A fixing structure and a battery box

Abstract

A fixing structure and a battery box belong to the field of power batteries. The fixing structure includes a first connector, a transition body, and a second connector connected in sequence. The fixing structure is an integrated structure with relatively large structural strength and can withstand moderate external forces. At the same time, it has two connection holes with different application modes, which is helpful for connecting with other components. Therefore, the fixing structure has the advantages of convenient connection and use and longer service life.

Description

Technical Field

[0001] The present application relates to the field of power batteries, and more specifically, to a fixing structure and a battery box. Background Art

[0002] Power batteries are the power source for various tools and equipment. Generally speaking, power batteries refer to secondary batteries that provide power for electric vehicles, etc., to distinguish them from the starting batteries of car engines.

[0003] Considering the usage scenarios of power batteries and the energy density of batteries, power batteries are usually provided in the form of battery packs and are contained in boxes for easy transportation and installation. Battery packs are usually composed of multiple battery packs and are also equipped with battery management systems. The battery pack is composed of multiple battery cells, which can provide relatively higher voltage and battery capacity. Among them, the battery cell is the basic unit that constitutes the battery pack and battery pack, and its voltage is generally 3 to 4V.

[0004] Since the battery pack contains multiple battery cells connected in series and parallel, it is necessary to consider the stability of the installation and transportation of the power battery in tools and equipment to avoid the battery from shaking and causing bumps or even damage. Summary of the invention

[0005] In order to improve or even solve the stability problems of installation and transportation of power batteries, the present application proposes a fixing structure and a battery box.

[0006] This application is implemented as follows:

[0007] In a first aspect, an example of the present application provides a fixing structure for being arranged in a box so as to carry or install a battery through the box.

[0008] The fixing structure includes a first connecting body, a transition body and a second connecting body.

[0009] The first connector and the second connector are opposite to each other, and the first connector is configured to be coupled to a first position of the box, and the second connector is configured to be coupled to a second position of the box adjacent to the first position. At the same time, the second connector has at least two connection holes, and at least one of the at least two connection holes is provided with a thread. The two ends of the transition body are respectively connected to the first connector and the second connector. The transition body has an inner surface and an outer surface opposite to the inner surface, and the transition body is configured to face the box with the inner surface.

[0010] The first connector, the transition body and the second connector are connected in sequence to form an integral fixed structure, so the overall structure is highly stable and resistant to pulling and dragging. In other words, the above-mentioned fixed structure has a relatively high strength. Therefore, after the box for storing the battery is provided with the fixed structure, it can be moved or fixed to the electrical equipment (such as an electric car) through the fixed structure, so that the box can withstand relatively frequent and high-intensity movement operations, and it is also conducive to the battery being stably fixed and relatively still with the electrical equipment to reduce the shaking of the battery. In addition, since the fixed structure has at least two connecting holes, and at least one of the connecting holes is provided with threads, the fixed structure can be limited from both the positive and negative directions, making the installation operation convenient and more flexible.

[0011] In combination with the first aspect, in a first possible implementation manner of the first aspect of the present application, the transition body is in a bent shape.

[0012] Compared with a straight shape, the transition body in a bent shape can give the fixed structure improved structural strength and enhance its impact resistance.

[0013] In combination with the first implementation of the first aspect, in a second possible implementation of the first aspect of the present application, the transition body is bent in an arc shape.

[0014] The transition body is bent in an arc shape, which can improve the transition smoothness of the surface and also avoid the problem of local stress to a certain extent.

[0015] In combination with the second embodiment of the first aspect, in a third possible implementation of the first aspect of the present application, the transition body includes a first end, a bending portion and a second end connected in sequence, wherein the first end is connected to the first connecting body, the second end is connected to the second connecting body, and the arc area of ​​the transition body is located at the bending portion.

[0016] The arc structure is located at the bending portion, which can increase the life of the bending portion and improve the transition smoothness between the first end and the second end.

[0017] In combination with the third implementation of the first aspect, in a fourth possible implementation of the first aspect of the present application, the second connectors and the second ends are arranged in a criss-cross pattern, which can provide installation convenience for the fixed structure.

[0018] In combination with the fourth implementation of the first aspect, in a fifth possible implementation of the first aspect of the present application, an angle formed by the first end and the second end on the inner surface is an obtuse angle.

[0019] The inner surface of the transition body forms an obtuse angle, which, combined with the arc-shaped bending portion, can further improve the smoothness of its surface.

[0020] In combination with the first aspect or the first to fifth embodiments of the first aspect, in a sixth possible implementation of the first aspect of the present application, the transition body is penetrated by a through hole extending from the inner surface to the outer surface.

[0021] The fixing structure is provided with a through hole to facilitate the cooperation with the fixing structure through other structural members, so that the battery box equipped with the fixing structure can be more firmly positioned.

[0022] In combination with the third to fifth embodiments of the first aspect, in a third possible implementation of the first aspect of the present application, the transition body is penetrated by a through hole extending from the inner surface to the outer surface, and the through hole extends from the first end through the bending portion to the second end.

[0023] The through holes are arranged in most areas of the entire transition body, thus providing a larger activity space, thereby facilitating the cooperation of other structural members as mentioned above.

[0024] In combination with the seventh implementation of the first aspect, in an eighth possible implementation of the first aspect of the present application, the through hole has a narrow hole located at the first end and a wide hole located at the second end, and the width of the narrow hole is smaller than the width of the wide hole.

[0025] The width of the through hole varies, and it is a narrow hole at the first end and a wide hole at the second end. Therefore, it can form a snap-on structure with other structural parts to improve the convenience of use.

[0026] In a second aspect, an example of the present application provides a battery box, which includes a box body and the above-mentioned fixing structure. The box body has an internal cavity, and the fixing structure is fixed to the outer wall of the box body.

[0027] In the above implementation process, the fixed structure provided in the embodiment of the present application has appropriate structural strength. Therefore, the battery box provided with the fixed structure is easier to be firmly limited, which is beneficial to ensure the stability of the batteries stored in the battery box, avoid the slow movement of the batteries during the transportation of the battery box, and is also beneficial to firmly combine it with the electrical equipment / power supply equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the box in the example of this application;

[0030] Figure 2 The fixed structure and Figure 1 Schematic diagram of the structure of the box body;

[0031] Figure 3 Shows Figure 2 A schematic diagram of the structure of a partial enlargement of the E portion;

[0032] Figure 4 A schematic structural diagram of the fixing structure in the embodiment of the present application at a first viewing angle is shown;

[0033] Figure 5 A schematic diagram of the structure of the fixing structure in the embodiment of the present application at a second viewing angle is shown;

[0034] Figure 6 A schematic diagram of the structure of the fixing structure in the embodiment of the present application at a third viewing angle is shown;

[0035] Figure 7 A schematic diagram of the structure of the cooperation between a fixer and a box body is shown.

[0036] Icon: 100-box; 101-internal cavity; 102-outer wall; 200-battery box; 201-suspension member; 202-bolt connector; 300-fixing structure; 301-first connecting body; 302-second connecting body; 303-transition body; 3031-connecting hole; 3032-thread; 3033-through hole; 401-first end; 402-bending portion; 403-second end; 501-narrow hole; 502-wide hole; 601-first part; 602-second part. DETAILED DESCRIPTION

[0037] Electric vehicles usually use power batteries as their power source, and they usually use a battery pack formed by combining multiple single cells. In order to fix the battery pack, it is placed in a battery box, and then the battery box is installed in the vehicle body.

[0038] Since cars are often in high-speed motion and start and stop quickly, the battery box will be subjected to great instantaneous forces. Therefore, it is necessary to stabilize the battery box relative to the car to ensure the stability of the battery. In addition, during the installation of the battery pack, it may be necessary to frequently move (such as lifting, etc.) the battery box, so it is also necessary to keep it moving smoothly during the movement.

[0039] Generally, the box is a roughly flat rectangular structure with a space / cavity inside for storing the battery pack. In order to hoist and fix it, various appropriate structural parts are welded on its outer wall, and then the box is operated through the structural parts. However, these structural parts have low structural strength and are easily damaged, especially after multiple handling.

[0040] In view of this, a fixing structure 300 is provided in the present application example. Figures 4 to 6 Compared with the existing fixedly arranged structural parts, it is an integral structure, which can form multiple bonding points with the box body 100 and has higher strength.

[0041] In addition, due to the aforementioned welding operation, the box body 100 is at risk of being burned through by the high temperature of the welding operation, and the heat generated by the welding will affect the size and shape of the box body 100. At the same time, the welding operation is difficult, and the unchanged operation leads to a low yield rate and a long production cycle. In view of this, in combination with the fixing structure 300 proposed in the example of the present application, it is integrally formed with the box body 100 (such as extrusion molding). Therefore, the box body 100 can be exempted from welding, thereby overcoming the impact and damage to the box body 100.

[0042] It should be noted that although the welding operation may cause damage to the box body 100, the example chooses to form the fixing structure 300 and the box body 100 in one piece. However, this does not mean that the fixing structure 300 in the example of the present application can only be formed in one piece with the box body 100. In the case where the adverse effects of the welding operation are not considered or the welding operation does not have any adverse effects or the effects are negligible compared to the advantages of the welding operation due to the selection of materials and the adjustment of processes, the fixing structure 300 can also be selected to be connected to the box body 100 by welding.

[0043] In order to facilitate the understanding of the fixing structure 300 in the example solution of the present application, the structure of the box body 100 cooperating therewith in the example is briefly described below.

[0044] Figure 1 A schematic diagram of the structure of a box 100 is given. Figure 1 As shown, the box body 100 is generally a flat rectangular parallelepiped structure. It has a bottom wall, a surrounding wall (including a front wall plate, a rear wall plate, a left wall plate and a right wall plate) and a top wall (not shown in the figure), and is enclosed by the aforementioned partition walls to form an internal cavity 101 for accommodating batteries. Based on the need to fix the battery, the inner wall of the box body 100 can be provided with various appropriate fixing structures 300 such as grooves, holes, protrusions, etc. In addition, in order to facilitate the routing and cable arrangement, it can also examine structures such as holes according to design requirements.

[0045] Corresponding to the box 100, the fixed structure 300 in the present application is arranged on the outer wall 102 of the box 100, which can be a bottom wall, or it can also be a surrounding wall and a top wall. The fixed structure 300 in the embodiment of the present application is arranged on the outer surface of the surrounding wall in the box 100, that is, the outer wall 102. It should be pointed out that although the fixed structure 300 in the present application is described and displayed based on the box 100 of the power battery, this is not intended to limit the fixed structure 300 to only apply the box 100 of the power battery. Based on the fixed structure 300 and its application method illustrated in the example of the present application, it should be understood that it can also be applied to other fields, rather than being limited to the battery field. In other fields with fixed, transported, and moved requirements, the fixed structure 300 can still have corresponding applications. And for different application scenarios, it can be appropriately modified, for example, size specifications, manufacturing materials, manufacturing methods, etc. For example, the fixed structure 300 can be applied to the motherboard installation, graphics card installation, hard disk installation, etc. of the computer.

[0046] Figure 2 Given based on Figure 1 A schematic structural diagram of a battery box 200 formed by the box body 100 and the fixing structure 300 in an example of the present application. Figure 2 In the invention, three fixing structures 300 are arranged on the outer wall 102 of the box body 100. The three fixing structures 300 are arranged at intervals along the outer wall 102 of the box body 100, so as to substantially cover the outer wall 102. The three fixing structures 300 are also conducive to applying a more uniform force to the box body 100, avoiding the hidden danger of damage caused by excessive local force.

[0047] In addition, on the fixed structure 300 between the two fixed structures 300 at the two ends, two upper and lower structural members are correspondingly provided, such as the above-mentioned hanging member 201 and the bolt connection member 202 at the bottom, see Figure 2 and Figure 3 Depending on the situation, the fixing member can be provided with different structural members so as to connect and limit the fixing member with other members. For example, in addition to the above-mentioned hanging member 201 and bolt connector 202, a pin shaft, a bearing seat, etc. can also be provided.

[0048] The following will be combined with the attached drawings ( Figure 4 , Figure 5 as well as Figure 6 ), the fixed structure 300 in this application is described in detail.

[0049] Figures 4 to 6The fixing structure 300 is shown from different perspectives. As a whole, the fixing structure 300 is roughly U-shaped, or it can be considered as a roughly C-shaped. Therefore, from the perspective of the structural appearance, it generally has an opening, and is combined / connected with the box body 100 at the opening side.

[0050] The fixing structure 300 in the present application is an integrated structure, and therefore, there are no parts that are not substantially connected to each other. Figure 2 In the embodiment, the three fixing structures 300 are arranged in the box body 100 at intervals from each other, which means that the three fixing structures 300 are not connected to each other. Figure 7 . Figure 7 The figure shows the matching relationship between a split type fixing device and the outer wall 102 of the box 100 (only part of it is shown). The device includes a first part 601 and a second part 602, and the two parts are independent of each other and are not connected. Therefore, the device can also be considered as a split type fixing device including independent parts.

[0051] Different from Figure 7 The split type retainer shown, such as Figures 4 to 6 The fixing structure 300 in the example of the present application adopts an integrated structure, so its structural strength is relatively higher, so it can withstand greater forces. In addition, since the fixing structure 300 in the present application forms at least two interconnected connection positions with the box body 100, compared with Figure 7 The two parts have two independent connection positions, and the connection between the fixing structure 300 and the box body 100 of the present application is more secure.

[0052] See also Figure 4 , as a whole, the fixed structure 300 mainly includes three parts, namely, the first connector 301, the transition body 303 and the second connector 302, and the three are connected in sequence, and the first connector 301 and the second connector 302 are arranged roughly opposite to each other. The fixed structure 300 is connected to different parts of the box body 100 through the first connector 301 and the second connector 302 respectively. That is, the first connector 301 is combined with the first position of the box body 100; the second connector 302 is combined with the first position of the box body 100 and the second position, and the first position and the second position are adjacent to each other. In the example figure, the fixed structure 300 is a curved plate with a relatively large length and a relatively small thickness. Therefore, for example, it can be considered to be formed by appropriately bending a flat plate. In actual production, it can be made together with the box body 100 by injection molding, extrusion molding, etc.

[0053] The fixing structure 300 also has a plurality of connection holes 3031, for example, at least two, arranged on the second connecting body 302. Moreover, among the connection holes 3031 arranged on the second connecting body 302, there are at least two holes with different purposes. For example, one of the connection holes 3031 is provided with a thread 3032. Thus, the connection hole 3031 with the thread 3032 can be connected to other structures by bolts, studs, etc. In other words, among all the connection holes 3031, at least one is unthreaded, and at the same time at least one is threaded 3032. Therefore, when the box 100 is connected to other structures, a threaded hole and an unthreaded hole can be correspondingly arranged in the aforementioned other structures. Therefore, when the box 100 is connected to the "other structures", the bolts can be connected from the front or back. Among them, the front connection is, for example, the bolt passes through the unthreaded hole of the second connecting body 302, and the threaded hole on the other structure is threaded. Correspondingly, the reverse connection is, for example, a bolt passing through a non-threaded hole of other structures and being threadedly connected with a threaded hole on the second connecting body 302 .

[0054] The connection hole 3031 with the thread 3032 provided on the second connection body 302 can be implemented by making a thread on the inner wall of the connection hole 3031, and the latter is implemented by installing or fixing a nut in the connection hole 3031. The nut can be sunken and buried in the connection hole 3031, or partially buried in the connection hole 3031 and partially exposed from the connection hole 3031.

[0055] The transition body 303 of the fixed structure 300 can be straight or bent. In the example of the present application, a bent shape is selected. When the transition body 303 of the fixed structure 300 is selected to be straight, in order to reserve operating space, it may be necessary to increase the structural dimensions of the first connecting body 301 and the second connecting body 302, for example, the length relative to the outer wall 102 of the box body 100.

[0056] The bent transition body 303 can be relatively reasonably adjusted in its specific final structure and form according to the connection mode and position of the first connector 301 and the second connector 302 during manufacturing, so it is beneficial to release internal stress and improve its fatigue resistance. For example, the transition body 303 may include a first end 401, a bent portion 402 and a second end 403 connected in sequence. Among them, the first end 401 is connected to the first connector 301, and the second end 403 is connected to the second connector 302. Accordingly, the bending mode of the transition body 303 can also be selectively controlled by correspondingly controlling the shape of the bent portion 402 and changing the positions of the two ends relative to the bent portion 402.

[0057] Therefore, when manufacturing the fixed structure 300, the layout of the first end 401 and the second end 403 of the transition body 303 can be appropriately considered and adjusted. In some examples, the transition body 303 is bent in an arc shape, and accordingly, the arc region of the transition body 303 is located at the bending portion 402 of the transition body 303. The bending manner of the transition body 303 can be described by the arrangement of the first end 401 and the second end 403 thereof, for example, the second connector 302 and the second end 403 are arranged in a crisscross pattern. Figure 2 As shown, the second connector 302 extends substantially in the horizontal direction, while the second end 403 extends substantially in the vertical direction, that is, the two are arranged substantially at a right angle A. At the same time, the first connector 301 can be arranged tilted upward, while the first end 401 is tilted downward, and the two can be arranged substantially at an acute angle B, and the angle C between the first end 401 and the second end 403 is an obtuse angle, as shown in FIG. Figure 4 shown.

[0058] By controlling the distribution between the first end 401, the bent portion 402 and the second end 403 of the transition body 303, the surface transition can be smoother and more natural, thereby reducing the excessive concentration of internal stress, making it less prone to damage. In addition, by controlling the structure of the transition body 303 as described above, its usage can also be changed. For example, the first connecting body 301 and the first end 401 are arranged in an inclined shape, so they can be used as the basis for hanging other structures; the second connecting body 302 and the second end 403 are arranged in a criss-cross pattern, so they can be fixed by fasteners such as bolts.

[0059] Correspondingly, based on the consideration of convenient operation, the transition body 303 is penetrated by a through hole 3033 extending from the inner surface to the outer surface, that is, the through hole 3033 is penetrated along the thickness direction. The through hole 3033 can be used to cooperate with the hanging member 201, and can also be used as a passage through which the connecting hole 3031 of the bolt connector 202 and the second connecting body 302 pass. Figure 2 and Figure 3 .

[0060] The through hole 3033 can be arranged at the first end 401 of the transition body 303, or at the transition part or the second end 403, and can be selected according to different connection requirements. In the example of the present application, as an alternative solution, the transition body 303 is provided with a through hole 3033 extending from the inner surface to the outer surface, and the through hole 3033 extends from the first end 401 through the bending part 402 to the second end 403. In this way, due to the arrangement of the through hole 3033, the suspension member 201 and the bolt connector 202 can be arranged on the fixed structure 300 at the same time, and the mass of the fixed structure 300 can be reduced to a certain extent. Further, the configuration form of the through hole 3033 can also be adjusted. For example, in the example, the through hole 3033 is selected to have a narrow hole 501 located at the first end 401 and a wide hole 502 located at the second end 403, and the width of the narrow hole 501 is less than the width of the wide hole 502. Therefore, the through hole 3033 is roughly a "T"-shaped structure. The hanging member 201 (also a T-shaped structure) can be inserted into the through hole 3033 from the wide hole 502 , and then be limited and clamped at the narrow hole 501 .

[0061] In addition, since the second connecting body 302 of the fixing structure 300 is provided with the connecting hole 3031, when the through hole 3033 is provided, the position of the through hole 3033 can be adjusted accordingly by considering the usage of the connecting hole 3031. Figure 2 There are two connection holes 3031, one is a hole without threads (first hole), and the other is a hole with threads 3032 (second hole). The first hole can be directly opposite to the aforementioned through hole 3033, so that the bolt connector 202 can pass through and be inserted into the first hole. At the same time, since the second hole is for bolts to be inserted from other structures (such as the frame on which the battery box 200 is installed) and threadedly connected, the position of the fixing structure 300 corresponding to the second hole does not need to be provided with the aforementioned through hole 3033. In other words, the through hole 3033 can avoid the position of other holes that are used in the same way as the second hole.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fixing structure, used to be set in a box so as to carry or fix the battery through the box, characterized in that: The fixed structure comprises: A first connector configured to be coupled to a first position of the housing; A second connecting body opposite to the first connecting body, configured to be coupled to a second position of the box body adjacent to the first position, the second connecting body having at least two connecting holes, at least one of the at least two connecting holes being provided with a thread; A transition body, and its two ends are respectively connected to the first connecting body and the second connecting body, the transition body has an inner surface and an outer surface opposite to the inner surface, and the transition body is configured to face the box body with the inner surface, wherein the transition body is straight or bent.

2. The fixing structure according to claim 1, characterized in that: The transition body is in a bent shape, and the transition body is bent in an arc shape.

3. The fixing structure according to claim 2, characterized in that: The transition body includes a first end, a bending portion and a second end which are connected in sequence, wherein the first end is connected to the first connecting body, the second end is connected to the second connecting body, and the arc region of the transition body is located at the bending portion.

4. The fixing structure according to claim 3, characterized in that: The second connector and the second end are arranged in a crisscross pattern.

5. The fixing structure according to claim 4, characterized in that: An angle formed by the first end and the second end on the inner surface is an obtuse angle.

6. The fixing structure according to any one of claims 1 to 5, characterized in that: The transition body is penetrated by a through hole extending from the inner surface to the outer surface.

7. The fixing structure according to any one of claims 3 to 5, characterized in that: The transition body is penetrated by a through hole extending from the inner surface to the outer surface, and the through hole extends from the first end portion through the bending portion to the second end portion.

8. The fixing structure according to claim 7, characterized in that: The through hole has a narrow hole located at the first end and a wide hole located at the second end, and a width of the narrow hole is smaller than a width of the wide hole.

9. A battery box, characterized in that: include: A box body having an internal cavity; The fixing structure according to any one of claims 1 to 8; The fixing structure is fixed to the outer wall of the box.

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