Aluminum-plastic composite battery module end plate assembly capable of being freely combined and manufacturing method

Abstract

The invention discloses an aluminum-plastic composite battery module end plate assembly capable of being freely combined and a manufacturing method. The composite battery module end plate assembly comprises two aluminum alloy profile buckling edges, two aluminum alloy profile plates and a plastic profile middle buckling strip, the inner side edges of the aluminum alloy profile plates are clamped in the grooves in the two sides of the buckling strip in the middle of the plastic profile respectively, and the outer side edges of the two aluminum alloy profile plates are clamped with the aluminum alloy profile buckling edges respectively. The cross section of the aluminum alloy profile buckling edge is U-shaped, the cross section of the plastic profile middle buckling strip is I-shaped, and the two sides of the aluminum alloy profile plate are step-shaped. According to the aluminum-plastic composite battery module end plate assembly capable of being freely combined and the manufacturing method, on the premise that the structural strength of the end plate is not reduced, the use amount of an aluminum alloy material is greatly reduced, the product cost is greatly reduced, battery swelling stress in the using process of a battery module can be effectively absorbed through the energy absorption characteristic of a plastic material, and the service life of the battery module is prolonged. Therefore, the reliability of the battery module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy battery system integration and grouping, and in particular to a freely combinable aluminum-plastic composite battery module end plate assembly and a manufacturing method thereof. Background Art

[0002] Battery modules usually include end plates, steel strapping, insulation materials, busbars, battery cells and other components. The end plates are mainly aluminum profile end plates, aluminum die-cast end plates, injection molded end plates and other types. Aluminum die-cast end plates and injection molded end plates are finished products, while aluminum profile end plates are extruded and then subjected to necessary cutting processing by CNC milling machines. Patent CN220106740U discloses a battery module and a battery pack, the battery pack includes a battery module, the battery module includes a module frame, a plurality of battery cell groups, a battery connection assembly and an upper cover, the battery cell group includes a plurality of battery cells spaced apart along a second direction; the module frame includes two first end plates that are opposite and spaced apart along the second direction, two side plates that are opposite and spaced apart along a third direction and at least one second end plate, the two first end plates and the two second end plates enclose a accommodating cavity, the plurality of battery cell groups are arranged in the accommodating cavity, the second end plate is arranged between the two first end plates and spaced apart from the first end plates, the two ends of the second end plate along the third direction are respectively connected to the two side plates, and a plurality of spaced apart fixing portions are provided on the outward side of the side plate; the above-mentioned first end plate, the second end plate and the side plate are all formed by extrusion molding of aluminum profiles, the aluminum material is relatively light, and the first end plate and the second end plate are both provided with a plurality of reinforcing ribs, which can improve the structural strength of the entire module frame. The above structure can improve the structural strength of the battery module, improve the impact and vibration resistance of the battery module, and thus improve the safety of the battery module.

[0003] At present, most new energy battery modules use aluminum alloy profile aluminum end plates, which are mostly honeycomb structures. The profiles are all flat, and shallow grooves are processed on the sides away from the battery. The expansion force during the use of the battery acts entirely on the plane close to the battery cell. Patent CN221009093U discloses an end plate, a box, a battery and an electrical device. Among them, the end plate includes: a first plate, including a first connecting portion, the first connecting portion is closed-loop arranged along the circumferential edge of the first plate, and is configured to form a continuous sealed connection with the environmental component; and a second plate, which is stacked with the first plate along a first direction; the second plate includes an interval arrangement along the circumferential edge of the second plate. Among them, the first connecting portion of the first plate forms a continuous sealed connection with the environmental component, which is used to achieve the sealing of the connection between the end plate and the environmental component, and the second connecting portion of the second plate is connected to the environmental component through a connecting piece, which is used to improve the connection strength between the end plate and the environmental component. The first plate includes an aluminum plate, and the second plate includes a steel plate or an aluminum plate. An intermediate member with a honeycomb structure is arranged between the first plate and the second plate, which can provide a buffering effect for the end plate. The end plate has fewer parts, a simple structure, is easy to connect with environmental components, has low cost and high reliability.

[0004] The processing cost of new energy battery PACK is high, and the proportion of aluminum end plates in the PACK processing cost is relatively large. Therefore, it is necessary to consider significantly reducing the structural design cost of the end plate without reducing the structural strength of the end plate. Summary of the invention

[0005] In view of this, the purpose of the present invention is to address the deficiencies in the prior art and provide a freely combinable aluminum-plastic composite battery module end plate assembly and a manufacturing method, which greatly reduces the design and processing costs of the end plates without reducing the structural strength of the end plates, thereby optimizing the cost proportion of aluminum end plates in battery PACK auxiliary components and offsetting part of the battery expansion stress.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a freely combinable aluminum-plastic composite battery module end plate assembly, comprising two aluminum alloy profile buckle edges, two aluminum alloy profile plates and a plastic profile middle buckle strip; the grooves on both sides of the plastic profile middle buckle strip each clamp an inner side edge of an aluminum alloy profile plate, and the outer sides of the two aluminum alloy profile plates each clamp an aluminum alloy profile buckle edge; the cross-section of the aluminum alloy profile buckle edge is U-shaped, the cross-section of the plastic profile middle buckle strip is I-shaped, and the two sides of the aluminum alloy profile plate are stepped.

[0007] Furthermore, the inner side step surface of the aluminum alloy profile plate is interference fit with the grooves on both sides of the middle buckle strip of the plastic profile, and the inner side step surface of the aluminum alloy profile plate and the inner walls of the grooves on both sides of the middle buckle strip of the plastic profile are coated with structural adhesive.

[0008] Furthermore, rivet holes penetrating the plastic profile middle buckle strip are provided on both side surfaces, and rivet holes penetrating the aluminum alloy profile plate are correspondingly provided on the inner side step surface.

[0009] Furthermore, a long screw fixing hole is provided on the non-battery contacting side of the aluminum alloy profile buckle, and a long screw fixing hole is provided correspondingly on the outer side step surface of the aluminum alloy profile plate, and the side of the aluminum alloy profile buckle and the outer side of the aluminum alloy profile plate are fixed by long screws.

[0010] Furthermore, bosses are provided at the bottom of the grooves on both sides of the middle buckle strip of the plastic profile and at the bottom of the buckle edge groove of the aluminum alloy profile, and narrow grooves are correspondingly provided on both side edges of the aluminum alloy profile plate. The bosses of the middle buckle strip of the plastic profile and the bosses of the buckle edge of the aluminum alloy profile are both clamped in the narrow grooves of the aluminum alloy profile plate.

[0011] Furthermore, the middle buckle strip of the plastic profile is a PVC extruded profile.

[0012] A method for manufacturing a freely combinable aluminum-plastic composite battery module end plate assembly comprises the following steps:

[0013] S1. Aluminum alloy profile buckles and aluminum alloy profile plates are first manufactured using aluminum profile extrusion technology, and then cut into required lengths using a CNC sawing machine;

[0014] S2, using a CNC milling machine to process two shallow grooves on the side of the aluminum alloy profile plate that is not in contact with the battery, and to process rivet holes that penetrate the aluminum alloy profile plate;

[0015] S3. The middle buckle strip of the plastic profile is extruded into a profile by an extruder, cut into suitable sizes, and processed into rivet holes that penetrate the middle buckle strip of the plastic profile;

[0016] S4. Apply structural adhesive to the joints of the aluminum alloy profile buckle edge, aluminum alloy profile plate and plastic profile middle buckle strip, and assemble the aluminum alloy profile buckle edge, aluminum alloy profile plate and plastic profile middle buckle strip into a complete aluminum-plastic composite end plate.

[0017] A method for using a freely combinable aluminum-plastic composite battery module end plate assembly, using the aluminum-plastic composite end plate manufactured as described above, the method for using comprises the following steps:

[0018] S1. Open rivet holes corresponding to the battery module steel strip;

[0019] S2. Use stainless steel rivets to penetrate the middle buckle strip of the plastic profile, the aluminum alloy profile plate, and the steel strip, and rivet the steel strip, the aluminum alloy profile plate, and the middle buckle strip of the plastic profile into one.

[0020] A freely combinable composite battery module end plate assembly comprises two aluminum alloy profile buckles and an aluminum alloy profile plate; the two side edges of the aluminum alloy profile plate are each clamped with an aluminum alloy profile buckle edge, the cross-section of the aluminum alloy profile buckle edge is U-shaped, and the two sides of the aluminum alloy profile plate are stepped.

[0021] Furthermore, a long screw fixing hole is provided on the non-battery contacting side of the aluminum alloy profile buckle, and a long screw fixing hole is provided correspondingly on the outer side step surface of the aluminum alloy profile plate, and the side of the aluminum alloy profile buckle and the outer side of the aluminum alloy profile plate are fixed by long screws.

[0022] The beneficial effects of the present invention are:

[0023] The freely combinable aluminum-plastic composite battery module end plate assembly of the present invention is formed by freely splicing aluminum alloy profile buckle edges, aluminum alloy profile plates and plastic profile middle buckle strips. Without reducing the structural strength of the end plate, the design and processing costs of the end plate are greatly reduced, thereby optimizing the cost proportion of the aluminum end plate in the battery PACK auxiliary components, and can also offset part of the battery swelling stress.

[0024] The present invention integrates the aluminum alloy profile and the plastic profile into one by freely combining the aluminum alloy profile buckle edge, the aluminum alloy profile plate and the plastic profile middle buckle strip. The aluminum alloy profile only exists as a frame, which reduces the proportion of the aluminum profile material in the composite end plate and greatly reduces the design and processing costs of the end plate.

[0025] The present invention designs the aluminum alloy profile and the plastic profile into interface shapes that cooperate with each other. After the profile is cut and polished, the end plate components of two different materials are processed together through interference fit + bonding between the mortise and tenon connection surfaces. Since the plastic profile has high structural strength and load-bearing capacity, the plastic profile can be used to ensure the structural strength of the frame while offsetting part of the battery expansion stress.

[0026] The middle buckle strip of the plastic profile of the present invention adopts PVC extruded profile, the price of PVC material is about 40% of the price of aluminum alloy material, and the density of PVC material is about 60% of aluminum alloy material. Taking all factors into consideration, the material processing cost can be reduced by at least 50%. At the same time, compared with the existing aluminum alloy profile end plate, the machining amount is greatly reduced, thereby reducing the material processing cost.

[0027] The freely combinable aluminum-plastic composite battery module end plate assembly of the present invention rivets a steel belt, an aluminum alloy profile plate, and a plastic profile middle buckle strip into one body, limits the position of the steel belt, and performs Z-direction reinforcement by riveting with steel rivets, so as to avoid mutual misalignment between the steel belt and the aluminum alloy profile plate and the plastic profile middle buckle strip due to strong Z-direction vibration damage during the use of the battery module, thereby preventing damage to the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 This is a cross-sectional view of the structure of the end plate assembly of the aluminum-plastic composite battery module that can be freely combined according to the present invention;

[0029] Attached Figure 2 This is a cross-sectional view of the buckle edge structure of the aluminum alloy profile component of the present invention;

[0030] Attached Figure 3 This is a cross-sectional view of the aluminum alloy profile plate structure of the components of the present invention;

[0031] Attached Figure 4 This is a cross-sectional view of the structure of the middle buckle strip of the plastic profile component of the present invention;

[0032] Attached Figure 5 A three-dimensional diagram of the end plate assembly of the aluminum-plastic composite battery module that can be freely combined according to the present invention;

[0033] Attached Figure 6 This is a cross-sectional view of the structure of the end plate assembly of the composite battery module that can be freely combined according to the present invention;

[0034] Attached Figure 7 It is a stereoscopic diagram of the end plate assembly of the freely combinable composite battery module of the present invention.

[0035] Explanation of the reference numerals: 1-aluminum alloy profile buckle edge, 2-aluminum alloy profile plate, 3-plastic profile middle buckle strip. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0037] Example 1

[0038] A freely combinable aluminum-plastic composite battery module end plate assembly, such as Figure 1 As shown, it includes two aluminum alloy profile buckle edges 1, two aluminum alloy profile plates 2 and a plastic profile middle buckle strip 3. The grooves on both sides of the plastic profile middle buckle strip 3 are each clamped with an inner side edge of an aluminum alloy profile plate 2, and the outer sides of the two aluminum alloy profile plates 2 are each clamped with an aluminum alloy profile buckle edge 1. The cross section of the aluminum alloy profile buckle edge 1 is U-shaped, as shown in FIG. Figure 2 As shown, the two sides of the aluminum alloy profile plate 2 are stepped. Figure 3 As shown, the cross section of the middle buckle strip 3 of the plastic profile is an I-shaped, such as Figure 4 As shown, it is suitable for integrating double-row battery modules into groups, such as Figure 5 shown.

[0039] The plastic profile middle buckle strip 3 has high structural strength and load-bearing capacity. It can not only ensure the structural strength of the frame, but also offset part of the battery expansion stress due to the plastic material's plastic deformation function. The price of plastic profiles is generally lower than that of aluminum alloy profiles, which can greatly reduce the cost of end plate materials.

[0040] Example 2

[0041] The difference between this embodiment and embodiment 1 is that the inner side step surface of the aluminum alloy profile plate 2 is interference fit with the grooves on both sides of the plastic profile middle buckle strip 3, and structural adhesive is applied to the inner side step surface of the aluminum alloy profile plate 2 and the inner wall of the grooves on both sides of the plastic profile middle buckle strip 3. The plastic profile middle buckle strip 3 and the aluminum alloy profile plate 2 are double fixed by interference fit + adhesive fixation, which improves the assembly stability of the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3.

[0042] Example 3

[0043] The difference between this embodiment and embodiment 1 is that: Figure 5 As shown, rivet holes penetrating the plastic profile middle buckle strip 3 are provided on both sides, and rivet holes penetrating the aluminum alloy profile plate 2 are provided on the inner side step surface. Rivet holes are provided on the battery module steel belt accordingly. After the battery module steel belt is installed, stainless steel rivets are used to penetrate the plastic profile middle buckle strip 3, the aluminum alloy profile plate 2, and the steel belt, and the steel belt, the aluminum alloy profile plate 2, and the plastic profile middle buckle strip 3 are riveted together. The steel belt is limited to avoid mutual misalignment between the steel belt and the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3 due to strong Z-axis vibration damage during the use of the battery module, thereby causing damage to the battery module. At the same time, the stainless steel rivets can improve the assembly stability of the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3.

[0044] Example 4

[0045] The difference between this embodiment and embodiment 1 is that: Figure 5 As shown, a long screw fixing hole is provided on the side of the aluminum alloy profile buckle 1 that is not in contact with the battery, and a long screw fixing hole is provided on the step surface of the outer side of the aluminum alloy profile plate 2 accordingly. The side of the aluminum alloy profile buckle 1 and the outer side of the aluminum alloy profile plate 2 are fixed by long screws, thereby improving the assembly stability of the aluminum alloy profile plate 2 and the aluminum alloy profile buckle 1.

[0046] Example 5

[0047] The difference between this embodiment and embodiment 1 is that: Figure 2-4As shown, bosses are provided at the bottom of the grooves on both sides of the middle buckle strip 3 of the plastic profile and at the bottom of the grooves on the buckle edge 1 of the aluminum alloy profile, and narrow grooves are correspondingly provided on both side edges of the aluminum alloy profile plate 2. The bosses of the middle buckle strip 3 of the plastic profile and the bosses of the buckle edge 1 of the aluminum alloy profile are both clamped into the narrow grooves of the aluminum alloy profile plate 2, thereby improving the clamping position accuracy of the middle buckle strip 3 of the plastic profile, the buckle edge 1 of the aluminum alloy profile plate 2, so that a flat surface is formed after the middle buckle strip 3 of the plastic profile, the buckle edge 1 of the aluminum alloy profile and the two aluminum alloy profile plates 2 are clamped.

[0048] Example 6

[0049] The difference between this embodiment and embodiment 1 is that the middle buckle strip 3 of the plastic profile is a PVC extruded profile, which has both good structural performance and plastic deformation function, and the material price cost is low. The aluminum alloy profile plate 2 is used as the left and right skeletons, and the PVC extruded profile is used as the inner core. The good plastic deformation function of the PVC plastic material can be used to effectively absorb the stress generated during the battery swelling process, and a certain deformation space is given to the swelling deformation generated during the later use of the battery, which can effectively improve the safety of the battery during use, thereby improving the reliability of the battery module.

[0050] The price of PVC material is about 40% of the price of aluminum alloy material, and the density of PVC material is about 60% of aluminum alloy material. Taking all factors into consideration, the material processing cost can be reduced by at least 50%. The low cost, high flame retardancy, good elasticity of PVC extruded material greatly reduce the amount of machining compared to the existing aluminum alloy profile end plate, thereby reducing the material processing cost.

[0051] Example 7

[0052] A method for manufacturing a freely combinable aluminum-plastic composite battery module end plate assembly comprises the following steps:

[0053] S1, aluminum alloy profile buckle 1, and aluminum alloy profile plate 2 are first manufactured using an aluminum profile extrusion process, and then cut into required lengths using a CNC sawing machine;

[0054] S2, using a CNC milling machine to process two shallow grooves on the side of the aluminum alloy profile plate 2 that is not in contact with the battery, and to process rivet holes that penetrate the aluminum alloy profile plate 2;

[0055] S3, the middle buckle strip 3 of the plastic profile is extruded into a profile by an extruder, cut into suitable sizes, and a rivet hole is processed to penetrate the middle buckle strip 3 of the plastic profile;

[0056] S4. Apply structural adhesive to the joints of the aluminum alloy profile buckle edge 1, the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3, and assemble the aluminum alloy profile buckle edge 1, the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3 into a complete aluminum-plastic composite end plate.

[0057] Example 8

[0058] A method for using a freely combinable aluminum-plastic composite battery module end plate assembly comprises the following steps:

[0059] S1. Open rivet holes corresponding to the battery module steel strip;

[0060] S2. Use stainless steel rivets to penetrate the plastic profile middle buckle strip 3, the aluminum alloy profile plate 2, and the steel strip, and rivet the steel strip, the aluminum alloy profile plate 2, and the plastic profile middle buckle strip 3 into one.

[0061] By riveting the steel belt, aluminum alloy profile plate 2, and plastic profile middle buckle strip 3 together, the steel belt is limited in position to avoid mutual misalignment between the steel belt and the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3 due to strong Z-axis vibration damage during the use of the battery module, thereby preventing damage to the battery module; at the same time, the stainless steel rivets can improve the assembly stability of the aluminum alloy profile plate 2 and the plastic profile middle buckle strip 3.

[0062] Example 9

[0063] A freely combinable composite battery module end plate assembly, such as Figure 6 As shown, it includes two aluminum alloy profile buckles 1 and an aluminum alloy profile plate 2. The two sides of the aluminum alloy profile plate 2 are each clamped with an aluminum alloy profile buckle 1, the cross section of the aluminum alloy profile buckle 1 is U-shaped, and the two sides of the aluminum alloy profile plate 2 are stepped, which is suitable for integrating single-row battery modules into groups, such as Figure 7 shown.

[0064] Example 10

[0065] The difference between this embodiment and embodiment 9 is that: Figure 7 As shown, a long screw fixing hole is provided on the side of the aluminum alloy profile buckle 1 that is not in contact with the battery, and a long screw fixing hole is provided correspondingly on the step surface of the outer side edge of the aluminum alloy profile plate 2. The side of the aluminum alloy profile buckle 1 and the outer side edge of the aluminum alloy profile plate 2 are fixed by long screws to ensure the assembly stability of the aluminum alloy profile plate 2 and the aluminum alloy profile buckle 1.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A freely combinable aluminum-plastic composite battery module end plate assembly, characterized in that: The invention comprises two aluminum alloy profile buckle edges (1), two aluminum alloy profile plates (2) and a plastic profile middle buckle strip (3); the inner side edges of an aluminum alloy profile plate (2) are respectively clamped in the grooves on both sides of the plastic profile middle buckle strip (3), and the outer sides of the two aluminum alloy profile plates (2) are respectively clamped in an aluminum alloy profile buckle edge (1); the cross section of the aluminum alloy profile buckle edge (1) is U-shaped, the cross section of the plastic profile middle buckle strip (3) is I-shaped, and the two sides of the aluminum alloy profile plate (2) are stepped.

2. The freely combinable aluminum-plastic composite battery module end plate assembly according to claim 1, characterized in that: The inner side step surface of the aluminum alloy profile plate (2) is interference fit with the grooves on both sides of the middle buckle strip (3) of the plastic profile, and the inner side step surface of the aluminum alloy profile plate (2) and the inner walls of the grooves on both sides of the middle buckle strip (3) of the plastic profile are both coated with structural adhesive.

3. The freely combinable aluminum-plastic composite battery module end plate assembly according to claim 1 or 2, characterized in that: Rivet holes penetrating the plastic profile middle buckle strip (3) are provided on both sides of the plastic profile middle buckle strip (3), and rivet holes penetrating the aluminum alloy profile plate (2) are correspondingly provided on the inner side step surface of the aluminum alloy profile plate (2).

4. The freely combinable aluminum-plastic composite battery module end plate assembly according to claim 1 or 2, characterized in that: A long screw fixing hole is provided on the side of the aluminum alloy profile buckle edge (1) that is not in contact with the battery, and a long screw fixing hole is provided on the step surface of the outer side edge of the aluminum alloy profile plate (2) correspondingly, and the side of the aluminum alloy profile buckle edge (1) and the outer side edge of the aluminum alloy profile plate (2) are fixed by long screws.

5. The freely combinable aluminum-plastic composite battery module end plate assembly according to claim 1 or 2, characterized in that: The bottoms of the grooves on both sides of the middle buckle strip (3) of the plastic profile and the bottoms of the grooves on the buckle edge (1) of the aluminum alloy profile are both provided with bosses, and narrow grooves are correspondingly provided on both side edges of the aluminum alloy profile plate (2), and the bosses of the middle buckle strip (3) of the plastic profile and the bosses of the buckle edge (1) of the aluminum alloy profile are both clamped in the narrow grooves of the aluminum alloy profile plate (2).

6. The freely combinable aluminum-plastic composite battery module end plate assembly according to claim 1 or 2, characterized in that: The plastic profile middle buckle strip (3) is a PVC extruded profile.

7. A method for manufacturing a freely combinable aluminum-plastic composite battery module end plate assembly, characterized in that: The steps include: S1, the aluminum alloy profile buckle (1), and the aluminum alloy profile plate (2) are first manufactured by using an aluminum profile extrusion process, and then cut into required lengths by a CNC sawing machine; S2, using a CNC milling machine to machine two shallow grooves on the side of the aluminum alloy profile plate (2) that is not in contact with the battery, and to machine rivet holes that penetrate the aluminum alloy profile plate (2); S3, the middle buckle strip (3) of the plastic profile is extruded into a profile by an extruder, cut into suitable sizes, and a rivet hole is processed to penetrate the middle buckle strip (3) of the plastic profile; S4. Apply structural adhesive to the joints of the aluminum alloy profile buckle edge (1), the aluminum alloy profile plate (2) and the plastic profile middle buckle strip (3), and assemble the aluminum alloy profile buckle edge (1), the aluminum alloy profile plate (2) and the plastic profile middle buckle strip (3) into a complete aluminum-plastic composite end plate.

8. A method for using a freely combinable aluminum-plastic composite battery module end plate assembly, using the aluminum-plastic composite end plate manufactured in claim 7, characterized in that: The method of use includes the following steps: S1. Open rivet holes corresponding to the battery module steel strip; S2. Use stainless steel rivets to penetrate the plastic profile middle buckle strip (3), the aluminum alloy profile plate (2), and the steel strip, and rivet the steel strip, the aluminum alloy profile plate (2), and the plastic profile middle buckle strip (3) into one piece.

9. A freely combinable composite battery module end plate assembly, characterized in that: It comprises two aluminum alloy profile buckles (1) and an aluminum alloy profile plate (2); the two side edges of the aluminum alloy profile plate (2) are each clamped with an aluminum alloy profile buckle (1), the cross section of the aluminum alloy profile buckle (1) is U-shaped, and the two sides of the aluminum alloy profile plate (2) are stepped.

10. The freely combinable composite battery module end plate assembly according to claim 9, characterized in that: A long screw fixing hole is provided on the side of the aluminum alloy profile buckle edge (1) that is not in contact with the battery, and a long screw fixing hole is provided on the step surface of the outer side edge of the aluminum alloy profile plate (2) correspondingly, and the side of the aluminum alloy profile buckle edge (1) and the outer side edge of the aluminum alloy profile plate (2) are fixed by long screws.

Images