Battery explosion-proof structure and battery

Abstract

The utility model provides a battery explosion-proof structure and a battery, and relates to the technical field of batteries, and the battery explosion-proof structure comprises a shell, a current collecting piece, a sealing piece and an explosion-proof sheet, the shell is provided with an opening; the flow collecting piece is arranged at the opening and connected with the shell, and a mounting groove is defined by the flow collecting piece; the sealing piece is arranged in the mounting groove, and the sealing piece is arranged between the flow collecting piece and the shell; the anti-explosion piece is clamped in the mounting groove, part of the anti-explosion piece can abut against the position between the current collecting piece and the sealing piece, and the anti-explosion piece is provided with an anti-explosion part. According to the utility model, the shell and the current collecting piece define the mounting groove for mounting the explosion-proof sheet, and the position of the mounting groove is sealed through the sealing piece, so that the shell forms a sealing structure, the situation that the explosion-proof sheet is loosened after being mounted is reduced, and when the pressure in the shell is increased, a preset explosion threshold value of the explosion-proof sheet is reached; and therefore, the explosion-proof part of the explosion-proof sheet is deformed and a pressure relief channel is formed for pressure relief, and the situation of explosion caused by excessive pressure of the shell is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery explosion-proof structure and a battery. Background Art

[0002] In lithium-ion battery products, overpressure or short circuit in the battery will generate gas, causing the internal pressure to increase. When the internal pressure of the battery exceeds the threshold, it is easy to expand or explode. The explosion-proof plate is set in the battery to protect the battery from abnormal conditions such as expansion or explosion. If the installation position of the explosion-proof plate is not tight enough, the explosion-proof plate may become loose and fall off, thus affecting the explosion-proof performance of the battery product. Utility Model Content

[0003] The utility model aims to provide a battery explosion-proof structure and a battery, wherein a shell and a current collector define an installation groove for fixing an explosion-proof plate, and the installation groove position is sealed by a sealing member, so that the shell constitutes a sealing structure, thereby reducing the loosening and falling off of the explosion-proof plate after installation, and improving the safety performance of the battery explosion-proof structure.

[0004] A first aspect of the utility model provides a battery explosion-proof structure, which comprises a shell, a current collecting member, a sealing member and an explosion-proof sheet.

[0005] A shell having an opening;

[0006] A current collecting member, which is disposed at the opening and connected to the housing to define a mounting groove;

[0007] A sealing member, wherein the sealing member is disposed in the mounting groove and between the current collecting member and the housing;

[0008] An explosion-proof piece is clamped in the mounting groove, and a part of the explosion-proof piece can abut between the current collecting member and the sealing member, and the explosion-proof piece is provided with an explosion-proof portion.

[0009] In a possible embodiment of the present invention, one end of the shell is bent to form a first bent portion, and the first bent portion and the current collecting member jointly define the installation groove.

[0010] In a possible embodiment of the present invention, the outer peripheral side of the current collecting member extends to form a second bent portion, so that the current collecting member forms a groove, and the explosion-proof plate is installed in the groove.

[0011] In a possible embodiment of the present invention, the second bent portion abuts against a side wall of the shell.

[0012] In a possible embodiment of the present invention, the explosion-proof disk is a disc-shaped structure.

[0013] In a possible embodiment of the present invention, the explosion-proof portion includes a first blasting notch and a second blasting notch, and the first blasting notch does not intersect with the second blasting notch.

[0014] In a possible embodiment of the present invention, there are multiple first blasting grooves, and the multiple first blasting grooves can intersect at an intersection.

[0015] In a possible embodiment of the present invention, the intersection is located at the center of the explosion-proof disk.

[0016] In a possible embodiment of the present invention, the second blasting groove is an annular structure or a frame structure, and the second blasting groove is arranged around the circumference of the first blasting groove.

[0017] A second aspect of the present invention provides a battery, comprising the battery explosion-proof structure described in any one of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a battery explosion-proof structure and a battery, wherein the shell and the current collecting member define an installation groove for limiting the explosion-proof plate, thereby reducing the loosening of the explosion-proof plate, and the installation groove position is sealed by a sealing member, so that the shell constitutes a sealing structure, thereby reducing the loosening and falling off of the explosion-proof plate after installation, and the explosion-proof plate is provided with an explosion-proof part. When the pressure in the shell increases, the preset explosion threshold of the explosion-proof plate is reached, thereby causing the explosion-proof part of the explosion-proof plate to deform and form a pressure relief channel for pressure relief, thereby avoiding the explosion caused by excessive pressure in the shell, thereby achieving the purpose of reducing the pressure in the shell and improving the safety performance of the battery explosion-proof structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a battery explosion-proof structure of a battery provided in some embodiments of the present utility model;

[0021] Figure 2 Shows Figure 1 Schematic diagram of the local structure of the middle A part;

[0022] Figure 3Schematic diagram of the structure of the explosion-proof sheet of the battery explosion-proof structure provided in some embodiments of the utility model Figure 1 ;

[0023] Figure 4 Schematic diagram of the structure of the explosion-proof sheet of the battery explosion-proof structure provided in some embodiments of the utility model Figure 2 .

[0024] Description of main component symbols;

[0025] 100-battery explosion-proof structure; 110-housing; 111-opening; 112-mounting groove; 113-first bending portion; 120-current collecting member; 121-second bending portion; 122-groove; 130-sealing member; 140-explosion-proof plate; 141-first blasting groove; 142-second blasting groove; 143-intersection; 200-battery. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected 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.

[0032] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] Example 1

[0034] refer to Figure 1 As shown, an embodiment of the present application provides a battery explosion-proof structure 100 , which includes a housing 110 , a current collector 120 , a sealing member 130 and an explosion-proof sheet 140 .

[0035] Specifically, combined Figure 1 and Figure 2As shown, the shell 110 is provided with an opening 111; the current collecting member 120 is arranged at the opening 111, and is connected to the shell 110 and defines a mounting groove 112; the sealing member 130 is arranged in the mounting groove 112, and the sealing member 130 is arranged between the current collecting member 120 and the shell 110; the explosion-proof disc 140 is clamped in the mounting groove 112, and a part of the explosion-proof disc 140 can abut between the current collecting member 120 and the sealing member 130, the explosion-proof disc 140 is provided with an explosion-proof portion, and the shell 110 and the current collecting member 120 define a mounting groove 112. The groove 112 is used to limit the explosion-proof plate 140, reduce the loosening of the explosion-proof plate 140, and seal the installation groove 112 position through the seal 130, so that the shell 110 constitutes a sealing structure, and reduces the loosening and falling off of the explosion-proof plate 140 after installation. The explosion-proof plate 140 is provided with an explosion-proof part. When the pressure in the shell 110 increases, the preset explosion threshold of the explosion-proof plate 140 is reached, and then the explosion-proof part of the explosion-proof plate 140 is deformed and a pressure relief channel is formed for pressure relief, so as to avoid the shell 110 from exploding due to excessive pressure, thereby achieving the purpose of reducing the pressure in the shell 110.

[0036] It is understandable that the main function of the current collector 120 is to serve as a conduction path for current inside the battery 200, and is usually used to connect the positive and negative electrode materials with the external circuit. It helps reduce the internal resistance of the battery 200 and improve the current conduction efficiency. The explosion-proof plate 140 is an important component in the safety design of the battery 200. Its main function is to provide a safe pressure relief channel to prevent the battery 200 from exploding when the internal pressure of the battery 200 increases abnormally. When gas accumulates inside the battery 200 due to overheating, short circuit or other abnormal conditions, and the pressure reaches a predetermined threshold, the explosion-proof plate 140 will rupture or deform, releasing the internal pressure, which may be accompanied by a small amount of electrolyte overflow, but this can avoid serious damage to the structure of the battery 200 and more dangerous explosion accidents.

[0037] In one embodiment, optionally, reference Figure 1 and Figure 2 As shown, one end of the shell 110 is bent to form a first bent portion 113 , and the first bent portion 113 and the current collecting member 120 together define the installation slot 112 , so that the explosion-proof disc 140 can be inserted into the installation slot 112 .

[0038] Alternatively, if Figure 2 As shown, the outer peripheral side of the current collecting piece 120 extends to form a second bent portion 121, so that the current collecting piece 120 forms a groove 122, and the explosion-proof piece 140 is installed in the groove 122. Accordingly, the second bent portion 121 forms the groove wall of the groove 122, and the explosion-proof piece 140 can be installed in the groove 122 so that the explosion-proof piece 140 abuts against the current collecting piece 120.

[0039] In one embodiment, optionally, Figure 3 As shown, the explosion-proof disc 140 is a disc-shaped structure, so that the explosion-proof disc 140 is closed at one end of the shell 110 to match the shape structure of the current collecting piece 120 and the shell 110. The explosion-proof disc 140 can protect the safety of equipment and personnel by rupturing itself at a critical moment.

[0040] In one embodiment, optionally, in combination Figure 3 and Figure 4 As shown, the explosion-proof part includes a first blasting groove 141 and a second blasting groove 142, and the first blasting groove 141 does not intersect with the second blasting groove 142. When the pressure in the shell 110 is too large, it can rupture through the first blasting groove 141 and / or the second blasting groove 142, so as to make the gas in the shell 110 escape more quickly, reduce the pressure in the shell 110, ensure the safety performance of the battery 200, and rupture along the traces of the first blasting groove 141 and / or the second blasting groove 142 at the same time, reduce the situation that the explosion-proof piece 140 directly detaches and flies out, causing damage to the staff and equipment.

[0041] Optionally, there are multiple first blasting grooves 141 , and the multiple first blasting grooves 141 can intersect at an intersection 143 .

[0042] Optionally, refer to Figure 3 and Figure 4 As shown, the intersection point 143 is located at the center of the explosion-proof disk 140 .

[0043] Alternatively, if Figure 4 As shown, the second blasting groove 142 is an annular structure or a frame structure, and the second blasting groove 142 is arranged around the circumference of the first blasting groove 141. The second blasting groove 142 can be an annular structure, or the second blasting groove 142 can be a frame structure.

[0044] In summary, the shell 110 and the current collecting member 120 of the battery explosion-proof structure 100 define an installation groove 112 for limiting the explosion-proof plate 140, reducing the loosening of the explosion-proof plate 140, and sealing the installation groove 112 position through the sealing member 130, so that the shell 110 constitutes a sealing structure, reducing the loosening and falling off of the explosion-proof plate 140 after installation. The explosion-proof plate 140 is provided with an explosion-proof part. When the pressure in the shell 110 increases, the preset explosion threshold of the explosion-proof plate 140 is reached, and then the explosion-proof part of the explosion-proof plate 140 is deformed and a pressure relief channel is formed for pressure relief, thereby avoiding the situation where the shell 110 is over-pressured and explodes, thereby achieving the purpose of reducing the pressure in the shell 110 and improving the safety performance of the battery explosion-proof structure 100.

[0045] Example 2

[0046] refer to Figure 1 As shown, an embodiment of the present application provides another explosion-proof structure of a battery 100 , which includes a housing 110 , a current collector 120 , a sealing member 130 and an explosion-proof disk 140 .

[0047] Specifically, combined Figure 1 and Figure 2 As shown, the shell 110 is provided with an opening 111; the current collecting member 120 is arranged at the opening 111, and is connected to the shell 110 and defines a mounting groove 112; the sealing member 130 is arranged in the mounting groove 112, and the sealing member 130 is arranged between the current collecting member 120 and the shell 110; the explosion-proof disc 140 is clamped in the mounting groove 112, and part of the explosion-proof disc 140 can abut between the current collecting member 120 and the sealing member 130, thereby reducing the loosening of the explosion-proof disc 140, and the mounting groove 112 is sealed by the sealing member 130, so that the shell 110 constitutes a sealing structure, thereby reducing the loosening and falling off of the explosion-proof disc 140 after installation.

[0048] In this embodiment, the explosion-proof piece 140 is provided with an explosion-proof part, and the shell 110 and the current collecting member 120 define a mounting groove 112 for limiting the explosion-proof piece 140. When the pressure in the shell 110 increases, the preset explosion threshold of the explosion-proof piece 140 is reached, and the explosion-proof part of the explosion-proof piece 140 is deformed and a pressure relief channel is formed for pressure relief, thereby avoiding the situation where the shell 110 is over-pressured and explodes, thereby achieving the purpose of reducing the pressure in the shell 110.

[0049] In one embodiment, optionally, reference Figure 1 and Figure 2 As shown, one end of the housing 110 is bent to form a first bent portion 113, and the first bent portion 113 and the current collector 120 together define the installation slot 112, so that the explosion-proof disk 140 can be inserted into the installation slot 112. Exemplarily, the first bent portion 113 is bent toward the current collector 120.

[0050] Alternatively, if Figure 2 As shown, the outer peripheral side of the current collecting member 120 extends to form a second bent portion 121, so that the current collecting member 120 forms a groove 122, and the explosion-proof disc 140 is installed in the groove 122. Accordingly, the second bent portion 121 forms a groove wall of the groove 122, and the explosion-proof disc 140 can be installed in the groove 122, so that the explosion-proof disc 140 abuts against the current collecting member 120. Exemplarily, the second bent portion is a circular ring structure.

[0051] Furthermore, the second bent portion 121 abuts against the side wall of the shell 110, that is, the second bent portion 121 of the current collecting piece 120 abuts against the side wall of the shell 110, so as to fix and limit the current collecting piece 120, reduce the gap between the current collecting piece 120 and the shell 110, and have better sealing.

[0052] In one embodiment, optionally, Figure 3 As shown, the explosion-proof disc 140 is a disc-shaped structure, so that the explosion-proof disc 140 is closed at one end of the shell 110 to match the shape structure of the current collecting piece 120 and the shell 110. Demonstratively, the explosion-proof disc 140 can also be made of a composite material with coating technology to enhance its corrosion resistance, fatigue resistance and temperature adaptability. The explosion-proof disc 140 with a disc-shaped structure can protect the safety of equipment and personnel by rupturing itself at a critical moment through its structural design and material selection.

[0053] In one embodiment, optionally, in combination Figure 3 and Figure 4 As shown, the explosion-proof part includes a first blasting groove 141 and a second blasting groove 142, and the first blasting groove 141 does not intersect with the second blasting groove 142. When the pressure in the shell 110 is too large, it can rupture through the first blasting groove 141 and / or the second blasting groove 142, so as to make the gas in the shell 110 escape more quickly, reduce the pressure in the shell 110, ensure the safety performance of the battery 200, and rupture along the traces of the first blasting groove 141 and / or the second blasting groove 142 at the same time. In other words, it can rupture along the first blasting groove 141, or along the traces of the second blasting groove 142, or along the traces of the first blasting groove 141 and the second blasting groove 142, so as to reduce the situation where the explosion-proof piece 140 directly detaches and flies out, causing damage to the staff and equipment.

[0054] Optionally, there are multiple first blasting notches 141 , and the multiple first blasting notches 141 can intersect at an intersection 143 . Furthermore, two adjacent first blasting notches 141 are arranged at an angle, and the multiple first blasting notches 141 can improve the explosion-proof performance of the explosion-proof plate 140 .

[0055] Optionally, refer to Figure 3 and Figure 4As shown, the intersection 143 is located at the center of the explosion-proof plate 140. Exemplarily, the number of the first blasting grooves 141 can be two, three or four. When the number of the first blasting grooves 141 is three, the angle between two adjacent first blasting grooves 141 is 120°, and the three first blasting grooves 141 form a "human" shape structure; when the number of the first blasting grooves 141 is four, the angle between two adjacent first blasting grooves 141 is 90°, and the four first blasting grooves 141 form a "cross" shape structure; the number of the first blasting grooves 141 can also be greater than four, which will not be described in detail here.

[0056] Alternatively, if Figure 4 As shown, the second blasting groove 142 is an annular structure or a frame structure, and the second blasting groove 142 is arranged around the circumference of the first blasting groove 141. Accordingly, the second blasting groove 142 can be an annular structure or a frame structure that is not connected at the beginning and the end, that is, the annular structure or the frame structure is provided with a gap to reduce the flying of fragments of the explosion-proof plate 140 when the second blasting groove 142 is broken. The second blasting groove 142 can be a circular ring structure, or the second blasting groove 142 can be a frame structure.

[0057] Example 3

[0058] The embodiment of the utility model further provides a battery 200, including the battery explosion-proof structure 100 in embodiment 1 or embodiment 2. The steering column guard of the vehicle can be installed with the battery explosion-proof structure 100, and the vehicle has all the beneficial effects of the battery explosion-proof structure 100, which will not be described in detail here.

[0059] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A battery explosion-proof structure, characterized in that: include: A shell having an opening; A current collecting member, which is disposed at the opening and connected to the housing to define a mounting groove; A sealing member, wherein the sealing member is disposed in the mounting groove and between the current collecting member and the housing; An explosion-proof piece is clamped in the mounting groove, and a part of the explosion-proof piece can abut between the current collecting member and the sealing member, and the explosion-proof piece is provided with an explosion-proof portion.

2. The battery explosion-proof structure according to claim 1, characterized in that: One end of the shell is bent to form a first bent portion, and the first bent portion and the current collecting member together define the installation groove.

3. The battery explosion-proof structure according to claim 2, characterized in that: The outer peripheral side of the current collecting member extends to form a second bending portion, so that the current collecting member forms a groove, and the explosion-proof plate is installed in the groove.

4. The battery explosion-proof structure according to claim 3, characterized in that: The second bending portion abuts against a side wall of the housing.

5. The battery explosion-proof structure according to claim 1, characterized in that: The explosion-proof disk is a disc-shaped structure.

6. The battery explosion-proof structure according to any one of claims 1 to 5, characterized in that: The explosion-proof portion includes a first blasting notch and a second blasting notch, wherein the first blasting notch does not intersect with the second blasting notch.

7. The battery explosion-proof structure according to claim 6, characterized in that: There are multiple first blasting grooves, and the multiple first blasting grooves can intersect at an intersection.

8. The battery explosion-proof structure according to claim 7, characterized in that: The intersection point is located at the center of the bursting disk.

9. The battery explosion-proof structure according to claim 6, characterized in that: The second blasting groove is a ring-shaped structure or a frame-shaped structure, and the second blasting groove is arranged around the circumference of the first blasting groove.

10. A battery, characterized in that: The battery explosion-proof structure comprises the battery explosion-proof structure according to any one of claims 1 to 9.

Images