Double-module battery tray and battery pack

Abstract

The utility model discloses a double-module battery tray and a battery pack, and relates to the technical field of battery cell trays. The double-module battery tray specifically comprises a lower-layer box body which is provided with an accommodating cavity for accommodating a battery cell, and a first stamping cold plate which covers the bottom of the accommodating cavity and is used for cooling the battery cell is arranged at the bottom of the accommodating cavity; the two sides of the second stamping cold plate in the length direction are provided with supporting walls for limiting the displacement of the battery cell; and when the second stamping cold plate is contained in the lower-layer box body, the mounting beam is mounted on the side wall of the lower-layer box body, so that the second stamping cold plate is supported, and interference of the mounting beam on the lower-layer box body during assembly is avoided. According to the double-layer module battery tray, interference between double modules is avoided, meanwhile, the number of switching accessories is reduced, and the space utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery trays, in particular to a dual-module battery tray and a battery pack. Background Art

[0002] In the new energy vehicle industry, the power battery pack is a key component, and its performance directly impacts the vehicle's operating range, energy efficiency, and overall performance. In recent years, with the rapid development of the electric vehicle market, higher requirements have been placed on the energy density and space utilization of power battery packs. Traditional power battery packs mostly use a single-layer module design, which to some extent limits further improvements in energy density and also affects the effective use of space.

[0003] With the optimization of vehicle body structures and advancements in design technology, some OEMs are adopting a double-layer module PACK structure to carry more energy, improve energy density, and enhance vehicle range. This double-layer module PACK structure offers significant advantages over single-layer designs in terms of strength, cooling, insulation, and thermal runaway control. The double-layer module design maintains temperature stability during battery operation through heat dissipation and insulation, effectively enhancing the battery's safe operation.

[0004] However, in actual production and application, the existing double-layer module design faces considerable challenges. Due to the space limitations between the modules, the modules often interfere with each other during installation, affecting the assembly efficiency between the double-layer modules. This interference not only complicates the assembly process, but also increases production costs, and may lead to inaccurate assembly, thereby affecting the performance and reliability of the entire power battery pack. At the same time, the double-layer module design of the existing technology mainly includes an integration method of the module and the cold plate, which is supported and fixed by a bracket, and the cold plate is then locked with the crossbeam or the end plate of the lower module. This design requires a large number of accessories such as water pipes and adapters for the circulation of coolant. A certain amount of space must be reserved for accessories inside the PACK, which further reduces the available space. In addition, the second layer of the module is supported and fixed by a variety of brackets, which occupies a large space and also makes the structure more complicated.

[0005] Therefore, in a double-layer module battery tray, how to avoid interference between the two modules while reducing the number of adapter accessories and improving space utilization has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] The main purpose of the utility model is to provide a dual-module battery tray and a battery pack, aiming to avoid interference between the dual modules in the double-layer module battery tray while reducing the number of adapter accessories and improving space utilization.

[0007] In order to achieve the above objectives, the present invention provides a dual-module battery tray, comprising:

[0008] The lower box body has a receiving cavity for accommodating the battery cell, and the bottom of the receiving cavity is provided with a first stamped cold plate covering the bottom of the receiving cavity for cooling the battery cell;

[0009] A second stamped cold plate, wherein both sides of the second stamped cold plate in the length direction are provided with support walls for limiting the displacement of the battery cells; and

[0010] The mounting beam is installed on the side wall of the lower box body when the second stamped cold plate is accommodated in the lower box body to support the second stamped plate, so as to avoid interference of the mounting beam with the lower box body during assembly.

[0011] In one embodiment of the present application, at least one support beam is further provided on the side wall of the lower box body; when there are two support beams, the two support beams are arranged opposite to each other, and when the battery cell is placed in the accommodating cavity, the two ends of the battery cell are respectively locked on the oppositely arranged support beams.

[0012] In one embodiment of the present application, a first partition plate is further provided in the lower box body for dividing the accommodating cavity into a plurality of accommodating spaces. When the second stamped cold plate is received in the accommodating cavity, the top of the first partition plate abuts against the bottom of the second stamped cold plate.

[0013] In one embodiment of the present application, the first partition plate is provided with an exhaust gap for facilitating the passage of gas when the battery cell experiences thermal runaway.

[0014] In one embodiment of the present application, the accommodating space can accommodate two battery cells arranged in parallel.

[0015] In one embodiment of the present application, a plurality of supporting strips are provided at the bottom of the second stamped cold plate for supporting the second stamped cold plate. When the second stamped cold plate is placed in the accommodating cavity, the supporting strips abut against the first dividing plate.

[0016] In one embodiment of the present application, the supporting strip is supporting foam.

[0017] In one embodiment of the present application, a second dividing plate is provided between the support walls to divide the second stamped cold plate into a plurality of areas.

[0018] In one embodiment of the present application, the first partition plate and the lower box body are connected by screws.

[0019] The present application also discloses a battery pack comprising a dual-module battery tray as described above.

[0020] By adopting the above technical solution, the mounting beam and the lower box body are connected in a detachable manner, which reduces the complexity and difficulty of assembly, improves production and assembly efficiency, and reduces production costs; at the same time, the present application adopts a cold plate for cooling, which reduces the use of series water pipes, adapters, and second-layer support brackets and other components of the profile cold plate, eliminating the problems that may be caused by these components during assembly and maintenance, and reducing the volume and weight of the battery pack, thereby improving the utilization of space and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the overall side cross-sectional structure of the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the lower box body of the first embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the combined structure of the second stamped cold plate, the support wall, and the second dividing plate of the first embodiment of the utility model;

[0025] Figure 4 for Figure 3 Bottom view of

[0026] 10. Lower box body; 11. First stamped cold plate; 12. Support beam; 13. First partition plate; 14. Exhaust notch; 20. Second stamped cold plate; 21. Support wall; 22. Second partition plate; 23. Support strip; 30. Mounting beam; 40. Battery cell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0028] like Figures 1 to 4 As shown, in order to achieve the above purpose, the present invention proposes a dual-module battery tray, comprising:

[0029] The lower box body 10 has a receiving cavity for accommodating the battery cell 40 , and a first stamped cold plate 11 covering the bottom of the receiving cavity for cooling the battery cell 40 is provided at the bottom of the receiving cavity;

[0030] A second stamped cold plate 20 , with support walls 21 provided on both sides of the second stamped cold plate 20 in the longitudinal direction for limiting the displacement of the battery cells 40 ; and

[0031] The mounting beam 30 is installed on the side wall of the lower box body 10 when the second stamped cold plate 20 is accommodated in the lower box body 10 to support the second stamped plate to avoid interference of the mounting beam 30 with the lower box body 10 during assembly.

[0032] Specifically, the present invention provides a dual-module battery tray, which is mainly composed of three parts: a lower box body 10 , a second stamped cold plate 20 and a mounting beam 30 .

[0033] The lower case 10 is the primary structural component of the battery tray and contains a cavity for accommodating the battery cells 40. To effectively maintain the operating temperature of the battery cells 40 and enhance battery safety and performance, a first stamped cold plate 11 is installed at the bottom of the cavity. This covers the bottom of the cavity and cools the battery cells 40 via a cooling system. The first stamped cold plate 11 is connected to the lower case 10 via friction stir welding (FSW) or FDS.

[0034] The second stamped cold plate 20 can be stored inside the lower box body 10. The second stamped cold plate 20 is provided with support walls 21 on both sides in the length direction for limiting the displacement of the battery cell 40. The support wall 21 and the second stamped cold plate 20 are connected in a fixed manner, such as welding. The fixed connection can improve the connection strength between the support wall 21 and the second stamped cold plate 20. Of course, according to design requirements, the support wall 21 and the second stamped cold plate 20 can also be connected in a detachable manner, such as screw connection, bolt connection, etc. The detachable connection can facilitate the installation and disassembly of the support wall 21 and facilitate subsequent maintenance. The support wall 21 serves to limit unnecessary movement of the battery cell 40 and provide additional physical protection to ensure the stability and safety of the battery.

[0035] When the second stamped cold plate 20 is housed within the lower case 10, the mounting beams 30 are first installed on the side walls of the lower case 10. The mounting beams 30 primarily support the second stamped plate, enabling it to operate stably within the lower case 10. When the second stamped cold plate 20 is not placed within the lower case 10, the mounting beams 30 are separated from the lower case 10, thus preventing interference with the lower case 10 during assembly. This design improves battery tray assembly efficiency and reduces assembly errors.

[0036] By adopting the above technical solution, the mounting beam 30 and the lower box body 10 are connected in a detachable manner, which reduces the complexity and difficulty of assembly, improves production and assembly efficiency, and reduces production costs; at the same time, the present application adopts a cold plate for cooling or insulation, reducing the use of series water pipes, adapters, and second-layer support brackets and other components of the profile cold plate, eliminating the problems that these components may cause during assembly and maintenance, and reducing the volume and weight of the battery pack, thereby improving the utilization of space and energy.

[0037] In one embodiment of the present application, at least one support beam 12 is further provided on the side wall of the lower box body 10; when there are two support beams 12, the two support beams 12 are arranged opposite to each other, and when the battery cell 40 is placed in the accommodating cavity, the two ends of the battery cell 40 are respectively locked on the oppositely arranged support beams 12.

[0038] Specifically, at least one support beam 12 is installed on the side wall of the lower box body 10. The number of support beams 12 can be one or more. In this application, "more" means two or more. In this application, two are used as an example. When there are two support beams 12, these two support beams 12 will be arranged at relative positions on the side wall of the lower box body 10 to form a stable support structure. Preferably, the length direction of the two support beams 12 is consistent with the length direction of the lower box body 10. When the battery cell 40 is placed in the accommodating cavity, the two ends of the battery cell 40 will be respectively locked on the relatively arranged support beams 12. Thereby, the displacement of the battery cell 40 during use can be prevented, the stable operation of the battery cell 40 is ensured, and the service life of the battery cell 40 and the battery performance are improved.

[0039] By adopting the above technical solution, a support beam 12 is installed on the side wall of the lower box body 10, which provides additional support and locking functions for the battery cell 40 placed in the accommodating cavity, ensuring the stable operation of the battery cell 40. The structure is simple and easy to implement.

[0040] In one embodiment of the present application, a first partition plate 13 is further provided in the lower box body 10 for dividing the accommodating cavity into a plurality of accommodating spaces. When the second stamped cold plate 20 is received in the accommodating cavity, the top of the first partition plate 13 abuts against the bottom of the second stamped cold plate 20.

[0041] Specifically, when the second stamped cold plate 20 is housed in the accommodating cavity, the top of the first partition plate 13 abuts the bottom of the second stamped cold plate 20. In addition to separating the battery cells 40, the first partition plate 13 also provides additional support for the second stamped cold plate 20, thereby enhancing the stability of the entire battery case structure. Furthermore, the combination of the partition plate and the cold plate improves the efficiency of heat exchange during the cooling process of the battery cells 40.

[0042] The above-described technical solution, combining the second stamped cold plate 20 with the first partition plate 13, provides additional strength and structural stability to the entire battery case. The presence of the first partition plate 13 creates cooling channels that more efficiently dissipate heat, helping to extend the lifespan of the battery cells 40. Through the meticulous division of internal space, the battery case can more effectively manage and protect each battery cell 40, maximizing space efficiency.

[0043] In one embodiment of the present application, the first partition plate 13 is provided with an exhaust notch 14 for facilitating the passage of gas when the battery cell 40 experiences thermal runaway.

[0044] With this technical solution, thermal runaway refers to a phenomenon in which uncontrolled reactions within the battery lead to overheating and a rapid temperature rise, which can, in severe cases, cause the battery to explode. Venting notches 14 are provided on the first partition plate 13. If thermal runaway occurs, these notches 14 quickly guide overheated gases out of the battery tray, minimizing damage to the batteries and other components of the tray.

[0045] In one embodiment of the present application, the accommodating space can accommodate two battery cells 40 arranged in parallel.

[0046] Specifically, the accommodating space can be used to accommodate two battery cells 40 arranged in parallel. The two battery cells 40 installed in the same accommodating space are regarded as a battery cell 40 group. There is no need to set a first partition plate 13 between the two battery cells 40 in a battery cell 40 group. Therefore, without reducing the strength of the dual-module battery tray, the number of first partition plates 13 used is reduced, the production cost is reduced, and the assembly efficiency is improved.

[0047] In one embodiment of the present application, a plurality of supporting strips 23 are provided at the bottom of the second stamped cold plate 20 for supporting the second stamped cold plate 20 . When the second stamped cold plate 20 is placed in the accommodating cavity, the supporting strips 23 abut against the first dividing plate 13 .

[0048] Specifically, a plurality of support strips 23 are provided at the bottom of the second stamped cold plate 20 to enhance and maintain the stability of the second stamped cold plate 20. When the second stamped cold plate 20 is placed in the accommodating cavity, the support strips 23 will tightly abut against the first partition plate 13 in the lower box body 10.

[0049] With the above technical solution, since the overall strength of the second stamped cold plate 20 is relatively weak, in order to prevent deformation of the stamped cold plate, the support strips 23 are provided to support the stamped cold plate, thereby improving the overall strength. The structure is simple and easy to implement.

[0050] In one embodiment of the present application, the supporting strip 23 is supporting foam.

[0051] In one embodiment of the present application, a second dividing plate 22 is provided between the support walls 21 to divide the second stamped cold plate 20 into a plurality of areas.

[0052] By adopting the above technical solution, the provision of the second partition plate 22 increases the mechanical strength of the entire battery pack, making the cold plate itself more stable when subjected to external forces, and reducing the risk of damage caused by vibration or impact.

[0053] In one embodiment of the present application, the first partition plate and the lower box body are connected by screws.

[0054] The present application also discloses a battery pack comprising a dual-module battery tray as described above.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dual-module battery tray, characterized in that: include: The lower box body has a receiving cavity for accommodating the battery cell, and the bottom of the receiving cavity is provided with a first stamped cold plate covering the bottom of the receiving cavity for cooling the battery cell; A second stamped cold plate, wherein both sides of the second stamped cold plate in the length direction are provided with support walls for limiting the displacement of the battery cells; and The mounting beam is installed on the side wall of the lower box body when the second stamped cold plate is accommodated in the lower box body to support the second stamped cold plate and avoid interference of the mounting beam with the lower box body during assembly.

2. The dual-module battery tray according to claim 1, wherein: At least one support beam is further provided on the side wall of the lower box body; when there are two support beams, the two support beams are arranged opposite to each other, and when the battery cell is placed in the accommodating cavity, the two ends of the battery cell are respectively locked on the oppositely arranged support beams.

3. The dual-module battery tray according to claim 1, wherein: The lower box body is further provided with a first dividing plate for dividing the accommodating cavity into a plurality of accommodating spaces. When the second stamped cold plate is received in the accommodating cavity, the top of the first dividing plate abuts against the bottom of the second stamped cold plate.

4. The dual-module battery tray according to claim 3, wherein: The first partition plate is provided with an exhaust notch for facilitating the passage of gas when the battery cell experiences thermal runaway.

5. The dual-module battery tray according to claim 3, wherein: The accommodating space can accommodate two battery cells arranged in parallel.

6. The dual-module battery tray according to claim 3, wherein: A plurality of supporting strips for supporting the second stamped cold plate are provided at the bottom of the second stamped cold plate. When the second stamped cold plate is placed in the accommodating cavity, the supporting strips abut against the first dividing plate.

7. The dual-module battery tray according to claim 6, wherein: The supporting strip is supporting foam.

8. The dual-module battery tray according to claim 1, wherein: A second dividing plate is provided between the support walls to divide the second stamped cold plate into a plurality of areas.

9. The dual-module battery tray according to claim 3, wherein: The first partition plate is connected to the lower box body by screws.

10. A battery pack, characterized in that: Comprising a dual-module battery tray as described in any one of claims 1 to 9.

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