Battery structure assembly and battery
By designing deformable protrusions on the battery top cover and insulation components to accommodate the current collector and electrode tabs, the problem of low internal space utilization in the battery is solved, thereby improving the battery's energy density.
Patent Information
- Application Number
- CN202423103425.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The internal tabs of the battery are folded and welded to the current collector, taking up space and increasing the battery height, which reduces the energy density.
The top cover and insulation are designed with deformable protrusions to accommodate the current collector and the tabs, optimizing the internal space design of the battery. By setting the first and second deformable protrusions to accommodate the current collector and the tabs, the space occupied is reduced.
It improves the energy density of the battery, optimizes the internal space design of the battery, and reduces unnecessary space occupation.
Smart Images
Figure CN223743771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a battery structure component and a battery. Background Technology
[0002] With the rapid development of the energy storage equipment field, large-cell products are attracting increasing attention, making it particularly important to improve the space utilization rate of batteries. Inside the battery, the tabs of the cell generally need to be folded before being welded to the current collector. Folding the tabs occupies internal space of the battery, increasing the height dimension of the battery. However, the utilization rate of this increased space is low, which is not conducive to improving the energy density of the battery. Utility Model Content
[0003] One objective of this invention is to provide a battery structure component that optimizes the internal space design of the battery and improves the energy density of the battery.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] A battery structure assembly is provided, comprising:
[0006] A top cover having a first deformable protrusion that protrudes outward toward the battery.
[0007] A first insulating member is located on the end face of the top cover facing the inside of the battery, and the first insulating member has a second deformable protrusion that protrudes toward the top cover such that the second deformable protrusion is located in the back groove of the first deformable protrusion.
[0008] The battery cell is located inside the battery.
[0009] A current collector plate is welded to the tab of the battery cell, and the current collector plate and at least part of the tab are located in the back groove of the second deformed protrusion.
[0010] Optionally, it also includes a pole post, wherein the first deformable protrusion has a first through hole, the second deformable protrusion has a second through hole, the pole post is sequentially inserted through the first through hole and the second through hole, and connected to the current collector plate.
[0011] Optionally, the edge of the first deformable protrusion smoothly transitions with the body of the top cover;
[0012] And / or, the sidewall and bottom wall of the back groove of the first deformed protrusion have a smooth transition;
[0013] And / or, the edge of the second deformed protrusion smoothly transitions to the body of the first insulating member;
[0014] And / or, the sidewall of the back groove of the second deformed protrusion has a smooth transition with the bottom wall.
[0015] Optionally, the extension surface of the sidewall of the back groove of the first deformable protrusion forms an obtuse angle A with the plane in which the main body of the top cover is located;
[0016] And / or, the extension surface of the sidewall of the back groove of the second deformed protrusion forms an obtuse angle B with the plane containing the body of the first insulating member.
[0017] Optionally, the value of obtuse angle A is greater than the value of obtuse angle B.
[0018] Optionally, the second deformable protrusion is attached to the bottom wall of the back groove of the first deformable protrusion.
[0019] Optionally, it also includes a protective film, which covers the outside of the battery cell and is partially sandwiched between the top cover and the first insulating member.
[0020] Optionally, the protective film has a third through hole, and the second deformable protrusion is inserted into the third through hole.
[0021] Optionally, the protective film covers all sides of the battery cell except the side where the tab is located, and the protective film is integrally formed.
[0022] Another objective of this invention is to provide a battery that optimizes the internal space design and improves the energy density of the battery.
[0023] To achieve this objective, the present invention adopts the following technical solution:
[0024] A battery is provided, including a housing and the battery structure assembly described above, wherein a top cover is located at an opening of the housing and is connected to the housing to form the outer casing of the battery, and the battery cell is located inside the outer casing.
[0025] The beneficial effects of this utility model are:
[0026] This invention provides a battery structure assembly, including a top cover, a first insulating member, a battery cell, and a current collector. The top cover has a first deformable protrusion that protrudes outwards from the battery. The first insulating member is located on the end face of the top cover facing inwards from the battery, and has a second deformable protrusion that protrudes towards the top cover, such that the second deformable protrusion is located within a groove on the back side of the first deformable protrusion. The battery cell is located inside the battery, and the current collector is welded to the tabs of the battery cell. The current collector and at least some of the tabs are located within the groove on the back side of the second deformable protrusion. By providing the first and second deformable protrusions to accommodate the current collector and at least some of the tabs, the internal space design of the battery can be optimized, and the energy density of the battery can be improved.
[0027] This invention also provides a battery, including a housing and the aforementioned battery structure assembly. A top cover is located at the opening of the housing and is connected to the housing to form the battery casing. The battery cell is located inside the casing. This battery optimizes the internal space design and improves energy density. Attached Figure Description
[0028] Figure 1 This is an exploded view from a first perspective of the battery structure assembly provided in this embodiment of the present invention;
[0029] Figure 2 This is an exploded view from a second perspective of the battery structure assembly provided in this embodiment of the present invention;
[0030] Figure 3 This is a partial cross-sectional view of the battery structure assembly provided in this embodiment of the utility model.
[0031] In the picture:
[0032] 1. Top cover; 11. First deformed protrusion; 111. First through hole; 2. First insulating component; 21. Second deformed protrusion; 211. Second through hole; 212. Limiting post; 3. Current collector; 4. Electrode; 5. Electrode post; 6. Protective film; 61. Third through hole; 62. Fourth through hole; 63. Fifth through hole; 7. Sealing insulating ring; 71. Second insulating ring; 72. Sealing ring; 8. Explosion-proof valve; 9. Protective patch. Detailed Implementation
[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.
[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0036] like Figures 1-3 As shown, the battery structure assembly of this embodiment includes a top cover 1, a first insulating member 2, a battery cell, and a current collector 3. The top cover 1 has a first deformable protrusion 11 that protrudes outwards from the battery. The first insulating member 2 is located on the end face of the top cover 1 facing inwards from the battery, and the first insulating member 2 has a second deformable protrusion 21 that protrudes towards the top cover 1, such that the second deformable protrusion 21 is located within a groove on the back side of the first deformable protrusion 11. The battery cell is located inside the battery, and the current collector 3 is welded to the tabs 4 of the battery cell. The current collector 3 and at least some of the tabs 4 are located within the groove on the back side of the second deformable protrusion 21. By providing the first deformable protrusion 11 and the second deformable protrusion 21 to accommodate the current collector 3 and at least some of the tabs 4, the internal space design of the battery can be optimized, and the energy density of the battery can be improved.
[0037] Optionally, the battery structure assembly also includes a terminal post 5, a first deformable protrusion 11 having a first through hole 111, a second deformable protrusion 21 having a second through hole 211, the terminal post 5 passing through the first through hole 111 and the second through hole 211 in sequence, and connected to the current collector 3.
[0038] Optionally, in this embodiment, the end face of the terminal post 5 facing the inside of the battery is welded to the current collector 3, that is, one side of the current collector 3 is welded to the terminal post 5, and the other side is welded to the tab 4 of the battery cell.
[0039] Optionally, in this embodiment, the top cover 1 has a wrapping ring at the first through hole 111. After the electrode post 5 is inserted into the first through hole 111, the wrapping ring is bent to cover the side wall of the electrode post 5. By providing a protrusion on the side wall of the electrode post 5, the position of the electrode post 5 relative to the top cover 1 can be completely fixed, restricting the electrode post 5 from moving away from or closer to the battery cell in the axial direction. Of course, in other embodiments, other design methods such as setting a riveting block can also be used at the electrode post 5, which are not limited here.
[0040] Optionally, the battery structure assembly further includes a sealing insulating ring 7, which is sleeved on the terminal post 5 to ensure insulation between the terminal post 5 and the top cover 1. Optionally, in this embodiment, the sealing insulating ring 7 includes a second insulating ring 71 and a sealing ring 72.
[0041] Optionally, the edge of the first deformable protrusion 11 smoothly transitions to the main body of the top cover 1 to ensure the structural strength of this bend. Optionally, the sidewall and bottom wall of the back groove of the first deformable protrusion 11 smoothly transition to prevent sharp edges from scratching other components.
[0042] Optionally, the edge of the second deformable protrusion 21 smoothly transitions to the body of the first insulating member 2 to ensure the structural strength of this bend. Optionally, the sidewall and bottom wall of the back groove of the second deformable protrusion 21 smoothly transition to prevent sharp edges from scratching other components.
[0043] Optionally, the extension surface of the sidewall of the back groove of the first deformable protrusion 11 forms an obtuse angle A with the plane containing the main body of the top cover 1. By controlling the inclination angle of the sidewall of the back groove of the first deformable protrusion 11, the structural strength at the bend can be guaranteed as much as possible while ensuring that the depth of the back groove is sufficient to accommodate the current collector 3 and part of the electrode tab 4.
[0044] Optionally, the extension surface of the sidewall of the back groove of the second deformable protrusion 21 forms an obtuse angle B with the plane containing the main body of the first insulating member 2. Similarly, by controlling the inclination angle of the sidewall of the back groove of the second deformable protrusion 21, the structural strength at the bend can be guaranteed as much as possible while ensuring that the depth of the back groove is sufficient to accommodate the current collector 3 and part of the electrode tab 4.
[0045] Optionally, the value of obtuse angle A is greater than the value of obtuse angle B, so as to prevent the obtuse angle B from being too large and making it difficult to insert the second deformed protrusion 21 into the back groove of the first deformed protrusion 11.
[0046] Optionally, the second deformable protrusion 21 is attached to the bottom wall of the back groove of the first deformable protrusion 11, that is, there is no gap between the two occupying this space, so as to ensure maximum accommodation of the tab 4.
[0047] Optionally, the battery structure assembly also includes a protective film 6, which covers the outside of the battery cell. The protective film 6 is partially sandwiched between the top cover 1 and the first insulating member 2. That is, it is no longer necessary to weld and fix the protective film 6 and the first insulating member 2, so the first insulating member 2 does not need to be made too thick. Reducing the thickness of the first insulating member 2 can further reduce the space occupied inside the battery.
[0048] Optionally, a third through hole 61 is provided on the protective film 6, and the second deformable protrusion 21 is inserted into the third through hole 61, that is, the second deformable protrusion 21 extends into the back groove of the first deformable protrusion 11 through the third through hole 61.
[0049] Optionally, the protective film 6 covers all sides of the battery cell except the side where the tab 4 is located, and the protective film 6 is integrally formed. Optionally, the battery is a square battery, and the battery cell is also square, with the protective film 6 covering the five sides of the battery cell except the top surface with the tab 4.
[0050] Optionally, to facilitate positioning of the first insulating component 2, a limiting post 212 is provided on the first insulating component 2, and a corresponding limiting groove is provided on the top cover 1. A fourth through hole 62 is also provided on the end face of the protective film 6 where the third through hole 61 is located. The limiting post 212 passes through the fourth through hole 62 and is inserted into the limiting groove. Optionally, multiple limiting posts 212, fourth through holes 62, and limiting grooves are provided, and they are arranged in a one-to-one correspondence.
[0051] Optionally, the battery structure assembly also includes an explosion-proof valve 8 and a protective patch 9. The explosion-proof valve 8 is located at the explosion-proof through-hole of the top cover 1, and the protective patch 9 is located on the outside of the explosion-proof valve 8 to protect it from external damage. Optionally, the end face of the protective film 6 with the third through-hole 61 also has a fifth through-hole 63, which corresponds to the position of the explosion-proof valve 8. The first insulating member 2 also has a corresponding explosion-proof through-hole, so that the end face of the explosion-proof valve 8 facing the inside of the battery communicates with the internal space of the battery.
[0052] Optionally, in this embodiment, the top cover 1 is provided with two pole posts 5, and the top cover 1 is provided with a first deformable protrusion 11 at each of the two pole posts 5. The first insulating member 2 is provided with a second deformable protrusion 21 at each of the two pole posts 5. The protective film 6 is provided with two third through holes 61.
[0053] This embodiment also provides a battery, including a housing and the aforementioned battery structure assembly. A top cover 1 is located at the opening of the housing and is connected to the housing to form the battery casing. The battery cell is located inside the casing. This battery can optimize the internal space design and improve energy density.
[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A battery structure assembly, characterized by, The battery structure assembly comprises: a top cover (1) having a first deformed protrusion (11) protruding towards the outside of the battery; a first insulating piece (2) located at the end surface of the top cover (1) towards the inside of the battery, and having a second deformed protrusion (21) protruding towards the top cover (1) so as to be located in the back recess of the first deformed protrusion (11); a battery cell located in the inside of the battery; a current collecting plate (3) welded to the tab (4) of the battery cell, and both the current collecting plate (3) and at least part of the tab (4) being located in the back recess of the second deformed protrusion (21).
2. The battery structural assembly of claim 1, wherein, Further comprising a pole (5), the first deformed protrusion (11) is provided with a first through hole (111), the second deformed protrusion (21) is provided with a second through hole (211), and the pole (5) is sequentially arranged in the first through hole (111) and the second through hole (211) and connected to the current collecting plate (3).
3. The battery structural assembly of claim 1, wherein, The edge of the first deformed protrusion (11) is smoothly connected to the main body of the top cover (1); and / or, the side wall of the back recess of the first deformed protrusion (11) is smoothly connected to the bottom wall; and / or, the edge of the second deformed protrusion (21) is smoothly connected to the main body of the first insulating piece (2); and / or, the side wall of the back recess of the second deformed protrusion (21) is smoothly connected to the bottom wall.
4. The battery structural assembly of claim 1, wherein, The extension surface of the side wall of the back recess of the first deformed protrusion (11) forms an obtuse angle A with the plane where the main body of the top cover (1) is located; and / or, the extension surface of the side wall of the back recess of the second deformed protrusion (21) forms an obtuse angle B with the plane where the main body of the first insulating piece (2) is located.
5. The battery structural assembly of claim 4, wherein, The value of the obtuse angle A is greater than the value of the obtuse angle B.
6. The battery structural assembly of any one of claims 1-5, wherein, The second deformed protrusion (21) is attached to the bottom wall of the back recess of the first deformed protrusion (11).
7. The battery structural assembly of any one of claims 1-5, wherein, Further comprising a protective film (6) covering the outside of the battery cell, and the protective film (6) is partially arranged between the top cover (1) and the first insulating piece (2).
8. The battery structural assembly of claim 7, wherein, The protective film (6) is provided with a third through hole (61), and the second deformed protrusion (21) is arranged in the third through hole (61).
9. The battery structural assembly of claim 7, wherein, The protective film (6) covers the other surfaces of the battery cell except the surface where the tab (4) is located, and the protective film (6) is integrally formed.
10. A battery characterized by The battery structure assembly comprises a shell and the battery structure assembly according to any one of claims 1-9, the top cover (1) is located at the opening of the shell, and the top cover (1) is connected to the shell to form the shell of the battery, and the battery cell is located in the shell.