Explosion-proof battery structure and battery

Abstract

To provide a battery explosion-proof structure and a battery capable of improving the safety performance of the battery explosion-proof structure by preventing a rupture disk from loosening and coming off after being attached. [Solution] The battery explosion-proof structure comprises a case 110, a bus bar member 120, a sealing member 130, and a rupture disk 140, the case has an opening 111, the bus bar member is installed in the opening and connected to the case to define a mounting groove 112, the sealing member is installed in the mounting groove and installed between the bus bar member and the case, the rupture disk is engaged with the mounting groove, and a part of the rupture disk is installed between the bus bar member and the sealing member so as to abut against the bus bar member and the sealing member, and the rupture disk is provided with an explosion-proof portion.

Description

[Technical field]

[0001] The present invention relates to the technical field of batteries, and more particularly to an explosion-proof structure for a battery and a battery. [Background technology]

[0002] In lithium-ion battery products, if overpressure or short circuit occurs inside the battery, gas is generated and the internal pressure increases. If the pressure inside the battery exceeds a threshold, it is likely to expand or explode. By installing a rupture disk in the battery, the battery is protected from abnormal events such as expansion and explosion. However, if the rupture disk is not securely connected at the installation position, the rupture disk may loosen and come off, compromising the explosion-proof performance of the battery product. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention aims to provide a battery explosion-proof structure and a battery in which a mounting groove for fixing a rupture disk is defined by a case and a bus bar member, and the mounting groove is sealed at the position by a sealing member, thereby forming the case as a sealed structure, preventing the rupture disk from loosening and coming off after being installed, and improving the safety performance of the battery explosion-proof structure. [Means for solving the problem]

[0004] A first aspect of the present invention provides an explosion-proof structure for a battery, the explosion-proof structure for a battery comprising a case, a busbar member, a sealing member, and a rupture disk, An opening is provided in the case, the bus bar member is disposed in the opening and connects with the case to define a mounting groove; the sealing member is disposed in the mounting groove and between the bus bar member and the case; The rupture disk is engaged with the mounting groove, and a portion of the rupture disk is installed between the bus bar member and the sealing member so as to abut against the bus bar member and the sealing member, and an explosion-proof portion is provided on the rupture disk.

[0005] In one embodiment of the present invention, one end of the case is bent to form a first bent portion, and the first bent portion and the bus bar member define the mounting groove.

[0006] In one embodiment of the present invention, the outer periphery of the bus bar member is extended to form a second bent portion, whereby a groove is formed by the bus bar member, and the rupture disk is mounted in the groove.

[0007] In one possible embodiment of the present invention, the second bent portion abuts against a side wall of the case.

[0008] In one possible embodiment of the present invention, the rupture disk is a disk-like structure.

[0009] In one possible embodiment of the present invention, the explosion-proof part includes a first rupture score groove and a second rupture score groove, and the first rupture score groove and the second rupture score groove do not intersect.

[0010] In one possible embodiment of the present invention, there are a plurality of the first rupture score grooves, and the plurality of the first rupture score grooves intersect at the same intersection point.

[0011] In one possible embodiment of the present invention, the intersection is located at the center position of the rupture disk.

[0012] In one possible embodiment of the present invention, the second rupture score groove is an annular or frame-like structure, and is arranged to surround the first rupture score groove.

[0013] A second aspect of the present invention provides a battery, the battery comprising the explosion-proof structure for a battery according to any one of the above embodiments. Effect of the Invention

[0014] Compared with the prior art, the present invention has the following beneficial effects. The battery explosion-proof structure and battery according to the present invention have a mounting groove for restricting the rupture disk defined by the case and the busbar member, which can prevent the rupture disk from loosening, and the sealing member seals the mounting groove position, which forms the case as a sealed structure and can prevent the rupture disk from loosening and falling off after being installed. The rupture disk is provided with an explosion-proof part. When the pressure inside the case increases to a certain pressure release threshold of the rupture disk, the explosion-proof part of the rupture disk deforms to form a pressure release passage to release the pressure, thereby preventing the explosion of the case caused by excessive pressure, achieving the purpose of reducing the pressure inside the case, and improving the safety performance of the battery explosion-proof structure. [Brief description of the drawings]

[0015] In order to more clearly describe the technical solutions of the embodiments of the present invention, the drawings used in the embodiments are briefly described below. The drawings described are only for illustrating some embodiments of the present invention, and are not intended to limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive abilities.

[0016] [Figure 1] 2 is a schematic diagram of a battery explosion-proof structure according to some embodiments of the present invention; FIG. [Diagram 2] FIG. 2 is a schematic partial configuration diagram of a portion A in FIG. [Diagram 3] FIG. 1 is a schematic diagram of a rupture disk for a battery explosion-proof structure according to some embodiments of the present invention. [Figure 4] FIG. 2 is a schematic diagram of a rupture disk for a battery explosion-proof structure according to some embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the drawings used in the embodiments of the present invention. The described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. The components in the embodiments of the present invention shown in the drawings can be arranged and designed in various arrangement ways.

[0018] Therefore, the following detailed description of the embodiments of the present invention shown in the drawings is only a selected embodiment of the present invention and does not limit the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without using their inventive abilities also belong to the protection scope of the present invention.

[0019] Like reference characters refer to like objects in the drawings, so that if a definition is made in one drawing, it does not require further definition or interpretation in the other drawings.

[0020] In the description of the present invention, the directions or positional relationships expressed by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the drawings or are the normal arrangement directions or positional relationships of the products of the present invention, and are merely for the purpose of simply and concisely describing the present invention, and do not expressly or imply that the relevant devices or elements necessarily have a specific direction, or are constructed or operated in a specific direction, and therefore do not limit the present invention. In addition, terms such as "first", "second", and "third" are merely for the purpose of distinction and description, and do not expressly or imply relative importance.

[0021] Additionally, terms such as "horizontal," "vertical," and "gravity direction" do not mean that a component is placed absolutely horizontally or vertically, but may be slightly tilted. For example, "horizontal" means that the orientation of the component is merely more horizontal than "vertical," and does not require that the component be completely horizontal, but may be slightly tilted.

[0022] In the description of the present invention, unless otherwise specified, the terms "installation", "mounting", "coupling" and "connection" should be understood in a broad sense. For example, they may be fixed connections, detachable connections, or integral connections. They may be mechanical connections or electrical connections. They may also be direct connections, indirect connections via intermediate objects, or internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0023] Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. Unless inconsistent, the following examples and features in the examples can be combined with each other.

[0024] Example 1 1, an embodiment of the present application provides a battery explosion-proof structure 100. The battery explosion-proof structure 100 includes a case 110, a bus bar member 120, a sealing member 130, and a rupture disk 140.

[0025] 1 and 2 , an opening 111 is provided in the case 110. The bus bar member 120 is installed in the opening 111 and is connected to the case 110 to define a mounting groove 112. The sealing member 130 is installed in the mounting groove 112 and is installed between the bus bar member 120 and the case 110. The rupture disk 140 is engaged with the mounting groove 112, and a part of the rupture disk 140 is installed between the bus bar member 120 and the sealing member 130 so as to abut against the bus bar member 120 and the sealing member 130. The rupture disk 140 is provided with an explosion-proof part, and the mounting groove 112 for restricting the rupture disk 140 is defined by the case 110 and the bus bar member 120, thereby preventing the rupture disk 140 from loosening, and the sealing member 130 seals against the position of the mounting groove 112, thereby forming the case 110 as a sealed structure, and preventing the rupture disk 140 from loosening and coming off after being installed. The rupture disk 140 is provided with an explosion-proof part. When the pressure inside the case 110 increases and reaches a certain pressure release threshold of the rupture disk 140, the explosion-proof part of the rupture disk 140 deforms to form a pressure release passage to release the pressure, thereby preventing an explosion caused by excessive pressure in the case 110 and achieving the purpose of reducing the pressure inside the case 110.

[0026] The busbar member 120 mainly serves as a current conduction path inside the battery 200, and is usually used to connect the positive and negative electrode materials with an external circuit, contributing to lowering the internal resistance of the battery 200 and improving the current conduction efficiency. The rupture disk 140 is an important component in the safety design of the battery 200, and mainly functions to provide a safe pressure release passage when the internal pressure of the battery 200 rises abnormally, and to prevent the battery 200 from exploding. When gas accumulates inside the battery 200 due to overheating, short circuit or other abnormal conditions, and the pressure reaches a certain threshold, the rupture disk 140 bursts or deforms to release the internal pressure, which may involve a small amount of electrolyte leakage, but can avoid serious damage to the battery 200 structure or a more dangerous explosion accident.

[0027] In one embodiment, optionally, as shown in Figures 1 and 2, one end of the case 110 is bent to form a first bent portion 113, and the first bent portion 113 and the bus bar member 120 define the mounting groove 112, so that the rupture disk 140 can be engaged in the mounting groove 112.

[0028] Optionally, as shown in FIG. 2 , the outer periphery of the busbar member 120 is extended to form a second bent portion 121, so that the busbar member 120 forms a groove 122, and the rupture disk 140 is mounted in the groove 122. Correspondingly, the second bent portion 121 is formed as a groove wall of the groove 122, and the rupture disk 140 is mounted in the groove 122, so that the rupture disk 140 abuts against the busbar member 120.

[0029] In one embodiment, optionally, as shown in FIG. 3, the rupture disk 140 is a disk-shaped structure, and the rupture disk 140 is sealed at one end of the case 110 to match the shape of the busbar member 120 and the case 110, and the rupture disk 140 can protect the safety of equipment and people by its own timely rupture.

[0030] In one embodiment, as shown in Figures 3 and 4, the explosion-proof part optionally includes a first rupture score groove 141 and a second rupture score groove 142. If the first rupture score groove 141 and the second rupture score groove 142 do not intersect, and the pressure in the case 110 is excessive, the first rupture score groove 141 and / or the second rupture score groove 142 will rupture to release the gas in the case 110 relatively quickly, reduce the pressure in the case 110, and ensure the safety performance of the battery 200; and if the rupture occurs along the first rupture score groove 141 and / or the second rupture score groove 142, the damage to workers and equipment caused by the rupture disk 140 being directly ejected can be reduced.

[0031] Optionally, there are a plurality of the first rupture score grooves 141 , and a plurality of the first rupture score grooves 141 intersect at the same intersection 143 .

[0032] Optionally, the intersection point 143 is located at the center position of the rupture disk 140, as shown in FIGS.

[0033] Optionally, as shown in Fig. 4, the second rupture score groove 142 has an annular structure or a frame-like structure and is arranged to surround the first rupture score groove 141. The second rupture score groove 142 may have an annular structure or a frame-like structure.

[0034] As described above, the case 110 and the busbar member 120 of the battery explosion-proof structure 100 define the mounting groove 112 for restricting the rupture disk 140, thereby preventing the rupture disk 140 from loosening, and the sealing member 130 seals the mounting groove 112, thereby forming the case 110 as a sealed structure and preventing the rupture disk 140 from slipping out after being installed. The rupture disk 140 is provided with an explosion-proof part. When the pressure inside the case 110 increases and reaches a predetermined pressure release threshold of the rupture disk 140, the explosion-proof part of the rupture disk 140 deforms to form a pressure release passage to release the pressure, thereby preventing the explosion of the case 110 caused by excessive pressure, achieving the purpose of reducing the pressure inside the case 110, and improving the safety performance of the battery explosion-proof structure 100.

[0035] Example 2 As shown in Fig. 1, an embodiment of the present application provides another type of explosion-proof structure for a battery 100. The explosion-proof structure for a battery 100 includes a case 110, a busbar member 120, a sealing member 130, and a rupture disk 140.

[0036] Specifically, as shown in FIG. 1 and FIG. 2, an opening 111 is provided in the case 110. The bus bar member 120 is installed in the opening 111 and is connected to the case 110 to define a mounting groove 112. The sealing member 130 is installed in the mounting groove 112 and is installed between the bus bar member 120 and the case 110. The rupture disk 140 is engaged with the mounting groove 112, and is installed between the bus bar member 120 and the sealing member 130 so that a part of the rupture disk 140 abuts against the bus bar member 120 and the sealing member 130, thereby preventing the rupture disk 140 from loosening, and the sealing member 130 seals the mounting groove 112, thereby forming the case 110 as a sealed structure, and preventing the rupture disk 140 from loosening and coming off after being installed.

[0037] In this embodiment, the rupture disk 140 is provided with an explosion-proof portion, and the case 110 and the bus bar member 120 define a mounting groove 112 for restricting the rupture disk 140. When the pressure inside the case 110 increases and reaches a predetermined pressure release threshold of the rupture disk 140, the explosion-proof portion of the rupture disk 140 deforms to form a pressure release passage to release the pressure, thereby preventing an explosion caused by excessive pressure of the case 110 and achieving the purpose of reducing the pressure inside the case 110.

[0038] 1 and 2, one end of the case 110 is bent to form a first bent portion 113, and the first bent portion 113 and the bus bar member 120 define the mounting groove 112, so that the rupture disk 140 can be engaged in the mounting groove 112. Exemplarily, the first bent portion 113 is bent toward the bus bar member 120.

[0039] Optionally, as shown in FIG. 2, the outer periphery of the busbar member 120 extends to form a second bent portion 121, so that the busbar member 120 forms a groove 122, and the rupture disk 140 is mounted in the groove 122. Correspondingly, the second bent portion 121 is formed as a groove wall of the groove 122, and the rupture disk 140 is mounted in the groove 122, so that the rupture disk 140 abuts against the busbar member 120. Illustratively, the second bent portion is an annular structure.

[0040] Furthermore, the second bent portion 121 abuts against the side wall of the case 110, i.e., the second bent portion 121 of the busbar member 120 abuts against the side wall of the case 110, which can contribute to fixing and positioning the busbar member 120, reduce the gap between the busbar member 120 and the case 110, and provide better sealing.

[0041] In one embodiment, optionally, as shown in FIG. 3, the rupture disk 140 is a disk-shaped structure, and the rupture disk 140 is sealed at one end of the case 110 to match the shape of the busbar member 120 and the case 110. For example, the rupture disk 140 can be made of a composite material using coating technology, which can improve corrosion resistance, fatigue resistance, temperature adaptability, etc., and the disk-shaped rupture disk 140 can protect the safety of equipment and people by its own rupture due to its structural design and material selection.

[0042] In one embodiment, optionally, as shown in FIG. 3 and FIG. 4, the explosion-proof portion includes a first rupture score groove 141 and a second rupture score groove 142. When the first rupture score groove 141 and the second rupture score groove 142 do not intersect and the pressure inside the case 110 is excessive, the first rupture score groove 141 and / or the second rupture score groove 142 will rupture, thereby releasing the gas inside the case 110 relatively quickly, reducing the pressure inside the case 110, and ensuring the safety performance of the battery 200; and the rupture will occur along the first rupture score groove 141 and / or the second rupture score groove 142, that is, the rupture will occur along the first rupture score groove 141, or along the second rupture score groove 142, or along both the first rupture score groove 141 and the second rupture score groove 142, thereby reducing the damage to workers and equipment caused by the rupture disk 140 directly coming out and flying out.

[0043] Optionally, there are a plurality of the first rupture score grooves 141, and the plurality of the first rupture score grooves 141 intersect at the same intersection 143. In addition, two adjacent first rupture score grooves 141 are arranged at an angle, and the plurality of first rupture score grooves 141 can improve the explosion-proof performance of the rupture disk 140.

[0044] Optionally, as shown in FIG. 3 and FIG. 4, the intersection 143 is located at the center of the rupture disk 140. Exemplarily, the number of the first rupture score grooves 141 may be two, three, or four. When there are three first rupture score grooves 141, the angle between two adjacent first rupture score grooves 141 is 120°, and the three first rupture score grooves 141 form a "person" structure. When there are four first rupture score grooves 141, the angle between two adjacent first rupture score grooves 141 is 90°, and the four first rupture score grooves 141 form a "cross" structure. The number of the first rupture score grooves 141 may be more than four, and detailed description thereof will be omitted here.

[0045] Optionally, as shown in FIG. 4, the second rupture score groove 142 is an annular structure or a frame-like structure, and is arranged to go around the first rupture score groove 141. Correspondingly, the second rupture score groove 142 is an annular structure or a frame-like structure with both ends not connected, that is, the annular structure or the frame-like structure is provided with a notch, so that the fragments of the rupture disk 140 can be prevented from flying out when the rupture disk 140 ruptures along the second rupture score groove 142. In addition, the second rupture score groove 142 can be an annular structure or a frame-like structure.

[0046] Example 3 The embodiment of the present invention further provides a battery 200. The battery 200 includes the battery explosion-proof structure 100 according to the embodiment 1 or 2. The vehicle has all the beneficial effects of the battery explosion-proof structure 100, so the redundant description will be omitted here.

[0047] In all examples shown and described herein, any specific values ​​are exemplary only and not limiting, and thus, different values ​​may be used in other instances of the example embodiments.

[0048] The above examples are merely illustrative of some embodiments of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art may make some modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements also fall within the scope of protection of the present invention. [Explanation of symbols]

[0049] 100 battery explosion-proof structure 110 cases 111 Aperture 112 Mounting groove 113 1st bending section 120 Busbar components 121 2nd bending section 122 Groove 130 Sealing material 140 Rupture Disc 141 First burst score groove 142 Second burst score groove 143 Intersection 200 batteries

Claims

1. The coil spring includes a case, a bus bar member, a sealing member, and a rupture disk. An opening is provided in the case, the bus bar member is disposed in the opening and connects with the case to define a mounting groove; the sealing member is disposed in the mounting groove and between the bus bar member and the case; The rupture disk is engaged with the mounting groove, and a part of the rupture disk is installed between the bus bar member and the sealing member so as to abut against the bus bar member and the sealing member, and the rupture disk is provided with an explosion-proof portion. The explosion-proof structure for a battery is characterized by the following:

2. One end of the case is bent to form a first bent portion, and the mounting groove is defined by the first bent portion and the bus bar member.

2. The explosion-proof structure for a battery according to claim 1.

3. The outer periphery of the bus bar member is extended to form a second bent portion, whereby a groove is formed by the bus bar member, and the rupture disk is attached in the groove.

3. The explosion-proof structure for a battery according to claim 2.

4. The second bent portion abuts against a side wall of the case.

4. The explosion-proof structure for a battery according to claim 3.

5. The rupture disk is a disk-shaped structure.

2. The explosion-proof structure for a battery according to claim 1.

6. The explosion-proof portion includes a first rupture score groove and a second rupture score groove, and the first rupture score groove and the second rupture score groove do not intersect with each other.

6. The explosion-proof structure for a battery according to claim 1,

7. The first rupture score grooves are provided in a plurality of grooves, and the plurality of first rupture score grooves intersect at the same intersection point.

7. The explosion-proof structure for a battery according to claim 6.

8. The intersection is located at the center position of the rupture disk.

8. The explosion-proof structure for a battery according to claim 7.

9. The second rupture score groove is an annular or frame-shaped structure and is provided so as to surround the first rupture score groove.

7. The explosion-proof structure for a battery according to claim 6.

10. The battery explosion-proof structure according to any one of claims 1 to 5 is provided. A battery characterized in that

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