Battery pack for supplying power to electronic device

Abstract

An energy storage apparatus, specifically a battery pack (100) for supplying power to an electronic device. The battery pack comprises a housing assembly (10), a battery cell module (20), at least one temperature detection apparatus (26), and a detection support (28). The housing assembly (10) is mounted to the electronic device and is supported by the electronic device. The battery cell module (20) comprises multiple battery cells (21) and a battery cell support (22) supporting the multiple battery cells (21), and the battery cell module (20) is disposed in the housing assembly (10). Multiple temperature detection apparatuses (26) are configured to detect the temperature of the battery cells (21), and the detection support (28) is configured to support the temperature detection apparatuses (26), so that the positions of the temperature detection apparatuses (26) in the housing assembly (10) are fixed. In the battery pack (100) for supplying power to an electronic device, the temperature detection apparatuses (26) are fixed in place by means of the detection support (28), thereby ensuring that the temperature detection apparatuses (26) can detect the temperature of the battery cell (21), and preventing the temperature detection apparatuses (26) from falling off.

Description

Battery packs used to power electronic devices

[0001] This application claims priority to the Chinese patent application with application number 202420048245.0 filed with the China Patent Office on January 8, 2024, priority to the Chinese patent application with application number 202410026933.1 filed with the China Patent Office on January 8, 2024, and priority to the Chinese patent application with application number 202420047906.8 filed with the China Patent Office on January 8, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to an energy storage device, and in particular to a battery pack for powering electronic devices. Background Art

[0003] Driven by the need for portability, more and more power tools are now using battery packs as a power source. These battery packs often include a temperature detection device to monitor the temperature of the battery cells. However, in one related battery pack, the temperature detection device is directly inserted into the battery cell holder or elsewhere, resulting in a loose installation.

[0004] This section provides background information related to the present application which is not necessarily related art. Summary of the Invention

[0005] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a battery pack for powering electronic devices, which improves the robustness of the temperature detection device.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] A battery pack for powering an electronic device, comprising:

[0008] a housing assembly mounted to and supported by the electronic device;

[0009] A battery cell module, comprising a plurality of battery cells and a battery cell bracket supporting the plurality of battery cells, wherein the battery cell module is disposed in the housing assembly;

[0010] at least one temperature detection device, configured to detect the temperature of the battery cell;

[0011] The detection bracket is configured to support the temperature detection device so that the position of the temperature detection device in the housing assembly is fixed.

[0012] In some embodiments, the temperature detection device is detachably fixed to the detection bracket.

[0013] In some embodiments, a fixing hole is provided on the battery cell bracket, and the detection bracket is fixed in the fixing hole.

[0014] In some embodiments, an adhesive is provided between the fixing hole and the detection bracket to fix the detection bracket in the fixing hole.

[0015] In some embodiments, the battery cell holder forms a receiving cavity for receiving the battery cell; a relief space is provided in the receiving cavity, and the relief space is communicated with the fixing hole.

[0016] In some embodiments, the battery pack further includes a coupling portion, which includes at least a terminal assembly; and a reinforcement is embedded in the coupling portion.

[0017] In some embodiments, a flexible circuit board is further included, which is arranged on the module end face of the battery module formed by the positive end faces and negative end faces of multiple battery cells; the temperature detection device is electrically coupled to the flexible circuit board through a detection power line.

[0018] In some embodiments, the detection power line is welded to the flexible circuit board by soldering.

[0019] In some embodiments, the battery pack further includes a PCB, which includes a control circuit board or a battery management circuit board; the flexible circuit board is electrically connected to the PCB using an FDC cable.

[0020] In some embodiments, the FDC cable is connected to the PCB using an ACF process.

[0021] In some embodiments, the gold fingers on the FDC cable are connected to the gold fingers on the PCB by laser welding.

[0022] In some embodiments, the battery cell module further includes a plurality of battery cell connecting pieces, each of which is connected to at least two of the battery cells, and the battery cell connecting pieces are connected to the battery cells by welding.

[0023] In some embodiments, the battery cell connecting piece includes a copper-aluminum composite connecting piece; the copper-aluminum composite connecting piece and the battery cell are laser welded; and the copper-aluminum composite connecting pieces are laser welded to each other.

[0024] In some embodiments, the copper-aluminum composite connecting sheet has different thicknesses in different welding areas.

[0025] A battery pack for powering an electronic device comprises: a housing assembly mounted to and supported by the electronic device; a cell module comprising a plurality of cells and a cell holder supporting the cells, the cell module being disposed within the housing assembly; and at least one temperature detection device configured to detect the temperature of the cells; wherein the temperature detection device is operable to be fixed to the cell holder via an external device.

[0026] In some embodiments, each of the temperature detection devices corresponds to one of the external devices; the external device is configured as a detection bracket capable of supporting the temperature detection device.

[0027] In some embodiments, the external device is configured as a bracket housing to support the temperature detection device.

[0028] In some embodiments, the external device is detachably mounted on the battery cell holder.

[0029] In some embodiments, the external device is configured as a plastic part or a metal part.

[0030] A battery pack for powering an electronic device, comprising: a shell assembly, mounted to and supported by the electronic device; a battery cell module, comprising a plurality of battery cells, the battery cell module being disposed within the shell assembly, the plurality of battery cells being capable of providing a voltage greater than or equal to 36V; a terminal assembly, connected to the plurality of battery cells, the terminal assembly being used to electrically connect the battery pack to the electronic device; wherein the interior of the shell assembly is fully sealed and isolated from the exterior of the shell assembly.

[0031] In some embodiments, at least part of the sealing structure of the housing assembly includes a glue groove, which is used to inject sealant.

[0032] In some embodiments, the sealant is a polyurethane foam sealant obtained by mixing two components.

[0033] In some embodiments, the sealant is a silicone foam sealant that is a mixture of two components.

[0034] In some embodiments, the sealant is a hot melt foam sealant.

[0035] In some embodiments, the shell assembly includes at least a barrel and an upper cover, the battery cell module is arranged in the barrel, the upper cover is arranged at the upper end of the barrel, the upper end of the barrel is provided with a gluing groove, the gluing groove is provided with sealant, and the gap between the barrel and the upper cover is sealed by the sealant.

[0036] In some embodiments, the housing assembly further includes a base, which is disposed at the lower end of the barrel, and a gap between the barrel and the base is sealed by a sealing member.

[0037] In some embodiments, the barrel and the upper cover, as well as the barrel and the base are connected via fixing members, and a gap between the fixing members and the housing assembly is sealed by a sealing member.

[0038] In some embodiments, a gap between the housing assembly and the terminal assembly is sealed by a seal.

[0039] In some embodiments, an electric display assembly is provided on the housing assembly, and a gap between the housing assembly and the electric display assembly is sealed by a sealing member.

[0040] In some embodiments, the battery cell module further includes a battery cell holder and a sealing cover, a plurality of the battery cells are arranged in the battery cell holder, a sealing sleeve is provided on one end of the battery cell facing the open side of the battery cell holder, the sealing cover is sealed on the open side of the battery cell holder, and the gap between the sealing cover and the battery cell holder is sealed by a seal.

[0041] A battery pack for powering an electronic device, comprising: a shell assembly, mounted to and supported by the electronic device; a cell module, comprising a plurality of cells, the cell module being disposed within the shell assembly, the plurality of cells being capable of providing a voltage greater than or equal to 36V; a terminal assembly, connected to the plurality of cells, the terminal assembly being used to electrically connect the battery pack to the electronic device; and a plurality of seals, the seals being configured to seal a plurality of gaps in the shell assembly that are communicable with the outside world, so that the sealing grade of the sealed shell assembly is greater than or equal to IP6IPX2.

[0042] A battery pack for powering an electronic device includes a shell assembly mounted to and supported by the electronic device; a cell module including a plurality of cells, the cell module being disposed within the shell assembly, the cells being capable of providing a voltage greater than or equal to 36V; a terminal assembly connected to the cells, the terminal assembly being used to electrically connect the battery pack to the electronic device; a plurality of fixing members configured to at least fix the shell assembly; and a sealing member configured to at least seal a gap between the fixing members and the shell assembly.

[0043] A battery pack for powering an electronic device comprises: a housing assembly mounted to and supported by the electronic device; a battery cell module comprising a plurality of battery cells, the battery cell module being disposed within the housing assembly, the plurality of battery cells being capable of providing a voltage greater than or equal to 36V; a flexible circuit board disposed on a module end face of the battery cell module formed by the positive and negative end faces of the plurality of battery cells; and a reinforcing member affixed to at least a portion of the flexible circuit board to enhance the strength of the flexible circuit board.

[0044] In some embodiments, the battery cell module further includes a plurality of battery cell connecting pieces, each of which is connected to at least two of the battery cells, and the flexible circuit board is connected to the battery cell connecting pieces by welding.

[0045] In some embodiments, a solder pad is provided on the flexible circuit board, and the solder pad is connected to the battery cell connecting piece by welding.

[0046] In some embodiments, a welding groove is provided on the battery cell connecting piece, and a through hole is provided on the welding pad, and the welding material can flow into the welding groove through the through hole.

[0047] In some embodiments, the reinforcing member is located between the battery cell connecting piece and the flexible circuit board.

[0048] In some embodiments, a avoidance area for avoiding the welding pad is provided on the reinforcing piece.

[0049] In some embodiments, a backing adhesive is provided on the soldering pad, and the soldering pad is connected to the battery cell connecting piece through the backing adhesive.

[0050] In some embodiments, an edge of the reinforcing piece is provided with adhesive, and the reinforcing piece is connected to the battery cell holder via the adhesive.

[0051] In some embodiments, the flexible circuit board is provided with adhesive backing, and the flexible circuit board is connected to the reinforcing member through the adhesive backing.

[0052] In some embodiments, a temperature detection device is further included, and the temperature detection device is coupled to the flexible circuit board via a detection power line, and the detection power line is connected to the flexible circuit board by welding.

[0053] A battery pack for powering an electronic device comprises: a housing assembly mounted to and supported by the electronic device; a battery cell module comprising a plurality of battery cells, the battery cell module being disposed within the housing assembly, the plurality of battery cells being capable of providing a voltage greater than or equal to 36V; and a flexible circuit board disposed on an end face of the battery cell module formed by the positive and negative end faces of the plurality of battery cells; the flexible circuit board including an FDC cable.

[0054] A battery pack for powering an electronic device comprises: a housing assembly mounted to and supported by the electronic device; a battery cell module comprising a plurality of battery cells, the battery cell module being disposed within the housing assembly, the plurality of battery cells being capable of providing a voltage greater than or equal to 36V; an FDC cable disposed on an end face of the battery cell module formed by the positive and negative end faces of the plurality of battery cells; and a temperature detection device coupled to the FDC cable via a detection power line.

[0055] A battery pack for powering an electronic device comprises: a shell assembly mounted to and supported by the electronic device; a battery cell module comprising a plurality of battery cells, the battery cell module being disposed within the shell assembly, the plurality of battery cells being capable of providing a voltage greater than or equal to 36V; a flexible circuit board disposed on a module end face of the battery cell module formed by positive and negative terminal faces of the plurality of battery cells; the battery cell module further comprising a plurality of battery cell connecting pieces, each of the battery cell connecting pieces being connected to at least two of the battery cells, the flexible circuit board being connected to the battery cell connecting pieces by welding; solder pads being disposed on the battery cell connecting pieces, and heat dissipation space being disposed in at least a portion of an area adjacent to the solder pads.

[0056] A battery pack for powering an electronic device comprises: a housing assembly mounted to and supported by the electronic device; a cell module comprising a plurality of cells, the cell module being disposed within the housing assembly, the cells being capable of providing a voltage of 36V or greater; and a flexible circuit board disposed on an end face of the cell module formed by the positive and negative end faces of the cells. The flexible circuit board comprises FDC cables, at least some of which have different wire diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] FIG1 is a schematic structural diagram of a battery pack provided by an embodiment of the present application from a first perspective;

[0058] FIG2 is a schematic structural diagram of a battery pack according to an embodiment of the present application from a second perspective;

[0059] FIG3 is a schematic diagram of the exploded structure of the housing assembly and handle of the battery pack provided in an embodiment of the present application;

[0060] FIG4 is a schematic diagram of the exploded structure of the barrel and the base involved in the embodiment of the present application;

[0061] FIG5 is a cross-sectional view of the barrel involved in an embodiment of the present application;

[0062] FIG6 is a schematic diagram of the exploded structure of the electronic display assembly involved in the embodiment of the present application;

[0063] FIG7 is a first schematic diagram of the exploded structure of the battery cell module involved in an embodiment of the present application;

[0064] FIG8 is a second schematic diagram of the exploded structure of the battery cell module involved in an embodiment of the present application;

[0065] FIG9 is a schematic structural diagram of a flexible circuit board and a temperature detection device according to an embodiment of the present application;

[0066] FIG10 is a schematic structural diagram of a cell connecting piece according to an embodiment of the present application;

[0067] FIG11 is a schematic structural diagram of a pad on a flexible circuit board according to an embodiment of the present application;

[0068] FIG12 is a schematic structural diagram of the back side of a reinforcing member according to an embodiment of the present application;

[0069] FIG13 is a schematic structural diagram of a cell support according to an embodiment of the present application;

[0070] FIG14 is a partial enlarged view of point A in FIG13;

[0071] FIG15 is a schematic structural diagram of a temperature detection device and a detection bracket involved in an embodiment of the present application;

[0072] FIG16 is a schematic structural diagram of a power line within a housing assembly according to an embodiment of the present application;

[0073] FIG17 is a schematic diagram of an FDC cable according to an embodiment of the present application;

[0074] FIG18 is a schematic diagram of the connection of a single-section detection line according to an embodiment of the present application;

[0075] In the figure: 100, battery pack; 10, housing assembly; 11, barrel; 111, coupling groove; 1111, side groove wall; 1111a, mounting rail; 112, reinforcement member; 113, glue groove; 12, upper cover; 121, receiving groove; 13, base; 20, battery cell module; 21, battery cell; 22, battery cell bracket; 221, receiving cavity; 222, fixing hole; 23. Cell connector; 231. Soldering slot; 2311. Heat dissipation space; 232. Detection connection; 24. Reinforcement member; 241. Avoidance area; 242. First adhesive strip; 25. Flexible circuit board; 251. Solder pad; 2511. Through hole; 2512. Second adhesive strip; 252. FDC cable; 2521. Thin FDC cable; 26. Temperature detection device; 27. Detection power cord; 28. Detection bracket; 29. ​​Power cord; 210. Power cord bracket; 211. Single-section detection cable; 30. Terminal assembly; 40. Handle; 51. Pin; 52. Elastic return member; 53. Damping member; 60. Display assembly; 61. Transparent member; 62. Lampshade assembly; 63. Switch; 64. Adapter; 65. Spring; 71. First sealing member; 72. Second sealing member; 73. Fourth sealing member; 74. Fifth sealing member; 81. First fixing member; 82. Second fixing member. DETAILED DESCRIPTION

[0076] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0077] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0078] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0079] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0080] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0081] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0082] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0083] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. Where a unit "controller," "processor," "central processing unit," "CPU," or "MCU" is used to perform a particular function, unless otherwise specified, the function may be performed by a single unit or multiple units.

[0084] In this application, the terms "device", "module" or "unit" can be implemented in the form of hardware or software to achieve specific functions.

[0085] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0086] As shown in Figures 1 to 16, the present application provides a battery pack 100, which is an energy storage device capable of storing electrical energy to power electronic devices. In this embodiment, the electronic device may include a large outdoor walking device, such as a riding lawn mower or snow blower. The electronic device may also include an energy conversion device, such as an adapter or inverter, to convert the electrical energy output by the battery pack 100 to power other power tools, such as a power drill, a pruner, or a sander. Alternatively, the power tool may be a bench tool, such as a table saw or a miter saw. Alternatively, the power tool may be a push power tool, such as a push lawn mower or a push snow blower. Alternatively, the power tool may be a ride-on power tool, such as a riding lawn mower, a ride-on vehicle, or an all-terrain vehicle. Alternatively, the power tool may be a robotic tool, such as a lawn mower or a snow blower. In some embodiments, the power tool may be an electric drill, an electric light, or an electric vehicle. In some embodiments, the power tool may be a garden tool, such as a pruner, a blower, a lawn mower, or a chainsaw. Alternatively, the power tool may also be a decoration tool, such as a screwdriver, a nail gun, a circular saw, a sander, etc. In some embodiments, the power tool may also be a vegetation care tool, such as a lawn mower, a lawn mower, a pruner, a chain saw, etc. Alternatively, the power tool may also be a cleaning tool, such as a hair dryer, a snow blower, a cleaning machine, etc. Alternatively, the power tool may also be a drilling tool, such as a drill, a screwdriver, a wrench, an electric hammer, etc. Alternatively, the power tool may also be a sawing tool, such as a reciprocating saw, a jig saw, a circular saw, etc. Alternatively, the power tool may also be a bench tool, such as a table saw, a miter saw, a metal cutter, an electric milling machine, etc. Alternatively, the power tool may also be a grinding tool, such as an angle grinder, a sander, etc. Alternatively, the power tool may also be other tools, such as a lamp, a fan, etc.

[0087] In one embodiment, the nominal voltage or rated voltage of the battery pack 100 is greater than or equal to 56V, or greater than or equal to 50V, or greater than or equal to 48V, or greater than or equal to 40V, or greater than or equal to 36V, or greater than or equal to 30V, or greater than or equal to 20V, or greater than or equal to 10V, etc.

[0088] The battery pack 100 includes a shell assembly 10, a cell module 20 and a terminal assembly 30. The shell assembly 10 forms the main body of the battery pack 100, and the shell assembly 10 is basically in the shape of a rectangular parallelepiped. The shell assembly 10 forms a storage space for accommodating the cell module 20. In one embodiment, referring to Figures 1 to 3, the shell assembly 10 may include an upper cover 12, a barrel 11 and a base 13, and the three can constitute a basically closed storage space. Of course, the shell assembly 10 may also include left and right shells, or upper and lower shells or other assembled forms of shells. A terminal assembly 30 is installed on the shell assembly 10, and the terminal assembly 30 is connected to the cell module 20. The battery pack 100 is electrically connected to the electronic device through the terminal assembly 30 to power the electronic device. In other embodiments, wheels can be detachably provided under the shell assembly 10, and the wheels support the shell assembly 10 so that the user can move the battery pack 100 more effortlessly.

[0089] In order to facilitate the user's operation, a handle 40 can also be provided on the shell assembly 10 to facilitate the user to lift the battery pack 100. In one embodiment, the handle 40 can be integrally formed with the shell assembly 10. In one embodiment, with continued reference to Figures 1 to 3, the handle 40 is detachably mounted on one surface of the shell assembly 10. For example, the upper surface of the shell assembly 10 is recessed inward to form a receiving groove 121. The handle 40 can be fixed to the groove wall of the receiving groove 121 by a pin 51 and can be rotated about 180° on the shell assembly 10 around the pin 51. In other words, when the handle 40 is not being lifted for use, it can be stored in the receiving groove 121, which can reduce the size of the battery pack 100 so that the battery pack 100 can be placed in an electronic device. Of course, other storage portions formed or installed on the shell assembly 10 for accommodating the handle 40 without increasing the volume of the battery pack 100 are also within the protection scope of this embodiment. In one embodiment, referring to FIG3 , an elastic return member 52 may be further provided at the connection between the handle 40 and the housing assembly 10. When the handle 40 is not pulled, the elastic return member 52 may return the handle 40 to the accommodating groove 121. In one implementation, the elastic return member 52 may be a torsion spring. In one embodiment, a damping member 53 is further provided on the handle 40 to increase the damping feeling and allow the handle 40 to return slowly. In this embodiment, the damping member 53 may be a rubber column. The damping member 53 can generate friction damping with the upper cover 12 during the resetting process of the handle 40 through an interference fit with the upper cover 12, thereby preventing the handle 14 from returning to its original position.

[0090] To improve the sealing performance of the housing assembly 10, the interior of the housing assembly 10 is fully sealed from the exterior of the housing assembly 10. The so-called fully sealed structure can be understood as meaning that the accommodation space formed by the housing assembly 10 is a closed space. In some embodiments, at least part of the sealing structure of the housing assembly 10 includes a glue groove 113, which is used to inject sealant. For example, as shown in Figure 16, the upper end of the barrel 11 is provided with a glue groove 113, which is injected with sealant, and the gap between the barrel 11 and the upper cover 12 is sealed by the sealant. When pouring sealant into the glue groove 113, a polyurethane foam sealant process can be used. Specifically, a two-component glue dispensing system is used to mix the A and B components of the polyurethane foam glue, and then the mixture is dispensed into the glue groove 113 to be sealed. After the two components of glue start to react and foam, the glue groove 113 is foamed and filled, and then the upper cover 12 and the barrel 11 are locked and assembled to achieve a sealing and waterproof gap between the upper cover 12 and the barrel 11. Alternatively, a silicone foam sealant process can be used. Specifically, a two-component glue dispensing system is used to mix the A and B components of the silicone foam glue, and then the mixture is dispensed into the glue groove 113 to be sealed. After the two components of glue start to react and foam, the glue groove 113 is foamed and filled, and then the upper cover 12 and the barrel 11 are locked and assembled to achieve a sealing and waterproof gap between the upper cover 12 and the barrel 11. Alternatively, a single-component silicone sealing process can be used, such as using a single-component dealcoholized vulcanized silicone sealant using the FIPG process. Alternatively, a hot melt foaming sealant process can be used. Specifically, a hot melt glue gun is used to apply non-reactive hot melt foaming glue to the glue groove 113 that needs to be sealed. After the hot melt glue cools, it begins to foam, and the glue groove 113 is foamed and filled. The upper cover 12 and the barrel 11 are then locked and assembled to ensure that the gap between the upper cover 12 and the barrel 11 is sealed and waterproof. The above-mentioned sealing material or sealing process can also be used in any other place in the battery pack 100 that needs to be sealed, which will not be listed here one by one.

[0091] In some embodiments, multiple gaps of the housing assembly 10 that can communicate with the outside are sealed by multiple sealing members, so that the sealing level of the sealed housing assembly 10 is greater than or equal to IPX2.

[0092] As shown in Figure 1, the barrel 11 and upper cover 12 are locked together using a first fixing member 81. The first fixing member 81 is a screw. The barrel 11 is provided with a first threaded hole, and the upper cover 12 is provided with a first through-hole. The screw passes through the first through-hole and is threadedly connected to the first threaded hole. A gap exists between the screw and the upper cover 12. To ensure the sealing of the housing assembly 10, a first sealing member 71 is used to seal the gap between the screw and the upper cover 12 (see Figure 1). The first sealing member 71 can be a sealing plug, which seals the first through-hole.

[0093] As shown in Figure 4, the barrel 11 and the base 13 are locked and assembled by a second fixing member 82. The second fixing member 82 is a screw. The barrel 11 is provided with a second threaded hole, and the base 13 is provided with a second through hole. The screw passes through the second through hole and is threadedly connected to the second threaded hole. There is a gap between the base 13 and the barrel 11. Therefore, to ensure the sealing of the housing assembly 10, a second sealing member 72 is used to seal the gap between the base 13 and the barrel 11. The second sealing member 72 here can be a sealing gasket, which is arranged between the barrel 11 and the base 13. The second sealing member 72 can be arranged around the screw, as shown in Figure 4. In addition, there is also a gap between the screw and the base 13. To ensure the sealing of the housing assembly 10, a third sealing member is used to seal the gap between the screw and the base 13. The third sealing member here can be a sealing plug, which is sealed in the second through hole.

[0094] At least one side of the housing assembly 10 is provided with a coupling portion for coupling with an electronic device. The coupling portion includes at least a terminal assembly 30. In one embodiment, referring to Figures 1 and 4-5, the side of the housing assembly 10 has a coupling recess 111 shaped like an inverted U. This recess 111 includes two opposing side walls 1111 and a top wall. The opening of the coupling recess 111 faces the bottom of the battery pack 100. At least one side wall 1111 of the coupling recess 111 is recessed inward to form a mounting track 1111a, which guides the battery pack 100 when it is installed in the electronic device. The terminal assembly 30 is mounted at the top of the coupling recess 111. In one embodiment, the top of the housing assembly 10 is provided with a terminal mounting hole, through which the terminal assembly 30 can be mounted to the housing assembly 10. One end of the terminal assembly 30 can be positioned within the housing assembly 10, while the other end is exposed outside the housing assembly 10. This creates a mounting gap between the terminal assembly 30 and the housing assembly 10. Referring to Figure 7, a fourth seal 73 can be used to seal the gap between the terminal assembly 30 and the housing assembly 10. The fourth seal 73 here can be at least one of a sealant, a sealing ring, or a sealing sponge. In one embodiment, referring to Figure 5, two side groove walls 1111 of the coupling groove 111 are embedded with reinforcements 112 to increase the strength of the side groove walls 1111. In one embodiment, the material of the coupling portion is PC+ABS, and the material of the reinforcement 112 is PP+foaming agent. PC+ABS is easy to shrink and deform, which is not conducive to positioning in the mold, while PP is not easy to deform and shrink, which is convenient for positioning in the mold.

[0095] 1 to 3 , the battery pack 100 further includes an electronic display assembly 60, which is disposed on the housing assembly 10. Referring to FIG6 , the electronic display assembly 60 includes a transparent member 61, a lampshade assembly 62, a switch 63, an adapter 64, and a spring 65. The transparent member 61 is disposed at the upper end of the lampshade assembly 62, and the switch 63 is disposed at the lower end of the lampshade assembly 62. The transparent member 61 is made of a soft rubber material, and pressing the transparent member 61 can cause the member to deform, thereby triggering the switch 63. Because the distance between the deformation area of ​​the transparent member 61 and the switch 63 is too far, if the transparent member 61 is directly designed to contact the switch 63, the transparent member 61 is easily deformed and skewed. Therefore, an adapter 64 and a spring 65 are added between the transparent member 61 and the switch 63 to enable the transparent member 61 to press the switch 63 through the adapter 64 and the spring 65. There is a gap between the housing assembly 10 and the electronic display assembly 60. To ensure the sealing of the housing assembly 10, the gap between the housing assembly 10 and the electronic display assembly 60 is sealed by a fifth sealing member 74. The fifth sealing member 74 can be a sealing ring, which is provided between the housing assembly 10 and the transparent member 61.

[0096] 7 , the battery module 20 includes a plurality of battery cells 21, a battery cell holder 22 and a sealing cover. The plurality of battery cells 21 are arranged in the battery cell holder 22. The plurality of battery cells 21 can provide a voltage greater than or equal to 36V, and the sealing cover is sealed on the open side of the battery cell holder 22. In this embodiment, the plurality of battery cells 21 can be lithium iron phosphate batteries. In one embodiment, the battery cell 21 can also be a manganese phosphate ion battery cell 21 or a sodium ion battery cell 21. In one embodiment, the battery cell holder 22 can be composed of two substantially symmetrical, detachable sub-holders, and the two sub-holders can be fixed by screws. In order to ensure the sealing of the battery cell module 20, a sealing sleeve is provided on one end of the battery cell 21 facing the open side of the battery cell holder 22, and the gap between the sealing cover and the battery cell holder 22 is sealed by a sixth seal.

[0097] Referring to Figure 8 , the battery module 20 also includes multiple battery cell connectors 23 . Each battery cell connector 23 can electrically connect at least two battery cells 21 . The battery cell connectors 23 are connected to the battery cells 21 by welding. In one embodiment, a group of battery cells 21 connected by the battery cell connectors 23 is referred to as a battery cell. Each battery cell can have two sets of battery cell connectors 23 : one set of positive battery cell connectors 23 and one set of negative battery cell connectors 23 . The positive battery cell connectors 23 are connected to the positive electrode of each battery cell 21 in the battery cell, and the negative battery cell connectors 23 are connected to the negative electrode of each battery cell 21 in the battery cell. The positive battery cell connectors 23 form the positive end face of the battery module 20, and the negative battery cell connectors 23 form the negative end face of the battery module 20. Referring to Figures 7 and 8 , both the positive and negative end faces are provided with flexible circuit boards 25 . In one embodiment, the flexible circuit boards 25 are connected to the battery cell connectors 23 by welding. In one embodiment, as shown in FIG9 , a soldering pad 251 is provided on the flexible circuit board 25, and the soldering pad 251 is connected to the cell connection piece 23 by welding. In one embodiment, as shown in FIG10 , a soldering groove 231 is provided on the cell connection piece 23, and a through-hole 2511 is provided on the soldering pad 251, through which soldering material can flow into the soldering groove 231. In one embodiment, the through-hole 2511 can be a plurality of small holes, as shown in FIG11 , or a larger through-hole, as shown in FIG17 , to ensure that the soldering material flows into the soldering groove 231 more quickly. In one embodiment, to prevent the flexible circuit board 25 from shifting during the soldering process with the cell connection piece 23, a first adhesive backing 242 is provided on the soldering pad 251. Referring to FIG11 , the soldering pad 251 is first connected to the cell connection piece 23 via the first adhesive backing 242, and then the soldering pad 251 is soldered to the cell connection piece 23.

[0098] In one embodiment, a heat dissipation space 2311 is provided around at least a portion of the periphery of the soldering groove 231. This heat dissipation space 2311 allows heat to be dissipated when the solder pad 251 is soldered to the soldering groove 231, thereby preventing cold solder joints caused by excessive soldering temperatures. It is understood that the heat dissipation space 2311 can be a continuous hollowed-out area at one end, or it can be a plurality of discontinuous hollowed-out areas surrounding the soldering groove 231, and this is not limited here.

[0099] In one embodiment, the cell connecting piece 23 includes a copper-aluminum composite connecting piece, and the copper-aluminum composite connecting piece is laser welded to the cell 21; the copper-aluminum composite connecting pieces are laser welded to each other. The thickness of the copper-aluminum composite connecting piece varies in different welding areas. For example, a 0.6mm copper-aluminum composite connecting piece is laser welded to the pole of the cell 21, wherein the thickness of the copper layer and the aluminum layer in the copper-aluminum composite connecting piece can be 0.1mm and 0.5mm, respectively, and the pole of the cell 21 can be composed of about 2mm of aluminum. Another example: a 0.6mm copper-aluminum composite connecting piece composed of a 0.1mm copper layer and a 0.5mm aluminum layer is laser welded to a 3mm copper-aluminum composite connecting piece, or at least the welding surface is 3mm of aluminum. In one embodiment, the cell connecting piece 23 can also be a copper-steel composite connecting piece. It is understandable that the thickness of the cell connecting piece 23 or the thickness of the different materials that make up the cell connecting piece 23 can be adjusted according to actual needs and will not be listed here one by one.

[0100] 7 and 8 , the battery pack 100 further includes a reinforcing member 24, which at least partially fits the flexible circuit board 25 to enhance the strength of the flexible circuit board 25 and facilitate installation. In one embodiment, the reinforcing member 24 is located between the battery cell connecting piece 23 and the flexible circuit board 25. The reinforcing member 24 is provided with an escape area 241 for avoiding the solder pad 251. In one embodiment, referring to FIG12 , a second adhesive backing 2512 is provided on the edge of the reinforcing member 24, and the reinforcing member 24 is connected to the battery cell holder 22 via the second adhesive backing 2512. A third adhesive backing is also provided on the flexible circuit board 25, and the flexible circuit board 25 is connected to the reinforcing member 24 via the third adhesive backing. In one embodiment, the reinforcing member 24 may be a hard plastic member or a hard thin plate of other materials.

[0101] 9 and 13 to 15 , the battery pack 100 further includes a temperature detection device 26 , which is configured to detect the temperature of the battery cells 21 . The temperature detection device 26 is coupled to the flexible circuit board 25 via a detection power cable 27 , which is soldered to the flexible circuit board 25 . To prevent the temperature detection device 26 from falling off, the battery pack 100 further includes a detection bracket 28 , which is configured to support the temperature detection device 26 and secure it within the housing assembly 10 .

[0102] In one embodiment, the detection bracket 28 can also be configured as a bracket housing. The bracket housing is configured to accommodate or support the temperature detection device 26. In one embodiment, the bracket housing can be a plastic shell or at least partially composed of plastic. In one embodiment, the bracket housing is made of a material with good thermal conductivity, such as metal, so as to effectively transfer the temperature of the battery cell 21 to the temperature detection device 26.

[0103] In one embodiment, the battery cell holder 22 is provided with a fixing hole 222, and the detection bracket 28 is fixed in the fixing hole 222. In one embodiment, an adhesive is provided between the fixing hole 222 and the detection bracket 28 to secure the detection bracket 28 in the fixing hole 222. In one embodiment, the adhesive is thermally conductive adhesive. Before placing the detection bracket 28 in the fixing hole 222, the thermally conductive adhesive is first applied to the fixing hole 222, and then the detection bracket 28 is placed in the fixing hole 222. After the thermally conductive adhesive cures, the detection bracket 28 can be secured. In one embodiment, the battery cell holder 22 forms a receiving cavity 221 for accommodating the battery cell 21. A relief is provided in the receiving cavity 221, and the relief is connected to the fixing hole 222 so that the temperature detection device 26 can detect the temperature of the battery cell 21 through the relief. By providing the detection bracket 28 to secure the temperature detection device 26, it is ensured that the temperature detection device 26 can detect the temperature of the battery cell 21 and can prevent the temperature detection device 26 from falling off. In one embodiment, the temperature detection device 26 is detachably fixed to the detection bracket 28 to facilitate maintenance and other operations on the temperature detection device 26 .

[0104] The battery pack 100 also includes a PCB board, which includes a control circuit board or a battery management circuit board; the flexible circuit board 25 can be an FDC cable 252 and / or an FFC cable. The FDC cable 252 can be electrically connected to the PCB board. In one embodiment, the FDC cable 252 is connected to the PCB board using an ACF process. Specifically, the ACF conductive adhesive is pressed using a hot pressing device to achieve an electrical connection between the PCB board and the FDC cable. In one embodiment, the gold fingers on the FDC cable 252 are connected to the gold fingers on the PCB board by laser welding. Specifically, the laser welding equipment is used to melt the solder paste, solder wire, and solder ball between the gold fingers on the PCB board and the gold fingers on the FDC cable 252, thereby achieving an electrical connection between the PCB board and the FDC cable 252.

[0105] 16 , the battery pack 100 includes a power cord 29 , wherein the thinner power cord 29 is fixed with a wire groove. As for the thicker power cord 29 , since the wire diameter is larger, a wire groove cannot be made. Therefore, a power cord holder 210 or a cable tie can be used to fix the thicker power cord 29 to the battery cell holder 22 .

[0106] Referring to Figure 17 , at least some FDC cables 252 have different wire diameters, meaning the thickness of the FDC cables 252 can vary. In this embodiment, the relatively thin FDC cables 2521 can function as fuses. If excessive current flows through the battery cell 21 to which they are connected, the thin FDC cables 2521 will fuse, thereby protecting the battery cell 21 or the electronic components within the battery pack 100. In one embodiment, the thin FDC cables 2521 can be located near the solder pads 251 or anywhere else along the FDC cables 252.

[0107] Referring to Figure 18, the battery cell module 20 may also include a plurality of single-section detection lines 211, which are configured to detect electrical parameters of the battery cell 21, such as the voltage or current of the battery cell 21. The single-section detection line 211 is electrically coupled to the battery cell connecting piece 23. Specifically, the detection connection portion 232 of the battery cell connecting piece 23 can be electrically coupled to the single-section detection line 211. In one embodiment, the single-section detection line 211 may be a copper wire, and laser welding may be used to fix the single-section copper wire detection line to the battery cell connecting piece 23 using a laser beam as a heat source. In one embodiment, the single-section detection line 211 may be an aluminum wire, and ultrasonic welding technology may be used to fix the aluminum wire to the battery cell connecting piece 23. In one embodiment, resistance welding or UV conductive adhesive may also be used to fix the single-section detection line 211 to the battery cell connecting piece 23.

[0108] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A battery pack for powering an electronic device, comprising: A housing assembly, mounted to the electronic device and supported by the electronic device; A battery cell module, including a plurality of battery cells and a battery cell support for supporting the plurality of battery cells, the battery cell module being disposed within the housing assembly; At least one temperature detection device, configured to detect the temperature of the battery cells; Further comprising: A detection bracket, configured to support the temperature detection device such that the position of the temperature detection device within the housing assembly is fixed.

2. The battery pack for powering an electronic device according to claim 1, wherein, The temperature detection device is removably fixed to the detection bracket.

3. The battery pack for powering an electronic device according to claim 1, wherein, The battery cell support is provided with fixing holes, and the detection bracket is fixed within the fixing holes.

4. The battery pack for powering an electronic device according to claim 3, wherein, An adhesive is provided between the fixing holes and the detection bracket to fix the detection bracket within the fixing holes.

5. The battery pack for powering an electronic device according to claim 3, wherein, The battery cell support forms a receiving cavity for receiving the battery cells; an avoidance portion is provided within the receiving cavity, and the avoidance portion communicates with the fixing holes.

6. The battery pack for powering an electronic device according to claim 1, further comprising a coupling portion, the coupling portion at least including a terminal assembly; a reinforcing member is embedded within the coupling portion.

7. The battery pack for powering an electronic device according to claim 1, further comprising a flexible circuit board, the flexible circuit board being disposed on a module end face of the battery cell module formed by the positive and negative end faces of the plurality of battery cells; the temperature detection device is electrically coupled to the flexible circuit board through a detection power line.

8. The battery pack for powering an electronic device according to claim 7, wherein, The detection power line is soldered to the flexible circuit board.

9. The battery pack for powering an electronic device according to claim 7, further comprising a PCB board, the PCB board including a control circuit board or a battery management circuit board; the flexible circuit board includes an FDC cable, and the FDC cable is electrically connected to the PCB board.

10. The battery pack for powering an electronic device according to claim 9, wherein, The FDC cable is connected to the PCB board by an ACF process.

11. The battery pack for powering an electronic device according to claim 9, wherein, The gold fingers on the FDC cable are connected to the gold fingers on the PCB board by laser welding.

12. The battery pack for powering an electronic device according to claim 1, wherein, The battery cell module further includes a plurality of battery cell connection sheets, each battery cell connection sheet connecting at least two of the battery cells, and the battery cell connection sheets are connected to the battery cells by welding.

13. The battery pack for powering an electronic device according to claim 12, wherein, The battery cell connection sheets include copper-aluminum composite connection sheets; the copper-aluminum composite connection sheets are laser welded to the battery cells; the copper-aluminum composite connection sheets are laser welded to each other.

14. The battery pack for powering an electronic device according to claim 13, wherein, The thicknesses of different welding regions of the copper-aluminum composite connection sheets are different.

15. The battery pack for powering an electronic device according to claim 1 further comprises: A plurality of seals, the seals being configured to seal a plurality of gaps of the housing assembly that can communicate with the outside, such that the sealing grade of the sealed housing assembly is greater than or equal to IPX2.

16. A battery pack for powering an electronic device, comprising: A housing assembly, mounted to the electronic device and supported by the electronic device; A battery cell module, including a plurality of battery cells and a battery cell support for supporting the plurality of battery cells, the battery cell module being disposed within the housing assembly; At least one temperature detection device, configured to detect the temperature of the battery cells; Wherein, The temperature detection device is operably fixed to the battery cell support by an external device.

17. The battery pack for powering an electronic device according to claim 16, wherein, Each of the temperature detection devices corresponds to one of the external devices; the external device is set as a detection bracket capable of supporting the temperature detection device.

18. The battery pack for powering an electronic device according to claim 16, wherein, The external device is set as a bracket housing to support the temperature detection device.

19. The battery pack for powering an electronic device according to claim 16, wherein, The external device is detachably mounted on the cell bracket.

20. The battery pack for powering an electronic device according to claim 16, wherein, The external device is set as a plastic part or a metal part.

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