Power battery mounting structure and new energy commercial vehicle

Abstract

The invention discloses a power battery mounting structure in the field of power battery systems. The power battery mounting structure comprises a frame assembly and a plurality of frame assemblies, the frame assemblies are fixed to the two sides of the frame assembly, a frame supporting component assembly is arranged between every two adjacent frame assemblies, every two opposite frame assemblies are connected through a supporting component, and the frame supporting component assemblies reduce stress loads borne by the frame assembly. A mounting area for fixing a power battery is arranged in each frame assembly, and the mounting area can be changed according to the volume of the power battery for multi-stage adjustment; a traditional battery installation mode is changed into a chassis side arrangement mode, it is guaranteed that the gravity center of the whole vehicle body does not shift, the gravity center lowering effect is achieved, the space on the two sides of the vehicle frame assembly is utilized, the size occupied by battery installation is reduced, and matching of different electric quantity requirements of the whole vehicle is achieved; the structural design of reducing cost and weight is carried out on the premise of meeting the strength requirements of typical extreme working conditions.

Description

Technical Field

[0001] The present application relates to the technical field of power battery systems, and in particular to a power battery mounting structure and a new energy commercial vehicle. Background Art

[0002] In the field of new energy pure electric commercial vehicles, the current layout forms of power batteries include back, side and back + side. Although the back type can stack power battery packs in multiple layers to achieve large power and long battery life, the back battery assembly occupies a large upper installation space on special models, the battery installation adaptability is not strong, the total weight of the battery exceeds the front axle load, and the center of gravity of the vehicle is high. These disadvantages are magnified. Combined with the operating scenarios and working conditions of commercial vehicles, for some models, the power battery layout tends to be more inclined to the side of the chassis.

[0003] With the continuous development of power batteries, their energy density continues to increase, and the power capacity of the power battery loaded on the whole vehicle can also become larger and larger. The strength requirements of the battery installation structure itself and the strength requirements of the battery installation structure under various extreme working conditions of the whole vehicle are constantly increasing. How to solve the disadvantages brought by the rear-mounted layout is what we need to solve. Summary of the invention

[0004] The purpose of the present application is to provide a power battery installation structure and a new energy commercial vehicle to solve the defects of the prior art such as the large installation space occupied by the back-type battery arrangement, the insufficient strength of the battery installation structure, and the inability to adapt to the installation of battery packs of different specifications.

[0005] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: In the first aspect, the present application discloses a power battery installation structure, characterized in that it includes a frame assembly and multiple frame assemblies; the multiple frame assemblies are fixed on both sides of the frame assembly, a frame support component assembly is provided between two adjacent frame assemblies in the Y-axis direction, the two frame assemblies in the Y-axis direction are connected by a support component, the frame support component assembly is used to reduce the stress load on the frame assembly, and each frame assembly is provided with an installation area for fixing the power battery, and the installation area can be adjusted in multiple stages according to the volume of the power battery.

[0006] According to a further solution of the present application, the frame assembly is a hollow structure, and a plurality of mounting plates are installed in the frame assembly, a plurality of fixing holes are formed on the mounting plates, and the power battery is placed in the frame assembly and fixed in place by means of fixing members cooperating with the corresponding fixing holes.

[0007] A further solution of the present application is that the frame support component assembly includes an intermediate cross beam and a supporting vertical beam, and fixed plates are provided at both ends of the intermediate cross beam, and the fixing plates are fixedly connected to adjacent columns. The two columns are correspondingly fixed to the adjacent frame assemblies in the Y-axis direction, and each of the frame assemblies is a multi-layer structure. The supporting vertical beam is fixed on a side of the frame assembly away from the vehicle frame assembly.

[0008] According to a further solution of the present application, the power battery mounting structure further includes a skin assembly, wherein the skin assembly includes a plurality of skins, and the plurality of skins are correspondingly fixed on panels in various directions of the frame assembly.

[0009] In a further solution, a plurality of protrusions are provided on the upper skin surface at the top of the skin assembly.

[0010] According to a further solution of the present application, the power battery mounting structure also includes electrical system components, braking system components, pipeline system components and electronic control system components, and the electrical system components, braking system components and electronic control system components are fixed to the frame assembly through dedicated brackets, and the pipeline system components are welded to the frame assembly.

[0011] In a second aspect, the present application discloses a chassis assembly, which includes the above-mentioned power battery mounting structure.

[0012] In a third aspect, the present application discloses a new energy commercial vehicle, which includes the above-mentioned chassis assembly.

[0013] The beneficial effects of this application are: In this application, the traditional battery installation structure is changed to a chassis side installation method. The bottom frame assembly is symmetrically installed during production to ensure that the center of gravity of the entire vehicle body is not offset and has the effect of lowering the center of gravity. The space on both sides of the frame assembly is used to reduce the volume occupied by the battery installation. Frame support components are fixed between adjacent frame assemblies, which not only improves the strength of the frame assembly, but also reduces the stress load on the frame assembly. The adjustable installation area in the frame assembly can achieve matching of different power requirements of the whole vehicle, and the structural design of cost reduction and weight reduction is carried out under the premise of meeting the strength requirements of typical extreme working conditions.

[0014] In addition, the integrated design of the frame assembly with multiple system components such as electrical, cooling, braking, and body reduces layout space, shortens wheelbase, and achieves cost and weight reduction and energy-saving effects for the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a frame assembly in a power battery installation structure according to an embodiment of the present application; Figure 2 This is a structural schematic diagram of a frame assembly and a vehicle frame assembly in a power battery installation structure according to a first embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the frame support component in the power battery installation structure of the first embodiment of the present application; Figure 4 This is a structural schematic diagram of a power battery installation structure according to an embodiment of the present application; Figure 5 This is a schematic diagram of the integrated structure of the power battery installation structure of the first embodiment of the present application; in: 10. Vehicle frame assembly; 11. Left battery frame assembly; 12. Right battery frame assembly; 13. Power battery; 21. Middle cross beam; 22. Supporting vertical beam; 23. Fixed plate; 24. Column; 30. Skin assembly; 31. Upper skin; 32. Small door assembly; 41. Left front fender; 42. Right front fender; 43. Main power switch; 44. Chassis power distribution box; 45. Air compressor module; 46. Air tank; 47. Charging socket; 48. BMS controller; 49. EVCC controller; 50. Pedal. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Embodiment 1

[0017] like Figure 1 and Figure 2 As shown, a power battery installation structure is provided in the present embodiment, which includes a frame assembly 10; a plurality of frame assemblies, two of which are designed in the present embodiment, each of which has an upper and lower layer in the Z-axis direction, and the plurality of frame assemblies are evenly fixed on both sides of the frame assembly 10, and a frame support component assembly is provided between two relatively adjacent (i.e., in the same Y-axis direction) frame assemblies, and the frame support component assembly connects the two relatively frame assemblies together to form an integral whole, and finally the frame assembly is fixed to the frame assembly 10, and the irregular stress load on the frame assembly 10 is small or the regular stress load is reduced; an installation area for fixing the power battery 13 is provided in each frame assembly, and in the present embodiment, the installation area is divided into an upper and lower layer, and has a plurality of groups of space components, and the size of the installation area can be changed according to the volume and installation amount of the power battery 13 to achieve multi-level adjustment.

[0018] When in use, the appropriate number of power batteries 13 will be selected according to the power of the vehicle's motor and placed in the installation area of ​​the frame assembly. The two frame assemblies are connected using a frame support component assembly, wherein the number of frame support components is determined based on the actual length of the frame assembly. The frame assembly is fixed on both sides of the frame assembly 10. The center of the entire structure can be lowered, and the areas on both sides of the frame assembly 10 are utilized to reduce the space occupied by the installation.

[0019] As attached Figure 1 As shown, the two frame assemblies in this embodiment are a left battery frame assembly 11 and a right battery frame assembly 12. The power battery 13 is horizontally loaded into the frame from the outside and fixed with bottom bolts. A plurality of rows of threaded holes are arranged on the mounting plate in the frame assembly to cooperate with the ear holes on the power battery 13 for fixing.

[0020] In some other embodiments, the mounting plate can slide along the X-axis direction within the corresponding frame assembly, a slide rail is installed on the frame assembly skeleton, and a plurality of locking screws are installed along the Y-axis direction on the skeleton corresponding to the slide rail. The mounting plate moves according to the number of power batteries 13 installed to ensure that the center of the overall structure of the power battery 13 is in the center of the vehicle body as much as possible, thereby ultimately improving the safety performance of the vehicle.

[0021] As attached Figure 2 As shown, in this embodiment, the left battery frame assembly 11 and the right battery frame assembly 12 are first assembled with power batteries 13, and then assembled to the frame assembly 10 in sequence, and connected by bolts. The bottom of the left battery frame assembly 11 and the right battery frame assembly 12 are connected by the middle crossbeam 21, which plays a supporting role for the left battery frame assembly 11 and the right battery frame assembly 12, and reduces and avoids the torsional deformation of the frame assembly 10 caused by the gravity of the frame and the power battery itself or the torsional working condition.

[0022] As attached Figure 3 As shown, in this embodiment, the frame support component assembly can strengthen the structural strength of the left and right frame assemblies, which includes frame columns 24 and the middle cross beam 21. Several columns 24 on the left battery frame assembly 11 and the right battery frame assembly 12 are bolted to the middle cross beam 21. The fixing plate 23 at the connection part of the middle cross beam 21 is subjected to greater stress, and its own strength requirements are met by optimizing its material, plate thickness, stress-bearing area and other factors.

[0023] The frame support component assembly in this embodiment also includes support vertical beams 22. Several support vertical beams 22 are added to the outer sides of each layer of the left battery frame assembly 11 and the right battery frame assembly 12 to increase the strength of the frame assembly. The left battery frame assembly 11 and the right battery frame assembly 12 are connected to the frame assembly 10 through the columns 24. In actual production, the thickness of the high-strength steel column 24 plate is increased, and the outer dimensions and number of bolts of the fixing plate 23 at the connection part between the column 24 and the middle cross beam 21 are increased, so as to further reduce the stress of the column 24, the middle cross beam 21 and the fixing plate 23 of the left battery frame assembly 11 and the right battery frame assembly 12, thereby meeting the structural strength requirements of the whole vehicle.

[0024] As attached Figure 4 As shown, in this embodiment, a skin assembly 30 is also added, which includes six skins, mainly for sealing the six surfaces of the left battery frame assembly 11 and the right battery frame assembly 12, including front, back, left, right, top and bottom, and is screwed to the battery frame using sheet metal thin plates. The functions of the seal are: isolation from the outdoor temperature is beneficial to the heat preservation of the battery, it is beneficial to the corrosion of various media such as rainwater and seawater on the power battery, internal electrical components and pipelines, and it can avoid the direct impact of foreign objects on the internal components of the frame. Among them, the upper skin 31 of the upper layer adopts a stamping process to increase convex points, which plays an anti-skid role when getting on the vehicle. The front part of the right battery frame assembly 12 is a small door assembly 32, which is a charging socket 47 when opened. This scheme is an integrated design of the charging box and the power battery installation structure.

[0025] As attached Figure 5 As shown, this embodiment integrates the chassis components, the left / right front fenders and the left / right battery frame assemblies, eliminates the front fender bracket, optimizes the layout space, and reduces costs and weight. This involves electrical system components, brake system components, pipeline system components, and electronic control system components.

[0026] The electrical system components include a chassis distribution box 44 and a main power switch 43 arranged on the left battery frame assembly 11, and are connected by exclusive brackets for each component to optimize the layout space.

[0027] The brake system components include an air compressor module 45 and an air reservoir 46 arranged on the left / right battery frame assembly, and are connected by dedicated brackets for each component to optimize the layout space.

[0028] Pipeline system components, pipes and wiring harnesses, and fixed brackets for both are directly welded to the left / right battery frame assembly. The charging socket 47 is arranged on the right battery frame assembly 12, eliminating the separate charging box, optimizing the layout space, and achieving cost and weight reduction.

[0029] The electronic control system components include a BMS controller 48 and an EVCC controller 49 which are arranged on the right battery frame assembly 12 and connected by dedicated brackets for each component to optimize the layout space.

[0030] In addition, a pedal 5 is arranged, and the pedal 50 is directly screwed on the left / right battery frame assembly to support personnel working on the vehicle. Embodiment 2

[0031] This embodiment discloses a chassis assembly, which includes the power battery mounting structure in the above-mentioned embodiment 1. Embodiment 3

[0032] This embodiment discloses a new energy commercial vehicle, which includes the chassis assembly in the above-mentioned embodiment 2.

[0033] Specific use; First, the power batteries 13 are separately installed in the left battery frame assembly 11 and the right battery frame assembly 12. After the power batteries 13 are installed, the ear holes on the battery pack are fixed by bolts, and the supporting vertical beams 22 are fixed to the side of each frame assembly away from the frame assembly 10 to strengthen the structural strength of the frame assembly. The fixing plates 21 at both ends of the middle cross beam 21 are connected to the corresponding left battery frame assembly 11 and right battery frame assembly 12 upper columns 24 with bolts. Since the installation position of the power battery 13 is fixed at the bottom of the frame, the center of gravity of the entire vehicle body is relatively low, and the installation of electrical system components, brake system components, pipeline system components and electronic control system components is in accordance with the attached Figure 5 The installation is carried out in the same manner as described in the first embodiment to form an integration.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

Claims

1. A power battery installation structure, characterized in that: The invention comprises a vehicle frame assembly (10) and a plurality of frame assemblies; the plurality of frame assemblies are fixed on both sides of the vehicle frame assembly (10); a frame support component assembly is provided between two adjacent frame assemblies in the Y-axis direction; the two frame assemblies in the Y-axis direction are connected via a support component; the frame support component assembly is used to reduce the stress load on the vehicle frame assembly (10); each frame assembly is provided with an installation area for fixing a power battery (13); the installation area can be adjusted in multiple stages according to the volume of the power battery (13).

2. The power battery installation structure according to claim 1, characterized in that: The frame assembly is a hollow structure, and a plurality of mounting plates are installed in the frame assembly. The mounting plates are provided with a plurality of fixing holes. The power battery (13) is placed in the frame assembly and is installed and fixed by means of fixing parts that cooperate with the corresponding fixing holes.

3. The power battery installation structure according to claim 1, characterized in that: The frame support component assembly comprises an intermediate cross beam (21) and a support vertical beam (22), and fixing plates (23) are provided at both ends of the intermediate cross beam (21), and the fixing plates (23) are fixedly connected to adjacent columns (24) in the Y-axis direction, and two of the columns (24) are correspondingly fixed on adjacent frame assemblies in the Y-axis direction, and each of the frame assemblies is a multi-layer structure, and the support vertical beam (22) is fixed on a side of the frame assembly away from the vehicle frame assembly (10).

4. The power battery installation structure according to claim 1, characterized in that: The power battery installation structure also includes a skin assembly (30), wherein the skin assembly (30) includes a plurality of skins, and the plurality of skins are correspondingly fixed on each side surface of the frame assembly.

5. The power battery installation structure according to claim 4, characterized in that: A plurality of convex points are arranged on the surface of the upper skin (31) at the top of the skin assembly (30).

6. The power battery installation structure according to claim 1, characterized in that: The power battery installation structure also includes electrical system components, brake system components, pipeline system components and electronic control system components. The electrical system components, brake system components and electronic control system components are fixed to the frame assembly through dedicated brackets, and the pipeline system components are welded to the frame assembly.

7. A chassis assembly, characterized in that: Comprising the power battery mounting structure according to any one of claims 1 to 6.

8. A new energy commercial vehicle, characterized in that: Includes the chassis assembly described in claim 7.

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