A container with explosion guiding and power battery

Abstract

The utility model relates to battery pressure relief technical field, concretely relates to a container and power battery with blasting direction, and the container includes: container body, and the wall thickness of container body is pressed and has embedded pressure relief structure, its characterized in be still equipped with the angle expansion guide structure for increasing the angle between embedded pressure relief structure and container body when embedded pressure relief structure explodes on the wall thickness of container body, and the angle expansion guide structure is arranged on the inner surface and / or outer surface of container body. In the utility model, the opening angle between the embedded pressure relief structure and the container body is increased by setting the angle expansion guide structure, so that the side spray when the embedded pressure relief structure is opened is changed to direct injection, and the safety of the battery is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of battery pressure relief technology, specifically to a container with explosion guidance and a power battery. Background Technology

[0002] When the internal pressure of a battery rises sharply due to abnormal conditions such as overcharging or short circuits, an effective pressure relief and explosion-proof structure can release the internal pressure in time, preventing the casing from rupturing or even exploding. Traditional battery casing pressure relief methods mostly rely on setting grooves on the casing surface. However, current embedded grooves do not have a guiding function during explosion. Because the pressure relief direction is uncontrollable, when the explosion-proof valve opens, the gas pressure inside the casing, along with electrolyte, may spray sideways onto surrounding batteries, causing contamination and posing a safety hazard.

[0003] How to achieve precise guidance of the embedded groove pressure relief direction to improve the safety and stability of the pressure relief process has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a container with explosion guidance and a power battery, which aims to solve the above-mentioned technical problems.

[0005] This utility model discloses a container with a burst guide, comprising a container body and an embedded pressure relief structure pressed into the wall thickness of the container body. The wall thickness of the container body is also provided with an angle-expanding guide structure for increasing the angle between the embedded pressure relief structure and the container body when the embedded pressure relief structure bursts. The angle-expanding guide structure is provided on the inner surface and / or outer surface of the container body.

[0006] Preferably, the angle-enlarging guide structure is any one or a combination of two of the following: a strip groove structure and a concave line structure formed by several concave points.

[0007] Preferably, the angle-enlarging guide structure includes at least one guide groove that forms a thickness reduction portion on the wall thickness of the container body; when the embedded pressure relief structure bursts, the thickness reduction portion increases the angle between the embedded pressure relief structure and the container body.

[0008] Preferably, the guide groove is provided on the inner surface of the container body, and the embedded pressure relief structure is provided on the outer surface of the container body.

[0009] Preferably, the guide groove is provided on the outer surface of the container body, and the embedded pressure relief structure is provided on the inner surface of the container body.

[0010] Preferably, the inner and outer surfaces of the container body are respectively provided with guide grooves that are distributed in a corresponding manner, and the embedded pressure relief structure is provided on the inner or outer surface of the container body.

[0011] Preferably, the width of the guide groove from the groove opening to the groove bottom is equal or unequal; the guide groove is either a straight groove or a curved groove.

[0012] Preferably, the embedded pressure relief structure includes at least one weak area molding strip embedded in the wall thickness of the container body, and a groove formed by the weak area molding strip; the weak area molding strip has a curved structure, and the container body is provided with the angle-enlarging guide structure located on at least one side of the weak area molding strip.

[0013] Preferably, the container body includes a shell and an end cap that closes the opening of the shell, and the embedded pressure relief structure is provided on the shell and / or the end cap, each of the embedded pressure relief structures corresponding to at least one angle-enlarging guide structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When the internal pressure of the container reaches the burst threshold, the deformation of the embedded pressure relief structure during bursting is very small. This causes the opening between the embedded pressure relief structure and the container to face to the side, resulting in the gas pressure inside the container, along with electrolyte, being sprayed outwards, posing a pollution and safety hazard. This application addresses this by setting an angle-enhanced guide structure, increasing the opening angle between the embedded pressure relief structure and the container, thus changing the side spray during bursting from a side spray to a direct spray, enhancing battery safety.

[0015] On the other hand, one power battery of this utility model includes a container with an explosion guide.

[0016] It is understood that the power battery of this application has the same beneficial effects as a container with explosion guidance, which will not be elaborated here. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A three-dimensional structural diagram of a container with a burst guide provided for an embodiment of this utility model; Figure 2Schematic diagram of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model Figure 1 ; Figure 3 Schematic diagram of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model Figure 2 ; Figure 4 Schematic diagram of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model Figure 3 ; Figure 5 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 1 ; Figure 6 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 2 ; Figure 7 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 3 ; Figure 8 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 4 ; Figure 9 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 5 ; Figure 10 Cross-sectional view of the embedded pressure relief structure and angle-enlarging guide structure provided in the embodiments of this utility model. Figure 6 ; Figure 11 A schematic cross-sectional view of the angle-enlarging guide structure provided in an embodiment of this utility model; Figure 12 A schematic diagram of the surface shape of the angle-enlarging guide structure provided in an embodiment of this utility model.

[0018] In the figure: 1. Container body; 11. Shell; 12. End cap; 2. Embedded pressure relief structure; 3. Angle expansion guide structure; 31. Thickening part; 32. Guide groove. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Example 1, combined with Figure 1 As shown, this embodiment provides a container with a burst guide, including a container body 1 and an embedded pressure relief structure 2 embedded in the wall thickness of the container body 1. The wall thickness of the container body 1 is also provided with an angle widening guide structure 3 for increasing the angle between the embedded pressure relief structure 2 and the container body 1 when the embedded pressure relief structure 2 bursts. The angle widening guide structure 3 is provided on the inner surface and / or outer surface of the container body 1.

[0024] Specifically, the angle-enlarging guide structure 3 can be arranged on the inner surface of the container body 1, or on the outer surface, or distributed on both the inner and outer surfaces to meet different usage requirements.

[0025] Specifically, the container body 1 has an embedded pressure relief structure 2 pressed into its wall thickness and an angle-expanding guide structure 3, which is used to increase the angle between the embedded pressure relief structure 2 and the container body 1 when the embedded pressure relief structure 2 bursts, thereby optimizing the pressure relief effect when the internal pressure rises sharply, making the pressure relief smoother and more controllable, and reducing the impact on surrounding components and the environment.

[0026] Specifically, when the pressure inside the container body 1 rises sharply to the burst threshold of the embedded pressure relief structure 2, the embedded pressure relief structure 2 will rupture, forming an opening between itself and the container body 1. Due to the small initial deformation and small opening angle, the gas pressure inside the container body 1, along with the electrolyte, will spray sideways to the surrounding area. At this time, the angle widening guide structure 3 guides and widens the angle between the embedded pressure relief structure 2 and the container body 1, thereby widening the pressure relief port and changing the side spray of the gas pressure inside the container body 1 to a direct spray, promoting rapid pressure release.

[0027] This embodiment achieves safe pressure relief through the embedded pressure relief structure 2, and simultaneously controls the pressure relief process through a guiding structure, thus effectively controlling the internal pressure. In emergency situations of increased pressure, it can relieve pressure promptly and safely, preventing dangerous situations such as container explosions due to excessive pressure, improving the safety and efficiency of pressure relief, and ensuring safe use.

[0028] Preferably, the angle-enlarging guide structure 3 is any one or a combination of two of the following: a strip groove structure and a concave line structure formed by several concave points.

[0029] Specifically, the strip groove structure provides a preset deformation space when the embedded pressure relief structure 2 ruptures. The groove's orientation guides the pressure relief port between the embedded pressure relief structure 2 and the container body 1 to expand in a specific direction, thereby increasing the opening angle of the pressure relief port. The concave line structure forms weak lines on the surface of the container body 1 through several concave points. When the embedded pressure relief structure 2 bursts, the material strength at the concave points is lower, causing preferential deformation, thus further expanding the opening angle of the pressure relief port. The angle-expanding guide structure 3, through the combined design of the strip groove and concave line, achieves refined control of the pressure relief process, improving pressure relief efficiency and safety.

[0030] Preferably, the angle-enlarging guide structure 3 includes at least one guide groove 32 that forms a thickness reduction portion 31 on the wall thickness of the container body 1; when the embedded pressure relief structure 2 bursts, the thickness reduction portion 31 increases the angle between the embedded pressure relief structure 2 and the container body 1.

[0031] Specifically, the guide groove 32 forms a thickness reduction section 31 on the wall thickness of the container body 1. The thickness reduction section 31 reduces the structural strength of its area, making it a stress concentration point during explosion. This guides the container body 1 to deform or fracture in a specific direction, thereby increasing the opening angle of the pressure relief port between the embedded pressure relief structure 2 and the container body 1. When the embedded pressure relief structure 2 explodes, the thickness reduction section 31, as a weak point, responds preferentially due to its lower strength. Through deformation or fracture, it increases the opening angle of the pressure relief port between the embedded pressure relief structure 2 and the container body 1, guiding the pressure relief direction and ensuring orderly pressure release. This effectively avoids the disorderly rupture and secondary damage caused by side spray that may occur during traditional container pressure relief.

[0032] Specifically, the guide groove 32 and the embedded pressure relief structure 2 include the following specific configuration schemes: Option 1: Combining Figure 2 , Figure 7 As shown, a guide groove 32 is provided on the inner surface of the container body 1, and an embedded pressure relief structure 2 is provided on the outer surface of the container body 1. A thickness reduction portion 31 is formed between the bottom of the guide groove 32 and the outer surface of the container body 1. Figure 7 A cross-sectional view of a guide groove 32 provided on the inner surface of the container body 1 and an embedded pressure relief structure 2 provided on the outer surface of the container body 1.

[0033] Option 2: Combining Figure 3 , Figure 8 As shown, a guide groove 32 is provided on the outer surface of the container body 1, and an embedded pressure relief structure 2 is provided on the inner surface of the container body 1. A thickened portion 31 is formed between the bottom of the guide groove 32 and the inner surface of the container body 1. Figure 8 A cross-sectional view of a guide groove 32 provided on the outer surface of the container body 1 and an embedded pressure relief structure 2 provided on the inner surface of the container body 1.

[0034] Option 3: Combining Figure 4 , Figure 9 , Figure 10 As shown, the guide groove 32 and the embedded pressure relief structure 2 are uniformly disposed on one of the inner and outer surfaces of the container body 1. In this case, a reduced thickness portion 31 is formed between the bottom of the guide groove 32 and the remaining inner or outer surface of the container body 1. Figure 9 A cross-sectional view showing that the guide groove 32 and the embedded pressure relief structure 2 are uniformly provided on the inner surface of the container body 1; Figure 10 A cross-sectional view showing that the guide groove 32 and the embedded pressure relief structure 2 are uniformly provided on the outer surface of the container body 1.

[0035] Option 4: Combining Figure 5 , Figure 6 As shown, guide grooves 32 are provided on the inner and outer surfaces of the container body 1, respectively, in a corresponding inner and outer distribution. An embedded pressure relief structure 2 is provided on either the inner or outer surface of the container body 1. A reduced thickness portion 31 is formed between the bottom of the inner surface guide groove 32 and the bottom of the outer surface guide groove 32. Figure 5 A cross-sectional view of a container body 1 with guide grooves 32 distributed in a corresponding manner on the inner and outer surfaces, and an embedded pressure relief structure 2 located on the outer surface of the container body 1. Figure 6 A cross-sectional view showing that the container body 1 has guide grooves 32 distributed in a corresponding manner on its inner and outer surfaces, and the embedded pressure relief structure 2 is located on the inner surface of the container body 1.

[0036] Preferred, such as Figure 11 As shown, the guide groove 32 has a width that is equal or unequal from its opening to its bottom, and the bottom of the guide groove 32 can be planar or non-planar. For example, the cross-sectional shape of the guide groove 32 is... Figure 11 The first section from left to right in the first row is a rectangle, the second section from left to right in the first row is a U-shaped section, the first section from left to right in the second row is an irregular inverted trapezoidal section, the second section from left to right in the second row is an irregular U-shaped section, the first section from left to right in the third row is an inverted trapezoidal section, and the second section from left to right in the third row is an inverted trapezoidal section with an arc-shaped bottom.

[0037] Specifically, the opening angle control of the pressure relief port between the embedded pressure relief structure 2 and the container body 1 can be expanded according to the cross-sectional shape of the guide groove 32, including but not limited to the above-mentioned example shapes. This embodiment does not specifically limit this.

[0038] Preferred, such as Figure 12 As shown, the guide groove 32 can be either a straight groove or a curved groove. For example, the surface shape of the guide groove 32 is... Figure 12 The first line from left to right is a straight line, the second line from left to right is a wavy line, the first line from left to right in the second line is a broken line, and the second line from left to right in the second line is a semicircular arc.

[0039] Specifically, the pressure relief direction control of the embedded pressure relief structure 2 can be achieved by changing the surface shape of the guide groove 32, including but not limited to the shapes mentioned above. This embodiment does not specifically limit this.

[0040] Preferably, the embedded pressure relief structure 2 includes at least one weak area molding strip embedded in the wall thickness of the container body 1, and a groove obtained by the weak area molding strip; the weak area molding strip has a curved structure, and an angle-enlarging guide structure 3 is provided on the container body 1 located on at least one side of the weak area molding strip.

[0041] Specifically, the position and number of the angle-enlarging guide structure 3 can be adjusted according to the actual setting of the weak area molding insert, and this embodiment does not impose specific limitations. For example, when the weak area molding insert has an S-shaped structure, the angle-enlarging guide structure 3 can be set as two guide grooves 32, one of which is set at any one opening of the weak area molding insert, and the remaining guide groove 32 is set at the other opening of the weak area molding insert.

[0042] Specifically, the container body 1 includes a shell 11 and an end cap 12 that closes the opening of the shell 11. An embedded pressure relief structure 2 is provided on the shell 11 and / or the end cap 12, and each embedded pressure relief structure 2 corresponds to at least one angle-enlarging guide structure 3.

[0043] Example 2: A power battery, including a container with explosion guidance.

[0044] It is understood that the power battery of this application has the same beneficial effects as a container with explosion guidance, which will not be elaborated here.

[0045] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A container with a burst-guided mechanism, comprising a container body (1) and an embedded pressure relief structure (2) pressed into the wall thickness of the container body (1), characterized in that, The container body (1) is further provided with an angle-enlarging guide structure (3) on its wall thickness to increase the angle between the embedded pressure relief structure (2) and the container body (1) when the embedded pressure relief structure (2) bursts. The angle-enlarging guide structure (3) is provided on the inner surface and / or outer surface of the container body (1).

2. The container with explosive guidance according to claim 1, characterized in that, The angle-enlarging guide structure (3) is any one or a combination of two of the following: a strip groove structure and a concave line structure formed by several concave points.

3. The container with explosive guidance according to claim 1, characterized in that, The angle-enlarging guide structure (3) includes at least one guide groove (32) that forms a thickness reduction portion (31) on the wall thickness of the container body (1); when the embedded pressure relief structure (2) bursts, the thickness reduction portion (31) increases the angle between the embedded pressure relief structure (2) and the container body (1).

4. The container with explosive guidance according to claim 3, characterized in that, The guide groove (32) is provided on the inner surface of the container body (1), and the embedded pressure relief structure (2) is provided on the outer surface of the container body (1).

5. The container with explosive guidance according to claim 3, characterized in that, The guide groove (32) is provided on the outer surface of the container body (1), and the embedded pressure relief structure (2) is provided on the inner surface of the container body (1).

6. The container with explosive guidance according to claim 3, characterized in that, The inner and outer surfaces of the container body (1) are respectively provided with guide grooves (32) that are distributed in a corresponding manner, and the embedded pressure relief structure (2) is provided on the inner or outer surface of the container body (1).

7. The container with explosive guidance according to any one of claims 3-6, characterized in that, The guide groove (32) has a width that is equal or unequal from the opening to the bottom; the guide groove (32) can be either a straight groove or a curved groove.

8. The container with explosion guidance according to any one of claims 1-6, characterized in that, The embedded pressure relief structure (2) includes at least one weak area molding strip embedded in the wall thickness of the container body (1), and a groove obtained by the weak area molding strip; the weak area molding strip has a curved structure, and the container body (1) is provided with the angle-enlarging guide structure (3) located on at least one side of the weak area molding strip.

9. The container with explosive guidance according to claim 8, characterized in that, The container body (1) includes a shell (11) and an end cap (12) closed in the opening of the shell (11). The embedded pressure relief structure (2) is provided on the shell (11) and / or the end cap (12), and each embedded pressure relief structure (2) corresponds to at least one angle-enlarging guide structure (3).

10. A power battery, characterized in that, Includes a container with a burst guide as described in any one of claims 1-9.

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