CN215751869U - Structure for improving vibration noise of battery pack, battery pack and vehicle - Google Patents
Structure for improving vibration noise of battery pack, battery pack and vehicle Download PDFInfo
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- CN215751869U CN215751869U CN202121524926.2U CN202121524926U CN215751869U CN 215751869 U CN215751869 U CN 215751869U CN 202121524926 U CN202121524926 U CN 202121524926U CN 215751869 U CN215751869 U CN 215751869U
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- battery pack
- vibration noise
- spring
- upper cover
- improving vibration
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- 238000003466 welding Methods 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 description 10
- 241000208967 Polygala cruciata Species 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model discloses a structure for improving vibration noise of a battery pack, the battery pack and a vehicle, wherein the structure comprises a rigid support arranged in the middle of the battery pack and spring supports arranged on the periphery of the battery pack, the rigid support is welded with an upper cover of the battery pack, the spring supports are welded with the upper cover of the battery pack, the top of the rigid support is provided with a first welding screw, the top of each spring support is provided with a second welding screw, and the first welding screw and the second welding screw are used for being connected with a lower vehicle body of the vehicle, wherein a set pre-compression amount is arranged between the rigid support and the lower vehicle body to generate shock-stopping pre-compression force. According to the utility model, the rigid support arranged in the middle of the battery pack is combined with the spring supports on the periphery, so that the middle of the battery pack is strongly supported, and the effects of greatly improving and reducing noise are achieved.
Description
Technical Field
The utility model relates to the field of battery packs and electric automobiles, in particular to a structure for improving vibration noise of a battery pack, the battery pack with the structure and a vehicle.
Background
Fig. 1 to 3 show a typical structure of a battery pack for an electric vehicle, the battery pack 10 ' is composed of a base plate 11 ', an upper cover 12 ', and a battery module 13 ', and the peripheral edge of the battery pack has a connection point 14 ' which is connected to a lower body of an electric vehicle 20 ' by a screw 30 '.
During driving, as shown in fig. 4, the vibration of the battery pack generates noise, which is transmitted into the vehicle compartment, resulting in poor riding experience. Chinese patent document CN1482971A discloses a shock-absorbing scheme for a battery pack of an electric vehicle, in which shock-absorbing springs are arranged at four corners between a lower vehicle body and the battery pack to achieve a shock-absorbing effect.
The existing damping spring scheme reduces the noise of the battery pack to a certain extent, but still has distinguishable noise, and the ideal effect is not achieved, and in the implementation process of the damping spring scheme, the inventor finds that: this is not the reason why the choice or layout of the damping springs is not optimal in engineering, but there are other sources of noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a structure for improving vibration noise of a battery pack so as to improve the noise reduction effect of the battery pack in motion.
Another objective of the present invention is to provide a battery pack for improving vibration noise, so as to improve the noise reduction effect of the battery pack during movement.
The utility model also aims to provide a vehicle to improve the noise reduction effect of the battery pack in motion.
To this end, the utility model provides a structure for improving vibration noise of a battery pack, which is characterized by comprising a rigid support arranged in the middle of the battery pack and a plurality of spring supports arranged around the battery pack, wherein the rigid support is welded with an upper cover of the battery pack, each spring support is welded with the upper cover of the battery pack, the top of the rigid support is provided with a first welding screw, the top of each spring support is provided with a second welding screw, and the first welding screw and the second welding screw are used for being connected with a lower body of a vehicle, wherein a set pre-compression amount is arranged between the rigid support and the upper cover of the battery pack to generate a pre-compression force for shock stopping.
Further, the spring support comprises a bottom plate, a top plate and a damping spring which is positioned between the top plate and the bottom plate and welded with the top plate and the bottom plate.
Furthermore, stamping bosses are respectively arranged on the top plate and the bottom plate and used for welding and positioning the damping spring.
Further, the rigid support comprises a box-packed support body and welding foot plates symmetrically arranged on two sides of the box-packed support body.
Furthermore, the box-packed support body and the two welding foot plates are integrally formed sheet metal parts.
Furthermore, each bending part of the sheet metal part is provided with a stamping concave structure.
Further, the pre-compaction amount is 8mm to 12 mm.
Further, the spring support and the battery pack upper cover are welded through spot welding.
Further, the plurality of spring supports are four spring supports, the four spring supports are divided into two pairs, and each pair of spring supports are symmetrically arranged relative to the center line of the upper cover of the battery pack.
Furthermore, the peripheral edge of the battery pack is provided with a plurality of connecting points which are connected with the lower vehicle body of the vehicle through screws.
According to another aspect of the present invention, there is provided a battery pack having the above-described structure for improving vibration noise of the battery pack.
The present invention also provides a vehicle, such as an electric vehicle, including a lower vehicle body and a battery pack disposed below a bottom portion of the lower vehicle body, the battery pack having the above-described structure for improving vibration noise of the battery pack.
The battery pack, particularly the upper cover in the middle of the battery pack, is provided with a strong pre-compression support in a mode of combining the rigid support (i.e. the incompressible support) arranged in the middle of the battery pack and the spring supports on the periphery, so that the effect of greatly improving the noise reduction is achieved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a prior art assembled relationship of an electric vehicle and a battery pack;
fig. 2 is a schematic structural view of a conventional battery pack;
fig. 3 is a schematic structural view of the battery pack shown in fig. 2, taken along the section a-a;
FIG. 4 shows a phenomenon that a battery pack transmits vibration noise to a compartment in operation of a conventional electric vehicle;
fig. 5 is a schematic view of a structure for improving vibration noise of a battery pack in operation of an electric vehicle (referred to as a noise reduction structure) according to the present invention;
FIG. 6 is a schematic view showing the structure of a damper spring of the noise reducing structure according to the present invention;
FIG. 7 shows an internal structure of the damper spring shown in FIG. 6;
FIG. 8 is a schematic structural view of a rigid carrier of the noise reducing structure according to the present invention; and
figure 9 illustrates a cross-sectional view B-B of the rigid mount shown in figure 8.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the process of implementing the utility model, the inventor finds that: the existing battery pack adopts a mode of tensioning and fixing springs at the periphery, meanwhile, the battery pack (particularly an upper cover of the battery pack) is flat like a paper board, the middle part of the battery pack is relatively weak, and a structure similar to a bulge surface is formed, so that the upper cover of the battery pack beats air, and the bulge surface can generate booming noise (noise) in vehicle motion.
Fig. 5-9 illustrate some embodiments according to the utility model.
With combined reference to fig. 5, 6 and 8, the noise reduction structure of the present invention includes a rigid bracket 52 in the middle of a battery pack and a plurality of spring brackets 51 arranged around the battery pack, the battery pack having connection points at the peripheral edges thereof and being connected to the lower body of the electric vehicle by screws, wherein the rigid bracket 52 is welded to the upper cover of the battery pack, each of the spring brackets 51 is welded to the upper cover of the battery pack, the top of the rigid bracket has a first welding screw 522, the top of each spring bracket has a second welding screw 514, wherein the first welding screw 522 and the second welding screw 514 are used for connecting to the lower body of the electric vehicle, and wherein the rigid bracket and the upper cover of the battery pack have a pre-tightening amount therebetween to generate a pre-tightening force for shock prevention.
Among them, the welding method with the battery pack upper cover is various, and resistance spot welding is preferable, and in this case, it is required to complete welding before the battery pack upper cover is assembled.
In the present invention, the middle of the battery pack (especially, the middle of the upper cover of the battery pack) refers to a position or a vicinity of a position where the vibration amount is the largest, such as a vicinity of a point B of the upper cover of the battery pack in fig. 3.
Because the battery pack upper cover is only a stamping metal plate (the thickness is less than 1mm), the strength of the battery pack upper cover is not high, and the middle part (near the B point) of the battery pack upper cover is far away from the connecting points D1 and D2 of two ends of the battery pack upper cover and a battery pack edge beam (a part with high strength), when the battery pack shakes in the vertical direction, the vibration of the middle part of the battery pack upper cover is relatively large, the middle part of the vibrating battery pack upper cover can flap air, and then the booming noise (booming noise) can be generated.
In a case where the position of the maximum vibration amount is not suitable for welding the rigid bracket, a position near the position suitable for mounting the rigid bracket is selected, and a noise reduction effect which is not easily recognized by the occupant is obtained as compared with the mounting at the position of the maximum vibration amount. In the present invention, the position where the vibration quantity is maximum is obtained by experiment, and the geometric center of the upper cover is empirically selected.
In the utility model, the pre-compression amount is obtained according to the actual situation, and the smaller the pre-compression amount is, the better the pre-compression amount is on the premise of achieving the noise reduction effect. In one embodiment, the upper cover of the battery pack is 40mm away from the lower body (as shown by H in fig. 3), while the middle rigid support has a height of 51mm (as shown by H in fig. 9), and the pre-compression amount is 11 mm.
In one embodiment, four spring supports 51 are used, the rigid support 52 being located on the centerline L of the upper cover, the four spring supports being divided into two pairs, symmetrically disposed about the centerline, as shown in FIG. 5, with one pair of spring supports being spaced closer together and the other pair of springs being spaced further apart due to constraints on the structure of the upper cover. The spring support has the function of damping, and if no damping spring exists, the battery pack, particularly the whole vibration of the upper cover of the battery pack, can be more severe.
In the utility model, the peripheral springs tension the periphery of the upper cover of the battery pack to form a drum surface, and the rigid support in the middle is installed in a pre-pressing mode, which is equivalent to that a drumstick is arranged in the center of the drum surface to press the drum surface to stop sound, so that the drum surface cannot vibrate under external excitation, sound is not easily generated, and the aim of reducing noise is achieved.
In the utility model, as shown in fig. 5, the spring is arranged at a position closer to the connection point of the battery pack upper cover and the battery pack edge beam, so that the spring support is reasonably arranged at the position, and the upper cover cannot be subjected to plastic deformation while being tensioned due to the flexibility of the spring.
With continued reference to fig. 3 and 5, in the middle of the upper cover (near point B), since the distance from the connecting point of the upper cover and the edge beam is relatively long, and the middle of the upper cover is also the position where the amplitude of the vibration of the "drumhead" is maximum, the rigid support arranged at the position can enable the "drumhead" in the middle of the upper cover to form relatively large tension and simultaneously prevent the "drumhead" from being plastically deformed. If the drumhead is still pressed by the spring at the center of the drumhead, the spring is still compressed and stretched along with the drumhead under certain vibration excitation, and the vibration of the drumhead cannot be completely eliminated.
Referring to fig. 6 in combination, the spring bracket 51 includes a top plate 512, a bottom plate 513, and a damping spring 511 welded to and between the top plate and the bottom plate, wherein the second welding screw 514 is welded to the top plate 512. The spring support structure is light in weight on one hand, and on the other hand, the bearing area of the upper cover of the battery pack is enlarged, so that the local stress deformation of the upper cover is avoided.
Preferably, as shown in fig. 7, the top plate 512 and the bottom plate 513 are provided with stamped bosses 512a and 513a, respectively, for welding positioning of the damper spring 511.
With combined reference to fig. 8 and 9, the rigid support 52 includes a box-mounted support body 521 and welding foot plates 523 symmetrically arranged on two sides of the box-mounted support body, wherein the box-mounted support body 521 and the two welding foot plates 523 are integrally formed as a sheet metal part, and a middle rigid support height H (for example, H ═ 51mm) is greater than a gap H (for example, H ═ 40mm) between the upper cover and the lower body of the battery pack. On one hand, the rigid support is light, and on the other hand, the symmetrical welding foot plate structure of the rigid support increases the bearing area of the upper cover of the battery pack, so that the upper cover is prevented from being deformed due to local stress.
Preferably, each bent portion of the sheet metal part is provided with a stamping concave structure 524 (i.e. a reinforcing rib formed by stamping) to increase the structural strength and deformation resistance of the sheet metal part.
The utility model also provides a battery pack, which adopts the structure for improving the vibration noise of the battery pack to improve the noise reduction effect of the battery pack in motion.
The utility model also provides a vehicle, such as an electric automobile, which comprises a lower automobile body and a battery pack arranged below the bottom of the lower automobile body, wherein the battery pack adopts the structure for improving the vibration noise of the battery pack, so that the noise reduction effect of the battery pack in motion is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The structure for improving the vibration noise of the battery pack is characterized by comprising a rigid support arranged in the middle of the battery pack and a plurality of spring supports arranged on the periphery of the battery pack, wherein the rigid support is welded with an upper cover of the battery pack, each spring support is welded with the upper cover of the battery pack, a first welding screw is arranged at the top of the rigid support, a second welding screw is arranged at the top of each spring support, the first welding screw and the second welding screw are used for being connected with a lower body of a vehicle, and a set pre-compression amount is arranged between the rigid support and the upper cover of the battery pack to generate a vibration-stopping pre-compression force.
2. The structure for improving vibration noise of a battery pack according to claim 1, wherein the spring support includes a bottom plate, a top plate, and a damper spring between and welded to the top plate and the bottom plate.
3. The structure for improving vibration noise of a battery pack according to claim 2, wherein the top plate and the bottom plate are respectively provided with a stamping boss for welding positioning of the damping spring.
4. The structure for improving vibration noise of a battery pack according to claim 1, wherein the rigid bracket includes a pack bracket body and welding foot plates symmetrically arranged on both sides of the pack bracket body.
5. The structure for improving vibration noise of the battery pack according to claim 4, wherein the box-mounted bracket body and the two welding foot plates are integrally formed sheet metal parts.
6. The structure for improving vibration noise of a battery pack according to claim 1, wherein the pre-compression amount is 8mm to 12 mm.
7. The structure for improving vibration noise of a battery pack according to claim 1, wherein the plurality of spring brackets are four spring brackets, the four spring brackets are divided into two pairs, and each pair of spring brackets is symmetrically arranged with respect to a center line of an upper cover of the battery pack.
8. The structure for improving vibration noise of a battery pack according to claim 1, wherein the battery pack has a plurality of connection points at the peripheral edge thereof, which are connected to the lower body of the vehicle by screws.
9. A battery pack for improving vibration noise, comprising the structure for improving vibration noise of a battery pack according to any one of claims 1 to 8.
10. A vehicle comprising a lower vehicle body and a battery pack disposed below a bottom portion of the lower vehicle body, wherein the battery pack is the battery pack for improving vibration noise according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524926.2U CN215751869U (en) | 2021-07-06 | 2021-07-06 | Structure for improving vibration noise of battery pack, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524926.2U CN215751869U (en) | 2021-07-06 | 2021-07-06 | Structure for improving vibration noise of battery pack, battery pack and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN215751869U true CN215751869U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121524926.2U Active CN215751869U (en) | 2021-07-06 | 2021-07-06 | Structure for improving vibration noise of battery pack, battery pack and vehicle |
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| CN (1) | CN215751869U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117028827A (en) * | 2023-10-09 | 2023-11-10 | 中太海碳(上海)环保科技有限公司 | Fixing module of low-temperature film storage container and low-temperature film storage container |
-
2021
- 2021-07-06 CN CN202121524926.2U patent/CN215751869U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117028827A (en) * | 2023-10-09 | 2023-11-10 | 中太海碳(上海)环保科技有限公司 | Fixing module of low-temperature film storage container and low-temperature film storage container |
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