Battery pack

Abstract

This utility model belongs to the field of battery technology and discloses a battery pack, including a battery box, a battery module, and a buffer assembly. The battery box includes a detachably connected box body and a box cover. The box body is provided with a receiving groove, and the box cover is used to seal the opening of the receiving groove. The battery module is disposed in the receiving groove. The buffer assembly includes a buffer member and a connecting member. The buffer member is sandwiched between the battery module and the box cover, and the buffer member is detachably connected to at least one of the battery module and the box cover through the connecting member. The battery pack of this utility model, through the setting of the buffer assembly, allows the buffer member to be detachably connected to at least one of the battery module and the box cover through the connecting member. This facilitates the removal of the box cover during rework and maintenance, reduces the pulling force on the battery module and internal components during box cover removal, ensures the safety of the internal structure of the battery box, and improves the maintenance convenience of the battery pack.

Description

Technical Field

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

[0002] In the field of lithium battery technology, high-density, high-power, and long-life lithium battery packs have always been a focus of scientific and technological researchers. Currently, lithium battery packs typically consist of a battery box and battery modules housed within it. To increase the capacity of the battery modules within the battery box, the box body and cover of the same size are usually thinned. However, the thinned cover has poor overall rigidity, especially in the middle section, requiring the addition of double-sided adhesive foam to support the gap between the battery modules and the cover, reducing cover vibration and thus reducing fatigue strength or causing abnormal noise in the battery pack. Existing technology has the following drawbacks: While double-sided adhesive foam can ensure the stability of the foam connecting the battery modules and the cover, the adhesive method can cause tension on the battery modules and their electrical components when the cover needs to be removed during rework or maintenance, affecting the structural safety. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack with a simple structure, and its buffer component can be detachably connected to the cover via a connector, which has good maintenance convenience.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A battery pack is provided, including a battery box, a battery module, and a buffer assembly. The battery box includes a detachably connected body and a cover. The body is provided with a receiving groove, and the cover is used to seal the opening of the receiving groove. The battery module is disposed in the receiving groove. The buffer assembly includes a buffer member and a connector. The buffer member is sandwiched between the battery module and the cover, and the buffer member is detachably connected to at least one of the battery module and the cover via the connector.

[0006] As a preferred embodiment of the battery pack, the connector includes a first magnet, the buffer is embedded with the first magnet, and the buffer is magnetically connected to at least one of the battery module and the case cover via the first magnet.

[0007] As a preferred embodiment of the battery pack, a magnetic block is provided on the cover and / or the battery module at a position corresponding to the first magnet, and the first magnet can be magnetically connected to the magnetic block.

[0008] As a preferred embodiment of the battery pack, the battery module includes a plurality of cells spaced apart along a first direction, the length of the buffer extends along the first direction, and a plurality of the first magnets are spaced apart within the buffer along the first direction, the first magnets being movable along the first direction.

[0009] As a preferred embodiment of the battery pack, the buffer member has a recessed mounting groove on one side adjacent to the cover. The length of the mounting groove extends along the first direction and at least penetrates one side of the buffer member arranged along the first direction. Limiting portions are protruding on both sidewalls of the mounting groove arranged along the second direction. The first magnet is disposed in the mounting groove, and at least a portion of the first magnet is engaged between the limiting portion and the bottom of the mounting groove. The first direction is perpendicular to the second direction.

[0010] As a preferred embodiment of the battery pack, the first magnet includes a fixing part and a connecting part. The fixing part is engaged between the limiting part and the bottom of the mounting groove. The connecting part is provided on the side of the fixing part away from the bottom of the mounting groove. The connecting part is disposed between the two limiting parts and is flush with the side of the buffer member with the opening of the mounting groove. The connecting part can be magnetically connected to the cover.

[0011] As a preferred embodiment of the battery pack, the connecting part is provided with a connecting hole, and the screw-locking member passes through the connecting hole and abuts against the bottom of the mounting groove, and the fixing part abuts against the limiting part.

[0012] As a preferred embodiment of the battery pack, when the buffer is magnetically connected to the lid by the first magnet, the battery pack also includes a second magnet. The magnetism of the second magnet is opposite to that of the first magnet. When the second magnet approaches the first magnet, the first magnet can overcome the attraction to the lid and move away from the lid, so as to separate the first magnet from the lid.

[0013] As a preferred embodiment of the battery pack, the battery pack further includes a CCS assembly, the CCS assembly comprising two sets of conductive sheets spaced apart along a second direction, the cushioning element comprising foam, and each set of conductive sheets having the foam adhered to it; or...

[0014] The CCS assembly also includes an integrated busbar, and the buffer includes a rigid insulating block disposed on the integrated busbar and located between two adjacent sets of conductive sheets.

[0015] As a preferred embodiment of the battery pack, before the connector is connected to the cover, the side of the buffer member away from the battery module is either attached to or spaced apart from the cover.

[0016] The beneficial effects of this utility model are as follows: By setting the buffer component, the buffer can be detachably connected to at least one of the battery module and the cover through the connector, which facilitates the removal of the cover during rework and maintenance, reduces the pulling of the battery module and internal components when removing the cover, ensures the safety of the internal structure of the battery box, and improves the maintenance convenience of the battery pack. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of the battery pack according to an embodiment of the present utility model;

[0020] Figure 3 This is an explosion diagram of the battery pack according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 4 yes Figure 3 Enlarged view of point A;

[0022] Figure 5 This is an exploded schematic diagram of the battery pack according to an embodiment of the present invention. Figure 2 .

[0023] In the picture:

[0024] 1. Battery box; 11. Box body; 12. Box cover; 121. Magnetic block; 13. Receiving slot; 2. Battery module; 21. Battery cell; 3. Buffer assembly; 31. Buffer component; 311. Mounting slot; 312. Limiting part; 32. Connector; 321. Fixing part; 322. Connecting part; 4. Second magnet; 5. CCS assembly; 51. Conductive sheet; 52. Integrated busbar. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] like Figure 1 and Figure 2 As shown, the battery pack of this utility model embodiment includes a battery box 1, a battery module 2, and a buffer assembly 3. The battery box 1 includes a detachably connected box body 11 and a box cover 12. The box body 11 is provided with a receiving groove 13, and the box cover 12 is used to seal the opening of the receiving groove 13. The battery module 2 is disposed in the receiving groove 13. The buffer assembly 3 includes a buffer member 31 and a connector 32. The buffer member 31 is sandwiched between the battery module 2 and the box cover 12. The buffer member 31 is detachably connected to at least one of the battery module 2 and the box cover 12 through the connector 32.

[0030] It is understandable that by setting the buffer component 3, the buffer component 31 can be detachably connected to at least one of the battery module 2 and the cover 12 through the connector 32, which facilitates the removal of the cover 12 during rework and maintenance, reduces the pulling on the battery module 2 and internal components when removing the cover 12, ensures the safety of the internal structure of the battery box 1, and improves the maintenance convenience of the battery pack.

[0031] Optionally, the battery pack also includes a sealing strip, which is provided between the housing 11 and the cover 12. The sealing strip enhances the sealing performance between the housing 11 and the cover 12, ensuring the airtightness of the battery box 1 and thus improving the safety of the battery module 2.

[0032] In this embodiment, the connector 32 includes a first magnet, and the buffer 31 is embedded with the first magnet. The buffer 31 is magnetically connected to at least one of the battery module 2 and the cover 12 via the first magnet. For example, the buffer 31 is magnetically connected to the cover 12 via the first magnet, meaning that the side of the buffer 31 away from the battery module 2 can abut against the cover 12 via the first magnet. The first magnet has a simple structure and is easy to use. After the foam is fully installed, the cover 12 is placed on the box body 11, and the first magnet actively attracts to the cover 12 due to magnetic force, thereby achieving automatic connection between the foam and the cover 12, which is convenient. Of course, the connector 32 can also be an elastic element, which is set inside the foam to drive the foam to abut against the cover 12, or a bolt can be used to pull the foam to fit the cover 12. No further restrictions are imposed here.

[0033] In addition, the buffer 31 can also be magnetically connected to the battery module 2 via the first magnet, that is, the side of the buffer 31 away from the cover 12 can abut against the cover 12 via the first magnet. Alternatively, along the connection direction between the battery module 2 and the cover 12, two first magnets are provided on the buffer 31 at intervals, and the two first magnets magnetically attract the battery module 2 and the cover 12 respectively.

[0034] Preferably, a magnetic block 121 is provided on the lid 12 at a position corresponding to the first magnet, allowing the first magnet to be magnetically connected to the magnetic block 121. The magnetic block 121 enhances the magnetic attraction between the lid 12 and the first magnet, ensuring a stable magnetic connection. In this embodiment, the magnetic block 121 is made of a metal sheet with high magnetic flux (such as silicon steel), embedded within the lid 12 to ensure strong connection between the lid 12 and the magnetic block 121.

[0035] Furthermore, by cooperating with the first magnet and the magnetic block 121, and by using the buffer 31 to be manufactured with minimum tolerance, when there is a gap between the buffer 31 and the cover 12, the first magnet and the magnetic block 121 can pull the cover 12 toward the battery module 2, thus solving the problem that traditional adhesive foam can only provide pushing force but not pulling force to ensure the contact effect.

[0036] Of course, when the buffer 31 is magnetically connected to the battery module 2, a magnetic block 121 is also provided on the battery module 2 at the position corresponding to the first magnet.

[0037] Furthermore, combining Figure 3As shown, taking the buffer 31 magnetically attracted to the cover 12 via the first magnet as an example, the battery module 2 includes multiple battery cells 21 spaced apart along a first direction (the first direction is the X direction shown in the figure). The length of the buffer 31 extends along the first direction, and multiple first magnets are spaced apart within the buffer 31 along the first direction. The first magnets can move along the first direction. Different lengths of the battery module 2 result in different lengths and rigidities of the cover 12. Accordingly, based on the analysis results, the position of the first magnet is slidable so that the first magnet is located at a position on the cover 12 where it is prone to wobbling and is connected to the magnetic block 121 for support. This improves the compatibility and versatility of the buffer assembly 3 and ensures the fitting accuracy between the first magnet and the magnetic block 121.

[0038] Correspondingly, the magnetic block 121 can be configured for adjustable installation. For example, the cover 12 is provided with a limiting groove extending in the first direction on the side facing the battery module 2. The magnetic block 121 is slidably disposed in the limiting groove and can be locked by bolts.

[0039] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, a mounting groove 311 is recessed on one side of the buffer member 31 adjacent to the lid 12. The length of the mounting groove 311 extends along a first direction and at least penetrates one side of the buffer member 31 arranged along the first direction. Limiting portions 312 protrude from both sidewalls of the mounting groove 311 arranged along a second direction (the second direction is the Y direction shown in the figure). A first magnet is disposed within the mounting groove 311, and at least a portion of the first magnet is engaged between the limiting portion 312 and the bottom of the mounting groove 311. The first direction is perpendicular to the second direction. The mounting groove 311 provides space for the first magnet and facilitates adjustment of its position along the opening of the groove, while also guiding the movement of the first magnet. The limiting portion 312 restricts the first magnet, preventing it from detaching from the opening of the mounting groove 311. Furthermore, the action of the first magnet and the magnetic block 121 ensures that the limiting portion 312 abuts against the lid 12, guaranteeing the buffering effect of the buffer member 31 on the lid 12.

[0040] Specifically, the first magnet includes a fixing part 321 and a connecting part 322. The fixing part 321 is engaged between the limiting part 312 and the bottom of the mounting groove 311. The connecting part 322 is provided on the side of the fixing part 321 away from the bottom of the mounting groove 311. The connecting part 322 is disposed between the two limiting parts 312, and the connecting part 322 is flush with the side of the buffer 31 with the mounting groove 311. The connecting part 322 can be magnetically connected to the box cover 12. The magnetic connection with the magnetic block 121 on the box cover 12 is achieved through the connecting part 322 between the two limiting parts 312, reducing the distance between the first magnet and the magnetic block 121 and ensuring the magnetic attraction effect between the first magnet and the magnetic block 121; by fixing the fixing part 321 between the limiting part 312 and the bottom of the mounting groove 311, the fixing part 321 can push the limiting part 312 to abut against the box cover 12 when the connecting part 322 moves towards the box cover 12, ensuring the abutment and buffering effect between the buffer member 31 and the box cover 12.

[0041] Furthermore, a connecting hole is provided through the connecting part 322, and the screw-locking member passes through the connecting hole and abuts against the bottom of the mounting groove 311, and the fixing part 321 abuts against the limiting part 312. For example, the connecting hole is a countersunk hole, that is, the connecting part 322 is provided with a countersunk hole, and the end of the bolt is screwed through the countersunk hole and abuts against the bottom of the mounting groove 311 until the fixing part 321 and the limiting part 312 are tightly abutted, so as to realize the fixed installation of the first magnet, which is convenient for connection, and the setting of the countersunk hole prevents the head of the bolt from protruding from the connecting part 322 and affecting the connection with the magnetic block 121.

[0042] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, when the buffer 31 is magnetically connected to the cover 12 via the first magnet, the battery pack also includes a second magnet 4. The magnetism of the second magnet 4 is opposite to that of the first magnet. When the second magnet 4 approaches the first magnet, the first magnet can overcome the attraction to the cover 12 and move away from the cover 12, thus separating the first magnet from the cover 12. When the cover 12 needs to be removed for maintenance, the second magnet 4 can be brought close to the position of the cover 12 corresponding to the first magnet. Under the repulsive force of the second magnet 4, the first magnet separates from the cover 12, allowing the cover 12 to be removed. This method is convenient, time-saving, labor-saving, and highly efficient in maintenance.

[0043] Preferably, before the connector 32 is connected to the cover 12, the side of the buffer 31 away from the battery module 2 is either attached to or spaced apart from the cover 12. That is, the buffer 31 is set according to the lower limit of the production tolerance, controlling the overall thickness of the buffer 31 so that its maximum thickness is just right against the cover 12, or the cover 12 is connected to the buffer 31 via the connector 32 by slight pressing. This reduces the possibility of the cover 12 of the battery pack bulging outwards due to excessive thickness of the buffer 31, ensuring the structural stability of the battery pack.

[0044] In this embodiment, the battery pack further includes a CCS assembly 5, which includes two sets of conductive sheets 51 spaced apart along a second direction. The buffer 31 includes foam, and foam is adhered to each set of conductive sheets 51. The foam has strong deformation capability and good cushioning effect, which can enhance the connection strength of the conductive sheets 51.

[0045] In addition, the CCS assembly 5 also includes an integrated busbar 52. Besides foam, the buffer 31 may also include a rigid insulating block. The rigid insulating block is disposed on the integrated busbar 52 and located between two adjacent sets of conductive sheets 51. The rigid insulating block has high structural strength, thus making the connection between the insulating block and the battery module 2 and the cover 12 more stable. The overall rigid connection ensures that the cover 12 will not buckle outwards, thereby ensuring the structural stability of the battery pack.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery pack, characterized by, include: A battery box (1) includes a detachably connected box body (11) and a box cover (12). The box body (11) is provided with a receiving groove (13), and the box cover (12) is used to seal the opening of the receiving groove (13). Battery module (2), wherein the battery module (2) is disposed in the receiving slot (13); A buffer assembly (3) includes a buffer element (31) and a connector (32). The buffer element (31) is sandwiched between the battery module (2) and the cover (12). The buffer element (31) is detachably connected to at least one of the battery module (2) and the cover (12) via the connector (32).

2. The battery pack of claim 1, wherein, The connector (32) includes a first magnet, and the buffer (31) is embedded with the first magnet. The buffer (31) is magnetically connected to at least one of the battery module (2) and the box cover (12) through the first magnet.

3. The battery pack of claim 2, wherein, A magnetic block (121) is provided on the cover (12) and / or the battery module (2) at the position corresponding to the first magnet, and the first magnet can be magnetically connected to the magnetic block (121).

4. The battery pack of claim 2, wherein, The battery module (2) includes a plurality of cells (21) spaced apart along a first direction. The length of the buffer (31) extends along the first direction. A plurality of first magnets are spaced apart within the buffer (31) along the first direction. The first magnets are movable along the first direction.

5. The battery pack of claim 4, wherein, The buffer (31) has a recessed mounting groove (311) on one side adjacent to the box cover (12). The length of the mounting groove (311) extends along the first direction and at least penetrates one side of the buffer (31) arranged along the first direction. Limiting portions (312) are protruding on both side walls of the mounting groove (311) arranged along the second direction. The first magnet is disposed in the mounting groove (311), and at least part of the first magnet is engaged between the limiting portion (312) and the bottom of the mounting groove (311). The first direction is perpendicular to the second direction.

6. The battery pack of claim 5, wherein, The first magnet includes a fixing part (321) and a connecting part (322). The fixing part (321) is engaged between the limiting part (312) and the bottom of the mounting groove (311). The connecting part (322) is provided on the side of the fixing part (321) away from the bottom of the mounting groove (311). The connecting part (322) is disposed between the two limiting parts (312), and the connecting part (322) is flush with the side of the buffer (31) where the groove of the mounting groove (311) is located. The connecting part (322) can be magnetically connected to the box cover (12).

7. The battery pack of claim 6, wherein, A connecting hole is provided through the connecting part (322), and the screw-locking member passes through the connecting hole and abuts against the bottom of the mounting groove (311). The fixing part (321) abuts against the limiting part (312).

8. The battery pack of any one of claims 2-7, wherein, When the buffer (31) is magnetically connected to the cover (12) by the first magnet, the battery pack also includes a second magnet (4). The magnetism of the second magnet (4) is opposite to that of the first magnet. When the second magnet (4) approaches the first magnet, the first magnet can overcome the attraction to the cover (12) and move away from the cover (12) so that the first magnet is separated from the cover (12).

9. The battery pack of any one of claims 1-7, wherein, The battery pack further includes a CCS assembly (5), the CCS assembly (5) comprising two sets of conductive sheets (51) spaced apart along a second direction, the buffer (31) comprising foam, and each set of conductive sheets (51) having foam adhered to it; or, The CCS component (5) further includes an integrated busbar (52), and the buffer (31) includes a rigid insulating block disposed on the integrated busbar (52) and located between two adjacent sets of conductive sheets (51).

10. The battery pack of any one of claims 1-7, wherein, Before the connector (32) is connected to the cover (12), the side of the buffer (31) away from the battery module (2) is attached to or spaced apart from the cover (12).

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