CN218896722U - Rebound device for battery pack box and battery pack with same - Google Patents

Rebound device for battery pack box and battery pack with same Download PDF

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Publication number
CN218896722U
CN218896722U CN202223149160.1U CN202223149160U CN218896722U CN 218896722 U CN218896722 U CN 218896722U CN 202223149160 U CN202223149160 U CN 202223149160U CN 218896722 U CN218896722 U CN 218896722U
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China
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battery pack
sheet
rebound
sheet body
piece
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CN202223149160.1U
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Inventor
成传胜
赵亮
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model discloses a rebound device for battery pack box loading and a battery pack with the rebound device. The rebound device comprises a rebound piece, wherein the rebound piece comprises a first piece body and a second piece body, the first end of the first piece body is connected with the first end of the second piece body, the second end of the first piece body is opposite to the second end of the second piece body, the first piece body is closer to the battery pack than the second piece body, the second piece body is configured to be a non-planar piece body, and the rebound piece is configured to enable the second end of the first piece body to be close to the second end of the second piece body when external force is applied, and the rebound piece can restore to an original shape after the external force is removed. According to the rebound device for the battery pack box, the rebound device has the advantages of higher structural strength, simple and compact structure, light weight and low cost, is convenient for assembling and disassembling the battery pack, and can greatly shorten the performance verification period of the battery pack.

Description

Rebound device for battery pack box and battery pack with same
Technical Field
The utility model relates to the field of battery pack assembly, in particular to a rebound device for battery pack box loading and a battery pack with the rebound device.
Background
With the concern about the safety performance of battery packs, the safety performance of battery packs is becoming increasingly important. In the running process of the electric vehicle, various complex working conditions can be met, and disassembly and maintenance of the battery pack also occur frequently. In the prior art, the tooling for putting the battery pack module into the box is very lack, the designed tooling structure is unreasonable, stress analysis is not performed, the situation that reworking and even scrapping occur due to insufficient rigidity and strength of the tooling for putting the battery pack module into the box is caused, the integral development node of a project is seriously affected, and the tooling is not suitable for disassembling operation of a large battery pack.
Disclosure of Invention
In view of the foregoing, the present utility model is directed to a rebound device for battery pack in-box assembly to improve the structural strength of the battery pack in-box assembly.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
a rebound device for battery pack entry comprising: the rebound piece comprises a first piece body and a second piece body, wherein the first end of the first piece body is connected with the first end of the second piece body, the second end of the first piece body is opposite to the second end of the second piece body, the first piece body is closer to the battery pack than the second piece body, the second piece body is configured to be a non-planar piece body, and the rebound piece is configured to enable the second end of the first piece body to be close to the second end of the second piece body when external force is applied, and to restore to an original shape after the external force is removed.
According to some embodiments of the utility model, the non-planar sheet comprises a wave-shaped sheet, and the wave-shaped sheet comprises a plurality of connected wave-shaped cells.
According to some embodiments of the utility model, the wave-shaped sheet has a wave-shaped surface with a vertical distance between the peaks and the valleys of the wave-shaped surface of 1/3 to 1 times the thickness of the rebound sheet.
According to some embodiments of the utility model, the lateral distance between two adjacent valleys of the undulating surface is 1/12 to 1/7 of the total lateral length of the plurality of connected undulating units.
According to some embodiments of the utility model, each of the wave-shaped units extends from a first end of the second sheet to a second end of the second sheet.
According to some embodiments of the utility model, the angle between the first sheet and the second sheet is 30 ° to 45 °.
According to some embodiments of the utility model, the resilient sheet is a spring steel sheet.
According to some embodiments of the utility model, the resilient device further comprises an end plate, the first blade is fixed to the end plate, and the second blade is located on a side of the first blade facing away from the end plate.
According to some embodiments of the utility model, the end plate is provided with a plurality of sheet positioning parts, the plurality of sheet positioning parts are arranged along the length direction of the end plate, and each sheet positioning part is fixedly provided with one return spring piece.
Compared with the prior art, the rebound device for battery pack box loading has the following advantages:
the rebound device for the battery pack box is characterized in that the rebound piece is configured to enable the second end of the first piece body to be close to the second end of the second piece body when external force is applied, and the rebound piece can be restored after the external force is removed.
Another object of the present utility model is to provide a battery pack including a battery pack; the box body comprises a box body bottom wall and a box body side wall, wherein a battery space is surrounded by the box body side wall, and the box body bottom wall is positioned at one end of the battery space; the rebound device is located between the end part of the battery pack and the corresponding side wall of the box body, the connecting end of the first sheet body and the connecting end of the second sheet body are close to the bottom wall of the box body, the separating end of the first sheet body and the separating end of the second sheet body are away from the bottom wall of the box body, and the rebound sheet is used for applying elastic force to the battery pack to enable the battery pack to be away from the corresponding side wall of the box body.
Compared with the prior art, the battery pack provided by the utility model has the following advantages:
according to the battery pack, the rebound device is positioned between the end part of the battery pack and the corresponding side wall of the box body, the connecting end of the first sheet body and the second sheet body is close to the bottom wall of the box body, the separating end of the first sheet body and the separating end of the second sheet body are far away from the bottom wall of the box body, the rebound piece is used for applying elastic force to the battery pack to enable the battery pack to be far away from the corresponding side wall of the box body, the structural strength of the battery pack box-entering tool is high, the disassembly operation of the battery pack is convenient, the cost is low, the manufacturing process is simple, and the performance verification period of the battery pack can be greatly shortened. Meanwhile, the rebound device can be used for box-in assembly work of the battery pack module, and also provides thought and reference for design of similar battery pack tools.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of a resilient sheet according to an embodiment of the present utility model;
FIG. 2 isbase:Sub>A cross-sectional view taken along the direction A-A of FIG. 1;
FIG. 3 is a side view of a return spring according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a rebound device for battery pack loading in a case according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a battery pack and rebound apparatus according to an embodiment of the present utility model;
fig. 6 is a schematic view of a battery pack according to an embodiment of the present utility model.
Reference numerals illustrate: the battery pack 1000, the rebound device 100, the rebound sheet 10, the first sheet 11, the second sheet 12, the first end 13a of the first sheet, the first end 13b of the second sheet, the second end 14a of the first sheet, the second end 14b of the second sheet, the wave unit 15, the end plate 16, the sheet positioning portion 17, the battery pack 200, the case 300, and the side wall 301.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The present utility model will be described in detail below with reference to fig. 1 to 6 in conjunction with the embodiments.
Referring to fig. 1 to 5, a rebound device 100 for a battery pack 200 into a case according to an embodiment of the present utility model may include a rebound piece 10. The rebound piece 10 includes a first piece 11 and a second piece 12, a first end 13a of the first piece 11 is connected to a first end 13b of the second piece 12, and a second end 14a of the first piece 11 is opposite to a second end 14b of the second piece 12. Alternatively, the resilient sheet 10 is generally U-shaped or V-shaped. When the return spring 10 is used for the battery pack 200 to be put in a box, the first sheet 11 is close to the battery pack 200, and the second sheet 12 is far from the battery pack 200, in other words, the first sheet 11 is closer to the battery pack 200 than the second sheet 12.
The second sheet 12 is configured as a non-planar sheet, and optionally, the surface of the second sheet 12 is provided with one or more protruding structures, which can increase the resilience of the resilient sheet 10 itself. The resilient piece 10 is configured to bring the second end 14a of the first sheet 11 close to the second end 14b of the second sheet 12 when an external force is applied, and to return to its original shape when the external force is removed. As shown in fig. 5, when the battery pack 200 is put into the box, the resilient sheet 10 is deformed by being pressed by an external force, and the second end 14a of the first sheet 11 is close to the second end 14b of the second sheet 12, so that after the battery pack 200 is put into the box, the battery pack 200 and the box 300 are elastically connected by the resilient sheet 10, so as to form the battery pack 1000. When the external force is removed, for example, after the rebound piece 10 is taken out from between the battery pack 200 and the case 300 or when the rebound piece 10 is not installed between the battery pack 200 and the case 300, the second end 14a of the first sheet body 11 is separated from the second end 14b of the second sheet body 12, the rebound piece 10 is restored to the original shape, and the rebound piece 10 can be reused, which is beneficial to saving the cost.
The rebound device 100 for battery pack loading in the case of the present utility model, the rebound piece 10 is configured to enable the second end 14a of the first sheet 11 to approach the second end 14b of the second sheet 12 when external force is applied, and to restore the original shape after the external force is removed, the rebound device 100 has a high structural strength, a simple and compact structure, a light weight, and a low cost, and is convenient for the assembly and disassembly operations of the battery pack 1000, and can greatly shorten the performance verification period of the battery pack 1000. When the battery pack 200 is put into the case, the rebound apparatus 100 can apply a rebound force to the battery pack 200, making the battery pack 200 compact.
Referring to fig. 2, in some embodiments of the present utility model, the non-planar sheet comprises a wave-shaped sheet, and the wave-shaped sheet comprises a plurality of connected wave-shaped units 15. As shown in fig. 2, the non-planar sheet body includes a plurality of connected wave units 15, which can further enhance the rebound rigidity of the return spring 10. In some embodiments not shown in the figures, the number of wave units 15 may also be one.
Referring to fig. 1-2, in some embodiments of the utility model, the undulating sheet body has an undulating surface with a vertical distance between peaks and troughs of the undulating surface that is 1/3 to 1 times the thickness of the rebound sheet 10. The thickness of the return spring 10 is H 1 As shown in FIG. 2, the vertical distance between the wave crest and the wave trough is H 2 Optionally H 2 /H 1 The ratio of (2) can be 1/3, 1/2, 1, of course H 2 /H 1 The ratio of (2) may be other values between 1/3 and 1, not specifically recited herein. H 2 /H 1 The smaller the ratio of the wavy sheet, the more gentle the wavy sheet and the smaller the rebound force. H 2 /H 1 The larger the ratio of the wavy sheet, the more pronounced the wavy relief and the greater the resilience.
Referring to fig. 1-2, in some embodiments of the utility model, the lateral distance between adjacent valleys of the undulating surface is 1/12 to 1/7 of the total lateral length of the plurality of connected undulating elements 15. As shown in FIG. 2, the lateral distance between two adjacent valleys is H 3 The plurality of connected wave units 15 have a total transverse length H 4 ，H 3 /H 4 The ratio of (C) may be 1/12, 1/11, 1/10, 1/9, 1/8, 1/7, of course H 3 /H 4 The ratio of (2) may be other values from 1/12 to 1/7. In other words, the number of the wavy elements 15 is 7 to 12. H 3 /H 4 The smaller the ratio of the wave units 15, the more resilient the rebound device 100.
Referring to fig. 1-3, in some embodiments of the utility model, each wave unit 15 extends from a first end 13b of the second sheet 12 to a second end 14b of the second sheet 12. As shown in fig. 1, the extending direction of the length of the wave unit 15 is parallel to the direction from the first end 13b to the second end 14b, and the wave unit 15 is distributed over the whole second sheet 12, so as to further improve the resilience performance of the second sheet 12. In some embodiments, not shown, the length of the wave-shaped elements 15 extends perpendicular to the direction from the first end 13b to the second end 14b, and the wave-shaped elements 15 extend over the entire second sheet 12. Alternatively, the length of the wave-shaped units 15 may extend at an acute or obtuse angle to the direction from the first end 13b to the second end 14b, for example, the wave-shaped units 15 may be arranged diagonally to the second sheet 12.
In some embodiments not shown in the figures, the non-planar sheet comprises a fold-line sheet, and the fold-line sheet comprises a plurality of connected fold-line units.
Referring to fig. 3, in some embodiments of the present utility model, the angle between the first sheet 11 and the second sheet 12 is 30 ° to 45 °. Alternatively, as shown in fig. 3, the angle between the first sheet 11 and the second sheet 12 is α, where α is 30 °, 35 °, 40 °, 45 °, and of course, α may be other values between 30 ° and 45 °. When the included angle between the first sheet body 11 and the second sheet body 12 is 30-45 degrees, the rebound resilience performance of the rebound sheet 10 is good, when the rebound sheet is extruded by external force, the rebound sheet can deform and shrink, when the external force is removed, the rebound sheet can recover the original shape, and the rebound sheet 10 occupies small volume and has light weight.
In some embodiments of the present utility model, the return spring 10 is a spring steel sheet, i.e. a sheet-like structure made of spring steel. The spring steel sheet has good elastic performance, and the rebound performance of the rebound piece 10 can be further improved.
Referring to fig. 4, in some embodiments of the present utility model, rebound device 100 may further comprise an end plate 16, wherein first sheet 11 is fixed to end plate 16 and second sheet 12 is located at a side of first sheet 11 facing away from end plate 16. Alternatively, the first sheet 11 may be secured to the end plate 16 by bonding, welding, or the like, and the second sheet 12 facing away from the end plate 16 for providing a resilient force. Alternatively, the connection part of the first sheet 11 and the second sheet 12 is welded reversely to form a whole, so that the connection strength of the first sheet 11 and the second sheet 12 can be improved, and the rebound performance of the rebound piece 10 is ensured.
Referring to fig. 4-5, in some embodiments of the present utility model, a plurality of sheet positioning portions 17 are provided on the end plate 16, the plurality of sheet positioning portions 17 are arranged along the length direction of the end plate 16, and a rebound sheet 10 is fixedly provided at each sheet positioning portion 17. Alternatively, as shown in fig. 5, the sheet positioning portion 17 is a groove, and the rebound piece 10 is installed in the groove to prevent the rebound piece 10 from interfering with other structures. One, two, three and other sheet positioning parts 17 can be arranged on the end plate 16, one or more sheet positioning parts 17 correspond to one battery pack 200, and the plurality of sheet positioning parts 17 are arranged along the length direction of the end plate 16, so that the battery pack 1000 can be compact in structure, and the volume of the battery pack 1000 can be reduced. As shown in fig. 5, two battery packs 200 are arranged side by side, two grooves are formed in one end plate 16 at intervals, two rebound pieces 10 can be mounted on one end plate 16, and the two rebound pieces 10 are opposite to the two battery packs 200 respectively.
One specific embodiment of rebound apparatus 100 of the present utility model is provided below.
The rebound device 100 comprises a rebound piece 10 and an end plate 16, wherein the end plate 16 is provided with two sheet body positioning parts 17, and each sheet body positioning part 17 is provided with one rebound piece 10. The return spring 10 comprises a first sheet 11 and a second sheet 12, the first sheet 11 and the second sheet 12 are approximately U-shaped, a first end 13a of the first sheet 11 is connected with a first end 13b of the second sheet 12, the connection part of the first sheet 11 and the second sheet 12 is formed into a whole by reverse welding, a second end 14a of the first sheet 11 is opposite to a second end 14b of the second sheet 12, and an included angle between the first sheet 11 and the second sheet 12 is 30 degrees. The return spring plate 10 is a spring steel plate. When the battery pack 200 is put into the box, the end plate 16 is attached to the battery pack 200, the second sheet body 12 is attached to the box 300, the rebound sheet 10 is extruded and deformed by the extrusion force of the battery pack 200 and the box 300, the second end 14a of the first sheet body 11 is close to the second end 14b of the second sheet body 12, the battery pack 200 and the box 300 are elastically connected through the rebound device 100, after the rebound device 100 is withdrawn from between the battery pack 200 and the box 300, the extrusion force of the battery pack 200 and the box 300 to the rebound sheet 10 is removed, the second end 14a of the first sheet body 11 is separated from the second end 14b of the second sheet body 12, and the rebound sheet 10 is restored.
The second sheet 12 is a wave-shaped sheet and the wave-shaped sheet comprises a plurality of connected wave-shaped units 15, each wave-shaped unit 15 extending from a first end 13b of the second sheet 12 to a second end 14b of the second sheet 12. The wave-shaped sheet body has a wave-shaped surface, and the vertical distance between the wave crest and the wave trough of the wave-shaped surface is 1/3 times of the thickness of the rebound sheet 10. The lateral distance between adjacent two valleys of the undulating surface is 1/8 of the total lateral length of the plurality of connected undulating elements 15.
The first sheet 11 of the return spring 10 is adhered to the sheet positioning portion 17 of the end plate 16, and the second sheet 12 is located on a side of the first sheet 11 facing away from the end plate 16. The sheet positioning portion 17 is a groove, two grooves are formed in one end plate 16, two rebound sheets 10 can be installed on the two rebound sheets 10, and the two rebound sheets 10 are opposite to the two battery packs 200 respectively. When the second sheet 12 is displaced by 2mm, the basic resilience force of one resilience piece 10 can be raised to 3955N, the resetting requirement of one battery pack 200 after the 4000N battery packs 200 are put into the box is met, the structure of fixing two resilience pieces 10 on one end plate 16 can meet the design requirement of two battery packs 200, the resilience force is 8000N, and the assembly quality of the battery pack 1000 is further ensured. The resilience of the lifting return spring 10 is mainly expressed in the following four aspects: (1) The return spring plate 10 is made of spring steel, and the spring steel has good rebound resilience; (2) The first sheet 11 and the second sheet 12 of the elastic return sheet 10 are connected into a U shape, so that preliminary elastic return force is ensured; (3) The second sheet body 12 of the elastic return sheet 10 is a wavy sheet body, and each wavy unit 15 penetrates from the first end 13b of the second sheet body 12 to the second end 14b of the second sheet body 12, so that further elastic return force is ensured; (4) The connection part of the first sheet body 11 and the second sheet body 12 of the return spring sheet 10 is formed by reversely welding the sheet bodies into a whole, so that the final required return spring force is ensured, and the assembly quality of the battery pack 200 after being put into a box is further ensured.
Referring to fig. 6, a battery pack 1000 according to another embodiment of the present utility model may include a battery pack 200, a case 300, and the rebound apparatus 100 of the above-described embodiment. The case 300 includes a case bottom wall and a case side wall 301, the case side wall 301 surrounds a battery space, and the case bottom wall is located at one end of the battery space. The rebound device 100 is located between an end of the battery pack 200 and a corresponding case side wall 301, a connection end of the first sheet 11 and the second sheet 12 is close to the case bottom wall, a separation end of the first sheet 11 and the second sheet 12 is far away from the case bottom wall, and the rebound sheet 10 is used for applying an elastic force to the battery pack 200 to keep the battery pack 200 away from the corresponding case side wall 301. The rebound device 100 has high structural strength, simple and compact structure, light weight and low cost, is convenient for the disassembly operation of the battery pack 1000, and can greatly shorten the performance verification period of the battery pack 1000. Meanwhile, the rebound device 100 can be used for box-in assembly work of the battery pack 1000 battery pack 200, and also provides thought and reference for the design of similar battery pack 1000 tools. As shown in fig. 1-3, the connecting end of the first sheet 11 and the second sheet 12 is downward, and the separating end of the first sheet 11 and the second sheet 12 is upward, so that the rebound device 100 is conveniently installed in the box 300, and the rebound performance of the rebound piece 10 is improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A rebound device (100) for battery pack entry, comprising:
the elastic return piece (10), the elastic return piece (10) comprises a first sheet body (11) and a second sheet body (12), a first end (13 a) of the first sheet body (11) is connected with a first end (13 b) of the second sheet body (12), a second end (14 a) of the first sheet body (11) is opposite to a second end (14 b) of the second sheet body (12), the first sheet body (11) is closer to the battery pack (200) than the second sheet body (12), the second sheet body (12) is configured to be a non-planar sheet body, and the elastic return piece (10) is configured to enable the second end (14 a) of the first sheet body (11) to be close to the second end (14 b) of the second sheet body (12) when an external force is applied and to recover the original shape after the external force is removed.
2. The rebound device (100) for battery pack loading according to claim 1, wherein the non-planar sheet comprises a wave-shaped sheet and the wave-shaped sheet comprises a plurality of connected wave-shaped cells (15).
3. The rebound device (100) for battery pack loading according to claim 2, wherein the wave-shaped sheet body has a wave-shaped surface, and a vertical distance between a peak and a trough of the wave-shaped surface is 1/3 to 1 times a thickness of the rebound piece (10).
4. A rebound device (100) for battery pack loading as claimed in claim 3, wherein the lateral distance between adjacent two valleys of the undulating surface is 1/12 to 1/7 of the total lateral length of the plurality of connected undulating units (15).
5. Rebound device (100) for battery pack loading according to claim 2, characterized in that each wave-shaped unit (15) penetrates from a first end (13 b) of the second sheet body (12) to a second end (14 b) of the second sheet body (12).
6. Rebound device (100) for battery pack loading according to claim 1, characterized in that the angle between the first sheet body (11) and the second sheet body (12) is 30 ° to 45 °.
7. Rebound apparatus (100) for battery pack loading according to claim 1, wherein said rebound piece (10) is a spring steel sheet.
8. Rebound device (100) for battery pack loading according to any one of claims 1-7, characterised in that the rebound device (100) further comprises an end plate (16), the first blade (11) being fixed to the end plate (16), the second blade (12) being located on the side of the first blade (11) facing away from the end plate (16).
9. The rebound device (100) for battery pack loading into a box according to claim 8, wherein a plurality of sheet body positioning portions (17) are provided on the end plate (16), the plurality of sheet body positioning portions (17) are arranged along the length direction of the end plate (16), and one rebound piece (10) is fixedly provided at each sheet body positioning portion (17).
10. A battery pack (1000), comprising:
a battery pack (200);
the box body (300), the box body (300) comprises a box body bottom wall and a box body side wall (301), the box body side wall (301) surrounds a battery space, and the box body bottom wall is positioned at one end of the battery space;
the rebound device (100) of any one of claims 1-9, the rebound device (100) being located between an end of the battery pack (200) and the corresponding case side wall (301), a connection end of the first sheet body (11) and the second sheet body (12) being close to the case bottom wall, a separation end of the first sheet body (11) and the second sheet body (12) being distant from the case bottom wall, the rebound piece (10) being for applying an elastic force to the battery pack (200) that moves the battery pack (200) away from the corresponding case side wall (301).
CN202223149160.1U 2022-11-25 2022-11-25 Rebound device for battery pack box and battery pack with same Active CN218896722U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223149160.1U CN218896722U (en) 2022-11-25 2022-11-25 Rebound device for battery pack box and battery pack with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223149160.1U CN218896722U (en) 2022-11-25 2022-11-25 Rebound device for battery pack box and battery pack with same

Publications (1)

Publication Number Publication Date
CN218896722U true CN218896722U (en) 2023-04-21

Family

ID=85999681

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223149160.1U Active CN218896722U (en) 2022-11-25 2022-11-25 Rebound device for battery pack box and battery pack with same

Country Status (1)

Country Link
CN (1) CN218896722U (en)

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