Battery pack box body

Abstract

The utility model belongs to the field of battery pack box bodies, and provides a battery pack box body which comprises a plurality of locking blocks distributed on a front plate, and the locking blocks protrude along the inner part of the box body and are vertical to the front plate; the cross beam is arranged in the box body, a plurality of connecting blocks are distributed on the side wall, close to the front plate, of the cross beam, the connecting blocks and the locking blocks are arranged in a one-to-one correspondence mode, and locking pieces are detachably connected to the connecting blocks. Compared with the prior art, the utility model has the advantages that the locking block on the front plate and the connecting block on the cross beam are matched with the locking bolt and the nut for use, so that the cross beam can be mounted without welding, and enough space is provided for mounting electrical elements of the box body; and the position of the cross beam can be adjusted through the locking bolt, so that the pre-tightening force of the cross beam on the battery cell can be timely adjusted according to the expansion condition of the battery cell in the working process of the battery pack, and the service life and the safety of the battery pack are improved.

Description

Technical Field

[0001] The utility model belongs to the field of battery pack boxes, and in particular relates to a battery pack box. Background Art

[0002] As a crucial component of the battery pack, the battery case not only supports the entire battery module structure but also provides the necessary sealing to protect internal components from the external environment. Its design also enables effective thermal management, ensuring the battery operates within an appropriate temperature range. To further enhance the overall mechanical strength and rigidity of the battery case and prevent physical damage from vibration or collision during vehicle operation, horizontal and vertical beams are typically installed within the battery pack.

[0003] In traditional battery pack case designs, horizontal and vertical beams are usually fixed to the case by welding. Although this method can provide sufficient fixing strength, it also brings a series of problems. First, the welding process requires precise positioning and special tooling equipment to ensure that the horizontal and vertical beams can be accurately installed in the predetermined position, and the material deformation or other damage caused by high temperature must be avoided during the welding process. Secondly, because the space inside the battery pack case is very limited, the welding operation becomes extremely complicated, which increases the difficulty of operation and the risk of poor welding, such as uneven welds, missing welds or air holes, which may affect the airtightness and waterproof performance of the case. Another important issue is that once the welding is completed, the horizontal and vertical beams become part of the case structure and cannot be easily removed or adjusted. This is especially inconvenient for electrical components that require regular maintenance or replacement, increasing the cost and complexity of subsequent maintenance. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a battery pack box.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide a battery pack box, comprising: a plurality of locking blocks distributed on the front plate, the locking blocks protruding along the interior of the box and arranged perpendicular to the front plate;

[0006] The crossbeam is arranged in the box body, and a plurality of connecting blocks are distributed on the side wall of the crossbeam close to the front plate, each of the connecting blocks is arranged in a one-to-one correspondence with the locking block, and a locking piece is detachably connected to the connecting block, and the locking piece can be movably connected to the locking block along the normal direction of the front plate;

[0007] The crossbeam can move closer to or farther away from the front plate due to a change in the position of the locking member connected to the locking block, so as to adjust the pre-tightening force applied by the crossbeam to the battery cell.

[0008] In the above-mentioned battery pack case, the locking part includes a locking bolt and a nut. The locking bolt is arranged in the connecting block. A threaded hole is provided in the locking block. The end of the locking bolt is threadedly connected to the threaded hole, and the nut threadedly connected to the locking bolt is tightened against the connecting block to limit the movement of the crossbeam relative to the front plate in the case.

[0009] In the above-mentioned battery pack case, a clearance hole and a guide hole are coaxially arranged on the connecting block. The clearance hole and the guide hole are interconnected and arranged in a stepped manner. A T-shaped end is formed at the end of the locking bolt away from the front plate. The T-shaped end can be movably arranged in the clearance hole when the locking bolt passes through the guide hole.

[0010] The technical solution adopted by the present invention to solve the technical problem is to provide a battery pack box, including a front plate and a crossbeam arranged on the box;

[0011] A plurality of protrusions are distributed on the front plate, and the protrusions face the interior of the box and are arranged perpendicular to the front plate;

[0012] The crossbeam is arranged in the box body, and a plurality of positioning bosses are distributed on the side wall of the crossbeam close to the front plate, each positioning boss is arranged in a one-to-one correspondence with the protruding block, and a connecting piece is detachably connected to the positioning boss;

[0013] When the positioning boss and the protruding block abut against each other, the connecting member can be connected to the protruding block along a direction perpendicular to the normal line of the front plate to fix the crossbeam in the box.

[0014] In the above-mentioned battery pack case, the protruding block is provided with a first locking hole along the vertical direction, and the positioning boss is provided with a connecting hole. The connecting member can be connected to the first locking hole when the positioning boss is inserted into the protruding block.

[0015] In the above-mentioned battery pack case, a locking plane and a through hole are also provided on the positioning boss. The locking plane is arranged in the horizontal direction, and the through hole is arranged in the vertical direction. One end of the through hole is connected to the locking plane, and the other end is connected to the connecting hole, so that the connecting part can pass through the through hole and press against the locking plane.

[0016] In the above-mentioned battery pack case, the protruding block and the positioning boss are both cylindrical, and a semicircular groove is formed on the protruding block, and a semicircular protrusion is formed on the positioning boss. The semicircular protrusion and the semicircular groove are arranged at the same height so that the semicircular protrusion can be movably clamped in the semicircular groove when the crossbeam and the front plate are installed.

[0017] In the above-mentioned battery pack case, a second locking hole arranged in the vertical direction is opened on the bottom wall of the semicircular groove, and the connecting piece is arranged on the bottom wall of the semicircular protrusion. The semicircular protrusion can be pressed against the semicircular groove when the connecting piece is movably inserted into the second locking hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The utility model provides a battery pack box body that uses a locking block on the front panel and a connecting block on the crossbeam in conjunction with locking bolts and nuts, thereby achieving installation of the crossbeam without welding. The overall operation is simple, the installation cost is reduced, and sufficient space is provided for the installation of electrical components in the box body. In addition, the position of the crossbeam can be adjusted by the locking bolt, so that the pre-tightening force of the crossbeam on the battery cell can be adjusted in time according to the expansion of the battery cell during the operation of the battery pack, thereby improving the life and safety of the battery pack.

[0020] (2) By movably sleeved the connection hole on the raised block and cooperating with the connection piece to press against the locking plane, the electrical components can be pre-installed during the assembly of the battery pack, and then the crossbeam can be installed, thereby improving the overall assembly efficiency.

[0021] (3) The semicircular groove and the semicircular protrusion are movably engaged with each other, which ensures that the connecting piece can be accurately and smoothly inserted into the second locking hole. This simplifies the assembly operation and realizes a detachable connection between the crossbeam and the front plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the present application;

[0023] Figure 2 yes Figure 1 Schematic diagram of the cross section at AA;

[0024] Figure 3 It is a schematic diagram of the structure of the locking block on the front plate;

[0025] Figure 4 It is a schematic diagram of the structure of the connecting block on the beam;

[0026] Figure 5 yes Figure 4 Rear view;

[0027] Figure 6 is a schematic diagram of the structure of the first locking hole on the raised block;

[0028] Figure 7 It is a schematic diagram of the structure of the locking plane, through hole and connecting hole on the beam;

[0029] Figure 8 It is a schematic diagram of the structure of the semicircular groove on the front plate;

[0030] Figure 9 It is a schematic diagram of the structure in which the connecting piece is arranged on a semicircular protrusion.

[0031] In the figure, 1, box body; 2, front plate; 20, locking block; 200, threaded hole; 21, raised block; 210, first locking hole; 211, semicircular groove; 211a, second locking hole;

[0032] 3. Crossbeam; 30. Connecting block; 300. Clearance hole; 301. Guide hole; 31. Locking piece; 310. Locking bolt; 310a. T-shaped end; 311. Nut; 32. Positioning boss; 320. Connecting hole; 321. Locking plane; 322. Through hole; 323. Semicircular protrusion; 33. Connecting piece. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0034] Example 1:

[0035] like Figures 1 to 9 As shown, the utility model provides a battery pack case 1, comprising a front plate 2 and a crossbeam 3 arranged on the case 1; a plurality of locking blocks 20 are distributed on the front plate 2, and the locking blocks 20 protrude along the interior of the case 1 and are arranged perpendicular to the front plate 2; the crossbeam 3 is arranged in the case 1, and a plurality of connecting blocks 30 are distributed on the side wall of the crossbeam 3 close to the front plate 2, each connecting block 30 is arranged in a one-to-one correspondence with the locking block 20, and a locking member 31 is detachably connected to the connecting block 30, and the locking member 31 can be movably connected to the locking block 20 along the normal direction of the front plate 2; the crossbeam 3 can be closer to or farther away from the front plate 2 due to the change in the position of the locking member 31 connected to the locking block 20, so as to adjust the pre-tightening force given to the battery cell by the crossbeam 3.

[0036] This solution mainly uses the detachable process of the crossbeam 3 and the front plate 2 to replace the welding process in the prior art. Specifically, Figures 1 to 5 As shown, when the battery pack is assembled, the electrical components can be placed in the box 1 in advance, and then the crossbeam 3 can be installed as shown in FIG. Figure 1At the position shown, it is worth noting that during the installation of the crossbeam 3, the connecting block 30 on the crossbeam 3 is facing the front plate 2 and is arranged at the same height as the locking block 20 on the front plate 2, so that the locking member 31 can be accurately connected to the locking block 20, thereby completing the detachable installation method between the crossbeam 3 and the front plate 2. The overall operation is simple, which reduces the welding installation cost and provides sufficient space for the installation of electrical components of the box 1. In addition, the position of the crossbeam 3 can be adjusted by the locking member 31, so that the pre-tightening force of the crossbeam 3 on the battery cell can be adjusted in time according to the expansion of the battery cell during operation of the battery pack, thereby improving the life and safety of the battery pack.

[0037] The locking member 31 includes a locking bolt 310 and a nut 311. The locking bolt 310 is arranged in the connecting block 30. A threaded hole 200 is provided in the locking block 20. The end of the locking bolt 310 is threadedly connected to the threaded hole 200, and the nut 311 threadedly connected to the locking bolt 310 is tightened against the connecting block 30 to limit the movement of the beam 3 relative to the front plate 2 in the box body 1.

[0038] Further, if Figures 2 to 4 As shown, the locking member 31 in this solution is mainly composed of a locking bolt 310 and a nut 311. One end of the locking bolt 310 is set in the connecting block 30, and the other end is threadedly connected to the threaded hole 200 on the locking block 20, thereby fixing the crossbeam 3 on the front plate 2. It is worth noting that Figure 2 When the locking bolt 310 is in a state of being rotated with respect to the locking block 30, the locking bolt 310 can be rotated with respect to the locking block 30, thereby making the locking bolt 310 in a state of being rotated with respect to the locking block 30.

[0039] A clearance hole 300 and a guide hole 301 are coaxially arranged on the connecting block 30. The clearance hole 300 and the guide hole 301 are interconnected and arranged in a stepped manner. A T-shaped end 310a is formed at the end of the locking bolt 310 away from the front plate 2. The T-shaped end 310a can be movably arranged in the clearance hole 300 when the locking bolt 310 passes through the guide hole 301.

[0040] like Figure 2As shown, by utilizing the stepped design of the clearance hole 300 and the guide hole 301, it is possible to provide installation space for the T-shaped end 310a in the connecting block 30, so that when the nut 311 adjusts the spacing of the locking blocks, it can push the crossbeam 3 to gradually move closer relative to the front plate 2. While ensuring a stable and detachable connection between the crossbeam 3 and the front plate 2, it is also possible to adjust the pre-tightening force of the battery cell given by the crossbeam 3, which is convenient and quick and ensures the safety of the battery pack.

[0041] Example 2:

[0042] In addition to the above-mentioned detachable connection method between the crossbeam 3 and the front plate 2 by the connecting block 30 and the locking block 20, the present solution also provides a battery pack case 1, including a front plate 2 and a crossbeam 3 arranged on the case 1; a plurality of protrusions 21 are distributed on the front plate 2, and the protrusions 21 face the interior of the case 1 and are arranged perpendicular to the front plate 2; the crossbeam 3 is arranged in the case 1, and a plurality of positioning bosses 32 are distributed on the side wall of the crossbeam 3 close to the front plate 2, each positioning boss 32 is arranged one-to-one with the protrusion 21, and a connecting member 33 is provided on the positioning boss 32 (not shown in the figure, it can refer to other connecting components such as bolts and screws); the connecting member 33 can be connected to the protrusion 21 in a direction perpendicular to the normal of the front plate 2 when the positioning boss 32 and the protrusion 21 are abutted against each other, so as to fix the crossbeam 3 in the case 1.

[0043] like Figures 6 and 7 As shown, the positioning bosses 32 on the crossbeam 3 and the raised blocks 21 on the front plate 2 are arranged in a one-to-one correspondence with each other, so that when the crossbeam 3 approaches the front plate 2 (including the horizontal direction of the second embodiment and the vertical direction of the subsequent third embodiment), the positioning bosses 32 and the raised blocks 21 can abut against each other, so that the connecting member 33 can be moved along the normal direction perpendicular to the front plate 2 (i.e. Figure 6 The cross beam 3 and the front plate 2 are connected in the vertical direction thereof to the raised block 21, thereby realizing a detachable connection between the cross beam 3 and the front plate 2. The overall operation is simple, which not only provides sufficient space for the installation of electrical components, but also brings great convenience for subsequent maintenance and replacement work.

[0044] The raised block 21 is provided with a first locking hole 210 along the vertical direction, and the positioning boss 32 is provided with a connecting hole 320 . The connecting member 33 can be connected to the first locking hole 210 when the positioning boss is inserted into the raised block.

[0045] Further, if Figures 6 and 7As shown, when the above-mentioned beam 3 gradually approaches the front plate 2, the positioning boss 32 can be movably mounted on the protruding block 21 by relying on the connecting hole 320. Since the connecting member 33 and the first locking hole 210 in this embodiment 2 are both arranged in the vertical direction, and the connecting member 33 in the embodiment 2 can be bolts, screws, and other components such as limit columns, as the protruding block 21 extends into the connecting hole 320, the worker can connect the connecting member 33 to the first locking hole 210. This connection method can also use a threaded matching method to ensure the stability of the beam 3 and the front plate 2 when they are detachable.

[0046] A locking plane 321 and a through hole 322 are also provided on the positioning boss 32. The locking plane 321 is arranged in the horizontal direction, and the through hole 322 is arranged in the vertical direction. One end of the through hole 322 is connected to the locking plane 321, and the other end is connected to the connecting hole 320, so that the connecting member 33 can pass through the through hole 322 and be pressed against the locking plane 321.

[0047] like Figure 7 As shown, when the above-mentioned positioning boss 32 is mounted on the raised block 21, the through hole 322 and the above-mentioned first locking hole 210 are in a coaxial and mutually connected state, so that the connecting member 33 can pass through the through hole 322 and be connected in the first locking hole 210 to realize the fixed connection between the beam 3 and the front plate 2; and a locking plane 321 is provided on the positioning boss 32, which facilitates that after the connecting member 33 is tightened, the fastening surface of the connecting member 33 can fit with the locking plane 321, thereby ensuring the stability of the connection between the beam 3 and the front plate 2, and also improving the assembly efficiency of the structure.

[0048] Example 3:

[0049] Based on the above embodiment 2, the protruding block 21 and the positioning boss 32 in the present embodiment 3 are both cylindrically arranged. Figures 8 and 9 As shown, a semicircular groove 211 is formed on the protruding block 21, and a semicircular protrusion 323 is formed on the positioning boss 32. The semicircular protrusion 323 and the semicircular groove 211 are set at the same height, so that the semicircular protrusion 323 can be clamped in the semicircular groove 211 when the beam 3 and the front plate 2 are installed. It is worth noting that the semicircular protrusion 323 is also formed because the above-mentioned semicircular groove 211 is cut on the positioning boss 32. Therefore, when the beam 3 gradually approaches the front plate 2, the semicircular protrusion 323 is movably clamped in the semicircular groove 211, and then combined with the above-mentioned connecting piece 33 to complete the connection between the beam 3 and the front plate 2.

[0050] A second locking hole 211a is provided on the bottom wall of the semicircular groove 211 in the vertical direction. The connecting member 33 is provided on the bottom wall of the semicircular protrusion 323. The semicircular protrusion 323 can be pressed against the semicircular groove 211 when the connecting member 33 is movably inserted into the second locking hole 211a.

[0051] like Figures 8 and 9 As shown, the connecting piece 33 in the third embodiment adopts a connecting column. Compared with the second embodiment, this method directly eliminates the threaded connection between the connecting piece 33 and the protrusion block 21. Specifically, when the beam 3 is installed into the interior of the box body 1 along the vertical direction, the semicircular groove 211 and the semicircular protrusion 323 are movably engaged to play a positioning and guiding role when the beam 3 is installed. At the same time, the connecting piece 33 on the bottom wall of the semicircular protrusion 323 can be directly inserted into the second locking hole 211a. The two do not need to be connected by threads, which can effectively limit the horizontal displacement of the beam 3 inside the box body 1. This structure not only effectively reduces the processing and manufacturing cost of the connecting piece 33 and the second locking hole 211a, but also realizes a quick and stable connection between the beam 3 and the front plate 2.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0055] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A battery pack box, characterized in that: comprising a front plate and a crossbeam arranged on the box body; A plurality of locking blocks are distributed on the front plate, and the locking blocks protrude along the interior of the box body and are arranged perpendicular to the front plate; The crossbeam is arranged in the box body, and a plurality of connecting blocks are distributed on the side wall of the crossbeam close to the front plate, each of the connecting blocks is arranged in a one-to-one correspondence with the locking block, and a locking piece is detachably connected to the connecting block, and the locking piece can be movably connected to the locking block along the normal direction of the front plate; The crossbeam can move closer to or farther away from the front plate due to a change in the position of the locking member connected to the locking block, so as to adjust the pre-tightening force applied by the crossbeam to the battery cell.

2. The battery pack box according to claim 1, characterized in that: The locking member includes a locking bolt and a nut. The locking bolt is arranged in the connecting block. A threaded hole is provided in the locking block. The end of the locking bolt is threadedly connected to the threaded hole, and the nut threadedly connected to the locking bolt is tightened against the connecting block to limit the movement of the crossbeam relative to the front plate within the box body.

3. The battery pack box according to claim 2, characterized in that: A clearance hole and a guide hole are coaxially arranged on the connecting block. The clearance hole and the guide hole are interconnected and arranged in a stepped manner. A T-shaped end is formed at the end of the locking bolt away from the front plate. The T-shaped end can be movably arranged in the clearance hole when the locking bolt passes through the guide hole.

4. A battery pack box, characterized in that: comprising a front plate and a crossbeam arranged on the box body; A plurality of protrusions are distributed on the front plate, and the protrusions face the interior of the box and are arranged perpendicular to the front plate; The crossbeam is arranged in the box body, and a plurality of positioning bosses are distributed on the side wall of the crossbeam close to the front plate, each positioning boss is arranged in a one-to-one correspondence with the protruding block, and a connecting piece is detachably connected to the positioning boss; When the positioning boss and the protruding block abut against each other, the connecting member can be connected to the protruding block along a direction perpendicular to the normal line of the front plate to fix the crossbeam in the box.

5. The battery pack case according to claim 4, characterized in that: The protruding block is provided with a first locking hole along the vertical direction, and the positioning boss is provided with a connecting hole. The connecting member can be connected to the first locking hole when the positioning boss is inserted into the protruding block.

6. The battery pack case according to claim 5, characterized in that: The positioning boss is also provided with a locking plane and a through hole, the locking plane is arranged in the horizontal direction, and the through hole is arranged in the vertical direction, and one end of the through hole is connected to the locking plane, and the other end is connected to the connecting hole, so that the connecting part can pass through the through hole and press against the locking plane.

7. The battery pack case according to claim 4, characterized in that: The raised block and the positioning boss are both cylindrical, and a semicircular groove is formed on the raised block, and a semicircular raised block is formed on the positioning boss. The semicircular raised block and the semicircular groove are arranged at the same height so that the semicircular raised block can be movably engaged in the semicircular groove when the crossbeam and the front plate are installed.

8. The battery pack box according to claim 7, characterized in that: A second locking hole arranged in the vertical direction is opened on the bottom wall of the semicircular groove, and the connecting piece is arranged on the bottom wall of the semicircular protrusion. The semicircular protrusion can be pressed tightly against the semicircular groove when the connecting piece is movably inserted into the second locking hole.

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