Battery explosion-proof structure and battery

Abstract

This utility model provides a battery explosion-proof structure, including a shell, a core, and a cover plate. The shell includes an upper shell and a lower shell, with the core disposed inside the lower shell. The cover plate covers the top of the upper shell. The upper shell has an arc-shaped groove on its peripheral sidewall, the lower end of which connects to the lower shell, and explosion-proof grooves are formed along the circumference of the groove on the outer surface of the connection point. A battery is also provided, including the above-mentioned explosion-proof structure, and further including a current collector and an insulating sheet. The current collector is connected to the top tab of the core, and the insulating sheet has a skirt bent downwards on its periphery, which fits the sidewall of the current collector. The current collector is connected to an extension handle, which passes through the insulating sheet and connects to the cover plate. The arc-shaped groove can concentrate the pressure generated by battery failure to the explosion-proof grooves, making the explosion-proof grooves easier to crack, thereby quickly breaking open the upper shell, ensuring the pressure relief area, achieving rapid and effective pressure relief, and ensuring the safety performance of the battery.

Description

Technical Field

[0001] This utility model relates to the field of battery explosion-proof technology, and in particular to a battery explosion-proof structure and battery. Background Technology

[0002] With the development of technology, more and more devices and tools are using batteries as an energy source. However, there are some safety issues during battery use, including battery overheating, battery leakage, battery short circuits, and battery overcharging. These problems may lead to serious consequences such as explosions, threatening personal safety and property security.

[0003] Traditional cylindrical batteries typically have their explosion-proof valves located at the top or bottom. During thermal runaway, the core may not effectively contact the valve, or the pressure relief area may be too small, resulting in ineffective pressure relief. Therefore, it is necessary to propose a battery explosion-proof structure and battery design to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a battery explosion-proof structure and battery to solve the problem mentioned in the background art that the explosion-proof valve of traditional cylindrical batteries is mostly located at the top or bottom, and the core and explosion-proof valve are not effectively attached or the pressure relief area is small during thermal runaway, resulting in ineffective pressure relief.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A battery explosion-proof structure, comprising:

[0007] The housing includes an upper housing and a lower housing;

[0008] The core is located inside the lower housing.

[0009] The cover plate, which closes to the top of the upper housing;

[0010] The upper shell has an arc-shaped groove on its peripheral sidewall. The lower end of the arc-shaped groove is connected to the top of the lower shell, and explosion-proof grooves are provided on the outer surface of the connection along the circumference of the arc-shaped groove.

[0011] Preferably, the cross-section of the explosion-proof groove is square or triangular.

[0012] Preferably, the depth of the explosion-proof groove is greater than two-thirds of the thickness of the shell.

[0013] Preferably, the width of the explosion-proof groove is 0.3~1.0mm.

[0014] Preferably, the top of the upper housing is provided with a locking part, and the cover plate is locked into the locking part.

[0015] A battery comprising the battery explosion-proof structure described in any of the above claims.

[0016] Preferably, it further includes:

[0017] The collector plate is connected to the top tab of the winding core;

[0018] An insulating sheet has a skirt bent downwards on its periphery, and the skirt is adapted to the side wall of the current collector.

[0019] The collector plate is connected to an extension handle, which passes through the insulating sheet and connects to the cover plate.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: the side wall of the upper shell is made into an arc-shaped groove, and explosion-proof grooves are opened circumferentially at the connection between the upper shell and the lower shell. The arc-shaped groove can concentrate the pressure generated by battery failure to the explosion-proof grooves, making the explosion-proof grooves easy to crack, thereby quickly breaking open the upper shell, ensuring the pressure relief area, and achieving the purpose of rapid and effective pressure relief. The use of this battery explosion-proof structure can ensure the safety performance of the battery and avoid causing serious consequences from an explosion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the structure after the explosion-proof groove cracks in an embodiment of this utility model;

[0024] Figure 3 This is a top view of an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the explosion-proof groove cross-section in the embodiment of this utility model.

[0026] Reference numerals: 10, housing; 101, upper housing; 1011, arc-shaped groove; 1012, engaging part; 102, lower housing; 20, core; 30, cover plate; 40, explosion-proof groove; 50, collector plate; 60, insulating sheet; 70, extension handle. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "depth", "thickness", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figures 1-3As shown, this utility model embodiment provides a battery explosion-proof structure, including a housing 10, a core 20, and a cover plate 30. The housing 10 includes an upper housing 101 and a lower housing 102. The core 20 is disposed inside the lower housing 102, and the cover plate 30 covers the top of the upper housing 101. The peripheral sidewall of the upper housing 101 is an arc-shaped groove 1011. The lower end of the arc-shaped groove 1011 is connected to the lower housing 102, and an explosion-proof groove 40 is provided on the outer surface of the connection along the circumference of the arc-shaped groove 1011.

[0033] The sidewall of the upper housing 101 is made into an arc-shaped groove 1011, and an explosion-proof groove 40 is opened circumferentially at the connection between the upper housing 101 and the lower housing 102. The arc-shaped groove 1011 can concentrate the pressure generated by the battery failure to the explosion-proof groove 40, making the explosion-proof groove 40 easy to crack, thereby quickly breaking open the upper housing 101, ensuring the pressure relief area, and achieving the purpose of rapid and effective pressure relief.

[0034] Specifically, such as Figure 1 As shown in Figure 4, the cross-section of the explosion-proof groove 40 is square or triangular. The explosion-proof groove 40 with a square cross-section is easier to process, while the explosion-proof groove 40 with a triangular cross-section has a more precise valve opening position.

[0035] To ensure that the explosion-proof notch 40 cracks before the housing 10, thus preventing the housing 10 from exploding and effectively relieving pressure, the depth of the explosion-proof notch 40 is greater than two-thirds of the thickness of the housing 10.

[0036] In addition, the width of the explosion-proof groove 40 is 0.3~1.0mm, which can be changed as needed to adapt to the requirements of different battery cases and enhance structural versatility.

[0037] Furthermore, the top of the upper housing 101 is provided with a locking part 1012, and the cover plate 30 is locked in the locking part 1012.

[0038] This utility model embodiment also provides a battery, including the battery explosion-proof structure described in any of the above embodiments.

[0039] The battery also includes a current collector 50 and an insulating sheet 60. The current collector 50 is connected to the top tab of the core 20; the insulating sheet 60 has a skirt bent downward around its periphery, which is adapted to the side wall of the current collector 50; the current collector 50 is connected to an extension handle 70, which passes through the insulating sheet 60 and is connected to the cover plate 30.

[0040] Specifically, the insulating sheet 60 passes through the extension handle 70 and is fastened to the upper part of the current collector 50, and its peripheral skirt covers the side wall of the current collector 50, so that the current collector 50, the insulating sheet 60 and the extension handle 70 can effectively isolate the core 20 tabs and the housing 10 while transmitting current, ensuring the safety performance of the battery.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery explosion-proof structure, characterized in that, include: The housing (10) includes an upper housing (101) and a lower housing (102). The core (20) is disposed inside the lower housing (102); The cover plate (30) covers the top of the upper housing (101); The upper shell (101) has an arc-shaped groove (1011) on its peripheral sidewall. The lower end of the arc-shaped groove (1011) is connected to the top of the lower shell (102), and explosion-proof grooves (40) are provided on the outer surface of the connection along the circumference of the arc-shaped groove (1011).

2. The battery explosion-proof structure according to claim 1, characterized in that: The cross-section of the explosion-proof notch (40) is square or triangular.

3. The battery explosion-proof structure according to claim 1, characterized in that: The depth of the explosion-proof groove (40) is greater than two-thirds of the thickness of the shell (10).

4. The battery explosion-proof structure according to claim 1, characterized in that: The width of the explosion-proof groove (40) is 0.3~1.0mm.

5. The battery explosion-proof structure according to claim 1, characterized in that: The upper housing (101) has a locking part (1012) at the top, and the cover plate (30) is locked in the locking part (1012).

6. A battery, characterized in that, Includes the battery explosion-proof structure as described in any one of claims 1 to 5.

7. The battery according to claim 6, characterized in that, Also includes: The collector plate (50) is connected to the top tab of the winding core (20); An insulating sheet (60) has a skirt bent downwards on its periphery, and the skirt is adapted to the side wall of the current collector (50); The collector plate (50) is connected to an extension handle (70), which passes through the insulating sheet (60) and is connected to the cover plate (30).

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