Cover plate assembly, battery and battery device

Abstract

The utility model relates to secondary battery technical field discloses a kind of cover plate assembly, battery and battery device, cover plate assembly includes: board ontology;Insulator is set in the side of board ontology;Insulator includes main part and circumferential boss, main part is parallel with board ontology, circumferential boss surrounds the edge of main part and extends to the side of deviating from board ontology;Insulator further includes at least one high part, high part is set in circumferential boss, and in the direction perpendicular to main part, the height of high part is greater than the height of circumferential boss.The cover plate assembly provided by the utility model can increase the area of the protection film hot melting point, make the combination of the protection film and the insulating piece more firm, while realizing the height optimization of the insulating piece, ensure the fixing requirement of the protection film in low height environment, reduce the short circuit risk caused by the protection film falling off or displacement, and improve the overall safety of the battery.

Description

Technical Field

[0001] This utility model relates to the field of secondary battery technology, specifically to a cover plate assembly, a battery, and a battery device. Background Technology

[0002] In the field of battery manufacturing, especially in the manufacturing process of wound batteries, the cells need to be insulated before being placed into the casing. The common insulation method is to cover the surface of the cell with a protective film. In order to ensure the fixation effect of the protective film, the relevant technology uses heat fusion to fix the protective film to the lower plastic.

[0003] However, as battery energy density increases, the height of the lower plastic layer gradually decreases. Existing hot-melt equipment often cannot meet the requirements of the hot-melt process, resulting in the protective film of the battery cell not being able to be stably fixed on the lower plastic layer, which in turn affects the insulation effect of the battery. Utility Model Content

[0004] In view of this, the present invention provides a cover plate assembly, a battery and a battery device to solve the problem that the plastic cannot effectively fix the protective film at low heights.

[0005] In a first aspect, this utility model provides a cover plate assembly, comprising:

[0006] board body;

[0007] An insulating member is disposed on one side of the plate body; the insulating member includes a main body and a circumferential boss, the main body is parallel to the plate body, and the circumferential boss surrounds the edge of the main body and extends toward the side opposite to the plate body; the insulating member also includes at least one raised part, the raised part is disposed on the circumferential boss, and in the direction perpendicular to the main body, the height of the raised part is greater than the height of the circumferential boss.

[0008] Beneficial Effects: Since the battery cell is wrapped with a protective film, which is fixed to the insulating component via heat fusion to prevent detachment or displacement, this embodiment increases the area at the heat fusion point of the protective film by providing a raised portion on the insulating component and then heat-fusion fixing the protective film to the raised portion. This results in a stronger bond between the protective film and the insulating component, effectively improving the fixing effect of the protective film. While optimizing the height of the insulating component, it ensures the fixing requirements of the protective film in low-height environments, reducing the risk of short circuits caused by protective film detachment or displacement, and improving the overall safety of the battery. It also meets the requirement of thinning the insulating component, thereby increasing the overall energy density of the battery and ensuring its safety performance at high energy densities. Furthermore, the raised portion makes the assembly of the protective film more convenient, reduces errors during assembly, simplifies the assembly process, improves production efficiency, and reduces production costs.

[0009] Secondly, this utility model also provides a battery, comprising:

[0010] shell;

[0011] And the cover assembly as described above, which together with the housing to form a receiving cavity;

[0012] Battery cell;

[0013] Protective film, suitable for covering the outside of the battery cell;

[0014] The battery cell and protective film are placed inside the receiving cavity;

[0015] The protective film is suitable for fixing to the raised portion of the cover plate assembly.

[0016] Since the battery includes a cover assembly, which has the same effect as the cover assembly, it will not be elaborated further here.

[0017] Thirdly, this utility model also provides a battery device, including the battery as described above.

[0018] Since the battery assembly includes a cover plate assembly, which has the same effect as the cover plate assembly, it will not be described in detail here. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an exploded view of the battery of this utility model;

[0021] Figure 2 This is an exploded view of the battery of this utility model after the outer casing has been removed;

[0022] Figure 3 This is a schematic diagram of the cover plate assembly and conductive assembly of this utility model;

[0023] Figure 4 This is an exploded view of the cover plate assembly of this utility model. Figure 1 ;

[0024] Figure 5 This is an exploded view of the cover plate assembly of this utility model. Figure 2 ;

[0025] Figure 6 This is a partial enlarged view of the cover plate assembly of this utility model;

[0026] Figure 7 This is a side view of the cover plate assembly of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Protective film; 2. Battery cell; 21. Electrode tab;

[0029] 3. Cover plate assembly; 31. Plate body; 311. Assembly slot; 312. Explosion-proof valve mounting hole; 32. Insulating component; 321. Main body; 322. Circumferential boss; 323. Heightened part; 324. Assembly column; 325. Abutment part; 326. Exhaust support part;

[0030] 4. Conductive components; 41. Terminal post; 42. Adapter plate; 5. Housing. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] In battery manufacturing, especially in the production of wound batteries, cell insulation is a crucial step. Due to their structural characteristics, wound batteries are prone to cell damage during the winding process, and their high energy density means that even a small short circuit can cause serious safety issues. Therefore, before the cells are encased, a protective film is often applied to their surface to ensure insulation, prevent short circuits, and thus guarantee battery safety.

[0036] However, with the continuous advancement of battery technology and the increasing energy density of batteries, the height of the lower plastic layer in wound batteries is gradually decreasing to meet the demands of high energy density. This makes it more difficult to fix the protective film on the battery cell. Traditional hot-melt fixing methods, due to the technical limitations of hot-melt equipment, often cannot meet the requirements for fixing the protective film on the low-height lower plastic layer. This results in the protective film not adhering stably to the lower plastic layer, easily leading to problems such as detachment or displacement. This not only easily affects the insulation effect of the battery but may also cause a short circuit inside the battery due to the loosening of the protective film, affecting the battery's safety performance.

[0037] To address the aforementioned issues, this embodiment provides a cover plate assembly. By improving the structure of the lower plastic, it satisfies both the increased energy density resulting from the reduced height of the lower plastic and the need to fix the protective film of the lower plastic at a lower height, thereby improving the energy density of the battery and effectively ensuring insulation performance.

[0038] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0039] According to an embodiment of the present invention, in one aspect, a cover plate assembly is provided, comprising:

[0040] Board body 31;

[0041] An insulating member 32 is disposed on one side of the plate body 31. The insulating member 32 includes a main body portion 321 and a circumferential boss 322. The main body portion 321 is parallel to the plate body 31, and the circumferential boss 322 surrounds the edge of the main body portion 321 and extends toward the side opposite to the plate body 31. The insulating member 32 also includes at least one raised portion 323, which is disposed on the circumferential boss 322, and in the direction perpendicular to the main body portion 321, the height of the raised portion 323 is greater than the height of the circumferential boss 322.

[0042] The plate body 31 can be made of aluminum, aluminum alloy, or stainless steel, etc. In this embodiment, the plate body 31 can be made of the same material as the outer shell 5, and the plate body 31 can be welded to the outer shell 5. The plate body 31 and the outer shell 5 together form a sealed battery cavity, and the battery cell 2 is placed in this cavity.

[0043] An insulating element 32 is provided on the side of the board body 31 facing the cell 2 to ensure that a reliable insulating layer is formed between the cell 2 and the board body 31 to prevent short circuit.

[0044] The insulating component 32 includes a main body 321 and a circumferential boss 322. The circumferential boss 322 is disposed around the edge of the main body 321 and extends from the main body 321 toward the cell 2. By providing the circumferential boss 322, the structural stability of the main body 321 can be improved. At the same time, by providing the circumferential boss 322, a stable support for the raised part 323 can be ensured, and the contact area between the raised part 323 and the circumferential boss 322 can be increased, thereby preventing the raised part 323 from breaking or deforming, thus enhancing the fixing effect of the protective film, effectively preventing it from falling off or shifting, and ensuring the insulation performance and safety of the battery.

[0045] Since the cell 2 is wrapped with a protective film 1, the protective film 1 is fixed to the insulating component 32 by heat fusion to prevent the protective film 1 from falling off or shifting. In this embodiment, by providing a raised portion 323 on the insulating component 32 and heat-fusion fixing the protective film 1 to the raised portion 323, the area at the heat fusion point of the protective film 1 can be increased, making the bond between the protective film 1 and the insulating component 32 more solid. This effectively improves the fixing effect of the protective film 1, optimizes the height of the insulating component 32, ensures the fixing requirements of the protective film 1 in low-height environments, reduces the risk of short circuits caused by the protective film 1 falling off or shifting, and improves the overall safety of the battery.

[0046] The cover plate assembly provided in this embodiment of the present invention, by providing a raised portion 323 on the circumferential boss 322 of the insulating member 32, allows the protective film 1 covering the surface of the cell 2 to be fixed to the raised portion 323, thereby ensuring that the protective film 1 can be reliably fixed. This ensures that the protective film is stable and does not fall off in a plastic environment at low heights, effectively avoiding the risk of short circuits caused by the loosening of the protective film, improving the insulation effect, meeting the requirement of thinning the insulating member 32, and thus increasing the overall energy density of the battery and ensuring the safety performance of the battery at high energy density. At the same time, the setting of the raised portion 323 makes the assembly of the protective film 1 more convenient, reduces errors in the assembly process, simplifies the assembly process, improves production efficiency, and reduces production costs.

[0047] In some embodiments, combined with Figure 7 As shown, the surface of the main body 321 facing the plate body 31 is the reference surface. In the direction perpendicular to the main body 321, the height of the circumferential boss 322 protruding relative to the reference surface is H1 (mm), and the height of the raised part 323 protruding relative to the reference surface is H3 (mm), satisfying: 0.5≤H3-H1≤3 (mm).

[0048] By limiting the height difference between H3 and H1, the heightened portion 323 effectively secures the protective film 1 without affecting the overall thickness of the insulating component 32. This avoids assembly difficulties caused by excessive thickness of the heightened portion 323, reduces the overlap area between the heightened portion 323 and the battery cell 2, and consequently reduces the contact pressure between the heightened portion 323 and the battery cell 2, preventing damage to the battery cell 2. Simultaneously, the reasonable height difference design also optimizes the structural strength of the insulating component 32, ensuring it is less prone to deformation during long-term use.

[0049] In some embodiments, the thickness of the heightened portion 323 is D, in mm, which satisfies: 0.5≤D≤2.

[0050] The thickness of the raised portion 323 is designed to be between 0.5mm and 2mm, which avoids increased assembly difficulty due to excessive material thickness. It also ensures uniform stress during the heat-fusion fixing process, preventing deformation or breakage of the raised portion 323 due to excessive stress, thus guaranteeing the heat-fusion fixing effect between the protective film 1 and the insulating component 32. Furthermore, the reasonable thickness range also helps reduce material costs.

[0051] In some embodiments, combined with Figure 6 , Figure 7 As shown, the insulating member 32 also includes an abutment portion 325, which extends from the plate body 31 toward the side opposite to the plate body 31.

[0052] The surface of the main body 321 facing the plate body 31 is the reference surface. In the direction perpendicular to the main body 321, the height of the circumferential boss 322 protruding relative to the reference surface is H1, the height of the abutment part 325 protruding relative to the reference surface is H2, and the height of the raised part 323 protruding relative to the reference surface is H3, satisfying: H3 > H2 > H1.

[0053] The insulating component 32 also includes an abutment portion 325, which extends from the plate body 31 toward the side opposite to the plate body 31. In this embodiment, the abutment portion 325 is adapted to contact the surface of the cell 2 facing the plate body 31 to form a stable support structure, ensuring that the cell 2 is not easily displaced during assembly, and further improving the overall stability and safety of the battery assembly.

[0054] Furthermore, by extending the abutment portion 325 on the plate body 31, the structural strength of the insulating component 32 can be further enhanced, effectively resisting external impacts and preventing damage to the insulating component 32.

[0055] By limiting the height H2 of the abutment portion 325 protruding relative to the reference surface to be greater than the height H1 of the circumferential boss 322 protruding relative to the reference surface, it is ensured that the abutment portion 325 supports the battery cell 2 while maintaining an appropriate gap between the battery cell 2 and the circumferential boss 322. On the one hand, this avoids damage to the battery cell 2 due to excessive contact. On the other hand, the existence of the gap is conducive to heat dissipation and ensures unobstructed exhaust path. In the event of thermal runaway of the battery, the high-temperature gas generated inside the battery can be quickly discharged, avoiding excessive internal pressure that could lead to an explosion. This effectively slows down heat accumulation and reduces the risk of thermal runaway.

[0056] Combination Figure 6 As shown, the abutment portion 325 is disposed on the inner side of the area enclosed by the circumferential boss 322. Specifically, the abutment portion 325 is disposed at the four corners of the main body portion 321.

[0057] As a variation, the circumferential bosses 322 located on both sides of the main body 321 along the length direction can have a height equal to the height of the abutment portion 325 relative to the reference surface, thereby increasing the contact area between the battery cell 2 and the insulating member 32 and improving support stability; or the height can be slightly smaller than the height of the abutment portion 325 to maintain a fine-tuning gap between the battery cell 2 and the circumferential bosses 322, ensuring that the battery cell 2 can still maintain good contact when subjected to minor deformation, and avoiding damage caused by excessive compression.

[0058] In some embodiments, the plate body 31 is provided with an explosion-proof valve mounting hole 312, and the insulating member 32 is provided with an exhaust support portion 326 corresponding to the explosion-proof valve mounting hole 312.

[0059] In the direction perpendicular to the main body 321, the exhaust support 326 protrudes at a height of H4 relative to the reference surface, satisfying: H4=H2.

[0060] An exhaust support portion 326 is formed on the insulating component 32 corresponding to the explosion-proof valve mounting hole 312, thereby facilitating the formation of a gas storage space, ensuring smooth gas discharge from inside the battery, and preventing gas accumulation that could lead to an explosion. Furthermore, the side of the exhaust support portion 326 facing the cell 2 can abut against the surface of the cell 2, further stabilizing the position of the cell 2 and preventing it from shifting under vibration or impact. In this embodiment, by limiting the height H4 of the exhaust support portion 326 to be equal to the height H2 of the abutment portion 325, the consistency of the support structure is ensured when the cell 2 is subjected to external force, effectively dispersing pressure, preventing localized stress concentration, and further improving the overall durability and reliability of the battery assembly.

[0061] In some embodiments, the raised portion 323 is disposed on the outer side of the area surrounding the circumferential boss 322.

[0062] By positioning the raised portion 323 outside the area surrounding the circumferential boss 322, direct contact between the raised portion 323 and the battery cell 2 is avoided, reducing damage caused by friction or collision. Ensuring that the battery cell 2 is not affected by the height of the raised portion 323 when in contact with the insulating component 32 is beneficial for improving the overall energy density of the battery and optimizing the utilization of internal battery space.

[0063] In some embodiments, multiple raised portions 323 are provided at intervals along the length direction of the main body portion 321.

[0064] It should be noted that the length direction of the main body 321 refers to the extension direction of the long side of the main body 321.

[0065] Along the length of the main body 321, multiple raised parts 323 are provided at intervals, thereby achieving multi-point fixation of the protective film 1, enhancing the overall stability of the protective film 1, preventing it from shifting or falling off during use, and further improving the safety and service life of the battery assembly.

[0066] In some embodiments, the plate body 31 has an explosion-proof valve mounting hole 312, and the insulating member 32 has an exhaust support portion 326 corresponding to the explosion-proof valve mounting hole 312. Along the length direction of the main body 321, at least one raised portion 323 is provided corresponding to the exhaust support portion 326.

[0067] By providing at least one heightening portion 323 corresponding to the exhaust support portion 326, the exhaust support portion 326 can support the heightening portion 323, thereby enhancing the overall structural stability.

[0068] In some embodiments, the abutting portion 325 is disposed at both ends of the main body portion 321 along the length direction; the raised portion 323 is disposed correspondingly to the abutting portion 325.

[0069] The corresponding arrangement of the abutment part 325 and the heightened part 323 further enhances the support effect of the heightened part 323, ensuring that it is not easily deformed when subjected to external forces, thereby improving the overall structural strength.

[0070] In some embodiments, at least one heightened portion 323 is provided along the width direction of the main body portion 321.

[0071] It should be noted that the length direction of the main body 321 refers to the direction in which the short side of the main body 321 extends, parallel to the plane of the plate body 31. The width direction of the main body 321 is perpendicular to its length direction.

[0072] By providing a raised portion 323 along the width direction of the main body portion 321, the lateral fixing effect of the protective film 1 is further enhanced, effectively preventing its displacement under lateral force.

[0073] In some embodiments, combined with Figure 4 , Figure 5 As shown, the plate body 31 is provided with a plurality of mounting slots 311 or mounting posts 324 on the side facing the main body 321, and the main body 321 is provided with a plurality of mounting posts 324 or mounting slots 311 on the side facing the plate body 31, and the mounting slots 311 and the mounting posts 324 are engaged and fitted together.

[0074] By precisely engaging the assembly slot 311 with the assembly column 324, a tight connection between the plate body 31 and the main body 321 is achieved, improving the overall assembly accuracy and stability of the component.

[0075] In this embodiment, a plurality of mounting slots 311 are provided on the side of the plate body 31 facing the main body portion 321, and a plurality of mounting posts 324 are correspondingly provided on the side of the main body portion 321 facing the plate body 31.

[0076] In some embodiments, the insulating element 32 is integrally formed.

[0077] The unibody design simplifies the manufacturing process, reduces assembly steps, and improves production efficiency. At the same time, the seamless connection of the overall structure enhances the mechanical strength of the insulating component 32, further improving the safety of the battery assembly.

[0078] According to an embodiment of the present invention, another aspect provides a battery comprising:

[0079] 5. Outer shell;

[0080] And the cover plate assembly 3 as described above, the cover plate assembly 3 and the outer shell 5 together enclose and form a receiving cavity;

[0081] Cell 2;

[0082] Protective film 1, which is adapted to cover the outside of the battery cell 2;

[0083] Battery cell 2 and protective film 1 are placed inside the receiving cavity;

[0084] The protective film 1 is adapted to be fixed to the raised portion 323 of the cover plate assembly 3.

[0085] The cover assembly 3 is fixed to the outer casing 5 by welding, ensuring the overall sealing and structural stability of the battery.

[0086] The protective film 1 covers the outside of the battery cell 2, effectively isolating the battery cell from direct contact with the outer casing and reducing the risk of short circuit. At the same time, the protective film 1 is suitable for fixing to the raised part 323 of the cover plate assembly 3, further ensuring that the protective film 1 can effectively cover the battery cell 2.

[0087] In some embodiments, the protective film 1 is heat-fused to the raised portion 323.

[0088] The protective film 1 and the raised part 323 can be fixed by heat fusion, which enhances the bonding strength between the protective film 1 and the raised part 323 and ensures that they are not easy to fall off during long-term use.

[0089] In some embodiments, the insulating member 32 of the cover plate assembly 3 includes an abutment portion 325, the battery cell 2 is adapted to abut against the abutment portion 325; and in the abutment state between the abutment portion 325 and the battery cell 2, the raised portion 323 is located on the outer periphery of the battery cell 2.

[0090] The battery cell 2 is adapted to abut against the contact portion 325, ensuring that the battery cell 2 is stably fixed within the receiving cavity and avoiding the risk of internal short circuits due to vibration or displacement. Simultaneously, the raised portion 323 further facilitates the fixing of the protective film 1. Furthermore, when the contact portion 325 is in contact with the battery cell 2, the raised portion 323 is located on the outer periphery of the battery cell 2, thereby preventing the raised portion 323 from having abutting contact with the battery cell 2 along the height direction and avoiding any impact on the internal space utilization of the battery due to the presence of the raised portion 323.

[0091] In some embodiments, a tab 21 is formed on one side of the battery cell 2, and a cover plate assembly 3 is disposed on the side of the battery cell 2 on which the tab 21 is formed;

[0092] The battery also includes a conductive component 4, which includes a terminal post 41 disposed on the cover plate assembly 3 and an adapter piece 42 connecting the terminal post 41 and the tab 21.

[0093] According to an embodiment of the present invention, in another aspect, a battery device is also provided, including the battery described above. The battery device includes a plurality of the batteries described above, which are connected in parallel or in series to form a battery pack, and are installed inside the casing of the battery device.

[0094] Battery devices are used to provide power to electric vehicles, energy storage systems, or portable electronic devices.

[0095] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A cover plate assembly, characterized in that, include: Board body(31); An insulating member (32) is disposed on one side of the plate body (31); the insulating member (32) includes a main body (321) and a circumferential boss (322), the main body (321) is parallel to the plate body (31), the circumferential boss (322) surrounds the edge of the main body (321) and extends toward the side away from the plate body (31); the insulating member (32) also includes at least one raised part (323), the raised part (323) is disposed on the circumferential boss (322), and in a direction perpendicular to the main body (321), the height of the raised part (323) is greater than the height of the circumferential boss (322).

2. The cover plate assembly according to claim 1, characterized in that, The surface of the main body (321) facing the plate body (31) is a reference surface. In the direction perpendicular to the main body (321), the height of the circumferential boss (322) protruding relative to the reference surface is H1, in mm, and the height of the raised part (323) protruding relative to the reference surface is H3, in mm, satisfying: 0.5≤H3-H1≤3, in mm.

3. The cover plate assembly according to claim 1, characterized in that, The thickness of the heightened part (323) is D, in mm, and satisfies: 0.5≤D≤2.

4. The cover plate assembly according to claim 1, characterized in that, The insulating member (32) further includes an abutment portion (325) that extends from the plate body (31) toward a side away from the plate body (31); The surface of the main body (321) facing the plate body (31) is a reference surface. In the direction perpendicular to the main body (321), the height of the circumferential boss (322) protruding relative to the reference surface is H1, the height of the abutment part (325) protruding relative to the reference surface is H2, and the height of the raised part (323) protruding relative to the reference surface is H3, satisfying: H3 > H2 > H1.

5. The cover plate assembly according to claim 4, characterized in that, The plate body (31) has an explosion-proof valve mounting hole (312), and the insulating part (32) has an exhaust support part (326) corresponding to the explosion-proof valve mounting hole (312); In the direction perpendicular to the main body (321), the height of the exhaust support (326) protruding relative to the reference surface is H4, satisfying: H4 = H2.

6. The cover plate assembly according to claim 1, characterized in that, The raised portion (323) is located on the outside of the area surrounding the circumferential boss (322).

7. The cover plate assembly according to claim 1, characterized in that, Along the length direction of the main body (321), a plurality of heightened portions (323) are provided at intervals.

8. The cover plate assembly according to claim 7, characterized in that, The plate body (31) has an explosion-proof valve mounting hole (312), and the insulating member (32) has an exhaust support part (326) corresponding to the explosion-proof valve mounting hole (312). Along the length direction of the main body (321), at least one of the raised parts (323) is provided corresponding to the exhaust support part (326).

9. The cover plate assembly according to claim 7, characterized in that, The insulating member (32) further includes an abutment portion (325), which is disposed at both ends of the main body portion (321) along the length direction; the raised portion (323) is disposed corresponding to the abutment portion (325).

10. The cover plate assembly according to claim 1, characterized in that, At least one heightened portion (323) is provided along the width direction of the main body portion (321).

11. The cover plate assembly according to any one of claims 1 to 10, characterized in that, The plate body (31) is provided with a plurality of assembly slots (311) or assembly posts (324) on the side facing the main body (321), and the main body (321) is provided with a plurality of assembly posts (324) or assembly slots (311) on the side facing the plate body (31), and the assembly slots (311) and the assembly posts (324) are engaged with each other.

12. The cover plate assembly according to any one of claims 1 to 10, characterized in that, The insulating component (32) is integrally formed.

13. A battery, characterized in that, include: Outer shell (5); And a cover assembly (3) as described in any one of claims 1 to 12, the cover assembly (3) and the housing (5) together enclosing a receiving cavity; Battery cell (2); A protective film (1) is adapted to cover the outside of the battery cell (2); The battery cell (2) and the protective film (1) are placed inside the receiving cavity; The protective film (1) is adapted to be fixed to the raised portion (323) of the cover plate assembly (3).

14. The battery according to claim 13, characterized in that, The protective film (1) is heat-fused to the raised part (323).

15. The battery according to claim 13, characterized in that, The insulating member (32) of the cover plate assembly (3) includes an abutment portion (325), the battery cell (2) is adapted to abut against the abutment portion (325); and in the abutment state between the abutment portion (325) and the battery cell (2), the raised portion (323) is located on the outer periphery of the battery cell (2).

16. The battery according to claim 13, characterized in that, A tab (21) is formed on one side of the battery cell (2), and the cover plate assembly (3) is disposed on the side of the battery cell (2) where the tab (21) is formed; The battery also includes a conductive component (4), which includes a terminal post (41) disposed on the cover plate assembly (3) and an adapter piece (42) connecting the terminal post (41) and the tab (21).

17. A battery device, characterized in that, The battery includes any one of claims 13 to 16.

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