Power battery system for pure electric loader

Abstract

The utility model relates to the field of engineering machinery, and discloses a power battery system for a pure electric loader, which comprises a welding frame, a battery fixing frame and a plurality of standard battery packs, the battery fixing frame is fixed on the welding frame; the battery fixing frame comprises a frame skeleton and a mounting surface, and the mounting surface is fixedly connected with the welding frame; the standard battery pack is divided into an upper standard battery pack and a lower standard battery pack according to the upper part and the lower part of the mounting surface and is assembled in a framework of the battery fixing framework; wherein the upper standard battery pack above the mounting surface is assembled at the upper part of the welding frame; and the lower standard battery pack below the mounting surface is assembled in the welding frame through a push-mounting method. The power battery system provided by the utility model can be designed in a platform manner, and simultaneously solves the problems that different types of loaders and different electric quantities need to customize battery packs, battery wire harnesses and pipelines are not restrained and fixed, a whole vehicle final assembly line produces a plurality of assembly parts and is slow in takt, the battery wrapping property and the integration property are relatively poor, and the like.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, and in particular to a power battery system for a pure electric loader. Background Art

[0002] A loader is a type of earthmoving machinery that is mainly used for shoveling bulk materials such as soil, sand, lime, and coal. It can also perform light shoveling operations on ore, hard soil, etc. As environmental protection requirements become increasingly stringent, the country has begun to strengthen emission requirements for construction machinery and strengthen the application of National VI construction machinery, but traditional construction machinery still emits engine exhaust. New energy construction machinery not only has no pollutant emissions, but also can reduce usage and maintenance costs. Among them, pure electric loaders use power batteries instead of traditional engines as a power source, and convert electricity into mechanical energy through motors to drive various systems. Pure electric loaders have no exhaust emissions, no pollution, and low noise during operation; secondly, pure electric construction machinery has a high power utilization rate and a more optimized structure than traditional loaders.

[0003] Since the power battery is the sole power source for pure electric loaders, its capacity directly determines the operating life. The industry's 5-7 ton pure electric loaders generally use a 282kwh-433kWh battery pack solution, which is 8-12 battery packs. However, due to incomplete technical considerations, this solution has the following drawbacks:

[0004] First of all, the battery systems with different capacities that match loaders of different tonnages are all separate battery solutions, and platform design cannot be achieved. That is, the battery layout and framework solution need to be customized. The same battery system cannot extend multiple capacities to adapt to pure electric loaders of different tonnages, and the battery system integration is not high.

[0005] Secondly, most batteries in the industry currently use standard PACKs and are distributed in the existing space of the loader. However, this leads to design problems such as relatively messy wiring harnesses between batteries and large differences in wiring harness lengths between branches, and the vehicle assembly line has many accessories and a slow cycle.

[0006] In addition, the battery packaging is not strong and is not widely applicable to the vehicle's operating environment. It will affect the battery life in mining or dusty environments. Utility Model Content

[0007] In response to the shortcomings of the existing technology, the purpose of the present utility model is to provide a power battery system for a pure electric loader, which solves the problems of customized battery packs for different loader models and different power levels, unconstrained and fixed battery wiring harnesses and pipelines, large number of assembly parts produced at a slow pace on the vehicle assembly line, and poor battery packaging and integration.

[0008] The solution adopted by the present invention is: a power battery system for a pure electric loader, comprising a welded frame, a battery fixing frame, and a plurality of standard battery packs; the battery fixing frame is fixed to the welded frame; the battery fixing frame comprises a frame skeleton and a mounting surface, the mounting surface being fixedly connected to the welded frame; the standard battery packs are divided into upper standard battery packs and lower standard battery packs according to the upper and lower mounting surfaces, and both are assembled in the frame skeleton of the battery fixing frame;

[0009] Among them, the upper standard battery pack above the installation surface is assembled on the upper part of the welded frame; the lower standard battery pack below the installation surface is assembled by a push-on method and assembled inside the welded frame.

[0010] Furthermore, the battery fixing frame also includes a crossbeam, which is fixed in the middle of adjacent vertical parts of the frame skeleton.

[0011] Furthermore, the battery fixing frame also includes a fixing plate and a lower base plate; the fixing plate is bent downward on both sides and fixedly connected to the frame frame, and is used for supporting and layering the upper standard battery pack, and at least one upper standard battery pack is assembled on each fixing plate; the lower base plate is used for supporting and layering the lower standard battery pack, and at least one lower standard battery pack is assembled on each lower base plate.

[0012] Furthermore, the battery fixing frame also includes a lower cover plate, multiple cover plates and multiple side cover plates. The lower cover plate is fixed between the lower base plate and the mounting surface, the multiple cover plates are respectively fixed between the frame frame of the battery fixing frame and the two cross beams, and the multiple side cover plates are respectively fixed on the frame frame on the side of the battery fixing frame.

[0013] Furthermore, the lower cover plate and each cover plate are provided with maintenance holes corresponding to the number of standard battery packs inside, and are sealed by an oblong cover plate and bolts.

[0014] Furthermore, the mounting surface and the welded frame, the frame skeleton and the cross beam, the fixing plate and the cross beam, the cover plate and the frame skeleton and the cross beam, the side cover plate and the cross beam, and the lower cover plate, the lower bottom plate and the mounting surface are all fixedly connected by bolts.

[0015] Furthermore, the power battery system also includes a high-voltage box and several high and low voltage wiring harnesses; the high-voltage box is fixed to the upper end of the battery fixing frame; the high and low voltage wiring harnesses are respectively connected to the high-voltage box, and the high and low voltage wiring harnesses are assembled.

[0016] Furthermore, the power battery system also includes a thermal management system cooling pipeline, and the thermal management system cooling pipeline is assembled on the battery fixing frame.

[0017] Furthermore, one side of the battery fixing frame on the welded frame is close to the driving position and the other side is close to the counterweight position, and the standard battery pack is arranged between the driving position and the counterweight position.

[0018] Furthermore, a plurality of lifting lugs are installed around the upper end of the battery fixing frame, and the power battery system is installed on the welded frame through the lifting lugs.

[0019] The beneficial effects of the above utility model are as follows:

[0020] The power battery system for pure electric loaders provided by the utility model can be designed as a platform. From the bottom up, a certain number of standard battery packs can be eliminated, and battery systems such as 289kWh, 357kWh, and 433kWh can be extended. This solves the problem that different types of loaders and different power levels require separately customized battery assembly solutions, enriches the product line and shortens the development and verification cycle.

[0021] The power battery system for pure electric loaders provided by the utility model solves the problem of unconstrained and unfixed battery wiring harnesses and cooling pipes in the industry, and has a high consistency between battery pack branches. Compared with the previous generation of battery systems, it improves the production rhythm of the vehicle assembly line and the overall assembly speed of the battery system. The sub-assembly and integration facilitates the specialization of assembly employees and improves assembly reliability.

[0022] The power battery system for a pure electric loader provided by the utility model has well-wrapped batteries, which is applicable to a wider range of vehicle use environments, solves the problem of battery use being affected by mining or heavy dust, and extends the battery life.

[0023] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is an external view of a power battery system in an embodiment of the present utility model;

[0026] Figure 2 This is an internal view of a power battery system in an embodiment of the present utility model;

[0027] Figure 3 Schematic diagram of the assembly method of the battery fixing frame and the standard battery pack in the embodiment of the present utility model;

[0028] Figure 4This is a schematic diagram of the internal structure of the battery fixing frame in an embodiment of the present utility model;

[0029] Figure 5 It is a standard battery pack structure diagram in an embodiment of the present utility model.

[0030] Among them, 1-welded frame, 1.1-frame sealing plate, 1.2-fixed bracket, 2-battery fixing frame, 2.1-frame skeleton, 2.2-crossbeam, 2.3-lower cover plate, 2.4-fixed plate, 2.5-cover plate, 2.6-side cover plate, 2.7, 2.8-cover plate, 2.9-long oval cover plate, 2.10-lifting ear, 2.11-mounting surface, 2.12-lower base plate, 3-standard battery pack, 3.1-upper standard battery pack, 3.2-lower standard battery pack, 4-high-voltage box. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0033] Example 1

[0034] like Figure 1-Figure 3 As shown, a power battery system for a pure electric loader includes a welded frame 1, a battery fixing frame 2 and multiple standard battery packs 3; the battery fixing frame 2 is fixed on the welded frame 1; the battery fixing frame 2 includes a frame skeleton 2.1 and a mounting surface 2.11, and the mounting surface 2.11 is fixedly connected to the welded frame 1; the standard battery pack 3 is divided into an upper standard battery pack 3.1 and a lower standard battery pack 3.2 according to the upper and lower positions of the mounting surface 2.11, and both are assembled in the frame skeleton 2.1 of the battery fixing frame 2.

[0035] Among them, Figure 2 As shown, the upper standard battery pack 3.1 above the mounting surface 2.11 is assembled on the upper part of the welded frame 1; the lower standard battery pack 3.2 below the mounting surface 2.11 is assembled by a push-fit method and assembled inside the welded frame 1.

[0036] like Figure 3As shown, in this embodiment, the battery mounting frame 2 also includes a crossbeam 2.2, which is fixed between adjacent vertical sections of the frame skeleton 2.1. The battery mounting frame 2 also includes a fixing plate 2.4 and a lower base plate 2.12. The fixing plate 2.4 has downwardly curved sides and is fixedly connected to the frame skeleton 2.1, used to support and layer the upper standard battery packs 3.1. Each fixing plate 2.4 is mounted on at least one upper standard battery pack 3.1. The lower base plate 2.12 is used to support and layer the lower standard battery packs 3.2. Each lower base plate 2.12 is mounted on at least one lower standard battery pack 3.2.

[0037] like Figure 1 As shown, the battery mounting frame 2 also includes a lower cover plate 2.3, multiple cover plates 2.5, 2.7, 2.8, and multiple side cover plates 2.6. The lower cover plate 2.3 is fixed between the lower base plate 2.12 and the mounting surface 2.11. The multiple cover plates 2.5, 2.7, and 2.8 are respectively fixed between the frame frame 2.1 of the battery mounting frame 2 and the two crossbeams 2.2. The multiple side cover plates 2.6 are respectively fixed to the frame frame 2.1 on the sides of the battery mounting frame 2. The lower cover plate 2.3 and each of the cover plates 2.5, 2.7, and 2.8 are provided with maintenance holes corresponding to the number of standard battery packs 3 inside, and are sealed by an oblong cover plate 2.9 and bolts.

[0038] The power battery system behind the sealing cover has good battery wrapping, and the battery system frame strictly protects the battery assembly, wiring harness connection, pipelines, high-voltage box, etc. It has good protection when used in harsh environments such as mines and sand and gravel plants with high dust, extending the service life of the battery in this environment, and is applicable to a wide range of vehicle usage environments.

[0039] The mounting surface 2.11 and the welded frame 1, the frame skeleton 2.1 and the cross beam 2.2, the fixing plate 2.4 and the cross beam 2.2, the cover plates 2.5, 2.7, 2.8 and the frame skeleton 2.1 and the cross beam 2.2, the side cover plate 2.6 and the cross beam 2.2, and the lower cover plate 2.3, the lower base plate 2.12 and the mounting surface 2.11 are all fixedly connected by bolts, which are convenient for later maintenance and easy to disassemble.

[0040] like Figure 4 As shown, the specific layer of frame is (taking the top of the welded frame as an example), the upper standard battery pack 3.1 is fixed on the fixed plate 2.4, and the two sides of the fixed plate 2.4 are fixed to the frame skeleton 2.1 by bolts, and then the crossbeam 2.2 is connected to the frame skeleton 2.1 and the fixed plate 2.4 by bolts respectively, and the cover plate 2.5 is fixed to the frame skeleton 2.1 and the crossbeam 2.4 by bolts, and the side cover plate 2.6 is fixed to the frame skeleton 2.1. At this time, one layer of frame is completed, and the other layers are assembled in the same way.

[0041] like Figure 3As shown, in this embodiment, the power battery system also includes a high-voltage box 4 and several high- and low-voltage wiring harnesses. The high-voltage box 4 is fixed to the upper end of the battery mounting frame 2. The high- and low-voltage wiring harnesses are respectively connected to the high-voltage box 4, and the high and low-voltage wiring harnesses are assembled. The power battery system also includes thermal management system cooling pipes, which are both assembled on the battery mounting frame 2. The high- and low-voltage wiring harnesses and thermal management system cooling pipes are not shown in the figure.

[0042] After the battery system is assembled and integrated, it is put on the final assembly line, which greatly improves the cycle speed of the vehicle production line.

[0043] In this embodiment, the power battery system consists of 12 standard battery packs 3, a battery mounting frame 2, a high-voltage box 4, and several high- and low-voltage wiring harnesses and cooling lines. The 12 battery packs shown in this power battery system correspond to a 433kWh battery system, which can support 6-7 ton pure electric loaders for various application scenarios. This power battery system can be used in 5- and 6-ton pure electric loaders by reducing the number of upper standard battery packs 3.1 or lower standard battery packs 3.2 to form a 10-pack battery system corresponding to a 357kWh battery system, or an 8-pack battery system corresponding to a 289kWh battery system. By eliminating two or four battery packs from the standard battery pack 3 from the bottom up, this improves vehicle commonality, further enriches the product line, and reduces the development and verification cycle.

[0044] In addition, the boundaries of the power battery system can be extended to achieve CTP integrated design, which can optimize the design cost.

[0045] In this embodiment, the power battery system is assembled on the production line assembly line.

[0046] The battery mounting frame 2 on the welded frame 1 is positioned near the driver's cab on one side and the counterweight on the other. The battery pack is positioned between the cab and the counterweight. The battery pack can also be integrated into the counterweight at the rear end of the loader.

[0047] In this embodiment, a plurality of lifting lugs 2.10 are installed around the upper end of the battery fixing frame 2, and the power battery system is installed on the welded frame 1 through the lifting lugs 2.10.

[0048] In this embodiment, the application process of the power battery system is as follows:

[0049] First, assemble the bottom upper standard battery pack 3.1 onto the frame skeleton 2.1 in the battery fixing frame 2, then assemble the battery fixing plate 2.4. Then, assemble two upper standard battery packs 3.1 onto the fixing plate 2.4. Continue assembling the upper standard battery pack 3.1 above the mounting surface 2.11 in this manner. The lower standard battery pack 3.2 below the mounting surface 2.11 is assembled using a push-on method, making it easy to place and remove according to different loaders. Twelve battery packs correspond to a 433kWh battery system, which can support 6-7 ton pure electric loaders for various application scenarios. This power battery system can be used to reduce the number of upper standard battery packs 3.1 or lower standard battery packs 3.2, eliminating two or four battery packs from the bottom of the standard battery pack 3, forming a 10-pack battery system corresponding to a 357kWh battery system, or an 8-pack battery system corresponding to a 289kWh battery system. These can be used on 6-ton and 5-ton pure electric loaders to address various application scenarios.

[0050] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A power battery system for a pure electric loader, characterized in that: The vehicle comprises a welded frame, a battery fixing frame, and a plurality of standard battery packs; the battery fixing frame is fixed to the welded frame; the battery fixing frame comprises a frame skeleton and a mounting surface, the mounting surface being fixedly connected to the welded frame; the standard battery packs are divided into upper standard battery packs and lower standard battery packs according to the upper and lower mounting surfaces, and are both assembled in the frame skeleton of the battery fixing frame; Among them, the upper standard battery pack above the mounting surface is assembled on the upper part of the welded frame; the lower standard battery pack below the mounting surface is assembled by push-fitting method and assembled inside the welded frame; The battery fixing frame further includes a lower cover plate, multiple cover plates, and multiple side cover plates. The lower cover plate is fixed between the lower base plate and the mounting surface. The multiple cover plates are respectively fixed between the frame skeleton of the battery fixing frame and the two cross beams. The multiple side cover plates are respectively fixed to the frame skeleton on the side of the battery fixing frame. The lower cover plate and each cover plate are provided with maintenance holes corresponding to the number of standard battery packs inside, and are sealed by oblong cover plates and bolts. The power battery system also includes a high-voltage box and a plurality of high- and low-voltage wiring harnesses; the high-voltage box is fixed to the upper end of the battery fixing frame; the high- and low-voltage wiring harnesses are respectively connected to the high-voltage box, and the high- and low-voltage wiring harnesses are assembled; The power battery system further includes a thermal management system cooling pipeline, and the thermal management system cooling pipelines are all assembled on the battery fixing frame.

2. A power battery system for a pure electric loader according to claim 1, characterized in that: The battery fixing frame further comprises a crossbeam fixed in the middle of adjacent vertical parts of the frame skeleton.

3. A power battery system for a pure electric loader according to claim 2, characterized in that: The battery fixing frame also includes a fixing plate and a lower base plate; the fixing plate is bent downward on both sides and fixedly connected to the frame frame, and is used for supporting and layering the upper standard battery pack. At least one upper standard battery pack is assembled on each fixing plate; the lower base plate is used for supporting and layering the lower standard battery pack. At least one lower standard battery pack is assembled on each lower base plate.

4. A power battery system for a pure electric loader according to claim 1, characterized in that: The mounting surface and the welded frame, the frame skeleton and the cross beam, the fixing plate and the cross beam, the cover plate and the frame skeleton and the cross beam, the side cover plate and the cross beam, and the lower cover plate and the lower bottom plate and the mounting surface are all fixedly connected by bolts.

5. A power battery system for a pure electric loader according to claim 1, characterized in that: One side of the battery fixing frame on the welded frame is close to the driving position, and the other side is close to the counterweight position, and the standard battery pack is arranged between the driving position and the counterweight position.

6. A power battery system for a pure electric loader according to claim 1, characterized in that: A plurality of lifting lugs are installed around the upper end of the battery fixing frame, and the power battery system is installed on the welded frame through the lifting lugs.

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