Support fixing assembly and battery module

Abstract

A support fixing assembly and a battery module. The support fixing assembly comprises a support (1) and a module upper cover (2). One of the support (1) and the module upper cover (2) is provided with positioning protrusions (11), the other one of the support (1) and the module upper cover (2) is provided with positioning slots (21), and the positioning protrusions (11) are inserted into the positioning slots (21); and one of the support (1) and the module upper cover (2) is provided with snaps (3) at least at two opposite sides, and the support (1) is connected to the module upper cover (2) by means of the snaps (3).

Description

Bracket fixing components and battery module

[0001] This application claims priority to Chinese Patent Application No. 202420895497.7, filed with the Chinese Patent Office on April 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a bracket fixing component and a battery module. Background Technology

[0003] The CCS (Cell Connection System) module in a power battery is the core component of the battery safety monitoring center, playing a crucial role in the safety performance of the power battery. The CCS module includes a CCS bracket, busbar, and data acquisition harness. The CCS bracket connects to the top cover of the battery module to fix the position of the CCS module, ensuring its stability and safety during impacts or vibrations to the battery module. It accurately acquires voltage and temperature signals from the internal cells, guaranteeing the safe operation of the battery module.

[0004] In related technologies, the CCS bracket and the module cover are usually fixed by riveting or by inserting pins and grooves. Invention Overview

[0005] Using riveting to fix the CCS bracket and top cover is difficult to manufacture and fix, and the process is relatively complex. Fixing the CCS bracket and top cover by inserting pins and grooves is not stable enough. For example, when the vehicle is in motion, the battery module vibrates constantly, and the impact on the battery module is even greater when the road conditions are poor. The insertion pins and grooves cannot stably fix the CCS bracket and top cover, causing the CCS bracket to move around. This affects the acquisition of voltage and temperature signals by the acquisition harness on the CCS bracket, and the operational safety and reliability of the battery module cannot be guaranteed.

[0006] This application provides a bracket fixing assembly. The bracket fixing assembly includes a bracket and a module cover; one of the bracket and the module cover is provided with a positioning protrusion, and the other of the bracket and the module cover is provided with a positioning groove, and the positioning protrusion is inserted into the positioning groove; one of the bracket and the module cover is provided with a buckle on at least two opposite sides, and the bracket is connected to the module cover by the buckle.

[0007] This application also provides a battery module. The battery module includes battery cells and the aforementioned bracket fixing assembly. A bus assembly is provided on the side of the bracket facing the top cover of the module. Multiple battery cells are provided, and the bus assembly is electrically connected to the multiple battery cells. Beneficial effects

[0008] The bracket fixing assembly provided in this application has two advantages. First, the bracket is connected to the module cover via positioning protrusions and positioning grooves, which limits the bracket's movement relative to the module cover in the direction parallel to the module cover (i.e., the length and width direction of the bracket). Second, the bracket and the module cover are locked together at least on opposite sides by snap-fit ​​fasteners, which improves the connection strength between the bracket and the module cover and limits the bracket's movement relative to the module cover in its thickness direction. That is, the movement of the bracket is restricted in both the length and width direction and the thickness direction, thereby ensuring the stability of the CCS module in the battery module, preventing excessive pulling of the wiring harness on the bracket due to the bracket's movement, which would affect the acquisition of voltage and temperature signals, and ensuring the safe and reliable operation of the battery module.

[0009] The battery module provided in this application adopts the aforementioned bracket fixing component, and a busbar component is provided on the side of the bracket facing the module cover. Multiple battery cells are provided, and the busbar component is electrically connected to the multiple battery cells to ensure the stability of the CCS component in the battery module, avoid excessive pulling of the wiring harness on the bracket due to the bracket movement, which would affect the acquisition of voltage and temperature signals, and ensure the safe and reliable operation of the battery module. Attached Figure Description

[0010] Figure 1 is an isometric view of the bracket fixing assembly provided in a possible implementation of this application.

[0011] Figure 2 is a first exploded view of the bracket fixing assembly provided in a possible implementation of this application.

[0012] Figure 3 is a second exploded view of the bracket fixing assembly provided in a possible implementation of this application.

[0013] Figure 4 is a side view of the bracket fixing assembly provided in a possible implementation of this application.

[0014] Figure 5 is a magnified view of part A in Figure 4.

[0015] Figure 6 is a schematic diagram of the snap-fit ​​and bracket engagement structure provided by a possible implementation of this application.

[0016] Figure 7 is a schematic diagram of the insertion of the bracket and module cover provided in a possible implementation of this application.

[0017] Figure 8 is a partial view of Figure 7.

[0018] Figure 9 is a top view of the bracket fixing assembly provided in a possible implementation of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Bracket; 2. Module cover; 3. Clip; 4. Busbar; 5. Double-sided adhesive; 6. Connecting plate;

[0021] 11. Positioning protrusion; 12. Recessed groove; 13. Pressure relief hole; 111. Limiting protrusion; 112. First rounded corner; 121. Third rounded corner; 21. Positioning groove; 22. Protrusion structure; 211. Limiting groove; 212. Second rounded corner; 221. First thickened part; 222. Fourth rounded corner; 31. First clamping plate; 32. Second clamping plate; 33. Cantilever; 34. Hook. Embodiments of the present invention

[0022] In the description of this application, unless otherwise expressly 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 application according to the specific circumstances.

[0023] In this application, unless otherwise expressly 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 being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used 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 application. Furthermore, the terms "first" and "second" are used for descriptive distinction and have no special meaning.

[0025] As shown in Figures 1, 2, and 3, this embodiment provides a bracket fixing assembly, including a bracket 1 and a module cover 2. The bracket 1 can be the bracket 1 of the CCS module, and the module cover 2 is the top cover plate of the battery module. This bracket fixing assembly can improve the connection strength between the bracket 1 and the module cover 2, ensure the stability of the CCS module in the battery module, and guarantee the safe operation of the battery module.

[0026] Specifically, referring to Figures 1 to 3, the bracket 1 is provided with a positioning protrusion 11, and the module cover 2 is provided with a positioning groove 21, with the positioning protrusion 11 inserted into the positioning groove 21; both the module cover 2 and the bracket 1 have mutually perpendicular length and width directions, and the module cover 2 is provided with buckles 3 on both sides opposite to each other along the width direction, and the buckles 3 on both sides engage with the corresponding sides of the bracket 1.

[0027] In the bracket fixing assembly provided in this embodiment, on the one hand, the bracket 1 and the module cover 2 are connected by a positioning protrusion 11 and a positioning groove 21, which can limit the bracket 1 from moving relative to the module cover 2 in the direction parallel to the module cover 2 (i.e., the length and width direction of the bracket 1). On the other hand, the bracket 1 and the module cover 2 are fixed by a snap-fit ​​3 at least on opposite sides, which improves the connection strength between the bracket 1 and the module cover 2 and can limit the movement of the bracket 1 relative to the module cover 2 in its thickness direction. That is, the movement of the bracket 1 is restricted in both the length and width direction and the thickness direction of the bracket 1, thereby ensuring the stability of the CCS component in the battery module, avoiding excessive pulling of the wiring harness on the bracket 1 due to the movement of the bracket 1, which would affect the acquisition of voltage and temperature signals, and ensuring the safe and reliable operation of the battery module.

[0028] The side of the bracket 1 facing away from the module cover 2 is configured to arrange the battery cells. In this embodiment, since the positioning protrusion 11 protrudes from the bracket 1 in the direction facing the module cover 2, it is not easy to interfere with the battery cells below the bracket 1.

[0029] It is understandable that buckles 3 can also be arranged on the other two sides of the module cover 2 to engage with the corresponding side of the bracket 1.

[0030] Of course, in other embodiments, positioning protrusions 11 can be provided on the module cover 2, and positioning grooves 21 can be provided on the bracket 1, which can also achieve the insertion of the bracket 1 and the module cover 2. Similarly, buckles 3 can be provided on at least two opposite sides of the bracket 1, and the buckles 3 on both sides can engage with the corresponding sides of the module cover 2.

[0031] Optionally, the positioning protrusion 11 and the positioning groove 21 are interference fits, with an interference amount of 0.3mm to 1mm, such as 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc. The interference fit between the positioning protrusion 11 and the positioning groove 21 ensures that the two are tightly inserted, effectively limiting the relative movement of the bracket 1.

[0032] In some embodiments, referring to Figures 4 and 5, the latch 3 includes a first latching plate 31 and a second latching plate 32 connected at an angle, both extending along the side of the module cover 2. The end of the first latching plate 31 away from the second latching plate 32 is bent and connected to one of the bracket 1 and the module cover 2, and the second latching plate 32 is hooked onto the other of the bracket 1 and the module cover 2.

[0033] For example, referring to Figures 3, 4, and 5, the end of the first latching plate 31 away from the second latching plate 32 is bent and connected to the module cover 2. The second latching plate 32 is hooked onto the side of the bracket 1 facing away from the module cover 2. The first latching plate 31 can contact the side of the battery module housing to ensure the sealing of the battery module. The first latching plate 31 is connected to the long side of the module cover 2, and both the first latching plate 31 and the second latching plate 32 extend from one end of the module cover 2 to the other end, ensuring that they can hook onto the bracket 1 along the entire length direction, improving the connection strength between the module cover 2 and the bracket 1, and preventing loosening.

[0034] Alternatively, the end of the first latching plate 31 furthest from the second latching plate 32 can be bent and connected to the bracket 1, and the second latching plate 32 can be hooked onto the side of the module cover 2 facing away from the bracket 1, which can also achieve the snap-fit ​​connection between the module cover 2 and the bracket 1. Optionally, the first latching plate 31 is connected to the length side of the bracket 1, and both the first latching plate 31 and the second latching plate 32 extend from one end of the bracket 1 to the other end, ensuring that the bracket 1 and the module cover 2 have high connection strength throughout the entire length direction, and preventing them from separating.

[0035] In this embodiment, the first card plate 31, the second card plate 32 and the module cover 2 are integrally formed, for example by vacuum forming. After forming, the first card plate 31 can elastically deform relative to the module cover 2 in order to realize the hook card bracket 1.

[0036] In a new embodiment, a plurality of latches 3 are spaced apart on one side of the bracket 1 or the module cover 2, as shown in Figure 6. Each latch 3 includes a connected cantilever 33 and a hook 34. The spaced-apart latches 3 ensure the connection strength between the bracket 1 and the module cover 2 while reducing material usage and lowering costs. The end of the cantilever 33 away from the hook 34 is connected to one of the bracket 1 and the module cover 2, and the hook 34 is engaged with the other of the bracket 1 and the module cover 2.

[0037] For example, cantilever 33 is connected to module cover 2, and the side of cantilever 33 is on the same plane as the end face of module cover 2. Hook 34 is hooked onto the side of bracket 1 facing away from module cover 2. During the hooking process between hook 34 and bracket 1, cantilever 33 elastically deforms and returns to its original shape after hooking. Alternatively, cantilever 33 can also be connected to bracket 1, and hook 34 can be hooked onto module cover 2.

[0038] For example, the cantilever 33, the hook 34 and the module cover 2 are integrally formed, for example by vacuum forming. The formed cantilever 33 can elastically deform relative to the module cover 2 in order to realize the hook bracket 1.

[0039] Optionally, the positioning protrusion 11 is integrally formed on the bracket 1, and a recessed groove 12 is formed on the side of the positioning protrusion 11 facing away from the module cover 2; a convex bulge structure 22 is integrally formed on the side of the module cover 2 facing away from the bracket 1, and a positioning groove 21 is formed on the side of the convex bulge structure 22 facing the bracket 1. That is, the positioning protrusion 11 is recessed and formed on the bracket 1 at the corresponding position, and the recessed groove 12 is formed on the back of the positioning protrusion 11; the convex bulge structure 22 is recessed and formed on the corresponding position of the module cover 2, and the positioning groove 21 is formed on the back of the convex bulge structure 22. For example, the positioning protrusion 11 is formed on the bracket 1 by vacuum forming process, and the positioning groove 21 is formed on the module cover 2 by vacuum forming process, which has high forming efficiency and does not require additional or reduced materials.

[0040] Referring to Figures 7 and 8, the bracket 1 is inserted into the module cover 2 along the insertion direction a indicated by the arrow in the figures until the positioning protrusion 11 and the positioning groove 21 are inserted into place. Optionally, the outer wall of the positioning protrusion 11 is provided with a limiting protrusion 111, and the inner wall of the positioning groove 21 is recessed with a limiting groove 211. The limiting protrusion 111 is engaged in the limiting groove 211, which can limit the movement of the bracket 1 relative to the module cover 2 along its own thickness direction, further improving the stability of the positioning protrusion 11 and the positioning groove 21 after insertion.

[0041] Referring to Figure 8, since the limiting groove 211 is opened on the inner wall of the positioning groove 21, it will reduce the wall thickness of the convex structure 22. Therefore, a first thickened part 221 is provided on the outer wall of the convex structure 22. The first thickened part 221 is arranged opposite to the limiting groove 211 to compensate for the loss of strength of the convex structure 22 due to the opening of the limiting groove 211, and to prevent the wall surface of the convex structure 22 from being crushed due to the tight fit.

[0042] For example, the limiting protrusion 111 is circumferentially disposed on the outer wall of the positioning protrusion 11, and the limiting groove 211 is circumferentially disposed on the inner wall of the positioning groove 21, ensuring that the positioning protrusion 11 and the positioning groove 21 are firmly inserted in the entire circumferential direction. The first thickened part 221 is circumferentially disposed on the outer wall of the protrusion structure 22 and is directly opposite to the annular limiting groove 211.

[0043] Alternatively, a limiting groove 211 can be provided on the outer wall of the positioning protrusion 11, and a limiting protrusion 111 can be provided on the inner wall of the positioning groove 21. This can also strengthen the connection between the positioning protrusion 11 and the positioning groove 21. In this case, since the limiting groove 211 is opened on the outer wall of the positioning protrusion 11, it will reduce the wall thickness of the positioning protrusion 11. Therefore, a second thickened part is provided on the inner wall of the recessed groove 12. The second thickened part is arranged opposite to the limiting groove 211 to compensate for the loss of strength of the positioning protrusion 11 due to the opening of the limiting groove 211, and to prevent the positioning protrusion 11 from being deformed due to compression when inserted into the positioning groove 21.

[0044] As shown in Figures 1, 2, and 9, multiple positioning protrusions 11 and positioning grooves 21 are provided. These protrusions 11 and grooves 21 are inserted into each other in a one-to-one correspondence, improving the installation stability between the bracket 1 and the module cover 2. The multiple positioning protrusions 11 are asymmetrically distributed relative to at least one centerline of the bracket 1, so that they constitute a foolproof assembly, preventing incorrect installation orientation of the bracket 1 relative to the module cover 2.

[0045] The distribution of the positioning protrusions 11 on the bracket 1 is the same as the distribution of the positioning grooves 21 (convex hull structures 22) on the module cover 2. For example, referring to FIG9, the multiple convex hull structures 22 are asymmetrically distributed relative to the center line of the module cover 2 along the length direction (i.e., the left-right direction in FIG9). When the module cover 2 and the bracket 1 are installed in reverse order, the multiple positioning protrusions 11 cannot be inserted into the multiple positioning grooves 21 in a one-to-one correspondence.

[0046] Referring to Figure 8, the cross-sectional area of ​​the positioning protrusion 11 and the cross-sectional area of ​​the positioning groove 21 gradually decrease along the insertion direction a. When the positioning protrusion 11 is inserted into the positioning groove 21, it has a certain fault tolerance, making the insertion smoother. Even if there is a slight deviation between the positioning protrusion 11 and the positioning groove 21, they can still be inserted smoothly into place.

[0047] Referring again to Figure 8, the top and bottom of the positioning protrusion 11 are both provided with a first rounded corner 112, and the opening and bottom of the positioning groove 21 are both provided with a second rounded corner 212. The bottom and opening of the recessed groove 12 are both provided with a third rounded corner 121, and the top and bottom of the convex bulge structure 22 are both provided with a fourth rounded corner 222. This arrangement makes the overall wall thickness of the positioning protrusion 11 and the convex bulge structure 22 more uniform, avoiding stress concentration at the top and bottom positions.

[0048] This embodiment also provides a battery module, including battery cells and the aforementioned bracket fixing assembly. Referring to Figures 2 and 3, a busbar assembly is provided on the side of the bracket 1 facing the module cover 2 of the bracket fixing assembly. Multiple battery cells are provided, and the busbar assembly includes multiple busbars 4, which are electrically connected to the multiple battery cells to output electrical signals. Specifically, the busbars 4 are firmly and securely attached to the bracket 1 using double-sided adhesive 5, ensuring stable installation and quick setup. Two connecting plates 6 are provided on the busbar assembly, allowing the battery module to be connected to other battery modules or its signals to be routed to the battery management system.

[0049] Each battery cell is provided with a pressure relief hole 13 on the bracket 1, and the pressure relief hole 13 is directly opposite the pressure relief valve on the battery cell cover plate.

Claims

1. A bracket fixing assembly, comprising a bracket (1) and a module cover (2); One of the bracket (1) and the module cover (2) is provided with a positioning protrusion (11), and the other of the bracket (1) and the module cover (2) is provided with a positioning groove (21). The positioning protrusion (11) is inserted into the positioning groove (21). One of the bracket (1) and the module cover (2) is provided with buckles (3) on at least two opposite sides, and the bracket (1) and the module cover (2) are connected by the buckles (3).

2. The bracket fixing assembly according to claim 1, wherein, The buckle (3) includes a first clip plate (31) and a second clip plate (32) connected at an angle, and both the first clip plate (31) and the second clip plate (32) extend along the side of the module cover (2); The first card (31) is bent and connected to one of the bracket (1) and the module cover (2) at the end away from the second card (32), and the second card (32) is hooked to the other of the bracket (1) and the module cover (2).

3. The bracket fixing assembly according to claim 1 or 2, wherein, The bracket (1) or the module cover (2) is provided with a plurality of buckles (3) at intervals on one side, and the buckles (3) include connected cantilever (33) and hook (34). One end of the cantilever (33) away from the hook (34) is connected to one of the bracket (1) and the module cover (2), and the hook (34) is hooked to the other of the bracket (1) and the module cover (2).

4. The bracket fixing assembly according to any one of claims 1-3, wherein, The positioning protrusion (11) is integrally disposed on the bracket (1), and the positioning protrusion (11) surrounds the recessed groove (12) on the side facing away from the module cover (2); the module cover (2) is integrally provided with a protruding bulge structure (22) on the side facing away from the bracket (1), and the protruding bulge structure (22) surrounds the positioning groove (21) on the side facing the bracket (1).

5. The bracket fixing assembly according to claim 4, wherein, A limiting protrusion (111) is provided on one of the outer wall of the positioning protrusion (11) and the inner wall of the positioning groove (21), and a limiting groove (211) is provided on the other of the outer wall of the positioning protrusion (11) and the inner wall of the positioning groove (21), and the limiting protrusion (111) is engaged in the limiting groove (211).

6. The bracket fixing assembly according to claim 5, wherein, The limiting slot (211) is formed on the inner wall of the positioning groove (21), and the outer wall of the convex structure (22) is provided with a first thickened part (221), which is directly opposite to the limiting slot (211); Alternatively, the limiting slot (211) is formed on the outer wall of the positioning protrusion (11), and the inner wall of the recessed groove (12) is provided with a second thickened part, which is positioned opposite to the limiting slot (211).

7. The bracket fixing assembly according to any one of claims 1-6, wherein, The positioning protrusions (11) and the positioning grooves (21) are provided in multiple ways, and the multiple positioning protrusions (11) and the multiple positioning grooves (21) are inserted into each other in a one-to-one correspondence; the multiple positioning protrusions (11) are asymmetrically distributed relative to at least one center line of the bracket (1).

8. The bracket fixing assembly according to any one of claims 1-6, wherein, The cross-sectional area of ​​the positioning protrusion (11) and / or the cross-sectional area of ​​the positioning groove (21) gradually decreases along the insertion direction, which is the direction in which the positioning protrusion (11) is inserted into the positioning groove (21).

9. The bracket fixing assembly according to any one of claims 1-6, wherein, The top and bottom ends of the positioning protrusion (11) are both provided with a first rounded corner (112). And / or, the opening and bottom of the positioning groove (21) are provided with a second rounded corner (212).

10. A battery module, comprising battery cells and a bracket fixing assembly as described in any one of claims 1-9, wherein a busbar assembly is provided on the side of the bracket (1) facing the module cover (2), and a plurality of battery cells are provided, and the busbar assembly is electrically connected to the plurality of battery cells.

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