Cover plate structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises: a cover plate body, which is provided with a liquid injection hole; the insulating plate is arranged on one side of the large surface of the cover plate body, and an avoiding hole is formed in the position, corresponding to the liquid injection hole, of the insulating plate; the side, away from the cover plate body, of the insulating plate extends to form a plurality of protrusions, and the protrusions are arranged around the receding hole. The area of the end face of the side, away from the insulating plate, of each protrusion is defined as a, the shortest distance between every two adjacent protrusions is defined as b, and a / b is larger than or equal to 0.2 mm and smaller than or equal to 45 mm. According to the cover plate structure provided by the utility model, the diaphragm close to one side of the insulating plate can be supported, the diaphragm is prevented from being adsorbed to the avoiding hole or the liquid injection hole due to negative pressure, and the avoiding hole or the liquid injection hole is prevented from being blocked, so that the smooth operation of secondary liquid injection is ensured.

Description

Technical Field

[0001] This application is a divisional application of the application number 2024216844767, filed on July 16, 2024, and the patent name is "Cover structure and battery." The utility model relates to the field of battery technology, and specifically to a cover structure and a battery. Background Art

[0002] A battery generally consists of a cell, a housing, and a cover. The cover is sealed against the opening of the housing, so that the housing and cover together form a chamber in which the cell is placed. The cover is usually provided with an injection hole to facilitate the injection of electrolyte. Cells can be prepared in various forms, including wound and laminated. Both require a separator between the positive and negative electrodes. After the cell is placed in the chamber, the edge of the separator is positioned toward the cover.

[0003] However, during the negative pressure formation process, the negative pressure will cause the diaphragm to be adsorbed on the injection hole, blocking the injection hole and thus affecting the secondary injection of the battery. Utility Model Content

[0004] In view of this, the present invention provides a cover plate structure and a battery to solve the problem that the diaphragm easily blocks the injection hole and affects the secondary injection of the battery.

[0005] In a first aspect, the present invention provides a cover plate structure, comprising:

[0006] The cover body is provided with a liquid injection hole;

[0007] An insulating plate is disposed on one side of the large surface of the cover body, and a relief hole is formed on the insulating plate corresponding to the injection hole; a plurality of protrusions are formed on the insulating plate extending toward a side away from the cover body, and the plurality of protrusions are disposed around the relief hole;

[0008] The end surface area of ​​the protrusion away from the insulating plate is defined as a, and the shortest distance between two adjacent protrusions is defined as b, satisfying: 0.2mm≤a / b≤45mm.

[0009] Beneficial effect: The cover plate structure provided by the embodiment of the present invention has a plurality of protrusions extending from the side of the insulating plate away from the cover plate body, and the plurality of protrusions are arranged around the avoidance hole; by providing the protrusions, the diaphragm close to the insulating plate can be supported, and the diaphragm is prevented from being adsorbed on the avoidance hole or the injection hole due to negative pressure, and the avoidance hole or the injection hole is prevented from being blocked, thereby ensuring the smooth progress of the secondary injection. By limiting the relationship between the end surface area a of the protrusion away from the insulating plate and the shortest distance b between two adjacent protrusions, when the shortest distance b between two adjacent protrusions is constant, if the end surface area a of the protrusion away from the insulating plate is too small, it is easy for the protrusion to have insufficient support for the diaphragm, making the diaphragm easily adsorbed on the avoidance hole, thereby blocking the injection hole; if the end surface area a of the protrusion away from the insulating plate is too large, it is easy to occupy too much electrolyte flow space, affecting the rate of electrolyte inflow during injection. On the contrary, when the end face area a of the protrusion away from the insulating plate is constant, if the shortest distance b between two adjacent protrusions is too large, it is easy for the protrusions to provide insufficient support for the diaphragm, causing the diaphragm between the two adjacent protrusions to collapse, and then it is easy to be adsorbed on the avoidance hole and block the injection hole; if the shortest distance b between two adjacent protrusions is too small, it is also easy to cause insufficient circulation space for the electrolyte, thereby affecting the rate of electrolyte inflow during injection.

[0010] In a second aspect, the present invention further provides a battery, comprising:

[0011] battery cells; and

[0012] Such as the cover plate structure mentioned above;

[0013] The insulating plate is arranged between the battery core and the cover plate body.

[0014] In the direction perpendicular to the plane of the insulating plate, the shortest distance between the battery cell and the protrusion is S, satisfying: 0mm≤S≤5mm.

[0015] Beneficial Effects: By limiting the minimum distance S between the cell and the protrusion to a lower limit, a certain gap can be maintained between the cell and the protrusion, leaving space for the diaphragm to deform under the action of negative pressure suction, preventing the diaphragm from being blocked by negative pressure adsorption in the avoidance hole. At the same time, by limiting the minimum distance S between the cell and the protrusion to an upper limit, it can avoid size waste and improve the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the cover structure of the utility model Figure 1 ;

[0018] Figure 2 This is an exploded schematic diagram of the cover structure of the present invention;

[0019] Figure 3 Schematic diagram of the cover structure of the utility model Figure 2 ;

[0020] Figure 4 This is a bottom view of the cover structure of the utility model;

[0021] Figure 5 This is a partial enlarged view of the insulation board of the utility model;

[0022] Figure 6 for Figure 4 Schematic diagram of the AA section;

[0023] Figure 7 for Figure 4 Schematic diagram of the deformation of the insulation board from the perspective of the middle AA section.

[0024] Description of reference numerals:

[0025] 1. Cover plate body; 11. Liquid injection hole;

[0026] 2. Insulation plate; 21. Avoidance hole; 22. Protrusion; 23. Groove;

[0027] 3. Pole; 4. Explosion-proof valve. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] 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 orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, 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 specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] A battery generally includes a cell, a shell, and a cover plate, wherein the cover plate is sealed at the opening of the shell so that the shell and the cover plate enclose a receiving cavity, and the cell is arranged in the receiving cavity. After the battery is assembled, the interior of the receiving cavity needs to be injected with liquid. Usually, an injection hole is opened on the cover plate so that the electrolyte can be injected into the battery through the injection hole. The cell is made of a positive electrode sheet, a negative electrode sheet, and a diaphragm that are stacked or wound. The diaphragm is placed between the positive electrode sheet and the negative electrode sheet to achieve ion conduction and electronic insulation. Common materials for the diaphragm are PP, PE, etc. When the cover plate is set on one side of the cell tab lead-out terminal, the diaphragm is close to the injection hole because it exceeds the positive and negative electrode sheets. When the cover plate and the cell tab lead-out terminal are not on the same side, the diaphragm will wrap around the cell for a certain distance after the stacking or winding is completed, resulting in the diaphragm being closer to the injection hole.

[0033] During the primary injection process, the electrolyte is injected into the holding cavity through the injection hole under positive pressure. At this time, the diaphragm is some distance away from the injection hole, which does not affect normal injection. After the electrolyte is injected into the battery cell, a negative pressure formation process is required. During this process, the interior of the battery case is under negative pressure. The diaphragm is easily adsorbed to the injection hole due to the negative pressure, blocking the injection hole and affecting the secondary injection of the battery.

[0034] The following combination Figures 1 to 7 , describing the embodiments of the present utility model.

[0035] According to an embodiment of the present invention, on the one hand, a cover plate structure is provided, comprising:

[0036] The cover body 1 is provided with a liquid injection hole 11;

[0037] The insulating plate 2 is disposed on one side of the large surface of the cover body 1. The insulating plate 2 has an avoidance hole 21 corresponding to the injection hole 11. The insulating plate 2 extends toward a side away from the cover body 1 to form a plurality of protrusions 22. The plurality of protrusions 22 are disposed around the avoidance hole 21.

[0038] The area of ​​the end surface of the protrusion 22 away from the insulating plate 2 is defined as a, and the shortest distance between two adjacent protrusions 22 is defined as b, which satisfies: 0.2 mm ≤ a / b ≤ 45 mm.

[0039] In this embodiment, the cover body 1 may be made of aluminum, aluminum alloy, stainless steel, or the like.

[0040] The cover plate structure of this embodiment is applied to batteries. During the assembly process of the battery, the battery cell is first loaded into the shell, and then the cover plate structure is sealed and set at the opening of the shell. The cover plate structure is composed of a cover plate body 1 and an insulating plate 2, wherein the insulating plate 2 can play a role in abutting the battery cell to prevent the battery cell from moving along the loading direction, and at the same time, the insulating plate 2 can insulate the battery cell from the cover plate body 1. Since the battery cell includes a diaphragm, under normal circumstances, the diaphragm will not block the injection hole 11, and during a single injection process, the electrolyte is injected into the accommodating cavity from the injection hole 11 under the action of positive pressure. At this time, the electrolyte can easily break through the diaphragm and will not affect the normal injection. After the electrolyte is injected into the battery, a negative pressure formation process is required. During this process, the interior of the battery is in a negative pressure state. The diaphragm close to the insulating plate 2 side is easily adsorbed on the avoidance hole 21 or the injection hole 11 due to the negative pressure, causing obstruction to the avoidance hole 21 or the injection hole 11, affecting the secondary injection of the battery.

[0041] The cover plate structure provided by the embodiment of the present invention has a plurality of protrusions 22 extending from the side of the insulating plate 2 away from the cover plate body 1, and the plurality of protrusions 22 are arranged around the avoidance hole 21; by providing the protrusions 22, the diaphragm close to the side of the insulating plate 2 can be supported to prevent the diaphragm from being adsorbed on the avoidance hole 21 or the injection hole 11 due to negative pressure, thereby preventing the avoidance hole 21 or the injection hole 11 from being blocked, thereby ensuring the smooth progress of the secondary injection.

[0042] The cover plate structure provided by the embodiment of the present invention limits the relationship between the end surface area a of the protrusion 22 away from the insulating plate 2 and the shortest distance b between two adjacent protrusions 22. When the shortest distance b between two adjacent protrusions 22 is constant, if the end surface area a of the protrusion 22 away from the insulating plate 2 is too small, it is easy to cause the protrusion 22 to have insufficient support force on the diaphragm, so that the diaphragm is easily adsorbed at the avoidance hole, thereby blocking the injection hole; if the end surface area a of the protrusion 22 away from the insulating plate 2 is too large, it is easy to occupy too much electrolyte circulation space, affecting the rate of electrolyte inflow during injection. On the contrary, when the end face area a of the protrusion 22 away from the insulating plate 2 is constant, if the shortest distance b between two adjacent protrusions 22 is too large, it is easy to cause insufficient support of the protrusion 22 on the diaphragm, causing the diaphragm between the two adjacent protrusions 22 to collapse, and then it is easy to be adsorbed on the avoidance hole to block the injection hole; if the shortest distance b between two adjacent protrusions 22 is too small, it is also easy to cause insufficient circulation space for the electrolyte, thereby affecting the rate of electrolyte inflow during injection.

[0043] In this embodiment, the cover body 1 is further provided with a pole 3 and an explosion-proof valve 4 .

[0044] In some embodiments, the value range of a is 2 mm. 2 ≤a≤45mm 2 , the value range of b is 1mm≤b≤10mm.

[0045] As a further preferred embodiment, the value range of a is 3 mm 2 ≤a≤40mm 2 , the value range of b is 1mm≤b≤10mm.

[0046] In some embodiments, the value of a can be 3 mm. 2 or 5mm 2 or 8mm 2 or 10mm 2 or 15mm 2 or 20mm 2 or 25mm 2 or 28mm 2 or 30mm 2 or 33mm 2 or 37mm 2 or 40mm 2 wait.

[0047] In some embodiments, the value of b can be 1 mm, 3 mm, 5 mm, 6 mm, 7 mm, 9 mm, 10 mm, etc.

[0048] In some embodiments, combined Figure 6As shown, in a direction perpendicular to the plane where the insulating plate 2 is located, the height of the protrusion 22 protruding from the insulating plate 2 is defined as h, and satisfies: 0.5mm≤a / h≤40mm.

[0049] Considering that under extreme operating conditions, the diaphragm always fits the plurality of protrusions 22 , at this time, the flow area of ​​the electrolyte is the area between two adjacent protrusions 22 .

[0050] By defining the relationship between the height h of the protrusion 22 protruding from the insulating plate 2 and the end surface area a of the protrusion 22 on the side away from the insulating plate 2, when a is large, h can be appropriately increased to ensure the flow area between two adjacent protrusions 22, thereby ensuring the flow rate of electrolyte between adjacent protrusions 22; at the same time, the upper limit of h should be limited to avoid interference between the protrusion 22 and the battery cell, thereby avoiding increasing the difficulty of forming the insulating plate 2. In addition, when a is small, h can be appropriately lowered to avoid the protrusion 22 being too high, resulting in the inability to process and form; at the same time, the lower limit of h should be limited to avoid the protrusion 22 being too low protruding from the insulating plate 2, thereby avoiding the inability to ensure the flow area between two adjacent protrusions 22, thereby avoiding affecting the flow rate of electrolyte between adjacent protrusions 22.

[0051] In some embodiments, the area of ​​the large surface of the cover body 1 is defined as M, and the sum of the end surface areas of the plurality of protrusions 22 away from the insulating plate 2 is A, satisfying: 37≤M / A≤1500, where the value range of M is 3000mm 2 ≤M≤15000mm 2 , the value range of A is 10mm 2 ≤A≤80mm 2 .

[0052] In this embodiment, the area M of the larger surface of the cover body 1 is comparable to the area of ​​the insulating plate 2, and is also comparable to the area of ​​the diaphragm that can be adsorbed on the insulating plate 2. By limiting the relationship between the area M of the larger surface of the cover body 1 and the sum of the end surface areas A of the multiple protrusions 22 facing away from the insulating plate 2, the total end surface area of ​​the multiple protrusions 22 is ensured to be sufficient to support the diaphragm. This prevents a situation where the protrusions 22 are unable to support the diaphragm after being adsorbed and contacting the multiple protrusions 22 due to the total end surface area being too small, thereby preventing the multiple protrusions 22 from being able to support the diaphragm, thereby preventing the diaphragm from blocking the avoidance hole 21.

[0053] In some embodiments, the value of M can be 3000 mm. 2 or 5000mm 2 or 8000mm 2 or 10000mm 2 or 13000mm 2 or 15000mm 2 wait.

[0054] In some embodiments, the value of A can be 10 mm. 2 or 15mm 2 or 25mm 2 or 30mm 2 or 35mm 2 or 40mm 2 or 50mm 2 or 55mm 2 or 60mm 2 or 70mm 2 or 75mm 2 or 80mm 2 wait.

[0055] In some embodiments, combined Figure 6 As shown, along the extension direction of the protrusion 22, the cross-sectional area of ​​the protrusion 22 parallel to the plane where the insulating plate 2 is located gradually decreases.

[0056] By gradually reducing the cross-sectional area of ​​the protrusion 22 parallel to the plane where the insulating plate 2 is located, the processing and forming of the insulating plate 2 can be facilitated, and the structural strength of the protrusion 22 can be ensured.

[0057] Combine Figure 6 As shown, along the extension direction of the protrusion 22, the protrusion 22 forms an R angle at one end of the body away from the insulating plate 2, so that the cross-sectional area there is smaller than the cross-sectional area of ​​other areas of the protrusion 22 parallel to the plane where the insulating plate 2 is located.

[0058] In other embodiments, combined Figure 7 As shown, along the extension direction of the protrusion 22, the cross-sectional area of ​​the protrusion 22 parallel to the plane where the insulating plate 2 is located gradually increases.

[0059] By gradually increasing the cross-sectional area of ​​the protrusion 22 parallel to the plane of the insulating plate 2, it is possible to ensure that when the diaphragm is in the extreme operating condition of being in contact with multiple protrusions 22, the area between two adjacent protrusions 22 is further increased, thereby increasing the amount of electrolyte passing between two adjacent protrusions 22 and ensuring smooth liquid injection.

[0060] In some embodiments, 0.5≤a / b≤10 is satisfied.

[0061] In some embodiments, combined Figure 3 、 Figure 5 、 Figure 6 As shown, a groove portion 23 is formed on the surface of the insulating plate 2 on one side facing away from the cover plate body 1. In a direction perpendicular to the plane where the insulating plate 2 is located, the projection of the avoidance hole 21 falls within the range of the groove portion 23, and the projection of the protrusion 22 falls within the range of the groove portion 23.

[0062] In a direction perpendicular to the plane of the insulating plate 2 , the height of the protrusion 22 protruding from the insulating plate 2 is defined as h, and the depth of the groove 23 recessed from the insulating plate 2 is defined as t, satisfying: h>t.

[0063] By forming a groove portion 23 on the surface of the insulating plate 2 facing away from the cover plate body 1 and setting the avoidance hole 21 within the range of the groove portion 23, the gap between the insulating plate 2 and the diaphragm can be increased, thereby increasing the flow area and reducing the risk of the avoidance hole 21 being blocked by the diaphragm.

[0064] At the same time, the protrusion 22 is arranged within the range of the groove portion 23, and the height h of the protrusion 22 raised from the insulating plate 2 is greater than the depth t of the groove portion 23 recessed from the insulating plate 2, thereby ensuring that the protrusion 22 smoothly supports the diaphragm and further increasing the area for flow between two adjacent protrusions 22, thereby ensuring the amount of electrolyte passing between two adjacent protrusions 22, and arranging the protrusion 22 in the groove portion 23 can reduce the height of the protrusion 22 as a whole, thereby improving the space utilization inside the battery.

[0065] In addition, combined Figure 3 As shown, the insulating plate 2 further has a protruding abutment formed on the side near the cell. This abutment is used to abut the surface of the cell to ensure that the cell is tightly abutted when installed, preventing the cell from bouncing along the installation direction under bumpy conditions, and ensuring that the cell is securely fixed. In this embodiment, the shortest distance between the protrusion 22 and the negative electrode sheet of the cell is greater than or equal to the shortest distance between the abutment portion of the insulating plate 2 and the cell. This prevents the protrusion 22 from protruding from the surface of the insulating plate near the cell, thereby preventing the protrusion 22 from damaging the cell.

[0066] In some embodiments, combined Figure 5 As shown, the avoidance hole 21 is a circular hole; there are four protrusions 22, which surround the avoidance hole 21 and are evenly distributed.

[0067] By arranging four protrusions 22 around the avoidance hole 21 and distributing them evenly, it is possible to ensure that there is sufficient flow area between every two adjacent protrusions 22, and to ensure that multiple protrusions 22 evenly support the diaphragm, so that after the electrolyte flows out of the avoidance hole 21, it is dispersed more evenly, thereby improving the infiltration efficiency of the electrolyte into the battery cell and ensuring the infiltration effect.

[0068] In some embodiments, combined Figure 5 As shown, the minimum distance between the edge of the protrusion 22 close to the avoidance hole 21 and the avoidance hole 21 is e, and satisfies: 0.5 mm ≤ e ≤ 3 mm.

[0069] By limiting the minimum spacing e between the edge of the protrusion 22 near the avoidance hole 21 and the avoidance hole 21 to a lower limit, the protrusion 22 can be smoothly formed and interference between the protrusion 22 and the avoidance hole 21 can be avoided. At the same time, by limiting the minimum spacing e between the edge of the protrusion 22 near the avoidance hole 21 and the avoidance hole 21 to an upper limit, the protrusion 22 and the avoidance hole 21 can be prevented from being too far apart, preventing the flexible diaphragm from forming a large depression in the middle area between the support positions of the multiple protrusions 22. This prevents the diaphragm from being easily blocked by negative pressure adsorbed on the avoidance hole 21, thereby ensuring smooth flow through the avoidance hole 21.

[0070] According to an embodiment of the present invention, on the other hand, a battery is provided, comprising:

[0071] battery cells; and

[0072] Such as the cover plate structure mentioned above;

[0073] In a direction perpendicular to the plane of the insulating plate 2 , the shortest distance between the battery cell and the protrusion 22 is S, satisfying: 0 mm ≤ S ≤ 5 mm.

[0074] By limiting the minimum distance S between the battery cell and the protrusion 22 to a lower limit, a certain gap can be maintained between the battery cell and the protrusion 22, leaving space for the diaphragm to deform under the action of negative pressure suction, preventing the diaphragm from being blocked by the negative pressure adsorption in the avoidance hole 21. At the same time, by limiting the minimum distance S between the battery cell and the protrusion 22 to an upper limit, it can avoid dimensional waste and improve the energy density of the battery.

[0075] Obviously, the above embodiments are merely examples for the purpose of clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A cover plate structure, characterized in that: include: A cover plate body (1) is provided with a liquid injection hole (11); An insulating plate (2) is arranged on one side of the large surface of the cover plate body (1), and a avoidance hole (21) is provided on the insulating plate (2) at a position corresponding to the injection hole (11); the insulating plate (2) extends toward a side away from the cover plate body (1) to form a plurality of protrusions (22), and the plurality of protrusions (22) are arranged around the avoidance hole (21); The end surface area of ​​the protrusion (22) away from the insulating plate (2) is defined as a, and the shortest distance between two adjacent protrusions (22) is defined as b, satisfying: 0.2 mm ≤ a / b ≤ 45 mm; Along the extension direction of the protrusion (22), the cross-sectional area of ​​the protrusion (22) parallel to the plane where the insulating plate (2) is located gradually increases; The value range of a is 3mm2≤a≤40mm2, and the value range of b is 1mm≤b≤10mm.

2. The cover plate structure according to claim 1, characterized in that: In a direction perpendicular to the plane where the insulating plate (2) is located, the height of the protrusion (22) protruding from the insulating plate (2) is defined as h, and satisfies the following: 0.5 mm ≤ a / h ≤ 40 mm.

3. The cover plate structure according to claim 1, characterized in that: The area of ​​the large surface of the cover plate body (1) is defined as M, and the sum of the end surface areas of the plurality of protrusions (22) away from the insulating plate (2) is defined as A, satisfying: 37≤M / A≤1500, wherein the value range of M is 3000mm 2 ≤M≤15000mm 2 , the value range of A is 10mm 2 ≤A≤80mm 2 .

4. The cover plate structure according to any one of claims 1 to 3, characterized in that: A groove portion (23) is formed on a surface of the insulating plate (2) on one side facing away from the cover plate body (1); in a direction perpendicular to the plane where the insulating plate (2) is located, the projection of the avoidance hole (21) falls within the range of the groove portion (23), and the projection of the protrusion (22) falls within the range of the groove portion (23); In a direction perpendicular to the plane where the insulating plate (2) is located, the height of the protrusion (22) protruding from the insulating plate (2) is defined as h, and the depth of the groove portion (23) recessed from the insulating plate (2) is defined as t, satisfying: h>t.

5. The cover plate structure according to claim 1, characterized in that: The minimum distance between the edge of the protrusion (22) close to the avoidance hole (21) and the avoidance hole (21) is e, and satisfies: 0.5mm≤e≤3mm.

6. A battery, characterized in that: include: battery cells; as well as The cover plate structure according to any one of claims 1 to 5; The insulating plate (2) is arranged between the battery core and the cover plate body (1).

7. The battery according to claim 6, characterized in that In a direction perpendicular to the plane where the insulating plate (2) is located, the shortest distance between the battery core and the protrusion (22) is S, satisfying: 0mm≤S≤5mm.

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