A battery pack resistant to vibrations

Abstract

The utility model relates to an anti -vibration battery pack, including the casing, and be located in the soft package electric core and the pole lug support of casing inside, the inside interval of casing's lateral wall is equipped with a plurality of hollow vibration isolation groove, the soft package electric core includes a plurality of electric core, the pole lug support is close to the side interval of soft package electric core is equipped with a plurality of guide groove, the groove bottom of guide groove is equipped with the pole lug hole, wherein, the lateral wall of guide groove is the inclined plane of inclination, the width of guide groove gradually reduces towards the direction away from the soft package electric core, the utility model discloses through setting up the vibration isolation groove, can strengthen the anti -vibration performance of whole, in addition, through setting up the pole lug support, can isolate the electric core body and the pole lug, can effectively avoid the electric core body damage when the pole lug welding due to the misoperation.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and more specifically, relates to an anti-vibration battery pack. Background Technology

[0002] A battery pack is an energy storage device composed of multiple battery cells connected in series and parallel, and integrated with key components such as a battery management system and a thermal management system. Currently, lithium batteries are typically packaged in cylindrical, prismatic, and pouch forms. Pouch batteries, due to their advantages such as low weight and variety of shapes, are widely used in the automotive and electronic equipment industries.

[0003] Currently, existing battery packs typically connect the cells to the adapter plate or circuit board via welding. Since pouch cells are usually packaged in aluminum-plastic film, this film is easily punctured by external forces, and improper welding can easily damage the cell itself. Furthermore, because pouch cells lack a robust outer shell for protection, their vibration resistance is relatively poor compared to cylindrical and prismatic cells, making them more susceptible to internal damage under impact. Therefore, greater emphasis needs to be placed on vibration protection. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an anti-vibration battery pack to solve the problems existing in the background art.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] An anti-vibration battery pack includes: a housing, wherein a plurality of hollow vibration-damping grooves are spaced apart on the inner sidewall of the housing; a pouch cell disposed within the housing, the pouch cell comprising a plurality of cells; and a tab support disposed within the housing, wherein a plurality of guide grooves are spaced apart on the side of the tab support near the pouch cell, and tab holes are provided at the bottom of the guide grooves; wherein the sidewall of the guide groove is an inclined slope, and the width of the guide groove gradually decreases in the direction away from the pouch cell.

[0007] In the above scheme, the vibration isolation groove is located in the side wall around the shell, which can play a mechanical buffering role, thereby enhancing the vibration resistance and protection performance, and preventing external forces from damaging the internal structure. The soft-pack battery cell is assembled from multiple individual battery cells. The tab of each battery cell passes through the corresponding tab hole on the tab bracket. The tab bracket can isolate the battery cell body and the tab, playing a protective role, so as to prevent damage to the battery cell body due to misoperation during the tab welding. At the same time, it can also facilitate the positioning during welding. The tab bracket is provided with a guide groove, and the tab hole is located at the bottom of the guide groove. The side walls on both sides of the guide groove are inclined, which can guide the battery cell tab during installation, making it easier and faster to guide the battery cell tab to fall into the tab hole, making the installation operation more convenient, faster and more efficient. In addition, the inclined design can avoid generating a large lateral force on the tab during installation and prevent the tab from deforming.

[0008] In one example of this utility model, the tab support is provided with a plurality of guide blocks at intervals on the side near the soft-pack battery cell. The cross-sectional shape of the guide blocks is trapezoidal, and the short side of the trapezoid is close to the direction where the soft-pack battery cell is located.

[0009] In the above scheme, the cross-section of the guide block is an isosceles trapezoid, and the interval between the guide blocks forms a guide groove. The short side of the trapezoidal guide block is close to the side of the soft-pack battery cell so that the inclined walls on both sides of the guide groove can smoothly guide the tab into the tab hole.

[0010] In one example of this utility model, a cell tab adapter plate is also included. The tab support has a placement groove on the side away from the soft-pack cell. The cell tab adapter plate is installed in the placement groove, and the tab of the cell is connected to the cell tab adapter plate through the tab hole.

[0011] In the above scheme, the cell tab adapter plate is used to connect with the tabs of the cell, thereby connecting multiple cells in the pouch cell to form a whole.

[0012] In one example of this utility model, the electrode tab of the battery cell is connected to the battery cell electrode tab adapter plate by welding.

[0013] In the above scheme, the battery cell tabs are welded to the battery cell tab adapter plate to achieve a stable and reliable electrical connection.

[0014] In one example of this utility model, a BMS board is mounted on the side of the pouch cell.

[0015] In the above scheme, the BMS board is used to monitor and manage the status of the pouch cells in real time to ensure the normal operation of the pouch cells.

[0016] In one example of this utility model, the housing includes a bottom shell and a top shell, and a plurality of connecting holes are provided on the mating end faces of the bottom shell and the top shell.

[0017] In the above solution, the bottom shell and the top shell can be connected by screws and other connectors through the connection holes, which facilitates disassembly and assembly.

[0018] In one example of this utility model, the soft-pack battery cell is installed inside the bottom shell, and the gap between the soft-pack battery cell and the bottom shell is filled with thermally conductive adhesive.

[0019] In the above solution, the thermally conductive adhesive can play a role in heat dissipation and heat equalization, which is beneficial to the heat dissipation of the pouch cell and improves its service life. At the same time, it can also fix the pouch cell and resist vibration, avoiding damage caused by external forces.

[0020] In one example of this utility model, the bottom shell is provided with a plurality of upright plates, the upright plates extend into the front shell, the inner side of the front shell is provided with slots that cooperate with the upright plates, the upright plates are provided with positioning holes, and the side of the electrode bracket is provided with mounting holes that cooperate with the positioning holes.

[0021] In the above solution, the electrode bracket can be positioned and fixed through the positioning hole and the mounting hole. The upright plate is located on the side wall inside the bottom shell and extends into the front shell, so that the mounting hole and the positioning hole can be locked from the side through screws and other connecting parts, making the installation operation more convenient.

[0022] In one example of this utility model, a decorative piece and a breathable membrane are installed on the face shell. The top of the face shell is provided with a first mounting groove that mates with the decorative piece. A second mounting groove that mates with the breathable membrane is provided in the first mounting groove. A vent is provided in the second mounting groove. An exhaust groove is provided on one side of the first mounting groove. The exhaust groove extends into the first mounting groove and communicates with the second mounting groove.

[0023] In the above scheme, the decorative piece and the breathable membrane are respectively installed in the first mounting groove and the second mounting groove. The second mounting groove is located in the first mounting groove. The breathable membrane is pressed into the second mounting groove by the decorative piece. When the internal pressure of the shell increases, the gas can push the breathable membrane up through the vent hole and be discharged outside the shell through the exhaust groove to achieve the effect of pressure relief, thereby maintaining the internal pressure balance of the shell and improving safety.

[0024] In one example of this utility model, a sealing ring is provided between the mating end faces of the front shell and the bottom shell.

[0025] In the above scheme, the sealing ring is located on the mating end face of the front shell and the bottom shell to ensure the sealing performance after the front shell and the bottom shell are assembled.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a vibration damping groove in the side wall of the housing, which acts as a mechanical buffer, thereby enhancing the overall vibration resistance and preventing external forces from damaging the internal structure. This invention isolates the battery cell body from the electrode tabs by setting up an electrode tab bracket, protecting the battery cell body from damage caused by misoperation during electrode tab welding. It also facilitates positioning during welding. Furthermore, the electrode tab bracket has a guide groove with beveled sidewalls on both sides, which guides the battery cell electrode tabs during installation, allowing them to quickly fall into the electrode tab holes at the bottom of the groove. This makes installation more convenient, faster, and more efficient. In addition, the beveled design avoids excessive lateral force on the electrode tabs during installation, preventing electrode tab deformation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of an anti-vibration battery pack according to an embodiment of the present invention.

[0029] Figure 2 for Figure 1 Exploded view of the vibration-resistant battery pack in the middle Figure 3 for Figure 2 A magnified view of area A in the middle.

[0030] Figure 4 for Figure 2 A magnified view of area B in the middle.

[0031] Figure 5 for Figure 2 A magnified view of region C in the middle.

[0032] Figure 6 This is a three-dimensional view of one side of the top surface of the electrode holder.

[0033] Figure 7 This is a three-dimensional view of one side of the bottom surface of the electrode holder.

[0034] Figure 8 This is a front view of the bottom surface of the electrode holder.

[0035] Figure 9 for Figure 8 A cross-sectional view at position AA.

[0036] Figure 10 This is a schematic diagram of the internal structure of the shell.

[0037] Figure 11 This is a schematic diagram of the internal structure of the bottom shell.

[0038] Explanation of the reference numerals in the figure: 1-House; 11-Bottom shell; 111-Upright plate; 112-Positioning hole; 113-Baffle; 114-Limiting groove; 115-Annular groove; 12-Face shell; 121-First mounting groove; 122-Second mounting groove; 123-Ventilation hole; 124-Exhaust groove; 125-Slot; 13-Connection hole; 14-Leaving groove; 15-Decorative piece; 16-Ventilation membrane; 17-Handle; 18-Socket; 19-Vibration isolation groove; 2-Soft-pack battery cell; 21-Buffer foam; 3-Electrode tab bracket; 31-Guide block; 32-Guide groove; 33-Electrode tab hole; 34-Placement groove; 35-Mounting hole; 36-Positioning groove; 4-Battery cell electrode tab adapter plate; 41-Metal connecting piece; 5-BMS board; 6-High-voltage connection bar; 7-Sealing ring; 8-Screw. Detailed Implementation

[0039] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0040] Please refer to Figures 1 to 11 In a preferred embodiment, an anti-vibration battery pack is provided, including a housing 1, a pouch cell 2, and a tab support 3: The housing 1 has a plurality of hollow vibration isolation grooves 19 spaced apart inside its sidewall; the pouch cell 2 is disposed inside the housing 1 and includes a plurality of cells; the tab support 3 has a plurality of guide grooves 32 spaced apart on the side of the tab support 3 near the pouch cell 2, and the bottom of the guide grooves 32 has tab holes 33; wherein, the sidewall of the guide groove 32 is an inclined slope, and the width of the guide groove 32 gradually decreases in the direction away from the pouch cell 2.

[0041] Specifically, such as Figure 10 and Figure 11As shown, the vibration isolation groove 19 is located in the side wall around the perimeter of the housing 1, which can play a mechanical buffering role, thereby enhancing the vibration resistance and preventing external forces from damaging the internal structure. Even when the battery pack is dropped, it can effectively prevent damage to the internal cells. The soft-pack cell 2 is assembled from multiple individual cells. As shown in the figure, the tabs of the cells are located on the side close to the tab support 3, that is, on the top of the soft-pack cell 2. The tabs of each cell pass through the corresponding tab hole 33 on the tab support 3. The tab support 3 can isolate the cell body and the tab, playing a protective role to prevent damage to the cells. To prevent damage to the battery cell body and soft-pack battery cell due to misoperation during welding, the tab bracket 3 is designed to facilitate positioning during welding and improve welding efficiency. The tab bracket 3 has multiple guide grooves 32 spaced apart, and the tab hole 33 is located on the bottom surface of the guide groove 32. The side walls of the guide groove 32 are inclined, which can guide the tab of the battery cell during installation, making it easier and faster to guide the tab of the battery cell into the tab hole 33. This makes the installation operation more convenient and efficient. In addition, the inclined design can avoid large lateral forces on the tab during installation and prevent the tab from deforming.

[0042] Preferably, the housing 1 is made of plastic, which has good insulation properties. No additional insulation work is required during assembly, which can improve assembly efficiency.

[0043] Not limited to, the arrangement of the soft-pack battery cell 2 in this embodiment is 2×10. In specific implementation, the number and arrangement of the battery cells can be adjusted as needed.

[0044] Please refer to Figures 6 to 9 The electrode holder 3 has multiple guide blocks 31 spaced apart on the side near the soft-pack battery cell 2, such as... Figure 9 As shown, the cross-sectional shape of the guide block 31 is an isosceles trapezoid, and the interval between the guide blocks 31 forms a guide groove 32. The hypotenuse of the guide block 31 is the sidewall of the guide groove 32. When viewed from the cross-sectional direction of the guide block 31, the short side of the trapezoid faces downward, that is, the side closer to the soft-pack battery cell 2. This causes the width of the guide groove 32 to narrow in the direction away from the soft-pack battery cell 2, so that the battery cell tab can be smoothly inserted into the tab hole 33, which is convenient for installation.

[0045] Understandably, the two outermost guide grooves 32 are formed by the guide block 31 and the side of the tab support 3.

[0046] Preferably, the side of the tab support 3 is provided with several positioning grooves 36 for positioning, which facilitates automated handling.

[0047] Please refer to Figures 2 to 6The tab support 3 has a placement groove 34 on the side away from the soft-pack battery cell 2. The battery cell tab adapter plate 4 is installed in the placement groove 34. After the battery cell tab passes through the tab hole 33, it is connected to the battery cell tab adapter plate 4. The battery cell tab adapter plate 4 connects multiple batteries in the soft-pack battery cell 2 to form an integral structure.

[0048] Furthermore, the battery cell tabs are connected to the battery cell tab adapter plate 4 by welding to achieve a stable and reliable electrical connection.

[0049] Specifically, such as Figure 4 As shown, the battery cell tab adapter plate 4 has multiple metal connecting pieces 41, each corresponding to a battery cell. The battery cell tab adapter plate 4 has holes corresponding to the tab holes 33. The tabs of the battery cell are welded to the metal connecting pieces 41 through the tab holes 33 and the holes on the battery cell tab adapter plate 4. Then, the metal connecting pieces 41 are welded onto the battery cell tab adapter plate 4, thereby realizing the connection between the battery cell and the battery cell tab adapter plate 4. The metal connecting pieces 41 are made of copper and aluminum composite to connect to the positive and negative tabs of the battery cell, respectively.

[0050] Since the welding work is carried out on the top of the cell tab adapter plate 4, the cell body in the soft-pack cell 2 can be effectively protected from damage by the tab bracket 3 and the cell tab adapter plate 4, resulting in higher safety and reliability.

[0051] Please refer to Figure 2 A BMS board 5 is installed on the side of the soft-pack battery cell 2. The BMS board 5 is electrically connected to the battery cell tab adapter board 4, so that the status of the soft-pack battery cell 2 can be monitored and managed in real time to ensure the normal operation of the soft-pack battery cell 2.

[0052] Preferably, the BMS board 5 is connected to the battery cell tab adapter board 4 via two high-voltage connection bars 6.

[0053] Preferably, the outer side of the soft-pack battery cell 2 is provided with several buffer foams 21 to further protect the soft-pack battery cell 2 from vibration.

[0054] Please refer to Figure 1 and Figure 2 The housing 1 includes a bottom shell 11 and a top shell 12. Multiple connecting holes 13 are provided on the mating end faces of the bottom shell 11 and the top shell 12. The bottom shell 11 and the top shell 12 can be connected by screws 8 through the connecting holes 13, which facilitates disassembly and assembly.

[0055] Preferably, the outer side of the bottom box and the front cover 12 has a relief groove 14 at the location of the connection hole 13 to facilitate the installation and removal of the screws 8.

[0056] It is worth mentioning that the vibration isolation groove 19 is composed of the hollow parts on the side walls of the bottom shell 11 and the front shell 12.

[0057] Please refer to Figure 11 The soft-pack battery cell 2 is installed inside the bottom shell 11. The gap between the soft-pack battery cell 2 and the bottom shell 11 is filled with thermally conductive adhesive (not shown in the figure). The thermally conductive adhesive can play a role in heat dissipation and heat equalization, which is beneficial to the heat dissipation of the soft-pack battery cell 2 and improves its service life. At the same time, it can also fix the soft-pack battery cell 2 and resist vibration, avoiding damage caused by external forces.

[0058] Furthermore, a partition 113 is provided inside the bottom shell 11, and a limiting groove 114 for installing the soft-pack battery cell 2 is formed at the bottom of the bottom shell 11 through the partition 113.

[0059] Please refer to Figure 5 and Figure 11 The bottom shell 11 has multiple upright plates 111 inside, and the inner side of the front shell 12 has slots 125 that mate with the upright plates 111. The upright plates 111 have positioning holes 112, and the side of the tab bracket 3 has mounting holes 35 that mate with the positioning holes 112. The tab bracket 3 can be positioned and fixed through the positioning holes 112 and the mounting holes 35 to prevent it from shaking or tilting, and to stably limit the soft-pack battery cell 2 below. The upright plates 111 are located on the side wall inside the bottom shell 11 and extend into the front shell 12 so that the mounting holes 35 and the positioning holes 112 can be locked from the side by screws 8, making the installation operation simpler.

[0060] Preferably, to avoid interference with the BMS board 5 during installation, the upright plate 111 is provided on three sides inside the bottom shell 11, and correspondingly, the mounting holes 35 on the tab bracket 3 are provided on the corresponding three sides.

[0061] Please refer to Figure 2 , Figure 3 and Figure 10 A decorative piece 15 and a breathable membrane 16 are installed on the face shell 12. The top of the face shell 12 is provided with a first mounting groove 121 that mates with the decorative piece 15. A second mounting groove 122 that mates with the breathable membrane 16 is provided in the first mounting groove 121. A vent hole 123 is provided in the second mounting groove 122. Two exhaust grooves 124 are provided on one side of the first mounting groove 121. One end of the two exhaust grooves 124 extends into the first mounting groove 121 and communicates with the second mounting groove 122.

[0062] Specifically, the decorative piece 15 and the breathable membrane 16 are respectively installed in the first mounting groove 121 and the second mounting groove 122. The second mounting groove 122 is located in the first mounting groove 121. The decorative piece 15 presses the breathable membrane 16 into the second mounting groove 122. When the internal pressure of the housing 1 increases, the gas can push the breathable membrane 16 up through the vent hole 123 and be discharged outside the housing 1 through the exhaust groove 124 to achieve the pressure relief effect, thereby maintaining the internal pressure balance of the housing 1 and improving safety. The decorative piece 15 achieves a hidden design for the vent hole 123 and the breathable membrane 16, which can prevent foreign objects or liquids from entering the vent hole 123 while ensuring the pressure relief effect and making the appearance more aesthetically pleasing.

[0063] Among them, decorative piece 15 is the nameplate or trademark of this battery pack.

[0064] Please refer to Figure 2 and Figure 5 A sealing ring 7 is provided between the mating end faces of the front shell 12 and the bottom shell 11. An annular groove 115 is provided on the end face of the bottom shell 11. The annular groove 115 is closed. The sealing ring 7 is installed in the annular groove 115. The sealing ring 7 is used to ensure the sealing performance of the front shell 12 and the bottom shell 11 after assembly, so that the battery pack has good waterproof performance and improves the reliability of use.

[0065] Please refer to Figure 1 The top of the faceplate 12 is provided with a handle 17 and a socket 18. The handle 17 facilitates the transfer and handling of this battery pack, and the socket 18 is installed on the faceplate 12 by screws 8 for electrical connection with external devices.

[0066] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0068] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration-resistant battery pack, characterized in that, include: The housing has multiple hollow vibration isolation grooves spaced apart inside its sidewalls; A pouch cell is disposed within the housing, and the pouch cell comprises multiple cells; A tab support is disposed inside the housing. The tab support has multiple guide grooves spaced apart on the side near the soft-pack battery cell. The bottom of the guide groove has a tab hole. The guide groove has an inclined sidewall, and its width gradually decreases in the direction away from the pouch cell.

2. The vibration-resistant battery pack according to claim 1, characterized in that, The tab support is provided with multiple guide blocks at intervals on the side close to the pouch cell. The cross-sectional shape of the guide blocks is trapezoidal, and the short side of the trapezoid is close to the direction where the pouch cell is located.

3. The vibration-resistant battery pack according to claim 1, characterized in that, It also includes a cell tab adapter plate. The tab bracket has a placement groove on the side away from the soft-pack cell. The cell tab adapter plate is installed in the placement groove. The tab of the cell is connected to the cell tab adapter plate through the tab hole.

4. The vibration-resistant battery pack according to claim 3, characterized in that, The electrode tabs of the battery cell are connected to the battery cell electrode tab adapter plate by welding.

5. The vibration-resistant battery pack according to claim 1, characterized in that, A BMS board is mounted on the side of the pouch cell.

6. The vibration-resistant battery pack according to claim 1, characterized in that, The housing includes a bottom shell and a top shell, and multiple connection holes are provided on the mating end faces of the bottom shell and the top shell.

7. The vibration-resistant battery pack according to claim 6, characterized in that, The pouch cell is installed inside the bottom shell, and the gap between the pouch cell and the bottom shell is filled with thermally conductive adhesive.

8. The vibration-resistant battery pack according to claim 6, characterized in that, The bottom shell has multiple upright plates that extend into the top shell. The inside of the top shell has slots that mate with the upright plates. The upright plates have positioning holes, and the side of the tab bracket has mounting holes that mate with the positioning holes.

9. The vibration-resistant battery pack according to claim 6, characterized in that, The faceplate is equipped with a decorative piece and a breathable membrane. The top of the faceplate is provided with a first mounting groove that mates with the decorative piece. The first mounting groove is provided with a second mounting groove that mates with the breathable membrane. The second mounting groove is provided with a vent. An exhaust groove is provided on one side of the first mounting groove, the exhaust groove extends into the first mounting groove and communicates with the second mounting groove.

10. The vibration-resistant battery pack according to claim 6, characterized in that, A sealing ring is provided between the mating end faces of the front shell and the bottom shell.

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