Lower box body structure for large module battery

Abstract

The utility model discloses a lower box body structure for a large module battery, which relates to the technical field of battery packs, and comprises a lower box body component, and the lower box body component comprises a cover plate; the drainage head is arranged on one side of one end of the cover plate; the water inlet head is arranged on the other side of one end of the cover plate; the steel reinforcing beams are arranged in three groups, and the steel reinforcing beams are arranged at the top of the cover plate; the runner plate is arranged at the bottom of the cover plate; and the two groups of boundary beams are arranged on the two sides of the bottom of the runner plate. The components are locked through the rivet bolts and the rivet nuts, detachable maintenance is guaranteed, the thermal resistance rubber columns are embedded in the hot melting holes, fixed bonding is formed after melting, the sealing performance and the shock resistance are improved, the steel reinforcing beams and the cover plate are compounded, the lightweight and load bearing requirements are further balanced, the edge beams, the bottom reinforcing longitudinal beams and the reinforcing steel plates form a latticed framework, and the service life of the cover plate is prolonged. Load is dispersed, and box deformation is restrained.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a lower housing structure for large module batteries. Background Technology

[0002] In response to the increasingly stringent performance requirements of 1P104S battery devices, improvements have been made to the original structure. The battery casing structure is crucial in the manufacturing of new energy vehicles, as it directly relates to the structural strength, sealing performance, and lightweight design of the battery casing.

[0003] With the surge in demand for extended driving range and fast charging capabilities from new energy vehicles, the energy density and heat load of large-module batteries have increased significantly, posing a severe challenge to traditional lower-level battery structures: air-cooled or single-channel liquid-cooled designs cannot adapt to the high heat generation rate of large-module batteries, local overheating leads to accelerated battery performance degradation and poses a risk of thermal runaway. Furthermore, unreasonable coolant flow channel layout and uneven flow resistance distribution can easily create "dead zones," resulting in low heat exchange efficiency and hindering the improvement of fast charging speeds. At the same time, traditional enclosures rely on static sealant or welding connections, which are prone to micro-cracks under long-term vibration conditions, allowing moisture intrusion to cause insulation failure. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a lower housing structure for large module batteries.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A lower housing structure for large module batteries includes a lower housing assembly, the lower housing assembly including a cover plate;

[0007] A drain head is disposed on one side of one end of the cover plate;

[0008] A water inlet head is located on the other side of one end of the cover plate;

[0009] Three sets of steel reinforcing beams are provided and are located on the top of the cover plate.

[0010] A flow channel plate, wherein the flow channel plate is disposed at the bottom of the cover plate;

[0011] Two sets of side beams, both sets of side beams are set on both sides of the bottom of the flow channel plate;

[0012] The bottom reinforcing longitudinal beams are provided in multiple sets and arranged inside the two sets of side beams;

[0013] Reinforcing steel plates, wherein multiple sets of reinforcing steel plates are provided and disposed on the inner side of two sets of side beams;

[0014] A limiting plate is provided at the top of the bottom reinforcing longitudinal beam.

[0015] As a further embodiment of this utility model: the steel reinforcing beam is connected to the top of the cover plate, the bottom of the cover plate is connected to the top of the flow channel plate, and the tops of the two sets of side beams are connected to the bottom of the flow channel plate.

[0016] The lower housing assembly is entirely made of aluminum profile material;

[0017] The bottom reinforcing longitudinal beam is connected to the inner side of the two sets of side beams, and the reinforcing steel plate slides on the inner side of the two sets of side beams.

[0018] As a further embodiment of this utility model: the reinforcing steel plates are respectively disposed between the gaps of the two sets of bottom reinforcing longitudinal beams.

[0019] As a further embodiment of this utility model: the surface of the bottom reinforcing longitudinal beam is provided with protrusions, and the limiting plate is engaged with the protrusions.

[0020] As a further embodiment of this utility model: the cover plate is provided with a water inlet hole, which is connected to the drain head, and the cover plate is provided with a water outlet hole on the side away from the water inlet hole, which is connected to the water inlet head.

[0021] As a further embodiment of this utility model: a circulation groove is provided on the flow channel plate, and the circulation groove is in contact with one end of the drain head and the inlet head.

[0022] As a further embodiment of this utility model: the steel reinforcing beam, cover plate, flow channel plate, and two sets of side beams are all provided with connection holes so that the rivet bolts can pass through and connect with the rivet nuts for assembly.

[0023] As a further embodiment of this utility model: the steel reinforcing beam, cover plate, flow channel plate, and two sets of side beams are all provided with hot melt holes to facilitate the embedding and melting of the heat-resistant adhesive columns for fixation.

[0024] The beneficial effects of this utility model are:

[0025] (1) In this utility model, each component is locked by rivet bolts and rivet nuts to ensure disassembly and maintenance. Heat-resistant adhesive columns are embedded in the hot melt holes. After melting, they form a fixed bond, improving sealing and shock resistance. The steel reinforcing beams are combined with the cover plate to balance the requirements of lightweight and load-bearing. The side beams, bottom reinforcing longitudinal beams and reinforcing steel plates form a grid-like skeleton to distribute the load and suppress the deformation of the box.

[0026] (2) In this utility model, the coolant enters from the inlet head, flows into the circulation groove of the flow channel plate through the outlet hole of the cover plate, absorbs the heat of the battery, and is discharged through the inlet hole of the drain head, forming a closed-loop thermal management, which can effectively dissipate the heat generated by the battery module. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ;

[0030] Figure 3 This is an exploded view of this utility model;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 This is a three-dimensional structural diagram of the flow channel plate in this utility model;

[0033] Figure 6 This is a schematic diagram of a partial component of this utility model.

[0034] In the diagram: 1. Lower housing assembly; 2. Rivet bolt; 3. Rivet nut; 4. Heat-resistant adhesive column; 5. Circulation trough; 10. Drain head; 11. Inlet head; 12. Steel reinforcing beam; 13. Cover plate; 14. Flow channel plate; 15. Limiting plate; 151. Water outlet; 152. Inlet; 16. Reinforcing steel plate; 17. Side beam; 18. Bottom reinforcing longitudinal beam; 19. Protrusion. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] Example 1

[0037] Please see Figures 1-6 As shown, this utility model is a lower housing structure for large module batteries, characterized in that it includes a lower housing assembly 1, and the lower housing assembly 1 includes a cover plate 13.

[0038] Drainage head 10, the drainage head 10 is provided on one side of one end of the cover plate 13;

[0039] Water inlet head 11 is located on the other side of one end of cover plate 13;

[0040] Steel reinforcing beam 12, three sets of steel reinforcing beam 12 are provided, and the steel reinforcing beam 12 is provided on the top of the cover plate 13;

[0041] Flow channel plate 14 is disposed at the bottom of cover plate 13;

[0042] Two sets of side beams 17 are provided on both sides of the bottom of the flow channel plate 14;

[0043] The bottom reinforcing longitudinal beam 18 is provided in multiple sets and arranged inside the two sets of side beams 17;

[0044] Reinforcing steel plate 16, multiple sets of reinforcing steel plate 16 are provided and are located on the inner side of two sets of side beams 17;

[0045] Limiting plate 15 is located at the top of bottom reinforcing longitudinal beam 18.

[0046] In a preferred embodiment, the steel reinforcing beam 12 is connected to the top of the cover plate 13, the bottom of the cover plate 13 is connected to the top of the flow channel plate 14, and the tops of the two sets of side beams 17 are connected to the bottom of the flow channel plate 14.

[0047] The lower housing assembly 1 is entirely made of aluminum profile material;

[0048] The bottom reinforcing longitudinal beam 18 is connected to the inner side of the two sets of side beams 17, and the reinforcing steel plate 16 slides on the inner side of the two sets of side beams 17.

[0049] It should be noted that the steel reinforcing beam 12 is combined with the cover plate 13 to balance the requirements of lightweighting and load-bearing capacity.

[0050] The side beam 17, the bottom reinforcing longitudinal beam 18, and the reinforcing steel plate 16 form a grid-like skeleton to distribute the load and suppress the deformation of the box.

[0051] The sliding reinforced steel plate 16 allows for localized stress release and reduces vibration and impact.

[0052] As a preferred embodiment, the reinforcing steel plates 16 are respectively disposed between the gaps of the two sets of bottom reinforcing longitudinal beams 18.

[0053] In a preferred embodiment, the surface of the bottom reinforcing longitudinal beam 18 is provided with protrusions 19, and the limiting plate 15 is engaged with the protrusions 19.

[0054] As a preferred embodiment, the steel reinforcing beam 12, cover plate 13, flow channel plate 14, and two sets of side beams 17 are all provided with connection holes so that the rivet bolts 2 can pass through and connect with the rivet nuts 3 for assembly.

[0055] As a preferred embodiment, the steel reinforcing beam 12, cover plate 13, flow channel plate 14, and two sets of side beams 17 are all provided with hot melt holes to facilitate the insertion and melting of the heat-resistant adhesive column 4 for fixation.

[0056] During implementation, the steel reinforcing beam 12 is fixed to the aluminum cover plate 13 by rivet bolts 2 to enhance the rigidity of the top;

[0057] The bottom of the cover plate 13 is fused to the flow channel plate 14 through the thermal resistance adhesive column 4 to form a sealed cooling flow channel;

[0058] The flow channel plate 14 is connected to the bottom reinforcing longitudinal beam 18 via the side beam 17 below, and the reinforcing steel plate 16 is slidably inserted into the gap of the longitudinal beam to form a mesh support;

[0059] The limiting plate 15 engages with the protrusion 19 of the bottom longitudinal beam 18 to constrain the displacement of the reinforcing steel plate 16;

[0060] Each component is locked in place by rivet bolts 2 and rivet nuts 3 to ensure disassembly and maintenance. Heat-resistant adhesive pillars 4 are embedded in the hot melt holes, which form a fixed bond after melting, improving sealing and shock resistance.

[0061] Example 2

[0062] In a preferred embodiment, the cover plate 13 is provided with a water inlet hole 152, which communicates with the drain head 10. A water outlet hole 151 is provided on the side of the cover plate 13 away from the water inlet hole 152, which communicates with the water inlet head 11.

[0063] In a preferred embodiment, a circulation groove 5 is provided on the flow channel plate 14, and the circulation groove 5 is in contact with one end of the drain head 10 and the inlet head 11.

[0064] During implementation, the coolant enters from the inlet head 11, flows into the circulation tank 5 of the flow channel plate 14 through the outlet hole 151 of the cover plate 13, absorbs the heat of the battery, and is discharged through the inlet hole 152 of the drain head 10, forming a closed-loop thermal management.

[0065] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A lower housing structure for large-module batteries, characterized in that, It includes a lower housing assembly (1), the lower housing assembly (1) including a cover plate (13); Drain head (10), the drain head (10) is disposed on one side of one end of the cover plate (13); Water inlet head (11), the water inlet head (11) is located on the other side of one end of the cover plate (13); Steel reinforcing beams (12), three sets of which are provided, are located on the top of the cover plate (13); A flow channel plate (14) is disposed at the bottom of the cover plate (13); Two sets of side beams (17) are provided on both sides of the bottom of the flow channel plate (14); Bottom reinforcing longitudinal beam (18), wherein multiple sets of bottom reinforcing longitudinal beam (18) are provided and arranged inside the two sets of side beams (17); Reinforcing steel plate (16), wherein multiple sets of reinforcing steel plate (16) are provided and are located on the inner side of two sets of side beams (17); A limiting plate (15) is provided on the top of the bottom reinforcing longitudinal beam (18).

2. The lower casing structure for a large module battery according to claim 1, characterized in that, The steel reinforcing beam (12) is connected to the top of the cover plate (13), the bottom of the cover plate (13) is connected to the top of the flow channel plate (14), and the top of the two sets of side beams (17) is connected to the bottom of the flow channel plate (14). The lower housing assembly (1) is made entirely of aluminum profile material; The bottom reinforcing longitudinal beam (18) is connected to the inner side of the two sets of side beams (17), and the reinforcing steel plate (16) slides on the inner side of the two sets of side beams (17).

3. The lower casing structure for a large module battery according to claim 1, characterized in that, The reinforcing steel plates (16) are respectively placed between the gaps of the two sets of bottom reinforcing longitudinal beams (18).

4. The lower casing structure for a large module battery according to claim 1, characterized in that, The bottom reinforcing longitudinal beam (18) has a protrusion (19) on its surface, and the limiting plate (15) is engaged with the protrusion (19).

5. The lower casing structure for a large module battery according to claim 1, characterized in that, The cover plate (13) is provided with a water inlet hole (152), which is connected to the drain head (10). The cover plate (13) is provided with a water outlet hole (151) on the side away from the water inlet hole (152), which is connected to the water inlet head (11).

6. The lower casing structure for a large module battery according to claim 1, characterized in that, The flow channel plate (14) is provided with a circulation groove (5), which is in contact with one end of the drain head (10) and the inlet head (11).

7. The lower casing structure for a large module battery according to claim 1, characterized in that, The steel reinforcing beam (12), cover plate (13), flow channel plate (14), and two sets of side beams (17) are all provided with connection holes so that the rivet bolts (2) can pass through and connect with the rivet nuts (3) for assembly.

8. The lower casing structure for a large module battery according to claim 1, characterized in that, The steel reinforcing beam (12), cover plate (13), flow channel plate (14), and two sets of side beams (17) are all provided with hot melt holes so that the heat-resistant adhesive column (4) can be embedded and melted for fixation.

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