Corrosion-resistant battery support frame assembly and battery support assembly

Abstract

The utility model discloses a corrosion-resistant battery support frame assembly and a battery support assembly, the corrosion-resistant battery support frame assembly comprises a plurality of frames, the plurality of frames are used for constructing the battery support frame assembly, and the battery support frame assembly comprises at least one first frame and one second frame, the second frame is formed into a rolling frame with an opening section through rolling of a plurality of rolling sections, and the second frame is assembled, spliced and welded to the side wall of the bottom of the first frame in the length direction of the first frame. Roll-in profiles with openings in the same section are adopted, welding beads and welding deformation are reduced through assembling, splicing and welding, the size of the frame is better controlled, and the problems that in an original scheme, electrophoresis cannot be achieved at the gap of a lap joint face, and corrosion exists are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery brackets, and more specifically, to a corrosion-resistant battery bracket frame assembly and a battery bracket assembly. Background Art

[0002] There are multiple types of existing battery bracket frames, mainly including outer frames and middle frames. The outer frames are made of thick plate profiles with the same cross-section as a whole, which are formed into closed roll-formed profiles through multiple roll forming. The side walls of the frames are welded with reinforcing plates at the same time. There are many welds, and the thermal deformation caused by welding is large, and the dimensional accuracy is difficult to control. Due to the limitations of the structural form, electrophoresis is prone to occur at the gap between the frame and the reinforcing plate, and corrosion occurs, resulting in salt spray failure.

[0003] The middle frame also uses thick plate profiles with the same cross-section, which are formed into closed-section rolled profiles through multiple roll forming. The two closed-section rolled profiles are then connected in a back-to-back overlap manner. The overlap surfaces of the connection parts need to be coated with structural adhesive, and some positions need to be riveted. This form requires additional investment in gluing and riveting equipment, increasing production costs. In addition, due to the limited assembly interface, the number of rivets is small, and the overall reinforcement effect is poor. There is also salt spray failure in the back-to-back overlap area of ​​the middle frame. Utility Model Content

[0004] The technical problem to be solved by the utility model is as follows: In view of the above-mentioned defects existing in the prior art, a battery bracket frame assembly is provided, the reinforcement plate of the outer frame is eliminated, and the back-to-back gluing and rotary riveting process of the middle frame is eliminated, so as to reduce the development cost of the product and solve the rust problem of the overlap surface.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a corrosion-resistant battery holder frame assembly, including multiple frames, the multiple frames are used to construct the battery holder frame assembly, the battery holder frame assembly includes at least one first frame and a second frame, the second frame is roll-formed by multiple rolling sections to form an open cross-section roll-formed frame, and the second frame is assembled and welded to the bottom side wall of the first frame along the length direction of the first frame.

[0006] The welding area where the second frame is connected to the first frame forms a welding part, and the welding part is arranged in a continuous or segmented manner. The second frame is assembled and welded on the bottom side wall of the first frame through a plurality of welding parts.

[0007] As a further improvement of the utility model, the battery holder frame assembly is a middle frame, the middle frame includes a first frame and a second frame welded on both sides of its bottom, the second frame is provided with a first rolled section and a fifth rolled section welded to the two side walls of the bottom of the first frame respectively, the connection area between the first rolled section and the side wall of the first frame forms a first welding portion, and the connection area between the fifth rolled section and the other side wall of the first frame forms a second welding portion.

[0008] As a further improvement of the present invention, the first rolled section extends upward toward one end of the first frame to form a first flange, and the first flange is welded to the side wall of the first frame to form a first welding portion; the fifth rolled section extends upward toward the other end of the first frame to form a second flange, and the second flange is welded to the side wall on the other side of the first frame to form a second welding portion.

[0009] As a further improvement of the present invention, the first welding portion and the second welding portion are respectively divided into a plurality of independent welding segments by the first notch and the second notch, and each welding segment can be assembled and welded to be fixed on the side wall of the first frame.

[0010] As a further improvement of the present invention, the second frame is provided with a third rolled section A assembled and welded with the bottom end of the first frame, the first frame is vertically overlapped on the third rolled section A and divides it into two equal sections, and the welding area where the bottom end of the first frame intersects with the third rolled section A forms a plurality of discontinuously distributed third welding portions A.

[0011] As a further improvement of the present invention, the second frame is provided with two third rolled sections B which are assembled and welded with the two sides of the lower part of the first frame respectively. The two third rolled sections B are symmetrically distributed on both sides of the first frame, and the welding area where the two third rolled sections B intersect with the side walls on both sides forms two independent third welding parts B.

[0012] As a further improvement of the utility model, the battery holder frame assembly becomes an outer frame, the outer frame includes a first frame and a second frame welded to one side of its bottom, the second frame is provided with a first rolled section and a third rolled section A respectively welded to the side wall of the first frame, and the connection area between the first rolled section, the third rolled section A and the side wall of the first frame forms a first welding portion and a third welding portion A.

[0013] Another object of the present invention is to provide a battery bracket assembly for installing a battery module, wherein the battery bracket assembly comprises any one of the battery bracket frame assemblies described above.

[0014] Beneficial effects: Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] 1. The improved outer and middle frames eliminate the reinforcement plates and back-to-back lap gluing and riveting processes, which reduces the cost of product development, reduces welds, and solves the rust problem of the lap surface of the middle frame.

[0016] 2. The roll-formed profile with the same cross-section opening is adopted. Compared with the original scheme, the cross-section is simpler, the difficulty of mold and fixture design is greatly reduced, and the number of roller designs is reduced by 20-30 pairs.

[0017] 3. Closed section: Since thick plates are roll-formed, the roll-formed profile has a large unfolded size. At the same time, it is necessary to take into account size control and large-surface shaping. The development of roll-formed molds is difficult, the investment cost is high, and the development cycle is long. After the closed section is changed to an open section, the profile section is simple, the number of roll-formed molds is small, and the cost of roll-formed profile molds can be saved by 50%-60%.

[0018] 4. After the closed mouth is changed to an open mouth, the first frame can be arranged in the best way in advance to greatly improve the material utilization rate, and the material utilization rate of a single frame can be increased by 15%. The development cycle can be greatly reduced compared with the original plan, and can be reduced from one month to 30 days, and the overall development cost can be reduced by 30%-40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A first battery bracket frame structure diagram according to an embodiment of the utility model is shown;

[0020] Figure 2 Another angle structural diagram of the first battery bracket frame according to an embodiment of the utility model is shown;

[0021] Figure 3 A second battery bracket frame structure diagram according to an embodiment of the utility model is shown;

[0022] Figure 4 A third battery bracket frame structure diagram according to an embodiment of the utility model is shown;

[0023] Figure 5 Another angle structural diagram of the third battery bracket frame according to an embodiment of the utility model is shown;

[0024] Figure 6 Another angle structural diagram of the frame of the fourth battery holder according to an embodiment of the utility model is shown.

[0025] Figure 7 This is the outer frame structure diagram of the battery bracket in the original solution;

[0026] Figure 8 This is the structural diagram of the middle frame of the battery bracket in the original scheme.

[0027] Explanation of the symbols in the schematic diagram:

[0028] 1. Embodiment 1:

[0029] 100, first border;

[0030] 200, second border;

[0031] 210, second rolling section;

[0032] 220. The first rolling section:

[0033] 230, first flanging;

[0034] 230', second flanging;

[0035] The third rolling section A;

[0036] 250, first welding part;

[0037] 210', fourth rolling section;

[0038] 220', fifth rolling section;

[0039] 250', second welding part;

[0040] 260, third welding portion A;

[0041] 270, first notch;

[0042] 270', second notch.

[0043] 2. Embodiment 2:

[0044] 100, first border;

[0045] 200, second border;

[0046] 210, second rolling section;

[0047] 220. The first rolling section:

[0048] 230, first flanging;

[0049] 240, third rolling section A;

[0050] 250, first welding part;

[0051] 260. Third welding portion A.

[0052] 3. Embodiment 3;

[0053] 100, first border;

[0054] 200 second border;

[0055] 210, second rolling section;

[0056] 220. The first rolling section:

[0057] 230, first flanging;

[0058] 230', second flanging;

[0059] 240', third rolling section B;

[0060] 250, first welding part;

[0061] 210', fourth rolling section;

[0062] 220', fifth rolling section;

[0063] 250', second welding part;

[0064] 260', third welding portion B;

[0065] 271, the third notch;

[0066] 271', fourth notch.

[0067] 4. Improvement plan:

[0068] 10. Closed plates with the same cross section;

[0069] 11. Reinforcement plate. DETAILED DESCRIPTION

[0070] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and specific implementation methods.

[0071] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 present invention.

[0072] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0073] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0074] As described in the background technology, Figure 7-8 This is a schematic diagram of the structure of the outer frame and the middle frame of the existing structure. Figure 7 The outer frame is made of rolled profiles and reinforced plates welded together. Figure 7 The medium-sized material is formed into a closed plate 10 with the same cross section by multiple roll forming, and then welded with a reinforcing plate 11. Figure 8 The middle frame is made of roll-formed profiles with back-to-back overlap. Figure 8 The medium profile is formed into a plate 10 with a same cross section by multiple roll forming. Two closed roll profiles 10 with the same cross section are then overlapped back to back. The same cross section closed here means that the plate is processed into a profile with a closed cross section by a roll forming process. In order to solve the problems raised in the background technology, the utility model proposes a battery bracket frame assembly.

[0075] A battery support frame assembly includes a first frame 100 and a second frame 200, wherein the second frame is assembled and welded to the side wall of the first frame 100; the first frame 100 can be a plate of different shapes, and the first frame 100 and the second frame 200 are assembled and welded. Regardless of the frame structure of the second frame, the splicing section extending in any direction can be fixedly connected to the side wall of the first frame 100.

[0076] The battery holder frame assembly may include multiple frames, and the multiple frames are used to splice to form the battery holder frame assembly. For example, it includes a first frame 100, a second frame, a third frame and a fourth frame, etc. At least one of the multiple frames has a side wall. For example, when the first frame 100 is a plate, the first frame 100 has two side walls. Each of the remaining frames extends at least one splicing section, and the splicing section is assembled and fixed to the side wall to form the battery holder frame.

[0077] Combination Figure 1-6 A detailed description of the battery bracket frame assembly is provided. Example

[0078] Reference Figure 1-2 To understand the first embodiment, the battery holder frame assembly is a middle frame, which includes a first frame 100 and a second frame 200 assembled and welded on both sides of the bottom of the first frame. The first frame 100 is an irregular flat plate. According to the actual situation of the battery holder assembly, through holes are opened or materials are cut off at necessary places, such as the first through hole 110. Part of the material needs to be cut off at the top contour cutting line of the frame.

[0079] The second frame 200 is welded to both sides of the bottom of the first frame 100 along the length direction of the first frame 100, and the second frame 200 includes a first rolled section 220, and a plurality of first notches 270 arranged at intervals are provided on the first rolled section 220, and the first rolled section 220 extends upward toward one end of the first frame 100 to form a first flange 230, and the first flange 230 is welded to the side wall of the bottom of the first frame 100 to form a first welding portion 250. In different examples, the first rolled section 220 can also be directly welded to the first frame 100 by the free end of the first rolled section 220 toward the first frame 100 to form the first welding portion 250, and the other end of the first rolled section 220 is vertically bent downward and extended to form a second rolled section 210, and the second rolled section 210 is horizontally bent toward the first frame 100 and passes over the bottom of the first frame 100 to reach the other side, forming a third rolled section A 240 perpendicularly intersecting the first frame 100, and the third rolled section A passes over the first frame 100 to reach the other side. 240 extends vertically upward to form a fourth rolled section 210', the fourth rolled section 210' is horizontally bent toward the other side of the first frame to form a fifth rolled section 220', a plurality of second notches 270' (not shown in the figure) arranged at intervals are provided on the fifth rolled section 220', the fifth rolled section 220' extends upward toward one end of the first frame 100 to form a second flange 230', and the second flange 230' is welded to the side wall on the other side of the bottom of the first frame 100 to form a second welding portion 250'.

[0080] The first welding part 250 and the second welding part 250' are separated into several independent welding segments by the first notch 270 and the second notch 270'. Each welding segment can be welded and fixed to the first frame 100. This welding part is intermittently arranged. The separated welding segments play a role of local connection and fixation in the structure. A very long weld is not formed. The segmented assembly welding can effectively control the welding deformation. Each welding segment is heated and cooled separately to reduce the overall deformation.

[0081] refer to Figure 2 In the structure shown, the third rolling section 240A in this example is assembled and welded to the bottom end of the first frame 100, and the welding area where the two are connected is a plurality of discontinuously distributed third welding parts A 260. Through the first welding part 250, the second welding part 250' and the third welding part A 260, the second frame 200 is assembled, assembled and welded on the first frame 100 to construct the middle frame of the battery holder.

[0082] In this structure, the battery holder frame assembly becomes the middle frame, the first frame 100 uses a thick vertical plate of high-strength steel plate to ensure structural strength, the second frame 200 is formed by high-strength steel roll forming to form two open cross-section roll-formed frames assembled on both sides of the first frame 100, that is, the cross-section of the second frame is not closed, the first flange 230 and the third flange 230' are at a certain distance, and then the first welding part 250 and the second welding part 250' are welded to the first frame 100, the open frame and the first frame 100 are assembled and welded, the back-to-back lap structure used in the middle frame of the original structure is cancelled, the gluing process of the back-to-back joint surface is cancelled, and the rotary riveting process is also cancelled, the investment in gluing and rotary riveting equipment is reduced, and the cost reduction of product development can be achieved; at the same time, it can also solve the corrosion problem of the lap surface of the middle frame and improve the service life of the product.

[0083] In this embodiment, there are fewer welding parts, and the assembly welding is completed through the intermittently connected first welding part, second welding part and third welding part A, which can effectively reduce the thermal deformation generated during the welding process, making it easier to control the dimensional accuracy and improve the product qualification rate.

[0084] In addition, the original closed structure is a complex cross-section formed in one step, and the closed cross-section is formed repeatedly through the rolling process. After roll forming, the holes are processed, such as the first through hole on the first frame is processed by removing material, and the holes cannot be pre-filled (limited by the profile roll forming process, pre-filling will cause deformation of the holes and flanges). Some holes need to be machined after roll forming, which increases the process and cost; a large part of the material of the top contour trimming line of the first frame needs to be cut off, and the cut material cannot be fully utilized under the rolling process, and the material utilization rate is low.

[0085] When changing the closed opening to an open opening, the first frame can be processed separately by laser cutting or die punching, and the parts can be individually arranged and confirmed in advance to increase the maximum utilization rate of the profile, thereby greatly improving the utilization rate of the material. Example

[0086] refer to Figure 3 Compared with the first embodiment, the battery holder frame is an outer frame, and the outer frame includes a first frame 100 and a second frame 200 assembled on one side of the bottom of the first frame.

[0087] like Figure 3As shown, the first frame 100 is not described again here. The second frame 200 is welded to one side of the bottom of the first frame 100 along the length direction of the first frame 100. The second frame 200 includes a first rolled section 220. The first rolled section 220 extends upward toward one end of the first frame 100 to form a first flange 230. The first flange 230 is welded to the side wall of the bottom of the first frame 100 to form a first welding portion 250. The other end of the first rolled section 220 is vertically bent downward and extended to form a second rolled section 210. The second rolled section 210 is horizontally bent toward the first frame 100 to form a third rolled section A 240. The third rolled section A 240 abuts against the side wall of the first frame 100, and the abutting portion forms a third welding portion A 260. The structure of the second frame 200 in this example is basically the same as that of the first embodiment, and only an open rolled frame is provided on one side of the first frame 100. As shown Figure 3 As shown, the third rolling section A 240 intersects with the side wall of the first frame 100 . Specifically, the end of the third rolling section A 240 is flush with the side wall of the first frame 100 .

[0088] In this structure, the battery holder frame assembly becomes the outer frame, the first frame 100 is made of a thick vertical plate of high-strength steel plate, and the second frame 200 is formed by high-strength steel roll forming to form an open cross-section roll-formed frame assembled and welded on one side of the first frame 100. The reinforcement plate in the original structure is eliminated, the number of welds between the reinforcement plate and the frame is reduced, the welding deformation is reduced, the frame size is better controlled, and at the same time, the problem of electrophoresis at the overlap surface gap in the original solution, resulting in rust, can be solved, thereby improving the service life of the product. Example

[0089] refer to Figure 4-5 The battery holder frame is assembled into a middle frame, which includes a first frame 100 and two second frames 200 assembled on both sides of the bottom of the first frame. The first frame 100 in this example is consistent with the structure of the aforementioned embodiment and will not be described here.

[0090] The second frame 200 on one side is described. The second frame 200 includes a first rolling section 220. A plurality of third notches 271 are provided on the first rolling section 220. The first rolling section 220 extends upward toward one end of the first frame 100 to form a first flange 230. The first flange 230 is welded to the side wall at the bottom of the first frame 100 to form a first welding portion 250. A second welding portion 250' is formed at the same position on the other side. The other end of the first rolling section 220 is vertically bent downward to extend to form a second rolling section 210. The second rolling section 210 is horizontally bent toward the first frame 100 to form a third rolling section B 240' intersecting with the side wall of the first frame. The welding area where the third rolling section B 240' intersects with the side wall forms a third welding portion B 260'. The difference from the first embodiment is that the third rolling section B 240' is separated into two parts by the first frame 100, and is respectively assembled and welded with the lower part of the corresponding first frame side wall, forming two independent third welding parts B 260'. The second frame 200 on the other side has a similar structure. The third rolling section B 240' on the other side is bent and vertically extended upward to form a fourth rolling section 210'. The fourth rolling section 210' is horizontally bent toward one side of the first frame to form a fifth rolling section 220'. The fifth rolling section 220' extends upward toward one end of the first frame 100 to form a second flange 230'. The second flange 230' is welded to the side wall at the bottom of the first frame 100 to form a second welding part 250'. The fifth rolling section 220' is also provided with a plurality of fourth notches 271' (not shown in the figure).

[0091] The processing hole positions of each rolling section of the second frame 200 may be different, which is selected according to actual conditions. There are two third welding parts B 260', which are assembled and welded on both sides of the lower side wall of the first frame along the length direction of the first frame 100, and are continuous welds.

[0092] This structure is roughly the same as that of the first embodiment. Two second frames 200 are provided, each of which forms two welding parts with the first frame 100, with a total of four welding parts on both sides. The third notch 271 and the fourth notch 271' do not divide the first welding part 250 and the second welding part 250', and keep the weld bead as a continuous weld bead. The four welding parts can all be continuous weld beads. The two second frames 200 are open cross-section frames formed by high-strength steel roll forming. The two open cross-section frames are assembled and welded on both sides of the first frame 100 through four welding parts. Example

[0093] refer to Figure 6 As shown, the battery holder frame is an outer frame, which includes a first frame 100 and a second frame 200. The second frame 200 is assembled and welded on one side of the first frame 100. The specific welding assembly method is consistent with the aforementioned third embodiment and will not be repeated.

[0094] In any of the aforementioned embodiments, the first frame 100 can be made of 8mm steel plate, and the closed roll-formed profile is changed to an open roll-formed profile. After the reinforcement plate and the back-to-back overlap structure are cancelled, the second frame is an open-section roll-formed frame formed by roll-forming high-strength steel. Compared with the closed roll-formed profile with the same cross-section, the unfolded size is small, the difficulty of mold and tooling design is greatly reduced, and the number of roller designs is reduced by 20-30 pairs; the post-processed holes can avoid machine processing, reducing the process and development costs.

[0095] The utility model also provides a battery bracket assembly for installing a battery module, and any of the above-mentioned battery bracket assemblies or deformation structures can be selected.

[0096] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A corrosion-resistant battery bracket frame assembly, comprising a plurality of frames, wherein the plurality of frames are used to construct the battery bracket frame assembly, characterized in that: The battery support frame assembly comprises at least one first frame (100) and a second frame (200), the second frame (200) being roll-formed into an open cross-section roll-formed frame by a plurality of roll-formed sections, and the second frame (200) being assembled and welded to the bottom side wall of the first frame (100) along the length direction thereof; The welding area where the second frame (200) is connected to the first frame (100) forms a welding portion, and the welding portion is arranged in a continuous or segmented manner. The second frame (200) is assembled and welded to the bottom side wall of the first frame (100) through a plurality of welding portions.

2. The corrosion-resistant battery bracket frame assembly according to claim 1, characterized in that: The battery support frame assembly is a middle frame, the middle frame comprising a first frame (100) and a second frame (200) welded to two sides of the bottom thereof, the second frame (200) being provided with a first rolled section (220) and a fifth rolled section (220') respectively welded to two side walls of the bottom of the first frame, the first rolled section (220) and a connection area with a side wall of the first frame forming a first welding portion (250), and the fifth rolled section (220') and a connection area with the other side wall of the first frame forming a second welding portion (250').

3. The corrosion-resistant battery bracket frame assembly according to claim 2, characterized in that: The first rolling section (220) extends upwards towards one end of the first frame (100) to form a first flange (230), and the first flange (230) is welded to the side wall of the first frame (100) to form a first welding portion (250); the fifth rolling section (220') extends upwards towards the other end of the first frame (100) to form a second flange (230'), and the second flange (230') is welded to the side wall on the other side of the first frame to form a second welding portion (250').

4. The corrosion-resistant battery bracket frame assembly according to claim 3 is characterized in that: The first welding portion (250) and the second welding portion (250') are respectively divided into a plurality of independent welding segments by the first notch (270) and the second notch (270'), and each welding segment can be assembled and welded to be fixed on the side wall of the first frame (100).

5. The corrosion-resistant battery bracket frame assembly according to claim 3, characterized in that: The second frame (200) is provided with a third rolled section A (240) assembled and welded to the bottom end of the first frame, the first frame (100) is vertically overlapped on the third rolled section A (240) and divides it into two equal sections, and a welding area where the bottom end of the first frame (100) and the third rolled section A (240) intersect forms a plurality of discontinuously distributed third welding portions A (260).

6. The corrosion-resistant battery bracket frame assembly according to claim 2, characterized in that: The second frame (200) is provided with two third rolled sections B (240') respectively assembled and welded with the two sides of the lower part of the first frame (100); the two third rolled sections B (240') are symmetrically distributed on the two sides of the first frame (100); and the welding area where the two third rolled sections B (240') intersect with the side walls on both sides forms two independent third welding parts B (260').

7. The corrosion-resistant battery bracket frame assembly according to claim 1, characterized in that: The battery support frame assembly is an outer frame, the outer frame comprising a first frame (100) and a second frame (200) welded to one side of the bottom thereof, the second frame (200) being provided with a first rolled section (220) and a third rolled section A (240) respectively welded to the side wall of the first frame (100), and the connection area between the first rolled section (220), the third rolled section A (240) and the side wall of the first frame (100) forming a first welding portion (250) and a third welding portion A (260).

8. A battery bracket assembly, used for installing a battery module, characterized in that: The battery holder assembly comprises the battery holder frame assembly according to any one of claims 1-7.

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