CTC battery tray and battery pack

Abstract

The utility model discloses a CTC battery tray and a battery pack, and relates to the field of battery packs. A CTC battery tray comprises a tray body and a tray upper cover connected to the tray body in a covering mode. The seat support is fixedly arranged on the tray body; the tray body comprises a surrounding plate and a bottom plate, and a cross beam is arranged between the surrounding plate and the bottom plate; the bottom plate comprises an upper-layer plate, a lower-layer plate and a grid structure connected between the upper-layer plate and the lower-layer plate, and a heat management structure is integrated on the grid structure; according to the utility model, the structural complexity of the whole vehicle is reduced, the number of related parts of the whole vehicle is reduced, and the hierarchical cost reduction and efficiency improvement of the whole vehicle are realized; by utilizing the mortise and tenon principle, the length and the number of welding seams are reduced while the structural strength is guaranteed, the product quality is effectively guaranteed, and the cost is reduced; and meanwhile, a thermal management system is integrated in the battery tray, so that the internal space can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a CTC battery tray and a battery pack. Background Art

[0002] Traditional electric vehicles are generally converted from fuel vehicles. Due to the limitations of the vehicle body structure, the space and volume for arranging the battery box are limited.

[0003] The forward development of electric vehicles can maximize the use of the space of the whole vehicle, and more batteries can be arranged to ensure the driving range and reduce mileage and charging anxiety; generally, the battery system consists of battery modules, battery boxes, BMS, BDU and other high and low voltage components and wiring harnesses. In order to further improve the integration efficiency of batteries into the whole vehicle and reduce costs, the existing technology has introduced a CTP solution that directly integrates the battery cells into the whole package, that is, the battery cells are directly fixed to the battery box by bonding and other methods, eliminating the various parts and manufacturing costs required from the battery cells to the module; however, the CTP grouping battery system still requires vehicle-related structural parts and mechanisms for fixed bearing, which cannot reduce the vehicle-related parts and components, and cannot achieve vehicle-level cost reduction.

[0004] In view of this, the present application proposes a CTC battery tray and battery pack that are directly integrated from the battery cells to the overall chassis to solve the problems existing in the prior art. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a CTC battery tray and battery pack that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a CTC battery tray, comprising:

[0007] A tray body and a tray cover connected to the tray body;

[0008] A seat support is fixedly arranged on the tray body;

[0009] The pallet body comprises a surrounding plate and a bottom plate, and a crossbeam is provided between the surrounding plate and the bottom plate;

[0010] The bottom plate includes an upper plate, a lower plate, and a grid structure connected between the upper plate and the lower plate, and a heat management structure is integrated on the grid structure.

[0011] Preferably, there are multiple cross beams, and both ends of the seat support are fixedly connected to two cross beams respectively. A seat fixing frame is provided on the seat support, and corresponding seat fixing holes are provided on the seat fixing frame and the tray cover.

[0012] Furthermore, four seat fixing frames are provided, and the four seat fixing frames are used to fix the front seats and the rear seats respectively.

[0013] Preferably, the enclosure is composed of a front beam, a rear beam, a left beam and a right beam, the bottoms of the front beam, the rear beam, the left beam and the right beam are all connected to the bottom plate, the front beam is spliced ​​with the left beam and the right beam, and the rear beam is connected with mortise and tenon joints.

[0014] Furthermore, both ends of the rear beam are provided with mortise bodies, the end faces of the mortise bodies are inner side faces, and the left beam and the right beam are provided with tenons and tenon shoulders. When connected, the tenons overlap the mortise bodies, and the tenon shoulders abut against the inner side faces.

[0015] Furthermore, two ends of the cross beam are embedded in T-shaped reinforcing plates, and two sides of the T-shaped reinforcing plates respectively abut against inner walls of the left beam and the right beam.

[0016] A battery pack includes a CTC battery tray, wherein a battery cell assembly A and a battery cell assembly B are arranged in the tray body.

[0017] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: in the utility model, the battery cell unit is directly integrated at the bottom of the battery tray, the upper cover of the battery tray is integrated with the bottom plate of the whole vehicle, and the seat fixing structure of the whole vehicle is also integrated, which greatly reduces the structural complexity of the whole vehicle, reduces the number of parts related to the whole vehicle, and realizes cost reduction and efficiency improvement at the vehicle level; moreover, the manufacturing process of the battery tray utilizes the mortise and tenon principle, which ensures the structural strength while reducing the length and number of welds, effectively ensuring product quality and reducing costs; at the same time, the battery tray has an integrated thermal management system, which helps to save internal space. During the manufacturing process, the battery tray can also be used as a load-bearing tooling, and after the battery cell assembly is glued and fixed, it is heated through thermal management to shorten the standing time, thereby minimizing the process time and improving the value flow.

[0018] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached picture:

[0020] Figure 1 This is a structural schematic diagram of a CTC battery tray proposed by the utility model;

[0021] Figure 2A schematic diagram of the structure of a battery pack proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a tray body in a CTC battery tray proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the overlap between the left beam, the right beam and the rear beam in a CTC battery tray proposed by the utility model;

[0024] Figure 5 This is a schematic structural diagram of a bottom plate in a CTC battery tray proposed in the utility model.

[0025] In the figure: 100, tray body; 110, front beam; 120, rear beam; 121, mortise; 122, inner side; 130, left beam; 140, right beam; 141, tenon; 142, tenon shoulder; 150, bottom plate; 151, upper plate; 152, lower plate; 153, grid structure; 160, cross beam; 170, T-shaped reinforcement plate; 200, seat support; 300, seat fixing frame; 310, seat fixing hole; 400, tray cover; 500, battery cell assembly A; 600, battery cell assembly B. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model. Example

[0027] Reference Figure 1-Figure 5 A CTC battery tray includes a tray body 100 and a tray cover 400 connected to the tray body 100, a seat support 200 is fixedly arranged on the tray body 100, the tray body 100 includes a surrounding plate and a bottom plate 150, a crossbeam 160 is arranged between the surrounding plate and the bottom plate 150; the bottom plate 150 includes an upper plate 151, a lower plate 152 and a grid structure 153 connected between the upper plate 151 and the lower plate 152, and a thermal management structure is integrated on the grid structure 153.

[0028] In the utility model, four seat fixing frames 300 are provided, and the four seat fixing frames 300 are used to fix the front seats and the rear seats respectively; the four seat fixing frames 300 are included, wherein the two seat fixing frames 300 located at the front section are used to fix the front seats, and the two seat fixing frames 300 at the rear section are used to fix the rear seats; the seat fixing frames 300 are fixed to the battery tray body 100 through the seat supports 200, and at the same time, the seat fixing frames 300 have seat fixing holes 310 connected to the tray cover 400, so that the seats of the whole vehicle are directly fixed to the tray body 100, and the CTC battery tray is directly integrated with the whole vehicle, which can not only save the structural cost of the whole vehicle, but also improve the overall strength and rigidity of the whole vehicle structure.

[0029] The bottom plate 150 of the battery tray is composed of an upper plate 151, a lower plate 152 and a middle grid structure 153; the traditional battery system includes a battery module, the battery module includes a module plate, and a layer of module plate is separated between the battery cell and the thermal management system, and the thermal management system is arranged in the battery case as a separate structure, which also occupies a large amount of space. In the present application, the thermal management structure is integrated in the middle grid structure 153. Because the thermal management structure is separated from the bottom of the battery cell by only an upper plate 151 of the bottom plate 150, the thermal management efficiency of the battery pack including the CTC battery tray is much higher than that of the traditional battery system.

[0030] Moreover, a further benefit is that the CTC battery tray can be used as a conversion tool for placing battery cell assemblies, that is, thermal conductive structural adhesive is first applied to the inside of the battery tray, and after the battery cell assembly A500 and the battery cell assembly B600 are placed in the corresponding positions of the battery tray, the bottom plate 150 can be heated by opening the thermal management structure at the bottom of the battery tray, thereby accelerating the curing speed of the thermosetting thermal conductive structural adhesive, thereby saving the static time required for the glue to cure, greatly shortening the process time, and improving the output and efficiency per unit time, that is, improving the value flow.

[0031] It should be noted that the thermal management structure in the present application is a prior art, which refers to the effective control and management of the temperature and heat distribution inside the battery pack through a series of thermal management technologies and devices to ensure the safe and stable operation of the battery pack, which can be achieved by using the structure in the prior art. What is protected in the present application is the upper plate 151 which is separated from the bottom of the battery cell by only a bottom plate 150. Therefore, the thermal management efficiency of the battery pack including the CTC battery tray is much higher than that of the traditional battery system.

[0032] There are multiple cross beams 160, and the two ends of the seat support 200 are fixedly connected to the two cross beams 160 respectively. A seat fixing frame 300 is provided on the seat support 200, and corresponding seat fixing holes 310 are provided on the seat fixing frame 300 and the tray cover 400; the enclosure is composed of a front beam 110, a rear beam 120, a left beam 130 and a right beam 140, and the bottoms of the front beam 110, the rear beam 120, the left beam 130 and the right beam 140 are all connected to the bottom plate 150, the front beam 110 and the left beam 130 and the right beam 140 are spliced, and the rear beam 120 and the left beam 130 and the right beam 140 are connected by mortise and tenon joints.

[0033] Both ends of the cross beam 160 are embedded in the T-shaped reinforcing plate 170 , and both sides of the T-shaped reinforcing plate 170 respectively abut against the inner walls of the left beam 130 and the right beam 140 .

[0034] The CTC battery tray is composed of a front beam 110, a rear beam 120, a left beam 130 and a right beam 140, a bottom plate 150, a cross beam 160 and a T-shaped reinforcement plate 170; all components are extruded and machined from aluminum alloy profiles; the mortise and tenon principle is used, and then fixed by welding and gluing.

[0035] Mortises 121 are provided at both ends of the rear beam 120, and the end faces of the mortises 121 are the inner side faces 122. Tenons 141 and tenon shoulders 142 are provided on the left beam 130 and the right beam 140. When connected, the tenons 141 overlap the mortises 121, and the tenon shoulders 142 abut against the inner side faces 122.

[0036] Specifically, the front beam 110 is assembled with the left beam 130 and the right beam 140; the rear beam 120 is overlapped with the left beam 130 and the right beam 140; the enclosure and the bottom plate 150 are assembled; both ends of the cross beam 160 are embedded in the T-shaped reinforcement plate 170, which is against the inner wall of the left beam 130 and the right beam 140 as a whole, and then fixed on the periphery by intermittent welding and gluing. The benefit of adding the T-shaped reinforcement plate 170 to fix multiple cross beams 160 with the left beam 130 and the right beam 140 is that the welding area and area are effectively increased to prevent the stress concentration of the outgoing welding; accordingly, the cross beam 160 and the bottom plate 150 are also fixed by intermittent welding and gluing, and there is a gap between the T-shaped reinforcement plate 170 and the bottom plate 150 to facilitate the structural adhesive to enter the gap for bonding and fixing.

[0037] The rear beam 120 of the enclosure mechanism of the battery tray is fixed to the left beam 130 and the right beam 140 by using the mortise and tenon principle; Figure 4The figure shows a detailed schematic diagram of the overlapping fixation between the rear beam 120 and the right side beam 140, in which the tenon 141 is overlapped with the mortise 121 on the rear beam 120, that is, the main structure of the rear beam 120 including the outermost stop, and the overlapping position is determined by the tenon shoulder 142 on the right side beam 140 against the inner side surface 122 including the oblique stop on the rear beam 120; therefore, the fixation of the rear beam 120 and the left side beam 130 and the right side beam 140 of the battery tray is changed from the traditional direct overlapping assembly fixation to the mortise and tenon structure, and the tenon 141 and the mortise 121 as well as the tenon shoulder 142 are fixed in a positioning manner, with a larger contact area and range and higher strength; supplemented by high-strength structural glue and necessary welding, the structural stability and reliability of the battery tray enclosure frame are ensured; the finally processed battery tray uses less material and has high strength, which greatly saves costs and improves manufacturability. Example

[0038] Reference Figure 1-Figure 2 A battery pack, a tray body 100 is provided with a battery cell assembly A500 and a battery cell assembly B600. In the utility model, the tray body 100 contains multiple battery cell assemblies A500 and battery cell assemblies B600, and their bottoms are directly bonded to the bottom plate 150 of the battery tray by means of thermal conductive structural adhesive; moreover, both sides of each battery cell assembly A500 and battery cell assembly B600 are fixed together by means of structural adhesive and a left beam 130 and a right beam 140, the battery cell assembly is directly integrated with the battery tray, and the bottom and side surfaces of the battery cells are bonded and fixed to the battery tray structure, which also greatly improves the overall structural strength and rigidity of the battery pack.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A CTC battery tray, characterized in that: include: A tray body (100) and a tray cover (400) connected to the tray body (100); A seat support (200) is fixedly disposed on the tray body (100); The pallet body (100) comprises a surrounding plate and a bottom plate (150), and a crossbeam (160) is provided between the surrounding plate and the bottom plate (150); The bottom plate (150) comprises an upper plate (151), a lower plate (152), and a grid structure (153) connected between the upper plate (151) and the lower plate (152), wherein a heat management structure is integrated on the grid structure (153).

2. A CTC battery tray according to claim 1, characterized in that: A plurality of cross beams (160) are provided, and two ends of the seat support (200) are respectively fixedly connected to two cross beams (160). A seat fixing frame (300) is provided on the seat support (200), and corresponding seat fixing holes (310) are provided on the seat fixing frame (300) and the tray upper cover (400).

3. A CTC battery tray according to claim 2, characterized in that: Four seat fixing frames (300) are provided, and the four seat fixing frames (300) are used to fix the front row seats and the rear row seats respectively.

4. A CTC battery tray according to claim 1, characterized in that: The enclosure plate is composed of a front beam (110), a rear beam (120), a left beam (130) and a right beam (140); the bottoms of the front beam (110), the rear beam (120), the left beam (130) and the right beam (140) are all connected to a bottom plate (150); the front beam (110) is spliced ​​with the left beam (130) and the right beam (140); and the rear beam (120) is connected with the left beam (130) and the right beam (140) by mortise and tenon joints.

5. A CTC battery tray according to claim 4, characterized in that: Both ends of the rear beam (120) are provided with mortises (121), the end faces of the mortises (121) being inner side faces (122), and the left beam (130) and the right beam (140) are provided with tenons (141) and tenon shoulders (142), and when connected, the tenons (141) overlap the mortises (121), and the tenon shoulders (142) abut against the inner side faces (122).

6. A CTC battery tray according to claim 5, characterized in that: Both ends of the crossbeam (160) are embedded in the T-shaped reinforcement plate (170), and both sides of the T-shaped reinforcement plate (170) respectively abut against the inner walls of the left beam (130) and the right beam (140).

7. A battery pack, characterized in that: A CTC battery tray comprising any one of claims 1 to 6, wherein a battery cell assembly A (500) and a battery cell assembly B (600) are arranged in the tray body (100).

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