Battery pack structure with anti-module expansion function and liquid cooling structure

Abstract

This utility model discloses a battery pack structure with anti-module expansion function and liquid cooling structure, including a housing structure and battery modules arranged inside the housing structure. The top cover and bottom plate of the housing structure are both liquid cooling plates, and the battery modules are arranged in a side-mounted manner inside the housing structure. The sides of the battery cells of the battery modules are respectively attached to the corresponding liquid cooling plates of the housing structure. The housing structure has a reinforcing structure that contacts the sides of the battery modules. The improved housing structure of this utility model uses the liquid cooling plates of the battery pack as the bottom and top cover of the battery pack housing, and the side-mounted arrangement of the battery modules allows the upper and lower liquid cooling plates to be attached to the two sides of the battery cells of the modules respectively. Compared with the method of attaching the module to one side, this solves the problem of uneven heat dissipation of the battery cells. At the same time, the reinforcing structure on the inner wall of the housing that contacts the corresponding sides of the battery modules can improve the anti-module expansion capability of the battery pack structure.

Description

Technical Field

[0001] This utility model relates to the technical field of battery liquid cooling structure and battery box structure design, and in particular to a battery pack structure with anti-module expansion function and liquid cooling structure. Background Technology

[0002] Currently, existing battery packs with liquid cooling typically address the issue of cell expansion forces within the module by welding or bolting metal end plates to side plates within the module structure design. The liquid cooling function of the battery pack is usually achieved by attaching liquid cooling plates between every two adjacent modules, using these plates to dissipate heat from the sides of the module, thus achieving liquid cooling.

[0003] If the module itself is to resist the expansion force of the battery cell, a structure with sufficient strength must be designed around the module. Traditional end-plate and side-plate fixing methods increase both the overall dimensions and material costs. Integrating the expansion resistance function into the housing allows for cost-effective and optimized module design, especially when the module's length is limited, necessitating a simplified design.

[0004] Secondly, regarding the application of liquid cooling plates in liquid-cooled battery packs, sandwiching them between modules typically only allows for the liquid cooling plate to be attached to a single side of the module. This does not achieve better uniform heat dissipation for the module.

[0005] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a battery pack structure with anti-module expansion function and liquid cooling structure. Utility Model Content

[0006] The purpose of this invention is to provide a battery pack structure with anti-module expansion function and liquid cooling structure. The improved box structure uses the liquid cooling plate of the battery pack as the bottom and cover of the battery pack box, and the battery modules are arranged on the side so that the upper and lower liquid cooling plates are respectively attached to the two sides of the module cells. Compared with the method of attaching the module to one side, it solves the problem of uneven heat dissipation of the cells. At the same time, the inner wall of the box is provided with a reinforcing structure that contacts the corresponding side of the battery module, which can improve the anti-module expansion capability of the battery pack structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model discloses a battery pack structure with anti-module expansion function and liquid cooling structure, which includes:

[0009] Box structure; and

[0010] Battery modules arranged inside the housing structure;

[0011] The top cover and bottom plate of the box structure are both liquid cooling plates, and the battery module is arranged in the box structure in a side-mounted manner. The sides of the battery cells of the battery module are respectively attached to the corresponding liquid cooling plates of the box structure.

[0012] The housing structure has a reinforcing structure inside that contacts the side of the battery module.

[0013] Furthermore, the housing structure includes a housing frame-shaped enclosure with a quadrilateral frame structure, and the interior space of the housing frame-shaped enclosure is a space for accommodating the battery module;

[0014] The top of the box structure is a top liquid cooling plate for the battery box, and the bottom of the box structure is a bottom liquid cooling plate for the battery box.

[0015] The inlet of the liquid cooling plate on the top of the battery box is connected to the outlet of the liquid cooling plate on the bottom of the battery box via a conduit; the outlet of the liquid cooling plate on the top of the battery box is connected to the inlet of the liquid cooling plate on the bottom of the battery box via a conduit.

[0016] Furthermore, the end of the battery cell of the battery module faces the end plate side of the box frame enclosure;

[0017] The two sides of the battery module along the stacking direction of the battery cells are in contact with the reinforcing structure of the inner wall of the box frame panel.

[0018] Furthermore, the reinforcing structure is configured to be fixed to the inner wall of the box frame enclosure and protrude toward the inner side of the box frame enclosure.

[0019] Furthermore, the reinforcing structure includes a central protrusion and connecting portions located on both sides of the protrusion;

[0020] The reinforcing structure is connected to the inner wall of the box frame panel through the connecting parts on both sides, and the protrusion contacts the side of the corresponding side of the battery module.

[0021] Furthermore, at least two of the reinforcing structures are provided on one side of the battery module.

[0022] Furthermore, when the battery module is a pouch module, the pouch module is fixedly connected around its perimeter by long bolts.

[0023] Furthermore, when the battery module is a general-purpose module, an insulating side plate is attached to the side of the general-purpose module that is in contact with the top liquid cooling plate and the bottom liquid cooling plate of the battery box using structural adhesive.

[0024] Furthermore, the thickness of the insulating side plate is no greater than 1 mm.

[0025] In the above technical solution, the battery pack structure with anti-module expansion function and liquid cooling structure provided by this utility model has the following beneficial effects:

[0026] The improved battery pack structure of this utility model uses the liquid cooling plate of the battery pack as the bottom and cover of the battery pack box, and the battery modules are arranged on the side so that the upper and lower liquid cooling plates are respectively attached to the two sides of the module cells. Compared with the method of attaching the module to one side, it solves the problem of uneven heat dissipation of the cells. At the same time, the inner wall of the box is provided with a reinforcing structure that contacts the corresponding side of the battery module, which can improve the battery pack structure's resistance to module expansion. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 This is a schematic diagram of a battery pack structure with anti-module expansion function and liquid cooling structure disclosed in an embodiment of this application.

[0029] Figure 2 This is an exploded view of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in the embodiments of this application.

[0030] Figure 3 This is a perspective view of the housing structure of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in the embodiments of this application;

[0031] Figure 4 This is a top view of a battery pack structure with anti-module expansion function and liquid cooling structure disclosed in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the reinforcing structure inside the housing structure of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the housing structure of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in the embodiments of this application;

[0034] Figure 7 This is a schematic diagram of the battery module in Embodiment 1 of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in this application, when the battery module is a soft pack module;

[0035] Figure 8This is a schematic diagram of the battery module in Embodiment 2 of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in this application, when the battery module is a general module;

[0036] Figure 9 This is an exploded view of the battery module in Embodiment 2 of the battery pack structure with anti-module expansion function and liquid cooling structure disclosed in this application, when the battery module is a general module.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Box structure;

[0039] 1. Battery box frame panels; 2. Top liquid cooling plate of the battery box; 3. Bottom liquid cooling plate of the battery box; 4.

[0040] 5. Battery module; 6. Conduit; 7. Reinforcing structure;

[0041] 401. Long bolt; 402. Insulating side plate;

[0042] 601. Protrusion; 602. Connecting part. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0044] See Figures 1 to 9 As shown;

[0045] This embodiment discloses a battery pack structure with anti-module expansion function and liquid cooling structure, which includes:

[0046] Box structure 10; and

[0047] Battery module 4 is arranged inside the housing structure 10;

[0048] The top cover and bottom plate of the housing structure 10 are both liquid cooling plates, and the battery module 4 is arranged in the housing structure 10 in a side-mounted manner. The sides of the battery cells of the battery module 4 are respectively attached to the corresponding liquid cooling plates of the housing structure 10.

[0049] The housing structure 10 has a reinforcing structure 6 inside that contacts the side of the battery module 4.

[0050] Specifically, this embodiment discloses a battery pack structure with anti-module expansion capability and liquid cooling function. Its exterior is a housing structure 10, and the interior houses the battery module 4. In this embodiment, the top cover and bottom plate of the housing structure 10 are both directly made of liquid cooling plates. Simultaneously, the battery module 4 is laid down and placed sideways inside the housing structure 10. This allows the liquid cooling plates on the top and bottom of the housing structure 10 to directly contact both sides of the battery cell of the battery module 4, achieving double-sided heat dissipation and ensuring uniform heat dissipation. While ensuring double-sided heat dissipation, this embodiment also provides a reinforcing structure 6 at the contact point between the housing structure 10 and the side of the battery module 4. This reinforcing structure 6 provides anti-expansion function to the battery module 4 in the form of reinforcing ribs, acting as a buffer.

[0051] Preferably, the box structure 10 of this embodiment includes a box frame-shaped enclosure 1 with a quadrilateral frame structure, and the internal space of the box frame-shaped enclosure 1 is a space for accommodating the battery module 4.

[0052] The top of the housing structure 10 is the top liquid cooling plate 2 of the battery box, and the bottom of the housing structure 10 is the bottom liquid cooling plate 3 of the battery box.

[0053] The water inlet of the top liquid cooling plate 2 of the battery box and the water outlet of the bottom liquid cooling plate 3 of the battery box are connected by a conduit 5; the water outlet of the top liquid cooling plate 2 of the battery box and the water inlet of the bottom liquid cooling plate 3 of the battery box are connected by a conduit 5.

[0054] First, see Figure 1 and Figure 2 As shown, this embodiment further defines the composition of the housing structure 10. Its main body is a housing frame-shaped panel 1, which has a quadrilateral frame structure. The aforementioned top liquid cooling plate 2 and bottom liquid cooling plate 3 are respectively provided at the upper and lower ends of the housing frame-shaped panel 1 as a top cover and a bottom plate. When the battery module 4 is sealed inside the housing structure 10, it can directly contact the two sides of the battery cell of the battery module 4 through the top liquid cooling plate 2 and the bottom liquid cooling plate 3 to achieve dual-sided heat dissipation. Furthermore, it should be noted that the specific structure of the top liquid cooling plate 2 and the bottom liquid cooling plate 3 in this embodiment has been protected in other applications of the applicant. Therefore, this application only briefly outlines their structure and principle. Both the top liquid cooling plate 2 and the bottom liquid cooling plate 3 include a liquid-cooled hollow aluminum plate, with a cooling medium channel formed inside the liquid-cooled hollow aluminum plate; and a liquid cooling plate inlet and a liquid cooling plate outlet located at one end of the liquid cooling hollow aluminum plate and connected to its internal cooling medium channel.

[0055] See Figure 2 As shown, in this embodiment, the end of the battery cell of the battery module 4 faces the end plate of the box frame 1; secondly, the two sides of the battery module 4 along the stacking direction of the battery cells contact the reinforcing structure 6 of the inner wall of the box frame 1.

[0056] See Figures 3 to 6 As shown, in a preferred embodiment, the reinforcing structure 6 of this embodiment is configured to be fixed to the inner wall of the box frame panel 1 and protrude toward the inner side of the box frame panel 1.

[0057] The reinforcing structure 6 in this embodiment is configured as a "π-shaped structure". Specifically, the reinforcing structure 6 in this embodiment includes a central protrusion 601 and connecting portions 602 located on both sides of the protrusion 601.

[0058] The reinforcing structure 6 is connected to the inner wall of the box frame panel 1 through the connecting parts 602 on both sides, and the protrusion 601 contacts the side of the corresponding side of the battery module 4.

[0059] More preferably, the battery module 4 in this embodiment has at least two reinforcing structures 6 on one side.

[0060] First, the module design does not require the expansion force caused by the expansion of the cell belly, which can eliminate the need for the high-strength end plates in the stacking direction in traditional module designs. Only two insulating end plates need to be placed at both ends of the module.

[0061] The module design in this embodiment can adopt the methods of the two embodiments described above, as follows:

[0062] See Figure 7 As shown, Example 1:

[0063] In this embodiment, when the battery module 4 is a soft-pack module, the four sides of the soft-pack module are fixedly connected by long bolts 401.

[0064] See Figure 8 and Figure 9 As shown, Example 2:

[0065] In this embodiment two, when the battery module 4 is a universal module, an insulating side plate 402 is attached to the side of the universal module that is in contact with the top liquid cooling plate 2 and the bottom liquid cooling plate 3 of the battery box using structural adhesive. In this embodiment two, the thickness of the insulating side plate 402 is no more than 1mm, allowing all the battery cells to be bonded together as one unit via the upper and lower side plates and structural adhesive.

[0066] Both structures involved in this embodiment can be designed to create end-plate-less modules, which are placed sideways within a box structure with a liquid-cooled plate as the bottom. The battery module 4 is fixed to the liquid-cooled plate 3 at the bottom of the battery box with adhesive. Simultaneously, reinforcing ribs of the aforementioned "π-shaped structure" are welded to the box frame 1 around the box structure 10, corresponding to the areas prone to bulging of the battery module 4's cells. The height of the reinforcing ribs must meet resistance requirements while allowing for a gap for the battery module 4 to enter the box. After completing all installation and testing work before sealing the box, the top liquid-cooled plate 2 is finally installed. Adhesive is applied to the contact surface with the battery module 4 and the upper edge of the box frame 1, and screws are used for fixation, ensuring the overall sealing of the box. The liquid-cooled plate adheres to both sides of the battery module 4, more effectively solving the problem of uneven heat dissipation.

[0067] In the above technical solution, the battery pack structure with anti-module expansion function and liquid cooling structure provided by this utility model has the following beneficial effects:

[0068] The improved battery pack structure 10 of this utility model uses the liquid cooling plate of the battery pack as the bottom and cover of the battery pack box, and the battery module 4 is arranged on the side so that the upper and lower liquid cooling plates are respectively attached to the two sides of the module cell. Compared with the method of attaching the module to one side, it solves the problem of uneven heat dissipation of the cell. At the same time, the inner wall of the box is provided with a reinforcing structure 6 that contacts the corresponding side of the battery module, which can improve the battery pack structure's resistance to module expansion.

[0069] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A battery pack structure with anti-module expansion function and liquid cooling structure, the structure comprising: Box structure (10); as well as Battery module (4) arranged inside the housing structure (10); Its features are: The top cover and bottom plate of the box structure (10) are both liquid cooling plates, and the battery module (4) is arranged in the box structure (10) in a side-mounted manner. The side of the battery cell of the battery module (4) is respectively attached to the corresponding liquid cooling plate of the box structure (10). The housing structure (10) has a reinforcing structure (6) inside that contacts the side of the battery module (4). 2.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 1, wherein, The box structure (10) includes a box frame panel (1) with a quadrilateral frame structure, and the internal space of the box frame panel (1) is a space for accommodating the battery module (4); The top of the box structure (10) is a top liquid cooling plate (2) for the battery box, and the bottom of the box structure (10) is a bottom liquid cooling plate (3) for the battery box. The inlet of the top liquid cooling plate (2) of the battery box is connected to the outlet of the bottom liquid cooling plate (3) of the battery box through a conduit (5); the outlet of the top liquid cooling plate (2) of the battery box is connected to the inlet of the bottom liquid cooling plate (3) of the battery box through a conduit (5). 3.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 2, characterized in that, The end of the battery cell of the battery module (4) faces the end plate side of the box frame enclosure (1); The battery module (4) has two sides along the stacking direction of the battery cells in contact with the reinforcing structure (6) of the inner wall of the box frame panel (1). 4.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 2, characterized in that, The reinforcing structure (6) is configured to be fixed to the inner wall of the box frame panel (1) and protrude toward the inner side of the box frame panel (1).

5. The battery pack structure having an anti-module swelling function and a liquid cooling structure according to claim 4, characterized by, The reinforcing structure (6) includes a central protrusion (601) and connecting portions (602) located on both sides of the protrusion (601); The reinforcing structure (6) is connected to the inner wall of the box frame panel (1) through the connecting parts (602) on both sides, and the protrusion (601) contacts the side of the corresponding side of the battery module (4).

6. The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 4 or 5, characterized in that, At least two of the reinforcing structures (6) are provided on one side of the battery module (4). 7.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 2, characterized in that, When the battery module (4) is a soft-pack module, the soft-pack module is fixedly connected around its perimeter by long bolts (401). 8.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 2, wherein, When the battery module (4) is a general-purpose module, an insulating side plate (402) is attached to the side of the general-purpose module that is in contact with the top liquid cooling plate (2) and the bottom liquid cooling plate (3) of the battery box by structural adhesive. 9.The battery pack structure with anti-module swelling function and liquid cooling structure according to claim 8, characterized in that, The thickness of the insulating side plate (402) is no more than 1 mm.

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