Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device. The battery pack comprises a box body; the beam body is arranged in the box body in the first direction, the beam body is provided with two end parts which are arranged oppositely in the first direction, and each end part is connected with the box body; the beam body fixing structure comprises two first supports and a second support which are arranged close to the ends, the two first supports are arranged on the two sides of the beam body in the second direction respectively and connected with the beam body and the box body, and the second support is located on one side of the beam body in the first direction and connected with the two first supports. The two first supports are arranged on the two sides of the beam body in the second direction (namely the transverse direction of the beam body) correspondingly, so that the stability of the beam body in the second direction is improved. Meanwhile, the two first supports are connected through the second supports in the first direction (namely the length direction of the beam body), so that the beam body fixing structure becomes a whole, and the stability of the beam body is further improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and an electrical device. Background Technology

[0002] Battery packs are indispensable components in electrical equipment. They typically power electrical devices by installing battery modules inside a housing. In common battery packs, in addition to the battery modules inside the housing, there are beams supporting the housing. The housing is usually made of sheet metal, and is typically connected using welding and screws. The beams are usually made of different materials than the housing, and are usually screwed together. After a period of use, the battery modules expand, putting pressure on the beams. Existing beams have relatively poor stability; deformation under pressure causes the battery modules to continue expanding, and the deformed beams also compress other battery modules, leading to severe deformation of the battery modules and affecting the performance of the battery pack. Utility Model Content

[0003] This application provides a battery pack and an electrical device to improve the stability of the beam, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a battery pack is provided, having a first direction, a second direction, and a third direction intersecting each other, the battery pack comprising:

[0005] Box;

[0006] A beam is disposed within a box along a first direction, and the beam has two ends disposed opposite to each other along the first direction, with each end connected to the box.

[0007] The beam fixing structure includes at least two first supports and second supports near the ends. The beam is provided with first supports on both sides in the second direction. The first supports connect the beam and the box body. The second supports are located on one side of the beam in the first direction and are connected to the first supports on both sides of the beam.

[0008] In some embodiments, the first support includes a first plate and a second plate, the first plate being connected to the second plate in a third direction and the first plate being connected to the end of the beam in a second direction, and the second plate being connected to the box.

[0009] In some embodiments, the first support further includes a reinforcing rib connected between the first plate and the second plate.

[0010] In some embodiments, the first bracket further includes a third plate, which is connected to the first plate in a second direction and located on the side close to the second bracket, and the second bracket is fixedly connected to the third plates of the two first brackets.

[0011] In some embodiments, there is a gap between the third plate and the second plate in the third direction.

[0012] In some embodiments, the second bracket includes an extension plate and a connecting plate, the extension plate being connected to the third-direction upward end of the connecting plate, and the end of the extension plate away from the connecting plate being connected to the housing.

[0013] In some embodiments, the connecting plate has a first connecting hole and the third plate has a second connecting hole; the battery pack also includes a fixing member, which passes through the first connecting hole and the second connecting hole.

[0014] In some embodiments, the first support further includes a fourth plate, one end of which is connected to the third plate and the other end of which is connected to the first plate.

[0015] In some embodiments, the battery pack further includes: a plurality of battery modules arranged along a first direction and a second direction, with the beam disposed between two adjacent battery modules in the second direction, or the beam disposed between the battery modules and the housing in the second direction.

[0016] A second aspect of this application provides an electrical device including a battery pack as described above, the battery pack being used to provide electrical power to the electrical device.

[0017] The technical advantage of this application lies in that two first supports are respectively set on both sides of the beam in the second direction (i.e., the transverse direction of the beam) to improve the stability of the beam in the second direction. At the same time, the two first supports are connected by second supports in the first direction (the length direction of the beam), making the beam fixing structure a whole, further improving the stability of the beam.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] 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 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.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a schematic diagram of the battery pack structure provided in the application embodiments;

[0022] Figure 2 This is a schematic diagram of the beam end installation structure provided in the application embodiment;

[0023] Figure 3 This is a top view of the beam end installation provided in the embodiment of the application;

[0024] Figure 4 This is an exploded view of the beam fixing structure provided in the application embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the first bracket at one angle provided in the application embodiment;

[0026] Figure 6 This is a structural schematic diagram of the first bracket provided in the application embodiment from another angle;

[0027] Figure 7 This is a schematic diagram of the structure of the second support provided in the application embodiment;

[0028] Figure 8 This is a schematic diagram of the beam fixing structure provided in the application embodiment, which is set on the base plate;

[0029] Figure 9 This is a structural schematic diagram of the beam and partition provided in the embodiment of the application;

[0030] Figure 10 This is a schematic diagram of the connection structure between the first bracket and the second bracket provided in the application embodiment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100, Box body; 110, Base plate; 120, Side beam; 130, Receiving cavity; 200, Battery module; 300, Beam body; 310, End; 320, Bayonet; 400, Beam body fixing structure; 410, First bracket; 411, First plate; 412, Second plate; 413, Third plate; 414, Fourth plate; 415, Reinforcing rib; 416, Second connecting hole; 420, Second bracket; 421, Extension plate; 422, Connecting plate; 423, First connecting hole; 500, Fixing space; 600, Partition; 700, Fixing component; Y, First direction; X, Second direction; Z, Third direction. Detailed Implementation

[0033] 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 protection scope of this application.

[0034] like Figure 1 As shown, this application provides a battery pack having a first direction Y, a second direction X, and a third direction Z that intersect each other in pairs. It can be understood that the first direction Y can be the width direction of the battery pack, the second direction X can be the length direction of the battery pack, and the third direction Z can be the height direction of the battery pack.

[0035] like Figure 1 and Figure 2 As shown, the battery pack includes a housing 100, a beam 300, a beam fixing structure 400, and multiple battery modules 200.

[0036] like Figure 1 As shown, the housing 100 includes a bottom plate 110 and four side beams 120. Specifically, the bottom plate 110 is a plate-shaped component and can be a multi-layered bottom protective plate. The bottom plate 110 is connected to two of the four side beams 120 on both sides in the second direction X, and to the other two side beams 120 on both sides in the first direction Y. The bottom plate 110 and the four side beams 120 cooperate to form a receiving cavity 130. Multiple battery modules 200 are disposed within the receiving cavity 130, and each battery module 200 includes multiple battery cells. Multiple battery modules 200 are arranged along a first direction Y and a second direction X. A beam 300 is positioned between two adjacent battery modules 200 in the second direction X, or the beam 300 is positioned between a battery module 200 and the housing 100 (i.e., between a battery module 200 and a side beam 120) in the second direction X. The beam 300 can serve as a buffer structure, absorbing the expansion force generated by the heat of the battery cells. Alternatively, during transportation, the beam 300 can absorb and disperse external impact forces, protecting the battery modules 200 from damage.

[0037] Combination Figure 2 and Figure 3 The beam fixing structure 400 includes at least two first supports 410 and a second support 420 disposed near the end 310. The beam 300 is provided with first supports 410 on both sides of the second direction X. The first supports 410 connect the beam 300 and the box 100 and are connected to the two first supports 410 on both sides of the beam (300) to improve the connection stability between the beam 300 and the box 100 and reduce the risk of loosening or falling off at the connection.

[0038] like Figure 4 As shown, the first support 410 includes a first plate 411 and a second plate 412. One end of the first plate 411 in the third direction Z is connected to the second plate 412, and the other end of the first plate 411 in the second direction X is connected to the end 310 of the beam 300. The second plate 412 is connected to the box 100. Because the first plate 411 and the second plate 412 provide support in different directions, this design can effectively improve the bending resistance of the structure and reduce bending or deformation caused by external loads.

[0039] The first plate 411 and the second plate 412 can be fixedly connected or integrally formed. Both methods can effectively disperse and transfer stress, distribute the stress from the beam 300 more evenly to the box 100, reduce local stress concentration, and reduce the risk of structural fatigue and damage.

[0040] Please refer to Figure 5 and Figure 6 The first support 410 also includes a reinforcing rib 415, which connects the first plate 411 and the second plate 412. The reinforcing rib 415 provides additional support and increases the connection strength between the first plate 411 and the second plate 412. This helps to improve the load-bearing capacity of the entire support, enabling it to better resist external loads and stresses. The thickness of the reinforcing rib 415 can be greater than the thickness of either the first plate 411 or the second plate 412 to further enhance the connection strength between the first plate 411 and the second plate 412.

[0041] like Figure 4 , Figure 5 and Figure 6 As shown, the first bracket 410 also includes a third plate 413, which is connected to the first plate 411 in the second direction X and is located on the side close to the second bracket 420. The second bracket 420 is fixedly connected to the third plates 413 of the two first brackets 410 to form a tighter connection system. This multi-point connection can significantly improve the connection strength and reduce the risk of loosening or falling off at the connection point.

[0042] like Figure 4 As shown, a gap exists between the third plate 413 and the second plate 412 in the third direction Z, which reduces stress concentration caused by direct contact between the plates, thus lowering the risk of structural fatigue and damage. During assembly, this gap facilitates maintenance and repair, allowing tools or equipment to enter between the plates for inspection or repair.

[0043] like Figure 4 and Figure 5As shown, the first support 410 also includes a fourth plate 414, one end of which is connected to the third plate 413 and the other end of which is connected to the first plate 411. The fourth plate 414 can effectively distribute and transfer loads, enhance the load-bearing capacity of the support, and adapt to greater external pressure or weight.

[0044] In one embodiment, such as Figure 4 , Figure 5 and Figure 6 As shown, the fourth plate 414 is inclined relative to the third plate 413, and its end 310 is connected to the first plate 411, for example, by welding. The fourth plate 414 increases the deformation resistance between the first plate 411 and the third plate 413, preventing the beam 300 from tilting towards the third plate 413 when subjected to the expansion force of the battery module 200, thus preventing the beam 300 from moving.

[0045] like Figure 6 , Figure 7 and Figure 8 As shown, the second support 420 includes an extension plate 421 and a connecting plate 422. The extension plate 421 is connected to one end of the connecting plate 422 in the third direction Z, and the end of the extension plate 421 away from the connecting plate 422 is connected to the bottom plate 110 of the housing 100. The extension plate 421 provides an additional support path, effectively transferring the supporting force of the connecting plate 422 to the housing 100, which can improve the load-bearing capacity and stability of the entire structure, thereby effectively improving the bending resistance of the structure and reducing bending or deformation caused by external loads.

[0046] like Figure 7 As shown, the extension plate 421 has a roughly C-shaped structure. This shape of extension plate 421 has good strength and rigidity, can effectively resist bending and torsion, and can provide higher structural strength without significantly increasing the amount of material used.

[0047] like Figure 7 As shown, the connecting plate 422 has a first connecting hole 423, and the third plate 413 has a second connecting hole 416. Figure 6 As shown, the battery pack also includes a fastener 700, which passes through the first connecting hole 423 and the second connecting hole 416. Therefore, the fastener 700 securely connects the connecting plate 422 and the third plate 413 together, ensuring the stability and integrity of the structure. The fastener 700 may include, but is not limited to, rivets, bolts, etc., as long as it can achieve the locking function.

[0048] like Figure 9As shown, the battery pack also includes a separator 600, and each beam 300 has a slot 320 in the middle. At least part of the separator 600 is located in the slot 320 and is fixed by screws, so that each beam 300 forms a whole and further improves stability.

[0049] The specific steps for installing the battery pack are as follows:

[0050] Combination Figures 1 to 10 First, beam fixing structures 400 are installed on both sides of the box body 100, with the positions of the beam fixing structures 400 corresponding to the ends 310 of the subsequently installed beams 300. The extension plate 421 of the second bracket 420 is fixedly installed on the bottom plate 110 of the box body 100 with screws, and the second plates 412 of the two first brackets 410 are also screwed onto the bottom plate 110 of the box body 100. A fixing space 500 for fixing the ends 310 of the beams 300 is formed between the two first brackets 410 and the second bracket 420 (see reference). Figure 10 For example, one beam 300 corresponds to two beam fixing structures 400. The two beam fixing structures 400 are used to fix the two ends of the beam 300 in the length direction, that is, the two end points 310.

[0051] Second, the two ends 310 of the beam 300 are respectively placed into the corresponding fixed spaces 500. The ends 310 of the beam 300 have two side walls, which correspond to the first plates 411 on both sides of the second direction X. For example, the side walls are fitted to the first plates 411. The side walls of the ends 310 are also provided with through holes for screws to pass through. The workers connect the first plates 411 and the side walls of the ends 310 with screws, so that the ends 310 of the beam 300 are connected to the two first supports 410, and the second plate 412 is connected to the box 100, so as to fix the ends 310 of the beam 300, improve the stability of the beam 300, and reduce the probability of the beam 300 bending and deforming due to the expansion of the battery cells.

[0052] Third, at one end of the beam 300 in the first direction Y, the second bracket 420 is connected to two first brackets 410. Fixing members 700 are sequentially inserted into a first connecting hole 423 and a corresponding second connecting hole 416, connecting the second bracket 420 to one first bracket 410. The above operation is repeated at the other end of the beam 300 in the first direction Y, allowing the second bracket 420 to be simultaneously connected to both first brackets 410, forming a unified structure with the first brackets 410. This enhances the strength of the beam fixing structure 400 and further improves the stability of the beam 300. Alternatively, the connection of the second bracket 420 to the two first brackets 410 can be performed before the connection of the end 310 of the beam 300 to the first brackets 410. Therefore, the beam 300 is fixed to the bottom plate 110 of the box 100 in the third direction Z by screws.

[0053] Fourth, after the installation of the three beams 300 is completed, the partition plate 600 is inserted into the slot 320 of each beam 300 and fixed with screws, so that the beams 300 form a whole and further improve stability.

[0054] Finally, when installing the battery module 200, the battery module 200 is fixedly installed in the receiving space between the beams 300, and the battery pack cover is put on to complete the installation. The overall installation process is simple and ensures the stability of the beams 300, thereby making the battery pack stable in use.

[0055] When disassembling the battery pack, firstly, the fastener 700 connecting the first bracket 410 and the second bracket 420 needs to be removed. Secondly, the screws between the first bracket 410 and the housing 100 and between the first bracket 410 and the beam 300 need to be removed. Then, the battery module 200 needs to be disassembled to complete the disassembly of the battery pack. The overall disassembly process is simple.

[0056] This application also provides an electrical device including the aforementioned battery pack, which serves as the power source for the electrical device. The electrical device can be a mobile phone, portable device, laptop computer, electric vehicle, electric car, ship, spacecraft, electric toy, or power tool, etc. For example, 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, etc.

[0057] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] 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.

[0059] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0060] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes a first direction, a second direction, and a third direction that intersect each other in pairs. Box; A beam is disposed within the box along a first direction, the beam having two ends disposed opposite to each other along the first direction, and each end being connected to the box. The beam fixing structure includes at least two first supports and second supports disposed near the end. The first supports are respectively disposed on both sides of the beam in the second direction. The first supports connect the beam and the box body. The second supports are located on one side of the beam in the first direction and are connected to the first supports on both sides of the beam.

2. The battery pack according to claim 1, characterized in that, The first support includes a first plate and a second plate. The first plate is connected to the second plate in a third direction, and the first plate is connected to the end of the beam in a second direction. The second plate is connected to the box.

3. The battery pack according to claim 2, characterized in that, The first support also includes a reinforcing rib, which is connected between the first plate and the second plate.

4. The battery pack according to claim 2, characterized in that, The first bracket further includes a third plate, which is connected to the first plate in the second direction and located on the side close to the second bracket. The second bracket is fixedly connected to the third plates of the two first brackets.

5. The battery pack according to claim 4, characterized in that, There is a gap between the third plate and the second plate in the third direction.

6. The battery pack according to claim 4, characterized in that, The second bracket includes an extension plate and a connecting plate, the extension plate being connected to the connecting plate at one end in the third direction, and the end of the extension plate away from the connecting plate being connected to the housing.

7. The battery pack according to claim 6, characterized in that, The connecting plate has a first connecting hole, and the third plate has a second connecting hole; The battery pack also includes a fixing member, which passes through the first connection hole and the second connection hole.

8. The battery pack according to claim 4, characterized in that, The first support also includes a fourth plate, one end of which is connected to the third plate and the other end of which is connected to the first plate.

9. The battery pack according to claim 1, characterized in that, The battery pack also includes: Multiple battery modules are arranged along the first direction and the second direction. The beam is disposed between two adjacent battery modules in the second direction, or the beam is disposed between the battery modules and the housing in the second direction.

10. An electrical appliance, characterized in that, Includes a battery pack as described in any one of claims 1 to 9, the battery pack being used to provide electrical power to the electrical device.

Images