Battery pack box and battery pack

Abstract

The utility model relates to battery technology field discloses battery package box and battery package, include: frame, including adjacent first frame body and second frame body, first frame body has first connecting position one end close to second frame body, second frame body has second connecting position one end close to first frame body, along z direction, the height of first connecting position is greater than the height of second connecting position, connecting piece, connect setting between first frame body and second frame body, connecting piece includes first convex structure and second convex structure, along z direction, the height of first convex structure is greater than the height of second convex structure, first convex structure inserts to first frame body and is connected in first connecting position, second convex structure inserts to second frame body and is connected in second connecting position. The utility model can make full use of the whole height of first frame body, strengthen the connecting effect between first frame body and second frame body, improve the structural strength of battery package box, prolong the service life of battery package box.

Description

Technical Field

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

[0002] Today, new energy vehicles are developing rapidly. With increasingly stringent safety requirements, the safety design of battery packs is becoming a key focus. The frame of the battery pack housing is typically connected using welded aluminum alloy profiles. However, the weld strength is lower than that of the aluminum alloy base material, making the weld joints of the frame a weak point. In particular, when adjacent profiles have different heights, the weld height can only be flush with the shorter profile, while the protruding portion of the taller profile cannot function as a connection. This results in high stress at the weld, making it prone to cracking, and weakening the connection strength between the two profiles, easily leading to connection failure. Utility Model Content

[0003] In view of this, the present invention provides a battery pack housing and a battery pack to solve the problem in the prior art that when the heights of two adjacent profiles are inconsistent, the stress at the weld is large, the weld is prone to cracking, the connection strength of the two profiles is low, and connection failure is easy to occur.

[0004] In a first aspect, the present invention provides a battery pack housing, comprising: a frame, which is arranged circumferentially, the frame comprising a first frame and a second frame arranged adjacent to each other, the first frame having a first connection position at one end near the second frame, and the second frame having a second connection position at one end near the first frame, wherein the height of the first connection position is greater than the height of the second connection position along the z-direction; and a connector, which is connected between the first frame and the second frame, the connector comprising a first protruding structure and a second protruding structure, wherein the height of the first protruding structure is greater than the height of the second protruding structure along the z-direction, the first protruding structure being inserted into the first frame and connected to the first connection position, and the second protruding structure being inserted into the second frame and connected to the second connection position.

[0005] Beneficial effects: The connector connects adjacent first and second frames with different heights. Specifically, the first protruding structure of the connector is connected to the first frame, and the second protruding structure is connected to the second frame, thus fixing the first and second frames together. Furthermore, the height of the first protruding structure is greater than the height of the second protruding structure. This allows the connector to be adapted to the heights of the first and second frames, fully utilizing the entire height of the first frame, strengthening the connection between the first and second frames, improving the structural strength of the battery pack housing, and extending its service life.

[0006] Secondly, this utility model also provides a battery pack, including: the aforementioned battery pack housing; and a battery module disposed within the battery pack housing.

[0007] Beneficial effects: By improving the overall structural strength of the battery pack housing, damage to the battery pack housing when subjected to vibration is prevented, thereby ensuring the limiting and protection function of the battery pack housing for the battery modules and guaranteeing the safety performance of the battery pack. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of a battery pack housing according to an embodiment of the present utility model;

[0010] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0011] Figure 3 This is a schematic diagram of the structure of a first frame according to an embodiment of the present utility model;

[0012] Figure 4 This is a schematic diagram of the structure of a second frame according to an embodiment of the present utility model;

[0013] Figure 5 for Figure 4 A magnified view of part B in the diagram;

[0014] Figure 6This is a structural schematic diagram of a connector according to an embodiment of the present utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Frame; 11. First frame; 111. First connecting position; 112. First enclosing plate; 1121. First plate; 11211. Sixth hole; 1122. Second plate; 1123. Third plate; 1124. Fourth plate; 113. First partition plate; 1131. First hole; 114. First cavity; 1141. First dividing cavity; 12. Second frame; 121. Second connecting position; 122. Bottom frame; 123. Second enclosing plate; 1231 1. Fifth plate; 1232. Sixth plate; 12321. Third hole; 1233. Seventh plate; 12331. Fourth hole; 1234. Notch; 124. Second partition plate; 125. Second cavity; 1251. Second sub-cavity; 2. Connector; 21. First protruding structure; 211. Second hole; 22. Second protruding structure; 221. Fifth hole; 23. Connecting structure; 3. First fastener; 4. First weld; 5. Second fastener; 6. Base plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0019] According to an embodiment of the present invention, a battery pack housing is provided, comprising: a frame 1, which is arranged circumferentially, the frame 1 including a first frame 11 and a second frame 12 arranged adjacent to each other, the first frame 11 having a first connection position 111 at one end near the second frame 12, and the second frame 12 having a second connection position 121 at one end near the first frame 11, the height of the first connection position 111 being greater than the height of the second connection position 121 along the z-direction; and a connector 2, which is connected between the first frame 11 and the second frame 12, the connector 2 including a first protruding structure 21 and a second protruding structure 22, the height of the first protruding structure 21 being greater than the height of the second protruding structure 22 along the z-direction, the first protruding structure 21 being inserted into the first frame 11 and connected to the first connection position 111, and the second protruding structure 22 being inserted into the second frame 12 and connected to the second connection position 121.

[0020] In this embodiment, the battery pack housing uses a connector 2 to connect adjacent first frames 11 and second frames 12 with different heights. Specifically, the first protruding structure 21 of the connector 2 is connected to the first frame 11, and the second protruding structure 22 of the connector 2 is connected to the second frame 12, thereby fixing the first frame 11 and the second frame 12. Furthermore, the height of the first protruding structure 21 is greater than the height of the second protruding structure 22. Thus, the first protruding structure 21 with a larger height is connected to the first frame 11 with a larger height, and the second protruding structure 22 with a smaller height is connected to the second frame 12 with a smaller height. This allows the connector 2 to be adapted to the heights of the first frame 11 and the second frame 12, thereby fully utilizing the entire height of the first frame 11, strengthening the connection between the first frame 11 and the second frame 12, improving the structural strength of the battery pack housing, and extending the service life of the battery pack housing.

[0021] It is worth noting that the aforementioned first connection position 111 is the position where the first frame 11 is connected to the connector 2, and the aforementioned second connection position 121 is the position where the second frame 12 is connected to the connector 2. Therefore, in this embodiment, only the height relationship between the first connection position 111 and the second connection position 121 along the z-direction is defined, while the height relationship between the other positions of the first frame 11 (excluding the first connection position 111) and the other positions of the second frame 12 (excluding the second connection position 121) is not defined.

[0022] It should be noted that, while ensuring that the first protruding structure 21 can be inserted into the first frame 11, the height of the first protruding structure 21 can be made as large as possible, that is, the height of the first protruding structure 21 should be slightly smaller than the height of the first connecting position 111; similarly, while ensuring that the second protruding structure 22 can be inserted into the second frame 12, the height of the second protruding structure 22 can be made as large as possible, that is, the height of the second protruding structure 22 should be slightly smaller than the height of the second connecting position 121. Of course, the heights of the first protruding structure 21 and the second protruding structure 22 can be specifically set according to actual needs.

[0023] In this embodiment, the first protruding structure 21 is inserted into the first frame 11 and connected to the first connection position 111, and the second protruding structure 22 is inserted into the second frame 12 and connected to the second connection position 121. While facilitating the connection between the first protruding structure 21 and the first frame 11 and the second protruding structure 22 and the second frame 12, the first protruding structure 21 and the second protruding structure 22 do not occupy additional space in the battery pack, thus ensuring the space utilization and energy density of the battery pack.

[0024] It is worth noting that, for commercial vehicle battery packs, the battery pack housing typically includes an upper housing and a lower housing stacked along the z-direction. Both the upper housing and the lower housing include structures such as a frame 1. In this embodiment, the frame 1 and the connector 2 are typically applied to the upper housing.

[0025] In one embodiment, such as Figure 2 As shown, the battery pack housing also includes a first fastener 3, which passes through the first connection position 111 and the first protruding structure 21 along the z-direction, connecting the first connection position 111 and the first protruding structure 21. The first fastener 3 connects the first connection position 111 and the first protruding structure 21 of the first frame 11, ensuring the connection strength between the first frame 11 and the connector 2 while facilitating the assembly and disassembly of the first frame 11 and the connector 2.

[0026] Specifically, in this embodiment, such as Figure 1 and Figure 2 As shown, the first frame 11 extends along the x-direction, and several first fasteners 3 are spaced apart along the x-direction, thereby improving the connection strength between the first frame 11 and the connector 2 and ensuring connection reliability.

[0027] It is worth noting that the first fastener 3 can also be set to several at intervals along the y-direction.

[0028] Furthermore, in this embodiment, the first fastener 3 is a bolt, which passes through the top surface of the first connection position 111, through the first frame 11, and is fastened to the first protruding structure 21.

[0029] Furthermore, in one embodiment, such as Figure 2 As shown, the first connection position 111 is welded to the connector 2 on one side edge facing the second connection position 121 to form a first weld 4, which extends along the z-direction. This arrangement further improves the connection strength between the first frame 11 and the connector 2.

[0030] It is worth noting that the first weld 4 can be provided along the entire edge of the first connection position 111 in the z direction. That is, the first connection position 111 is welded to the connector 2 along the entire edge of the first connection position 111 in the z direction.

[0031] In one embodiment, such as Figure 2As shown, the battery pack housing also includes a second fastener 5, which passes through the second connection position 121 and the second protruding structure 22 along the x-direction. The second frame 12 extends along the y-direction, and the second fastener 5 connects the second connection position 121 and the second protruding structure 22. By using the second fastener 5 to connect the second connection position 121 and the second protruding structure 22 of the second frame 12, the connection strength between the second frame 12 and the connector 2 is ensured, while facilitating the assembly and disassembly of the second frame 12 and the connector 2.

[0032] Specifically, in this embodiment, such as Figure 2 As shown, several second fasteners 5 are spaced apart along the y-direction, thereby improving the connection strength between the second frame 12 and the connector 2 and ensuring connection reliability. Furthermore, in this embodiment, several second fasteners 5 are also spaced apart along the z-direction. That is, the second fasteners 5 are arranged in an array at the second connection position 121.

[0033] Furthermore, in this embodiment, the second fastener 5 is a rivet, which is inserted through the outer side of the second connection position 121 and passes through the inner side of the second protruding structure 22 and the second connection position 121 for fixing.

[0034] It is worth noting that, in order to strengthen the connection between the second frame 12 and the connector 2, the edge of the second connection position 121 facing the first connection position 111 can also be welded to the connector 2.

[0035] In one embodiment, such as Figure 3 As shown, the first frame 11 includes a first enclosing plate 112 and a first partition plate 113. The first enclosing plate 112 encloses and forms a first cavity 114. The first partition plate 113 is disposed in the first cavity 114 and connected to the first enclosing plate 112, so as to divide the first cavity 114 into several first sub-cavities 1141 along the z-direction. Several first protruding structures 21 are spaced apart along the z-direction, and the several first protruding structures 21 are respectively inserted into several first sub-cavities 1141. The first fastener 3 passes through several first protruding structures 21 and at least one first partition plate 113. By using the first fastener 3 to connect the first protruding structures 21, the first enclosing plate 112, and the first partition plate 113, the connection strength between the first frame 11 and the connector 2 can be improved.

[0036] Specifically, in this embodiment, such as Figure 3As shown, the first enclosing plate 112 includes a first plate 1121 and a second plate 1122 spaced apart along the z-direction, and a third plate 1123 and a fourth plate 1124 spaced apart along the y-direction. The first plate 1121 is connected between the third plate 1123 and the fourth plate 1124, and the second plate 1122 is also connected between the third plate 1123 and the fourth plate 1124. The first plate 1121, the second plate 1122, the third plate 1123, and the fourth plate 1124 enclose to form a first cavity 114. A first partition plate 113 is connected to the third plate 1123 and the fourth plate 1124 on opposite sides along the y-direction, and is parallel to the first plate 1121 and the second plate 1122. One or more first partition plates 113 can be provided to divide the first cavity 114 into at least two first sub-cavities 1141.

[0037] It is worth noting that the third plate 1123 is welded to the connector 2 to form the first weld 4.

[0038] Specifically, in this embodiment, such as Figure 3 As shown, a first partition plate 113 is provided to divide the first cavity 114 into two first sub-cavities 1141. Two first protruding structures 21 are provided at intervals along the z-direction, and the two first protruding structures 21 are respectively inserted into the two first sub-cavities 1141. The first partition plate 113 is sandwiched between the two first protruding structures 21. The first fastener 3 passes through the first plate 1121, the first partition plate 113, and the first protruding structure 21 located above, and is fastened to the first protruding structure 21 located below.

[0039] It is worth noting that, such as Figure 3 As shown, the first plate 1121 has a sixth hole 11211, the first partition plate 113 has a first hole 1131, and the first protruding structure 21 has a second hole 211. The sixth hole 11211, the first hole 1131, and the second hole 211 are arranged in a relatively connected manner, and the first fastener 3 is simultaneously inserted into the sixth hole 11211, the first hole 1131, and the second hole 211.

[0040] In one embodiment, such as Figure 4 and Figure 5As shown, the second frame 12 includes a bottom frame 122, a second enclosing plate 123, and a second partition plate 124. The bottom frame 122 and the second enclosing plate 123 are connected to enclose and form a second cavity 125. The second partition plate 124 is disposed in the second cavity 125 and connected to the second enclosing plate 123 to divide the second cavity 125 into several second sub-cavities 1251 along the z-direction. Several second protruding structures 22 are spaced apart along the z-direction. Several second protruding structures 22 are respectively inserted into several second sub-cavities 1251. A second fastener 5 simultaneously penetrates the second enclosing plate 123 and the second protruding structure 22 corresponding to a second sub-cavity 1251.

[0041] Specifically, in this embodiment, such as Figure 5 As shown, the second enclosing plate 123 includes a fifth plate 1231, a sixth plate 1232, and a seventh plate 1233. The fifth plate 1231 and the bottom frame 122 are spaced apart relative to each other along the z-direction, and the sixth plate 1232 and the seventh plate 1233 are spaced apart relative to each other along the x-direction. The fifth plate 1231 is connected between the upper ends of the sixth plate 1232 and the seventh plate 1233, and the lower ends of the sixth plate 1232 and the seventh plate 1233 are both connected to the bottom frame 122. The bottom frame 122, the fifth plate 1231, the sixth plate 1232, and the seventh plate 1233 enclose and form a second cavity 125. The second partition plate 124 is connected to the sixth plate 1232 and the seventh plate 1233 on opposite sides along the x-direction, and the second partition plate 124 is parallel to the fifth plate 1231 and the bottom frame 122. The second partition plate 124 can be provided in one or more ways, thereby dividing the second cavity 125 into at least two second sub-cavities 1251.

[0042] Specifically, in this embodiment, such as Figure 5 As shown, a second partition plate 124 is provided to divide the second cavity 125 into two second sub-cavities 1251. Two second protruding structures 22 are spaced apart along the z-direction, and the two second protruding structures 22 are respectively inserted into the two second sub-cavities 1251. The second partition plate 124 is sandwiched between the two second protruding structures 22. Two rows of second fasteners 5 are spaced apart along the z-direction, and each row is spaced apart along the y-direction with a number of second fasteners 5. The two rows of second fasteners 5 are respectively provided corresponding to the two second protruding structures 22.

[0043] Furthermore, such as Figure 5 As shown, the connection points of the fifth plate 1231, the sixth plate 1232, and the seventh plate 1233 have a notch 1234 at the end near the first frame 11 to facilitate the insertion of the second protruding structure 22. Furthermore, the height of the remaining sixth plate 1232 along the z-direction is the height of the second connection position 121.

[0044] It is worth noting that, such as Figure 5 As shown, the sixth plate 1232 has a third hole 12321, the seventh plate 1233 has a fourth hole 12331, and the second protruding structure 22 has a fifth hole 221. The third hole 12321, the fourth hole 12331 and the fifth hole 221 are connected to each other. The second fastener 5 passes through the third hole 12321, the fourth hole 12331 and the fifth hole 221 simultaneously.

[0045] Furthermore, in one embodiment, such as Figure 6 As shown, the connector 2 also includes a connecting structure 23, which extends along the z-direction. One end of the first protruding structure 21 is connected to the connecting structure 23, and the other end of the first protruding structure 21 extends toward the interior of the first frame 11. One end of the second protruding structure 22 is connected to the connecting structure 23, and the other end of the second protruding structure 22 extends toward the interior of the second frame 12. The first protruding structure 21 and the second protruding structure 22 are arranged at a predetermined angle. Specifically, the first protruding structure 21 extends along the x-direction, and the second protruding structure 22 extends along the y-direction.

[0046] In one embodiment, such as Figure 2 As shown, the end of the first frame 11 near the second frame 12 is located on the bottom frame 122 and is fitted to the upper surface of the bottom frame 122. Specifically, the lower surface of the second frame 1122 is fitted to the upper surface of the bottom frame 122.

[0047] Furthermore, in one embodiment, such as Figure 1 and Figure 2 As shown, the battery pack housing also includes a base plate 6, which is spliced ​​with the base frame 122 along the x-direction, and the first frame 11 is attached to the upper surface of the base plate 6.

[0048] Specifically, such as Figure 1 As shown, two first frame bodies 11 are spaced apart in the y-direction, and two second frame bodies 12 are spaced apart in the x-direction. The two first frame bodies 11 and the two second frame bodies 12 are alternately connected circumferentially. The two sides of the base plate 6 in the x-direction are respectively attached to the opposite sides of the bottom frames 122 of the two second frame bodies 12. The two ends of the first frame body 11 in the x-direction are respectively disposed on the bottom frames 122 of the two second frame bodies 12, and the portion between the two ends of the first frame body 11 in the x-direction is disposed on the base plate 6.

[0049] According to an embodiment of the present invention, another aspect provides a battery pack, comprising: the aforementioned battery pack housing; and a battery module disposed within the battery pack housing.

[0050] The battery pack using this embodiment improves the overall structural strength of the battery pack housing, preventing damage to the battery pack housing when subjected to vibration. This ensures the limiting and protective function of the battery pack housing for the battery modules, thereby guaranteeing the safety performance of the battery pack.

[0051] Furthermore, the battery pack housing includes an upper housing and a lower housing stacked along the z-direction. Correspondingly, the battery module includes an upper module and a lower module, with the upper module disposed in the upper housing and the lower module disposed in the lower housing.

[0052] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack case characterized by, include: A border (1) is arranged to enclose the perimeter. The border (1) includes a first frame (11) and a second frame (12) arranged adjacent to each other. The first frame (11) has a first connection position (111) at the end near the second frame (12), and the second frame (12) has a second connection position (121) at the end near the first frame (11). Along the z direction, the height of the first connection position (111) is greater than the height of the second connection position (121). A connector (2) is connected between the first frame (11) and the second frame (12). The connector (2) includes a first protruding structure (21) and a second protruding structure (22). Along the z-direction, the height of the first protruding structure (21) is greater than the height of the second protruding structure (22). The first protruding structure (21) is inserted into the first frame (11) and connected to the first connection position (111). The second protruding structure (22) is inserted into the second frame (12) and connected to the second connection position (121).

2. The battery pack enclosure of claim 1, wherein, The battery pack housing also includes a first fastener (3), which passes through the first connection position (111) and the first protruding structure (21) along the z direction. The first fastener (3) connects the first connection position (111) and the first protruding structure (21).

3. The battery pack enclosure of claim 2, wherein, The first connection position (111) is welded to the connector (2) on one side edge facing the second connection position (121) to form a first weld (4), which extends along the z-direction.

4. The battery pack enclosure of claim 1, wherein, The battery pack housing also includes a second fastener (5), which passes through the second connection position (121) and the second protruding structure (22) along the x direction. The second frame (12) extends along the y direction, and the second fastener (5) connects the second connection position (121) and the second protruding structure (22).

5. The battery pack enclosure of claim 2 or 3, wherein, The first frame (11) includes a first enclosing plate (112) and a first partition plate (113). The first enclosing plate (112) encloses and forms a first cavity (114). The first partition plate (113) is disposed in the first cavity (114) and connected to the first enclosing plate (112) to divide the first cavity (114) into several first sub-cavities (1141) along the z-direction. Several first protruding structures (21) are spaced apart along the z-direction. Several first protruding structures (21) are respectively inserted into several first sub-cavities (1141). The first fastener (3) passes through several first protruding structures (21) and at least one first partition plate (113).

6. The battery pack enclosure of claim 4, wherein, The second frame (12) includes a bottom frame (122), a second enclosure plate (123), and a second partition plate (124). The bottom frame (122) and the second enclosure plate (123) are connected to enclose and form a second cavity (125). The second partition plate (124) is disposed in the second cavity (125) and connected to the second enclosure plate (123) to divide the second cavity (125) into several second sub-cavities (1251) along the z-direction. Several second protruding structures (22) are spaced apart along the z-direction. Several second protruding structures (22) are respectively inserted into several second sub-cavities (1251). A second fastener (5) simultaneously penetrates the second enclosure plate (123) and the second protruding structure (22) corresponding to a second sub-cavity (1251).

7. The battery pack enclosure of claim 6, wherein, The first frame (11) is located on the bottom frame (122) at one end near the second frame (12), and is fitted to the upper surface of the bottom frame (122).

8. The battery pack housing according to claim 7, characterized in that, The battery pack housing also includes a base plate (6), which is spliced ​​with the base frame (122) along the x direction, and the first frame (11) is attached to the upper surface of the base plate (6).

9. The battery pack housing according to any one of claims 1 to 4, characterized in that, The connector (2) further includes a connecting structure (23), which extends along the z-direction. One end of the first protruding structure (21) is connected to the connecting structure (23), and the other end of the first protruding structure (21) extends toward the interior of the first frame (11). One end of the second protruding structure (22) is connected to the connecting structure (23), and the other end of the second protruding structure (22) extends toward the interior of the second frame (12). The first protruding structure (21) and the second protruding structure (22) are arranged at a predetermined angle.

10. A battery pack, characterized in that, include: Battery pack housing as claimed in any one of claims 1 to 9; The battery module is housed within the battery pack housing.

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