Soft package solid-state battery module

Abstract

The utility model provides a soft-package solid-state battery module, which belongs to the field of power battery system integration design and comprises a soft-package solid-state battery assembly, the U-shaped aluminum alloy profile shell is connected with an insulating sheet, and heat-conducting gel is filled among the U-shaped aluminum alloy profile shell, the aluminum alloy profile cover plate and the battery cell; the two ends of the combined U-shaped aluminum alloy profile shell and the two ends of the combined aluminum alloy profile cover plate are each provided with an end face pole assembly. According to the utility model, the heat-insulation fireproof foaming filling material is injected among the soft-package battery cells of the module and is used for preventing the single battery cell from being diffused to the adjacent battery cells in the module when thermal runaway occurs, so that the industrial difficulty problem that the thermal diffusion of the battery cells in the soft-package battery cell module is difficult to restrain is solved; and full-automatic operation of module production and whole-package assembly of the module and the battery system can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery system integrated design technical field especially relates to a soft package solid battery module. BACKGROUND

[0002] With the emergence of global environmental deterioration and resource reduction and so on, the sight of each big car factory shifts to new energy vehicles. Hybrid electric vehicles, pure electric vehicles, range extended electric vehicles and various electric vehicles emerge in an endless stream.

[0003] On new energy electric vehicles, power battery system is a key component. With the increasing demand for power battery system and the gradual improvement of the production efficiency and consistency of battery pack, integrated design of each component of power battery system is imperative. At present, the module of power battery system has no module scheme or large module scheme. The no module scheme has low compatibility of battery system different model products, and the module maintenance is difficult in the later period. The large module scheme requires high module production line, and the module manufacturing cost is high, and the module maintenance cost is high. In order to solve the problem of no module scheme or large module scheme of battery system, a module scheme of soft package solid battery is designed. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model provides a soft package solid battery module.

[0005] The embodiment of the utility model provides a soft package solid battery module, which comprises:

[0006] The U-shaped aluminum alloy profile shell and the aluminum alloy profile cover plate can be combined and installed, and the U-shaped aluminum alloy profile shell and the aluminum alloy profile cover plate form an installation cavity;

[0007] The soft package solid battery assembly comprises a plurality of groups of battery cells which are located in the installation cavity and are stacked together and connected, the U-shaped aluminum alloy profile shell is connected with an insulating sheet, the insulating sheet and the battery cells, and the aluminum alloy profile cover plate and the battery cells are filled with compressed foam, and the U-shaped aluminum alloy profile shell, the aluminum alloy profile cover plate and the battery cells are filled with heat-conducting gel; the two ends of the combined U-shaped aluminum alloy profile shell and aluminum alloy profile cover plate are provided with end face pole column assemblies.

[0008] Further, the U-shaped aluminum alloy profile shell and the aluminum alloy profile cover plate are connected through buckles, and the gap at the abutting position of the U-shaped aluminum alloy profile shell and the aluminum alloy profile cover plate after buckle combination is laser welded.

[0009] Further, the plurality of groups of battery cells are connected through tab welding blocks, the tab welding blocks are connected with collection wire harnesses, and the collection wire harnesses are connected with the end face pole column assemblies.

[0010] Further, one of the two adjacent said battery cells is sprayed with water-based pressure-sensitive adhesive on one side, and the multiple groups of battery cells are positioned by fixing with adhesive tape.

[0011] Further, the end face pole assembly is provided with positive and negative pole marks, a pressure relief port, a voltage and temperature acquisition plug-in, a module pole mounting point and a module fixing support, the pole cover is mounted on the module pole mounting point, and the acquisition wire harness is connected with the voltage and temperature acquisition plug-in.

[0012] Further, foaming glue is injected between the battery cells.

[0013] Compared with the prior art, the soft package solid-state battery module has the following beneficial effects:

[0014] The foaming filling material is injected between the soft package battery cells of the module, so that the heat diffusion of the soft package battery cells in the module is difficult to suppress, the design scheme of the module form can realize full-automatic operation of module production, module and battery system whole package assembly in the battery system integration assembly process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the soft package solid-state battery module.

[0016] Figure 2 It is a schematic view of removing the aluminum alloy profile cover plate in the soft package solid-state battery module.

[0017] Figure 3 It is a split view of the pole cover in the soft package solid-state battery module.

[0018] Figure 4 It is a schematic view of the end face pole assembly in the soft package solid-state battery module.

[0019] Figure 5 It is a clamping view of the U-shaped aluminum alloy profile shell and the aluminum alloy profile cover plate in the soft package solid-state battery module.

[0020] In the above drawings: 1 U-shaped aluminum alloy profile shell, 2 aluminum alloy profile cover plate, 3 pole cover, 4 end face pole assembly, 5 module fixing support, 6 acquisition wire harness, 7 insulating sheet, 8 heat-conducting gel, 9 compressed foam, 10 battery cell, 11 water-based pressure-sensitive adhesive, 12 adhesive tape, 13 pole lug welding block, 14 foaming glue, 15 positive and negative pole marks, 16 pressure relief port, 17 voltage and temperature acquisition plug-in, 18 module pole mounting point. DETAILED DESCRIPTION

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-5 As shown in the figure, this utility model embodiment proposes a soft-pack solid-state battery module, including:

[0023] The U-shaped aluminum alloy profile shell 1 and aluminum alloy profile cover plate 2 can be assembled together to form an installation cavity. The U-shaped aluminum alloy profile shell 1 and aluminum alloy profile cover plate 2 are connected by snap fasteners. The gap at the abutting point of the U-shaped aluminum alloy profile shell 1 and aluminum alloy profile cover plate 2 after snap fastening is laser welded. This weld only serves to press the seam together and prevent it from falling apart. The clamping force of the U-shaped aluminum alloy profile shell 1 on the internal battery cell 10 and the overall structural strength of the module are borne by the shell snap fasteners (snap-fit ​​structure).

[0024] A pouch solid-state battery module; the pouch solid-state battery module includes multiple sets of cells 10 that are stacked together and connected in the mounting cavity. The welded cell sets are placed in the mounting cavity and positioned and snapped into place with the positioning points of the U-shaped aluminum alloy profile shell 1. The multiple sets of cells 10 are welded together by tab welding blocks 13. The tab welding blocks 13 are connected to a data acquisition harness 6, which is connected to the end face terminal assembly 4. The multiple sets are placed in the corresponding positions, and the tab welding blocks 13 and the end face terminal assembly 4 are placed in the mounting cavity. After positioning, the cell tabs are welded together by laser to realize the parallel and series combination of the cells 10.

[0025] The connection between multiple sets of battery cells 10 is explained as follows: water-based pressure-sensitive adhesive 11 is sprayed onto one side of one of two adjacent battery cells 10, and the multiple sets of battery cells 10 are pre-positioned by tape 12.

[0026] An insulating sheet 7 is connected to the U-shaped aluminum alloy profile shell 1. Compressed foam 9 is filled between the insulating sheet 7 and the battery cell 10, and between the aluminum alloy profile cover plate 2 and the battery cell 10. Thermally conductive gel 8 is filled between the U-shaped aluminum alloy profile shell 1, the aluminum alloy profile cover plate 2 and the battery cell 10. The required amount of glue is injected into the battery cell 10 groups in the module through the injection hole of the module shell using a foaming glue injection device 14. The glue can complete the foaming and filling of the gap in a short time, realizing heat insulation and flame retardancy between adjacent battery cells.

[0027] The assembled U-shaped aluminum alloy profile shell 1 and aluminum alloy profile cover plate 2 are both provided with end face pole assemblies 4, and the end face pole assemblies 4 are provided with positive and negative pole marks 15, pressure relief openings 16, voltage and temperature collection plug-ins 17, module pole mounting points 18 and module fixing supports 5, the module fixing supports 5 are used for mounting the whole device on corresponding supports, and the module pole mounting points 18 are provided with pole covers 3 for protection, collection harnesses 6 are connected with the voltage and temperature collection plug-ins 17, the voltage and temperature collection plug-ins 17 are sensors and can detect the temperature at the battery cell 10, and corresponding sensors such as temperature sensors are used.

[0028] The utility model discloses a module shell is aluminium extrusion section bar, and the inside integrated foamed rubber pad that absorbs the life cycle of battery cell and swells, and the inside integrated collection harness and sensor of voltage / temperature collection, and the inside integrated heat-conducting insulating medium, and the design has pressure relief opening, and the module has two end module fixing supports. And innovatively inject the heat insulation fireproof foaming filling material between the soft package battery cell of module, for blocking the single battery cell when the thermal runaway does not spread to the adjacent battery cell in module, solve the industry difficult problem of the difficult inhibition of battery cell thermal diffusion in soft package battery cell module. The design scheme of the module form, in the battery system integration assembly process, can realize the full-automatic operation of module production, module and battery system whole package assembly.

[0029] Finally, it is pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and they should be covered in the scope of the claims of the utility model.

Claims

1. A soft-pack solid-state battery module, characterized by, Include: The U-shaped aluminum alloy profile shell (1) and the aluminum alloy profile cover plate (2) can be combined and installed, and the U-shaped aluminum alloy profile shell (1) and the aluminum alloy profile cover plate (2) form an installation cavity; The soft package solid state battery assembly includes a plurality of groups of battery cells (10) located in the installation cavity and stacked together and connected, the U-shaped aluminum alloy profile shell (1) is connected with an insulating sheet (7), the insulating sheet (7) and the battery cell (10) are filled with compressed foam (9), and the U-shaped aluminum alloy profile shell (1) and the aluminum alloy profile cover plate (2) are filled with heat-conducting gel (8); The two ends of the combined U-shaped aluminum alloy profile shell (1) and aluminum alloy profile cover plate (2) are provided with end face pole assembly (4), and the battery cells (10) are injected with foaming glue (14).

2. The soft-pack solid battery module according to claim 1, characterized by, Wherein: The U-shaped aluminum alloy profile shell (1) and the aluminum alloy profile cover plate (2) are connected by buckles, and the gap between the combined U-shaped aluminum alloy profile shell (1) and the aluminum alloy profile cover plate (2) is welded by laser.

3. The soft-pack solid battery module according to claim 1, characterized by, Wherein: A plurality of groups of battery cells (10) are connected by tab welding blocks (13), the tab welding blocks (13) are connected with collection wire harnesses (6), and the collection wire harnesses (6) are connected with end face pole assembly (4).

4. The soft-pack solid battery module according to claim 1, characterized by, Wherein: One of the two adjacent battery cells (10) is sprayed with water-based pressure-sensitive adhesive (11) on one side, and the plurality of groups of battery cells (10) are positioned by adhesive tape (12).

5. The soft-pack solid battery module according to claim 1, characterized by, Wherein: The end face pole assembly (4) is provided with positive and negative pole marks (15), a pressure relief port (16), a voltage and temperature collection plug-in (17), a module pole mounting point (18), and a module fixing support (5), the module pole mounting point (18) is provided with a pole cover (3), and the collection wire harness (6) is connected with the voltage and temperature collection plug-in (17).

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