Module supporting plate, lower box body and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a module supporting plate, a lower box body and a battery pack. The module supporting plate comprises a bottom protection plate and a reinforcing plate. The bottom protection plate comprises a first surface for supporting the battery cell module and a second surface deviating from the first surface; the reinforcing plate is arranged on the second surface of the bottom protection plate and fixedly connected with the bottom protection plate, and the reinforcing plate comprises at least one bent structure. According to the module supporting plate provided by the utility model, the reinforcing plate is arranged on the bottom protection plate, and the reinforcing plate comprises at least one bending structure, so that the rigidity and the strength of the module supporting plate can be effectively improved, and further a more obvious supporting effect is provided for a module. And meanwhile, it can be guaranteed that the overall rigidity and strength of the module supporting plate are improved, the thickness of the module supporting plate is reduced, light weight of the battery pack is facilitated, and the energy density of the battery pack is improved. And moreover, the occupation of the internal space of the battery pack is reduced, so that popularization and application to multiple battery pack structures are facilitated, and the universality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to module support plate, lower box and battery pack. BACKGROUND

[0002] Power battery. Also called battery pack, as the most core spare part and power source in new energy automobile, battery pack is not only heavy, and the structure is relatively complex. The battery pack is composed of a plurality of battery cell modules, and each battery cell module is composed of a plurality of battery cells.

[0003] Among them, the battery cell module is supported by the lower box, and the module support plate in the lower box is an important component part, and the structural strength determines the safety performance of the internal module of the battery pack. The common roll-pressed steel module support plate has poor rigidity, and it is difficult to meet the demand of the future new energy automobile on the structural strength of the battery pack. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of module support plate, lower box and battery pack to solve the problem of common roll-pressed steel module support plate poor rigidity, low structural strength.

[0005] Firstly, the utility model provides a kind of module support plate, including bottom guard plate and reinforcing plate. Bottom guard plate includes the first surface for supporting battery cell module and the second surface away from the first surface;Reinforcing plate is located at the second surface of bottom guard plate, and is fixedly connected with bottom guard plate, and reinforcing plate includes at least one bending structure.

[0006] Beneficial effects: the module support plate provided by the utility model can effectively improve the rigidity and strength of the module support plate by setting reinforcing plate on bottom guard plate, and reinforcing plate includes at least one bending structure, thereby providing more obvious support for module. At the same time, by setting reinforcing plate with bending structure, the rigidity and strength of the whole module support plate can be improved while the thickness of the module support plate is reduced, which is beneficial to the lightweight of battery pack and the improvement of energy density of battery pack. In addition, the occupation of internal space of battery pack is reduced, which is beneficial to the popularization and application of multi-cumulative battery pack structure and the improvement of universality.

[0007] In an alternative embodiment, the bottom guard plate includes a plate body and a flange provided on both sides of the plate body in the width direction, and the flange is provided on the second surface of the plate body.

[0008] In an alternative embodiment, the width of the plate body is L1, and 150mm≤L1≤180mm.

[0009] In an alternative embodiment, the bending structure comprises at least one first bending portion and at least one second bending portion, the first bending portion and the second bending portion both extend along the length direction of the bottom guard plate, and the first bending portion and the second bending portion are at least partially arranged in different planes.

[0010] In an alternative embodiment, the maximum distance between the second bending portion and the first surface of the bottom guard plate is L2, the height of the flange protruding from the first surface of the plate body is H, and 8mm≤L2≤H.

[0011] In an alternative embodiment, the width of the reinforcing plate is L4, and 1 / 2≤L4 / L1≤2 / 3.

[0012] In an alternative embodiment, the reinforcing plate is welded to the bottom guard plate at the first bending portion, the width of the first bending portion is L3, and L3≥10mm.

[0013] In a second aspect, the utility model also provides a lower box body, comprising a frame and the module support plate in the above technical scheme, the module support plate is arranged at the bottom of the frame, and the first surface of the bottom guard plate of the module support plate is connected with the frame.

[0014] Beneficial effects: because the lower box body comprises the module support plate, the same effect as the module support plate is achieved, and details are not repeated here.

[0015] In an alternative embodiment, the frame and the bottom guard plate form a containing cavity, the containing cavity comprises an electrical assembly area and a module assembly area, and the long side of the bottom guard plate is arranged along the length direction of the module assembly area.

[0016] In a third aspect, the utility model also provides a battery pack, comprising a cell module, an upper box body and the lower box body in the above technical scheme, the lower box body and the upper box body are connected, and the cell module is protected between the upper box body and the lower box body.

[0017] Beneficial effects: because the battery pack comprises the lower box body, the same effect as the lower box body is achieved, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0019] Figure 1 It is a structure schematic view of a module support plate in the utility model embodiment in the first visual angle.

[0020] Figure 2 As shown in the structural schematic view of the module support plate in the second perspective view; Figure 1 As shown in the structural schematic view of the module support plate in the second perspective view;

[0021] Figure 3 As shown in the structural schematic view of the module support plate in the second perspective view; Figure 1 As shown in the structural schematic view of the module support plate in the second perspective view;

[0022] Figure 4 As shown in the structural schematic view of the module support plate in the second perspective view;

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, module support plate; 11, bottom guard plate; 111, plate body; 112, flange; 113, first surface; 114, second surface; 12, reinforcing plate; 121, first bending part; 122, second bending part; 2, frame; 3, battery module; 10, lower box. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] The module support plate in the related art has the problems of poor rigidity, difficulty in meeting the demand of the battery pack structure strength of future new energy vehicles, large weight of the roll-pressed steel, and large process processing difficulty. The module support plate is made by several times of bending and welding of a sheet metal part, and many reinforcing structure features are difficult to be bent and formed. Meanwhile, the thickness of the module support plate is large, which occupies more internal space of the battery pack, increases the design difficulty of the whole pack structure, and a module support plate is often difficult to be popularized to multiple battery pack structure designs. Therefore, the future battery pack support plate structure design needs to consider the strength of the structure, the difficulty of process manufacturing, lightweight, and structure availability, and the like. Therefore, the present application provides a module support plate, a lower box and a battery pack.

[0027] The embodiments of the present application will be described below in combination with Figures 1 to 4

[0028] ​According to the embodiment of the utility model, first, a module support plate 1 is provided, which comprises a bottom guard plate 11 and a reinforcing plate 12. The bottom guard plate 11 comprises a first surface 113 for supporting the battery cell module 3 and a second surface 114 opposite to the first surface 113; the reinforcing plate 12 is arranged on the second surface 114 of the bottom guard plate 11 and is fixedly connected with the bottom guard plate 11, and the reinforcing plate 12 comprises at least one bending structure.

[0029] The module support plate 1 provided by the utility model has the reinforcing plate 12 arranged on the bottom guard plate 11, and the reinforcing plate 12 comprises at least one bending structure, so that the rigidity and strength of the module support plate 1 can be effectively improved, thereby providing better support for the module. Meanwhile, by arranging the reinforcing plate 12 with the bending structure, the rigidity and strength of the module support plate 1 as a whole can be improved while the thickness of the module support plate 1 is reduced, which is beneficial to the lightweight of the battery pack and the improvement of the energy density of the battery pack. In addition, the occupation of the internal space of the battery pack is reduced, thereby facilitating the popularization and application to various battery pack structures and improving the versatility.

[0030] In some embodiments, the bottom guard plate 11 comprises a plate body 111 and a flange 112 arranged on both sides of the plate body 111 in the width direction, and the flange 112 is arranged on the second surface 114 of the plate body 111.

[0031] Specifically, the plate body 111 is used for supporting the battery cell module 3, and the flanges 112 arranged on both sides of the plate body 111 in the width direction can further enhance the overall stability and durability of the module support plate 1, so that it can better resist fatigue damage during long-term use and prolong the product life.

[0032] In some embodiments, the width of the plate body 111 is L1, and 150mm≤L1≤180mm.

[0033] The width L1 of the plate body 111 is controlled to be between 150mm and 180mm, so as not to be too long to affect the overall rigidity and strength of the module support plate 1, while reducing the material and the overall weight; and not too short to ensure effective support for the module. Therefore, within this length range, the bottom guard plate 11 can provide sufficient rigidity and bending resistance to ensure stable structural performance under various working conditions.

[0034] Controlling the width L1 of the plate body 111 to be between 150mm and 180mm makes the entire battery pack more compact when the module support plate 1 provided by the utility model is applied to the battery pack, which is helpful to optimize the space utilization of the battery pack. Especially for highly integrated and miniaturized devices such as electric vehicles and energy storage systems, the advantages are more obvious.

[0035] The width L1 of the plate body 111 is controlled in the range of 150mm≤L1≤180mm, so that the support plate can better adapt to different specifications of the battery cell module 3. By selecting an appropriate length, the structural strength can be ensured while better matching other components such as the shell, connector, etc., improving the compatibility and integration of the entire system, meeting the needs of different application scenarios, thereby improving the versatility of the module support plate 1.

[0036] In addition, the bottom guard plate 11 within the length range is more convenient to process and assemble during production, reducing the difficulty of process forming. This not only improves production efficiency, but also reduces manufacturing cost.

[0037] In some embodiments, the bending structure includes at least one first bending portion 121 and at least one second bending portion 122, both of which extend along the length direction of the bottom guard plate 11, and the first bending portion 121 and the second bending portion 122 are at least partially arranged in different planes.

[0038] By setting at least one first bending portion 121 and at least one second bending portion 122, the rigidity and bending resistance of the reinforcing plate 12 are increased. The first bending portion 121 and the second bending portion 122 can more effectively disperse external forces and reduce local stress concentration, thereby improving the strength of the overall structure.

[0039] The first bending portion 121 and the second bending portion 122 are at least partially arranged in different planes, so that the entire support plate can better maintain stability when subjected to external impact or vibration, reducing the possibility of deformation and displacement. When the battery pack is applied to a new energy vehicle, the reinforcing plate 12 can resist the impact of foreign objects such as stones on the road on the battery pack, play a role in energy absorption and release, and can protect the battery pack from damage due to external forces, thereby avoiding safety problems of the battery pack.

[0040] Specifically, the first bending portion 121 and / or the second bending portion 122 has a trapezoidal, rectangular or arc-shaped cross-sectional shape perpendicular to the length direction of the bottom guard plate 11.

[0041] In some embodiments, the bending structure includes a plurality of first bending portions 121 and a plurality of second bending portions 122, and the first bending portions 121 and the second bending portions 122 are staggered. Along the width direction of the bottom guard plate 11, the reinforcing plate 12 has a wave-shaped structure, further enhancing the structural strength of the module support plate 1.

[0042] In some embodiments, the maximum distance between the second bending portion 122 and the first surface 113 of the bottom guard plate 11 is L2, the height of the flange 112 protruding from the first surface 113 of the plate body 111 is H, and 8mm≤L2≤H.

[0043] The maximum distance between the second bending part 122 and the first surface 113 of the bottom protection plate 11 is at least 8 mm, so that the rigidity and bending resistance of the overall support plate can be ensured, and the test results of the bottom ball impact work condition simulation under foreign object impact are significantly optimized. Since the second surface 114 of the bottom protection plate 11 is provided with the flange 112, and the maximum distance between the second bending part 122 and the first surface 113 of the bottom protection plate 11 is not greater than the height H of the flange 112 protruding from the first surface 113 of the plate body 111, so that the reinforcing plate 12 does not additionally increase the occupied space of the battery pack, which is beneficial to improve the energy density of the battery pack.

[0044] In some embodiments, the width of the reinforcing plate 12 is L4, and 1 / 2≤L4 / L1≤2 / 3.

[0045] Controlling the ratio of the width of the reinforcing plate 12 to the width of the bottom protection plate 11 within the range of 1 / 2 to 2 / 3 can ensure effective combination with the bottom protection plate 11 while maintaining sufficient support area. This ratio can provide sufficient rigidity, avoid excessive weight increase, and not overly occupy internal space.

[0046] By reasonably controlling the width of the reinforcing plate 12, the bending resistance of the entire support plate can be effectively improved. The reinforcing plate 12 with moderate width can better resist transverse and longitudinal bending forces, improving the possibility of deformation resistance. At the same time, the stability and durability of the entire support plate can be significantly improved, ensuring good structural integrity under various working conditions.

[0047] In some embodiments, the reinforcing plate 12 is welded to the bottom protection plate 11 at the first bending part 121, and the width of the first bending part 121 is L3, and L3≥10mm.

[0048] The width L3 of the first bending part 121 is at least 10 mm, which makes the welding process simpler, maximizes the structural strength of the support plate while reducing weight increase and improving process feasibility.

[0049] According to the embodiments of the present application, the second aspect further provides a lower box body 10, which comprises a frame 2 and the module support plate 1 in the above embodiments, and the module support plate 1 is arranged at the bottom of the frame 2, and the first surface 113 of the bottom protection plate 11 of the module support plate 1 is connected with the frame 2.

[0050] The module support plate 1 provided by the present application can adopt a structure with better rigidity formed by roll-pressing and bending steel. The reinforcing plate 12 formed by bending can effectively improve the rigidity and strength of the support plate, thereby providing more obvious support for the module, which is beneficial to structure optimization and weight reduction, leaving more space for weight reduction and cost reduction of the battery pack.

[0051] Because the lower box 10 comprises the module support plate 1, has the same effect with the module support plate 1, and will not be repeated here.

[0052] In some embodiments, the frame 2 and the bottom guard plate 11 constitute a containing cavity, the containing cavity comprises an electrical assembly area and a module assembly area, and the long side of the bottom guard plate 11 is arranged along the length direction of the module assembly area.

[0053] In the embodiment, the module assembly area is provided with 2x2, that is, four subareas, and one battery cell module 3 is placed in each subarea respectively. The length of the module support plate 1 is adapted to the length of each subarea. A plurality of module support plates 1 are spliced in each subarea, and the adjacent module support plates 1 are spliced with the long side. In this way, the module support plate 1 can effectively support the battery cell module 3, and the assembly between the module support plate 1 and other components (such as the cross beam) of the lower box 10 is facilitated, and the production efficiency of the battery pack is improved.

[0054] According to the embodiments of the utility model, the third aspect further provides a battery pack comprising a battery cell module 3, an upper box and the lower box 10 of the above embodiments, the lower box 10 and the upper box are connected, and the battery cell module 3 is protected between the upper box and the lower box 10.

[0055] Because the battery pack comprises the lower box 10, has the same effect with the lower box 10, and will not be repeated here.

[0056] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A module support plate, characterized by, include: A bottom protective plate, the bottom protective plate including a first surface for supporting the battery cell module and a second surface facing away from the first surface; A reinforcing plate is disposed on the second surface of the bottom protective plate and fixedly connected to the bottom protective plate. The reinforcing plate includes at least one bending structure.

2. The module support plate of claim 1, wherein, The bottom guard plate includes a plate body and flanges disposed on both sides of the plate body in the width direction, the flanges being disposed on the second surface of the plate body.

3. The module support plate of claim 2, wherein, The width of the plate body is L1, where 150mm ≤ L1 ≤ 180mm.

4. The module support plate according to claim 2 or 3, characterized in that The bending structure includes at least one first bending portion and at least one second bending portion, both of which extend along the length direction of the bottom protective plate, and the first bending portion and the second bending portion are at least partially arranged on opposite sides.

5. The module support plate of claim 4, wherein, The maximum distance between the second bend and the first surface of the bottom guard plate is L2, and the height of the flange protruding from the first surface of the plate body is H, where 8mm≤L2≤H.

6. The mold support plate according to any one of claims 1 to 3, characterized by The width of the reinforcing plate is L4, and 1 / 2 ≤ L4 / L1 ≤ 2 / 3.

7. The module support plate of claim 4, wherein, The reinforcing plate is welded to the bottom protective plate at the first bend, and the width of the first bend is L3, where L3 ≥ 10 mm.

8. A lower housing characterized by, include: frame; The module support plate according to any one of claims 1 to 7, wherein the module support plate is disposed at the bottom of the frame, and the first surface of the bottom guard plate of the module support plate is connected to the frame.

9. The drop box of claim 8, wherein, The frame and the bottom cover form a receiving cavity, which includes an electrical assembly area and a module assembly area. The long side of the bottom cover is arranged along the length direction of the module assembly area.

10. A battery pack, characterized by, include: Battery cell module; upper box; The lower housing as described in claim 8 or 9, wherein the lower housing is connected to the upper housing, and the battery cell module is protected between the upper housing and the lower housing.

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