Carrier frame, battery pack and electric vehicle

Abstract

This disclosure relates to a carrier frame, a battery pack, and an electric vehicle. The carrier frame for the battery pack includes: a frame comprising two pairs of opposing side beams; a crossbeam connecting the first pair of opposing side beams to the frame; and a reinforcing beam fixed to the second pair of opposing side beams of the frame and fixed to the crossbeam.

Description

Technical Field

[0001] The embodiments of this disclosure relate to a carrier frame, a battery pack including the carrier frame, and an electric vehicle including the battery pack. Background Technology

[0002] A battery module is formed by connecting multiple battery cells in series and / or in parallel. A battery module is formed by interconnecting the electrode terminals of multiple battery cells (where the number of battery cells and the connection configuration depend on the desired power amount) to provide a high-power rechargeable battery.

[0003] Battery modules can be constructed using either a block design or a modular design. In a block design, each battery cell is integrated into a common current collector structure and a common battery management system, and the cells are arranged within a housing. In a modular design, multiple battery cells are connected together to form sub-modules, and several sub-modules are connected together to form a battery module. In automotive applications, battery systems typically comprise multiple battery modules connected in series to provide a desired voltage.

[0004] A battery pack is a group of any number of (typically identical) battery modules or individual battery cells. Battery modules or (correspondingly) battery cells can be connected in series, parallel, or series / parallel configurations to deliver desired voltage, capacity, and / or power density. The components of a battery pack include individual battery modules and interconnections that provide conductivity between the battery modules.

[0005] Battery packs require suitable mechanical connections, such as between the various components of the battery modules and between the battery modules and the vehicle's support structure. These connections should remain functional and safe throughout the entire average lifespan of the battery system. Furthermore, they should meet design standards for installation space and interchangeability, especially in mobile applications.

[0006] Mechanical integration of the battery module can be achieved by providing a carrier frame and positioning the battery module thereon. Securing the individual battery cells or battery module to the carrier frame can be done via mating recesses in the carrier frame or via mechanical interconnects such as bolts or screws. Alternatively, the battery module can be confined by fastening side panels to the lateral sides of the carrier frame. In some cases, a cover plate can be secured to the top and bottom of the battery module.

[0007] The battery pack's carrier frame is mounted to the vehicle's load-bearing structure. When the battery pack is to be secured to the bottom of the vehicle, a mechanical connection is established from the bottom side via bolts, for example, passing through the carrier frame. The frame is typically made of aluminum or aluminum alloy to reduce the overall weight of the structure.

[0008] Traditional battery systems, even those employing any modular structure, typically include a battery casing. This casing acts as an enclosure to seal the battery system from environmental influences and provides structural protection for the battery system's components. Battery systems with casings are usually installed as a whole into their application environments, such as electric vehicles. Therefore, replacing a defective or damaged system component (e.g., a defective battery sub-module) requires disassembling the entire battery system and removing its casing. Even defects in small and / or inexpensive system components can lead to the disassembly and replacement of the entire battery system, as well as its individual repair. Because high-capacity battery systems are expensive, large, and heavy, this process is cumbersome, and storing large battery systems, for example, in a mechanic's workshop is difficult. Summary of the Invention

[0009] In automotive applications, the stiffness and frequency reduction of battery system components are important issues and related design considerations. However, these issues are even more pronounced in ultra-large battery packs. Ultra-large batteries should avoid structural problems due to their length and width. A specific challenge in EV battery development is achieving sufficient stiffness in the battery pack while suppressing certain frequencies (which may be problematic during long-term use).

[0010] Therefore, according to embodiments of the present disclosure, a reinforced carrier frame for a battery pack in an electric vehicle is provided.

[0011] This disclosure is defined by the appended claims and their equivalents. The following description is subject to this limitation. Any disclosure outside the scope of the claims and their equivalents is intended for illustrative and comparative purposes.

[0012] According to an embodiment of the present disclosure, a carrier frame for a battery pack for an electric vehicle includes: a frame including two pairs of opposing side beams; a crossbeam connecting the first pair of opposing side beams; and a reinforcing beam fixed to the second pair of opposing side beams and fixed to the crossbeam.

[0013] According to another embodiment of this disclosure, a battery pack includes a carrier frame as described above.

[0014] Another embodiment of this disclosure provides an electric vehicle that includes the battery pack described above.

[0015] Further aspects and features of this disclosure may be understood from the following description and the appended claims. Attached Figure Description

[0016] The aspects and features of this disclosure will become apparent to those skilled in the art from the detailed description of embodiments thereof with reference to the accompanying drawings, in which:

[0017] Figure 1This is a schematic bottom perspective view of the carrier frame according to the embodiment.

[0018] Figure 2 This is a schematic perspective view of the reinforcing beam according to the implementation method.

[0019] Figure 3 This is a schematic perspective view of the reinforcing beam according to the same embodiment, viewed from another angle.

[0020] Figure 4 It is along Figure 3 A schematic sectional view of the reinforced beam taken by line A-A'.

[0021] Figure 5 According to another embodiment, along Figure 3 A schematic sectional view of the reinforced beam taken by line B-B'.

[0022] Figure 6 This is a schematic diagram of an electric vehicle according to an embodiment. Detailed Implementation

[0023] Reference will now be made in detail to embodiments, examples of which are shown in the accompanying drawings. Aspects and features of the embodiments will now be described with reference to the accompanying drawings.

[0024] It will be understood that when an element or layer is referred to as being "on" another element or layer, "connected" to another element or layer, or "bonded" to another element or layer, it can be directly on, directly connected to, or directly bonded to the other element or layer, or there may be one or more intermediate elements or layers. When an element or layer is referred to as being "directly on" another element or layer, "directly connected" to another element or layer, or "directly bonded" to another element or layer, there are no intermediate elements or layers. For example, when a first element is described as being "bonded" or "connected" to a second element, the first element can be directly bonded or connected to the second element, or the first element can be indirectly bonded or connected to the second element via one or more intermediate elements.

[0025] In the accompanying drawings, the dimensions of various elements, layers, etc., may be exaggerated for clarity. The same reference numerals denote the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Furthermore, when describing embodiments of this disclosure, the use of "may" refers to "one or more embodiments of this disclosure." Expressions such as "at least one of..." and "any one of..." modify the entire list of elements, not individual elements within that list, when following a list of elements. For example, the expression "at least one of a, b, or c" means only a, only b, only c, both a and b, both a and c, both b and c, all or variations thereof. As used herein, the terms "use," "using," and "being used" may be considered synonymous with the terms "utilize," "using," and "being exploited," respectively. As used herein, the terms "substantially," "about," and similar terms are used as approximate terms rather than terms of degree and are intended to account for inherent variations in measured or calculated values ​​that will be recognized by one of ordinary skill in the art.

[0026] It will be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first area, first layer, or first portion discussed below may be referred to as a second element, second component, second area, second layer, or second portion.

[0027] For ease of description, spatial relational terms such as “below,” “under,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship of one element or feature to another element or feature as shown in the figure. It will be understood that, in addition to the orientation depicted in the figure, spatial relational terms are intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features will be oriented as “above” or “on” other elements or features. Therefore, the term “below” can cover both upper and lower orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relational descriptions used herein should be interpreted accordingly. Here, the terms “upper” and “lower” are defined according to the Z-axis. For example, the upper cover is positioned at the upper part of the Z-axis, and the lower cover is positioned at its lower part.

[0028] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to be limiting of this disclosure. As used herein, the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that, when used in this specification, the terms “comprising,” “including,” “including,” and / or “containing” indicate the presence of stated features, numbers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and / or groups thereof.

[0029] In view of the entire contents of this disclosure, those skilled in the art will understand that each suitable feature of the various embodiments of this disclosure may be combined in part or in whole or in combination with each other, and may be technically interlocked and operated in various suitable ways, and each embodiment may be implemented independently of each other or in combination with each other in any suitable way, unless otherwise stated or implied.

[0030] Furthermore, any numerical range disclosed and / or described herein is intended to include all subranges containing the same numerical precision within the described range. For example, the range “1.0 to 10.0” is intended to include all subranges between (and including) the minimum value of 1.0 and the maximum value of 10.0, that is, all subranges having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly describe any subranges contained within the range expressly described herein.

[0031] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will be further understood that terms (such as those defined in general dictionaries) shall be interpreted as having the same meaning as they have in the context of the relevant field and / or the context of this specification, and shall not be interpreted as having an idealized or overly formal meaning unless expressly defined herein.

[0032] According to an embodiment of the present disclosure, a carrier frame for a battery pack for an electric vehicle includes: a frame comprising two pairs of opposing side beams; at least one crossbeam connecting the two opposing side beams; and a reinforcing beam fixed to the other two opposing side beams and the at least one crossbeam.

[0033] Reinforcing beams provide additional strength to the carrier frame. For example, the arrangement of reinforcing beams increases overall stiffness without reducing the volumetric energy density of the battery pack. Therefore, the resonant frequency of the carrier frame can also be adjusted to avoid vibrations at frequencies that could damage the battery pack to which it is mounted. In other words, the carrier frame design can extend its lifespan by shifting the resonant frequency that could damage the battery pack to other frequencies. Furthermore, reinforcing beams reduce the oscillating behavior of the battery pack and lower its natural frequency.

[0034] According to another embodiment, the reinforcing beam has a first through hole through which it is fixed to at least one crossbeam. The reinforcing beam and the crossbeam can be connected by a fixing element (e.g., a screw or bolt) passing through the first through hole, thereby providing a secure connection between the two components. Furthermore, resonant energy can be effectively transferred and dissipated, and the resonant frequency of the entire carrier frame can be adjusted.

[0035] According to another embodiment, the carrier frame further includes a base plate extending between at least one crossbeam and side beams, wherein the base plate is fixed to a reinforcing beam. The base plate can carry a battery or (correspondingly) a battery module. The base plate can cover the entire area between two pairs of opposing side beams. The base plate can be fixed to the crossbeam. The base plates can have different lengths. In some embodiments, the base plates can be connected to each other in a form-fit and / or force-fit manner.

[0036] According to another embodiment, the base plate has a structural element on the side facing the reinforcing beam, which protrudes from the plane of the base plate and abuts against the reinforcing beam. The structural element can provide stiffness to the base plate. Stiffness can involve bending stiffness and / or torsional stiffness. By abutting against the reinforcing beam, the overall stiffness of the carrier frame is further increased, thereby further altering the resonant frequency.

[0037] According to another embodiment, the reinforcing beam has a second through-hole in a region of the structural element not facing the base plate, and includes a bushing attached to the second through-hole and extending to the base plate. The reinforcing beam can be secured to the base plate via the bushing. Securing the base plate to the reinforcing beam further strengthens the carrier frame. The bushing can be secured to the reinforcing beam in a form-fit, force-fit, and / or material-joint manner.

[0038] According to another embodiment, the structural element has a U-shaped profile on the side facing the reinforcing beam, wherein the U-shaped profile extends transversely to the reinforcing beam. The U-shaped profile is another option for reinforcing the base plate. The U-shape has the advantage of being easily manufactured by bending the edges of the sheet metal and arranging them adjacent to each other, thereby creating a flat surface on one side of the base plate and several U-shapes arranged adjacent to each other on the other side of the base plate.

[0039] According to another embodiment, the reinforcing beam has a hollow profile. Compared to a solid beam, the hollow profile provides high stiffness while maintaining low weight, whereas a solid beam can have similar stiffness but is much heavier. Low weight is a significant advantage for electric vehicles.

[0040] According to another embodiment, the hollow profile includes at least two hollow chambers. When an opening exists in one hollow chamber, that location is weakened. However, a second hollow chamber without an opening can provide rigid support to compensate for this weakened area.

[0041] According to another embodiment, the reinforcing beam also includes a wall between adjacent hollow chambers in at least two hollow chambers. Because of this wall, even if one hollow chamber has an opening, the other chamber maintains a square, unobstructed profile, thereby maintaining the rigidity of the reinforcing beam.

[0042] In another embodiment, the reinforcing beam is made of aluminum. Aluminum is lightweight and suitable for electric vehicle applications.

[0043] According to another embodiment, the battery pack of the electric vehicle includes the carrier frame as described above.

[0044] Electric vehicles may include a battery pack. Electric vehicles may also include a lower protective cover, and a reinforcing beam may be arranged between the lower protective cover and the base plate. When a lower protective cover is present, a space (or gap) can be formed between the carrier frame and the lower protective cover. The reinforcing beam can fill the gap corresponding to this space and reinforce the carrier frame without increasing the gap. That is, no additional space is required to install the reinforcing beam.

[0045] According to another embodiment, the resonant frequency of the battery pack is in the range of approximately 45 Hz to approximately 49 Hz. In some embodiments, the resonant frequency is in the range of approximately 45 Hz to approximately 48 Hz. In some embodiments, the resonant frequency is in the range of approximately 45.5 Hz to approximately 47 Hz. These frequency ranges are not commonly achieved in electric vehicles, thereby avoiding amplified vibrations and reducing the burden on the battery pack during its lifespan, thus reducing the burden on the electric vehicle during its lifespan and extending its lifespan.

[0046] Figure 1 This is a schematic perspective view of the bottom of the carrier frame 100 according to an embodiment. The carrier frame 100 may be part of a battery pack and may accommodate individual battery cells.

[0047] The carrier frame 100 includes a frame 10, which includes two pairs of opposing side beams 12A, 12B, 14A, and 14B. The first pair of side beams includes a first side beam 12A extending along the longitudinal direction of the carrier frame 100. The longitudinal direction of the carrier frame 100 is the direction in which the carrier frame 100 has its maximum extension (or maximum dimension). Figure 1 In this context, the direction is indicated by the X-axis. The first pair of side beams also includes a second side beam 12B extending parallel to the first side beam 12A. The second pair of side beams includes another first side beam 14A extending in a direction perpendicular to the longitudinal direction (which may be referred to as the width direction of the carrier frame 100). Figure 1 In this context, the direction is indicated by the Y-axis. Another second side beam 14B in the second pair of side beams extends parallel to another first side beam 14A. According to the illustrated embodiment, the carrier frame 100 also includes a first angled beam 16A and a second angled beam 16B that respectively connect the first side beam 12A and the second side beam 12B to the other second side beam 14B.

[0048] The carrier frame 100 also includes at least one crossbeam 20A, 20B connecting two opposing side beams 12A, 12B of the carrier frame 100. In the illustrated embodiment, the first crossbeam 20A and the second crossbeam 20B are shown extending between the first side beam 12A and the second side beam 12B. The crossbeams 20A, 20B are fixed to the two opposing side beams 12A, 12B.

[0049] The carrier frame 100 also includes two additional opposing side beams 14A and 14B fixed to the frame 10 and reinforcing beams 20A and 20B. The reinforcing beam 50 has a first through-hole (e.g., a first opening) 52 through which it is fixed to the crossbeams 20A and 20B. In the illustrated embodiment, the reinforcing beam 50 is shown having two first through-holes 52 corresponding to the first crossbeam 20A and two first through-holes 52 corresponding to the second crossbeam 20B, but this disclosure is not limited thereto. For example, in other embodiments, the reinforcing beam 50 may have one, three, four, or more first through-holes corresponding to a crossbeam.

[0050] In the illustrated embodiment, the carrier frame 100 includes a base plate 30 extending between at least one crossbeam 20A, 20B and side beams 12A, 12B, 14A, 14B. The base plate 30 is fixed to a reinforcing beam 50. Furthermore, the base plate 30 includes a structural element 32 on the side facing the reinforcing beam 50, which protrudes from the plane of the base plate 30 and abuts (e.g., contacts) the reinforcing beam 50. In the illustrated embodiment, the structural element 32 is implemented in a U-shape on the side of the base plate 30 facing the reinforcing beam 50, wherein the U-shape extends transversely to the reinforcing beam 50.

[0051] In the illustrated embodiment, the reinforcing beam 50 also includes a second through-hole (e.g., a second opening) 54 in a region of the structural element 32 not facing the base plate 30, and a bushing 56 attached to the second through-hole 54 and extending to the base plate 30 (see, for example...). Figures 3 to 5 For example, bushing 56 fills the distance (or gap) between reinforcing beam 50 and base plate 30, thereby providing a secure connection. That is, reinforcing beam 50 can be secured to base plate 30 via bushing 56.

[0052] Figure 2 It is based on Figure 1 A schematic perspective view of the reinforcing beam 50 of the embodiment shown. (See above references) Figure 1 The provided explanation applies accordingly. The reinforcing beam 50 has two distal ends, namely the first end 64 and the second end 66. Figure 2 The lower surface 62 of the reinforcing beam 50 is shown. When the reinforcing beam 50 is mounted on the carrier frame 100, the lower surface 62 will face away from the carrier frame 100. The lower surface 62 of the reinforcing beam 50 can be flat, that is, without any protrusions extending beyond its surface.

[0053] For reference Figure 4 To explain in more detail, the reinforcing beam 50 may have a hollow profile. Therefore, the first through hole 52 may pass through the upper surface 60 of the reinforcing beam 50 (see example...). Figure 3 The upper surface 60 and the lower surface 62 are connected to form an upper first through hole through the upper surface 60 and a lower first through hole through the lower surface 62. In the same manner, a second through hole 54 can pass through the upper surface 60 and the lower surface 62 of the reinforcing beam 50, thereby forming an upper second through hole through the upper surface 60 and a lower second through hole through the lower surface 62.

[0054] A bushing 56 (which is hollow at its center (e.g., bushing 56 has a hollow center)) passes through and is secured thereto in the upper second through-hole. For example, the hollow center of bushing 56 extends from the upper surface 60 to the peripheral end of bushing 56 opposite to the upper surface 60. The bushing 56 can be secured by a form-fit, force-fit, and / or material-bonded method. In the illustrated embodiment, bushing 56 is secured by a form-fit by inserting it through the lower second through-hole from the lower surface 62 side. Therefore, the lower second through-hole can be larger than the upper second through-hole.

[0055] In the illustrated embodiment, the bushings 56 are arranged in pairs. Furthermore, the paired bushings 56 are arranged alternately and spaced apart from the center of the reinforcing beam 50. This arrangement facilitates increased rigidity and resonant frequency tuning. However, the bushings 56 may also be arranged in groups of three or more. In some embodiments, the bushings 56 may be arranged in a line. This line may be at the center of the reinforcing beam 50, or at a distance from the center of the reinforcing beam 50 (e.g., off-center).

[0056] Return to reference Figure 1 The reinforcing beam 50 may not be connected to all the base plates 30, which also reduces the propagation of vibrations at certain frequencies, thereby suppressing vibrations at these frequencies.

[0057] Figure 3 It is based on Figure 2 The embodiment shown is a schematic perspective view of a reinforcing beam 50 that is rotated 180° along the first end 64. Regarding... Figure 1 and Figure 2 The explanation applies accordingly. (See reference) Figure 3 The bushing 56 extends vertically from the upper surface 60 of the reinforcing beam 50. The height of the bushing 56 may depend on the height of the structural element 32 of the base plate 30. For example, the bushing 56 may be configured to allow a robust connection to be established between the reinforcing beam 50 and the base plate 30. The reinforcing beam 50 may have a third through hole (e.g., a third opening) 68 for fixing to the side beams 14A, 14B.

[0058] According to the implementation method, the width of the reinforcing beam 50 can be greater than 1 / 30 of the width of the carrier frame 100 (where width refers to...). Figure 1 (Extension in the Y direction). By adjusting (or changing) the width of the reinforcing beam 50 relative to the total width of the carrier frame 100, the stiffness of the carrier frame 100 can be flexibly adjusted (e.g., adjusted for different types of battery packs). To further increase stiffness, the width of the reinforcing beam 50 can be greater than 1 / 20 of the width of the carrier frame 100. In other embodiments, the width of the reinforcing beam 50 can be greater than 1 / 10 of the width of the carrier frame 100. In one embodiment, the width of the reinforcing beam 50 can be selected such that the resonant frequency of the battery pack is equal to or greater than about 45 Hz.

[0059] Figure 4 It is along Figure 3 A schematic sectional view of the reinforcing beam 50, taken along line A-A'. (Regarding...) Figures 1 to 3 The explanation applies accordingly. Figure 4The cross-sectional view shows the hollow interior of the reinforcing beam 50. In some embodiments, the reinforcing beam 50 may include a wall 72. In such an embodiment, the wall 72 divides the hollow reinforcing beam 50 into two hollow chambers 58, each extending in the longitudinal direction of the reinforcing beam 50. Compared to a solid beam, the hollow chambers 58 allow for weight savings while maintaining high rigidity. Furthermore, by providing two hollow chambers 58, even if one chamber has a through-hole, the other chamber can still maintain rigidity in the same or corresponding area. Thus, the wall 72 provides greater rigidity to the reinforcing beam 50 with minimal additional material. The material used for the reinforcing beam 50 can be a metal, such as aluminum.

[0060] Figure 5 It is along Figure 3 A schematic sectional view of the reinforcing beam 50, taken along line B-B'. (Regarding...) Figures 1 to 4 The interpretation accordingly applies. However, Figure 5 Another embodiment is shown, in which the structural element 32 has a different shape than the previously described embodiment. That is, although Figure 1 The structural element 32 of the base plate 30 shown has a U-shaped shape. Figure 5 The structural element 32 of the base plate 30 shown has an X-shaped cross-section when including the base plate 30. For example, the lower leg of the X-shape is compressed, such that the resting surface of the leg on the upper surface 60 of the reinforcing beam 50 is expanded. The middle of the X-shape is hollow. In the cross-sectional view, the hollow portion can be star-shaped. The structural element 32 extends along the longitudinal direction of the base plate 30. For example, the longitudinal direction of the base plate 30 is perpendicular to the longitudinal direction of the reinforcing beam 50. The structural element 32 can be formed such that when the two base plates 30 are arranged adjacent to each other, the bushing 56 engages between the two structural elements 32. When the reinforcing beam 50 is fixed to the base plate 30, the fixing element 70 (such as a screw or bolt) is inserted into the fixing structure 74 through the second through hole 54 (i.e., the lower second through hole and the upper second through hole).

[0061] In addition to the aforementioned carrier frame 100 and the accompanying battery therein, the battery pack 200 typically includes a monitoring and control unit, a temperature control unit, etc. Figure 6 A schematic diagram of an electric vehicle 300 including a battery pack 200 is shown. The electric vehicle 300 may include a lower protective cover 40. A reinforcing beam 50 may be arranged between the lower protective cover 40 and the base plate 30, which ensures that the space between the base plate 30 and the lower protective cover 40 is effectively used by the reinforcing beam 50. That is, no additional space is required for the reinforcing beam 50. In other words, the shape of the reinforcing beam 50 can be selected so that no additional space is required under the carrier frame 100.

[0062] Description of some figure labels

[0063] 10 frames

[0064] 12A First Side Beam

[0065] 12B Second Side Beam

[0066] 14A Another first side beam

[0067] 14B Another second side beam

[0068] 16A First Angle Beam

[0069] 16B Second Angle Beam

[0070] 20A First Crossbeam

[0071] 20B Second Crossbeam

[0072] 30 base plate

[0073] 32 Structural Components

[0074] 40 Lower protective cover

[0075] 50 Reinforced Beam

[0076] 52 First through hole

[0077] 54 Second through hole

[0078] 56 Bushing

[0079] 58 Hollow Chamber

[0080] 60 Top surface

[0081] 62 Lower surface

[0082] 64 First End

[0083] 66 Second End

[0084] 68 Third through hole

[0085] 70 Fixed components

[0086] 72 wall

[0087] 74 Fixed Structure

[0088] 100 Carrier Frame

[0089] 200 battery pack

[0090] 300 electric vehicles

Claims

1. A carrier frame for a battery pack, the carrier frame comprising: The frame includes two pairs of opposing side beams; A crossbeam, connecting the first pair of opposing side beams of the frame; as well as A reinforcing beam is fixed to the second pair of opposite side beams of the frame and to the crossbeam.

2. The carrier frame according to claim 1, wherein the reinforcing beam has a first through hole for fixing the reinforcing beam to the crossbeam.

3. The carrier frame according to claim 2 further includes a base plate extending between the crossbeam and the side beam, the base plate being fixed to the reinforcing beam.

4. The carrier frame according to claim 3, wherein the base plate has a structural element on the side facing the reinforcing beam, the structural element protruding from the plane of the base plate and abutting against the reinforcing beam.

5. The carrier frame of claim 4, wherein the reinforcing beam has a second through-hole in a region of the structural element not facing the base plate, and includes a bushing attached to the second through-hole and extending into the base plate, and The reinforcing beam is fixed to the base plate via the bushing.

6. The carrier frame according to claim 4, wherein the structural element has a U-shaped profile on the side facing the reinforcing beam, the U-shaped profile extending transversely to the reinforcing beam.

7. The carrier frame according to claim 1, wherein the reinforcing beam has a hollow profile.

8. The carrier frame according to claim 7, wherein the hollow profile has a plurality of hollow chambers.

9. The carrier frame according to claim 8, wherein the reinforcing beam comprises a wall between adjacent hollow chambers in the plurality of hollow chambers.

10. The carrier frame according to claim 1, wherein the reinforcing beam comprises aluminum.

11. A battery pack comprising a carrier frame according to any one of claims 1 to 10.

12. An electric vehicle comprising a battery pack according to claim 11.

13. The electric vehicle according to claim 12, further comprising a lower protective cover, The battery pack further includes a base plate extending between the crossbeam and the side beam, the base plate being fixed to the reinforcing beam, and The reinforcing beam is located between the lower protective cover and the base plate.

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