A power battery pack sealing structure

Abstract

The utility model provides a kind of power battery package sealing structure, belong to new energy battery field.The structure includes box frame, liquid cooling plate, sealing glue, liquid cooling plate sealing foam, sealing screw and pull rivet nut, liquid cooling plate is located at the bottom of box frame, sealing glue is set on the bottom surface of box frame, liquid cooling plate sealing foam is set between box frame and liquid cooling plate, sealing screw is set in the periphery and middle of the bottom of liquid cooling plate, penetrates the bottom connection of liquid cooling plate and box frame, pull rivet nut is set in the bottom of liquid cooling plate, penetrates the bottom connection of liquid cooling plate and box frame.The power battery package sealing structure provided by the utility model embodiment can solve the problem of low air tightness of battery package in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, and in particular to a sealing structure for a power battery pack. Background Technology

[0002] With the widespread application of new energy battery packs in electric vehicles, the requirements for the airtightness of power battery packs are becoming increasingly stringent in order to ensure their high safety and stability.

[0003] In existing technologies, the sealing between the battery pack's lower housing frame and the liquid cooling plate is usually achieved by applying sealant or using a gasket. However, this sealing method is relatively simple, and there is a risk of seal failure after a period of use.

[0004] The existing power battery pack sealing structure only uses sealant or gaskets for sealing, resulting in a single sealing method and a risk of leakage, especially at the corners of the battery pack, thus leading to low airtightness of the battery pack. Utility Model Content

[0005] This utility model provides a sealing structure for a power battery pack, which can solve the problem of low airtightness of battery packs in the prior art. The technical solution is as follows:

[0006] A sealing structure for a power battery pack, characterized in that it comprises: a housing frame, a liquid cooling plate, sealant, liquid cooling plate sealing foam, sealing screws, and rivet nuts.

[0007] The liquid cooling plate is located at the bottom of the housing frame. The sealant is applied to the bottom surface of the housing frame. The liquid cooling plate sealing foam is applied between the housing frame and the liquid cooling plate. The sealing screws are applied to the bottom periphery and middle of the liquid cooling plate, penetrating the liquid cooling plate and connecting to the bottom of the housing frame. The rivet nuts are applied to the bottom of the liquid cooling plate, penetrating the liquid cooling plate and connecting to the bottom of the housing frame.

[0008] Optionally, a sealing ring is provided between the liquid cooling plate and the rivet nut.

[0009] Optionally, a bottom protective plate is provided at the bottom of the liquid cooling plate, and a fastening bolt is provided at the bottom of the bottom protective plate. The fastening bolt passes through the bottom protective plate and the liquid cooling plate and connects to the bottom of the housing frame.

[0010] Optionally, a bottom protective plate sealing foam is provided between the bottom protective plate and the liquid cooling plate.

[0011] Optionally, thermal insulation cotton is provided between the bottom protective plate sealing foam and the bottom protective plate.

[0012] Optionally, a lid is provided on the box frame, and a lid sealing gasket is provided between the lid and the box frame.

[0013] Optionally, the rivet nut is a double-bore waterproof rivet nut.

[0014] Optionally, the sealing screw is a flow drill screw.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] This utility model provides a power battery pack sealing structure that achieves double sealing by placing sealant and liquid cooling plate sealing foam between the housing frame and the liquid cooling plate. The liquid cooling plate and housing frame are then fixed with sealing screws, and finally reinforced with rivet nuts. This tightly presses the housing frame and liquid cooling plate together, making the double seal between the housing frame and liquid cooling plate more stable. This improves the sealing performance between the housing frame and liquid cooling plate and effectively solves the problem of low airtightness in existing battery packs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the bottom structure of the box frame provided in this embodiment of the utility model;

[0019] Figure 2 This is an exploded view of the top structure of the box frame provided in this embodiment of the utility model.

[0020] In the diagram: 101-Box body sealing rivet nut; 102-Box cover connecting hole; 103-Box cover fastening bolt; 1-Box body frame; 2-Liquid cooling plate; 3-Sealant; 4-Liquid cooling plate sealing foam; 5-Sealing screw; 6-Rivet nut; 7-Sealing ring; 8-Bottom guard plate; 9-Fasting bolt; 10-Bottom guard plate sealing foam; 11-Insulation cotton; 12-Box cover; 13-Box cover sealing gasket. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] Figure 1This is an exploded view of the bottom structure of the box frame provided in this embodiment of the utility model; Figure 2 This is an exploded view of the top structure of the box frame provided in an embodiment of this utility model. Figures 1 to 2 The power battery pack sealing structure shown includes: a housing frame 1, a liquid cooling plate 2, sealant 3, liquid cooling plate sealing foam 4, sealing screws 5, and rivet nuts 6. The liquid cooling plate 2 is located at the bottom of the housing frame 1. The sealant 3 is disposed on the bottom surface of the housing frame 1. The liquid cooling plate sealing foam 4 is disposed between the housing frame 1 and the liquid cooling plate 2. The sealing screws 5 are disposed on the outer periphery and middle of the bottom of the liquid cooling plate 2, penetrating the liquid cooling plate 2 and connecting to the bottom of the housing frame 1. The rivet nuts 6 are disposed on the bottom of the liquid cooling plate 2, penetrating the liquid cooling plate 2 and connecting to the bottom of the housing frame 1.

[0023] Exemplarily, in this embodiment of the present invention, a gluing robot applies sealant 3 to the bottom of the housing frame 1 between the housing frame 1 and the liquid cooling plate 2. Then, liquid cooling plate sealing foam 4 is adhered to the bottom of the housing frame 1. The liquid cooling plate 2 is then brought close to the liquid cooling plate sealing foam 4, and sealing screws 5 are used to tightly press the housing frame 1 and the liquid cooling plate 2 together. During the pressing process, the sealant 3 is evenly distributed on the outer frame and middle beam of the housing frame 1. Rivet nuts 6 are then installed from the bottom of the liquid cooling plate 2. By inserting bolts or other structures into the rivet nuts 6 for fixing, the fit between the housing frame 1 and the liquid cooling plate 2 can be further deepened, thus forming an effective seal. During the manufacturing process, an airtightness test can be performed on the seal between the housing frame 1 and the liquid cooling plate 2 to determine if it meets the airtightness requirements.

[0024] This utility model provides a power battery pack sealing structure that achieves double sealing by setting sealant 3 and liquid cooling plate sealing foam 4 between the housing frame 1 and the liquid cooling plate 2. Then, the liquid cooling plate 2 and the housing frame 1 are fixed by sealing screws 5, and finally, the liquid cooling plate 2 and the housing frame 1 are reinforced and fixed by rivet nuts 6, so that the housing frame 1 and the liquid cooling plate 2 are tightly pressed together, thereby making the double seal between the housing frame 1 and the liquid cooling plate 2 more stable. This improves the sealing performance between the housing frame 1 and the liquid cooling plate 2 and can effectively solve the problem of low airtightness of battery packs in the prior art.

[0025] Optionally, a sealing ring 7 is provided between the liquid cooling plate 2 and the rivet nut 6.

[0026] For example, in this embodiment of the invention, by providing a sealing ring 7, the sealing performance between the rivet nut 6 and the liquid cooling plate 2 can be enhanced, preventing gaps from forming between the rivet nut 6 and the liquid cooling plate 2 during installation, which would affect the sealing performance of the battery pack. Providing the sealing ring 7 further improves the airtightness of this structure.

[0027] Optionally, a bottom guard plate 8 is provided at the bottom of the liquid cooling plate 2, and a fastening bolt 9 is provided at the bottom of the bottom guard plate 8. The fastening bolt 9 passes through the bottom guard plate 8 and the liquid cooling plate 2 and is connected to the bottom of the housing frame 1.

[0028] For example, in this embodiment of the present invention, in order to enhance the physical protection capability of the battery pack, a bottom guard plate 8 is provided at the bottom of the liquid cooling plate 2, which can prevent impact from the bottom. The bottom guard plate 8 is connected to the housing frame 1 by setting fastening bolts 9, which can further compress the middle multi-layer sealing structure, thereby further improving the airtightness of the structure.

[0029] Optionally, a bottom protective plate sealing foam 10 is provided between the bottom protective plate 8 and the liquid cooling plate 2.

[0030] For example, in this embodiment of the present invention, by adding bottom protective plate sealing foam 10, the sealing performance between bottom protective plate 8 and liquid cooling plate 2 can be further enhanced, thereby further improving the airtightness of the structure.

[0031] Optionally, thermal insulation 11 is provided between the bottom protective plate sealing foam 10 and the bottom protective plate 8.

[0032] For example, in this embodiment of the present invention, by setting the insulation cotton 11, the temperature of the liquid cooling plate 2 can be kept warm, thereby enabling the liquid cooling plate 2 to work more efficiently and cool the battery cell, thereby improving the cooling efficiency of the structure.

[0033] Optionally, a lid 12 is provided on the box frame 1, and a lid sealing gasket 13 is provided between the lid 12 and the box frame 1.

[0034] For example, in this embodiment of the present invention, the battery cells inside the housing frame 1 can be protected from the top by setting the cover 12. The top of the housing frame 1 is also provided with a housing sealing rivet nut 101. The cover is provided with a cover connection hole 102. The cover fastening bolt 103 is set from the top of the cover 12, passes through the cover connection hole 102 and the cover sealing gasket 13, and is then threadedly connected to the cover sealing rivet nut 101 for fixation. This makes the cover 12 and the housing frame 1 stably connected. By setting the cover sealing gasket 13, the sealing between the cover and the housing frame 1 can be guaranteed, thereby further improving the airtightness of the structure.

[0035] Optionally, the rivet nut 6 is a double-bore waterproof rivet nut.

[0036] For example, in this embodiment of the present invention, by setting the rivet nut 6 as a double-protrusion waterproof rivet nut, external water can be prevented from entering the battery pack from the rivet nut 6. By setting this structure, the waterproof performance of the structure is improved.

[0037] Optionally, the sealing screw 5 is a flow drill screw.

[0038] For example, in this embodiment of the invention, the flow drill screw (FDS), also known as a thermoplastic self-tapping screw or thermoplastic fastening screw, can achieve a single-sided connection with minimal deformation and is a detachable fastening method. The flow drill screw is driven into the sheet metal by the high-speed rotation of the motor transmitted through the central tightening shaft of the equipment, which generates frictional heat and plastic deformation. It has several advantages: single-sided operation, the FDS process can be operated from one side without the need for assistance from the other side, simplifying the assembly process; it can connect to multiple materials, including steel and aluminum alloys, making it highly adaptable; high connection strength, the FDS process generates plastic deformation through frictional heat, forming a high-strength connection with strong shock resistance; clean working environment, the FDS process does not generate a large amount of waste and pollution during operation, maintaining a clean working environment; removable screws, the screws connected by FDS can be removed, facilitating subsequent maintenance and replacement; and high efficiency and automation, the FDS process is easy to automate, improving production efficiency.

[0039] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power battery pack sealing structure, characterized in that, include: Box frame (1), liquid cooling plate (2), sealant (3), liquid cooling plate sealing foam (4), sealing screws (5) and rivet nuts (6). The liquid cooling plate (2) is located at the bottom of the housing frame (1), the sealant (3) is placed on the bottom surface of the housing frame (1), the liquid cooling plate sealing foam (4) is placed between the housing frame (1) and the liquid cooling plate (2), the sealing screw (5) is placed on the outer periphery and middle of the bottom of the liquid cooling plate (2), penetrates the liquid cooling plate (2) and connects to the bottom of the housing frame (1), and the rivet nut (6) is placed on the bottom of the liquid cooling plate (2), penetrates the liquid cooling plate (2) and connects to the bottom of the housing frame (1).

2. The power battery pack sealing structure according to claim 1, characterized in that, A sealing ring (7) is provided between the liquid cooling plate (2) and the rivet nut (6).

3. The sealing structure of a power battery pack according to claim 1, characterized in that, The liquid cooling plate (2) is provided with a bottom guard plate (8), and the bottom guard plate (8) is provided with a fastening bolt (9). The fastening bolt (9) passes through the bottom guard plate (8) and the liquid cooling plate (2) and is connected to the bottom of the box frame (1).

4. The sealing structure of a power battery pack according to claim 3, characterized in that, A bottom protective plate sealing foam (10) is provided between the bottom protective plate (8) and the liquid cooling plate (2).

5. The sealing structure of a power battery pack according to claim 4, characterized in that, A heat-insulating cotton (11) is provided between the bottom protective plate sealing foam (10) and the bottom protective plate (8).

6. The sealing structure of a power battery pack according to claim 1, characterized in that, A box cover (12) is provided on the box frame (1), and a box cover sealing gasket (13) is provided between the box cover (12) and the box frame (1).

7. The sealing structure of a power battery pack according to claim 1, characterized in that, The rivet nut (6) is a double-bore waterproof rivet nut.

8. The sealing structure of a power battery pack according to claim 1, characterized in that, The sealing screw (5) is a flow drill screw.

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