Vehicles and their battery devices

Abstract

This utility model discloses a battery device, including a housing and batteries disposed within the housing. The housing includes a base plate, on which structural beams and multiple batteries are disposed. The structural beams are T-shaped beams, each including a mounting portion and an isolation portion. The mounting portions are disposed on both sides of the isolation portion and connected to the base plate. The bottom of each battery is suspended from the top of the mounting portion, and the upper surface of the mounting portion is spaced a first distance D from the bottom of the battery. This battery device improves the utilization rate of the housing cavity, saves space, avoids the impact of the structural beams on the battery during use due to bumps, and improves battery safety performance. This utility model also discloses a vehicle.

Description

Technical Field

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

[0002] Cylindrical lithium-ion batteries (referred to as cylindrical batteries) have advantages such as high single-cell energy density, high consistency, and high production efficiency, and are widely used in new energy passenger vehicles, electric two-wheelers, power tools and other fields.

[0003] To reduce the increase in the height of the battery pack, the cylindrical cells within the pack can be arranged horizontally. Multiple cylindrical cells are stacked to form a battery pack, with different packs separated by structural beams. The bottom of the cylindrical cells is positioned close to the structural beams. To improve structural compactness, the structural beams are solid plate structures, with their bottom ends connected to the base plate of the battery pack via connecting flanges. The bottom of the cylindrical cells rests on the upper surface of the connecting flanges. Since the flanges are typically connected to the base plate of the battery pack via welding or connectors, even with countersunk connections, the weld marks or the top of the connectors are close to the bottom of the cylindrical cells. During use, bumps or vibrations can cause these weld marks or the top of the connectors to collide with the bottom of the cells, potentially damaging the battery surface and affecting its safety performance. Utility Model Content

[0004] In view of this, the present invention provides a battery device that improves the utilization rate of the housing cavity, saves space, avoids the impact of structural beams on the battery when it is bumpy during use, and improves the safety performance of the battery.

[0005] This utility model also provides a vehicle.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery device includes a housing and batteries disposed within the housing. The housing includes a base plate, on which structural beams and a plurality of batteries are disposed. The structural beams are T-shaped beams and include mounting portions and isolation portions. The mounting portions are disposed on both sides of the isolation portions and are connected to the base plate. The bottom of each battery is suspended above the top of the mounting portions, and the upper surface of the mounting portions is spaced a first distance D from the bottom of the batteries.

[0008] As can be seen from the above technical solution, the battery device provided by this utility model improves the utilization rate of the housing cavity, saves space, and increases the energy density of the battery device by suspending the bottom of the battery near the base plate above the mounting part. The upper surface of the mounting part of the structural beam is spaced a first distance from the bottom of the battery, thereby preventing the weld marks or the top of the connectors on the mounting part from colliding with the bottom of the battery near the base plate when the battery is subjected to bumps during use. This avoids the impact of the mounting part on the battery and improves the battery's safety performance.

[0009] This utility model also provides a vehicle, including a battery device, wherein the battery device is the aforementioned battery device.

[0010] The vehicle of this utility model includes the aforementioned battery device, and therefore has the advantages of the aforementioned battery device, which will not be repeated here. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the battery device provided in an embodiment of the present invention from one angle.

[0013] Figure 2 This is a structural schematic diagram of the battery device provided in an embodiment of the present invention from another angle;

[0014] Figure 3 Provided for an embodiment of this utility model Figure 2 A schematic diagram of the cross-sectional structure at position AA in the middle;

[0015] Figure 4 for Figure 3 A magnified structural diagram of part B after it has been rotated 90°.

[0016] Figure 5 This is a schematic diagram of the structure of the box provided in an embodiment of the present utility model;

[0017] Figure 6 A schematic diagram of the connection between the base plate and the structural beam provided in an embodiment of this utility model;

[0018] Figure 7 for Figure 6 A cross-sectional view of the CC position;

[0019] Figure 8This is a structural diagram of a structural beam provided in one embodiment of the present invention;

[0020] Figure 9 for Figure 8 A cross-sectional structural diagram of the structural beam provided in the embodiment;

[0021] Figure 10 This is a structural diagram of a structural beam provided in another embodiment of the present invention;

[0022] Figure 11 This is a structural diagram of the structural beam provided in the third embodiment of the present utility model.

[0023] in:

[0024] 1. Box body,

[0025] 101. Base plate; 1011. First surface; 1012. Second surface; 102. Bottom guard plate.

[0026] 2. Battery

[0027] 3. Structural beams,

[0028] 301. Isolation section; 3011. Back plate; 3012. Vertical beam; 302. Mounting section; 3021. Connecting plate; 3022. Horizontal beam; 303. End auxiliary plate; 304. Cavity. Detailed Implementation

[0029] This utility model discloses a battery device that improves the utilization rate of the housing cavity, saves space, avoids the impact of structural beams on the battery when it is bumpy during use, and improves the battery's safety performance.

[0030] This utility model also discloses a vehicle.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] See Figures 1 to 11The battery device of this utility model includes a housing 1 and multiple batteries 2 disposed within the housing 1. The housing 1 includes a base plate 101, on which structural beams 3 and multiple batteries 2 are disposed. The structural beams 3 are used to separate different battery packs, which are formed by arranging or stacking multiple batteries 2. The structural beams 3 are T-shaped beams, including mounting portions 302 and isolation portions 301. The mounting portions 302 are disposed on both sides of the isolation portions 301 and are used to connect to the base plate 101 to install the structural beams 3. The isolation portions 301 are used to separate the battery packs. The bottom of the battery 2 is suspended above the top of the mounting portion 302, rather than being vertically offset from the mounting portion 302, thus improving the utilization rate of the housing cavity of the housing 1 and avoiding space waste. The upper surface of the mounting portion 302 is spaced a first distance D from the bottom of the battery 2. Figure 4 As shown, the bottom of battery 2 here refers to the position of battery 2 near the bottom plate 101 after it is installed inside the housing 1.

[0033] Battery 2 is a cylindrical battery, placed horizontally with its axis parallel to the base plate 101. The cylindrical battery includes a bottom end and a top end. An explosion-proof valve is installed at the bottom end of the cylindrical battery to release gas in the event of thermal runaway of battery 2. The isolation section 301 of the structural beam 3 separates different battery packs, thus preventing mutual interference in the event of thermal runaway of different battery packs. In use, a cover (not shown in the figure) is connected to the housing 1.

[0034] The battery device of this invention improves the utilization rate of the placement cavity of the housing 1, saves space, and increases the energy density of the battery device by suspending the bottom of the battery 2 near the base plate 101 above the mounting part 302. The upper surface of the mounting part 302 of the structural beam 3 is spaced a first distance D from the bottom of the battery 2, thereby preventing the weld marks or the top of the connectors on the mounting part 302 from colliding with the bottom of the battery 2 near the base plate 101 when the battery 2 is subjected to bumps during use. This avoids the impact of the mounting part 302 on the battery 2 and improves the battery's safety performance.

[0035] Specifically, the first distance D ranges from 3mm to 5mm. The first distance D can be any value among 3mm, 4mm, and 5mm, or a value between any two of these. The first distance D is the interval between the upper surface of the mounting portion 302 of the structural beam 3 and the bottom of the battery 2. If this distance is too large, it will reduce the utilization rate of the placement cavity of the housing 1, the structural setup will not be compact enough, and it will reduce the energy density of the battery device. If this distance is too small, the safety of the battery 2 near the bottom of the base plate 101 cannot be guaranteed. When the base plate 101 is impacted, the weld marks on the mounting portion 302 or the top of the connectors may easily come into contact with the battery 2, causing damage to the battery 2.

[0036] In one embodiment, the base plate 101 includes a first surface 1011 and a second surface 1012, such as Figure 7 As shown, the height of the first surface 1011 is higher than the height of the second surface 1012. The battery 2 is connected to the first surface 1011, and the mounting part 302 is connected to the second surface. The distance between the battery 2 and the structural beam 3 is less than the distance W between the isolation part 301 and the first surface 1011, so that the part of the battery 2 near the structural beam 3 is suspended above the top of the mounting part 302. To facilitate the installation of the structural beam 3, the width of the second surface 1012 is greater than the sum of the width of the mounting part 302 and the thickness of the isolation part 301. The heights of the first surface 1011 and the second surface 1012 are set along the direction perpendicular to the base plate 101.

[0037] In one embodiment, the battery 2 is directly mounted on the first surface 1011. The height difference between the first surface 1011 and the second surface 1012 is a second distance, ranging from 4.5mm to 8mm. The thickness of the mounting portion 302 ranges from 1.5mm to 3mm. The second distance can be any value among 4.5mm, 6mm, 8mm, etc., or a value between any two values. The thickness of the mounting portion 302 can be any value among 1.5mm, 2.2mm, 3mm, etc., or a value between any two values. The thickness of the mounting portion 302 is a dimension perpendicular to the base plate 101. By controlling the height difference between the first surface 1011 and the second surface 1012 and the thickness of the mounting portion 302, the first distance D between the upper surface of the mounting portion 302 and the bottom of the battery 2 is controlled.

[0038] In another embodiment, a support layer is provided on the first surface 1011, and the battery 2 is connected to the support layer. Specifically, the support layer is a structural adhesive layer, and the battery 2 is connected to the structural adhesive layer.

[0039] Understandably, the length of the portion of battery 2 protruding from the first surface 1011 is greater than or equal to 0.1 and less than or equal to 0.25 of the total length of battery. When the length of the portion of battery 2 protruding from the first surface 1011 is less than 0.1 of the total length of battery, the bottom of battery 2 is easily damaged when it is bumped during use. When the length of the portion of battery 2 protruding from the first surface 1011 is greater than 0.25 of the total length of battery, it affects the connection strength between battery 2 and base plate 101.

[0040] To facilitate welding of structural beam 3 to base plate 101, structural beam 3 and base plate 101 are made of the same material, specifically, both structural beam 3 and base plate 101 are made of steel.

[0041] In one specific embodiment, the structural beam 3 includes two spliced ​​sub-beams, each sub-beam including a connecting plate 3021 and a back plate 3011, the back plates 3011 of the two sub-beams contacting each other, as shown below. Figures 7 to 9 As shown, the connecting plate 3021 and the back plate 3011 are bent at 90°, meaning the sub-beam is an L-shaped plate. The connecting plate 3021 is configured as a mounting part 302 for connection with the bottom plate 101, i.e., the connecting plate 3021 is a mounting part 302, and the back plate 3011 is configured as an isolation part 301, i.e., the back plate 3011 is an isolation part 301, and the back plate 3011 is perpendicular to the bottom plate 101. To improve the connection reliability of the structural beam 3, an end auxiliary plate 303 is provided at the end of the back plate 3011, and the end auxiliary plate 303 is connected to the side plate of the box body 1.

[0042] Furthermore, the two back plates 3011 are connected together, thereby improving the structural reliability of the back plates 3011. Two connecting plates 3021 are respectively disposed on both sides of the isolation portion 301 formed by the two back plates 3011, thus facilitating the connection between the connecting plates 3021 and the base plate 101. Specifically, the two back plates 3011 are riveted, glued, or welded together; other connection methods commonly used in the art can also be used, and are not limited here. Figure 7 As shown, the two back plates 3011 are riveted together. Similarly, the connection between the connecting plate 3021 and the base plate 101 can also be riveted, glued, or welded, or other connection methods commonly used in the art can be used, which are not limited here. Figure 7 As shown, the connecting plate 3021 and the base plate 101 are riveted together. Since the sub-beam is formed by bending the connecting plate 3021 and the back plate 3011, a cavity 304 is formed between the bending positions of the two sub-beams that are close to each other. When the two back plates 3011 are bonded with structural adhesive, the cavity 304 is filled with structural adhesive to improve the reliability of the bonding.

[0043] In another specific embodiment, the structural beam 3 includes a vertical beam 3012 and a horizontal beam 3022 welded together, such as... Figure 10 As shown, the crossbeam 3022 is used to connect with the base plate 101 and serves as the mounting part 302, while the vertical beam 3012 serves as the isolation part 301. To facilitate welding while ensuring structural strength, both the vertical beam 3012 and the crossbeam 3022 are made of steel plates.

[0044] In the third embodiment, the mounting part 302 and the isolation part 301 are an integral structure, such as... Figure 11 As shown. In this embodiment, the mounting part 302 and the isolation part 301 can be extruded.

[0045] To improve the impact resistance of the bottom of the battery device, a bottom protective plate 102 is provided on the outer side of the bottom plate 101. The bottom protective plate 102 covers the outer surface of the bottom plate 101, and there is a partial cavity structure between the two, which further improves the safety of the bottom of the battery device. The outer surface of the bottom plate 101 refers to the surface of the bottom plate 101 away from the surface where the battery 2 is placed.

[0046] The battery device of this utility model sets the base plate 101 into a first surface 1011 and a second surface 1012 with different heights. The first surface 1011 is higher than the second surface 1012. The battery 2 is set on the first surface 1011, and the mounting part 302 of the structural beam 3 is set on the second surface 1012. The bottom of the battery 2 near the base plate 101 is suspended from the top of the mounting part 302, so that the battery 2 and the mounting part 302 are spatially arranged, which improves the utilization rate of the placement cavity of the housing 1, saves space, avoids the direct collision and damage of the welding marks on the mounting part 302 or the top of the connector to the battery 2 during use, avoids the impact of the mounting part 302 on the battery 2, and improves the safety performance of the battery.

[0047] This utility model also provides a vehicle, including a battery device, which is the battery device described above. Therefore, the vehicle has the advantages of the battery device described above, which will not be repeated here.

[0048] In the description of this solution, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery device comprising a case and a battery provided in the case, the case comprising a bottom plate on which a structural beam and a plurality of the battery are provided, characterized by, The structural beam is a T-shaped beam, which includes a mounting part and an isolation part. The mounting part is located on both sides of the isolation part and is connected to the base plate. The bottom of the battery is suspended from the top of the mounting part, and the upper surface of the mounting part is spaced apart from the bottom of the battery by a first distance D.

2. The battery device of claim 1, wherein The first distance D is in the range of 3mm-5mm.

3. The battery device according to claim 1 or 2, characterized by, The base plate includes a first surface and a second surface, the height of the first surface is higher than the height of the second surface, the battery is connected to the first surface, the mounting part is connected to the second surface, and the distance between the battery and the structural beam is less than the distance between the isolation part and the first surface.

4. The battery device of claim 3, wherein The battery is directly mounted on the first surface, the height difference between the first surface and the second surface is the second distance, the second distance ranges from 4.5mm to 8mm, and the thickness of the mounting part ranges from 1.5mm to 3mm.

5. The battery device of claim 3, wherein A support layer is provided on the first surface, and the battery is connected to the support layer.

6. The battery device of claim 1, wherein The structural beams are made of the same material as the base plate.

7. The battery device of claim 1, wherein The structural beam includes two spliced ​​sub-beams, each sub-beam including a connecting plate and a back plate, with the back plates of the two sub-beams in contact; the connecting plate and the back plate are bent at 90°, the connecting plate is configured as a mounting part for connection with the base plate, the back plate is configured as the isolation part, and the back plate is perpendicular to the base plate.

8. The battery device of claim 7, wherein, The two back plates are connected together, and the two connecting plates are respectively located on both sides of the isolation section.

9. The battery device of claim 8, wherein, The two back plates are riveted, bonded, or welded together.

10. The battery device of claim 1, wherein, The structural beam includes vertical beams and horizontal beams welded together. The horizontal beams are the mounting parts and are connected to the base plate. The vertical beams are the isolation parts.

11. The battery device of claim 1, wherein The mounting section and the isolation section are an integral structure.

12. A vehicle comprising a battery arrangement, characterized by The battery device is the battery device according to any one of claims 1-11.

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