Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and belongs to the technical field of batteries, the battery pack has a first direction and comprises a box body, a battery pack, a wire harness and a support, the box body is provided with a containing cavity, the battery pack, the wire harness and the support are all arranged in the containing cavity, and the battery pack comprises a plurality of battery monomers arranged in the first direction; the wire harness is conductively connected with the battery pack and partially surrounds the battery pack; the wire harness comprises a first bending part; the support is connected with the box body and comprises a second bent part, the second bent part is arranged on the peripheral side of the battery pack and provided with a containing groove with the same extending direction as the second bent part, and the first bent part is arranged in the containing groove. The first bending part is accommodated in the accommodating groove of the second bending part, so that the wire harness is limited and fixed, the bending radius of the first bending part can be limited, the space occupied by the wire harness when the wire harness is arranged in the accommodating cavity is reduced, and the volume energy density of the battery pack is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] After multiple battery cells are connected in series and parallel within a battery pack, sampling and communication are required via a multi-strand wire harness. This multi-strand wire harness typically wraps around the battery pack, which consists of multiple battery cells. It needs to be secured to ensure the safety of the wiring within the battery pack. However, currently, the wire harness is not effectively secured at the edge of the battery pack, resulting in a large space occupation and hindering the improvement of the battery pack's volumetric energy density. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack that solves the problem that existing wiring harnesses occupy a large space and are not conducive to improving the volumetric energy density of the battery pack because they are not effectively fixed at the edge of the battery pack. Another purpose of this application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of this application has a first orientation, including:

[0005] The box-shaped enclosure has a receiving cavity;

[0006] A battery pack is disposed within the receiving cavity, and the battery pack includes a plurality of battery cells arranged along the first direction;

[0007] A wire harness is disposed within the receiving cavity and is electrically connected to the battery pack, with a portion of the wire harness surrounding the battery pack; the wire harness includes a first bend to change the routing direction of the wire harness.

[0008] A bracket is disposed in the receiving cavity and connected to the housing. The bracket includes a second bent portion disposed on the periphery of the battery pack. The second bent portion has a receiving groove in the same direction of extension as the second bent portion. The first bent portion is disposed in the receiving groove.

[0009] In some embodiments, the housing includes a bottom plate, and the second bending portion includes:

[0010] A support plate is connected to the base plate;

[0011] The first side plate is connected to the side of the support plate away from the bottom plate;

[0012] The second side plate is disposed on the side of the first side plate away from the battery pack and is spaced apart from the first side plate. The second side plate is connected to the support plate.

[0013] The support plate, the first side plate, and the second side plate form the receiving groove.

[0014] In some embodiments, the battery pack has a second direction perpendicular to the first direction;

[0015] The first side plate includes:

[0016] The first segment is connected to the support plate and is disposed on one side of the battery pack along the first direction;

[0017] The first transition section is connected to both the first section and the support plate.

[0018] The second segment is connected to the side of the first transition segment away from the first segment and is disposed on one side of the battery pack along the second direction. The second segment is connected to the support plate.

[0019] In some embodiments, the second side plate includes:

[0020] The third segment is connected to the support plate; the third segment is disposed along the first direction on the side of the first segment away from the battery pack, and is spaced apart from the first segment.

[0021] The second transition section is connected to the third section and the support plate respectively; the second transition section is located on the side of the first transition section away from the battery pack and is spaced apart from the first transition section.

[0022] The fourth segment is connected to the side of the second transition segment away from the third segment and is connected to the support plate; the fourth segment is disposed along the second direction on the side of the second segment away from the battery pack and is spaced apart from the second segment.

[0023] In some embodiments, both the first transition section and the second transition section are curved, and the concave surfaces of the first transition section and the second transition section face the battery pack.

[0024] In some embodiments,

[0025] The first segment has a first through hole, and the third segment has a third through hole, with the first through hole and the third through hole being disposed opposite to each other;

[0026] The second segment has a second through hole, and the fourth segment has a fourth through hole, with the second through hole and the fourth through hole being disposed opposite to each other;

[0027] The battery pack further includes a first flexible fastener and a second flexible fastener. The first flexible fastener passes through the first through hole and the third through hole and is arranged around the second bent portion. The second flexible fastener passes through the second through hole and the fourth through hole and is arranged around the second bent portion.

[0028] In some embodiments, the battery pack has a third direction perpendicular to the first direction, and the bracket further includes a fixing part connected to the support plate and located on the side of the second side plate away from the first side plate. The fixing part has a fixing hole that penetrates the fixing part along the third direction.

[0029] In some embodiments, the bracket further includes a plurality of fixing parts, which are spaced apart and all connected to the support plate.

[0030] In some embodiments,

[0031] The bracket also includes a third side plate, which is connected to the side of the first side plate away from the support plate, and the third side plate has a limiting groove;

[0032] The wiring harness includes a branch line, which is connected to the first bend and extends to the outside of the receiving groove. The branch line is electrically connected to the battery pack and to the third side plate.

[0033] The battery pack also includes a third flexible fastener, which is arranged around the outside of the branch line and the third side plate to connect the branch line to the third side plate; a portion of the third flexible fastener is disposed within the limiting groove.

[0034] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0035] Beneficial effects: Compared with the prior art, a battery pack according to an embodiment of this application has a first direction and includes a housing, a battery pack, a wiring harness, and a bracket. The housing has a receiving cavity, and the battery pack is disposed in the receiving cavity. The battery pack includes a plurality of battery cells arranged along the first direction. The wiring harness is disposed in the receiving cavity and is electrically connected to the battery pack. A portion of the wiring harness is disposed around the battery pack. The wiring harness includes a first bend to change the wiring harness's direction of arrangement. The bracket is disposed in the receiving cavity and connected to the housing. The bracket includes a second bend, which is disposed on the periphery of the battery pack. The second bend has a receiving groove, and the extension direction of the second bend is the same as the extension direction of the receiving groove. The first bend is disposed in the receiving groove. This application uses a bracket to fix the wire harness, wherein the second bending part is disposed on the periphery of the battery pack and the first bending part is accommodated by a receiving groove, thereby realizing the limiting and fixing of the wire harness and limiting the bending radius of the first bending part, reducing the problem of excessive space occupation caused by excessive bending radius of the wire harness, reducing the space occupied by the wire harness when arranged in the receiving cavity, and thus helping to improve the volumetric energy density of the battery pack.

[0036] Compared with the prior art, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments. It is understood that the electrical device of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of this application;

[0039] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the structure connecting the housing, wiring harness and bracket according to an embodiment of this application;

[0041] Figure 4 yes Figure 3 Enlarged view of section B;

[0042] Figure 5 This is a schematic diagram of a wire harness and bracket connection according to an embodiment of this application;

[0043] Figure 6 yes Figure 5 Enlarged view of section A;

[0044] Figure 7 This is a schematic diagram of the overall structure of a bracket according to an embodiment of this application.

[0045] Explanation of reference numerals in the attached drawings: 100, housing; 110, receiving cavity; 120, bottom plate; 200, battery pack; 210, individual battery cell; 300, wiring harness; 310, first bend; 320, branch line; 400, bracket; 410, receiving groove; 420, support plate; 430, first side plate; 431, first section; 432, first transition section; 433, second section; 434, first through hole; 435, second through hole; 440 441. Second side plate; 442. Third section; 443. Second transition section; 444. Fourth section; 445. Third through hole; 446. Fourth through hole; 450. Fixing part; 451. Fixing hole; 460. Third side plate; 461. Limiting groove; 470. Second bending part; 500. First flexible fastener; 600. Second flexible fastener; 700. Third flexible fastener; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of 85° to 95° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of 5° is considered parallel.

[0048] It should also be noted that in the accompanying drawings of this application, arrows labeled X indicate the first direction X, arrows labeled Y indicate the second direction Y, and arrows labeled Z indicate the third direction Z. In the embodiments of this application, the first direction X is the length direction of the battery pack, which is also the arrangement direction of the multiple battery cells; the second direction Y is the width direction of the battery pack; and the third direction Z is the height direction of the battery pack. The introduction of the first direction X, the second direction Y, and the third direction Z is to facilitate the description of the structural positional relationship of the components of the battery pack, thereby facilitating the understanding of its structure.

[0049] In related technologies, wiring harnesses need to be arranged in the battery pack to meet the circuit layout requirements of the battery pack. The wiring harnesses generally have requirements for the structural layout space. The wiring harnesses need to be bent at the corners and edges of the battery pack. Since the wiring harnesses are not effectively fixed, the wiring harnesses have too much freedom, resulting in them occupying a large space in the battery pack.

[0050] In view of this, embodiments of this application provide a battery pack designed to solve the aforementioned problems.

[0051] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This application provides a battery pack with a first direction X, including a housing 100, a battery pack 200, a wiring harness 300, and a bracket 400. The housing 100 has a receiving cavity 110, and the battery pack 200 is disposed within the receiving cavity 110. The battery pack 200 includes a plurality of battery cells 210 arranged along the first direction X. The wiring harness 300 is disposed within the receiving cavity 110 and is electrically connected to the battery pack 200. A portion of the wiring harness 300 surrounds the battery pack 200. The battery pack 200 includes a first bending portion 310 for changing the routing direction of the wiring harness 300; a bracket 400 is disposed in the receiving cavity 110 and connected to the housing 100. The bracket 400 includes a second bending portion 470, which is disposed on the periphery of the battery pack 200. The second bending portion 470 has a receiving groove 410 with the same extension direction as it (i.e., the extension direction of the second bending portion 470 is the same as the extension direction of the receiving groove 410). The first bending portion 310 is disposed in the receiving groove 410.

[0052] In this embodiment, a bracket 400 is used to fix the wire harness 300. The second bending portion 470 is disposed on the periphery of the battery pack 200, and the first bending portion 310 is accommodated by the receiving groove 410, thereby limiting and fixing the wire harness 300. The extension direction of the second bending portion 470 is the same as the extension direction of the receiving groove 410. That is, through the conformal design of the receiving groove 410 and the second bending portion 470, the bending radius of the first bending portion 310 can be limited, reducing the problem of excessive space occupation caused by the excessive bending radius of the wire harness 300, reducing the space occupied by the wire harness 300 when arranged in the receiving cavity 110, and thus helping to improve the volumetric energy density of the battery pack.

[0053] Specifically, in this embodiment, there can be multiple battery packs 200, which are arranged along the second direction Y. The wiring harness 300 can be arranged along the gap between the battery pack 200 and the housing 100, preferably around the battery pack 200, or around a module composed of multiple battery packs 200 when there are multiple battery packs 200. In this case, the wiring harness 300 needs to be bent at the end of the battery pack 200 to form a first bent portion 310. Since the wiring harness 300 is a flexible structure with a high degree of freedom, its bending radius will be relatively large if it is not constrained. At this time, the bracket 400 of this application is used to fix it at the corner of the end of the battery pack 200, and the receiving groove 410 of the second bent portion 470 is used to receive the first bent portion 310, which can maintain the bending angle of the first bent portion 310. This can effectively reduce the bending radius of the first bent portion 310, thereby reducing the space occupied by the wiring harness 300 in the receiving cavity 110, which is beneficial to improving the volumetric energy density of the battery pack.

[0054] It should be noted that the extending direction of the receiving groove 410 in this embodiment is the same as the extending direction of the second bent portion 470. Therefore, it can be understood that the receiving groove 410 as a whole also extends in a bent manner. At this time, the first bent portion 310 is accommodated in the receiving groove 410 and its deformation is restricted by the groove wall of the receiving groove 410, so that the first bent portion 310 can maintain approximately the same bending angle as the second bent portion 470.

[0055] It should also be noted that the bracket 400 is fixed on the housing 100, and the first bending part is set in the receiving groove 410. At this time, the position of the first bending part 310 in the housing 100 can be fixed, effectively restricting the degree of freedom of the wire harness 300, which is conducive to keeping the wiring in the housing 100 of the battery pack neat.

[0056] Please refer to the following: Figure 3 , Figure 4 , Figure 6 and Figure 7In some embodiments, the housing 100 includes a bottom plate 120, and the second bending portion 470 includes a support plate 420, a first side plate 430, and a second side plate 440. The support plate 420 is connected to the bottom plate 120, the first side plate 430 is connected to the side of the support plate 420 away from the bottom plate 120, and the second side plate 440 is disposed on the side of the first side plate 430 away from the battery pack 200 and spaced apart from the first side plate 430. The second side plate 440 is connected to the support plate 420. The support plate 420, the first side plate 430, and the second side plate 440 form an accommodating groove 410.

[0057] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the battery pack has a second direction Y perpendicular to the first direction X; the first side plate 430 includes a first segment 431, a first transition segment 432 and a second segment 433, the first segment 431 is connected to the support plate 420 and is disposed on one side of the battery pack 200 along the first direction X; the first transition segment 432 is connected to the first segment 431 and the support plate 420 respectively; the second segment 433 is connected to the side of the first transition segment 432 away from the first segment 431 and is disposed on one side of the battery pack 200 along the second direction Y, and the second segment 433 is connected to the support plate 420.

[0058] In this embodiment, the first segment 431 is disposed on one side of the battery pack 200 along the first direction X, and the second segment 433 is disposed on one side of the battery pack 200 along the second direction Y. An angle exists between the first segment 431 and the second segment 433, which is greater than zero degrees and less than 180 degrees. This allows the first side plate 430 to fit closer to the battery pack 200, minimizing the space occupied between the battery pack 200 and the side wall of the housing 100, and also restricting the wiring position of the first bend 310. In this embodiment, by providing a first transition segment 432 to connect the first segment 431 and the second segment 433, a sharp corner is avoided from being formed by a direct connection between the first segment 431 and the second segment 433. This effectively protects the first bend 310, reduces wear on the first bend 310 under vibration conditions, and effectively ensures the service life of the wiring harness 300.

[0059] Please continue to refer to the following: Figure 6 and Figure 7In some embodiments, the second side plate 440 includes a third segment 441, a second transition segment 442, and a fourth segment 443. The third segment 441 is connected to the support plate 420. The third segment 441 is disposed along the first direction X on the side of the first segment 431 away from the battery pack 200 and is spaced apart from the first segment 431. The second transition segment 442 is connected to both the third segment 441 and the support plate 420. The second transition segment 442 is disposed along the side of the first transition segment 432 away from the battery pack 200 and is spaced apart from the first transition segment 432. The fourth segment 443 is connected to the side of the second transition segment 442 away from the third segment 441 and is connected to the support plate 420. The fourth segment 443 is disposed along the second direction Y on the side of the second segment 433 away from the battery pack 200 and is spaced apart from the second segment 433.

[0060] In this embodiment, the third segment 441 is disposed opposite to the first segment 431 and forms a straight groove segment with the support plate 420; the fourth segment 443 is disposed opposite to the second segment 433 and forms another straight groove segment with the support plate 420; the first transition segment 432 is disposed opposite to the second transition segment 442 and forms a bent groove segment with the support plate 420. The two straight groove segments and the one bent groove segment form the receiving groove 410 of this application. By setting this structure of the second side plate 440, the bent shape of the receiving groove 410 is further defined, and the overall external dimensions of the second bent portion 470 can be further reduced, further reducing the space occupied.

[0061] This application utilizes the third segment 441, the first segment 431, and the support plate 420 to limit one end of the first bent portion 310, utilizes the fourth segment 443, the second segment 433, and the support plate 420 to limit the other end of the first bent portion 310, and utilizes the first transition segment 432, the second transition segment 442, and the support plate 420 to limit the middle bent portion of the first bent portion 310, thereby achieving effective limiting of the first bent portion 310, effectively reducing the bending radius of the first bent portion 310, and thus reducing the space occupied by the wiring harness 300 in the battery pack.

[0062] Please continue to refer to the following: Figure 4 and Figure 7 In some embodiments, both the first transition section 432 and the second transition section 442 are curved, and the concave surfaces of the first transition section 432 and the second transition section 442 face the battery pack 200.

[0063] In this embodiment, both the first transition section 432 and the second transition section 442 are curved, and the direction of the curved concavity is the same. This enables a smooth transition from the first section 431 to the second section 433, as well as a smooth transition from the third section 441 to the fourth section 443. This reduces the mutual wear between the first bending section 310 and the second bending section 470 after the first bending section 310 is placed inside the second bending section 470.

[0064] Please continue to refer to the following: Figure 6 and Figure 7 In some embodiments, the first segment 431 has a first through hole 434, the third segment 441 has a third through hole 444, and the first through hole 434 and the third through hole 444 are disposed opposite to each other; the second segment 433 has a second through hole 435, the fourth segment 443 has a fourth through hole 445, and the second through hole 435 and the fourth through hole 445 are disposed opposite to each other; the battery pack also includes a first flexible fastener 500 and a second flexible fastener 600, the first flexible fastener 500 passes through the first through hole 434 and the third through hole 444 and is disposed around the second bent portion 470, and the second flexible fastener 600 passes through the second through hole 435 and the fourth through hole 445 and is disposed around the second bent portion 470.

[0065] In this embodiment, by providing a first flexible fastener 500 that passes through the first through hole 434 and the third through hole 444 and surrounds the second bent portion 470, and by providing a second flexible fastener 600 that passes through the second through hole 435 and the fourth through hole 445 and surrounds the second bent portion 470, a fixed connection between the first bent portion 310 and the second bent portion 470 can be achieved after the first bent portion 310 is placed in the receiving groove 410, effectively preventing the first bent portion 310 from coming out of the receiving groove 410 and improving the stability of the wire harness 300.

[0066] Please continue to refer to the following: Figure 6 and Figure 7 In some embodiments, the battery pack has a third direction Z perpendicular to the first direction X. The bracket 400 also includes a fixing part 450, which is connected to the support plate 420 and is located on the side of the second side plate 440 away from the first side plate 430. The fixing part 450 has a fixing hole 451 that penetrates the fixing part 450 along the third direction Z.

[0067] In this embodiment, the fixing part 450 provides a fixing fulcrum for the bracket 400, facilitating the connection and fixation between the bracket 400 and the housing 100. Simultaneously, the fixing part 450 is located on the side of the second side plate 440 away from the first side plate 430. This avoids the fixing part 450 being positioned between the second bending part 470 and the battery pack 200, allowing the second bending part 470 to move closer to the battery pack 200, facilitating a compact layout of the wiring harness 300 and reducing unnecessary length of the wiring harness 300. The fixing part 450 has a fixing hole 451, through which fasteners such as bolts or screws can be directly connected to the bottom plate 120 of the housing 100, effectively fixing the bracket 400.

[0068] Please continue to refer to the following: Figure 6 and Figure 7 In some embodiments, the bracket 400 further includes a plurality of fixing parts 450, which are spaced apart and all connected to the support plate 420.

[0069] In this embodiment of the application, multiple fixing parts 450 arranged at intervals can realize multi-point fixed connection between the bracket 400 and the box 100, thereby further improving the stability of the bracket 400.

[0070] Please continue to refer to the following: Figure 6 and Figure 7 In some embodiments, the bracket 400 further includes a third side plate 460, which is connected to the side of the first side plate 430 away from the support plate 420, and the third side plate 460 has a limiting groove 461; the wiring harness 300 includes a branch line 320, which is connected to the first bend 310 and extends to the outside of the receiving groove 410, the branch line 320 is electrically connected to the battery pack 200, and the branch line 320 is connected to the third side plate 460; the battery pack further includes a third flexible fastener 700, which is disposed around the branch line 320 and the outside of the third side plate 460 so that the branch line 320 is connected to the third side plate 460; a portion of the third flexible fastener 700 is disposed within the limiting groove 461.

[0071] In this embodiment, the third side plate 460 extends to the side of the first side plate 430 away from the support plate 420. This is equivalent to the third side plate 460 being located outside the opening of the receiving groove 410. The third side plate 460 is used to support and fix the straight line. Simultaneously, a third flexible fastener 700 is arranged around the third side plate 460 and the branch line 320, which can fix the branch line 320 to the third side plate 460, effectively reducing the degree of freedom of the branch line 320. Furthermore, this application provides a limiting groove 461 on the third side plate 460 to accommodate the third flexible fastener 700, thereby limiting the position of the third flexible fastener and effectively reducing the risk of the third flexible fastener 700 detaching from the third side plate 460 under vibration or other operating conditions, ensuring the stability of the third flexible fastener's fixation.

[0072] In the embodiments of this application, the first flexible fastener 500, the second flexible fastener 600 and the third flexible fastener 700 can all be cable ties or similar fixing ropes.

[0073] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0074] It is understood that the electrical device includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here.

[0075] Of course, the electrical devices referred to in this application can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, Having a first direction, including: The box-shaped enclosure has a receiving cavity; A battery pack is disposed within the receiving cavity, and the battery pack includes a plurality of battery cells arranged along the first direction; A wire harness is disposed within the receiving cavity and is electrically connected to the battery pack, with a portion of the wire harness surrounding the battery pack; the wire harness includes a first bend to change the routing direction of the wire harness. A bracket is disposed in the receiving cavity and connected to the housing. The bracket includes a second bent portion disposed on the periphery of the battery pack. The second bent portion has a receiving groove, and the extending direction of the second bent portion is the same as the extending direction of the receiving groove. The first bent portion is disposed in the receiving groove.

2. The battery pack according to claim 1, characterized in that, The housing includes a bottom plate, and the second bending portion includes: A support plate is connected to the base plate; The first side plate is connected to the side of the support plate away from the bottom plate; The second side plate is disposed on the side of the first side plate away from the battery pack and is spaced apart from the first side plate. The second side plate is connected to the support plate. The support plate, the first side plate, and the second side plate form the receiving groove.

3. The battery pack according to claim 2, characterized in that, The battery pack has a second direction perpendicular to the first direction; The first side plate includes: The first segment is connected to the support plate and is disposed on one side of the battery pack along the first direction; The first transition section is connected to both the first section and the support plate. The second segment is connected to the side of the first transition segment away from the first segment and is disposed on one side of the battery pack along the second direction. The second segment is connected to the support plate.

4. The battery pack according to claim 3, characterized in that, The second side plate includes: The third segment is connected to the support plate; the third segment is disposed along the first direction on the side of the first segment away from the battery pack, and is spaced apart from the first segment. The second transition section is connected to the third section and the support plate respectively; the second transition section is located on the side of the first transition section away from the battery pack and is spaced apart from the first transition section. The fourth segment is connected to the side of the second transition segment away from the third segment and is connected to the support plate; the fourth segment is disposed along the second direction on the side of the second segment away from the battery pack and is spaced apart from the second segment.

5. The battery pack according to claim 4, characterized in that, Both the first transition section and the second transition section are curved, and the concave surfaces of the first transition section and the second transition section face the battery pack.

6. The battery pack according to claim 4, characterized in that, The first segment has a first through hole, and the third segment has a third through hole, with the first through hole and the third through hole being disposed opposite to each other; The second segment has a second through hole, and the fourth segment has a fourth through hole, with the second through hole and the fourth through hole being disposed opposite to each other; The battery pack further includes a first flexible fastener and a second flexible fastener. The first flexible fastener passes through the first through hole and the third through hole and is arranged around the second bent portion. The second flexible fastener passes through the second through hole and the fourth through hole and is arranged around the second bent portion.

7. The battery pack according to claim 2, characterized in that, The battery pack has a third direction perpendicular to the first direction. The bracket also includes a fixing part, which is connected to the support plate and located on the side of the second side plate away from the first side plate. The fixing part has a fixing hole that penetrates the fixing part along the third direction.

8. The battery pack according to claim 7, characterized in that, The bracket also includes a plurality of fixing parts, which are spaced apart and all connected to the support plate.

9. The battery pack according to claim 2, characterized in that, The bracket also includes a third side plate, which is connected to the side of the first side plate away from the support plate, and the third side plate has a limiting groove; The wiring harness includes a branch line, which is connected to the first bend and extends to the outside of the receiving groove. The branch line is electrically connected to the battery pack and to the third side plate. The battery pack also includes a third flexible fastener, which is arranged around the outside of the branch line and the third side plate to connect the branch line to the third side plate; a portion of the third flexible fastener is disposed within the limiting groove.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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