Edge beam, battery pack and power device

Abstract

The utility model provides an edge beam, a battery pack and a power plant, the edge beam comprises a first beam body, the first beam body is internally provided with a first cavity, the first beam body is internally provided with a first reinforcing rib, and the first reinforcing rib divides the first cavity into a first chamber and a second chamber; a second cavity is formed in the second beam body, a second reinforcing rib is arranged in the second cavity, and the second cavity is divided into a third cavity and a fourth cavity by the second reinforcing rib; the side end face of the second beam body is fixedly kept on the side wall of the first beam body. According to the edge beam, the use quality of the battery pack can be improved by optimizing the structure of the edge beam.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a side beam. The utility model also relates to a battery pack provided with the above side beam and a power device provided with the above battery pack. Background Art

[0002] With the rapid development and iteration of the automotive industry, the cost of battery packs has become particularly prominent. At the same time, during the driving of electric vehicles, various complex working conditions will be encountered. In order to improve the ability of the battery pack to cope with various working conditions, it is necessary to improve the structural strength of the battery pack, and the design method of the battery pack structure directly affects the overall safety performance of the battery pack.

[0003] With the increasing attention to safety performance and energy, the safety performance of battery packs has become even more important. With the development of new processes and new technologies, various forms of battery pack structures have emerged. With the continuous improvement of the energy density of battery packs, a highly integrated battery pack structure is particularly important.

[0004] Currently, the commonly used side beam structure of battery packs is made of aluminum profiles, while relatively few use high-strength rolled steel as the side beam. This is mainly because the existing rolled steel side beam structure is difficult to meet the requirements of side column collision during the overall package side column collision, which is not conducive to improving the use quality of battery packs using the rolled steel side beam structure. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a side beam to improve the use quality of the battery pack by optimizing the side beam structure.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A side beam, comprising:

[0008] A first beam body, which has a first cavity inside, and a first reinforcing rib is provided inside the first beam body, and the first reinforcing rib divides the first cavity into a first chamber and a second chamber;

[0009] A second beam body, which has a second cavity inside, and a second reinforcing rib is provided inside the second cavity, and the second reinforcing rib divides the second cavity into a third chamber and a fourth chamber;

[0010] The side end face of the second beam body is fixedly held on the side wall of the first beam body.

[0011] Furthermore, the cross-sections of the first cavity and the second cavity are both rectangular; and / or,

[0012] The cross-sectional shapes of the first chamber, the second chamber, the third chamber, and the fourth chamber are any one of a rectangle or a right trapezoid.

[0013] Furthermore, the first beam body and the second beam body are formed by rolling and bending a same sheet material.

[0014] Furthermore, the length A of the second beam body is 1.5 to 2.5 times the width B of the first beam body.

[0015] Furthermore, an energy absorption member is filled in the first cavity and / or the second cavity.

[0016] Furthermore, the energy absorption member is made of any one of an aluminum foam member, a foamed polypropylene member, or a high-density PP member.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] For the side beam of the present utility model, the first reinforcing rib in the first beam body and the second reinforcing rib in the second beam body can enhance the structural strength of the side beam, so that the side beam can better resist mechanical impacts. The settings of the first cavity and the second cavity optimize the energy absorption performance of the side beam, improve the structural strength of the side beam, and are beneficial to improving the structural strength of the battery pack, thereby improving the use quality of the battery pack.

[0019] Making the cross-sectional shapes of the first cavity and the second cavity both be rectangles is beneficial to improving the structural strength of the side beam. When the cross-sectional shapes of the first chamber, the second chamber, the third chamber, and the fourth chamber are all right trapezoids, the first reinforcing rib and the second reinforcing rib are both inclined, which better improves the structural strength of the side beam and is beneficial to improving the structural strength of the battery pack.

[0020] Making the first beam body and the second beam body both be formed by rolling and bending a same sheet material is beneficial to processing and helps with the design and implementation.

[0021] Making the length A of the second beam body be 1.5 to 2.5 times the width B of the first beam body is beneficial to improving the structural strength of the side beam and helps with the design and implementation.

[0022] Through the setting of the energy absorption member, the ability of the side beam to resist mechanical impacts is better improved, the energy absorption effect of the side beam is enhanced, and it helps with the design and implementation.

[0023] Making the energy absorption member be made of aluminum foam, foamed polypropylene, or high-density PP material is convenient for processing and beneficial to the design and implementation.

[0024] The present utility model also provides a battery pack, in which the side beam as described above is assembled.

[0025] Further, it further includes a module pressing plate, which is fixedly held on the lower housing of the battery pack to confine the battery module within the battery pack.

[0026] Further, the module pressing plate is provided with a first connecting ear, a second connecting ear and a third connecting ear;

[0027] The first connecting ear includes a first extension portion that extends obliquely in the height direction of the battery pack from the module pressing plate, and a second extension portion that extends in the width direction of the battery pack from the first extension portion;

[0028] The second connecting ear includes a third extension portion that extends vertically in the height direction of the battery pack from the module pressing plate, and a fourth extension portion that extends in the width direction of the battery pack from the third extension portion;

[0029] The third connecting ear includes a fifth extension portion that extends vertically in the height direction of the battery pack from the module pressing plate, and a sixth extension portion that extends in the width direction of the battery pack from the fifth extension portion, and a boss is formed on the sixth extension portion.

[0030] The present utility model further provides a power device, and the battery pack as described above is assembled in the power device.

[0031] The battery pack and the power device of the present utility model have the same beneficial effects compared with the side beam in the present utility model as compared with the prior art, so they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0033] Figure 1 is a schematic structural diagram of the side beam according to an embodiment of the present utility model;

[0034] Figure 2 is a first schematic structural diagram of the cross-section of the side beam according to an embodiment of the present utility model;

[0035] Figure 3 is a second schematic structural diagram of the cross-section of the side beam according to an embodiment of the present utility model;

[0036] Figure 4 is a third schematic structural diagram of the cross-section of the side beam according to an embodiment of the present utility model;

[0037] Figure 5 is a schematic structural relationship diagram of the side beam and the battery cell according to an embodiment of the present utility model;

[0038] Figure 6 Structural schematic diagram of the module pressing plate according to an embodiment of the present utility model;

[0039] Figure 7 Structural schematic diagram of the battery pack according to an embodiment of the present utility model;

[0040] Explanation of reference numerals:

[0041] 1, First beam body;

[0042] 101, Side wall;

[0043] 2, Second beam body;

[0044] 201, Side end face;

[0045] 3, First cavity;

[0046] 301, First chamber; 302, Second chamber;

[0047] 4, First reinforcing rib;

[0048] 5, Second cavity;

[0049] 501, Third chamber; 502, Fourth chamber;

[0050] 6, Second reinforcing rib; 7, Battery cell; 8, Module pressing plate; 9, First connecting ear; 10, Second connecting ear; 11, Third connecting ear. Detailed implementation manners

[0051] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0052] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] Taking the battery pack where the side beam described in the present utility model is located as an example, the orientation words such as "up, down, left, right, front, and back" used in the embodiments are defined based on the up-down direction (also known as the height direction or the overall package Z-direction), left-right direction (also known as the width direction or the overall package Y-direction), and front-back direction (also known as the length direction or the overall package X-direction) of the vehicle. "Inside and outside" are defined based on the outline of the corresponding component. For example, "inside" and "outside" defined based on the outline of the battery pack, with the side closer to the middle of the battery pack being "inside" and vice versa.

[0054] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0055] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0056] Embodiment 1

[0057] This embodiment relates to a side beam, aiming to improve the service quality of the battery pack by optimizing the side beam structure.

[0058] In terms of the overall structure, as Figure 1 shown, the side beam in this embodiment includes a first beam body 1 and a second beam body 2.

[0059] Among them, the first beam body 1 has a first cavity 3 inside, and a first reinforcing rib 4 is provided in the first cavity 3. The first reinforcing rib 4 divides the first cavity 3 into a first chamber 301 and a second chamber 302. The second beam body 2 has a second cavity 5 inside, and a second reinforcing rib 6 is provided in the second cavity 5. The second reinforcing rib 6 divides the second cavity 5 into a third chamber 501 and a fourth chamber 502. The side end face 201 of the second beam body 2 is fixedly held on the side wall 101 of the first beam body 1.

[0060] With the above settings, the side beam in this embodiment can enhance the structural strength of the side beam through the first reinforcing rib 4 in the first beam body 1 and the second reinforcing rib 6 in the second beam body 2, enabling the side beam to better resist mechanical impacts. The settings of the first cavity 3 and the second cavity 5 optimize the energy absorption performance of the side beam, improve the structural strength of the side beam, and thus contribute to enhancing the structural strength of the battery pack, thereby improving the service quality of the battery pack.

[0061] Specifically, in this embodiment, as an exemplary structure, in combination withFigures 2 to 4 As shown, in order to better improve the structural strength of the side beam, the cross-sections of the first cavity 3 and the second cavity 5 of the side beam in this embodiment are both rectangular, and the cross-sections of the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502 are all right trapezoids. Making the cross-sections of the first cavity 3 and the second cavity 5 rectangular is beneficial to improving the structural strength of the side beam. When the cross-sections of the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502 are all right trapezoids, the first reinforcing rib 4 and the second reinforcing rib 6 are both inclined, which better improves the structural strength of the side beam and is beneficial to improving the structural strength of the battery pack.

[0062] More specifically, in combination with Figure 2 and Figure 5 As shown, when the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502 are all right trapezoids, the first reinforcing rib 4 and the second reinforcing rib 6 respectively form the hypotenuses of the right trapezoids corresponding to the cross-sections of the chambers. At this time, the relationship between the inclination angle D of the reinforcing rib, the distance C between the side beam and the battery cell 7, and the intrusion amount δ of the battery cell 7 is: δ = aD - bC, where 0.1 ≤ a ≤ 0.5 and b ≥ 1.2a. Here, the intrusion amount δ of the battery cell 7 represents the length of intrusion into the battery cell when the side beam deforms. By adjusting the inclination angle D of the reinforcing rib or adjusting the distance C between the side beam and the battery cell 7, it is possible to prevent the side beam from squeezing the battery cell 7 during a side pole collision.

[0063] The second structure of the side beam in this embodiment is combined with Figure 3 As shown, the cross-sections of the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502 can also be rectangular. However, when the cross-sections of the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502 are rectangular, there is a risk of intruding into the top of the battery cell 7 during a side pole collision. Therefore, it is necessary to increase the width B of the first beam body 1 to avoid the risk of intruding into the top of the battery cell 7.

[0064] The third structure of the side beam in this embodiment is as shown in Figure 4 As shown, the first beam body 1 and the second beam body 2 of the side beam are roll-formed and bent from the same sheet material, so that the first beam body 1 and the second beam body 2 are both roll-formed and bent from the same sheet material, which is beneficial to processing and helps with the design and implementation.

[0065] In order to better improve the structural strength of the side beam, in combination with Figure 2As shown, in this embodiment, the length A of the second beam body 2 of the side beam is 1.5 to 2.5 times the width B of the first beam body 1. In this embodiment, for example, the length A of the second beam body 2 is 1.5 times the width B of the first beam body 1. Of course, it can also be 2 times or 2.5 times, as long as the structural strength requirements of the side beam are met, so that the length A of the second beam body 2 is 1.5 to 2.5 times the width B of the first beam body 1, which is beneficial to improving the structural strength of the side beam and helps with the design implementation.

[0066] In order to better improve the energy absorption effect of the side beam, energy absorption components are filled in both the first cavity 3 and the second cavity 5 of the side beam in this embodiment. Through the setting of the energy absorption components, the ability of the side beam to resist mechanical impact is better improved, the energy absorption effect of the side beam is improved, and it helps with the design implementation.

[0067] Specifically, in this embodiment, energy absorption components are provided in the first chamber 301, the second chamber 302, the third chamber 501, and the fourth chamber 502. The material of the energy absorption component can be made of, for example, aluminum foam, foamed polypropylene, or high-density PP material, as long as it can play a good energy absorption role. Making the energy absorption component of aluminum foam, foamed polypropylene, or high-density PP material is convenient for processing and helps with the design implementation.

[0068] Specifically, the energy absorption component provided in the side beam and the beam body of the side beam form a multi-level sandwich structure. The energy absorption component is sandwiched between the beam bodies, which has high structural strength and a buffer energy absorption effect, thus being beneficial to improving the use quality of the battery pack.

[0069] When the side beam of this embodiment is in use, the first beam body 1 can be used as the side beam of the battery pack, and the second beam body 2 can be used as the mounting beam of the battery pack. Through the setting of the first beam body 1, the second beam body 2, the first reinforcing rib 4, the second reinforcing rib 6, and the energy absorption component in this embodiment, on the basis of ensuring that the side beam has good structural strength, it also has a good energy absorption effect. Moreover, the beam body of the side beam is formed by roll pressing steel, which has sufficient rigidity and optimizes the side column collision performance of the battery pack, being beneficial to improving the use quality of the battery pack.

[0070] Embodiment Two

[0071] This embodiment relates to a battery pack, and the side beam in Embodiment One is assembled in the battery pack in this embodiment.

[0072] Specifically, as an exemplary structure, in combination with Figure 6 and Figure 7 shown, the battery pack in this embodiment further includes a module pressing plate 8, and the module pressing plate 8 is fixedly held on the lower housing of the battery pack to constrain the battery module in the battery pack.

[0073] More specifically, in combination with Figure 6 andFigure 7 As shown, in this embodiment, the module pressing plate 8 is provided with a first connecting ear 9, a second connecting ear 10 and a third connecting ear 11. Among them, the first connecting ear 9 includes a first extending portion that extends obliquely in the height direction of the battery pack from the module pressing plate 8, and a second extending portion that extends in the width direction of the battery pack from the first extending portion. The second connecting ear 10 includes a third extending portion that extends vertically in the height direction of the battery pack from the module pressing plate 8, and a fourth extending portion that extends in the width direction of the battery pack from the third extending portion. The third connecting ear 11 includes a fifth extending portion that extends vertically in the height direction of the battery pack from the module pressing plate 8, and a sixth extending portion that extends in the width direction of the battery pack from the fifth extending portion, and a boss is formed on the sixth extending portion.

[0074] When the module pressing plate 8 of the battery pack in this embodiment is in use, the first connecting ear 9 is connected to the battery module, the second connecting ear 10 is connected to the front and rear cross beams of the battery pack, the third connecting ear 11 is connected to the cross beam, and the arrangement and installation of the copper row are available under the boss.

[0075] By adopting the side beam in the first embodiment, the battery pack of this embodiment not only has good structural strength but also has good energy absorption effect on the premise of ensuring the side beam has good structural strength. Moreover, the beam body of the side beam is formed by roll pressing steel, which has sufficient rigidity and optimizes the side column collision performance of the battery pack, which is beneficial to improving the use quality of the battery pack.

[0076] Embodiment Three

[0077] This embodiment relates to a power device, and the battery pack in the second embodiment is assembled in the power device in this embodiment.

[0078] In the power device of this embodiment, through the setting of the battery pack in the second embodiment, the battery pack in the power device has good structural strength, which helps to improve the use quality of the power device.

[0079] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A side beam, characterized in that, Including: A first beam body, within which there is a first cavity, and in the first beam body, there is a first reinforcing rib, which divides the first cavity into a first chamber and a second chamber; A second beam body, within which there is a second cavity, and in the second cavity, there is a second reinforcing rib, which divides the second cavity into a third chamber and a fourth chamber; The side end face of the second beam body is fixedly held on the side wall of the first beam body.

2. The side beam according to claim 1, wherein: The cross-sections of the first cavity and the second cavity are both rectangular; and / or, The cross-sections of the first chamber, the second chamber, the third chamber, and the fourth chamber are any one of rectangular or right trapezoidal.

3. The side beam according to claim 2, wherein: The first beam body and the second beam body are formed by rolling and bending a same sheet material.

4. The side beam according to any one of claims 1-3, wherein: The length A of the second beam body is 1.5 to 2.5 times the width B of the first beam body; and / or, The relationship among the inclination angle D of the first reinforcing rib, the distance C between the side beam and the battery cell, and the intrusion amount δ of the battery cell is: δ = aD - bC, where 0.1 ≤ a ≤ 0.5 and b ≥ 1.2a.

5. The side beam according to claim 4, wherein: An energy absorption member is filled in the first cavity and / or the second cavity.

6. The side beam according to claim 5, wherein: The energy absorption member is made of any one of an aluminum foam member, a foamed polypropylene member, or a high-density PP member.

7. A battery pack, wherein: The battery pack is assembled with the side beam according to any one of claims 1-6.

8. The battery pack according to claim 7, wherein: It further includes a module pressing plate, which is fixedly held on the lower housing of the battery pack to constrain the battery module within the battery pack.

9. The battery pack according to claim 8, wherein: The module pressing plate is provided with a first connecting ear, a second connecting ear, and a third connecting ear; The first connecting ear includes a first extending portion that extends obliquely in the height direction of the battery pack from the module pressing plate, and a second extending portion that extends in the width direction of the battery pack from the first extending portion; The second connecting ear includes a third extending portion that extends vertically in the height direction of the battery pack from the module pressing plate, and a fourth extending portion that extends in the width direction of the battery pack from the third extending portion; The third connecting ear includes a fifth extending portion that extends vertically in the height direction of the battery pack from the module pressing plate, and a sixth extending portion that extends in the width direction of the battery pack from the fifth extending portion, and a boss is formed on the sixth extending portion.

10. A power device, wherein: The power device is assembled with the battery pack according to any one of claims 7-9.

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