Long module fixing assembly and battery pack

Abstract

The present invention proposes a long module fixing assembly and a battery pack, wherein the long module fixing assembly includes a partition and a fixing part, the partition includes a partition body, a first wing plate and a second wing plate, the partition includes a partition body, a first wing plate and a second wing plate, the partition body is parallel to the end plate and is placed in the middle of the two end plates, the fixing part is sleeved on the two end plates, the first wing plate and the second wing plate, and is connected to the first wing plate and the second wing plate, the middle part of the fixing part is subjected to force together with the first wing plate and the second wing plate, so as to avoid the middle part of the fixing part being broken due to excessive force, causing the entire module to loosen, thereby improving the stability of the battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a long module fixing assembly and a battery pack. Background Art

[0002] Generally speaking, the battery packs used in electric vehicles are assembled from cells into modules, which are then installed within the battery pack, forming a three-stage assembly model: battery-module-battery pack. The battery-to-pack (CTP) approach, also known as cell-to-pack (CTP), integrates the cells directly into the battery pack, eliminating the intermediate module structure, simplifying the battery pack structure, and improving space utilization.

[0003] Currently, there are two CTP technology approaches: one is completely module-free, still in the exploratory stage; the other, replacing small modules with large modules, is the more widely used technology. Large modules replace the previous small modules, connected with cable ties, increasing the number of batteries contained in a single module and reducing the total number of modules. The most commonly used large module replacement technology is the long module. During hoisting, the long module's length makes the central area of ​​the entire module prone to failure and bending deformation, and in severe cases, the entire module can become loose. During use, the entire module is subject to long-term vibration in various directions, which can cause it to become loose.

[0004] To address the above issues, a Chinese utility model patent with publication number CN 217956001 U in the prior art discloses an extra-long module for container-type energy storage. Load-bearing bars are welded between two end plates and the bottoms of multiple isolation plates. The bars support the battery cells during module installation, providing overall support stability and facilitating installation into the container. Two metal and one plastic cable ties are wrapped around the outside of the module to secure it. However, in this solution, a single cable tie wraps around the outer layer of the module. Due to the module's long length, the battery cells in the middle are prone to loosening, potentially causing poor contact between the connecting bars and affecting the stability of the battery pack. Summary of the Invention

[0005] In view of this, the present invention proposes a long module fixing assembly, in which the middle part of the fixing part is subjected to force together with the first wing plate and the second wing plate, so as to prevent the middle part of the cable tie from breaking due to excessive force, causing the entire module to loosen, thereby improving the stability of the battery pack.

[0006] The technical solution of the present invention is achieved as follows:

[0007] In a first aspect, the present invention provides a long module fixing assembly for fixing a long module, wherein the long module includes a plurality of battery cells and at least two end plates, wherein the plurality of battery cells are located between the at least two end plates, and includes a partition and a fixing member, wherein the partition includes a partition body, a first wing plate, and a second wing plate, and the fixing member is used to fix the plurality of end plates, the plurality of battery cells, and the partition together, wherein:

[0008] The partition body is parallel to the end plates and is placed in the middle of the two end plates at both ends;

[0009] The first wing plate and the second wing plate are respectively located at two ends of the separator body and vertically connected to the separator body. One side of the first wing plate and the second wing plate close to the separator body is adhered to the battery cell.

[0010] On the basis of the above technical solution, preferably, the fixing member is a cable tie, and the fixing member is externally mounted on the two end plates, the first wing plate and the second wing plate, and is connected to the first wing plate and the second wing plate.

[0011] Based on the above technical solution, preferably, the fixing member includes a first cable tie and a second cable tie, the first cable tie and the second cable tie are respectively U-shaped, the first cable tie is respectively connected to the first wing plate and the second wing plate, and the second cable tie is respectively connected to the first wing plate and the second wing plate.

[0012] On the basis of the above technical solution, preferably, it further comprises at least four connecting bolts;

[0013] The first wing plate is provided with a first threaded hole and a second threaded hole along the length direction respectively;

[0014] The second wing plate is provided with a third threaded hole and a fourth threaded hole along the length direction respectively;

[0015] A first connecting hole and a second connecting hole are respectively provided at both ends of the first cable tie, one connecting bolt passes through the first connecting hole and cooperates with the first threaded hole, and one connecting bolt passes through the second connecting hole and cooperates with the third threaded hole, and the first connecting hole and the second connecting hole are waist-shaped holes;

[0016] A third connecting hole and a fourth connecting hole are respectively provided at both ends of the second cable tie. One connecting bolt passes through the third connecting hole and cooperates with the second threaded hole, and one connecting bolt passes through the fourth connecting hole and cooperates with the fourth threaded hole. The third connecting hole and the fourth connecting hole are waist-shaped holes.

[0017] Based on the above technical solution, preferably, two first cable ties are provided, and the two first cable ties are respectively provided at the upper and lower parts of the end plate; two second cable ties are provided, and the two second cable ties are respectively provided at the upper and lower parts of the end plate.

[0018] Based on the above technical solution, preferably, the first cable tie and the second cable tie are located on the same horizontal line.

[0019] On the basis of the above technical solution, preferably, the partition body, the first wing plate and the second wing plate form an "I" shape.

[0020] On the basis of the above technical solution, preferably, the thickness of the first wing panel and the second wing panel gradually decreases from the middle to both sides along the length direction.

[0021] On the basis of the above technical solution, preferably, mounting holes are respectively provided at both ends of the partition body.

[0022] In the second aspect, the present invention proposes a battery pack, comprising a battery box, a long module and the long module fixing assembly; the long module comprises a plurality of battery cells and two end plates, the plurality of battery cells are located between the two end plates; the partition body comprises a mounting hole connected to the battery box; the fixing member is sheathed on the two end plates.

[0023] The long module fixing assembly of the present invention has the following advantages over the prior art:

[0024] (1) The partition body is placed between the two end plates, and the first wing plate and the second wing plate are adhered to the battery cell on one side close to the partition body, so that the battery cell in the middle part can be adhered and fixed, so that the battery cell of the long module is fixed more firmly, avoiding the poor contact of the connection row caused by the loosening of the battery cell in the middle part, and improving the stability of the battery pack;

[0025] (2) The fixing member includes a first strap and a second strap, and the first strap and the second strap are U-shaped. The fixing member is designed in this segment, and the length of the first strap and the second strap is reduced, so as to avoid the strap being too long and causing the middle part to be broken due to greater force, thereby improving the stability of the battery pack;

[0026] (3) The partition includes a partition body, a first wing plate, and a second wing plate. The partition body is parallel to the end plate and is placed in the middle of the two end plates at both ends. The fixing member is sleeved on the two end plates, the first wing plate, and the second wing plate, and is connected to the first wing plate and the second wing plate. The middle part of the fixing member is stressed together with the first wing plate and the second wing plate, thereby preventing the middle part of the fixing member from being broken due to excessive force, causing the entire module to loosen, thereby improving the stability of the battery pack.

[0027] (4) The first connecting hole and the second connecting hole are waist-shaped holes, and the third connecting hole and the fourth connecting hole are waist-shaped holes. The waist-shaped holes are used to connect the first and second cable ties to the first and second wing plates, thereby avoiding the problem that the long module is too long and causes the first and second cable ties to be unable to be assembled or to be too loose;

[0028] (5) Mounting holes are provided at both ends of the partition body, and the partition body is connected to the battery box through the mounting holes, so that the connection between the long module and the battery box is more stable, and the risk of the long module falling off due to long-term vibration in different directions during use is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A top view of the long module fixing assembly of the present invention;

[0031] Figure 2 A three-dimensional diagram of the long module fixing assembly of the present invention with the battery core removed;

[0032] Figure 3 The three-dimensional structure of the partition of the present invention Figure 1 ;

[0033] Figure 4 The three-dimensional structure of the partition of the present invention Figure 2 ;

[0034] Figure 5 is a perspective view of a first cable tie of the present invention;

[0035] Figure 6 It is a perspective view of a second cable tie of the present invention.

[0036] In the above drawings, 100-long module, 101-battery cell, 102-end plate; 1-partition, 11-partition body, 111-mounting hole, 12-first wing plate, 121-first threaded hole, 122-second threaded hole, 13-second wing plate, 131-third threaded hole, 132-fourth threaded hole; 2-fixing part, 21-first cable tie, 211-first connecting hole, 212-second connecting hole, 22-second cable tie, 221-third connecting hole, 222-fourth connecting hole. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Reference Figures 1-6 As shown, an embodiment of the present invention provides a long module fixing assembly for fixing a long module 100, wherein the long module 100 includes a plurality of battery cells 101 and at least two end plates 102, wherein the plurality of battery cells 101 are located between the two end plates 102, and includes a partition 1 and a fixing member 2, wherein the partition 1 includes a partition body 11, a first wing plate 12, and a second wing plate 13, and the fixing member 2 is used to fix the plurality of end plates 102, the plurality of battery cells 101, and the partition 1 together, wherein:

[0039] The partition body 11 is parallel to the end plates 102 and is placed in the middle of the two end plates 102 at both ends;

[0040] The first wing plate 12 and the second wing plate 13 are respectively located at two ends of the separator body 11 and vertically connected to the separator body 11 . One side of the first wing plate 12 and the second wing plate 13 close to the separator body 11 is adhered to the battery cell 101 .

[0041] The long module fixing assembly proposed in an embodiment of the present invention is placed in the middle of the two end plates 102 at both ends through the partition body 11, and the first wing plate 12 and the second wing plate 13 are adhered to the battery cell 101 on one side close to the partition body 11, so that the battery cell 101 in the middle part can be adhered and fixed, so that the battery cell 101 of the long module is fixed more firmly, avoiding poor contact of the connecting row caused by loosening of the battery cell 101 in the middle part, and improving the stability of the battery pack.

[0042] In one embodiment, the long module fixing assembly further includes a fixing member 2, which is externally mounted on the two end plates 102, the first wing plate 12, and the second wing plate 13, and is connected to the first wing plate 12 and the second wing plate 13. By connecting the fixing member 2 to the first wing plate 12 and the second wing plate 13, the first wing plate 12 and the second wing plate 13 can secure the fixing member 2.

[0043] In one embodiment, Figure 1 and Figure 2The fixing member 2 includes a first strap 21 and a second strap 22, each of which is U-shaped. The first strap 21 is connected to the first wing panel 12 and the second wing panel 13, respectively, and the second strap 22 is connected to the first wing panel 12 and the second wing panel 13, respectively. By configuring the fixing member 2 to include the first strap 21 and the second strap 22, each of which is U-shaped, and designing the fixing member 2 in this segment, the length of the first strap 21 and the second strap 22 is reduced, preventing the straps from being too long and causing the middle portion to be subjected to greater force and break, thereby improving the stability of the battery pack.

[0044] In one embodiment, the first wing plate 12 and the second wing plate 13 are bonded to the battery cells 101 on the side closest to the separator body 11. By bonding the first wing plate 12 and the second wing plate 13 to the battery cells 101 on the side closest to the separator body 11, the bonded battery cells 101 can be secured, making the battery cells 101 of the long module 100 more securely fixed, preventing failure and bending deformation in the middle region of the entire module, and reducing the risk of the long module 100 falling off during installation.

[0045] In one embodiment, referring to Figure 2-6 As shown, the long module fixing assembly also includes at least four connecting bolts (not shown in the figure);

[0046] like Figure 4 As shown, the first wing plate 12 is provided with a first threaded hole 121 and a second threaded hole 122 along the length direction;

[0047] As shown in FIG3 , the second wing plate 13 is provided with a third threaded hole 131 and a fourth threaded hole 132 along the length direction;

[0048] like Figure 5 As shown, a first connecting hole 211 and a second connecting hole 212 are respectively provided at both ends of the first cable tie 21, one connecting bolt passes through the first connecting hole 211 and cooperates with the first threaded hole 121, and one connecting bolt passes through the second connecting hole 212 and cooperates with the third threaded hole 131, and the first connecting hole 211 and the second connecting hole 212 are waist-shaped holes;

[0049] like Figure 6 As shown, a third connecting hole 221 and a fourth connecting hole 222 are respectively provided at both ends of the second cable tie 22, one connecting bolt passes through the third connecting hole 221 and cooperates with the second threaded hole 122, and one connecting bolt passes through the fourth connecting hole 222 and cooperates with the fourth threaded hole 132, and the third connecting hole 221 and the fourth connecting hole 222 are waist-shaped holes.

[0050] In this embodiment, the first connecting hole 211 and the second connecting hole 212 are waist-shaped holes, and the third connecting hole 221 and the fourth connecting hole 222 are waist-shaped holes. The waist-shaped holes are used to connect the first and second cable ties 21 and 22 to the first and second wing plates 12 and 13. The fixed positions of the first and second cable ties 21 and 22 can be flexibly adjusted to avoid the problem that the long module 100 is too long and causes the first and second cable ties 21 and 22 to be unable to be assembled or are too loose.

[0051] In one embodiment, Figure 2 As shown, two first cable ties 21 are provided, and the two first cable ties 21 are respectively provided at the upper and lower portions of the end plate 102; two second cable ties 22 are provided, and the two second cable ties 22 are respectively provided at the upper and lower portions of the end plate 102. By respectively providing the two first cable ties 21 at the upper and lower portions of the end plate 102, and the two second cable ties 22 at the upper and lower portions of the end plate 102, the upper and lower portions of the end plate 102 are fixed. Compared to the method of fixing the entire end plate 102 with a set of cable ties, the fixing effect can be improved, making the long module 100 more secure and stable, and improving the stability of the battery pack.

[0052] In a further embodiment, Figure 2 As shown, the first and second tie ties 21, 22 are located on the same horizontal line. By arranging the first and second tie ties 21, 22 on the same horizontal line, the two ends of the long module 100 are fixed symmetrically, so that the force on the long module 100 is evenly distributed by the first and second tie ties 21, 22 on both sides. Together, the two tie ties effectively secure the entire long module 100, improving the stability of the battery pack.

[0053] In one embodiment, Figure 3 As shown, the separator body 11, the first wing plate 12, and the second wing plate 13 form an "I" shape. This "I" shape provides greater structural strength, providing a stable connection foundation for the first and second cable ties 21, 22, thereby increasing the strength of the entire fixing assembly and improving the stability of the battery pack.

[0054] In one embodiment, Figure 3As shown, the thickness of the first wing plate 12 and the second wing plate 13 gradually decreases from the middle to the sides along the length direction. By setting the thickness of the first wing plate 12 and the second wing plate 13 gradually decreasing from the middle to the sides along the length direction, the first and second cable ties 21 and 22 can be separated from the sides of the battery cell 101, allowing the first and second cable ties 21 and 22 to be tensioned and straightened, thereby improving the fixing ability of the first and second cable ties 21 and 22, achieving a better fixing effect of the fixing assembly and improving the stability of the battery pack.

[0055] In one embodiment, Figure 3 As shown, mounting holes 111 are provided at both ends of the partition body 11. The mounting holes 111 are used to connect and secure the long module 100 to the battery box of the battery pack, making the connection between the long module 100 and the battery box more stable and reducing the risk of the long module 100 coming loose due to long-term vibration in different directions during use.

[0056] The working principle of the long module fixing assembly is as follows: the first cable tie 21 and the second cable tie 22 are externally mounted on the two end plates 102, the first wing plate 12 and the second wing plate 13. After the first cable tie 21 and the second cable tie 22 are tightened, they are fixed to the first wing plate 12 and the second wing plate 13 by connecting bolts. The first cable tie 21 and the second cable tie 22 are subjected to force together with the first wing plate 12 and the second wing plate 13 located in the middle of the long module 100, thereby preventing the middle part of the fixing member 2 from breaking due to excessive force, causing the entire module to loosen, thereby improving the stability of the battery pack.

[0057] Based on the same inventive concept, an embodiment of the present invention also proposes a battery pack, including a battery box, a long module 100 and the long module fixing assembly; the long module 100 includes a plurality of battery cells 101 and two end plates 102, and the plurality of battery cells 101 are located between the two end plates 102; the partition body 11 includes a mounting hole 111 connected to the battery box; the fixing part 2 is sheathed on the two end plates 102.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A long module fixing assembly for fixing a long module (100), wherein the long module (100) comprises a plurality of battery cells (101) and at least two end plates (102), wherein the plurality of battery cells (101) are located between the at least two end plates (102), and wherein: The invention comprises a partition (1) and a fixing member (2), wherein the partition (1) comprises a partition body (11), a first wing plate (12) and a second wing plate (13), and the fixing member (2) is used to fix the plurality of end plates (102), the plurality of battery cells (101) and the partition (1) together, wherein: The partition body (11) is parallel to the end plates (102) and is placed in the middle of the two end plates (102) at both ends; The first wing plate (12) and the second wing plate (13) are respectively located at two ends of the partition body (11) and are vertically connected to the partition body (11); the first wing plate (12) and the second wing plate (13) are adhered to the battery cell (101) on one side close to the partition body (11); the thickness of the first wing plate (12) and the second wing plate (13) gradually decreases from the middle to both sides along the length direction; The fixing member (2) comprises a first cable tie (21) and a second cable tie (22), wherein the first cable tie (21) and the second cable tie (22) are U-shaped and are respectively fitted over the two end plates (102), the first cable tie (21) is respectively connected to the first wing plate (12) and the second wing plate (13), and the second cable tie (22) is respectively connected to the first wing plate (12) and the second wing plate (13).

2. The long module fixing assembly according to claim 1, wherein: Also includes at least four connecting bolts; The first wing plate (12) is provided with a first threaded hole (121) and a second threaded hole (122) along the length direction respectively; The second wing plate (13) is provided with a third threaded hole (131) and a fourth threaded hole (132) along the length direction respectively; A first connecting hole (211) and a second connecting hole (212) are respectively provided at both ends of the first connecting tie (21), one connecting bolt passes through the first connecting hole (211) and cooperates with the first threaded hole (121), and one connecting bolt passes through the second connecting hole (212) and cooperates with the third threaded hole (131), and the first connecting hole (211) and the second connecting hole (212) are waist-shaped holes; A third connecting hole (221) and a fourth connecting hole (222) are respectively provided at both ends of the second cable tie (22); one connecting bolt passes through the third connecting hole (221) and cooperates with the second threaded hole (122); and one connecting bolt passes through the fourth connecting hole (222) and cooperates with the fourth threaded hole (132); the third connecting hole (221) and the fourth connecting hole (222) are waist-shaped holes.

3. The long module fixing assembly according to claim 2, wherein: Two first cable ties (21) are provided, and the two first cable ties (21) are respectively provided at the upper part and the lower part of the end plate (102); two second cable ties (22) are provided, and the two second cable ties (22) are respectively provided at the upper part and the lower part of the end plate (102).

4. The long module fixing assembly according to claim 3, wherein: The first cable tie (21) and the second cable tie (22) are located on the same horizontal line.

5. The long module fixing assembly according to claim 4, characterized in that: The partition body (11), the first wing plate (12) and the second wing plate (13) form an "I" shape.

6. The long module fixing assembly according to claim 5, wherein: Mounting holes (111) are respectively provided at both ends of the partition body (11).

7. A battery pack, characterized in that: The invention comprises a battery box, a long module (100) and a long module fixing assembly according to any one of claims 1 to 6; the long module (100) comprises a plurality of battery cells (101) and two end plates (102), and the plurality of battery cells (101) are located between the two end plates (102); the partition body (11) comprises a mounting hole (111) connected to the battery box; and the fixing member (2) is sheathed on the two end plates (102).

Images