A battery pack frame and a battery pack

Abstract

The utility model discloses a kind of battery pack frame and battery pack, for solving the technical problem that the deviation of existing battery pack frame is prone to exist when installing, thereby leading to the technical problem that battery pack frame is not installed stably.The battery pack frame of the utility model, including frame body, the frame body includes first side beam and second side beam oppositely arranged along X-axis direction, wherein, the first side beam and the second side beam are all along Y-axis direction extension;The first side beam and the second side beam are all provided with multiple mounting holes spaced along Y-axis direction;Any mounting hole on the first side beam is first reference hole, any mounting hole on the second side beam is second reference hole.

Description

Technical Field

[0001] This utility model relates to the field of battery design technology, and in particular to a battery pack frame and a battery pack. Background Technology

[0002] Currently, a battery pack generally includes a frame and a battery pack mounted on the frame. During the battery pack installation process, the frame is generally designed with multiple mounting holes to mate with the positioning posts at the bottom of the electric vehicle body, thereby realizing the installation of both.

[0003] Because of the machining error of the positioning posts at the bottom of the vehicle body, it can be simply understood that the dimensions of multiple positioning posts will have a certain dimensional deviation. Under the above circumstances, during the process of installing the frame into the electric vehicle, due to the dimensional deviation of the positioning posts, the frame will still be loose and unstable after being fixed.

[0004] Therefore, finding a technical solution that can solve the above-mentioned technical problems has become an important research topic for those skilled in the art. Utility Model Content

[0005] This utility model discloses a battery pack frame and a battery pack, which solves the technical problem that existing battery pack frames are prone to deviations during installation, resulting in unstable installation of the battery pack frame.

[0006] The present invention provides a battery pack frame, including a frame body, wherein the frame body includes a first side beam and a second side beam arranged opposite to each other along the X-axis direction, wherein the first side beam and the second side beam both extend along the Y-axis direction;

[0007] Both the first side beam and the second side beam are provided with a plurality of mounting holes spaced apart along the Y-axis direction;

[0008] Any mounting hole on the first side beam is a first reference hole, and any mounting hole on the second side beam is a second reference hole.

[0009] Optionally, along the Y-axis direction, both the first side beam and the second side beam have a first end and a second end that are disposed opposite to each other. The mounting hole at the first end of the first side beam is a first reference hole, and the mounting hole at the second end of the second side beam is a second reference hole.

[0010] Optionally, the first reference hole and the second reference hole are diagonally arranged, and the second reference hole is an elongated hole, with the length direction of the second reference hole on the same straight line as the center point of the first reference hole.

[0011] Optionally, the length direction of the second reference hole forms a preset tilt angle with the Y-axis direction.

[0012] Optionally, the angle α of the tilt angle is in the range of 30°≤a≤60°.

[0013] Optionally, the first side beam and / or the second side beam may be provided with a stepped cross section.

[0014] Optionally, the battery pack frame is used for mounting on a vehicle, and the negative direction of the Y-axis is defined as the vehicle's driving direction;

[0015] The first side beam and the second side beam are beams with internal cavities. The stepped cross-section includes a first surface facing the direction of vehicle travel and a second surface not facing the direction of vehicle travel. A through hole is provided on the first surface, and the through hole communicates with the cavity.

[0016] Optionally, the through holes on the first surface are coated with sealant to prevent the cavity corresponding to the first surface from communicating with the outside.

[0017] Optionally, the first surface includes an interconnected arc surface and a flat surface, and the distance by which the sealant extends into the cavity from the opening position of the through hole on the arc surface is greater than the distance by which the sealant extends into the cavity from the opening position of the through hole on the flat surface.

[0018] The present invention provides a battery pack, including the aforementioned battery pack frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this embodiment of the battery pack frame, the mounting holes on the first and second side beams are selected as the first and second reference holes. Through this design, when the battery pack frame is installed onto the bottom of the electric vehicle body, one reference hole is first positioned and engaged with a positioning post on the bottom of the body, and then the other reference hole is positioned and engaged with another positioning post on the bottom of the body. With this design, if there is a manufacturing error in the other positioning post of the body, one of the reference holes can absorb that manufacturing error, thereby ensuring the installation stability of the battery pack frame and the electric vehicle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a battery pack frame provided by the present invention;

[0023] Figure 2 A schematic diagram of the structure of the second reference hole of a battery pack frame provided by this utility model;

[0024] Figure 3 A schematic diagram of the stepped end face structure of a battery pack frame provided by this utility model;

[0025] Illustration: First side beam 1; Second side beam 2; Third side beam 3; Fourth side beam 4; Mounting hole 5; First reference hole 6; Second reference hole 7; Step section 8; First surface 801; Second surface 802; Sealant 9; First reinforcing beam 10; Second reinforcing beam 11. Detailed Implementation

[0026] This utility model discloses a battery pack frame and a battery pack, which solves the technical problem that existing battery pack frames are prone to deviation during installation, resulting in unstable installation of the battery pack frame.

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1 to 3 The present invention provides a battery pack frame, including a frame body, the frame body including a first side beam 1 and a second side beam 2 arranged opposite to each other along the X-axis direction, wherein the first side beam 1 and the second side beam 2 both extend along the Y-axis direction;

[0029] Both the first side beam 1 and the second side beam 2 are provided with a plurality of mounting holes 5 spaced apart along the Y-axis direction;

[0030] Any mounting hole 5 on the first side beam 1 is the first reference hole 6, and any mounting hole 5 on the second side beam 2 is the second reference hole 7.

[0031] In this embodiment of the battery pack frame, mounting holes 5 on the first side beam 1 and the second side beam 2 are selected as the first reference hole 6 and the second reference hole 7. Through this design, when the battery pack frame is installed onto the bottom of the electric vehicle body, one of the reference holes is first positioned and engaged with a positioning post on the bottom of the vehicle body, and then the other reference hole is positioned and engaged with another positioning post on the bottom of the vehicle body. With this design, if there is a manufacturing error in the other positioning post of the vehicle body, one of the reference holes can absorb the manufacturing error, thereby ensuring the installation stability of the battery pack frame and the electric vehicle.

[0032] Furthermore, to ensure installation accuracy and absorb manufacturing errors, in this embodiment, the distance between the two reference holes should be as long as possible. In one specific implementation, along the Y-axis, the first side beam 1 and the second side beam 2 each have a first end and a second end that are arranged opposite to each other. The mounting hole 5 at the first end of the first side beam 1 is the first reference hole 6, and the mounting hole 5 at the second end of the second side beam 2 is the second reference hole 7. At this time, the first reference hole 6 and the second reference hole 7 are diagonally arranged, and the distance between them is the largest, which achieves the best technical effect. This can ensure the installation accuracy between the battery pack frame and the electric vehicle and ensure that manufacturing errors are absorbed. This is the preferred implementation method in this embodiment.

[0033] Specifically, in the above-described embodiment, the first reference hole 6 is selected as the main reference hole, and the second reference hole 7 is selected as the auxiliary reference hole. In this embodiment, when the first reference hole 6 is the main reference hole, the diameter of the first reference hole 6 is 0.1~1mm smaller than the diameter of the other mounting holes 5.

[0034] Specifically, the main reference hole and the auxiliary reference hole are set diagonally, and the auxiliary reference hole is an elongated hole, with the length direction of the auxiliary reference hole on the same straight line as the center point of the main reference hole.

[0035] In the above specific embodiment, when the battery pack frame is installed on the bottom of the electric vehicle body, the main reference hole is first positioned and engaged with the positioning post on the bottom of the body, and then the auxiliary reference hole is positioned and engaged with another positioning post on the bottom of the body. With this design, when there is a manufacturing error in the other positioning post of the body, since the auxiliary reference hole is an elongated hole, it has a certain space for the positioning post to move. Therefore, the auxiliary reference hole can absorb the manufacturing error, thereby ensuring the installation stability of the battery pack frame and the electric vehicle.

[0036] Furthermore, in this embodiment, the length direction of the second reference hole 7 forms a preset tilt angle with the Y-axis direction.

[0037] The range of the angle 'a' of the aforementioned tilt angle is: 30°≤a≤60°.

[0038] It should be noted that in some specific embodiments, the aforementioned tilt angle is specifically 30°, 40°, 60°, etc., and this embodiment does not limit it in this way.

[0039] Furthermore, in this embodiment, the first side beam 1 and / or the second side beam 2 are provided with stepped cross sections 8.

[0040] It should be noted that the design of the stepped section 8 described above can help reduce the overall weight of the battery pack frame, thereby effectively improving the energy density of the battery pack.

[0041] In addition, this embodiment does not limit the number of step cross sections 8, and designers can choose according to design requirements.

[0042] Furthermore, the aforementioned first side beam 1 and / or second side beam 2 are obtained by mechanical cutting to obtain the aforementioned stepped cross-section 8.

[0043] Furthermore, in this embodiment, the battery pack frame is used for mounting on a vehicle, and the negative direction of the Y-axis is defined as the vehicle's driving direction, specifically... Figure 1 The direction indicated by the arrow on the Y-axis;

[0044] The first side beam 1 and the second side beam 2 are beams with internal cavities. The stepped cross-section 8 includes a first surface 801 facing the direction of vehicle travel and a second surface 802 not facing the direction of vehicle travel. The first surface 801 communicates with the cavity. The second surface 802 is connected to the first surface 801 and can be the wall surface of the beam forming the cavity. To increase the overall structural strength, the second surface 802 can be connected between the two first surfaces 801. Specifically, there can be multiple cavities, and multiple through holes (not labeled) communicating with the cavities can be formed on the first surface 801.

[0045] Furthermore, in this embodiment, the through-holes on the first surface 801 are coated with sealant 9 to prevent the cavity from communicating with the outside. The sealant 9 can fill the through-holes and spread a certain distance from the opening of the through-holes into the cavity to improve the sealing performance and prevent the sealant 9 from falling off.

[0046] Furthermore, the first surface 801 may include an interconnected arc surface and a flat surface. The arc surface can be connected to the frame body for easy processing. In this case, the through hole can correspond to both the arc surface and the flat surface, or one through hole can correspond to the arc surface and the other through hole can correspond to the flat surface. The distance that the sealant 9 extends into the cavity from the opening position of the through hole on the arc surface is greater than the distance that extends into the cavity from the opening position of the through hole on the flat surface, so as to ensure the sealing effect.

[0047] It should be noted that since the battery pack frame is exposed after being installed at the bottom of the vehicle, if the step section 8 is not protected, hard objects such as stones and gravel or liquids may enter the cavity of the first side beam 1 and / or the second side beam 2 of the battery pack during driving. The vehicle body will vibrate during driving, causing stones and other objects to shake inside the first side beam 1 and / or the second side beam 2, resulting in noise. If liquids are not drained for too long, corrosion may occur.

[0048] Therefore, in order to solve the above situation, this embodiment coats the through hole on the first surface 801 of the step section 8 with sealant 9 to seal the cavity and thus prevent external stones, gravel, liquids, etc. from entering the beam body of the first side beam 1 and / or the second side beam 2.

[0049] It should be noted that, since only the first surface 801 faces the direction of the car's movement during the car's operation, external stones, gravel, and liquids will only enter the cavity from the first surface 801, which is the same as the step cross-section 8. Based on the above, in this embodiment, sealant 9 can be applied only to the first surface 801 to prevent external stones, gravel, and liquids from entering the first side beam 1 and / or the second side beam 2, without having to apply sealant 9 to the other side opposite to the first surface 801, thus saving the amount of sealant 9 used.

[0050] Furthermore, the battery pack frame in this embodiment is specifically a quadrilateral structure, which, in addition to the first side beam 1 and the second side beam 2, also has a third side beam 3 and a fourth side beam 4. The first side beam 1, the second side beam 2, the third side beam 3 and the fourth side beam 4 are arranged to form the battery pack frame.

[0051] In addition, to enhance the mechanical strength of the battery pack frame, the battery pack frame also includes multiple first reinforcing beams 10 extending along the X-axis and multiple second reinforcing beams 11 extending along the Y-axis. The first reinforcing beams 10 are connected between the first side beam 1 and the second side beam 2, and the second reinforcing beams 11 are connected between the third side beam 3 and the fourth side beam 4.

[0052] Please see Figures 1 to 3 The present invention provides a battery pack, including the aforementioned battery pack frame.

[0053] The battery pack in this embodiment includes the aforementioned battery pack frame. Within this frame, mounting holes 5 on the first side beam 1 and the second side beam 2 are selected as the first reference hole 6 and the second reference hole 7. Through this design, when the battery pack frame is installed onto the bottom of the electric vehicle body, one reference hole is first positioned and engaged with a positioning post on the bottom of the vehicle body, and then the other reference hole is positioned and engaged with another positioning post on the bottom of the vehicle body. With this design, if there is a manufacturing error in the other positioning post of the vehicle body, one of the reference holes can absorb that manufacturing error, thereby ensuring the installation stability of the battery pack frame and the electric vehicle.

[0054] The above provides a detailed description of a battery pack frame and battery pack provided by this utility model. For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack frame, characterized in that, The frame body includes a first side beam (1) and a second side beam (2) arranged opposite to each other along the X-axis, wherein the first side beam (1) and the second side beam (2) both extend along the Y-axis. Both the first side beam (1) and the second side beam (2) are provided with a plurality of mounting holes (5) spaced apart along the Y-axis direction; Any mounting hole (5) on the first side beam (1) is a first reference hole (6), and any mounting hole (5) on the second side beam (2) is a second reference hole (7).

2. The battery pack frame according to claim 1, characterized in that, Along the Y-axis, the first side beam (1) and the second side beam (2) each have a first end and a second end that are arranged opposite to each other. The mounting hole (5) at the first end of the first side beam (1) is a first reference hole (6), and the mounting hole (5) at the second end of the second side beam (2) is a second reference hole (7).

3. The battery pack frame according to claim 2, characterized in that, The first reference hole (6) and the second reference hole (7) are diagonally arranged, and the second reference hole (7) is an elongated hole. The length direction of the second reference hole (7) is on the same straight line as the center point of the first reference hole (6).

4. The battery pack frame according to claim 3, characterized in that, The length direction of the second reference hole (7) forms a preset inclined angle with the Y-axis direction.

5. The battery pack frame according to claim 4, characterized in that, The range of the included angle α is: 30°≤a≤60°.

6. The battery pack frame according to claim 1, characterized in that, The first side beam (1) and / or the second side beam (2) are provided with stepped cross sections (8).

7. The battery pack frame according to claim 6, characterized in that, The battery pack frame is used for mounting on a vehicle, and the negative direction of the Y-axis is defined as the vehicle's driving direction; The first side beam (1) and the second side beam (2) are beams with cavities inside. The stepped cross section (8) includes a first surface (801) facing the direction of vehicle travel and a second surface (802) not facing the direction of vehicle travel. A through hole is provided on the first surface (801), and the through hole communicates with the cavity.

8. The battery pack frame according to claim 7, characterized in that, The through holes on the first surface (801) are coated with sealant (9) to prevent the cavity from communicating with the outside.

9. The battery pack frame according to claim 8, characterized in that, The first surface (801) includes an interconnected arc surface and a flat surface. The distance by which the sealant (9) extends into the cavity from the opening position of the through hole on the arc surface is greater than the distance by which the sealant (9) extends into the cavity from the opening position of the through hole on the flat surface.

10. A battery pack, characterized in that, Includes the battery pack frame as described in any one of claims 1 to 9.

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