Battery pack bottom guard plate, battery pack box, battery pack and vehicle

Abstract

The present disclosure relates to the technical field of battery packs and discloses a battery pack bottom guard plate, a battery pack box, a battery pack and a vehicle. The battery pack bottom guard plate includes a top plate, a bottom plate and a plurality of ribs. The top plate and the bottom plate are arranged at intervals. The top plate is used to support the battery cells of the battery pack. The plurality of ribs are arranged at intervals between the top plate and the bottom plate. The two ends of the ribs are connected to the top plate and the bottom plate respectively. At least a portion of the ribs are inclined relative to the bottom plate. The battery pack bottom guard plate of the present disclosure embodiment has the advantages of good protection effect on the battery cells.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack bottom guard plate, a battery pack box, a battery pack and a vehicle. Background Art

[0002] The battery pack is usually installed at the bottom of the vehicle body and directly exposed in the chassis area. In order to prevent the battery cells in the battery pack from being damaged due to the bottoming out of the vehicle while driving, a bottom guard plate is provided at the bottom of the battery pack to improve the safety protection capability of the battery cells.

[0003] In the related art, the bottom guard plate of the battery pack is designed to be lightweight. The bottom guard plate includes a top plate and a bottom plate arranged at intervals, and a plurality of vertical ribs arranged at intervals are provided between the top plate and the bottom plate to provide support. However, when the bottom guard plate of the battery pack is subjected to the bottom support force of the vehicle, the protection effect of the battery cell is poor. Utility Model Content

[0004] The present disclosure aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the embodiments of the present disclosure provide a battery pack bottom guard plate with good protection effect on battery cells, the embodiments of the present disclosure provide a battery pack box with good protection effect on battery cells, the embodiments of the present disclosure provide a battery pack with good protection effect on battery cells, and the embodiments of the present disclosure provide a vehicle with good protection effect on battery cells.

[0005] The battery pack bottom protective plate of the disclosed embodiment includes a top plate, a bottom plate and a plurality of ribs, wherein the top plate and the bottom plate are spaced apart, and the top plate is used to support the battery cells of the battery pack; a plurality of the ribs are spaced apart and arranged between the top plate and the bottom plate, and the two ends of the ribs are respectively connected to the top plate and the bottom plate, and at least a portion of the ribs are inclined relative to the bottom plate.

[0006] In some embodiments, the plurality of ribs are arranged obliquely and the inclination angle of the ribs is 15°-75°.

[0007] In some embodiments, the ribs extend along the width direction of the bottom guard plate, and the plurality of ribs are divided into a plurality of groups, and the plurality of groups of ribs are arranged at intervals along the length direction of the bottom guard plate.

[0008] In some embodiments, each group of the ribs includes two ribs, and the two ribs gradually move away from each other in a direction from the bottom plate to the top plate.

[0009] In some embodiments, the top plate has a first supporting portion for supporting the battery pack cell, the multiple groups of ribs include multiple first rib groups, the multiple first rib groups are arranged corresponding to the first supporting portion, the spacing between two ribs in the first rib group is D1, and the width of the battery pack cell is D2, wherein 0.2D2≤D1≤D2.

[0010] In some embodiments, the top plate also has a second supporting portion for supporting the electrical components of the battery pack, and the multiple groups of ribs include multiple second rib groups, and the multiple second rib groups are arranged corresponding to the second supporting portion. The distance between two ribs in the second rib group is D3, where D3>D2.

[0011] In some embodiments, the thickness of the bottom guard plate is H1, where 5mm≤H1≤20mm.

[0012] In some embodiments, the edge of the bottom guard plate has a connection hole for connecting to the frame of the battery pack body, and the distance between the connection hole and the edge of the bottom guard plate is greater than 3 mm.

[0013] The battery pack case of the disclosed embodiment includes a frame, a cooling plate and a bottom protective plate, wherein the cooling plate is connected to the frame, the bottom protective plate is the battery pack bottom protective plate described in any of the above embodiments, the bottom protective plate is connected to the frame, and the bottom protective plate is arranged on a side of the cooling plate away from the frame in the thickness direction thereof.

[0014] In some embodiments, the thickness of the cooling plate is H2, where 1mm≤H2≤50mm.

[0015] The battery pack of the disclosed embodiment includes a battery cell and a battery pack case. The battery pack case is the battery pack case described in any of the above embodiments, and the battery cell is disposed in the battery pack case.

[0016] The vehicle of the disclosed embodiment includes the battery pack described in any of the above embodiments.

[0017] During use of the battery pack bottom guard plate of the disclosed embodiment, when the vehicle bottoms out and hits the battery pack bottom guard plate, the bottom plate is subjected to a bottom force that is transmitted to the top plate through the ribs. The inclined ribs can decompose the bottom force borne by the bottom plate into two forces, one vertically upward and one at a certain angle to the top plate, and transmit them to the top plate. The vertically upward force component is transmitted to the bottom wall of the battery cell shell, and the force component at a certain angle to the top plate is transmitted to the side wall of the battery cell shell. Since the side wall of the battery cell shell is a large surface with a strong bearing capacity, the deformation of the battery cell after being subjected to force can be reduced, and the risk of internal short circuit of the battery cell due to excessive intrusion of the battery cell monomer can be reduced.

[0018] Therefore, the battery pack bottom guard plate of the embodiment of the present disclosure has the advantages of good protection effect on the battery cells, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural schematic diagram of a battery pack according to an embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the arrangement of the battery cells and electrical components of the battery pack according to an embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of the installation of the battery cells of the battery pack according to the embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of the structure of the battery cell of the battery pack according to an embodiment of the utility model.

[0023] Figure 5 It is a partial structural schematic diagram of the bottom guard plate of an embodiment of the utility model.

[0024] Reference numerals:

[0025] Bottom guard plate 100; battery cell 200; frame 300; electrical component 400;

[0026] Top plate 1; first support portion 101; second support portion 102;

[0027] Bottom plate 2;

[0028] Tendon 3;

[0029] The first rib group 4;

[0030] The second rib group 5;

[0031] Connection hole 6. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0033] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 5 As shown, the battery pack bottom guard plate 100 of the embodiment of the utility model includes a top plate 1, a bottom plate 2 and a plurality of ribs 3. The top plate 1 and the bottom plate 2 are arranged at intervals, the top plate 1 is used to support the battery cells 200 of the battery pack, and the plurality of ribs 3 are arranged at intervals between the top plate 1 and the bottom plate 2, and the two ends of the ribs 3 are respectively connected to the top plate 1 and the bottom plate 2, and at least a part of the ribs 3 is arranged obliquely relative to the bottom plate 2, which can be understood as a part of the ribs 3 being arranged obliquely or all of the ribs 3 being arranged obliquely.

[0035] During the use of the battery pack bottom guard plate 100 of the embodiment of the utility model, when the vehicle bottoms out and hits the battery pack bottom guard plate 100, the bottom plate 2 is subjected to the bottom force and then transmitted to the top plate 1 through the ribs 3. The inclined ribs 3 can decompose the bottom force borne by the bottom plate 2 into two forces, one vertically upward and one at a certain angle to the top plate 1, and transmit them to the top plate 1. The vertically upward force component is transmitted to the shell bottom wall of the battery cell 200, and the force component at a certain angle to the top plate 1 is transmitted to the shell side wall of the battery cell 200. Since the shell side wall of the battery cell 200 is a large surface with a strong bearing capacity, the deformation of the battery cell 200 after being subjected to force can be reduced, and the risk of internal short circuit of the battery cell 200 due to excessive intrusion of the battery cell 200 monomer can be reduced.

[0036] Therefore, the battery pack bottom guard plate 100 of the embodiment of the utility model has the advantages of good protection effect on the battery cell 200 and the like.

[0037] In some embodiments, the plurality of ribs 3 are all inclined and the inclination angle of the ribs 3 is 15°-75°. Figure 2 and Figure 3 As shown, each rib 3 is tilted and the tilt angle of the rib 3 is 60°. After testing the bottom guard plate 100 for its ability to resist bottom ball impact, the bottom guard plate 100 of the battery pack of the present invention can improve its ability to resist bottom ball impact by 20% while maintaining the same thickness as the bottom guard plate of the battery pack in the related art.

[0038] In some embodiments, the ribs 3 extend along the width direction of the bottom guard plate 100 , and the plurality of ribs 3 are divided into a plurality of groups, and the plurality of groups of ribs 3 are arranged at intervals along the length direction of the bottom guard plate 100 .

[0039] like Figure 1 and Figure 3 As shown, when the battery cell 200 of the battery pack is assembled, the length direction of the battery cell 200 is arranged parallel to the width direction of the battery pack, and the large surface of the battery cell 200 is divided into two large surfaces in the length direction and two large surfaces in the width direction, and the area of ​​the two large surfaces in the length direction is larger than the area of ​​the two large surfaces in the width direction. By extending the ribs 3 along the width direction of the bottom guard plate 100, the ribs 3 correspond to the large surface in the length direction of the battery cell 200, so as to further reduce the deformation of the battery cell 200, reduce the risk of internal short circuit of the battery cell 200 due to too much intrusion into the single cell of the battery cell 200, and further enhance the protective effect of the bottom guard plate 100 of the battery pack of the utility model embodiment.

[0040] In some embodiments, each group of ribs 3 includes two ribs 3 , and the two ribs 3 gradually move away from each other in a direction from the bottom plate 2 to the top plate 1 .

[0041] like Figure 2 and Figure 3As shown, the two ribs 3 in each group of ribs 3 are arranged in an inverted "eight" shape. During the assembly process, each battery cell 200 can correspond to a group of ribs 3, and the two ribs 3 in each group of ribs 3 respectively correspond to the large surfaces of the battery cell 200 in two length directions, thereby further reducing the deformation of the battery cell 200 and the risk of internal short circuit of the battery cell 200 due to excessive intrusion into the battery cell 200, thereby further enhancing the protective effect of the battery pack bottom guard plate 100 of the embodiment of the utility model.

[0042] In some embodiments, the top plate 1 has a first support portion 101 for supporting the battery pack cell 200, the multiple groups of ribs 3 include multiple first rib groups 4, the multiple first rib groups 4 are arranged corresponding to the first support portion 101, the spacing between two ribs 3 in the first rib group 4 is D1, and the width of the battery pack cell 200 is D2, where 0.2D2≤D1≤D2.

[0043] like Figure 2 and Figure 3 As shown, since the bottom guard plate 100 is mainly used to protect the battery cells 200 of the battery pack, the two ribs 3 in the first rib group 4 corresponding to the first support portion 101 are reasonably arranged so that the distance between the two ribs 3 in the first rib group 4 can match the thickness of the battery cell 200, preventing the distance between the two ribs 3 in the first rib group 4 from being too large or too small to match the large surface of the battery cell 200 in the length direction.

[0044] In some embodiments, the top plate 1 also has a second supporting portion 102 for supporting the battery pack electrical components 400, and the multiple groups of ribs 3 include multiple second rib groups 5, and the multiple second rib groups 5 are arranged corresponding to the second supporting portion 102, and the distance between two ribs 3 in the second rib group 5 is D3, where D3>D2.

[0045] For example, Figure 2 As shown, it can be understood that the electrical components 400 of the battery pack include a high-voltage electrical box and a controller, and the battery pack does not have battery cells 200 arranged where the high-voltage electrical box and the controller are arranged. Even if the second support portion 102 is severely deformed by the bottom support, there will be no safety hazard. Therefore, the distance between the two ribs 3 in the second rib group 5 corresponding to the second support portion 102 can be appropriately increased to reduce the number of ribs 3 arranged to meet the lightweight design of the bottom guard plate 100.

[0046] Optionally, the thickness of the bottom guard plate 100 is H1, where 5mm≤H1≤20mm. For example, the thickness of the bottom guard plate 100 is 10mm. If the thickness of the bottom guard plate 100 is set too small, the bottom guard plate 100 will lose its protective effect. If the thickness of the bottom guard plate 100 is set too large, it will occupy too much space in the height direction of the battery pack, resulting in a low degree of integration of the battery pack.

[0047] In some embodiments, the edge of the bottom guard plate 100 has a connecting hole 6 for connecting to the frame 300 of the battery pack body. The distance between the connecting hole 6 and the edge of the bottom guard plate 100 is greater than 3 mm. The purpose is to ensure the continuity of the edge of the bottom guard plate 100 and avoid opening the hole too close to the edge or affecting the strength of the bottom guard plate 100 after the edge is cut off.

[0048] The battery pack box of the embodiment of the utility model comprises a frame 300, a cooling plate (not shown in the figure) and a bottom guard plate 100, and the cooling plate is connected to the frame 300. The bottom guard plate 100 is the battery pack bottom guard plate 100 described in any of the above embodiments, the bottom guard plate 100 is connected to the frame 300, and the bottom guard plate 100 is arranged on the side of the cooling plate away from the frame 300 in the thickness direction thereof.

[0049] Therefore, the battery pack case of the embodiment of the utility model has the advantages of protecting the battery cells 200 and the like.

[0050] Optionally, the thickness of the cooling plate is H2, where 1mm≤H2≤50mm.

[0051] For example, the thickness of the cooling plate is 20 mm. If the thickness of the cooling plate is set too small, the cooling plate will lose its protective effect. If the thickness of the cooling plate is set too large, it will occupy too much space in the height direction of the battery pack, making the battery pack less integrated.

[0052] The battery pack of the embodiment of the utility model includes the battery pack box described in any of the above embodiments.

[0053] Therefore, the battery pack of the embodiment of the utility model has the advantages of good protection effect of the battery cells 200 and the like.

[0054] The vehicle of the embodiment of the utility model includes the battery pack described in any of the above embodiments.

[0055] Therefore, the vehicle according to the embodiment of the utility model has the advantages of good protection effect of the battery cell 200 and the like.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery pack bottom guard plate, characterized in that: include: A top plate and a bottom plate, the top plate and the bottom plate are spaced apart, and the top plate is used to support the battery cells of the battery pack; A plurality of ribs, wherein the plurality of ribs are arranged between the top plate and the bottom plate at intervals, two ends of the ribs are connected to the top plate and the bottom plate respectively, and at least a portion of the ribs are arranged obliquely relative to the bottom plate; The multiple ribs are divided into multiple groups, each group of the ribs includes two ribs, the top plate has a first support portion for supporting the battery pack cells, the multiple groups of ribs include multiple first rib groups, the multiple first rib groups are arranged corresponding to the first support portion, the distance between two ribs in the first rib group is D1, the top plate also has a second support portion for supporting the battery pack electrical components, the multiple groups of ribs include multiple second rib groups, the multiple second rib groups are arranged corresponding to the second support portion, the distance between two ribs in the second rib group is D3, wherein D3>D1.

2. The battery pack bottom guard plate according to claim 1, characterized in that: The plurality of ribs are all arranged obliquely and the inclination angle of the ribs is 15°-75°.

3. The battery pack bottom guard plate according to claim 2, characterized in that: The ribs extend along the width direction of the bottom guard plate, and a plurality of groups of the ribs are arranged at intervals along the length direction of the bottom guard plate.

4. The battery pack bottom guard plate according to claim 3, characterized in that: The two ribs gradually move away from each other in a direction from the bottom plate to the top plate.

5. The battery pack bottom guard plate according to claim 4, characterized in that: The width of the battery pack cell is D2, where 0.2D2≤D1≤D2.

6. The battery pack bottom guard plate according to claim 5, characterized in that: Among them, D3>D2.

7. The battery pack bottom guard plate according to claim 1, characterized in that: The thickness of the bottom guard plate is H1, where 5mm≤H1≤20mm.

8. The battery pack bottom guard plate according to claim 1, characterized in that: The edge of the bottom guard plate has a connection hole for connecting to the frame of the battery pack body, and the distance between the connection hole and the edge of the bottom guard plate is greater than 3 mm.

9. A battery pack box, characterized in that: include: frame; A cooling plate connected to the frame; A bottom guard plate, the bottom guard plate of the battery pack according to any one of claims 1 to 8, the bottom guard plate is connected to the frame, and the bottom guard plate is arranged on a side of the cooling plate away from the frame in its thickness direction.

10. The battery pack case according to claim 9, characterized in that: The thickness of the cooling plate is H2, where 1mm≤H2≤50mm.

11. A battery pack, characterized in that: include: Battery cells; and A battery pack case, wherein the battery pack case is the battery pack case according to claim 9 or 10, and the battery cell is arranged in the battery pack case.

12. A vehicle, characterized in that: The vehicle includes the battery pack according to claim 10.

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