Lower box body of liquid-cooled battery pack

Abstract

The utility model provides a lower box body of a liquid-cooled battery pack, which comprises a liquid-cooled plate and a bracket, the liquid-cooled plate is arranged at the top of the bracket, and the upper end surface of the liquid-cooled plate is used for placing a battery module; a plurality of reinforcing cross beams are longitudinally arranged in the bracket cavity, the reinforcing cross beams comprise cross beams, the cross beams are folded in multiple layers in the horizontal direction, the lower end faces of the cross beams are in surface connection with the bracket, a plurality of protruding parts are arranged on the upper end faces of the cross beams, and the protruding parts and a non-cooling flow channel area of the liquid cooling plate are attached and supported. According to the utility model, the bearing capacity and shock resistance of the battery lower box body can be improved, and the cooling flow channel area is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave antennas, in particular to a lower box body of a liquid-cooled battery pack. Background Art

[0002] With the vigorous development of clean energy, new energy storage is increasingly becoming a key technology for my country to build a new energy system. Among them, lithium-ion battery energy storage occupies an absolute dominant position, and the reliability and safety of core components such as batteries are closely related to the temperature of the battery cell. As the energy density of batteries increases, liquid cooling has become an important way to dissipate heat for batteries. The lower box of the battery pack must meet both the heat dissipation requirements of the battery and the load-bearing requirements.

[0003] At present, most of the lower boxes of battery packs on the market are stamped and brazed cold plates, which increase the load-bearing capacity of the product by increasing the plate thickness or adopting a frame structure. Increasing the plate thickness will only increase the load-bearing capacity to a limited extent, and it is prone to failure during vibration. The frame structure is generally only fixed at the frame connection points, and the connection points are prone to cracking, increasing the risk of battery pack failure; at the same time, in order to meet the load-bearing requirements of the lower box of the battery pack, the battery module area of ​​the bracket is equipped with multiple longitudinal and transverse beams and staggered reinforcement beams to support the cold plate. The reinforcement beams are in direct contact with the flow channel surface, resulting in a bulky battery pack and a complex structure, which increases the risk of flow channel damage, and multiple connection points are prone to deformation during production. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid-cooled battery pack lower box, which can improve the load-bearing capacity and earthquake resistance of the battery lower box and avoid damaging the cooling flow channel area.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a liquid-cooled battery lower box, including a liquid cooling plate and a bracket, the liquid cooling plate is arranged on the top of the bracket, and the upper end surface of the liquid cooling plate is used to place the battery module; a plurality of reinforcing beams are longitudinally arranged in the bracket cavity, the reinforcing beams include a beam, the beam structure is multi-layer folded in the horizontal direction, the lower end surface of the beam is surface-connected with the bracket, and a plurality of protruding parts are arranged on the upper end surface of the beam, and the protruding parts are fitted and supported with the non-cooling channel area of ​​the liquid cooling plate.

[0006] Preferably, the liquid cooling plate includes a flow channel plate and a cover plate, wherein the cover plate is arranged directly above the flow channel plate, and the flow channel plate is provided with downward protrusions arranged in a serpentine manner except for the edge area where the battery module is projected downward, and a continuous cooling flow channel area is formed between the downward protrusions and the cover plate.

[0007] Preferably, the downwardly protruding liquid inlet joint and liquid outlet joint are both arranged at the edge of the flow channel plate.

[0008] Preferably, the upper end surface of the protruding component is flush with the upper end surface of the bracket, and the upper end surface of the protruding component is in contact with the non-cooling channel area of ​​the liquid cooling plate.

[0009] Preferably, the cover plate and the flow channel plate are fixedly connected by two longitudinally arranged module mounting beams, and the module mounting beams are arranged at the outer peripheries of the downward protrusions of the cover plate and the flow channel plate.

[0010] Preferably, the bracket includes a bottom guard plate, a front cross beam and a rear cross beam, the two ends of the front cross beam and the rear cross beam are fixedly connected by side longitudinal beams, and the bottom guard plate is arranged at the bottom of the front cross beam and the rear cross beam.

[0011] Preferably, the middle parts of the front cross beam and the rear cross beam are fixedly connected by an intermediate beam, and the reinforcing cross beam is arranged on the intermediate beam.

[0012] Preferably, the liquid cooling plate and the bracket are connected and fixed by rivet nuts on all sides, and the upper end surface of the middle beam and the liquid cooling plate are fixedly connected by a buffer medium.

[0013] Preferably, the upper end surfaces of the side longitudinal beams, the middle beam, the front cross beam and the rear cross beam are flush, and hoisting installation holes are arranged on the side longitudinal beams.

[0014] Preferably, a welding nut is provided on the inner side of the side longitudinal beam.

[0015] The beneficial effects of the utility model are:

[0016] The lower box of the liquid-cooled battery is provided with a bracket and a reinforced crossbeam, which improves the load-bearing capacity compared to the form of increasing the plate thickness. The crossbeam structure is a multi-layer folded structure in the horizontal direction, which further improves the load-bearing capacity and seismic resistance of the lower box of the battery. By providing a raised component on the upper end surface of the crossbeam that fits and supports the non-cooling channel area of ​​the liquid cooling plate, it not only plays a stable support function, but also avoids the occurrence of damage to the cooling channel area. The longitudinal and transverse beams around the bracket are connected by the ends and fixed to the liquid cooling plate by rivet screws. The middle beam is directly connected to the front and rear crossbeams to ensure the strength of the entire bracket. The surrounding longitudinal and transverse beams and the middle beam are connected to the bottom guard plate through the surface, which further improves the stability and reliability of the bracket. The upper end surface of the middle beam is fixedly connected to the liquid cooling plate by a buffer medium, which not only improves the rigidity of the lower box of the battery, but also avoids damage to the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the cover plate of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the flow channel plate of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the bracket of the utility model.

[0022] Figure 5 It is a structural schematic diagram of the reinforced crossbeam of the utility model.

[0023] Figure 6 This is a structural detail diagram of the reinforced beam of the utility model.

[0024] In the figure, 1, liquid cooling plate, 101, flow channel plate, 102, cover plate, 103, liquid inlet joint, 104, liquid outlet joint, 105, module mounting beam, 106, downward protrusion, 2, bracket, 201, side longitudinal beam, 202, middle beam, 203, front beam, 204, rear beam, 205, bottom guard plate, 206, welding nut, 3, reinforcement beam, 301, beam, 302, protruding part. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0027] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be the usual meanings understood by people with general skills in the technical field to which the utility model belongs. The meaning of "multiple" used in the patent application specification and claims of this utility model is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the utility model without substantial changes in the technical content.

[0028] The present invention is further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0029] This embodiment provides a liquid-cooled battery lower box, such as Figure 1 As shown, it includes a liquid cooling plate 1 and a bracket 2, wherein the liquid cooling plate 1 is arranged on the top of the bracket 2, and the liquid cooling plate 1 includes a flow channel plate 101 and a cover plate 102. Figure 2 As shown, the cover plate 102 is arranged directly above the flow channel plate 101, and the upper end surface of the cover plate 102 is used to place the battery module. Figure 3 As shown, the flow channel plate 101 is provided with downward protrusions 106 arranged in a serpentine shape at the downward projection of the battery module except the edge area, and a continuous cooling flow channel area is formed between the downward protrusions 106 and the cover plate 102 .

[0030] The liquid inlet joint 103 and the liquid outlet joint 104 of the downward protrusion 106 are both arranged at the edge of the flow channel plate 101. The cover plate 102 and the flow channel plate 101 are fixedly connected by two longitudinally arranged module mounting beams 105, and the module mounting beams 105 are arranged at the outer periphery of the downward protrusion 106 of the cover plate 102 and the flow channel plate 101.

[0031] like Figure 4 As shown, the bracket 2 includes a bottom guard plate 205, a front cross beam 203 and a rear cross beam 204. The two ends of the front cross beam 203 and the rear cross beam 204 are fixedly connected by the side longitudinal beam 201. The bottom guard plate 205 is arranged at the bottom of the front cross beam 203 and the rear cross beam 204. The upper end surfaces of the side longitudinal beam 201, the middle beam 202, the front cross beam 203 and the rear cross beam 204 are flush, and the side longitudinal beam 201 is provided with a hoisting installation hole. The inner side of the side longitudinal beam 201 is provided with a welding nut 206.

[0032] The middle parts of the front cross beam 203 and the rear cross beam 204 are fixedly connected by the middle beam 202, and a plurality of reinforcing cross beams 3 are longitudinally arranged on the middle beam 202. Figure 5 As shown, the reinforcing crossbeam 3 includes a crossbeam 301, the crossbeam 301 is a multi-layer folded structure in the horizontal direction, and the lower end surface of the crossbeam 301 is surface-connected with the bracket 2. A plurality of protruding parts 302 are provided on the upper end surface of the crossbeam 301. Figure 6 As shown, the upper end surface of the protruding component 302 is flush with the upper end surface of the bracket 2 , and the upper end surface of the protruding component 302 is in contact with the non-cooling channel area of ​​the liquid cooling plate 1 .

[0033] The liquid cooling plate 1 and the bracket 2 are connected and fixed by rivet nuts on all sides, and the upper end surface of the middle beam 202 is fixedly connected to the liquid cooling plate 1 by a buffer medium.

[0034] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0035] The above is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid-cooled battery pack lower box, characterized in that: The invention comprises a liquid cooling plate (1) and a bracket (2), wherein the liquid cooling plate (1) is arranged on the top of the bracket (2), and the upper end surface of the liquid cooling plate (1) is used to place a battery module; a plurality of reinforcing beams (3) are longitudinally arranged in the cavity of the bracket (2), and the reinforcing beams (3) comprise beams (301); the beams (301) have a multi-layer folded structure in a horizontal direction, the lower end surface of the beams (301) is surface-connected with the bracket (2), and the upper end surface of the beams (301) is provided with a plurality of protruding parts (302), and the protruding parts (302) are fitted and supported with the non-cooling channel area of ​​the liquid cooling plate (1).

2. The lower box of a liquid-cooled battery pack according to claim 1, characterized in that: The liquid cooling plate (1) comprises a flow channel plate (101) and a cover plate (102), wherein the cover plate (102) is arranged directly above the flow channel plate (101), and the flow channel plate (101) is provided with downward protrusions (106) arranged in a serpentine shape at the downward projection of the battery module except for the edge region, and a continuous cooling flow channel region is formed between the downward protrusions (106) and the cover plate (102).

3. The lower box of a liquid-cooled battery pack according to claim 2, characterized in that: The downwardly protruding (106) liquid inlet joint (103) and the liquid outlet joint (104) are both arranged at the edge of the flow channel plate (101).

4. The lower box of a liquid-cooled battery pack according to claim 3, characterized in that: The upper end surface of the raised component (302) is flush with the upper end surface of the bracket (2), and the upper end surface of the raised component (302) is in contact with the non-cooling flow channel area of ​​the liquid cooling plate (1).

5. The lower box of a liquid-cooled battery pack according to claim 2, characterized in that: The cover plate (102) and the flow channel plate (101) are fixedly connected via two longitudinally arranged module mounting beams (105), and the module mounting beams (105) are arranged at the periphery of the downward protrusions (106) of the cover plate (102) and the flow channel plate (101).

6. The lower box of a liquid-cooled battery pack according to claim 1, characterized in that: The bracket (2) comprises a bottom guard plate (205), a front crossbeam (203) and a rear crossbeam (204); both ends of the front crossbeam (203) and the rear crossbeam (204) are fixedly connected via side longitudinal beams (201); and the bottom guard plate (205) is arranged at the bottom of the front crossbeam (203) and the rear crossbeam (204).

7. The lower box of a liquid-cooled battery pack according to claim 6, characterized in that: The middle parts of the front cross beam (203) and the rear cross beam (204) are fixedly connected via an intermediate beam (202), and the reinforcing cross beam (3) is arranged on the intermediate beam (202).

8. The lower box of a liquid-cooled battery pack according to claim 7, characterized in that: The liquid cooling plate (1) and the bracket (2) are connected and fixed around each other by rivet nuts, and the upper end surface of the middle beam (202) and the liquid cooling plate (1) are fixedly connected by a buffer medium.

9. The lower box of a liquid-cooled battery pack according to claim 6, characterized in that: The upper end surfaces of the side longitudinal beams (201), the middle beam (202), the front cross beam (203) and the rear cross beam (204) are flush, and the side longitudinal beams (201) are provided with hoisting installation holes.

10. The lower box of a liquid-cooled battery pack according to claim 6, characterized in that: A welding nut (206) is provided inside the side longitudinal beam (201).

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