Battery pack mounting structure, battery pack and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a battery pack mounting structure, a battery pack and a vehicle, the battery pack mounting structure comprises a mounting flange and a mounting nest, the mounting flange is arranged on one side of the battery pack, a first mounting hole is formed in the mounting flange, the mounting nest is embedded in the first mounting hole, and a second mounting hole is formed in the mounting nest. The mounting nest comprises a nest body, a second mounting hole and a plurality of energy absorption parts, the second mounting hole is formed in the nest body and connected with the nest body through the energy absorption parts, a fastener penetrates through the second mounting hole to be connected with a vehicle body, and each energy absorption part is provided with at least one bent section. Due to the fact that the energy absorption piece is provided with at least one bending section, when energy generated by collision in the collision process enables the battery pack, the vehicle body cross beam and other connecting pieces to generate the trend of relative movement at the battery pack connecting point, the energy absorption piece embedded in the energy absorption piece generates plastic deformation, and the crumple energy absorption effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a battery pack installation structure, a battery pack and a vehicle. Background Art

[0002] The weight of the battery pack is positively correlated with the range. The increase in vehicle weight caused by the long-range battery pack places higher requirements on the collision force transmission and energy absorption structure of the vehicle body, which will increase the material and cost of the vehicle body. The battery pack is rigidly connected to the vehicle body. During a collision, most of the energy is absorbed by the anti-collision beam energy absorption box and the plastic deformation of the vehicle body. In order to achieve the corresponding safety star rating and protect the safety of the passenger compartment, the body force transmission beam and force transmission channel must be strengthened accordingly, and the wall thickness of the anti-collision beam and energy absorption box must also be increased accordingly. As a result, the weight of the vehicle body is significantly increased, which is contrary to the goal of lightweighting the vehicle, is not economical, and will also reduce the range.

[0003] In the prior art, energy absorption structures are provided on both sides of the battery pack. The energy absorption structures are energy absorption plates with energy absorption cavities. Generally, the energy absorption structures can only absorb energy when the vehicle is hit head-on, and the energy absorption effect is not ideal when the vehicle is hit sideways. Utility Model Content

[0004] The utility model aims to at least solve the technical problem that the energy absorption structure in the prior art can generally only absorb energy when the vehicle is hit head-on, and the energy absorption effect is not ideal when the vehicle is hit sideways.

[0005] To this end, one object of the utility model is to propose a battery pack mounting structure, which includes a mounting flange and a mounting nest, wherein the mounting flange is arranged on one side of the battery pack, a first mounting hole is opened on the mounting flange, and the mounting nest is embedded in the first mounting hole, the mounting nest includes a nest body, a second mounting hole and a plurality of energy absorbing parts, the second mounting hole is arranged in the nest body and connected to the nest body through the energy absorbing part, a fastener passes through the second mounting hole to be connected to the vehicle body, and each of the energy absorbing parts has at least one bending section.

[0006] In some embodiments, the plurality of energy absorbing members are evenly distributed along the circumference of the second mounting hole, and the inner wall of the nested body, the hole wall of the second mounting hole and two adjacent energy absorbing members form a collapse cavity.

[0007] In some embodiments, the energy absorbing member is a rib plate.

[0008] In some embodiments, the energy absorbing member is in an "S" shape, a "Z" shape or a wave shape.

[0009] In some embodiments, the length of the mounting nest is equal to or less than the depth of the first mounting hole.

[0010] In some embodiments, the load-bearing beam of the vehicle body is arranged on the first side of the mounting flange, the fastener passes through the second mounting hole from the second side of the mounting flange and is connected to the load-bearing beam, a gasket is provided between the load-bearing beam and the first side surface of the mounting flange, and a pad is provided between the fastener and the second side surface of the mounting flange.

[0011] In some embodiments, at least two of the plurality of energy absorbing members are arranged along the front-rear direction of the vehicle body.

[0012] In some embodiments, a stop surface or a stop pin is provided at the position where the first mounting hole is connected to the nested body.

[0013] In some embodiments, the mounting flange is disposed on at least one of the left and right sides of the battery pack.

[0014] In some embodiments, an energy absorption box is also included, which is respectively arranged on the front and rear sides of the battery pack and connected to the vehicle body along the front and rear direction of the vehicle body.

[0015] In some embodiments, the mounting insert is an aluminum alloy extrusion or a rubber extrusion.

[0016] Another object of the present invention is to provide a battery pack, which is connected to a vehicle body via the above-mentioned battery pack mounting structure.

[0017] Another object of the present invention is to provide a vehicle, comprising the above-mentioned battery pack.

[0018] The battery pack installation structure, battery pack and vehicle provided by the embodiment of the utility model have the following beneficial effects:

[0019] The battery pack mounting structure includes a mounting flange and a mounting nesting, wherein the mounting flange is arranged on one side of the battery pack, a first mounting hole is formed on the mounting flange, the mounting nesting is embedded in the first mounting hole, the mounting nesting includes a nesting body, a second mounting hole and a plurality of energy absorbing members, the second mounting hole is arranged in the nesting body, and is connected to the nesting body through the energy absorbing member, the fastener passes through the second mounting hole and is connected to the vehicle body, each energy absorbing member has at least one bending section, during a collision, when the energy generated by the collision makes the battery pack and the connecting members such as the vehicle body cross beam have a tendency to move relative to each other at the battery pack connection point, the energy absorbing member of the mounting nesting itself generates plastic deformation to achieve collapse energy absorption, thereby improving the energy absorption effect;

[0020] Part of the battery pack's own potential energy is transferred to the vehicle body, and the other part is absorbed by the crushing deformation of the installation nesting. Under the same collision regulations and star rating, part of the battery pack's own kinetic energy is absorbed by the installation nesting, which can reduce the material used in the vehicle's force transmission channel, save production costs, and thus reduce the overall weight of the vehicle and improve endurance; under the same body material and body structure, increasing the installation nesting can improve the collision star rating, reduce the amount of intrusion into the passenger compartment, and protect the safety of the occupants to a greater extent, while reducing the degree of damage to the collision site and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a three-dimensional diagram of a battery pack installation structure in an embodiment of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of the installation and nesting in the embodiment of the utility model;

[0024] Figure 3 It is a partial enlarged view of a battery pack installation structure in an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the installation status of a battery pack installation structure, a battery pack and a load-bearing beam in an embodiment of the utility model.

[0026] Reference numerals:

[0027] 1. Mounting flange; 2. Mounting nesting; 21. Nesting body; 22. Second mounting hole; 23. Energy absorbing member; 231. Bending section; 232. Collapse chamber; 3. First mounting hole; 4. Fastener; 41. Fixing bolt; 42. Fixing nut; 5. Stop pin; 6. Pin hole; 7. Energy absorbing box; 8. Washer; 9. Pad; 100. Battery pack; 200. Load-bearing beam. DETAILED DESCRIPTION

[0028] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0029] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of the embodiments. Other modifications within the scope and spirit of the present utility model will occur to those skilled in the art.

[0030] The accompanying drawings, which are included in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, are used to explain the principles of the present invention.

[0031] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0032] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present invention that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0033] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0034] Specific embodiments of the present invention are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present invention. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of ways with substantially any suitable detailed structure.

[0035] The first embodiment of the present utility model provides a battery pack installation structure, such as Figure 1-Figure 4 As shown, the battery pack 100 is arranged inside the vehicle through the battery pack mounting structure. The battery pack mounting structure includes a mounting flange 1 and a mounting nest 2. The mounting flange 1 is arranged on one side of the battery pack 100. A first mounting hole 3 is opened on the mounting flange 1. The mounting nest 2 is embedded in the first mounting hole 3. The mounting nest 2 includes a nest body 21, a second mounting hole 22 and a plurality of energy absorbing members 23. The second mounting hole 22 is arranged in the nest body 21 and is connected to the nest body 21 through the energy absorbing member 23. The fastener 4 passes through the second mounting hole 22 and is connected to the vehicle body. Each energy absorbing member 23 has at least one bending section 231.

[0036] Specifically, the mounting flange 1 extends outward along one side of the battery pack 100, and is provided with a first mounting hole 3 for accommodating the mounting nest 2, wherein the nest body 21 cooperates with the hole wall of the first mounting hole 3, and the energy absorbing member 23 is connected to the nest body 21 and has at least one bending section 231. When the vehicle is hit, the energy generated by the collision causes the battery pack 100 and the connecting parts such as the vehicle body cross beam to have a tendency of relative movement at the connection point of the battery pack 100. The energy absorbing member 23 absorbs energy along the bending section 231, thereby reducing the collision energy transmitted to the battery pack 100, which is beneficial to maintaining the installation reliability of the battery pack 100 and avoiding damage to the battery pack 100 due to a large collision, thereby increasing the service life of the battery pack 100. Among them, the energy of daily driving and minor collisions is small and will not exceed the self-strength of the installation nest 2. The installation nest 2 will not collapse and absorb energy. Under a collision energy greater than a certain value (i.e., overcoming the friction of the installation point and the self-strength of the installation nest 2), the installation nest 2 will collapse and absorb energy. Part of the potential energy of the battery pack 100 itself is transferred to the vehicle body, and the other part is absorbed by the collapse and deformation of the installation nest 2. In this way, the energy that the vehicle body needs to absorb will be reduced.

[0037] Regardless of the head-on collision, rear-end collision or side collision, the energy absorbing member 23 will be deformed first at the moment of collision to achieve induced energy absorption. After the energy absorbing member 23 participates in energy absorption, the deformation of the position of the head-on collision is reduced. Since the kinetic energy of the vehicle is constant during operation, if the battery pack 100 absorbs part of its own energy by installing the nest 2, the protection capability of the collision position to the passenger compartment will be improved (for example, the intrusion amount of the passenger compartment will be reduced).

[0038] A plurality of first mounting holes 3 may be arranged at intervals along the mounting flange 1 , and a mounting nest 2 is arranged in each first mounting hole 3 . By arranging a plurality of mounting nests 2 , the energy absorption effect when the vehicle is hit is ensured.

[0039] Among them, multiple energy absorbing members 23 are evenly distributed along the circumference of the second mounting hole 22, which is conducive to realizing the crushing energy absorption of the vehicle in various situations such as head-on collision, rear collision and side collision. Specifically, the inner wall of the nested body 21, the hole wall of the second mounting hole 22 and the two adjacent energy absorbing members 23 form a crush cavity 232. When the nested body 21 is installed to crush and absorb energy, the crush cavity 232 also crushes and absorbs energy.

[0040] Take the installation nest 2 having four energy absorbing members 23 as an example for explanation. During a collision, the installation nest 2 undergoes plastic deformation, one side compresses to absorb energy, the opposite side stretches to absorb energy, and the other two sides assist in deformation to absorb energy. Since the vehicle is more likely to be hit head-on and rear-end, two of the four energy absorbing members 23 are arranged along the front-to-back direction of the vehicle body, and the other two energy absorbing members 23 are arranged along the width direction of the vehicle body.

[0041] The wall thickness of the nested body 21 needs to be finally determined through virtual verification based on the vehicle weight target and the weight of the battery pack 100, and also needs to meet the collision regulations and star ratings.

[0042] The energy absorbing member 23 is configured as a plate-like structure. Compared with a tubular structure, the plate-like structure has a relatively large cross-sectional area to ensure its energy absorbing capacity. Exemplarily, the energy absorbing member 23 is a rib plate.

[0043] like Figure 2 As shown, the bending section 231 provided on the energy absorbing member 23 provides a path for collision energy absorption, and the collision energy reaching the battery pack 100 can be partially buffered, and at the same time, part of the energy reaching the battery pack 100 can be absorbed by the collapse of the bending section 231. Exemplarily, the energy absorbing member 23 is in an "S" shape, a "Z" shape, or a wave shape.

[0044] The installation nest 2 is an aluminum alloy extrusion or a rubber extrusion. In the present embodiment, since aluminum alloy is convenient for processing and forming, it is preferably an aluminum alloy extrusion.

[0045] The nested body 21 is extruded according to the designed outer diameter size + 0.5 mm (machining allowance), and the inner wall of the second mounting hole 22 is extruded according to the designed inner diameter size - 0.5 mm (machining allowance), and then a certain length of the blank is cut out.

[0046] The mounting nest 2 is pressed into the first mounting hole 3 along the height direction of the vehicle body, and the length of the mounting nest 2 is equal to or less than the depth of the first mounting hole 3. The mounting nest 2 is entirely disposed in the first mounting hole 3, and the mounting nest 2 can be supported by the mounting flange 1, thereby extending the service life of the mounting nest 2.

[0047] like Figure 3 As shown, when the installation nest 2 is installed into the first installation hole 3, in order to ensure that it will not move after the installation is completed, a stop pin 5 is provided at the position where the first installation hole 3 connects with the nest body 21. Specifically, a pin hole 6 is provided at the position where the nest body 21 and the installation flange 1 match, a part of the pin hole 6 is provided at the installation flange 1, and another part of the pin hole 6 is provided at the nest body 21. When the two parts of the pin hole 6 are butted, it means that the installation nest 2 has reached the preset position, and the stop pin 5 is provided in the pin hole 6, that is, the installation work of the installation nest 2 is completed.

[0048] In addition, when the installation nest 2 is installed into the first installation hole 3, in order to ensure that it will not move after the installation is completed, a stop surface can also be provided at the position where the first installation hole 3 connects with the nest body 21. Specifically, the first stop surface is provided on the periphery of the nest body 21, and the second stop surface cooperating with the first stop surface is provided on the inner wall of the first installation hole 3. The first stop surface and the second stop surface are both planes, and the two cooperate with each other to prevent relative movement between the installation nest 2 and the mounting flange 1.

[0049] like Figure 4 As shown, the load-bearing beam 200 of the vehicle body is arranged on the first side of the mounting flange 1, wherein the load-bearing beam 200 of the vehicle body is a longitudinal beam of the vehicle body, and the fastener 4 passes through the second mounting hole 22 from the second side of the mounting flange 1 to connect with the load-bearing beam 200. Specifically, the fastener 4 includes a fixing bolt 41 and a fixing nut 42. The fixing bolt 41 passes through the mounting flange 1 and the load-bearing beam 200 of the vehicle body in sequence and is fixed by the fixing nut 42, connecting the mounting nest 2 with the load-bearing beam 200 of the vehicle body, thereby improving the connection reliability of the mounting nest 2. The fixing nut 42 can be pre-fixed on the load-bearing beam 200, so as to facilitate positioning when installing the fastener 4 and improve installation efficiency.

[0050] A gasket 8 is provided between the load-bearing beam 200 and the first side surface of the mounting flange 1 to prevent abnormal noise and achieve a flexible connection between the battery pack 100 and the vehicle body. Exemplarily, the gasket 8 is a polyurethane gasket.

[0051] A backing plate 9 is provided between the fastener 4 and the second side surface of the mounting flange 1. The backing plate 9 and the fixing bolts 41 jointly bear the weight of the battery pack 100.

[0052] The mounting nest 2 is made of aluminum alloy extrusions, which is low in cost, and the mounting nest 2 is installed with the battery pack 100 and the load-bearing beam 200 of the vehicle body through fasteners 4, and is easy to disassemble and replace after energy absorption and collapse.

[0053] Another object of the present invention is to provide a battery pack 100 , which is connected to a vehicle body via the above-mentioned battery pack mounting structure.

[0054] Among them, the battery pack 100 can collapse and absorb energy when the vehicle is hit head-on, rear-end or sideways, and the battery pack 100 will have a certain displacement relative to the vehicle body (the displacement is positively correlated with the size of the energy absorbing member 23). Therefore, a space corresponding to the displacement needs to be reserved between the battery pack 100 and the vehicle body on the basis of the original standard.

[0055] Another object of the present invention is to provide a vehicle, comprising the above-mentioned battery pack.

[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 the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0058] In the description of the present invention, "plurality" means two or more.

[0059] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0060] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0061] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack installation structure, characterized in that: It includes a mounting flange and a mounting nest, wherein the mounting flange is arranged on one side of the battery pack, a first mounting hole is opened on the mounting flange, and the mounting nest is embedded in the first mounting hole. The mounting nest includes a nest body, a second mounting hole and a plurality of energy absorbing parts, wherein the second mounting hole is arranged in the nest body and connected to the nest body through the energy absorbing part, a fastener passes through the second mounting hole and is connected to the vehicle body, and each of the energy absorbing parts has at least one bending section.

2. A battery pack installation structure according to claim 1, characterized in that: The plurality of energy absorbing members are evenly distributed along the circumference of the second mounting hole, and the inner wall of the nested body, the hole wall of the second mounting hole and two adjacent energy absorbing members form a collapse cavity.

3. A battery pack installation structure according to claim 1, characterized in that: The energy absorbing member is a rib plate; and / or The energy absorbing member is in an "S" shape, a "Z" shape or a wave shape.

4. A battery pack installation structure according to claim 1, characterized in that: The length of the mounting nest is equal to or less than the depth of the first mounting hole.

5. A battery pack installation structure according to claim 1, characterized in that: The load-bearing beam of the vehicle body is arranged on the first side of the mounting flange, the fastener passes through the second mounting hole from the second side of the mounting flange and is connected to the load-bearing beam, a gasket is provided between the load-bearing beam and the first side surface of the mounting flange, and a pad is provided between the fastener and the second side surface of the mounting flange.

6. A battery pack installation structure according to claim 1, characterized in that: At least two of the plurality of energy absorbing members are arranged along the front-rear direction of the vehicle body; and / or A stop surface or a stop pin is provided at a position where the first mounting hole is connected to the nested body.

7. A battery pack installation structure according to claim 1, characterized in that: The mounting flange is disposed on at least one of the left and right sides of the battery pack.

8. A battery pack installation structure according to claim 1, characterized in that: The mounting nest is an aluminum alloy extrusion piece or a rubber extrusion piece.

9. A battery pack, characterized in that: The battery pack is connected to the vehicle body via the battery pack mounting structure described in any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery pack comprising the battery pack described in claim 9.

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