Large module assembly and electric automobile

Abstract

The utility model discloses a large module assembly and an electric automobile, and relates to the technical field of battery production, the large module assembly comprises a plurality of small modules, and each small module is locked and fixed through a pair of module end plates and a pair of module side plates; the small modules are sequentially laid and stacked, the module side plates of every two adjacent small modules are attached to each other, and the module end plates of every two adjacent small modules are locked and fixedly connected through the module connecting plates. According to the utility model, only the structure of the module end plate in the module is improved, and the improved module end plate is used for locking the plurality of small modules which are flatly paved and stacked, so that a large module assembly is formed, the battery cell grouping rate can be improved, and meanwhile, the original part structure and the original tool clamp and equipment structure of a production line are compatible as far as possible; and a large module assembly structure is realized at the minimum transformation and development cost, the battery cell grouping rate is improved, and the energy density of a battery system assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a large module assembly and an electric vehicle. Background Art

[0002] The statements herein only provide background art related to the utility model and do not necessarily constitute prior art.

[0003] With the development of the new energy vehicle industry, the demand for the pure electric driving range of vehicles is increasing day by day, and thus the requirements for high integration and high energy density of battery systems are also getting higher and higher. The structure of the large module assembly of the battery system is beneficial to improving the grouping rate of battery cells and the energy density of the battery system assembly, thereby ultimately improving the pure electric driving range of new energy vehicles. The existing large module assembly structure usually uses a pair of end plates and a pair of side plates to lock and fix multiple rows of battery cell stacking units, and an integrated bus bar and a wiring harness board assembly are arranged above. However, for this traditional module structure design, when facing the development and transformation such as the improvement of the battery cell grouping rate and the improvement of the assembly energy density, it is often necessary to re-develop the end plate, side plate, integrated bus bar and wiring harness board assembly, which has a large development cost, consumes time and effort, and the original production line tooling fixtures and equipment cannot be made universal either. Summary of the Utility Model

[0004] In view of the above problems and defects existing in the prior art, the utility model provides a large module assembly and an electric vehicle. Only the structure of the module end plate in the module is improved in this assembly structure, and the improved module end plate is used to lock multiple small modules stacked flat, so as to form a large module assembly. While meeting the requirement of improving the battery cell grouping rate, it can be compatible with the original component structure and the structure of the original production line tooling fixtures and equipment as much as possible, and realize the structure of the large module assembly with the smallest modification and development cost, improve the battery cell grouping rate, and further improve the energy density of the battery system assembly.

[0005] To achieve the above object, the utility model first provides a large module assembly.

[0006] A large module assembly includes a plurality of small modules, and each small module is locked and fixed by a pair of module end plates and a pair of module side plates;

[0007] The plurality of small modules are stacked flat in sequence, and the module side plates between two adjacent small modules are in zero contact, and the module end plates of two adjacent small modules are locked and fixedly connected through a module connecting plate.

[0008] In a further technical solution, the small module includes a plurality of serially connected battery cells, and the plurality of battery cells are tightly stacked in columns in the same direction to form a battery cell stacking unit.

[0009] Further technical solution: The battery cell stacking unit is locked and fixed by the surrounding module end plates and module side plates.

[0010] Further technical solution: A signal acquisition interface is provided on the module end plate of the small module. An integrated busbar and a wiring harness board assembly are provided at the electrodes of several battery cells in the small module. The electrodes of several battery cells are connected to the integrated busbar and the wiring harness board assembly in the small module, and the integrated busbar and the wiring harness board assembly lead out the signal acquisition interface.

[0011] Further technical solution: A heating film is provided at the bottom of the small module.

[0012] Further technical solution: A module protection upper cover is further provided on the top of the small module, and the module protection upper cover is fixedly covered above the electrodes of several battery cells.

[0013] Further technical solution: The module end plate includes a module end plate body, the module end plate body is hollow and internally provided with a plurality of reinforcing ribs.

[0014] Further technical solution: A plurality of rivet nuts are symmetrically provided on both sides of the module end plate body.

[0015] Further technical solution: The module connecting plate is an L-shaped plate, and a plurality of connection holes are provided on the module connecting plate. The positions of the plurality of connection holes correspond to the positions of the adjacent rivet nuts on the module end plate bodies of two adjacent small modules.

[0016] Further technical solution: A fastening bolt is used to pass through the connection hole and be fixed to the rivet nut, so that the module connecting plate is locked on the module end plates of two adjacent small modules.

[0017] The present utility model also provides an electric vehicle.

[0018] An electric vehicle, which includes the large module assembly as described above.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] The present utility model provides a large module assembly and an electric vehicle. By improving the structure of the module end plate in the module and adding a rivet nut structure in the module end plate, the improved module end plate is used to lock a plurality of small modules stacked flat, so as to form a large module assembly. By forming the large module assembly structure in this way, it can meet the requirement of improving the battery cell grouping rate, and at the same time, it can be as compatible as possible with the original component structure and the structure of the original tooling fixtures and equipment on the production line, and realize the large module assembly structure with the smallest modification and development cost, improve the battery cell grouping rate, and further improve the energy density of the battery system assembly. Description of the Drawings

[0021] The accompanying drawings of the specification, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0022] Figure 1 is a schematic structural diagram of the large module assembly described in the present utility model;

[0023] Figure 2 is an exploded schematic structural diagram of the small module in the large module assembly described in the present utility model;

[0024] Figure 3 is a schematic structural diagram of the module end plate in the large module assembly described in the present utility model;

[0025] Figure 4 is a schematic structural diagram of the module connection plate in the large module assembly described in the present utility model;

[0026] Figure 5 is a schematic diagram of the fastening connection between the module end plate and the module connection plate in the large module assembly described in the present utility model.

[0027] Among them, 1, small module; 2, module connection plate; 3, fastening bolt; 11, upper module protection cover; 12, integrated busbar and wiring harness board integrated component; 13, battery cell; 14, module end plate; 15, module side plate; 16, heating film; 17, signal acquisition interface; 141, module end plate body; 142, rivet nut. Detailed implementation manners

[0028] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations for the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0029] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Embodiment 1

[0031] The present utility model proposes a large module assembly, as Figure 1As shown in the figure, the large module assembly includes a plurality of small modules 1. The plurality of small modules 1 are laid and stacked in sequence, and the module side plates 15 between two adjacent small modules are in zero contact, and the module end plates 14 of two adjacent small modules are fixedly connected by a module connecting plate 2. Among them, each small module 1 is fixedly locked by a pair of module end plates 14 and a pair of module side plates 15. Further, as Figure 2 shown, the small module 1 includes a plurality of serially connected battery cells 13, and the plurality of battery cells 13 are closely stacked in columns in the same direction to form a battery cell stacking unit; the battery cell stacking unit is fixedly locked by the surrounding module end plates 14 and module side plates 15.

[0032] Specifically, in the present utility model, the large module assembly is composed of 3 small modules 1. The 3 small modules 1 are laid and stacked together in a manner that the module end plates 14 and the module side plates 15 are in zero contact (that is, in a 0-gap fitting manner, which can be realized by using the existing zero-fitting process), and then the module connecting plates 2 (that is, two pairs symmetrically front and back) are used to lock the adjacent module end plates, and the 3 small modules are locked to form a large module assembly.

[0033] Further, as Figure 3 shown, the above-mentioned module end plate 14 includes a module end plate body 141. The module end plate body 141 is hollow and is provided with a plurality of reinforcing ribs inside, which can reduce the weight of the module end plate while ensuring the strength of the module end plate and reduce its manufacturing cost; a plurality of heat dissipation holes of different sizes are also provided in the module end plate body 141 to facilitate the heat dissipation of the battery cells; moreover, a plurality of blind rivet nuts 142 are symmetrically provided on both sides of the module end plate body 141. By adding a blind rivet nut structure, a bolt fastening point is provided for the module connecting plate.

[0034] As Figure 4 shown, the module connecting plate 2 is an L-shaped plate, and a plurality of connection holes are provided on the module connecting plate 2. The positions of the plurality of connection holes correspond to the positions of the adjacent blind rivet nuts 142 on the module end plate body 141 of two adjacent small modules. As Figure 5 shown, a fastening bolt 3 is used to pass through the connection hole and be fixed to the blind rivet nut 142, so that the module connecting plate 2 is locked on the module end plates 14 of two adjacent small modules.

[0035] By locking the module connecting plate on the module end plates of adjacent small modules as described above, it is realized to achieve a 0-gap arrangement between multiple rows of traditional modules between the module side plates, thereby realizing the structure of the large module assembly, improving the grouping rate of the battery cells, and improving the energy density of the battery system assembly; moreover, compared with the existing module structure, only the structure of the module end plate is improved, and the structures of the remaining components can still be used, and the production line tooling fixtures and equipment are not affected and can still be used, so as to realize the structure of the large module assembly at the lowest cost.

[0036] Further, as Figure 2As shown in the figure, a signal acquisition interface 17 is provided on the module end plate of the small module. An integrated busbar and wiring harness board assembly 12 is provided at the electrodes of several battery cells 13 in the small module. The electrodes of several battery cells 13 are connected to the integrated busbar and wiring harness board assembly 12 in the small module. The integrated busbar and wiring harness board assembly 12 leads out the signal acquisition interface, which facilitates the connection and signal transmission between the large module assembly and other devices through this signal acquisition interface.

[0037] In addition, a module upper protective cover 11 is also provided on the top of the small module, and the module upper protective cover 11 is fixedly covered above the electrodes of several battery cells. Further, a heating film 16 is also provided at the bottom of the small module, and the heating film can be electrically connected to an external controller, so that the battery cells of the large module can be heated by controlling the heating film 16 to work in a low-temperature environment, so as to ensure the charge and discharge performance of the battery cells and achieve a better heating effect.

[0038] Embodiment 2

[0039] The present invention also provides an electric vehicle, which includes the large module assembly proposed in Embodiment 1.

[0040] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that, based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A large module assembly, characterized in that, It includes a plurality of small modules, and each small module is locked and fixed by a pair of module end plates and a pair of module side plates; The plurality of small modules are sequentially laid and stacked flat, and the module side plates between two adjacent small modules are in zero contact, and the module end plates of two adjacent small modules are locked and fixedly connected through a module connecting plate.

2. The large module assembly according to claim 1, characterized in that, The small module includes a plurality of serially connected battery cells, and the plurality of battery cells are tightly stacked in columns in the same direction to form a battery cell stacking unit.

3. The large module assembly according to claim 2, characterized in that, The battery cell stacking unit is locked and fixed by the surrounding module end plates and module side plates.

4. The large module assembly according to claim 1, characterized in that, The module end plate includes a module end plate body, the module end plate body is hollow and internally provided with a plurality of reinforcing ribs.

5. The large module assembly according to claim 4, characterized in that, A plurality of blind rivet nuts are symmetrically arranged on both sides of the module end plate body.

6. The large module assembly according to claim 5, wherein The module connecting plate is an L-shaped plate, and a plurality of connecting holes are provided on the module connecting plate, and the positions of the plurality of connecting holes correspond to the positions of the adjacent blind rivet nuts on the module end plate bodies of two adjacent small modules.

7. The large module assembly according to claim 6, characterized in that, A fastening bolt is used to pass through the connecting hole and be fixed to the blind rivet nut, so that the module connecting plate is locked on the module end plates of two adjacent small modules.

8. The large module assembly according to claim 1, characterized in that, A signal acquisition interface is provided on the module end plate of the small module, an integrated busbar and a wiring harness board integrated component are provided at the electrodes of a plurality of battery cells in the small module, the electrodes of the plurality of battery cells are connected to the integrated busbar and the wiring harness board integrated component in the small module, and the integrated busbar and the wiring harness board integrated component lead out the signal acquisition interface.

9. The large module assembly according to claim 1, characterized in that, A heating film is provided at the bottom of the small module.

10. An electric vehicle, characterized in that, The electric vehicle includes a large module assembly as described in any one of claims 1-9.

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