Battery pack for supplying power to electronic equipment

Abstract

The invention discloses an energy storage device, and particularly discloses a battery pack for supplying power to electronic equipment, the battery pack comprises a shell assembly, a battery cell module, at least one temperature detection device and a detection support, the shell assembly is installed on the electronic equipment and is supported by the electronic equipment; the battery cell module comprises a plurality of battery cells and a battery cell bracket for supporting the plurality of battery cells, and the battery cell module is arranged in the shell assembly; the plurality of temperature detection devices are arranged to detect the temperature of the battery cell; the detection support is arranged to support the temperature detection device so that the position of the temperature detection device in the shell assembly can be fixed. According to the battery pack for supplying power to the electronic equipment, the temperature detection device is fixed through the detection support, it can be ensured that the temperature detection device can detect the temperature of the battery cell, and the temperature detection device can be prevented from falling off.

Description

Technical Field

[0001] This application relates to an energy storage device, and more particularly to a battery pack for powering an electronic device. Background Art

[0002] Based on the usage requirements of portability, more and more current power tools use battery packs as the power source. Each battery pack includes a temperature detection device for detecting the temperature of the battery cells. In a related battery pack, the temperature detection device is directly inserted into the battery cell holder or other positions, and the temperature detection device is not firmly installed.

[0003] This section provides background information related to this application, and these background information are not necessarily prior art. Summary of the Invention

[0004] An object of this application is to solve or at least mitigate part or all of the above problems. To this end, an object of this application is to provide a battery pack for powering an electronic device, which improves the firmness of the temperature detection device.

[0005] To achieve the above object, this application adopts the following technical solutions:

[0006] A battery pack for powering an electronic device, comprising:

[0007] A housing assembly, mounted to the electronic device and supported by the electronic device;

[0008] A battery cell module, including a plurality of battery cells and a battery cell holder for supporting the plurality of battery cells, the battery cell module being disposed within the housing assembly;

[0009] At least one temperature detection device, configured to detect the temperature of the battery cells;

[0010] A detection bracket, configured to support the temperature detection device so that the position of the temperature detection device within the housing assembly is fixed.

[0011] In some embodiments, the temperature detection device is removably fixed to the detection bracket.

[0012] In some embodiments, fixing holes are provided on the battery cell holder, and the detection bracket is fixed within the fixing holes.

[0013] In some embodiments, an adhesive is provided between the fixing holes and the detection bracket to fix the detection bracket within the fixing holes.

[0014] In some embodiments, the battery cell holder 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.

[0015] In some embodiments, the battery pack further includes a joint portion, and the joint portion at least includes a terminal assembly; a reinforcing member is embedded in the joint portion.

[0016] In some embodiments, a flexible printed circuit board is further included, and the flexible printed circuit board is disposed on the module end face formed by the positive end faces and negative end faces of multiple battery cells in the battery cell module; the temperature detection device is electrically coupled to the flexible printed circuit board through a detection power line.

[0017] In some embodiments, the detection power line and the flexible printed circuit board are soldered together.

[0018] In some embodiments, the battery pack further includes a PCB board, and the PCB board includes a control circuit board or a battery management circuit board; the flexible printed circuit board is electrically connected to the PCB board by an FDC cable.

[0019] In some embodiments, the FDC cable and the PCB board are connected by an ACF process.

[0020] In some embodiments, the gold fingers on the FDC cable and the gold fingers on the PCB board are connected by laser welding.

[0021] In some embodiments, 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 sheet and the battery cells are connected by welding.

[0022] In some embodiments, the battery cell connection sheet includes a copper-aluminum composite connection sheet; the copper-aluminum composite connection sheet and the battery cells are connected by laser welding; the copper-aluminum composite connection sheets are connected by laser welding.

[0023] In some embodiments, the thicknesses of different welding regions of the copper-aluminum composite connection sheet are different.

[0024] The advantages of the present application are as follows:

[0025] The battery pack provided by the present application for powering an electronic device can fix the temperature detection device through a detection bracket, which can ensure that the temperature detection device can detect the temperature of the battery cells and can prevent the temperature detection device from falling off. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the battery pack provided by the embodiment of the present application from a first perspective;

[0027] Figure 2 is a schematic structural diagram of the battery pack provided by the embodiment of the present application from a second perspective;

[0028] Figure 3 It is a schematic exploded view of the housing assembly and the handle of the battery pack provided by an embodiment of the present application;

[0029] Figure 4 It is a schematic exploded view of the barrel and the base involved in an embodiment of the present application;

[0030] Figure 5 It is a cross-sectional view of the barrel involved in an embodiment of the present application;

[0031] Figure 6 It is a schematic exploded view of the electronic display component involved in an embodiment of the present application;

[0032] Figure 7 It is a schematic exploded view of the battery cell module involved in an embodiment of the present application Figure 1 ;

[0033] Figure 8 It is a schematic exploded view of the battery cell module involved in an embodiment of the present application Figure 2 ;

[0034] Figure 9 It is a schematic diagram of the flexible printed circuit board and the temperature detection device involved in an embodiment of the present application;

[0035] Figure 10 It is a schematic diagram of the battery cell connecting piece involved in an embodiment of the present application;

[0036] Figure 11 It is a schematic diagram of the pads on the flexible printed circuit board involved in an embodiment of the present application;

[0037] Figure 12 It is a schematic diagram of the back side of the reinforcement piece involved in an embodiment of the present application;

[0038] Figure 13 It is a schematic diagram of the battery cell bracket involved in an embodiment of the present application;

[0039] Figure 14 It is Figure 13 The partial enlarged view at A in;

[0040] Figure 15 It is a schematic diagram of the temperature detection device and the detection bracket involved in an embodiment of the present application;

[0041] Figure 16 It is a schematic diagram of the power line inside the housing assembly involved in an embodiment of the present application;

[0042] Figure 17 It is a schematic diagram of the FDC cable involved in an embodiment of the present application;

[0043] Figure 18 It is a schematic connection diagram of a single - section detection line involved in an embodiment of the present application.

[0044] In the figure:

[0045] 100, battery pack;

[0046] 10, housing assembly; 11, barrel; 111, coupling groove; 1111, side groove wall; 1111a, mounting track; 112, reinforcing member; 113, caulking groove; 12, upper cover; 121, receiving groove; 13, base;

[0047] 20, battery cell module; 21, battery cell; 22, battery cell bracket; 221, receiving cavity; 222, fixing hole; 23, battery cell connecting piece; 231, welding groove; 2311, heat dissipation space; 232, detection connection part; 24, reinforcement piece; 241, avoidance area; 242, second back glue; 25, flexible circuit board; 251, solder pad; 2511, through - hole; 2512, first back glue; 252, FDC cable; 2521, thin FDC cable; 26, temperature detection device; 27, detection power line; 28, detection bracket; 29, power line; 210, power line bracket; 211, single - section detection line;

[0048] 30, terminal assembly;

[0049] 40, handle;

[0050] 51, pin shaft; 52, elastic reset member; 53, damping member;

[0051] 60, electric display assembly; 61, transparent member; 62, lamp shade assembly; 63, switch; 64, adapter; 65, spring;

[0052] 71, first seal; 72, second seal; 73, fourth seal; 74, fifth seal;

[0053] 81, first fixing member; 82, second fixing member. Detailed implementation manners

[0054] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above - mentioned drawings.

[0055] In this application, the terms "comprise", "comprising", "include", "including", or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus. Without further limitation, an element qualified by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0056] In this application, the term "and / or" describes an associative relationship between associated objects and represents three possible relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, in this application, the character " / " generally indicates an "and / or" relationship between the associated objects before and after it.

[0057] In this application, the terms "connect", "couple", "join", and "mount" can be direct connections, couplings, joins, or mounts, or they can be indirect connections, couplings, joins, or mounts. By way of example, a direct connection means that two parts or components are connected together without an intermediate member, and an indirect connection means that two parts or components are each connected to at least one intermediate member, and the two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings and can include electrical connections or couplings.

[0058] In this application, those of ordinary skill in the art will understand that relative terms used in conjunction with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacture, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. A numerical value that does not use a relative term should also be disclosed as a particular value with tolerances. In addition, when expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0059] In this application, those of ordinary skill in the art will understand that functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0060] In this application, the directional terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "to" or "under" another element, it can not only be directly connected "to" or "under" another element, but also be indirectly connected "to" or "under" another element through an intermediate element. It should also be understood that the directional terms such as the upper side, the lower side, the left side, the right side, the front side, and the rear side not only represent the positive direction, but can also be understood as the side direction. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0061] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" can be used interchangeably. When using the units "controller", "processor", "central processing unit", "CPU", or "MCU" to perform specific functions, unless otherwise specified, these functions can be performed by a single one of the above units or multiple of the above units.

[0062] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve specific functions.

[0063] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (such as a controller, a processor, etc.).

[0064] Such as Figures 1 to 16As shown, 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 devices may include large outdoor walking devices, such as ride-on lawn mowers, snow blowers, etc.; the electronic devices may also include some energy conversion devices, such as adapters or inverters, which can convert the electrical energy output by the battery pack 100 and supply power to other power tools, such as power tool drills, pruning machines, sanders, etc. Or, the power tool may also be a bench-type tool, such as a table saw, a miter saw, etc. Or, the power tool may also be a push-type power tool, such as a push-type lawn mower, a push-type snow blower. Or, the power tool may also be a ride-on power tool, such as a ride-on lawn mower, a ride-on vehicle, an all-terrain vehicle, etc. Or, the power tool may also be a robotic tool, such as a lawn mowing robot, a snow blowing robot, etc. In some embodiments, the power tool may be a drill, a light, an electric vehicle, etc. In some embodiments, the power tool may also be a gardening tool, such as a pruning machine, a blower, a lawn mower, a chain saw, etc. Or, 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 weed trimmer, a lawn mower, a pruning machine, a chain saw, etc. Or, the power tool may also be a cleaning tool, such as a blower, a snow blower, a washer, etc. Or, the power tool may also be a drilling tool, such as a drill, a screwdriver, a wrench, a jackhammer, etc. Or, the power tool may also be a sawing tool, such as a reciprocating saw, a jigsaw, a circular saw, etc. Or, the power tool may also be a bench-type tool, such as a table saw, a miter saw, a metal cutting machine, a router, etc. Or, the power tool may also be a grinding tool, such as an angle grinder, a sander, etc. Or, the power tool may also be other tools, such as a light, a fan, etc.

[0065] 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.

[0066] The battery pack 100 includes a housing assembly 10, a battery cell module 20, and a terminal assembly 30. The housing assembly 10 forms the main body part of the battery pack 100, and the housing assembly 10 is substantially in the shape of a cuboid. The housing assembly 10 forms a receiving space for receiving the battery cell module 20. In one embodiment, referring to Figures 1 to 3, the housing assembly 10 may include an upper cover 12, a barrel 11, and a base 13, and the three can form a substantially enclosed accommodation space. Of course, the housing assembly 10 may also include left and right housings, or upper and lower housings, or housings in other assembled forms. A terminal assembly 30 is installed on the housing assembly 10. The terminal assembly 30 is connected to the battery cell module 20, and the battery pack 100 is electrically connected to an electronic device through the terminal assembly 30 to supply power to the electronic device. In other embodiments, wheels may be detachably provided under the housing assembly 10 to support the housing assembly 10 so that the user can move the battery pack 100 more labor-savingly.

[0067] To facilitate the operation of the user, a handle 40 may also be provided on the housing assembly 10 to facilitate the user to lift the battery pack 100. In one embodiment, the handle 40 may be integrally formed with the housing assembly 10. In one embodiment, continue to refer to Figures 1 to 3 , the handle 40 is detachably installed on one surface of the housing assembly 10. For example, the upper surface of the housing 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 through a pin shaft 51 and can rotate about 180° on the upper surface of the housing assembly 10 around the pin shaft 51. In other words, when the handle 40 is not lifted and used, 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 the electronic device. Of course, other receiving parts formed or installed on the housing assembly 10 for receiving the handle 40 and not increasing the volume of the battery pack 100 are also within the protection scope of this embodiment. In one embodiment, refer to Figure 3 , an elastic reset member 52 may also be provided at the connection between the handle 40 and the housing assembly 10. When the handle 40 is not lifted, the elastic reset member 52 can reset the handle 40 into the receiving groove 121. In one implementation, the elastic reset member 52 may be a torsion spring. In one embodiment, a damping member 53 is also provided on the handle 40 to increase the damping feeling and make the handle 40 reset slowly. In this embodiment, the damping member 53 may be a rubber column. The damping member 53 can generate frictional damping with the upper cover 12 during the reset process of the handle 40 through an interference fit with the upper cover 12, and can prevent the handle 14 from resetting.

[0068] To improve the sealing performance of the housing assembly 10, the inside of the housing assembly 10 is completely sealed from the outside of the housing assembly 10. The so-called complete seal can be understood as 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 sealant groove 113 for pouring sealant. For example Figure 16As shown, a sealant groove 113 is provided at the upper end of the barrel 11. The sealant groove 113 is filled with a sealant, and the gap between the barrel 11 and the upper cover 12 is sealed by the sealant. When filling the sealant groove 113 with the sealant, the polyurethane foam sealant process can be adopted. Specifically, by using a two-component dispensing system, the A and B components of the polyurethane foam adhesive are mixed and then dispensed into the sealant groove 113 that needs to be sealed. After the two-component adhesive starts to react and foam, the sealant groove 113 is filled with foam. Then, the upper cover 12 and the barrel 11 are locked and assembled to achieve the sealing and waterproofing of the gap between the upper cover 12 and the barrel 11. Or the silicone foam sealant process can also be adopted. Specifically, by using a two-component dispensing system, the A and B components of the silicone foam adhesive are mixed and then dispensed into the sealant groove 113 that needs to be sealed. After the two-component adhesive starts to react and foam, the sealant groove 113 is filled with foam. Then, the upper cover 12 and the barrel 11 are locked and assembled to achieve the sealing and waterproofing of the gap between the upper cover 12 and the barrel 11. Or the one-component silicone sealing process can be adopted, such as using a one-component alcohol-free vulcanizing silicone to seal by the FIPG process. Or the hot-melt foam sealant process can also be adopted. Specifically, by using a hot-melt glue gun, the non-reactive hot-melt foam adhesive is dispensed into the sealant groove 113 that needs to be sealed. After the hot-melt adhesive cools down and starts to foam, the sealant groove 113 is filled with foam. Then, the upper cover 12 and the barrel 11 are locked and assembled to achieve the sealing and waterproofing of the gap between the upper cover 12 and the barrel 11. The above-mentioned sealing materials or sealing processes can also be used in any other places in the battery pack 100 that need to be sealed, which will not be listed one by one here.

[0069] In some embodiments, a plurality of gaps of the housing assembly 10 that can communicate with the outside are sealed by a plurality of seals, so that the sealing grade of the sealed housing assembly 10 is greater than or equal to IPX2.

[0070] As Figure 1 shown, the barrel 11 and the upper cover 12 are locked and assembled through a first fixing member 81. The first fixing member 81 is a screw. A first threaded hole is provided on the barrel 11, and a first through hole is provided on the upper cover 12. The screw passes through the first through hole and is threadedly connected to the first threaded hole. There is a gap between the screw and the upper cover 12. Therefore, to ensure the sealing performance of the housing assembly 10, a first seal 71 is used to seal the gap between the screw and the upper cover 12. Refer to Figure 1 . The first seal 71 here can be a seal plug, and the seal plug is plugged into the first through hole.

[0071] As Figure 4As shown, the barrel 11 and the base 13 are tightly assembled through a second fixing member 82. The second fixing member 82 is a screw. A second threaded hole is provided on the barrel 11, and a second through hole is provided on the base 13. 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 performance 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 gasket, and the gasket is arranged between the barrel 11 and the base 13. The second sealing member 72 can be arranged around the screw. Refer to Figure 4 . In addition, there is also a gap between the screw and the base 13. To ensure the sealing performance 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, and the sealing plug is plugged into the second through hole.

[0072] At least one side of the housing assembly 10 is provided with a coupling portion for coupling with an electronic device. The coupling portion at least includes a terminal assembly 30. In one embodiment, refer to Figure 1 and Figures 4 to 5 , there is a coupling groove 111 similar to an inverted "U" shape on the side of the housing assembly 10. The coupling groove 111 includes two opposite side groove walls 1111 and a top wall. The opening of the coupling groove 111 faces the bottom of the battery pack 100. At least one side groove wall 1111 of the coupling groove 111 is recessed inward to form a mounting track 1111a, and the mounting track 1111a can guide the battery pack 100 when the battery pack 100 is mounted on the electronic device. The terminal assembly 30 is mounted at the top of the coupling groove 111. In one embodiment, a terminal mounting hole is provided at the top of the housing assembly 10, and the terminal assembly 30 can be mounted on the housing assembly 10 through the terminal mounting hole. One end of the terminal assembly 30 can be arranged inside the housing assembly 10, and one end is exposed outside the housing assembly 10. Therefore, there is a mounting gap between the terminal assembly 30 and the housing assembly 10. Refer to Figure 7 , a fourth sealing member 73 can be used to seal the gap between the terminal assembly 30 and the housing assembly 10. The fourth sealing member 73 here can be at least one of sealant, sealing ring or sealing sponge. In one embodiment, refer to Figure 5 , reinforcing members 112 are embedded in the two side groove walls 1111 of the coupling groove 111 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 reinforcing member 112 is PP + foaming agent. PC + ABS is prone to shrinkage and deformation, which is not conducive to positioning in the mold, while PP is not prone to deformation and shrinkage, and is convenient for positioning in the mold.

[0073] Refer to Figures 1 to 3 , the battery pack 100 further includes an electricity display component 60, and the electricity display component 60 is arranged on the housing assembly 10. Refer toFigure 6 , the display component 60 includes a transparent member 61, a lamp cover component 62, a switch 63, an adapter 64, and a spring 65. The transparent member 61 is disposed at the upper end of the lamp cover component 62, and the switch 63 is disposed at the lower end of the lamp cover component 62. The transparent member 61 is made of soft rubber material, and pressing the transparent member 61 can cause deformation, thereby triggering the switch 63. Since the distance from the deformation area of the transparent member 61 to the switch 63 is too far, if the transparent member 61 is directly designed to contact the switch 63, the transparent member 61 is prone to deformation and skew. Therefore, the adapter 64 and the spring 65 are added between the transparent member 61 and the switch 63 to realize the function of pressing the switch 63 by the transparent member 61 through the adapter 64 and the spring 65. There is a gap between the housing component 10 and the display component 60. To ensure the sealing performance of the housing component 10, the gap between the housing component 10 and the display component 60 is sealed by a fifth seal 74. Here, the fifth seal 74 can be an O-ring, and the O-ring is disposed between the housing component 10 and the transparent member 61.

[0074] Refer to Figure 7 , the battery cell module 20 includes a plurality of battery cells 21, a battery cell bracket 22, and a sealing cover. The plurality of battery cells 21 are disposed in the battery cell bracket 22, and the plurality of battery cells 21 can provide a voltage greater than or equal to 36V. The sealing cover seals the opening side of the battery cell bracket 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 lithium manganese ion battery cell 21 or a sodium ion battery cell 21. In one embodiment, the battery cell bracket 22 can be composed of two substantially symmetric and detachable sub-brackets, and the two sub-brackets can be fixed by screws. To ensure the sealing performance of the battery cell module 20, a sealing sleeve is sleeved on one end of the battery cell 21 facing the opening side of the battery cell bracket 22, and the gap between the sealing cover and the battery cell bracket 22 is sealed by a sixth seal.

[0075] Refer to Figure 8 , the battery cell module 20 further includes a plurality of battery cell connection plates 23. Each battery cell connection plate 23 can electrically connect at least two battery cells 21, and the battery cell connection plate 23 is connected to the battery cell 21 by welding. In one embodiment, a group of battery cells 21 connected together by the battery cell connection plate 23 is called a battery unit. Each battery unit can have two groups of battery cell connection plates 23, namely a group of positive battery cell connection plates 23 and a group of negative battery cell connection plates 23. The positive battery cell connection plates 23 are connected to the positive electrodes of each battery cell 21 in the battery unit, and the negative battery cell connection plates 23 are connected to the negative electrodes of each battery cell 21 in the battery unit. The positive battery cell connection plates 23 form the positive end face of the battery cell module 20, and the negative battery cell connection plates 23 form the negative end face of the battery cell module 20. Refer to Figure 7 and Figure 8, flexible printed circuit boards 25 are provided on both the positive end face and the negative end face. In one embodiment, the flexible printed circuit board 25 is connected to the battery cell connecting piece 23 by welding. In one embodiment, as shown in Figure 9 , pads 251 are provided on the flexible printed circuit board 25, and the pads 251 are connected to the battery cell connecting piece 23 by welding. In one embodiment, as shown in Figure 10 , welding grooves 231 are provided on the battery cell connecting piece 23, through holes 2511 are provided on the pads 251, and welding materials can flow into the welding grooves 231 through the through holes 2511. In one embodiment, the through holes 2511 can be multiple small holes as shown in Figure 11 , or can be a larger through hole as shown in Figure 17 , which can ensure that the welding materials flow into the welding grooves 231 faster. In one embodiment, in order to prevent the flexible printed circuit board 25 from shifting during the welding process with the battery cell connecting piece 23, a first back glue 2512 is provided on the pad 251. Referring to Figure 11 , the pad 251 is first connected to the battery cell connecting piece 23 through the first back glue 2512, and then the pad 251 and the battery cell connecting piece 23 are welded.

[0076] In one embodiment, referring to Figure 10 , at least a partial area outside the welding groove 231 is provided with a heat dissipation space 2311. When the pad 251 is welded to the welding groove 231, the heat dissipation space 2311 can be used for heat dissipation, thereby preventing false soldering caused by too high welding temperature. It can be understood that the heat dissipation space 2311 can be a continuous hollow area at one end, or can be multiple discontinuous hollow areas surrounding the welding groove 231, which is not limited here.

[0077] In one embodiment, the battery cell connecting piece 23 includes a copper-aluminum composite connecting piece, and the copper-aluminum composite connecting piece and the battery cell 21 are laser welded; the copper-aluminum composite connecting pieces are laser welded to each other. The thicknesses of different welding areas of the copper-aluminum composite connecting piece are different. For example: a 0.6 mm copper-aluminum composite connecting piece is laser welded to the pole of the battery cell 21, and the thicknesses of the copper layer and the aluminum layer in the copper-aluminum composite connecting piece can be 0.1 mm and 0.5 mm respectively, and the pole of the battery cell 21 can be composed of about 2 mm of aluminum. Another example: a 0.6 mm copper-aluminum composite connecting piece composed of a 0.1 mm copper layer and a 0.5 mm aluminum layer is laser welded to a 3 mm copper-aluminum composite connecting piece, or at least the welding surface is 3 mm of aluminum. In one embodiment, the battery cell connecting piece 23 can also be a copper-steel composite connecting piece. It can be understood that the thickness of the battery cell connecting piece 23 or the thicknesses of different materials forming the battery cell connecting piece 23 can be adjusted according to actual requirements, and will not be listed one by one here.

[0078] Referring to Figure 7 and Figure 8, the battery pack 100 further includes a reinforcing member 24, and the reinforcing member 24 at least adheres to a part of 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. An avoidance area 241 for avoiding the pad 251 is provided on the reinforcing member 24. In one embodiment, refer to Figure 12 , a second adhesive 242 is provided at the edge of the reinforcing member 24, and the reinforcing member 24 is connected to the battery cell bracket 22 through the second adhesive 242. A third adhesive is also provided on the flexible circuit board 25, and the flexible circuit board 25 is connected to the reinforcing member 24 through the third adhesive. In one embodiment, the reinforcing member 24 can be a rigid plastic part or a rigid thin plate made of other materials.

[0079] Refer to Figure 9 and Figures 13 to 15 , the battery pack 100 further includes a temperature detection device 26, and the temperature detection device 26 is configured to detect the temperature of the battery cell 21. The temperature detection device 26 is coupled to the flexible circuit board 25 through a detection power line 27, and the detection power line 27 and the flexible circuit board 25 are soldered. To prevent the temperature detection device 26 from falling off, the battery pack 100 further includes a detection bracket 28, and the detection bracket 28 is configured to support the temperature detection device 26 so that the position of the temperature detection device 26 in the housing assembly 10 is fixed. In one embodiment, a fixing hole 222 is provided on the battery cell bracket 22, 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 fix the detection bracket 28 in the fixing hole 222. In one embodiment, the adhesive is a thermally conductive adhesive. Before placing the detection bracket 28 into the fixing hole 222, first apply the thermally conductive adhesive in the fixing hole 222, and then place the detection bracket 28 into the fixing hole 222. After the thermally conductive adhesive cures, the detection bracket 28 can be fixed. In one embodiment, the battery cell bracket 22 forms a receiving cavity 221 for receiving the battery cell 21, and an avoidance area is provided in the receiving cavity 221. The avoidance area communicates with the fixing hole 222 so that the temperature detection device 26 can detect the temperature of the battery cell 21 through the avoidance area. By providing the detection bracket 28 to fix the temperature detection device 26, it can be ensured that the temperature detection device 26 can detect the temperature of the battery cell 21 and the temperature detection device 26 can be prevented from falling off. In one embodiment, the temperature detection device 26 is detachably fixed to the detection bracket 28 to facilitate operations such as maintenance of the temperature detection device 26.

[0080] The battery pack 100 further includes a PCB board, and the PCB board includes a control circuit board or a battery management circuit board; refer to Figure 17, the flexible printed circuit board 25 may include an FDC cable 252 and / or an FFC cable. The FDC cable 252 may be electrically connected to the PCB. In one embodiment, the FDC cable 252 is connected to the PCB using the ACF process. Specifically, the ACF conductive adhesive is pressed using a hot pressing device to make an electrical connection between the PCB and the FDC cable 252. In one embodiment, the gold fingers on the FDC cable 252 are connected to the gold fingers on the PCB by laser welding. Specifically, the solder paste, solder wire, and solder balls between the gold fingers on the PCB and the gold fingers on the FDC cable 252 are melted using a laser welding device, so as to make an electrical connection between the PCB and the FDC cable 252.

[0081] Refer to Figure 16 , the power cord 29 is provided inside the battery pack 100. Among them, the thinner power cord 29 is fixed using a cable slot. For the thicker power cord 29, since the wire diameter is large and a cable slot cannot be made, the thicker power cord 29 can be fixed to the cell holder 22 using a power cord bracket 210 or a cable tie.

[0082] Reference Figure 17 , at least part of the FDC cable 252 has different wire diameters, that is to say, the thickness of the FDC cable 252 can be different. In this embodiment, the relatively thinner FDC cable 2521 can be used as a fuse. When the current on the cell 21 connected to the FDC cable 252 is too large, the thin FDC cable 2521 will fuse, thereby protecting the cell 21 or the electronic components inside the battery pack 100. In one embodiment, the thin FDC cable 2521 can be close to the pad 251 or can be arranged at any position of the FDC cable 252.

[0083] Reference Figure 18 , the cell module 20 may further include a plurality of single-cell detection lines 211. The single-cell detection lines 211 are arranged to detect the electrical parameters of the cell 21, such as being able to detect the voltage or current of the cell 21. The single-cell detection lines 211 are electrically coupled to the cell connection piece 23. Specifically, the detection connection part 232 of the cell connection piece 23 can be electrically coupled to the single-cell detection lines 211. In one embodiment, the single-cell detection lines 211 can be copper wires, and the single-cell copper wire detection lines can be fixedly connected to the cell connection piece 23 using laser welding with a laser beam as the heat source. In one embodiment, the single-cell detection lines 211 can be aluminum wires, and the aluminum wires can be fixed to the cell connection piece 23 using ultrasonic welding technology. In one embodiment, the single-cell detection lines 211 can also be fixed to the cell connection piece 23 using resistance welding or UV conductive adhesive.

[0084] The basic principles, main features, and advantages of the present application have been shown and described above. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A battery pack for powering an electronic device, comprising: A housing assembly (10) mounted to and supported by the electronic device; A battery cell module (20) including a plurality of battery cells (21) and a battery cell support (22) supporting the plurality of battery cells (21), the battery cell module (20) being disposed within the housing assembly (10); At least one temperature detection device (26) configured to detect the temperature of the battery cells (21); Characterized in that it further comprises: A detection support (28) configured to support the temperature detection device (26) such that the position of the temperature detection device (26) within the housing assembly (10) is fixed.

2. The battery pack for powering an electronic device according to claim 1, characterized in that, The temperature detection device (26) is removably fixed to the detection support (28).

3. The battery pack for powering an electronic device according to claim 1, characterized in that, The battery cell support (22) is provided with fixing holes (222), and the detection support (28) is fixed within the fixing holes (222).

4. The battery pack for powering an electronic device according to claim 3, characterized in that, An adhesive is provided between the fixing holes (222) and the detection support (28) to fix the detection support (28) within the fixing holes (222).

5. The battery pack for powering an electronic device according to claim 3, characterized in that, The battery cell support (22) forms a receiving cavity (221) for receiving the battery cells (21); an avoidance area is provided within the receiving cavity (221), and the avoidance area communicates with the fixing holes (222).

6. The battery pack for powering an electronic device according to claim 1, characterized in that, The battery pack further comprises a coupling portion, the coupling portion at least including a terminal assembly (30); a reinforcement member (112) is embedded within the coupling portion.

7. The battery pack for powering an electronic device according to claim 1, characterized in that, It further comprises a flexible printed circuit board (25), the flexible printed circuit board (25) being disposed on the module end face of the battery cell module (20) formed by the positive and negative end faces of the plurality of battery cells (21); the temperature detection device (26) is electrically coupled to the flexible printed circuit board (25) through a detection power line (27).

8. The battery pack for powering an electronic device according to claim 7, wherein The detection power line (27) is soldered to the flexible printed circuit board (25).

9. The battery pack for powering an electronic device according to claim 7, wherein The battery pack further comprises a PCB board, the PCB board including a control circuit board or a battery management circuit board; the flexible printed circuit board (25) 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, characterized in that, 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, characterized in that, 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 (20) further includes a plurality of battery cell connection tabs (23), each battery cell connection tab (23) connecting at least two of the battery cells (21), and the battery cell connection tabs (23) are connected to the battery cells (21) by welding.

13. The battery pack for powering an electronic device according to claim 12, characterized in that, The battery cell connection tabs (23) include copper-aluminum composite connection tabs; the copper-aluminum composite connection tabs are laser welded to the battery cells (21); the copper-aluminum composite connection tabs are laser welded to each other.

14. The battery pack for powering an electronic device according to claim 13, characterized in that, The thicknesses of different welding areas of the copper-aluminum composite connection tabs are different.

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