Battery structure assembly and battery
By setting slots on the cover plate and making the marks of the explosion-proof valve lie in the through holes, the problems of failure of the explosion-proof valve and welding holes and dummy welding are solved, and the safety and cost reduction of the battery are achieved.
Patent Information
- Application Number
- CN202422249514.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, the seam welding process between explosion-proof valves and top covers is prone to welding holes, poor welding and dummy welding problems, resulting in increased cost of top covers scrapping.
The slots on the cover plate and the score design are adopted. The explosion-proof valve is sealed in the slots, so that the scores are located in the through holes, avoid welding, and the fixed-point release of high-pressure and high-temperature fluid is achieved through the scores to ensure battery safety.
It avoids poor welding of explosion-proof valves, welding holes, and false welding problems, and reduces the cost of battery scrapping.
Smart Images
Figure CN223193871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage equipment, in particular to a battery structure component and a battery. Background Art
[0002] The explosion-proof valve is an essential safety component for batteries. Existing technology typically welds the valve to the top cover using a seam welding process. However, seam welding is prone to problems such as weld holes and poor welds. Furthermore, the weld lines between the valve and the top cover can overlap at the start and end of the weld, creating areas of overlap and making it difficult to identify issues like cold welds. This can further increase the cost of scrapping the valve after it enters the subsequent process. Any abnormality or other problems with the valve can render the entire top cover useless. Utility Model Content
[0003] One purpose of the utility model is to provide a battery structure assembly that can avoid problems such as poor welding of explosion-proof valves, weld holes, and cold welds, thereby reducing scrap costs.
[0004] To achieve this purpose, the present invention adopts the following technical solutions:
[0005] A battery structure assembly is provided, comprising:
[0006] a cover plate, wherein a slot is formed on a side wall of the cover plate along a first direction, and a through hole is formed on the cover plate along a second direction, wherein the through holes are located on the side walls on opposite sides of the slot, wherein the second direction is perpendicular to a plate surface of the cover plate, and the first direction is perpendicular to the second direction;
[0007] An explosion-proof valve is provided with a notch, and the explosion-proof valve is sealed and inserted into the slot so that the notch is located in the through hole.
[0008] Optionally, a sealing ring is further included, which is located in the slot, surrounds the outside of the through hole, and is clamped between the explosion-proof valve and the inner wall of the slot.
[0009] Optionally, the slot has a first side wall and a second side wall arranged opposite to each other along the second direction, and the through hole is formed through the first side wall and the second side wall;
[0010] The sealing ring includes a first sealing ring, which is clamped between the explosion-proof valve and the first side wall, and / or the sealing ring includes a second sealing ring, which is clamped between the explosion-proof valve and the second side wall.
[0011] Optionally, the slot has a first side wall and a second side wall arranged opposite to each other along the second direction, the through hole is opened through the first side wall and the second side wall, a first limiting ring is protruded from the first side wall toward the second side wall, the first limiting ring is arranged around the outside of the through hole, and the sealing ring is arranged around the outside of the first limiting ring;
[0012] And / or, a second limiting ring is protruded from the second side wall toward the first side wall, the second limiting ring is arranged around the outside of the through hole, and the sealing ring is arranged around the outside of the second limiting ring.
[0013] Optionally, the explosion-proof valve includes a first part and a second part, the first part corresponds to the through hole, the thickness of the first part is smaller than the thickness of the second part, and the second part blocks the notch of the slot.
[0014] Optionally, the sealing ring is interference fit with the explosion-proof valve and the inner wall of the slot.
[0015] Optionally, the sealing ring is plastic-molded on the explosion-proof valve.
[0016] Optionally, the inner wall of the slot includes a first guide surface, one end of the first guide surface is located at the notch of the slot, and the explosion-proof valve has a second guide surface, which matches the first guide surface.
[0017] Optionally, both the first guide surface and the second guide surface are curved surfaces, and the curved surfaces protrude toward the notch.
[0018] Another object of the present invention is to provide a battery that can avoid problems such as poor welding of explosion-proof valves, welding holes, and cold welding, thereby reducing scrapping costs.
[0019] To achieve this purpose, the present invention adopts the following technical solutions:
[0020] A battery is provided, comprising a box body and the above-mentioned battery structure assembly, wherein the cover plate is located at the opening of the box body, and the cover plate is sealed and connected to the box body to form an outer shell of the battery.
[0021] Beneficial effects of the utility model:
[0022] The utility model provides a battery structure component, including a cover plate and an explosion-proof valve. The side wall of the cover plate is provided with a slot along the first direction, and the cover plate is provided with a through hole along the second direction. The through holes are located at the side walls on opposite sides of the slot. The second direction is perpendicular to the plate surface of the cover plate, and the first direction is perpendicular to the second direction. The explosion-proof valve is provided with a notch, and the explosion-proof valve seal is inserted into the slot so that the notch is located in the through hole. By inserting the explosion-proof valve seal into the slot provided on the side wall of the cover plate, and making the notch of the explosion-proof valve located in the through hole, it can be ensured that when high pressure occurs inside the battery, the explosion-proof valve will rupture at the notch, realizing the fixed-point release of high-pressure and high-temperature fluid, thereby ensuring the safety of the battery. The above-mentioned sealing insertion method can replace the welding fixation method, which can avoid the occurrence of problems such as poor welding of the explosion-proof valve, welding holes, and cold welding, thereby reducing the scrapping cost.
[0023] The utility model also provides a battery comprising a box body and the aforementioned battery structure assembly, wherein a cover plate is located at the opening of the box body and is sealed to the box body to form the battery housing. This battery can avoid problems such as poor welding of the explosion-proof valve, weld holes, and cold welds, thereby reducing scrap costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic structural diagram of a battery structure assembly provided by an embodiment of the present utility model;
[0025] Figure 2 The explosion of the battery structure assembly provided by the embodiment of the utility model Figure 1 ;
[0026] Figure 3 The explosion of the battery structure assembly provided by the embodiment of the utility model Figure 2 ;
[0027] Figure 4 is a cross-sectional view of a battery structure assembly provided by an embodiment of the present utility model;
[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle.
[0029] In the picture:
[0030] 1. Cover plate; 11. Slot; 111. First side wall; 1111. First limiting ring; 112. Second side wall; 113. First guide surface; 12. Through hole;
[0031] 2. Explosion-proof valve; 21. First portion; 211. Notch; 22. Second portion; 23. Step surface; 24. Second guide surface;
[0032] 3. The first sealing ring. DETAILED DESCRIPTION
[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention, and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.
[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0036] The explosion-proof valve is an essential safety component for batteries. Existing technology typically welds the valve to the top cover using a seam welding process. However, seam welding is prone to problems such as weld holes and poor welds. Furthermore, the weld lines between the valve and the top cover can overlap at the start and end of the weld, creating areas of overlap and making it difficult to identify issues like cold welds. This can further increase the cost of scrapping the valve after it enters the subsequent process. Any abnormality or other problems with the valve can render the entire top cover useless.
[0037] In order to avoid problems such as poor welding of explosion-proof valves, weld holes, and cold welds, and to reduce scrap costs, this embodiment provides a battery structure assembly.
[0038] like Figure 1-Figure 5 As shown, the battery structure assembly of this embodiment includes a cover plate 1 and an explosion-proof valve 2. Figure 2The ab direction is the first direction, the cd direction is the second direction, and the ef direction is the third direction. A slot 11 is defined along the sidewall of the cover plate 1 along the first direction, and a through hole 12 is defined along the second direction. Through holes 12 are located on the sidewalls on opposite sides of slot 11. The second direction is perpendicular to the surface of the cover plate 1, and the first direction is perpendicular to the second direction. The explosion-proof valve 2 is plate-shaped and has a notch 211 thereon. The explosion-proof valve 2 is sealed and inserted into the slot 11, such that the notch 211 is located within the through hole 12. By sealingly inserting the explosion-proof valve 2 into the slot 11 defined in the sidewall of the cover plate 1, and ensuring that the notch 211 of the explosion-proof valve 2 is located within the through hole 12, it is ensured that when high pressure is generated within the battery, the explosion-proof valve 2 ruptures at the notch 211, achieving the targeted release of high-pressure, high-temperature fluid and ensuring battery safety. This sealed insertion method can replace welding and fixation, thereby avoiding problems such as poor welding of the explosion-proof valve 2, weld holes, and cold welds, and reducing scrap costs.
[0039] Optionally, the battery structure assembly further includes a sealing ring, which is located in the slot 11 , surrounds the outside of the through hole 12 , and is sandwiched between the explosion-proof valve 2 and the inner wall of the slot 11 .
[0040] Optionally, the slot 11 has a first side wall 111 and a second side wall 112 disposed opposite each other along the second direction, and the through hole 12 is formed through the first side wall 111 and the second side wall 112. In this embodiment, the notch is located on the side wall of the cover plate 1 with the smallest area, and the through hole 12 is formed on the plate surface of the cover plate 1.
[0041] like Figure 5 As shown, optionally, in this embodiment, the sealing ring includes a first sealing ring 3, and the first sealing ring 3 is clamped between the explosion-proof valve 2 and the first side wall 111, that is, the first sealing ring 3 is located on the side of the explosion-proof valve 2 facing the first side wall 111. In this embodiment, the first side wall 111 is close to the inside of the battery, and the second side wall 112 is close to the outside of the battery.
[0042] Optionally, in other embodiments, the sealing ring includes a second sealing ring, which is sandwiched between the explosion-proof valve 2 and the second side wall 112. The first sealing ring 3, the second sealing ring, or both the first sealing ring 3 and the second sealing ring can be provided to further improve the sealing performance. It is known that both the first sealing ring 3 and the second sealing ring can prevent airflow from entering the battery from the outside.
[0043] Optionally, the sealing ring has an interference fit with the explosion-proof valve 2 and the inner wall of the slot 11. Taking the first sealing ring 3 as an example, the first sealing ring 3 can, on the one hand, block airflow between the explosion-proof valve 2 and the first side wall 111, and on the other hand, abut the explosion-proof valve 2, causing the explosion-proof valve 2 to abut the second side wall 112, blocking airflow between the explosion-proof valve 2 and the second side wall 112, thereby forming a secondary seal. It is important to note that the sealing ring can clamp the explosion-proof valve 2, preventing the explosion-proof valve 2 from shifting out of the slot 11.
[0044] To prevent the sealing ring from shifting and causing the seal to fail, a first limiting ring 1111 is optionally provided on the first side wall 111, projecting toward the second side wall 112. A gap is defined between the first limiting ring 1111 and the second side wall 112, allowing the sealing ring to be inserted through the gap. The edge of the explosion-proof valve 2 can also be inserted through the gap, so the gap must be greater than the thickness of the explosion-proof valve 2 at this location. The first limiting ring 1111 surrounds the outside of the through hole 12, and the sealing ring surrounds the outside of the first limiting ring 1111, i.e., the first limiting ring 1111 can limit the inner ring of the sealing ring, which here refers to the first sealing ring 3 abutting the first side wall 111.
[0045] Optionally, for embodiments in which a second sealing ring is provided, a second limiting ring may be provided on the second side wall 112, projecting toward the first side wall 111. The second limiting ring is provided around the outside of the through hole 12, and the sealing ring is provided around the outside of the second limiting ring. That is, the second limiting ring may limit the inner ring of the sealing ring, which of course refers to the second sealing ring abutting the second side wall 112. Similarly, a gap is provided between the second limiting ring and the first side wall 111 to allow the second sealing ring to be inserted through the gap, and the edge of the explosion-proof valve 2 may also be inserted through the gap. Therefore, the gap needs to be greater than the thickness of the explosion-proof valve 2 at this point. If the first limiting ring 1111 and the second limiting ring are set at the same time, the gap between the two must be greater than the thickness of the explosion-proof valve 2 at this point. The first sealing ring 3 is located in the space jointly enclosed by the first side wall 111, the first limiting ring 1111, and the side of the explosion-proof valve 2 facing the first side wall 111, and the second sealing ring is located in the space jointly enclosed by the second side wall 112, the second limiting ring, and the side of the explosion-proof valve 2 facing the second side wall 112.
[0046] like Figure 3 As shown, the explosion-proof valve 2 optionally includes a first portion 21 and a second portion 22. The first portion 21 corresponds to the through hole 12. The thickness of the first portion 21 is less than that of the second portion 22, so that the first portion 21 can be inserted into the above-mentioned gap, and the second portion 22 blocks the notch of the slot 11. A step surface 23 is provided between the first portion 21 and the second portion 22. Optionally, the step surface 23 conforms to the shape of the sealing ring, that is, the step surface 23 can be used to limit the position of the outer ring of the sealing ring, further preventing the sealing ring from shifting and ensuring effective sealing.
[0047] In this embodiment, the notch 211, through-hole 12, and sealing ring of the first portion 21 have the same elliptical shape, and the outline of the first portion 21 is also elliptical. Of course, in other embodiments, the notch 211, through-hole 12, and sealing ring of the first portion 21 may also have other shapes, and this is not limiting here. The outline of the first portion 21 may also be different from the shapes of the notch 211, through-hole 12, and sealing ring, and this is not limiting here.
[0048] Optionally, in this embodiment, the sealing ring and the explosion-proof valve 2 are provided as separate components. In other embodiments, the sealing ring and the explosion-proof valve 2 may be provided as an integral component, for example, by plastic molding the sealing ring on the explosion-proof valve 2. It is understood that the integrated configuration can further restrict the position of the sealing ring, thereby ensuring that the explosion-proof valve 2 does not fall out of the slot 11.
[0049] To facilitate insertion of the explosion-proof valve 2 into the slot 11, the inner wall of the slot 11 optionally includes a first guide surface 113, one end of which is located at the slot opening of the slot 11. The explosion-proof valve 2 has a second guide surface 24, which mates with the first guide surface 113. Optionally, both the first guide surface 113 and the second guide surface 24 are curved surfaces, protruding toward the slot opening. That is, during insertion of the explosion-proof valve 2, the first guide surface 113 guides the explosion-proof valve 2 until the first portion 21 is located at the bottom of the slot 11. Optionally, when the first portion 21 is located at the bottom of the slot 11, the end surface of the second portion 22 is flush with the side wall of the cover plate 1. Optionally, both side walls of the slot 11 are set as first guide surfaces 113, and the two first guide surfaces 113 are protruding toward each other, and the explosion-proof valve 2 is also correspondingly provided with two second guide surfaces 24. When the explosion-proof valve 2 is inserted into the bottom of the slot 11, the two second guide surfaces 24 respectively contact the two first guide surfaces 113.
[0050] Optionally, the battery structure assembly further includes a pole, which is provided on the cover plate 1. Optionally, the pole can be fixed to the cover plate 1 by encapsulation or riveting. Optionally, the cover plate 1 is further provided with a liquid injection hole for injecting electrolyte.
[0051] If the sealing ring and explosion-proof valve 2 are separate components, the sealing ring can be installed first, then secured with a retaining ring, and then the explosion-proof valve 2 can be inserted. The explosion-proof valve 2 is sealed and secured by compressing the sealing ring, eliminating the need for seam welding. The burst value of the explosion-proof valve 2 can be controlled by adjusting the thickness of the notch 211. This battery structure assembly avoids the potential for weld defects associated with seam welding and also mitigates issues such as deformation and thermal shrinkage that can easily occur when welding the cover plate 1 to the explosion-proof valve 2. Because the cover plate 1 and explosion-proof valve 2 do not require welding, they can be made of different materials. This design also expands the range of materials available for the cover plate 1 and explosion-proof valve 2, such as steel for the cover plate 1 and plastic for the explosion-proof valve 2. If the explosion-proof valve 2 exhibits an abnormality or other quality issues, and the other components of the cover plate 1 are otherwise in good condition, only the explosion-proof valve 2 can be replaced, reducing costs.
[0052] This embodiment also provides a battery comprising a housing and the aforementioned battery structure assembly. A cover plate 1 is positioned at the opening of the housing and is sealed to the housing to form the battery casing. The sidewalls of the cover plate 1, which has a slot 11, are connected to the housing to seal the slot and prevent the explosion-proof valve 2 from disengaging from the slot 11. This battery can prevent problems such as poor welding of the explosion-proof valve 2, weld holes, and cold welds, thereby reducing scrap costs.
[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A battery structure assembly, characterized in that: include: A cover plate (1), wherein a slot (11) is provided on a side wall of the cover plate (1) along a first direction, and a through hole (12) is provided on the cover plate (1) along a second direction, wherein the through hole (12) is located on the side walls on opposite sides of the slot (11), the second direction is perpendicular to the plate surface of the cover plate (1), and the first direction is perpendicular to the second direction; An explosion-proof valve (2) is provided with a notch (211), and the explosion-proof valve (2) is sealed and inserted into the slot (11) so that the notch (211) is located in the through hole (12).
2. The battery structure assembly according to claim 1, characterized in that: It also includes a sealing ring, which is located in the slot (11), surrounds the outside of the through hole (12), and is sandwiched between the explosion-proof valve (2) and the inner wall of the slot (11).
3. The battery structure assembly according to claim 2, characterized in that: The slot (11) has a first side wall (111) and a second side wall (112) arranged opposite to each other along the second direction, and the through hole (12) is opened through the first side wall (111) and the second side wall (112); The sealing ring includes a first sealing ring (3), the first sealing ring (3) being sandwiched between the explosion-proof valve (2) and the first side wall (111), and / or the sealing ring includes a second sealing ring, the second sealing ring being sandwiched between the explosion-proof valve (2) and the second side wall (112).
4. The battery structure assembly according to claim 2, characterized in that: The slot (11) has a first side wall (111) and a second side wall (112) arranged opposite to each other along the second direction; the through hole (12) is opened through the first side wall (111) and the second side wall (112); the first side wall (111) is provided with a first limiting ring (1111) protruding toward the second side wall (112); the first limiting ring (1111) is arranged around the outside of the through hole (12); and the sealing ring is arranged around the outside of the first limiting ring (1111); And / or, a second limiting ring is protruded from the second side wall (112) toward the first side wall (111), the second limiting ring is arranged around the outside of the through hole (12), and the sealing ring is arranged around the outside of the second limiting ring.
5. The battery structure assembly according to claim 4, characterized in that: The explosion-proof valve (2) comprises a first portion (21) and a second portion (22), wherein the first portion (21) corresponds to the through hole (12), the thickness of the first portion (21) is smaller than the thickness of the second portion (22), and the second portion (22) blocks the notch of the slot (11).
6. The battery structure assembly according to claim 2, characterized in that: The sealing ring is interference-fitted with the explosion-proof valve (2) and the inner wall of the slot (11).
7. The battery structure assembly according to claim 2, characterized in that: The sealing ring is plastic-molded on the explosion-proof valve (2).
8. The battery structure assembly according to claim 1, characterized in that: The inner wall of the slot (11) includes a first guide surface (113), one end of the first guide surface (113) is located at the notch of the slot (11), and the explosion-proof valve (2) has a second guide surface (24), and the second guide surface (24) matches the first guide surface (113).
9. The battery structure assembly according to claim 8, characterized in that: The first guide surface (113) and the second guide surface (24) are both curved surfaces, and the curved surfaces are convex toward the notch.
10. A battery, characterized in that It comprises a box body and a battery structure assembly according to any one of claims 1 to 9, wherein the cover plate (1) is located at the opening of the box body, and the cover plate (1) is sealed and connected to the box body to form the outer shell of the battery.