Battery pack frame and battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack frame and a battery pack, the battery pack frame comprises: a box body, which is enclosed by a frame, and an accommodating space is formed in the box body; the supporting beam is arranged in the box body, and at least one end of the supporting beam is connected with the frame; the connecting piece is connected to the supporting beam and the frame, and the connecting piece comprises a first connecting part, a second connecting part and a third connecting part which are connected in sequence; the first connecting part is welded to the top end face of the supporting beam, and the third connecting part is attached to the frame and fixedly connected with the frame. One end of the second connecting part is connected with the first connecting part, and the other end of the second connecting part is connected with the third connecting part. By arranging the connecting piece, the firmness of connection between the first connecting part and the supporting beam is enhanced, then the first connecting part and the third connecting part are connected through the second connecting part, and the stability of connection between the frame and the supporting beam can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack frame and a battery pack. Background Art

[0002] With the development and progress of technology, the application of new energy equipment such as electric vehicles has become increasingly widespread. In new energy equipment such as electric vehicles, batteries are important components. Usually, batteries are installed in battery pack frames in new energy equipment such as electric vehicles. The battery pack frame usually includes a frame and a support beam installed inside the frame.

[0003] At present, the support beam and the frame are usually fixed by welding. When the support beam and the frame are fixed by welding, the end of the support beam near the frame is directly welded to the frame. Since welding will cause a large stress in the weld between the support beam and the frame, the connection strength is weak.

[0004] Therefore, the overall structural strength of the current battery pack frame is relatively weak. If the battery pack is hit, the battery pack frame is easily deformed and the welds are easily broken, resulting in low safety of the battery pack. Utility Model Content

[0005] In view of this, the utility model provides a battery pack frame and a battery pack to solve the problem that the overall structural strength of the battery pack frame is weak, resulting in low safety of the battery pack.

[0006] In a first aspect, the utility model provides a battery pack frame, the battery pack frame comprising:

[0007] A box body, which is surrounded by a frame, and a containing space is formed inside the box body;

[0008] A support beam is disposed in the box, and at least one end of the support beam is connected to the frame;

[0009] A connecting member connected to the support beam and the frame, the connecting member comprising a first connecting portion, a second connecting portion and a third connecting portion connected in sequence;

[0010] The first connection part is welded on the top end surface of the support beam, the third connection part is attached to the frame and fixedly connected to the frame; one end of the second connection part is connected to the first connection part, and the other end of the second connection part is connected to the third connection part;

[0011] Two ends of the second connection portion are respectively in contact with the support beam and the frame, and an angle A is formed between a plane where the second connection portion is located and an extension direction of the support beam, and 15°≤A≤75° is satisfied.

[0012] Beneficial effects: The embodiment of the utility model connects the first connection part with the support beam by setting a connecting piece, so that the connection between the first connection part and the support beam is more stable, and the firmness of the connection between the first connection part and the support beam is strengthened. In addition, the embodiment of the utility model directly adheres and connects the third connection part to the frame by setting a third connection part, which not only enhances the local strength of the frame, but also further enhances the overall structural strength of the battery pack frame. At the same time, the embodiment of the utility model further enhances the stability of the connection between the frame and the support beam by setting a second connection part to connect the first connection part with the third connection part, thereby improving the overall structural strength of the battery pack frame and further improving the safety of the battery pack. Within the range of the angle A, the overall stress distribution of the battery pack frame can be optimized, and the connection strength between the frame and the support beam can be strengthened, so that the battery pack frame can more effectively resist twisting and bending.

[0013] In a second aspect, the utility model provides a battery pack, including: a battery pack and a battery pack frame, wherein the battery pack frame is used to place the battery pack.

[0014] Because the battery pack includes a battery pack frame, it has the same effect as the battery pack frame and is not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a schematic diagram of the overall structure of the battery pack in the embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the battery pack frame in the embodiment of the utility model;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of part B;

[0019] Figure 4 For Figure 3 Schematic diagram of the structure after welding is completed;

[0020] Figure 5 This is a schematic diagram of the structure of the connecting member in the first direction in an embodiment of the utility model;

[0021] Figure 6 It is a schematic structural diagram of the connecting member in the second direction in an embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Box body; 11. Frame; 2. Support beam; 3. Connector; 31. First connecting part; 311. First connecting plate; 312. Second connecting plate; 32. Second connecting part; 33. Third connecting part; 34. Welding hole; 4. Battery pack; 5. Connection weld mark. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components, it can be a wireless connection, or it can be a wired connection. For ordinary workers in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] With the development and progress of technology, the application of new energy equipment such as electric vehicles has become increasingly widespread. In new energy equipment such as electric vehicles, batteries are important components. Usually, batteries are installed in battery pack frames in new energy equipment such as electric vehicles. The battery pack frame usually includes a frame and a support beam installed inside the frame.

[0029] At present, welding is usually used to fix the support beam and the frame. When welding is used to fix, the end of the support beam close to the frame is directly welded to the frame. Since welding will cause greater stress in the weld between the support beam and the frame, the connection strength is weak. Therefore, the overall structural strength of the battery pack frame is currently weak. If the battery pack is hit, the battery pack frame is easily deformed and the welds are easily broken, resulting in low safety of the battery pack.

[0030] In view of this, the utility model provides a battery pack frame and a battery pack to solve the problem that the overall structural strength of the battery pack frame is weak, resulting in low safety of the battery pack.

[0031] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0032] According to an embodiment of the present utility model, on one hand, a battery pack frame is provided, the battery pack frame comprising a box body 1, a support beam 2 and a connecting member 3.

[0033] Specifically, in the embodiment of the present utility model, Figure 2 As shown, the box body 1 is surrounded by a frame 11, for example, it can be surrounded by four, five, or six frames. This embodiment is only an example of the number of frames 11, and those skilled in the art can change it according to actual conditions as long as the same technical effect is achieved. A accommodating space is formed in the box body 1. As the basis of the entire battery pack frame, the box body 1 is generally a rectangular structure, and the interior of the box body 1 is surrounded to form a accommodating space, which can be a closed or semi-enclosed space, and the accommodating space is used to install the components of the battery pack 4 and the battery pack. Therefore, the frame 11 not only provides an installation position for the battery pack, but also provides physical protection for the battery pack to prevent external impacts from directly acting on the battery pack.

[0034] Further, in the embodiment of the present utility model, if Figure 2As shown, the support beam 2 is arranged in the box body 1, and at least one end of the support beam 2 is connected to the frame 11, and the other end of the support beam 2 can be connected to other beams inside the box body 1, and can also be connected to the frame 11 on the other side. For the connection method of the other end of the support beam 2, conventional welding can be adopted, and the fixing method of bolts can also be adopted. For example, when the other end of the support beam 2 can be connected to other beams inside the box body 1, the other end of the support beam 2 can be closed with a fixing plate, and then screw holes are respectively opened at the corresponding positions of the fixing plate and other beams. After the bolts pass through the screw holes, the support beam 2 and other beams are fixed. Of course, the number and position of the screw holes can be changed by those skilled in the art according to the actual situation. This embodiment is only an example, and it can achieve the same technical effect. In this embodiment, only welding is used for explanation.

[0035] Further, in the embodiment of the present utility model, if Figure 3 As shown, the connecting member 3 is connected to the support beam 2 and the frame 11, and the connecting member 3 includes a first connecting portion 31, a second connecting portion 32 and a third connecting portion 33 connected in sequence. The first connecting portion 31, the second connecting portion 32 and the third connecting portion 33 can also be connected by welding, or by other fixing methods, such as a fixing method using a buckle slot or a fixing method using a screw hole. Of course, this embodiment is only an example of the connection of the various parts on the connecting member 3, but it is not limited to this. Those skilled in the art can make changes according to actual conditions as long as the same technical effect can be achieved.

[0036] Specifically, the first connection portion 31 is welded to the top end surface of the support beam 2, thereby improving the connection strength between the support beam 2 and the first connection portion 31. Figure 3 As shown, the third connection portion 33 is attached to the frame 11 and is fixedly connected to the frame 11. Figure 3 and Figure 4 As shown, the two ends of the second connection portion 32 are respectively in contact with the support beam 2 and the frame 11. Figure 3 and Figure 4 As shown, since the two ends of the second connection part 32 are obliquely overlapped on the frame 11 and the support beam 2, the two ends of the second connection part 32 can be directly welded to the frame 11 and the support beam 2 respectively, so that the second connection part 32 can serve as a reinforcement between the support beam 2 and the frame 11. At the same time, the second connection part 32 can also strengthen the connection relationship between the first connection part 31 and the third connection part 33, thereby further improving the structural strength of the battery pack frame.

[0037] During actual use, since the third connection part 33 is stably connected to the frame 11, when the outer side of the frame 11 corresponding to the third connection part 33 is impacted by external force, the second connection part 32 will prevent the third connection part 33 and the frame 11 from deforming inward under the abutment of the first connection part 31, thereby preventing the weld between the frame 11 and the support beam 2 from cracking under the impact of external force, thereby improving the overall structural strength of the battery pack frame and ensuring the overall stability of the battery pack frame.

[0038] The embodiment of the utility model provides a connecting member 3 to connect the first connecting portion 31 with the support beam 2, so that the connection between the first connecting portion 31 and the support beam 2 is more stable, and the firmness of the connection between the first connecting portion 31 and the support beam 2 is strengthened. In addition, the embodiment of the utility model provides a third connecting portion 33 to directly attach and connect the third connecting portion 33 to the frame 11, which not only enhances the local strength of the frame 11, but also further enhances the overall structural strength of the battery pack frame. At the same time, the embodiment of the utility model provides a second connecting portion 32 to connect the first connecting portion 31 with the third connecting portion 33, which can further enhance the stability of the connection between the frame 11 and the support beam 2, thereby improving the overall structural strength of the battery pack frame and further improving the safety of the battery pack 4.

[0039] Furthermore, in an optional embodiment, the support beam 2 is fixed to the frame 11 by welding and forms a connection weld mark 5 at the welding position, and the second connection portion 32 is spaced apart from the connection weld mark 5 .

[0040] In this way, the embodiment of the utility model arranges the second connection part 32 and the connection weld mark 5 at an interval, and the second connection part 32 obliquely supports the support beam 2 and the frame 11, so that the second connection part 32, the support beam 2 and the frame 11 form a stable triangular structure, which can effectively resist twisting and bending, improve the overall mechanical properties, and further strengthen the stability of the connection between the frame 11 and the support beam 2. At the same time, the connection position of the second connection part 32 can completely avoid the connection weld mark 5 between the support beam 2 and the frame 11, thereby avoiding affecting the weld stress between the support beam 2 and the frame 11.

[0041] Further, in an optional embodiment, two ends of the second connecting portion 32 are respectively in contact with the support beam 2 and the frame 11, such as Figure 3 As shown, the angle A formed between the plane where the second connection portion 32 is located and the extension direction of the support beam 2 satisfies 15°≤A≤75°. Within this angle range, the stress distribution of the battery pack frame as a whole can be optimized, and the connection strength between the frame 11 and the support beam 2 is enhanced, so that the battery pack frame can more effectively resist twisting and bending.

[0042] Specifically, the angle selection is a comprehensive consideration, and such a design can ensure that sufficient structural strength is maintained while reducing weight. A smaller angle can improve the rigidity of the structure, while a larger angle may be beneficial to the distribution of materials and stress dispersion, and a balance can be found between the two.

[0043] Further, in an optional embodiment, as Figure 5 As shown, the minimum spacing between the end where the second connection part 32 is connected to the first connection part 31 and the end where the second connection part 32 is connected to the third connection part 33 is L, and satisfies: 10mm≤L≤50mm. The length of the second connection part 32 requires consideration of the material, angle, and thickness of the connector 3, and the most suitable length of the second connection part 32 is selected according to the actual application. Otherwise, if the second connection part 32 is too long, it will cause increased stress and cause the entire connector 3 to break. If it is too short, it will not play a certain connecting and supporting role, affecting the overall structural strength of the connector 3. When the angle remains unchanged, the size of the spacing will affect the height of the support beam 2, and then the height of the support beam 2 will affect the overall strength of the battery pack frame.

[0044] Of course, the specific method for selecting the length of the second connecting portion 32 is not elaborated in this embodiment, and those skilled in the art can measure and select it according to actual conditions, as long as the same technical effect can be achieved.

[0045] Further, in an optional embodiment, at least one reinforcing rib is provided on the end surface of the second connection portion 32 close to the support beam 2, one end of the reinforcing rib is connected to the support beam 2, and the other end of the reinforcing rib is connected to the frame 11. Each reinforcing rib is still spaced apart from the connection weld 5.

[0046] The embodiment of the utility model further improves the local strength and stability by providing a plurality of reinforcing ribs on the end surface of the second connection portion 32 close to the support beam 2, especially in the connection area between the support beam 2 and the frame 11. These reinforcing ribs can effectively conduct and disperse stress, avoid local overload, and thus enhance the durability and safety of the entire frame. In addition, considering that the battery pack frame needs to withstand greater mechanical stress and possible environmental factors such as temperature changes and corrosion, its material can be selected from high-strength steel, aluminum alloy, etc., so as to ensure the normal performance and service life of the battery pack 4.

[0047] Furthermore, in an optional embodiment, the first connection part 31, the second connection part 32 and the third connection part 33 are an integral structure. For an integral structure, it can be formed by pouring or casting, which means that the first connection part 31, the second connection part 32 and the third connection part 33 are an indivisible whole without an independent joint interface. Then, the integral structure can significantly improve the overall stability, rigidity and structural strength of the connector 3, because there are no additional connection points, reducing the risk of structural instability caused by loose joints or weld stress concentration. At the same time, reducing the connection points usually means improving the durability and service life of the connector 3, and the connector 3 will not need to be replaced due to joint breakage or weld breakage. In addition, the connector 3 can be manufactured and used as a single component, thereby simplifying the production and assembly process, possibly reducing assembly steps and time, and also reducing the probability of assembly errors.

[0048] Further, in an optional embodiment, as Figures 3 to 6 As shown, the first connection portion 31 includes a first connection plate 311 and at least one second connection plate 312 .

[0049] Specifically, in the embodiment of the utility model, the first connecting plate 311 is connected to the second connecting portion 32, and the first connecting plate 311 is welded to the top end surface of the support beam 2, so that the first connecting plate 311 is stably connected to the top end surface of the support beam 2. At the same time, relying on the stable connection between the first connecting plate 311 and the support beam 2, when the outer side surface of the frame 11 corresponding to the third connecting portion 33 is impacted by external force, the second connecting portion 32 will prevent the third connecting portion 33 and the frame 11 from deforming inwards under the abutment of the first connecting plate 311, thereby preventing the weld between the frame 11 and the support beam 2 from cracking under the impact of external force, thereby improving the overall structural strength of the battery pack frame and ensuring the overall stability of the battery pack frame.

[0050] Furthermore, the first connecting plate 311 can also be set to a collapsible structure. When the external force impact on the frame 11 is sufficient to drive the support beam 2 to deform through the first connecting plate 311, in order to ensure the overall stability of the frame 11, the external force can directly push the frame 11 and push the second connecting part 32, so that the second connecting part 32 squeezes the first connecting plate 311, causing the first connecting plate 311 to collapse, thereby unloading the external force to the first connecting plate 311. This can ensure the stability of the support beam 2, ensure the normal operation of the battery pack frame, and then ensure the stable operation of the battery pack 4.

[0051] Further, in the embodiment of the present utility model, if Figures 3 to 6As shown, the second connecting plate 312 is located on at least one side of the first connecting plate 311 and is connected to the first connecting plate 311 at the same time, so as to form a clamping groove suitable for the support beam 2 to be embedded with the first connecting plate 311, and the second connecting plate 312 is welded to the two side end faces of the support beam 2. Since two second connecting plates 312 are arranged on both sides of the first connecting plate 311, they are not only connected to the first connecting plate 311 respectively, but also form a stable three-sided support structure. The second connecting plate 312 is also connected to the two side end faces of the support beam 2 by welding, which not only enhances the lateral stability, but also ensures the rigidity of the entire structure.

[0052] Furthermore, in the embodiment of the utility model, the first connecting plate 311 and the second connecting plate 312 are an integral structure. The first connecting plate 311 and the second connecting plate 312 are arranged as an integral structure, which is conducive to improving the overall strength and reliability of the first connecting portion 31, especially when the frame 11 is subjected to external force impact, through the connection layout of the integral structure, the stress can be effectively dispersed to prevent the local stress of the first connecting portion 31 from being too large, thereby ensuring the stability of the overall structure of the battery pack frame.

[0053] Further, in an optional embodiment, as Figure 3 and Figure 4 As shown, Figures 4 to 6 As shown in the direction of the dotted arrow, the direction perpendicular to the side of the support beam 2 is defined as the first direction, and the first connecting plate 311 is provided with the second connecting plate 312 on both sides of the first direction, and the second connecting plates 312 on both sides and the first connecting plate 311 are enclosed to form a snap-in groove suitable for the support beam 2 to be embedded. In this way, when the first connecting portion 31 is fixed to the support beam 2 through the snap-in groove, it can also be snapped to the bottom of the support beam 2 through the second connecting plate 312, so that the first connecting portion 31 is stably connected to the support beam 2, thereby ensuring that the connecting member 3 stably connects the support beam 2 to the frame 11, and also improves the stability and durability of the entire battery pack frame.

[0054] Further, in an optional embodiment, as Figures 3 to 5 As shown, welding holes 34 are formed on the first connecting plate 311 and the second connecting plate 312 , and the welding holes 34 are extended along the extension direction of the second connecting plate 312 .

[0055] like Figures 3 to 5As shown, two welding holes 34 can be opened on the first connecting plate 311 and each second connecting plate 312. Of course, those skilled in the art can change the number of welding holes 34 according to actual conditions. For example, three, four, five, etc. welding holes 34 can be opened. This embodiment is only an example for illustration, but it is not limited to this. Those skilled in the art can make changes according to actual conditions as long as the same technical effect can be achieved.

[0056] In actual application, technicians can first simply fix the first connection part 31 on the support beam 2, and then fit the third connection part 33 with the frame 11. After determining the position, the connection between the first connection part 31 and the support beam 2 can be directly welded, and then the gap between the first connection part 31 and the support beam 2 in the welding hole 34 can be welded, so as to further strengthen the connection strength between the first connection part 31 and the support beam 2.

[0057] Furthermore, in an optional embodiment, the area of ​​the third connecting portion 33 is 200 mm 2 Up to 800mm 2 If the area is smaller than this range, the overall structural strength of the battery pack frame may be weak due to the small area. If the area is larger than this range, the area may be too large to occupy too much usable area in the battery pack frame.

[0058] In a second aspect, the utility model further provides a battery pack 4, which includes: a battery group and a battery pack frame as described in any of the above embodiments, wherein the battery pack frame is used to place the battery group.

[0059] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery pack frame, characterized in that: include: A box body (1) is enclosed by a frame (11), and a receiving space is formed inside the box body (1); A support beam (2) is arranged in the box body (1), and at least one end of the support beam (2) is connected to the frame (11); A connecting member (3) connected to the support beam (2) and the frame (11), the connecting member (3) comprising a first connecting portion (31), a second connecting portion (32) and a third connecting portion (33) which are connected in sequence; The first connection part (31) is welded to the top end surface of the support beam (2); the third connection part (33) is attached to the frame (11) and is fixedly connected to the frame (11); one end of the second connection part (32) is connected to the first connection part (31), and the other end of the second connection part (32) is connected to the third connection part (33); The two ends of the second connection portion (32) are respectively in contact with the support beam (2) and the frame (11); an angle A is formed between the plane where the second connection portion (32) is located and the extension direction of the support beam (2), and 15°≤A≤75° is satisfied.

2. The battery pack frame according to claim 1, characterized in that: The support beam (2) and the frame (11) are fixed by welding and a connection weld mark (5) is formed at the welding position, and the second connection portion (32) is spaced apart from the connection weld mark (5).

3. The battery pack frame according to claim 2, characterized in that: The minimum distance between one end of the second connection part (32) connected to the first connection part (31) and one end of the second connection part (32) connected to the third connection part (33) is L, and satisfies: 10mm≤L≤50mm.

4. The battery pack frame according to claim 3, characterized in that: At least one reinforcing rib is provided on the end surface of the second connecting portion (32) close to the support beam (2), one end of the reinforcing rib is connected to the support beam (2), and the other end of the reinforcing rib is connected to the frame (11).

5. The battery pack frame according to any one of claims 1 to 4, characterized in that: The first connecting portion (31) comprises: A first connecting plate (311) is welded to the top end surface of the support beam (2) and connected to the second connecting portion (32); At least one second connecting plate (312) is located on at least one side of the first connecting plate (311), and the second connecting plate (312) is welded to the side end surface of the support beam (2).

6. The battery pack frame according to claim 5, characterized in that: The first connecting plate (311) and the second connecting plate (312) are an integral structure.

7. The battery pack frame according to claim 6, characterized in that: A direction perpendicular to the side of the support beam (2) is defined as a first direction, and the first connecting plate (311) is provided with the second connecting plate (312) on both sides of the first direction, and the second connecting plates (312) on both sides are combined with the first connecting plate (311) to form a snap-in groove suitable for the support beam (2) to be embedded.

8. The battery pack frame according to claim 7, characterized in that: The first connecting plate (311) and the second connecting plate (312) are both provided with welding holes (34), and the welding holes (34) are extended along the extension direction of the second connecting plate (312).

9. The battery pack frame according to claim 7 or 8, characterized in that: The area of ​​the third connecting portion (33) is 200 mm 2 Up to 800mm 2 between.

10. A battery pack, characterized in that: include: A battery pack and a battery pack frame as claimed in any one of claims 1 to 9, wherein the battery pack frame is used to place the battery pack.

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