As shown, if necessary, combined Figure 3 、 Figure 4 、 Figure 7 and Figure 8 The supporting frame 500 includes a first supporting portion 510 and a second supporting portion 520 .

[0173] The first support portion 510 is used to support the battery cell assembly 100. The second support portion 520 is used to support the circuit board assembly 300. The first support portion 510 and the second support portion 520 are arranged along the length of the battery pack 10. It should be noted that the length of the battery pack 10 is parallel to the axial direction of the battery cell assembly 100 and the battery cells 110 therein.

[0174] Through the above arrangement, the internal space of the support frame 500 is functionally and structurally divided, making the structural arrangement of the support frame 500 more reasonable and more compatible with the corresponding structures of the battery cell assembly 100, the circuit board assembly 300, and the power management module 200. The circuit board assembly 300 can be fixed to the second support portion 520, so that the circuit board assembly 300 is located at one end of the battery pack 10.

[0175] It should be noted that, in some embodiments, the support frame 500 may be completely located inside the housing assembly 400 and be enclosed by the housing assembly 400. Alternatively, in other embodiments, the end surface of the support frame 500 may be exposed to the housing assembly 400 and constitute at least a portion of the end surface of the battery pack 10.

[0176] Furthermore, the first support portion 510 includes an arc-shaped support end surface 511 . The support end surface 511 abuts against the side surface of the battery cell 110 to firmly support the battery cell 110 .

[0177] like Figure 11 As shown, in one embodiment, the support end surface 511 extends from one end of the second support portion 520 to the other end of the second support portion 520. Through the above arrangement, the side surface of the battery cell 110 is fully supported, thereby avoiding the risk of displacement of the battery cell 110.

[0178] like Figure 12 As shown, in another embodiment, the support end surfaces 511 are located only at the two ends of the first support portion 510 and are used to support the two ends of the battery cell assembly 100. Through this arrangement, while providing sufficient support and fixation, the contact area between the support end surfaces 511 and the battery cell assembly 100 can be appropriately reduced, thereby improving the heat dissipation capacity of the battery cell assembly 100, protecting the safety of the battery pack 10, and extending its life.

[0179] Further, such as Figure 12 As shown, a first heat dissipation slot 512 is defined below the first support portion 510 and extends perpendicularly to the axis of the battery cell 110. At least a portion of the battery cell assembly 100 is exposed through the first heat dissipation slot 512. This arrangement further enhances the heat dissipation capability of the battery cell assembly 100, protecting the safety of the battery pack 10 and extending its lifespan.

[0180] like Figure 11 -and Figure 14As shown, the first support portion 510 further includes a positioning end plate 513, which is located at one end of the first support portion 510 away from the second support portion 520. One end of the battery cell assembly 100 abuts against the positioning end plate 513 to limit the battery cell assembly 100. A second heat dissipation slot 514 is provided through the positioning end plate 513, and at least part of the battery cell assembly 100 is exposed through the second heat dissipation slot 514. Through the above arrangement, while limiting the battery cell assembly 100, the contact area between the positioning end plate 513 and the battery cell assembly 100 can be appropriately reduced, thereby further improving the heat dissipation capacity of the battery cell assembly 100, protecting the safety of the battery pack 10 and increasing its lifespan.

[0181] Further integration Figure 2 and Figure 3 As shown, the nickel sheet assembly 600 includes a positioning portion 630 fixed to the end of the battery cell assembly 100. At least a portion of the positioning portion 630 located at the end of the battery cell assembly 100 away from the second support portion 520 is located within the second heat dissipation slot 514. This arrangement avoids the problem of the positioning portion 630 in the nickel sheet assembly 600 occupying excessive space and increasing the length of the battery pack 10. It also helps to improve the heat dissipation capacity of the battery cell assembly 100.

[0182] like Figures 1-4 As shown, if necessary, combined Figure 15-18 The housing assembly 400 includes a shell 410 , a latch slot 420 and a limiting end plate 430 .

[0183] The battery cell assembly 100, circuit board assembly 300, and support frame 500 are disposed within the interior of the housing 410, and a positioning notch 411 is provided on the circumference of the housing 410. A latch slot 420 is fixed to the positioning notch 411. The latch slot 420 is provided with a recessed snap-in position 421. When the battery pack 10 is matched with the first device, the snap-in position 421 on the latch slot 420 cooperates with the positioning device on the first device. For example, the positioning device on the first device is a latch. When the battery pack 10 is matched with the first device, the snap-in position 421 and the latch snap-in are connected, thereby securing the battery pack 10 to the first device and preventing the battery pack 10 from falling during operation of the first device.

[0184] In this embodiment, the latch slot 420 and the outer shell 410 are relatively independent components, and the two are matched and fixed when the battery pack 10 is to be assembled. Through such an arrangement, the latch slot 420 and the outer shell 410 can be made of two different materials. For example, in order to ensure a stable connection between the latch slot 420 and the latch in the first device and to reduce the difficulty of the process, the latch slot 420 can be made of a metal material with higher hardness and better stability. In order to ensure the portability of the battery pack 10, the outer shell 410 can be made of a lighter plastic. Of course, in other embodiments, the latch slot 420 and the outer shell 410 can also be integrally formed components.

[0185] Further, such as Figure 17 and Figure 18 As shown, one end of the latch slot 420 is provided with an outwardly extending protrusion 422, the upper surface of which abuts against the inner wall of the housing 410. Furthermore, the end surface 4221 of the latch slot 420 provided with the protrusion 422 abuts against the side wall 4111 of the housing 410 provided with the positioning notch 411. This arrangement restricts the latch slot 420 from moving away from the battery cell 110 and also restricts the latch slot 420 from moving to the left in the figure.

[0186] Further, such as Figure 15 and Figure 16 As shown, it is necessary to combine Figure 7 、 Figure 8 、 Figure 11 and Figure 12 The latch groove 420 and the positioning notch 411 are away from the second support portion 520 and are disposed above the first support portion 510. Figure 16 As shown, the bottom of the latch groove 420 further includes an arc-shaped abutting surface 423, which abuts against the peripheral side surface of the battery cell 110. In this way, the latch groove 420 is restricted from moving in a direction close to the battery cell 110.

[0187] like Figure 17 and Figure 18 As shown, if necessary, combined Figure 3 and Figure 4 As shown, the housing 410 has openings at both ends along its length, namely a first opening 413 and a second opening 414. The positioning notch 411 is provided at the end away from the first opening 413. In other words, the first opening 413 is close to the second support portion 520 and away from the first support portion 510; the second opening 414 is close to the first support portion 510 and away from the second support portion 520.

[0188] The retaining end plate 430 is fixed to the second opening 414. The battery cell assembly 100, circuit board assembly 300, and support frame 500 enter the interior of the housing 410 through the first opening 413. The latch slot 420 is then fixed to the positioning notch 411. Finally, the positioning end plate 513 is fixed to the second opening 414. This secures the housing 410 assembly to the battery cell assembly 100, circuit board assembly 300, support frame 500, and latch slot 420.

[0189] The end of the latch slot 420 away from the first opening 413 abuts against the positioning end plate 513. The housing assembly 400 further includes a fastener 440 that sequentially securely connects the limiting end plate 430, the positioning end plate 513 of the support frame 500, and the latch slot 420. This secure connection between the latch slot 420, the support frame 500, and the housing assembly 400 is achieved.

[0190] Furthermore, the edge of the latch slot 420 away from the first opening 413 extends outward to form a shielding portion 424. The plane of the end surface of the shielding portion 424 away from the first opening 413 coincides with the plane of the end surface of the housing 410 away from the first opening 413. This arrangement makes the outer surfaces of the latch slot 420 and the housing 410 flush, improving the overall aesthetics. It also prevents foreign matter from being deposited on uneven joints.

[0191] Furthermore, in order to avoid the exposure of the fastener 440, the shell assembly 400 also includes a decorative end plate 450, which is fixed to the second opening 414 and abuts against the surface of the limiting end plate 430 away from the positioning end plate 513. The decorative end plate 450 can be fixedly connected to the edge of the shell 410 by ultrasonic welding to shield the fastener 440 and other structures located inside the shell 410 to achieve ugliness. Among them, the plane where the end face of the decorative end plate 450 away from the first opening 413 and the end face of the shielding portion 424 away from the first opening 413 are located coincide with the plane where the end face of the shell 410 away from the first opening 413 is located. Through the above arrangement, the flushness of the latch slot 420 and the outer surface of the shell assembly 400 can be further improved, and the flatness of the outer surface of the battery pack 10 can be improved, which is conducive to improving the overall aesthetics. At the same time, external impurities can be deposited on the uneven connection.

[0192] Further, such as Figure 4As shown, the circuit board assembly 300 also includes a button circuit board 350, which is fixed to the support frame 500 and electrically connected to the first circuit board 310 and / or the second circuit board 320. The first circuit board 310 and the second circuit board 320 form a unit and are disposed along with the button circuit board 350 at opposite ends of the battery cell assembly 100 along the axial direction. In this embodiment, the first circuit board 310 and the second circuit board 320 are disposed near the first opening 413, while the button circuit board 350 is disposed near the second opening 414.

[0193] The button circuit board 350 is electrically connected to the first circuit board 310 or the second circuit board 320 via wires. The wires extend along the axis of the battery cell 110. The circuit board assembly 300 further includes an insulating plate 360 ​​disposed around the battery cell 110 to isolate the wires from the battery cell.

[0194] Continue as Figure 4 As shown, in this embodiment, the button circuit board 350 is fixed to the end of the positioning end plate 513 away from the battery cell assembly 100. Specifically, the end of the positioning end plate 513 away from the battery cell assembly 100 extends outward to form a plurality of positioning posts 5131. The plurality of positioning posts 5131 enclose a retaining space 5132 for retaining the button circuit board 350. The button circuit board 350 is fixed to the retaining space 5132. This method achieves a fixed connection of the button circuit board 350 while preventing the button circuit board 350 from occupying excessive space, thereby facilitating a compact design of the battery pack 10.

[0195] Furthermore, when fasteners 440 are used to securely connect the limiting end plate 430, the positioning end plate 513 of the support frame 500, and the latch slot 420, the fasteners 440 are secured to the protruding positioning posts 5131 on the positioning end plate 513. This arrangement avoids the problem of excessive thickness of the positioning end plate 513, which would otherwise arise from providing positioning holes of a certain depth to accommodate the fasteners. The positioning posts 5131 are fully utilized, serving the dual function of securing the fasteners 440 and the button circuit board 350.

[0196] In this embodiment, the button circuit board 350 can be used to control the charging and discharging of the battery pack 10 and can also be used to control the battery pack 10's power level display. Of course, in other embodiments, the battery pack 10 can automatically charge and discharge, in which case the button circuit board 350 can be used only to control the battery pack 10's power level display. In this embodiment, a control button 370 is provided on the end surface of the battery pack 10 near the button circuit board 350. By clicking the control button 370, the user can control the on / off button on the button circuit board 350 to charge and discharge the battery pack 10 and / or display the power level.

[0197] Further, continue as Figure 4 As shown, the button circuit board 350 is provided with an indicator light 351, which is used to display the charge and discharge status of the battery pack 10 and the power level of the battery cell assembly 100. The indicator light 351 is also equipped with a lampshade 352 for guiding light. The end of the lampshade 352 away from the button circuit board 350 is exposed and is used to display information about whether the indicator light 351 is on or off to the user. Specifically, the indicator light 351 can display different colors to indicate charging or discharging, and can also display different colors to indicate the power level of the battery cell assembly 100. The color reminder can reduce or prevent users from simultaneously discharging the battery pack 10, improving safety and extending the battery life. Alternatively, the number of indicator lights 351 can be set to multiple, and different numbers of indicator lights 351 can be lit to correspond to the power level of the battery cell assembly 100. Through the above settings, the human-computer interaction experience is enhanced.

[0198] like Figure 5 and Figure 6 As shown, refer to Figure 1 、 Figure 3 and Figure 4 The battery pack 10 further includes a first discharge interface 710 , a second discharge interface 720 and a first charging interface 800 .

[0199] The first discharge interface 710 is used to cooperate with a first device and provide power support to the first device. The second discharge interface 720 is used to cooperate with a second device and provide power support to the second device. The first charging interface 800 is used to cooperate with an external power supply device and to supply power to the battery pack 10. The first discharge interface 710 and the first charging interface 800 are both located at one end of the battery pack 10 close to the circuit board assembly 300. In the above arrangement, it is convenient to achieve electrical connection between the first discharge interface 710 and the first charging interface 800 and the circuit board assembly 300.

[0200] Furthermore, the first discharge interface 710 and the first charging interface 800 are arranged on the same side of the battery pack 10. In the above arrangement, when the battery pack 10 cooperates with the first device and supplies power to the first device, at least part of the battery pack 10 enters the interior of the first device. At this time, the first discharge interface 710 of the battery pack 10 matches the power supply interface corresponding to the first device. In other words, the end of the battery pack 10 provided with the first discharge interface 710 will enter the interior of the first device, then, the first charging interface 800 located on the same side as the first discharge interface 710 will also enter the interior of the first device. Then, when the battery pack 10 supplies a large current to the first device, the first charging interface 800 is covered and the battery pack 10 cannot be charged. Through the above arrangement, the user's misoperation is avoided, which causes the battery pack 10 to be powered and discharged at the same time, thereby improving the safety performance of the battery pack 10 and extending its service life.

[0201] In this embodiment, the second discharge interface 720 includes a wire portion 721 and an interface portion 722. The interface portion 722 may include multiple different discharge interfaces (e.g., Lightning interface, Typr-C interface, etc.). Through the above configuration, the second discharge interface 720 can charge second devices with different interfaces, increasing the convenience of use.

[0202] like Figure 1 、 Figure 11 and Figure 12 As shown, the battery pack 10 includes an interface end plate 900, which is disposed at one end of the battery pack 10 near the circuit board assembly 300. The surface of the interface end plate 900 is recessed inward to form a positioning space 910 for accommodating the second discharge interface 720. In this embodiment, the end plate on the side of the support frame 500 away from the first support portion 510 serves as the interface end plate 900. In other words, the interface end plate 900 serves as at least a portion of the support frame 500. The interface end plate 900 and the positioning end plate 513 are arranged relative to each other along the length of the support frame 500. Of course, in other embodiments, the interface end plate 900 may also serve as at least a portion of the housing assembly 400. In other words, the interface end plate 900 serves as at least a portion of the housing assembly 400.

[0203] Further, such as Figure 11 and Figure 12 As shown, the positioning space 910 includes a first positioning cavity 911 for accommodating the wire portion 721 and a second positioning cavity 912 for accommodating the interface portion 722 .

[0204] The first positioning cavity 911 is bent on the interface end plate 900 so that space for accommodating the wire portion 721 can be increased within a limited space, thereby appropriately increasing the length of the wire portion 721, thereby facilitating the use of the second discharge interface 720 to charge the second device.

[0205] At least a portion of the second positioning cavity 912 extends inwardly along the length direction of the battery pack 10. In other words, the second positioning cavity 912 extends into the interior of the second support portion 520. In the above arrangement, since only the circuit board assembly 300 and the power management module 200 are provided inside the second support portion 520, some remaining space is reserved. Extending the second positioning cavity 912 into the interior of the second support portion 520 can make full use of its space, effectively improving the internal space utilization rate of the battery pack 10, and facilitating the miniaturization design of the battery pack 10. At the same time, extending the second positioning cavity 912 toward the interior of the battery pack 10 can reduce the end face area of ​​the interface end plate 900 occupied by the second positioning cavity 912, thereby reserving more end face area to set the above-mentioned first positioning cavity 911, and appropriately extending the length of the wire portion 721, thereby improving the convenience of user use.

[0206] Further, such as Figure 1 As shown, the interface end plate 900 is also provided with a through first discharge port 920 and a first charging port 930. The first discharge port 920 is provided corresponding to the first discharge interface 710 so that the first discharge interface 710 is exposed. When the battery pack 10 cooperates with the first device to supply power thereto, the power supply interface of the first device is electrically connected to the first discharge interface 710 through the first discharge port 920. The first charging port 930 is provided corresponding to the first charging interface 800 so that the first charging interface 800 is exposed. When the battery pack 10 cooperates with an external power supply device so that the external power supply device supplies power to the battery pack 10, the contacts of the external power supply device are electrically connected to the first charging interface 800 through the first charging port 930.

[0207] In the above configuration, the first discharge port 920, first charge port 930, and second discharge port 720 are all located on the same side of the battery pack 10. When the battery pack 10 is used with a first device and providing power to the first device, at least a portion of the battery pack 10 is inserted into the interior of the first device. In this case, the first discharge port 710 of the battery pack 10 mates with the corresponding power supply port on the first device. In other words, the end of the battery pack 10 where the first discharge port 710 and first discharge port 920 are located is inserted into the interior of the first device. Consequently, the first charge port 800, the corresponding first charge port 930, and the second discharge port are also inserted into the interior of the first device. Therefore, when the battery pack 10 is providing high-current power to the first device, not only are the first charge port 800 and first charge port 930 covered, preventing charging of the battery pack 10, but the second discharge port 720, used for connection to a second device, is also covered, preventing the battery pack 10 from simultaneously discharging the first and second devices. Since the target currents output by the first discharge interface 710 and the second discharge interface 720 are different in magnitude, the battery pack 10 is prevented from discharging the first device and the second device simultaneously, thereby improving the safety performance of the battery pack 10 and extending its service life.

[0208] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A battery pack, adapted for use with a first device or a second device, characterized in that: The battery pack includes: Battery cell components; a power management module electrically connected to the battery cell assembly, the power management module comprising a first power management module and a second power management module, the first power management module being configured to convert an input voltage of the battery cell assembly into a first target current for supplying power to the first device, and the second power management module being configured to convert an input voltage of the battery cell assembly into a second target current for supplying power to the second device; a circuit board assembly electrically connected to the battery cell assembly and the power management module, the circuit board assembly comprising a first circuit board and a second circuit board, the power management module, the first circuit board, and the second circuit board being located at the same end of the battery pack, and the first power management module being fixed to the first circuit board, and the second power management module being fixed to the second circuit board; the first circuit board and the second circuit board forming a receiving space for receiving the power management module; a first discharge interface, configured to cooperate with the first device and to provide power support to the first device; a first charging interface, configured to cooperate with a power supply device and to supply power to the battery pack; a second discharge interface, configured to cooperate with the second device and to provide power support to the second device; The first discharge interface, the first charging interface and the second discharge interface are all arranged on the same side of the battery pack.

2. The battery pack according to claim 1, wherein: The first circuit board and the second circuit board are perpendicular to each other.

3. The battery pack according to claim 2, wherein: The battery pack further comprises a support frame for fixing the battery cell assembly; the first circuit board and the second circuit board are fixed to the support frame and / or the battery cell assembly; or, The battery pack further includes a housing assembly, and the first circuit board and / or the second circuit board is fixed to the housing assembly.

4. The battery pack according to claim 3, wherein: The first circuit board and the second circuit board are respectively fixedly connected to the supporting frame, and the first circuit board and the second circuit board are connected by a wire.

5. The battery pack according to claim 3, wherein: The plane where the second circuit board is located is perpendicular to the axial direction of the battery cell assembly; the battery cell assembly includes a first electrode and a second electrode; The battery pack also includes a nickel sheet assembly, which is fixed to the second circuit board and electrically connected to the first electrode and the second electrode of the battery cell assembly. The nickel sheet assembly is used to electrically connect the first electrode and the second electrode of the battery cell assembly to the second circuit board.

6. The battery pack according to claim 3, wherein: The horizontal projection of the accommodating space is less than or equal to the horizontal projection of the entirety formed by the first circuit board and the second circuit board, and the vertical projection of the accommodating space is less than or equal to the vertical projection of the entirety formed by the first circuit board and the second circuit board.

7. The battery pack according to claim 1, wherein: The first circuit board and the second circuit board are parallel to each other, and the second circuit board is fixed to the first circuit board.

8. The battery pack according to claim 7, wherein: The circuit board assembly further includes a conductive column, two ends of which are fixedly connected to the first circuit board and the second circuit board, and electrically connect the first circuit board and the second circuit board.

9. The battery pack according to claim 7, wherein: The battery pack further includes a support frame for fixing the battery cell assembly; The first circuit board is arranged below the second circuit board, and the first circuit board is fixedly connected to the supporting frame.

10. The battery pack according to claim 7, wherein: The first circuit board and the second circuit board are spaced apart from each other and enclose an accommodating space for accommodating the power management module.

11. The battery pack according to claim 1, wherein: The battery pack further includes a support frame for fixing the battery cell assembly, and the support frame includes: A first supporting portion, configured to support the battery cell assembly; a second supporting portion, configured to support the circuit board assembly; The first supporting portion and the second supporting portion are arranged along the length direction of the battery pack, and the length direction of the battery pack is parallel to the axial direction of the battery cell assembly.

12. The battery pack according to claim 11, wherein: The battery cell assembly includes at least one battery cell; the first support portion includes an arc-shaped support end surface, and the support end surface abuts against a side surface of the battery cell.

13. The battery pack according to claim 12, wherein: The supporting end surface extends from one end of the second supporting portion to the other end of the second supporting portion; or, the supporting end surface is only located at two ends of the first supporting portion and is used to support two ends of the battery cell assembly.

14. The battery pack according to claim 11, wherein: A first heat dissipation slot is provided below the first support portion, and at least a portion of the battery cell assembly is exposed through the first heat dissipation slot.

15. The battery pack according to claim 11, wherein: The first supporting portion includes a positioning end plate, the positioning end plate is located at an end of the first supporting portion away from the second supporting portion, and one end of the battery cell assembly abuts against the positioning end plate; A penetrating second heat dissipation slot is formed on the positioning end plate, and at least a portion of the battery core assembly is exposed through the second heat dissipation slot.

16. The battery pack according to claim 15, wherein: The battery pack further includes a nickel sheet assembly fixedly connected to the battery cell assembly, and the nickel sheet assembly includes a positioning portion fixed to an end of the battery cell assembly; At least a portion of the positioning portion located at one end of the battery core assembly away from the second supporting portion is located in the second heat dissipation groove.

17. The battery pack according to claim 1, wherein: The battery pack further includes a shell assembly and a support frame for fixing the battery cell assembly. The power management module, the battery cell assembly, the circuit board assembly and at least part of the support frame are arranged inside the shell assembly.

18. The battery pack according to claim 17, wherein: The housing assembly comprises: A housing, wherein the battery cell assembly, the circuit board assembly and the support frame are arranged inside the housing, and a positioning notch is provided on the housing; A latch groove is fixed to the positioning notch, and a recessed buckle position is provided on the latch groove. When the battery pack matches the first device, the buckle position on the latch groove cooperates with the positioning device on the first device.

19. The battery pack according to claim 18, wherein: One end of the latch slot is provided with a protrusion extending outward, and the upper surface of the protrusion abuts against the inner wall surface of the shell.

20. The battery pack according to claim 18, wherein: The latch slot includes an arc-shaped abutting surface, and the abutting surface abuts against the side surface of the battery core.

21. The battery pack according to claim 18, wherein: The housing is provided with openings at both ends along the length direction, namely a first opening and a second opening, and the positioning notch is provided at the end away from the first opening; The shell assembly further includes a limiting end plate, which is fixed to the second opening; the battery core assembly, the circuit board assembly and the supporting frame enter the interior of the shell through the first opening.

22. The battery pack according to claim 21, wherein: The support frame includes a positioning end plate, the positioning end plate abuts against an end of the battery cell assembly away from the circuit board assembly; an end of the latch slot away from the first opening abuts against the positioning end plate; The housing assembly further comprises a fastener, which sequentially fixes and connects the limiting end plate, the positioning end plate of the support frame and the latch groove.

23. The battery pack according to claim 22, wherein: The edge of the latch groove away from the first opening extends outward to form a shielding portion, and the plane where the end surface of the shielding portion away from the first opening is located coincides with the plane where the end surface of the housing away from the first opening is located.

24. The battery pack according to claim 23, wherein: The shell assembly also includes a decorative end plate, which is fixed to the second opening and abuts against the limiting end plate; the end face of the decorative end plate away from the first opening, the plane where the end face of the shielding portion away from the first opening is located, and the plane where the end face of the shell away from the first opening is located coincide with each other.

25. The battery pack according to claim 1, wherein: The battery pack includes an interface end plate, which is arranged at one end of the battery pack close to the circuit board assembly. The surface of the interface end plate is recessed inward to form a positioning space for accommodating the second discharge interface.

26. The battery pack according to claim 25, wherein: The second discharge interface includes a wire portion and an interface portion; the positioning space includes a first positioning cavity for accommodating the wire portion and a second positioning cavity for accommodating the interface portion; The first positioning cavity is bent on the interface end plate; and / or at least a portion of the second positioning cavity extends inwardly along the length direction of the battery pack.

27. The battery pack according to claim 26, wherein: The battery pack also includes a support frame for fixing the battery cell assembly, and the interface end plate serves as at least a part of the support frame; or, the battery pack also includes a shell assembly for accommodating the power management module, the battery cell assembly and the circuit board assembly, and the interface end plate serves as at least a part of the shell assembly.

28. The battery pack according to any one of claims 1 to 27, wherein: The battery cell assembly further includes a first electrode and a second electrode; The battery pack also includes a nickel sheet assembly, which includes a first connecting portion fixedly connected to the first electrode and a second connecting portion fixedly connected to the second electrode; at least portions of the first connecting portion and the second connecting portion are bent and pass through the circuit board assembly, and electrically connect the first electrode and the second electrode to the circuit board assembly.

29. The battery pack according to any one of claims 1 to 27, wherein: The circuit board assembly further includes a button circuit board, and the battery pack further includes a support frame for fixing the battery cell assembly; The button circuit board is fixed to the supporting frame and electrically connected to the first circuit board and / or the second circuit board, and is used to control the charging and discharging of the battery pack; The first circuit board and / or the second circuit board are formed as a whole and the button circuit board are arranged at two opposite ends of the battery cell assembly along the axial direction.

30. The battery pack according to claim 29, wherein: The button circuit board is provided with an indicator light, which is used to display the charging and discharging status of the battery pack and the power level of the battery core assembly.

31. The battery pack according to claim 30, wherein: The support frame includes a positioning end plate for abutting against the battery cell assembly and away from the first circuit board and the second circuit board; the button circuit board is fixed to one end of the positioning end plate away from the battery cell assembly.

32. The battery pack according to claim 31, wherein: One end of the positioning end plate away from the battery core assembly extends outward to form a plurality of positioning posts, and the plurality of positioning posts enclose a clamping space for clamping the button circuit board, and the button circuit board is fixed in the clamping space.

33. The battery pack according to any one of claims 1 to 27, wherein: The first target current is greater than the second target current.

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