Waterproof sealing structure of battery pack

Abstract

The utility model provides a battery pack waterproof sealing structure which comprises a battery pack, an end cover and a terminal, the end cover is fixedly connected above the battery pack through a screw, and the top of the end cover is fixedly connected with the terminal. The sealing structure has the advantages that the first sealing ring, the second sealing ring and the third sealing ring are designed in a high-low staggered and stepped mode, after the first sealing ring, the second sealing ring and the third sealing ring are matched with the bottom edge opening, the contact area is larger, and the sealing reliability is improved. By adopting the design, water and other liquid can be effectively prevented from entering the battery pack. Meanwhile, gaps and uneven parts at the joints can be more effectively filled through the stepped design, and the risk of leakage is reduced. Even under the condition that the external environment changes or is impacted, the sealing ring can keep good sealing performance, a safety sealing structure is designed, the protruding part at the bottom end of the edge ring is plugged between the second sealing ring and the third sealing ring, the sealing performance of the connecting position of the battery pack and the end cover can be further improved, and sealing is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a waterproof sealing structure of a battery pack. Background Art

[0002] With the popularization and application of lithium batteries, lithium battery products such as power tools, shared travel, and smart homes have developed rapidly in recent years. The application scope of lithium batteries is getting wider and wider, and the safety requirements for battery packs are getting higher and higher. The waterproof performance of battery packs has always been the focus of safety research.

[0003] At present, the waterproof structure of the battery pack generally adopts a sealing ring, and the material of the sealing ring is generally soft silicone rubber. The sealing ring is assembled between the battery housing and the battery module, and a sealing effect is achieved by squeezing the sealing ring through interference fit. However, it is not reliable to achieve a comprehensive sealing of the battery pack by relying only on a single sealing ring of conventional shape. Therefore, a battery pack waterproof sealing structure is proposed to solve the above problem. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] To this end, one purpose of the present invention is to provide a waterproof sealing structure for a battery pack to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned object, an embodiment of one aspect of the utility model provides a battery pack waterproof sealing structure, comprising a battery pack, an end cover, and a terminal, wherein the upper part of the battery pack is fixedly connected to the end cover by screws, and the top of the end cover is fixedly connected to the terminal;

[0007] The bottom of the end cover is fixedly connected with a bottom edge, and the cross section of the bottom edge is stepped;

[0008] The top surface of the battery pack is fixedly connected with a first sealing ring, a second sealing ring and a third sealing ring, and the top surfaces of the first sealing ring, the second sealing ring and the third sealing ring abut against the bottom surface of the bottom edge;

[0009] The lowest part of the bottom edge is fixedly connected with an edge ring, and the bottom end of the edge ring is convex;

[0010] A gap is arranged between the second sealing ring and the third sealing ring, and the edge ring is inserted between the second sealing ring and the third sealing ring.

[0011] Preferably, any of the above schemes has a top surface of the battery pack with a reserved alignment hole for screw thread connection, and the end cover is made of aluminum oxide.

[0012] Adopting the above technical solution: this battery pack adopts a new waterproof sealing structure.

[0013] Installation basis: The end cover is connected to the top surface of the battery pack by screws, the screws are threadedly connected to the reserved holes on the top surface of the battery pack, the screws are inserted into the predetermined position of the end cover, the screws are tightened, and the bottom edge is tightly abutted against the top of the first sealing ring, the second sealing ring and the third sealing ring to achieve a waterproof seal.

[0014] Preferably, any of the above schemes is that a sealing ring is provided at the mounting screw on the end cover at the corresponding position where the screw is inserted into the end cover.

[0015] Adopting the above technical solution: This battery pack adopts a new waterproof sealing structure: a stepped bottom edge design, a stepped design of one sealing ring, two sealing rings and three sealing rings, and a design along the ring. The core advantages are: after the screws are tightened, the bottom of the bottom edge is tightly against the top of the first sealing ring, the second sealing ring and the third sealing ring to achieve a waterproof seal. The first sealing ring, the second sealing ring and the third sealing ring are designed in a high-low staggered and stepped manner. When combined with the bottom edge, the contact area is larger, which increases the reliability of the seal. This design can more effectively prevent moisture and other liquids from entering the battery pack, thereby ensuring the safe operation of the battery pack. At the same time, the stepped design can more effectively fill the gaps and uneven parts of the joints, reducing the risk of leakage. Even when the external environment changes or is impacted, the sealing ring can maintain its good sealing performance.

[0016] At the same time, a safety sealing structure, i.e. a ring-shaped structure, is designed, in which the raised portion at the bottom end of the ring is inserted between the second sealing ring and the third sealing ring, which can effectively ensure a more efficient seal between the second sealing ring and the third sealing ring, further improve the sealing performance at the connection between the battery pack and the end cover, and make the seal more reliable.

[0017] Preferably, any of the above schemes is that the bottom edge is made of ceramic material, and the height of the bottom edge increases from the outside to the inside.

[0018] Preferably, any of the above schemes has the height of the first sealing ring being greater than the height of the second sealing ring, and the height of the second sealing ring being greater than the height of the third sealing ring.

[0019] Preferably, the first sealing ring is located outside the second sealing ring, the second sealing ring is located outside the third sealing ring, the first sealing ring, the second sealing ring and the third sealing ring are all made of rubber. The edge ring is bonded to the bottom edge, and the edge ring is made of ceramic.

[0020] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0021] The waterproof sealing structure of the battery pack is arranged through the coordination of the bottom edge, the first sealing ring, the second sealing ring, the third sealing ring, and the edge ring. The new waterproof sealing structure adopted by the battery pack is: the stepped bottom edge design, the stepped design of the first sealing ring, the second sealing ring and the third sealing ring, and the edge ring design. The core advantages are: after the screws are tightened, the lower part of the bottom edge is tightly abutted against the upper part of the first sealing ring, the second sealing ring and the third sealing ring to achieve waterproof sealing. The first sealing ring, the second sealing ring and the third sealing ring are staggered and stepped in height. After cooperating with the bottom edge, the contact area is larger, which increases the reliability of the seal. This design can more effectively prevent moisture and other liquids from entering the battery pack, thereby ensuring the safe operation of the battery pack. At the same time, the stepped design can more effectively fill the gaps and uneven parts of the joints, reducing the risk of leakage. Even when the external environment changes or is impacted, the sealing ring can maintain its good sealing performance.

[0022] At the same time, a safety sealing structure, i.e., a ring-shaped structure, is designed, in which the raised portion at the bottom end of the ring is inserted between the second sealing ring and the third sealing ring, which can further improve the sealing performance of the connection between the battery pack and the end cover and make the seal more reliable.

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

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of the utility model from the first perspective;

[0026] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the sealing part of the utility model.

[0028] In the figure: 1-battery pack, 2-end cover, 3-terminal, 4-screw, 5-bottom edge, 6-first sealing ring, 7-second sealing ring, 8-third sealing ring, 9-edge ring. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-3 As shown, the waterproof sealing structure of the battery pack includes a battery pack 1, an end cover 2, and a terminal 3. The end cover 2 is fixedly connected to the top of the battery pack 1 by screws 4, and the top of the end cover 2 is fixedly connected to the terminal 3;

[0032] The bottom of the end cover 2 is fixedly connected with a bottom edge 5, and the cross section of the bottom edge 5 is stepped;

[0033] The top surface of the battery pack 1 is fixedly connected with a first sealing ring 6, a second sealing ring 7 and a third sealing ring 8, and the top surfaces of the first sealing ring 6, the second sealing ring 7 and the third sealing ring 8 abut against the bottom surface of the bottom edge 5;

[0034] The lowest part of the bottom edge 5 is fixedly connected with an edge ring 9, and the bottom end of the edge ring 9 is convex;

[0035] A gap is provided between the second sealing ring 7 and the third sealing ring 8 , and the edge ring 9 is inserted between the second sealing ring 7 and the third sealing ring 8 .

[0036] Embodiment 1: The top surface of the battery pack 1 is reserved with a positioning hole that is threadedly connected to the screw 4, and the material of the end cover 2 is alumina. This battery pack 1 adopts a new waterproof sealing structure. Installation basis: The end cover 2 is connected to the top surface of the battery pack 1 by screws 4, and the screws 4 are threadedly connected to the reserved holes on the top surface of the battery pack 1. The screws are inserted into the predetermined position of the end cover 2, and the screws 4 are tightened. The bottom of the bottom edge 5 is tightly abutted against the top of the first sealing ring 6, the second sealing ring 7 and the third sealing ring 8 to achieve a waterproof seal.

[0037] Embodiment 2: The screw 4 is inserted into the corresponding part of the end cover 2, and a sealing ring is provided at the mounting screw 4 on the end cover 2. The bottom edge 5 is made of ceramic material, and the height of the bottom edge 5 increases from the outside to the inside. The height of the first sealing ring 6 is greater than the height of the second sealing ring 7, and the height of the second sealing ring 7 is greater than the height of the third sealing ring 8. The first sealing ring 6 is located on the outside of the second sealing ring 7, and the second sealing ring 7 is located on the outside of the third sealing ring 8. The first sealing ring 6, the second sealing ring 7 and the third sealing ring 8 are all made of rubber. The edge ring 9 is bonded to the bottom edge 5, and the edge ring 9 is made of ceramic material.

[0038] The working principle of the utility model is as follows:

[0039] The end cover 2 is connected to the top surface of the battery pack 1 by means of screws 4, which are threadedly connected to the reserved holes on the top surface of the battery pack 1. The screws are inserted into the predetermined positions of the end cover 2, and the screws 4 are tightened. The bottom of the bottom edge 5 is tightly abutted against the tops of the first sealing ring 6, the second sealing ring 7, and the third sealing ring 8 to achieve waterproof sealing; the first sealing ring 6, the second sealing ring 7, and the third sealing ring 8 are designed in a staggered and stepped manner, and after being matched with the bottom edge 5, the contact area is larger, thereby increasing the reliability of the seal;

[0040] A safety sealing structure is designed, i.e., a structure along the ring 9 , in which the bottom protrusion of the ring 9 is inserted between the second sealing ring 7 and the third sealing ring 8 , which can further improve the sealing performance of the connection between the battery pack 1 and the end cover 2 .

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The waterproof sealing structure of the battery pack is provided by the matching arrangement of the bottom edge 5, the first sealing ring 6, the second sealing ring 7, the third sealing ring 8, and the edge ring 9. The new waterproof sealing structure adopted by the battery pack 1 is: the stepped bottom edge 5 design, the stepped design of the first sealing ring 6, the second sealing ring 7 and the third sealing ring 8, and the design of the edge ring 9. The core advantage is that after the screw 4 is tightened, the bottom of the bottom edge 5 is tightly abutted against the top of the first sealing ring 6, the second sealing ring 7 and the third sealing ring 8 to achieve waterproof sealing. The first sealing ring 6, the second sealing ring 7 and the third sealing ring 8 are staggered and stepped in height. After matching with the bottom edge 5, the contact area is larger, which increases the reliability of the seal. This design can more effectively prevent moisture and other liquids from entering the battery pack, thereby ensuring the safe operation of the battery pack. At the same time, the stepped design can more effectively fill the gaps and uneven parts of the joints, reducing the risk of leakage. Even when the external environment changes or is impacted, the sealing ring can maintain its good sealing performance.

[0043] At the same time, a safety sealing structure is designed, namely, a structure along the ring 9, in which the bottom end protrusion of the ring 9 is inserted between the second sealing ring 7 and the third sealing ring 8, which can further improve the sealing performance of the connection between the battery pack 1 and the end cover 2 and make the sealing more reliable.

Claims

1. A battery pack waterproof sealing structure, characterized in that: The battery pack (1) comprises an end cover (2) and a terminal (3), wherein the upper part of the battery pack (1) is fixedly connected to the end cover (2) by means of screws (4), and the top of the end cover (2) is fixedly connected to the terminal (3); the bottom of the end cover (2) is fixedly connected to a bottom edge (5), and the cross section of the bottom edge (5) is stepped; The top surface of the battery pack (1) is fixedly connected to a first sealing ring (6), a second sealing ring (7) and a third sealing ring (8), and the top surfaces of the first sealing ring (6), the second sealing ring (7) and the third sealing ring (8) abut against the bottom surface of the bottom edge (5); the lowest point of the bottom edge (5) is fixedly connected to an edge ring (9), and the bottom end of the edge ring (9) is convex; A gap is provided between the second sealing ring (7) and the third sealing ring (8), and the edge ring (9) is inserted between the second sealing ring (7) and the third sealing ring (8).

2. A battery pack waterproof sealing structure as claimed in claim 1, characterized in that: The top surface of the battery pack (1) is provided with a positioning hole for threaded connection with the screw (4), and the material of the end cover (2) is aluminum oxide.

3. A battery pack waterproof sealing structure as claimed in claim 2, characterized in that: The screw (4) is inserted into the corresponding position of the end cover (2), and a sealing ring is provided at the mounting screw (4) on the end cover (2).

4. A battery pack waterproof sealing structure as claimed in claim 3, characterized in that: The bottom edge (5) is made of ceramic material, and the height of the bottom edge (5) increases from the outside to the inside.

5. A battery pack waterproof sealing structure as claimed in claim 4, characterized in that: The height of the first sealing ring (6) is greater than the height of the second sealing ring (7), and the height of the second sealing ring (7) is greater than the height of the third sealing ring (8).

6. A battery pack waterproof sealing structure as claimed in claim 5, characterized in that: The first sealing ring (6) is located outside the second sealing ring (7), and the second sealing ring (7) is located outside the third sealing ring (8). The first sealing ring (6), the second sealing ring (7) and the third sealing ring (8) are all made of rubber.

7. A battery pack waterproof sealing structure as claimed in claim 6, characterized in that: The edge ring (9) is bonded to the bottom edge (5), and the edge ring (9) is made of ceramic material.

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