Battery box and battery pack

Abstract

The utility model relates to battery technology field provides a kind of battery box and battery package.The battery box includes: bottom plate, frame and support, frame is located in the bottom plate side, with bottom plate and is formed around the containing cavity, for accommodating battery module;Support includes first fixed part, second fixed part and support part, support part is obliquely arranged between first fixed part and second fixed part, the first end of support part is connected with first fixed part, the second end of support part is connected with second fixed part, first fixed part is connected with bottom plate, second fixed part is connected with frame.The utility model is connected with first fixed part and second fixed part respectively with both ends of support part, first fixed part is connected with bottom plate, second fixed part is connected with frame, frame is supported, the support strength of battery box is strengthened, the extrusion and collision capacity of battery package is improved, avoid battery package inside short circuit, outside short circuit, insulation failure and battery module leakage etc., to improve the security of battery package.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery box and battery pack. Background Technology

[0002] A battery pack typically consists of a housing and core components such as battery modules housed within the housing. The housing serves as the load-bearing and protective structure for the battery modules. It must not only provide a stable installation environment for the battery modules but also withstand various mechanical impacts and compressions from the outside world under complex and ever-changing actual operating conditions, ensuring the integrity of the overall battery pack structure and the reliability of its functions.

[0003] During the battery pack compression test, the low strength of the casing made it unable to effectively resist external forces, resulting in a large intrusion of the compression column. This excessive intrusion directly affected the internal battery modules, subjecting them to pressure exceeding their design tolerance.

[0004] When a battery module is severely compressed, its internal structure is damaged, leading to a series of serious consequences that endanger the safety of the battery pack. Firstly, the positive and negative electrode materials inside the battery module may shift, deform, or even come into direct contact due to compression, causing an internal short circuit. An internal short circuit can cause a sharp rise in local temperature, potentially leading to thermal runaway, generating a large amount of heat and flammable gases, seriously threatening the safety of the battery pack and surrounding equipment. Secondly, compression can also damage the battery pack's outer casing, causing accidental contact between the battery's internal components and external conductive parts, resulting in an external short circuit, which can also cause serious electrical faults and safety hazards. Furthermore, compression can damage the battery's internal insulation layer, leading to insulation failure and increasing the risk of leakage, affecting not only the normal operation of the battery pack but also potentially threatening the personal safety of operators. More seriously, excessive squeezing can also cause the battery cell casing inside the battery to crack, leading to electrolyte leakage. Electrolyte leakage will not only corrode other components inside the battery pack, reducing the overall performance and lifespan of the battery pack, but also the electrolyte usually has flammable, explosive, and toxic properties. Once leaked, it can easily cause catastrophic accidents such as fires and explosions when it comes into contact with a source of ignition or under certain conditions. Utility Model Content

[0005] This utility model provides a battery box and battery pack to solve the problem that the existing box has low strength, which leads to a large intrusion of the extrusion column during the extrusion test of the battery pack, resulting in severe compression of the internal battery modules, which in turn causes internal short circuits, external short circuits, insulation failure, or leakage of battery modules, thus affecting the safety of the battery pack.

[0006] This utility model provides a battery box, including: a base plate, a frame, and a support member; the frame is disposed around the base plate, forming a receiving cavity with the base plate for accommodating a battery module; the support member includes a first fixing part, a second fixing part, and a supporting part, the supporting part being inclinedly disposed between the first fixing part and the second fixing part, a first end of the supporting part being transitionally connected to the first fixing part, a second end of the supporting part being transitionally connected to the second fixing part, the first fixing part being connected to the base plate, and the second fixing part being connected to the frame.

[0007] According to the present invention, the angle between the top surface of the first fixing part and the top surface of the supporting part is α, 120°≤α≤150°, and the angle between the top surface of the second fixing part and the top surface of the supporting part is θ, θ=180°-α+90°.

[0008] According to the present invention, the distance between the projection of the first end of the support portion on the frame and the second end of the support portion is a, the distance between the projection of the second end of the support portion on the base plate and the first end of the support portion is b, the width of the support portion, the width of the first fixing portion and the width of the second fixing portion are all c, and the height of the frame is H, wherein 0.5H≤a≤0.8H, a≤b≤2a, 0.3b≤c≤0.5b, and 80mm≤H≤100mm.

[0009] According to the present invention, the length of the first fixing part is d1, 10mm≤d1≤15mm, and the length of the second fixing part is d2, 10mm≤d2≤15mm; or, the thickness of the support member is t, t≥1mm.

[0010] According to the present invention, the support member further includes a reinforcing part, which is disposed on at least one side of the support member.

[0011] According to the present invention, a battery box is provided, wherein the reinforcing part includes a first reinforcing part and a second reinforcing part, the first end of the first reinforcing part and the first end of the second reinforcing part are transitionally connected, the second end of the first reinforcing part is connected to the side of the support part near the first fixing part, and the second end of the second reinforcing part is connected to the side of the support part near the second fixing part.

[0012] According to the present invention, the included angle between the first reinforcing part and the second reinforcing part toward the supporting part is β, where 120°≤β≤150°.

[0013] According to the present invention, the lengths of the first reinforcing part and the second reinforcing part are equal.

[0014] According to the present invention, a battery housing is provided, wherein there are multiple support members, and the multiple support members are spaced apart in the receiving cavity along the length direction of the battery housing; and / or, the multiple support members are spaced apart in the receiving cavity along the width direction of the battery housing.

[0015] This utility model also provides a battery pack, including a battery module and a battery housing as described in any of the above claims, wherein the battery module is disposed within the receiving cavity.

[0016] The battery box and battery pack provided by this utility model have a frame and a bottom plate forming a cavity for accommodating battery modules. The two ends of the support part are respectively connected to the first fixing part and the second fixing part. The first fixing part is connected to the bottom plate, and the second fixing part is connected to the frame to support the frame, enhance the support strength of the battery box, improve the battery pack's resistance to compression and impact, and avoid internal short circuits, external short circuits, insulation failures, and battery module leakage, thereby improving the safety of the battery pack. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the battery box structure in Embodiment 1 of this utility model.

[0019] Figure 2 yes Figure 1 A magnified view of a portion of region A in the middle.

[0020] Figure 3 This is a structural schematic diagram of the support member in Embodiment 1 of this utility model.

[0021] Figure 4 This is a front view of the support member in Embodiment 1 of this utility model.

[0022] Figure 5 This is a left view of the support member in Embodiment 1 of this utility model.

[0023] Figure 6 This is a schematic diagram of the battery box structure in Embodiment 2 of this utility model.

[0024] Figure 7yes Figure 6 A magnified view of a portion of region B in the middle.

[0025] Figure 8 This is a schematic diagram of the support component in Embodiment 2 of this utility model.

[0026] Figure 9 This is a left view of the support member in Embodiment 2 of this utility model.

[0027] Figure label:

[0028] 10. Base plate; 20. Frame; 30. Support component; 31. First fixing part; 32. Second fixing part; 33. Support part; 34. Reinforcing part; 341. First reinforcing part; 342. Second reinforcing part. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0031] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0032] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0035] The following is combined with Figures 1-9 This invention describes the battery box and battery pack.

[0036] This utility model provides a battery box, including a base plate 10, a frame 20, and a support member 30. The frame 20 is disposed around the base plate 10, forming a receiving cavity with the base plate 10 for accommodating a battery module. The support member 30 includes a first fixing part 31, a second fixing part 32, and a support part 33. The support part 33 is inclinedly disposed between the first fixing part 31 and the second fixing part 32. The first end of the support part 33 is transitionally connected to the first fixing part 31, and the second end of the support part 33 is transitionally connected to the second fixing part 32. The first fixing part 31 is connected to the base plate 10, and the second fixing part 32 is connected to the frame 20.

[0037] In some embodiments of this utility model, the battery box further includes a cover plate, and the bottom of the frame 20 is connected to the base plate 10, such as by welding. The bottom of the frame 20 and the base plate 10 can also be integrally formed. When the battery module is placed in the receiving cavity enclosed by the frame 20 and the base plate 10, the cover plate covers the receiving cavity, wherein the periphery of the cover plate is connected to the top of the frame 20, thereby sealing the battery module in the receiving cavity.

[0038] In this embodiment of the invention, the support member 30 is inclinedly disposed within the receiving cavity. One side of the support member 30 is connected to the base plate 10, and the other side of the support member 30 is connected to the frame 20, thereby improving the supporting performance of the battery box. Specifically, as shown... Figures 1 to 3 As shown, the support member 30 includes a first fixing part 31, a support part 33, and a second fixing part 32. The first end of the support part 33 is welded to the first fixing part 31, and the first end of the support part 33 is transitionally connected to the first fixing part 31 with a radius of curvature greater than or equal to 1 mm (e.g., 1 mm, 2 mm, 4 mm) to prevent stress concentration at the connection point. The second end of the support part 33 is welded to the second fixing part 32, and the second end of the support part 33 is transitionally connected to the second fixing part 32 with a radius of curvature greater than or equal to 1 mm (e.g., 1 mm, 2 mm, 4 mm) to prevent stress concentration at the connection point. Furthermore, the first fixing part 31 is connected to the base plate 10 via welding, and the dimensions of the first fixing part 31 meet the welding requirements. The second fixing part 32 is connected to the frame 20 via welding, and the dimensions of the second fixing part 32 also meet the welding requirements. This allows the support member 30 to be tilted and fixed within the receiving cavity, enhancing the support strength of the battery box and improving the battery pack's resistance to compression and impact.

[0039] The battery box provided in this embodiment of the utility model has a cavity formed by the frame 20 and the bottom plate 10 for accommodating the battery module. The two ends of the support part 33 are respectively connected to the first fixing part 31 and the second fixing part 32. The first fixing part 31 is connected to the bottom plate 10, and the second fixing part 32 is connected to the frame 20 to support the frame 20, thereby enhancing the support strength of the battery box, improving the battery pack's resistance to compression and impact, and avoiding internal short circuits, external short circuits, insulation failures, and battery module leakage, thereby improving the safety of the battery pack.

[0040] like Figures 3 to 5 As shown, the first fixing part 31 and the second fixing part 32 extend toward the same side of the support part 33. The angle between the top surface of the first fixing part 31 and the top surface of the support part 33 is α, where 120°≤α≤150°, such as α being 120°, 130°, 135°, 140°, 150°, etc. The second fixing part 32 extends toward the top of the receiving cavity. The angle between the top surface of the second fixing part 32 and the top surface of the support part 33 is θ, where θ=180°-α+90°. In one embodiment, α is 120° and θ is 150°. In another embodiment, α is 150° and θ is 120°.

[0041] like Figure 2 , Figure 4 and Figure 5As shown, the distance between the projection of the first end of the support portion 33 onto the frame 20 and the second end of the support portion 33 is 'a'. It should be noted that the side where the first end of the support portion 33 is projected onto the frame 20 is the side where the second support portion 33 connects to the frame 20, and this distance 'a' is a vertical distance. The distance between the projection of the support portion 33 onto the base plate 10 and the first end of the support portion 33 is 'b'. The width of the support portion 33, the width of the first fixing portion 31, and the width of the second fixing portion 32 are 'c', as shown... Figure 4 As shown. The height of the frame 20 is H, which is the depth of the cavity, 80mm≤H≤100mm. For example, H can be 80mm, 88mm, 90mm, 95mm, 100mm, etc. It should be noted that H is set according to the thickness of the battery module, as long as it can accommodate the battery module.

[0042] Wherein, 0.5H ≤ a ≤ 0.8H, and a can be 0.5H, 0.53H, 0.6H, 0.65H, 0.7H, 0.78H, or 0.8H. a ≤ b ≤ 2a, and b can be a, 1.5a, 1.8a, etc. 0.3b ≤ c ≤ 0.5b, and c can be 0.3b, 0.35b, 0.4b, or 0.5b, etc. In one embodiment, H is 100mm; a is 0.5H, i.e., 50mm; b is 1.5a, i.e., 75mm; and c is 0.3b, i.e., 15mm.

[0043] In some embodiments of this utility model, the length of the first fixing part 31 is d1, 10mm≤d1≤15mm, such as d1 can be 10mm, 11mm, 12mm, 12.5mm, 13mm, 14mm, 15mm, etc. The length of the second fixing part 32 is d2, 10mm≤d1≤15mm, such as d2 can be 10mm, 11mm, 12mm, 12.5mm, 13mm, 14mm, 15mm, etc. It should be noted that the lengths of the first fixing parts 31 can be the same or different, which facilitates the connection of the first fixing part 31 to the base plate 10 by welding, and the welding of the second fixing part 32 to the frame 20.

[0044] In this embodiment of the utility model, the thickness of the support member 30 is t, that is, the thickness of the first fixing part 31, the thickness of the support part 33, and the thickness of the second fixing part 32 are all t, t≥1mm, such as 1mm, 2mm, 5mm, etc.

[0045] In some embodiments, the first fixing part 31, the support part 33, and the second fixing part 32 are integrally formed parts.

[0046] In some embodiments, the base plate 10 is provided with a reinforcing portion to enhance its strength and absorb energy during impacts or compressions. Furthermore, the first fixing portion 31 can be welded to the reinforcing portion. Figure 2 and Figure 7As shown, the reinforcing part is a reinforcing rib, which protrudes towards the outer wall surface of the base plate 10. A groove is formed on the side of the base plate 10 facing the receiving cavity, and the first fixing part 31 is welded to the bottom surface of the groove. It should be noted that when the first fixing part 31 is welded to the bottom surface of the groove, the projection of the support part 33 on the base plate is the projection on the bottom surface of the groove.

[0047] In any of the above embodiments, the support member 30 can be one or more, such as two, three, or five. In some embodiments, multiple support members 30 are spaced apart within the receiving cavity along the length direction of the battery case. To improve support strength, the multiple support members 30 can be evenly distributed along the length direction of the battery case. In other embodiments, multiple support members 30 are spaced apart within the receiving cavity along the width direction of the battery case. Figure 1 As shown, there are two support members 30, which are spaced apart within the receiving cavity along the width direction of the battery box. To improve support strength, multiple support members 30 can be spaced apart within the receiving cavity along the width direction of the battery box. In some embodiments, multiple support members 30 are spaced apart within the receiving cavity along the circumferential direction of the battery box, that is, multiple support members 30 are spaced apart within the receiving cavity along the length direction of the battery box and also spaced apart within the receiving cavity along the width direction of the battery box.

[0048] In any of the above embodiments, the support member 30 in the present invention further includes a reinforcing part 34, which is disposed on at least one side of the support member 33.

[0049] In some embodiments, the reinforcing portion 34 may be a reinforcing plate, which is disposed on at least one side of the supporting portion 33. In other embodiments, the reinforcing portion 34 may be an irregularly shaped structure, disposed on at least one side of the supporting portion 33. It should be noted that the structures of the reinforcing portions 34 on both sides of the supporting portion 33 may be the same or different.

[0050] like Figures 6 to 8 As shown, the reinforcing part 34 includes a first reinforcing part 341 and a second reinforcing part 342. The first end of the first reinforcing part 341 and the first end of the second reinforcing part 342 are transitionally connected, such as by welding. The second end of the first reinforcing part 341 is connected to the side of the support part 33 near the first fixing part 31, such as by welding. The second end of the second reinforcing part 342 is connected to the side of the support part 33 near the second fixing part 32. In one embodiment, the reinforcing part 34 is disposed on the top surface of the support part 33, that is, on the side of the support part 33 facing the opening of the receiving cavity.

[0051] The first reinforcing part 341 and the second reinforcing part 342 in this embodiment of the present invention can be integrally formed parts.

[0052] like Figure 8As shown, the second end of the first reinforcing part 341 is connected to the connection between the first fixing part 31 and the supporting part 33, and the second end of the second reinforcing part 342 is connected to the connection between the second fixing part 32 and the supporting part 33. This structure is more stable and has a better supporting effect.

[0053] like Figure 9 As shown, in this embodiment of the present invention, the included angle formed by the first reinforcing part 341 and the second reinforcing part 342 toward the supporting part 33 is β, 120°≤β≤150°, and β can be 120°, 130°, 135°, 140°, 150°, etc.

[0054] In some embodiments of this utility model, the lengths of the first reinforcing part 341 and the second reinforcing part 342 are equal, and the support member 30 has high stability and good support.

[0055] In any of the above embodiments, the support member 30 can be one or more, such as two, three, or five. In some embodiments, multiple support members 30 are spaced apart within the receiving cavity along the length direction of the battery case. To improve support strength, the multiple support members 30 can be evenly distributed along the length direction of the battery case. In other embodiments, multiple support members 30 are spaced apart within the receiving cavity along the width direction of the battery case. Figure 6 As shown, there are two support members 30, which are spaced apart within the receiving cavity along the width direction of the battery box. To improve support strength, multiple support members 30 can be spaced apart within the receiving cavity along the width direction of the battery box. In some embodiments, multiple support members 30 are spaced apart within the receiving cavity along the circumferential direction of the battery box, that is, multiple support members 30 are spaced apart within the receiving cavity along the length direction of the battery box and also spaced apart within the receiving cavity along the width direction of the battery box.

[0056] This utility model embodiment also provides a battery pack, including a battery module and a battery housing as described in any of the above embodiments, wherein the battery module is disposed within a receiving cavity.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery housing, characterized in that, include: Base plate; A frame is provided on the periphery of the base plate, forming a receiving cavity with the base plate for accommodating the battery module; The support member includes a first fixing part, a second fixing part, and a support part. The support part is inclinedly disposed between the first fixing part and the second fixing part. The first end of the support part is transitionally connected to the first fixing part, and the second end of the support part is transitionally connected to the second fixing part. The first fixing part is connected to the base plate, and the second fixing part is connected to the frame.

2. The battery housing according to claim 1, characterized in that, The angle between the top surface of the first fixing part and the top surface of the supporting part is α, 120°≤α≤150°, and the angle between the top surface of the second fixing part and the top surface of the supporting part is θ, θ=180°-α+90°.

3. The battery housing according to claim 1, characterized in that, The distance between the projection of the first end of the support portion onto the frame and the second end of the support portion is a, the distance between the projection of the second end of the support portion onto the base plate and the first end of the support portion is b, the width of the support portion, the width of the first fixing portion and the width of the second fixing portion are all c, and the height of the frame is H, wherein 0.5H≤a≤0.8H, a≤b≤2a, 0.3b≤c≤0.5b, and 80mm≤H≤100mm.

4. The battery housing according to claim 1, characterized in that, The length of the first fixing part is d1, 10mm≤d1≤15mm, and the length of the second fixing part is d2, 10mm≤d2≤15mm; Alternatively, the thickness of the support member is t, where t ≥ 1 mm.

5. The battery housing according to claim 1, characterized in that, The support member further includes a reinforcing portion, which is disposed on at least one side of the support portion.

6. The battery housing according to claim 5, characterized in that, The reinforcing part includes a first reinforcing part and a second reinforcing part. The first end of the first reinforcing part and the first end of the second reinforcing part are connected in transition. The second end of the first reinforcing part is connected to the side of the support part near the first fixing part. The second end of the second reinforcing part is connected to the side of the support part near the second fixing part.

7. The battery housing according to claim 6, characterized in that, The included angle between the first reinforcing part and the second reinforcing part toward the supporting part is β, where 120°≤β≤150°.

8. The battery housing according to claim 6, characterized in that, The lengths of the first reinforcing part and the second reinforcing part are equal.

9. The battery housing according to any one of claims 1 to 8, characterized in that, There are multiple support members, and the multiple support members are spaced apart in the receiving cavity along the length direction of the battery box; And / or, a plurality of the support members are spaced apart in the receiving cavity along the width direction of the battery housing.

10. A battery pack, characterized in that, It includes a battery module and a battery housing as described in any one of claims 1 to 9, wherein the battery module is disposed within the receiving cavity.

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