Battery bottom protection plate and battery pack

Abstract

The utility model discloses a battery bottom protection plate and a battery pack. The battery bottom protection plate comprises a base plate and a plurality of reinforcing plates, the base plate is provided with a first side face and a second side face opposite to the first side face, a battery module of a battery pack is arranged on the first side face, all the reinforcing plates are arranged on the second side face in a protruding mode, and all the reinforcing plates are distributed at intervals in the first direction. The length of each reinforcing plate extends in the second direction, an included angle is formed between the second direction and the first direction, all the reinforcing plates are bent towards the first direction to form an arc-shaped structure, a buffering cavity is formed between every two adjacent reinforcing plates, and the base plate and the reinforcing plates are both aluminum alloy plates. The battery bottom protection plate is light in weight and good in impact resistance.

Description

Technical Field

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

[0002] The battery pack is installed at the bottom of the car. During driving, the battery pack is often impacted by flying gravel or hit by foreign objects such as stones protruding from the road, which can cause damage to the bottom of the battery pack and affect the normal operation of the battery pack. In severe cases, it may even cause safety hazards. Therefore, a bottom guard plate is usually added to the bottom of the battery pack to provide protection for the battery pack and ensure its safe use.

[0003] Traditional underbody guard plates are made of steel plates. Although steel underbody guard plates have good ability to resist external impact, steel has a high density. The heavy weight of steel underbody guard plates will increase the overall weight of the battery pack, thereby causing the entire vehicle to be heavier and reducing the vehicle's range. Utility Model Content

[0004] One purpose of the utility model is to provide a battery bottom guard plate which is light in weight and has good impact resistance performance.

[0005] Another object of the present invention is to provide a battery pack that is light in weight and has good impact resistance.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, a battery bottom guard plate is provided, comprising a substrate and a plurality of reinforcing plates, wherein the substrate has a first side surface and a second side surface opposite to the first side surface, a battery module of a battery pack is arranged on the first side surface, all the reinforcing plates are protrudingly arranged on the second side surface, all the reinforcing plates are spaced apart along a first direction, and the length of each reinforcing plate extends along a second direction, the second direction is arranged at an angle to the first direction, all the reinforcing plates are bent toward the first direction to form an arc structure, and a buffer chamber is formed between two adjacent reinforcing plates, and the substrate and the reinforcing plates are both aluminum alloy plates.

[0008] As a preferred technical solution for the battery bottom guard plate, two adjacent reinforcing plates, one of which has an end away from the first side surface and the other of which has a side surface in the first direction, have a gap between them to form an opening, and the opening is connected to the buffer chamber.

[0009] As a preferred technical solution for the battery bottom guard plate, the reinforcing plate is an arc structure with a central angle of 90°.

[0010] As a preferred technical solution for the battery bottom guard plate, the arc radius of the reinforcing plate is 10mm-30mm.

[0011] As a preferred technical solution for the battery bottom guard plate, the arc radius of the reinforcing plate is 25 mm.

[0012] As a preferred technical solution of the battery bottom guard plate, an arc segment is provided at the connection portion between the reinforcing plate and the base plate.

[0013] As a preferred technical solution of the battery bottom guard plate, the base plate is threadedly connected to the battery module via a connector.

[0014] As a preferred technical solution of the battery bottom guard plate, a reinforcing rib is protruding from one side of the reinforcing plate toward the buffer chamber, and the reinforcing rib extends along the second direction.

[0015] As a preferred technical solution of the battery bottom guard plate, an elastic buffer layer is provided on the side of the reinforcing plate facing away from the buffer chamber.

[0016] On the other hand, a battery pack is also provided, including a battery module and the battery bottom guard plate described above, the battery module including a box body and a battery group arranged in the box body, the battery bottom guard plate is arranged at the bottom of the box body, and the substrate of the battery bottom guard plate is threadedly connected to the box body through a connecting piece.

[0017] The beneficial effects of the utility model are as follows: unlike the steel battery bottom guard plate in the prior art, the battery bottom guard plate in the utility model is made of aluminum alloy plate, and the density of aluminum alloy is low, which is about 1 / 3 lighter than steel. Therefore, the weight of this battery bottom guard plate is light, which can effectively reduce the overall weight of the battery protection plate. In addition, in this battery bottom guard plate, by protruding a reinforcing plate on the second side of the substrate, the reinforcing plate can effectively enhance the overall structural strength of the battery bottom guard plate. During the driving of the vehicle, if foreign objects such as splashing gravel or foreign objects such as stones protruding from the road surface will first collide with the battery bottom guard plate, the battery bottom guard plate has good structural strength and can resist strong impact force; all reinforcing plates are bent toward the first direction to form an arc structure, and a buffer chamber is formed between two adjacent reinforcing plates. In this way, when the battery bottom guard plate is subjected to a large impact force, the impact force of the foreign object can be buffered by the buffer chamber of the battery bottom guard plate, which can effectively prevent the impact force from being transmitted to the battery module on the battery bottom guard plate, thereby protecting the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below based on the drawings and embodiments.

[0019] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a battery bottom guard plate at one angle according to an embodiment.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the battery bottom guard plate described in one embodiment from another angle.

[0021] Figure 3 This is a three-dimensional structural diagram of the battery bottom guard plate described in another embodiment from another angle.

[0022] Figure 4 This is a three-dimensional structural diagram of the battery bottom guard plate described in yet another embodiment from another angle.

[0023] In the figure:

[0024] 1. Base plate; 11. First side surface; 12. Second side surface; 2. Reinforcement plate; 3. Opening; 4. Buffer chamber; 5. Arc segment; 6. Reinforcement rib; 7. Elastic buffer layer; 8. Connector. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] like Figure 1 and Figure 2 As shown, the utility model provides a battery pack, which is applied to a vehicle. The specific structure of the battery pack is described in detail below by taking the battery pack installed at the bottom of the vehicle as an example.

[0029] The battery pack includes a battery module (not shown in the figure) and a battery bottom guard plate. The battery module includes a box body and a plurality of battery modules arranged inside the box body. The battery bottom guard plate is arranged at the bottom of the box body, and the battery bottom guard plate is threadedly connected to the box body through a connector 8.

[0030] Among them, the battery bottom guard plate includes a substrate 1 and a plurality of reinforcing plates 2, the substrate 1 has a first side 11 and a second side 12 opposite to the first side 11, and a battery module is arranged on the first side 11. In this example, the first side 11 is a flat surface. All reinforcing plates 2 are convexly arranged on the second side 12, all reinforcing plates 2 are spaced along the first direction (i.e., the X direction), and the length of each reinforcing plate 2 extends along the second direction (i.e., the Y direction), and the second direction is arranged at an angle to the first direction. In this example, the second direction is perpendicular to the first direction. All reinforcing plates 2 are bent toward the first direction to form an arc structure, and a buffer chamber 4 is formed between two adjacent reinforcing plates 2, and the substrate 1 and the reinforcing plates 2 are both aluminum alloy plates. Different from the battery bottom guard plate made of steel in the prior art, the battery bottom guard plate in the utility model is made of aluminum alloy plate parts, and the density of aluminum alloy is low, which is about 1 / 3 lighter than steel. Therefore, the weight of this battery bottom guard plate is light, which can effectively reduce the overall weight of the battery protection plate. In addition, in this battery bottom guard plate, a reinforcing plate 2 is protruding from the second side surface 12 of the substrate 1, and the reinforcing plate 2 can effectively enhance the overall structural strength of the battery bottom guard plate. During the driving of the vehicle, if foreign objects such as flying gravel or foreign objects such as stones protruding from the road surface will first collide with the battery bottom guard plate, the battery bottom guard plate has good structural strength and can withstand strong impact forces; all reinforcing plates 2 are bent in the first direction to form an arc structure, and a buffer chamber 4 is formed between two adjacent reinforcing plates 2. In this way, when the battery bottom guard plate is subjected to a large impact force, the impact force of the foreign object can be buffered by the buffer chamber 4 of the battery bottom guard plate, which can effectively prevent the impact force from being transmitted to the battery module on the battery bottom guard plate, thereby protecting the battery module.

[0031] Two adjacent reinforcing plates 2, one end of one reinforcing plate 2 away from the first side surface 11 and a side surface of the other reinforcing plate 2 in the first direction have a gap to form an opening 3, and the opening 3 is connected to the buffer chamber 4. This design allows the two adjacent reinforcing plates 2 to remain relatively independent. When one of the reinforcing plates 2 is impacted by a foreign object, the impact force is blocked to a certain extent from being transmitted to the other reinforcing plate 2 through the opening 3 between the two reinforcing plates 2, which is beneficial to improving the impact resistance of the battery bottom guard plate.

[0032] Furthermore, when the opening 3 between two adjacent reinforcing plates 2 is large in size, the flying gravel will splash into the buffer chamber 4 from the opening 3. During the driving of the vehicle, the gravel inside the buffer chamber 4 hits the reinforcing plate 2 and the base plate 1 to generate a loud noise, and the gravel will also damage the battery bottom guard plate. In this regard, a flexible net (not shown in the figure) can be set at the opening 3, and the flexible nets are respectively connected to the two adjacent reinforcing plates 2. The flexible net can effectively intercept the gravel from entering the buffer chamber 4.

[0033] Preferably, the reinforcing plate 2 is an arc structure with a central angle of 90°. Since the substrate 1 is a component that directly contacts the battery module, if foreign objects such as gravel splashed from the road surface or foreign objects such as stones protruding from the road surface collide with the substrate 1 during the driving of the vehicle, it will produce a large impact force on the battery module. In this example, the reinforcing plate 2 is set to be an arc structure with a central angle of 90°. On the one hand, the reinforcing plate 2 can effectively prevent foreign objects from directly colliding with the substrate 11, so that the battery bottom guard plate provides good protection for the battery pack; on the other hand, it is conducive to saving the manufacturing materials of the reinforcing plate 2, thereby reducing the manufacturing cost of the battery bottom guard plate. Of course, in actual implementation, the size of the central angle of the reinforcing plate 2 can be flexibly set as needed, for example, the size of the central angle of the reinforcing plate 2 is set to 30°, 45°, 60°, 75°, 105°, 120°, etc., and the central angle of the reinforcing plate 2 is not specifically limited here.

[0034] Optionally, the arc radius of the reinforcing plate 2 is 10mm-30mm. It is understandable that the height of the buffer chamber 4 is related to the arc radius of the reinforcing plate 2. The larger the arc radius of the reinforcing plate 2, the better the buffer effect of the buffer chamber 4. However, the larger the arc radius of the reinforcing plate 2, the more materials are required to manufacture the reinforcing plate 2. The arc plate of the reinforcing plate 2 is set to 10mm-30mm, which ensures that the buffer chamber 4 has sufficient buffering effect while saving the manufacturing materials of the battery bottom guard plate as much as possible.

[0035] In this example, the arc radius of the reinforcing plate 2 is 25 mm.

[0036] In other examples, the arc radius of the reinforcing plate 2 may also be 10 mm, 15 mm, 20 mm or 30 mm.

[0037] In this embodiment, the reinforcing plate 2 and the base plate 1 are integrally formed.

[0038] In one example, the battery bottom guard plate is stamped from an aluminum alloy sheet.

[0039] In another example, the battery bottom guard plate is extruded from an aluminum alloy sheet.

[0040] Forming the battery bottom guard plate by stamping or extrusion molding is conducive to ensuring the connection strength between the reinforcing plate 2 and the substrate 1, reducing the possibility of fracture at the connection between the reinforcing plate 2 and the substrate 1 when the battery bottom guard plate is hit by foreign objects, and is conducive to the processing and molding of the battery bottom guard plate. Compared with stamping molding, the die size of extrusion molding is smaller than that of stamping molding for forming battery bottom guard plates of the same size. Therefore, extrusion molding of the battery bottom guard plate is more conducive to saving the manufacturing materials of the mold. In actual implementation, it is preferred that the battery bottom guard plate is extruded from an aluminum alloy plate to save the manufacturing cost of the battery bottom guard plate.

[0041] Preferably, the connection portion between the reinforcing plate 2 and the base plate 1 is provided with an arc segment 5 to provide a smooth transition between the reinforcing plate 2 and the base plate 1 and reduce the probability of fracture of the connection portion between the reinforcing plate 2 and the base plate 1 .

[0042] In another example, the reinforcing plate 2 may also be fixed to the base plate 1 by welding, or the reinforcing plate 2 may be threadedly connected to the base plate 1 via fasteners (such as fastening screws, etc.).

[0043] In one embodiment, the substrate 1 is threadedly connected to the battery module through a connector 8 to facilitate assembly and disassembly of the protective plate and the battery module. In this example, the connector 8 is a connecting screw. The substrate 1 is detachably connected to the battery module through the connector 8. If the deformation of the battery bottom guard plate is not serious, it can be removed from the bottom of the battery module and corrected and repaired by a machine. If the deformation of the battery bottom guard plate is serious, the bottom guard plate can be directly replaced.

[0044] As a preferred embodiment, refer to Figure 3 A reinforcing rib 6 is protruded from one side of the reinforcing plate 2 toward the buffer chamber 4, and the length of the reinforcing rib extends along the second direction. This design enhances the overall structural strength of the reinforcing plate 2 under the action of the reinforcing rib 6, and further enhances the impact resistance of the battery bottom guard plate.

[0045] Optionally, refer to Figure 4 The side of the reinforcing plate 2 facing away from the buffer chamber 4 is provided with an elastic buffer layer 7, specifically, the elastic buffer layer 7 can be an elastic rubber layer. The elastic rubber layer is bonded and fixed to the reinforcing plate, and the elastic buffer layer 7 has the ability of elastic deformation, so that when the vehicle is driving, the flying gravel and other foreign objects or the stones and other foreign objects protruding from the road surface will first collide with the elastic buffer layer 7, and most of the impact force will be buffered by the elastic buffer layer 7, thereby effectively preventing the reinforcing plate 2 from deformation.

[0046] In the battery pack, the base plate 1 of the battery bottom guard plate is connected to the thread of the box body through the connecting member 8, i.e., the connecting bolt. Since the battery pack is provided with a battery bottom guard plate of any of the above structures at the bottom of the battery module, it has the characteristics of light weight and good impact resistance, which is conducive to improving the vehicle's cruising range.

[0047] It should be noted that, in addition to being used in vehicles, the battery pack can also be used in other equipment, and there is no specific restriction on the application equipment of the battery pack.

[0048] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0050] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0051] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A battery bottom guard plate, characterized in that , including a substrate and a plurality of reinforcing plates, the substrate having a first side surface and a second side surface opposite to the first side surface, the battery module of the battery pack is arranged on the first side surface, all the reinforcing plates are protrudingly arranged on the second side surface, all the reinforcing plates are spaced apart along the first direction, and the length of each reinforcing plate extends along the second direction, the second direction is arranged at an angle to the first direction, all the reinforcing plates are bent toward the first direction to form an arc structure, and a buffer chamber is formed between two adjacent reinforcing plates, and the substrate and the reinforcing plates are both aluminum alloy plates.

2. The battery bottom guard plate according to claim 1, characterized in that: Two adjacent reinforcing plates, wherein an end of one of the reinforcing plates away from the first side surface and a side surface of the other reinforcing plate in the first direction have a gap to form an opening, and the opening is communicated with the buffer chamber.

3. The battery bottom guard plate according to claim 1, characterized in that: The reinforcing plate is an arc structure with a central angle of 90°.

4. The battery bottom guard plate according to claim 3, characterized in that: The arc radius of the reinforcing plate is 10mm-30mm.

5. The battery bottom guard plate according to claim 4, characterized in that: The arc radius of the reinforcing plate is 25 mm.

6. The battery bottom guard plate according to claim 1, characterized in that: An arc segment is provided at a connection portion between the reinforcing plate and the base plate.

7. The battery bottom guard plate according to claim 1, characterized in that: The substrate is threadably connected to the battery module via a connector.

8. The battery bottom guard plate according to any one of claims 1 to 7, characterized in that: A reinforcing rib is protruded from one side of the reinforcing plate toward the buffer chamber, and the reinforcing rib extends along the second direction.

9. The battery bottom guard plate according to any one of claims 1 to 7, characterized in that: An elastic buffer layer is arranged on a side of the reinforcing plate facing away from the buffer chamber.

10. A battery pack, characterized in that: It comprises a battery module and the battery bottom guard plate according to any one of claims 1 to 9, wherein the battery module comprises a box body and a battery pack arranged in the box body, the battery bottom guard plate is arranged at the bottom of the box body, and the substrate of the battery bottom guard plate is threadedly connected to the box body through a connecting piece.

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