Cover plate assembly and battery monomer

Abstract

The utility model discloses a cover plate assembly and a battery monomer, the cover plate assembly comprises: an insulating part, the insulating part extends along a first direction and comprises a first part and a second part, one ends of the first part and the second part facing each other are clamped and connected, the ends, deviating from each other, of the first component and the second component are provided with first mounting holes penetrating through the insulating part in the vertical direction. And the number of the pole columns is two, and the two pole columns are respectively arranged in the two first mounting holes in a penetrating manner. According to the cover plate assembly, the first part and the second part have certain adjusting spaces in the first direction, so that the influence of thermal expansion and cold contraction on the size of the insulating part can be counteracted, the center line of the pole and the center line of the first mounting hole are collinear, the problems of deviation and deflection of the pole and the insulating part during assembly are solved, and the service life of the pole and the insulating part is prolonged. And the qualification rate of the cover plate assembly and the safety of the single battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery cell. Background Art

[0002] With the increasing maturity of lithium-ion battery technology, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the use performance and safety of lithium-ion batteries are increasing day by day. The cover plate is a key component in a lithium-ion battery, and its functions include welding with the housing to form a sealed cavity, leading out the positive and negative electrodes of the electrode group, and serving as an assembly carrier, etc.

[0003] The insulating part is an important component structure of the cover plate. The insulating part is provided with a pole hole for the pole post to pass through. However, during the assembly process of the cover plate, since the insulating part is a plastic part formed by injection molding, the size of the insulating part is likely to change due to thermal expansion and contraction, which makes the assembly of the pole post and the insulating part prone to deviation, resulting in the deviation and skew of the insulating part or the pole post, and there is a certain safety risk. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a cover plate assembly, which can offset the influence of thermal expansion and contraction on the size of the insulating part, and further realize the coaxiality of the center line of the pole post and the center line of the first mounting hole, solving the problems such as the offset and skew of the assembly of the pole post and the insulating part.

[0005] The utility model also provides a battery cell, which includes the above-mentioned cover plate assembly.

[0006] The cover plate assembly according to the embodiment of the utility model includes: an insulating part, which extends along a first direction and includes a first component and a second component. One end of the first component and the second component facing each other is connected by snap fit. Both ends of the first component and the second component facing away from each other are provided with first mounting holes penetrating the insulating part in the up and down direction; two pole posts, and the two pole posts are respectively inserted into the two first mounting holes.

[0007] According to the cover plate assembly of the embodiment of the utility model, the insulating part extends along the first direction and includes the first component and the second component. By connecting one end of the first component and the second component facing each other by snap fit, both ends of the first component and the second component facing away from each other are provided with first mounting holes penetrating the insulating part in the up and down direction, so that both the first component and the second component have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating part, and further realizing the coaxiality of the center line of the pole post and the center line of the first mounting hole, solving the problems such as the offset and skew of the assembly of the pole post and the insulating part, improving the qualification rate of the cover plate assembly and the safety of the battery cell using the cover plate assembly.

[0008] In some embodiments of the present invention, the first component includes a first main body portion and a first matching portion, the first matching portion is located at one end of the first main body portion facing the second component, the first mounting hole is located on the first main body portion, the first matching portion has a protrusion protruding toward the second component, the second component has a second matching portion at one end facing the first component, the second matching portion has a mounting groove, the protrusion is located in the mounting groove and is spaced apart from at least one inner wall of the mounting groove along the first direction.

[0009] In some embodiments of the present invention, in a cross section perpendicular to the up-down direction, the protrusion is in an arc shape protruding toward the second component, and the mounting groove is in an arc shape.

[0010] In some embodiments of the utility model, the second mating portion includes a first limiting rib, a second limiting rib and a connecting portion, the first limiting rib is located on a side of the second limiting rib close to the first component and is separated from the second limiting rib, the two ends of the connecting portion along the first direction are respectively connected to the lower end of the first limiting rib and the lower end of the second limiting rib, the first limiting rib, the second limiting rib and the connecting portion form the installation groove, and the lower surface of the protrusion is fitted with the upper surface of the connecting portion.

[0011] In some embodiments of the present invention, the upper end of the first limiting rib has a first guide surface, and the first guide surface is inclined downward in the direction from the second component to the first component; and / or the lower end of the protrusion has a second guide surface, and the second guide surface is inclined upward in the direction from the first component to the second component.

[0012] In some embodiments of the utility model, the first matching portion further includes: adjustment ribs, which are two and elastic. Along the second direction, the two adjustment ribs are respectively located on both sides of the protrusion, and one end of the protrusion away from the second component is respectively connected to the two adjustment ribs, and the two adjustment ribs extend in directions away from each other, and the first direction, the second direction and the upper and lower directions are perpendicular.

[0013] In some embodiments of the utility model, the first matching portion also includes: supporting ribs, wherein there are two supporting ribs and the ribs extend along the first direction, one end of the two supporting ribs are respectively connected to one end of the two adjusting ribs facing away from each other, and the other end is connected to the first main body portion, and the first main body portion and the protrusion are spaced apart along the first direction.

[0014] In some embodiments of the present invention, the lower surface of the first component is flush with the lower surface of the second component; and / or a sealing ring is provided between the pole and the inner wall of the first mounting hole.

[0015] In some embodiments of the utility model, it also includes: a cover body, the cover body has a second mounting hole penetrating the cover body along the up-down direction, the insulating member is provided on at least one side of the cover body along the up-down direction, and the pole is passed through the first mounting hole and the second mounting hole.

[0016] A battery cell according to an embodiment of the present invention includes the above-mentioned cover plate assembly.

[0017] According to the battery cell of the embodiment of the utility model, a cover plate assembly is provided, the insulating member extends along a first direction and includes a first component and a second component, and is connected by snapping one end of the first component and the second component toward each other, and the first component and the second component have one end away from each other and a first mounting hole that penetrates the insulating member along the up-down direction, so that the first component and the second component have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating member, and further achieving the center line of the pole and the center line of the first mounting hole being in line, thereby solving the problem of assembly offset and skew of the pole and the insulating member, and improving the safety of the battery cell.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is an exploded view of a cover plate assembly according to an embodiment of the utility model;

[0021] Figure 2 is a structural diagram of an insulating member according to an embodiment of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 is a top view of an insulating member according to an embodiment of the utility model;

[0024] Figure 5 is along Figure 4 Sectional view along the midline BB;

[0025] Figure 6 yesFigure 5 Enlarged view at position C;

[0026] Figure 7 It is a structural diagram of a first component according to an embodiment of the present utility model;

[0027] Figure 8 It is a structural diagram of a second component according to an embodiment of the present utility model;

[0028] Figure 9 is Figure 8 Enlarged view at position D.

[0029] Reference numerals:

[0030] 100, cover plate assembly;

[0031] 1, insulating part; 11, first component; 111, first body part; 1111, first mounting hole; 112, first mating part; 1121, protruding part; 11211, second guiding surface; 1122, adjusting rib; 1123, supporting rib; 12, second component; 121, second body part; 122, second mating part; 1221, first limiting rib; 12211, first guiding surface; 1222, second limiting rib; 1223, connecting part; 1224, mounting groove;

[0032] 2, pole column;

[0033] 3, sealing ring;

[0034] 4, cover plate body; 41, second mounting hole;

[0035] 5, riveting block; 51, third mounting hole;

[0036] 6, plastic part; 61, fourth mounting hole. Detailed implementation manners

[0037] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The cover plate assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] like Figures 1 - 3 As shown, the cover plate assembly 100 according to the embodiment of the utility model includes an insulating member 1 and a pole 2 .

[0042] Among them, the insulating member 1 extends along the first direction and includes a first component 11 and a second component 12. The first component 11 and the second component 12 are clamped and connected at one end facing each other. The first component 11 and the second component 12 have first mounting holes 1111 that penetrate the insulating member 1 in the up and down directions at one end away from each other. There are two poles 2, and the two poles 2 are respectively penetrated through the two first mounting holes 1111.

[0043] Thus, by including the first component 11 and the second component 12 in the insulating part 1, one end of the first component 11 and the second component 12 facing each other is connected by snap connection, so that both the first component 11 and the second component 12 have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating part 1, and further making the center line of the pole column 2 collinear with the center line of the first mounting hole 1111, solving problems such as assembly offset and skew between the pole column 2 and the insulating part 1, and improving the qualification rate of the cover plate assembly 100. At the same time, by passing the two pole columns 2 through the two first mounting holes 1111 respectively, the fixation of the first component 11 and the second component 12 is further realized, and the stability and reliability of the overall structure of the cover plate assembly 100 are improved.

[0044] In addition, when the cover plate assembly 100 is applied to a battery cell, it effectively avoids the influence of the assembly offset and skew between the pole column 2 and the insulating part 1 on the outer insulating film of the pole group wrapping the battery cell from wrinkling or tearing, ensures the insulating performance inside the battery cell, and improves the safety of the battery cell applying the cover plate assembly 100.

[0045] Specifically, during the assembly of the cover plate assembly 100, first pass one of the pole columns 2 through the first mounting hole 1111 of one of the first component 11 and the second component 12, and then connect the first component 11 and the second component 12 by snap connection. After that, adjust the position of the first component 11 or the second component 12 where the pole column 2 is not passed through, so that the center line of the pole column 2 is collinear with the center line of the first mounting hole 1111, and then pass the other pole column 2 through the other first mounting hole 1111, thereby making the center lines of the two pole columns 2 collinear with the center lines of the two first mounting holes 1111 respectively.

[0046] It should be noted that the first direction is perpendicular to the up and down direction. In some embodiments, the up and down direction can be understood as the thickness direction of the cover plate assembly 100, the first direction can be understood as the length direction of the cover plate assembly 100, and the second direction can be understood as the width direction of the cover plate assembly 100. At the same time, the up and down direction is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. For example, when the cover plate assembly 100 is applied to a battery cell, the cover plate assembly 100 can be located on the upper side or the lower side of the pole group.

[0047] According to the cover plate assembly 100 of the embodiments of the present utility model, the insulating member 1 extends along a first direction and includes a first component 11 and a second component 12, which are connected by snap - fitting at the ends facing each other. The ends of the first component 11 and the second component 12 facing away from each other both have first mounting holes 1111 penetrating the insulating member 1 in the up - down direction, so that both the first component 11 and the second component 12 have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating member 1, and further enabling the center line of the pole column 2 to be collinear with the center line of the first mounting hole 1111, solving problems such as assembly offset and skew between the pole column 2 and the insulating member 1, and improving the qualification rate of the cover plate assembly 100 and the safety of the battery cell using the cover plate assembly 100.

[0048] In some embodiments of the present utility model, as Figures 1 - 9 shown, the first component 11 includes a first body portion 111 and a first fitting portion 112. The first fitting portion 112 is located at the end of the first body portion 111 facing the second component 12. The first fitting portion 112 has a protruding portion 1121 protruding towards the second component 12. The end of the second component 12 facing the first component 11 has a second fitting portion 122, and the second fitting portion 122 has a mounting groove 1224. The protruding portion 1121 is located in the mounting groove 1224 and is spaced apart from at least one inner wall of the mounting groove 1224 in the first direction.

[0049] Thus, by the protruding portion 1121 being located in the mounting groove 1224, the snap - fitting connection between the first component 11 and the second component 12 is realized, and the bottom wall of the protruding portion 1121 and the mounting groove 1224 is fitted in the up - down direction, thereby realizing the limitation of the first component 11 and the second component 12 in the up - down direction, facilitating the subsequent adjustment of the positional relationship between the first mounting hole 1111 and the pole column 2 in the first direction, and further reducing the assembly difficulty.

[0050] At the same time, by the protruding portion 1121 being spaced apart from at least one inner wall of the mounting groove 1224 in the first direction, both the first component 11 and the second component 12 have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating member 1, and further enabling the center line of the pole column 2 to be collinear with the center line of the first mounting hole 1111, solving problems such as assembly offset and skew between the pole column 2 and the insulating member 1.

[0051] Specifically, during the assembly of the cover plate assembly 100, first, one of the pole columns 2 is passed through the first mounting hole 1111 of the second component 12. Then, after the protruding portion 1121 is placed in the mounting groove 1224 to achieve the snap connection between the first component 11 and the second component 12, the positions of the first component 11 and the second component 12 are adjusted so that the center line of the pole column 2 is collinear with the center line of the first mounting hole 1111. After that, the other pole column 2 is passed through the first mounting hole 1111 of the first component 11, thereby making the center lines of the two pole columns 2 collinear with the center lines of the two first mounting holes 1111 respectively.

[0052] Furthermore, the second component 12 includes a second main body portion 121 and a second mating portion 122. The second mating portion 122 is located at one end of the second main body portion 121 facing the first component 11. The first mounting hole 1111 on the first component 11 is provided on the first main body portion 111, and the first mounting hole 1111 on the second component 12 is located on the second main body portion 121. Thus, the first mating portion 112 and the second mating portion 122 achieve the snap connection between the first component 11 and the second component 12, and the pole column 2 is passed through the first mounting hole 1111 to fix the first main body portion 111 and the second main body portion 121, further improving the reliability of the cover plate assembly 100.

[0053] In some embodiments of the present invention, such as Figure 3 and Figures 7 - 9 shown, in a cross-section perpendicular to the up-down direction, the protruding portion 1121 is an arc protruding towards the second component 12, and the mounting groove 1224 is an arc.

[0054] Thus, through such a setting, it is further realized that the protruding portion 1121 is located in the mounting groove 1224, improving the reliability. At the same time, when the protruding portion 1121 and the inner wall of the mounting groove 1224 close to the first component 11 along the first direction are in contact, the first component 11 and the second component 12 are in a locked state. By making the protruding portion 1121 an arc protruding towards the second component 12 and the mounting groove 1224 an arc in a cross-section perpendicular to the up-down direction, the mating area between the two is increased, further improving the reliability of the overall insulating part 1.

[0055] In some embodiments of the present invention, such as Figures 4 - 9As shown, the second mating portion 122 includes a first limiting rib 1221, a second limiting rib 1222, and a connecting portion 1223. The first limiting rib 1221 is located on the side of the second limiting rib 1222 close to the first component 11 and is spaced apart from the second limiting rib 1222. The two ends of the connecting portion 1223 in the first direction are respectively connected to the lower ends of the first limiting rib 1221 and the second limiting rib 1222. The first limiting rib 1221, the second limiting rib 1222, and the connecting portion 1223 form an installation groove 1224, and the lower surface of the protruding portion 1121 is attached to the upper surface of the connecting portion 1223.

[0056] Thus, the installation groove 1224 is defined by the first limiting rib 1221, the second limiting rib 1222, and the connecting portion 1223, and the lower surface of the protruding portion 1121 is attached to the upper surface of the connecting portion 1223, thereby restricting the positions of the first component 11 and the second component 12 in the up-and-down direction, facilitating the subsequent adjustment of the positional relationship between the first mounting hole 1111 and the pole column 2 in the first direction, further reducing the assembly difficulty, and improving the assembly efficiency of the cover plate assembly 100.

[0057] In some embodiments of the present invention, as Figure 6 shown, the upper end of the first limiting rib 1221 has a first guiding surface 12211, which slopes downward in the direction of the second component 12 towards the first component 11. It can be understood that during the assembly of the cover plate assembly 100, the protruding portion 1121 enters the installation groove 1224 downward. In the direction of the second component 12 towards the first component 11, due to the downward slope of the first guiding surface 12211, the first guiding surface 12211 plays a guiding and avoiding role, facilitating the entry of the protruding portion 1121 into the installation groove 1224, ensuring the snap connection between the first component 11 and the second component 12, and reducing the assembly difficulty and improving the assembly efficiency of the cover plate assembly 100.

[0058] In some embodiments of the present invention, as Figure 6 and Figure 9 shown, the lower end of the protruding portion 1121 has a second guiding surface 11211, which slopes upward in the direction of the first component 11 towards the second component 12. It can be understood that during the assembly of the cover plate assembly 100, the protruding portion 1121 enters the installation groove 1224 downward. In the direction of the first component 11 towards the second component 12, due to the upward slope of the second guiding surface 11211, the second guiding surface 11211 plays a guiding and avoiding role, facilitating the entry of the protruding portion 1121 into the installation groove 1224, ensuring the snap connection between the first component 11 and the second component 12, and reducing the assembly difficulty and improving the assembly efficiency of the cover plate assembly 100.

[0059] In some embodiments, as Figure 6and Figure 9 As shown, the upper end of the first limiting rib 1221 has a first guiding surface 12211, which slopes downward in the direction of the second component 12 towards the first component 11. The lower end of the protruding portion 1121 has a second guiding surface 11211, which slopes upward in the direction of the first component 11 towards the second component 12. Thus, when the protruding portion 1121 enters the installation groove 1224 downward, due to the first guiding surface 12211 sloping downward in the direction of the second component 12 towards the first component 11, the first guiding surface 12211 plays a role in guiding and avoiding, facilitating the entry of the protruding portion 1121 into the installation groove 1224. And due to the second guiding surface 11211 sloping upward in the direction of the first component 11 towards the second component 12, the second guiding surface 11211 plays a role in guiding and avoiding, facilitating the entry of the protruding portion 1121 into the installation groove 1224, ensuring the snap connection between the first component 11 and the second component 12, reducing the assembly difficulty, and improving the assembly efficiency of the cover plate assembly 100.

[0060] In some embodiments of the present utility model, as Figures 3 - 9 shown, the first mating portion 112 further includes adjusting ribs 1122. Among them, there are two adjusting ribs 1122 and they are elastic. Along the second direction, the two adjusting ribs 1122 are respectively located on both sides of the protruding portion 1121. One end of the protruding portion 1121 facing away from the second component 12 is respectively connected to the two adjusting ribs 1122, and the two adjusting ribs 1122 extend in directions away from each other. The first direction, the second direction, and the up-down direction are perpendicular to each other in pairs.

[0061] Thus, due to the elasticity of the adjusting ribs 1122, the dimensional influence of the insulating part 1 under thermal expansion and contraction can be further offset, so that both the first component 11 and the second component 12 have a certain adjustment space in the first direction, thereby realizing the coaxiality of the center line of the pole column 2 and the center line of the first mounting hole 1111, solving problems such as assembly offset and skew between the pole column 2 and the insulating part 1, and improving the qualification rate of the cover plate assembly 100.

[0062] Specifically, during the assembly of the cover plate assembly 100, first, one of the pole columns 2 is passed through the first mounting hole 1111 of the second component 12. Then, after the protruding portion 1121 is placed into the installation groove 1224 to achieve the snap connection between the first component 11 and the second component 12, the positions of the first component 11 and the second component 12 are adjusted so that the center line of the pole column 2 is collinear with the center line of the first mounting hole 1111. Then, the other pole column 2 is passed through the first mounting hole 1111 of the first component 11, thereby realizing the coaxiality of the center lines of the two pole columns 2 and the center lines of the two first mounting holes 1111 respectively.

[0063] At the same time, in the process of adjusting the position of the first component 11 and the second component 12 so that the center line of the pole 2 is collinear with the center line of the first mounting hole 1111 of the first component 11, due to the inconsistent size change of the insulating member 1, the first limiting rib 1221 of the protrusion 1121 is spaced apart or fitted along the first direction, and the adjusting rib 1122 has elasticity, so that the operator can apply a force away from the second component 12 to the first component 11 along the first direction to make the adjusting rib 1122 elastically deform, thereby ensuring that the center line of the pole 2 is collinear with the center line of the first mounting hole 1111 of the first component 11, and further ensuring that the center lines of the two poles 2 are collinear with the center lines of the two first mounting holes 1111 respectively.

[0064] In some embodiments of the present invention, Figures 3 - 9 As shown, the first matching portion 112 further includes a supporting rib 1123. There are two supporting ribs 1123 extending along the first direction, one end of the two supporting ribs 1123 is respectively connected to one end of the two adjusting ribs 1122 away from each other, and the other end is connected to the first body portion 111, and the first body portion 111 and the protruding portion 1121 are spaced apart along the first direction.

[0065] Thus, the structural strength of the first matching portion 112 is improved by the two supporting ribs 1123, and the structural strength and reliability of the snap-fit ​​connection between the first component 11 and the second component 12 are ensured, thereby improving the reliability of the cover assembly 100. At the same time, one end of the two supporting ribs 1123 is respectively connected to the ends of the two adjusting ribs 1122 that are away from each other, so that the structural strength of the adjusting ribs 1122 is ensured when the adjusting ribs 1122 are elastically deformed. In addition, the first body portion 111 and the protruding portion 1121 are spaced apart along the first direction to avoid interference between the first body portion 111 and the second matching portion 122, thereby ensuring smooth snap-fit ​​connection between the first component 11 and the second component 12, and improving reliability.

[0066] In some embodiments of the present invention, Figure 1 As shown, there is a sealing ring 3 between the pole 2 and the inner wall of the first mounting hole 1111. Therefore, by making the center line of the pole 2 and the center line of the first mounting hole 1111 colinear, the problem of the pole 2 and the insulating member 1 being offset and skewed during assembly is solved, thereby ensuring the sealing effect of the sealing ring 3 between the pole 2 and the inner wall of the first mounting hole 1111, further ensuring the sealing effect of the cover plate assembly 100, and improving reliability.

[0067] In some embodiments of the present invention, Figure 1As shown, the cover plate assembly 100 further includes a cover plate body 4. Among them, the cover plate body 4 has a second mounting hole 41 penetrating the cover plate body 4 in the up and down direction. At least one side of the cover plate body 4 in the up and down direction is provided with an insulating member 1, and the pole column 2 is inserted through the first mounting hole 1111 and the second mounting hole 41. Thus, the connection between the cover plate body 4 and the insulating member 1 is realized by inserting the pole column 2 through the first mounting hole 1111 and the second mounting hole 41. At the same time, by providing the insulating member 1 on at least one side of the cover plate body 4 in the up and down direction, the versatility of the cover plate assembly 100 is improved, so that the cover plate assembly 100 can be adapted to different types and models of battery cells.

[0068] Optionally, the cover plate body 4 is a light aluminum sheet.

[0069] In some embodiments, the cover plate assembly 100 further includes a riveting block 5. The riveting block 5 has a third mounting hole 51 penetrating the riveting block 5 in the up and down direction. The pole column 2 is inserted into the first mounting hole 1111, the second mounting hole 41, and the third mounting hole 51. There are two insulating members 1, one of which is located between the cover plate body 4 and the riveting block 5, and the other insulating member 1 is located between the cover plate body 4 and the electrode group.

[0070] In some embodiments, as Figure 1 shown, the cover plate assembly 100 further includes a riveting block 5 and two plastic parts 6. The riveting block 5 has a third mounting hole 51 penetrating the riveting block 5 in the up and down direction. The plastic part 6 has a fourth mounting hole 61 penetrating the plastic part 6 in the up and down direction. There is one insulating member 1 and it is located between the cover plate body 4 and the electrode group. The plastic parts 6 are located between the cover plate body 4 and the riveting block 5, and the two plastic parts 6 are spaced apart in the first direction. The pole column 2 is sequentially inserted into the first mounting hole 1111, the second mounting hole 41, the fourth mounting hole 61, and the third mounting hole 51.

[0071] In some embodiments of the present invention, as Figure 5 shown, the lower surface of the first component 11 is flush with the lower surface of the second component 12. Thus, by such a setting, the lower surface of the insulating member 1 is made flush, which is convenient for the assembly of the insulating member 1 and the component located below the insulating member 1, improves the assembly strength of the two, and reduces the assembly efficiency.

[0072] Furthermore, the cover plate body 4 is located below the insulating member 1. Thus, due to the lower surface of the insulating member 1 being flush, it is convenient for the pole column 2 to penetrate the first mounting hole 1111 and the second mounting hole 41, and reduces the gap between the cover plate body 4 and the insulating member 1, improving the reliability.

[0073] Next, the battery cell of the embodiment of the present invention will be described.

[0074] The battery cell according to the embodiment of the present invention includes a cover plate assembly 100.

[0075] According to the battery cell of the embodiment of the utility model, a cover plate assembly 100 is provided, and the insulating member 1 extends along a first direction and includes a first component 11 and a second component 12. The first component 11 and the second component 12 are connected by being snap-connected at one end facing each other, and the first component 11 and the second component 12 have a first mounting hole 1111 penetrating the insulating member 1 in the up-down direction at one end away from each other, so that the first component 11 and the second component 12 have a certain adjustment space in the first direction, thereby offsetting the influence of thermal expansion and contraction on the size of the insulating member 1, and further achieving the center line of the pole 2 to be colinear with the center line of the first mounting hole 1111, thereby solving the problem of assembly offset and skew of the pole 2 and the insulating member 1, and improving the safety of the battery cell.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that: include: An insulating member, the insulating member extending in a first direction and comprising a first component and a second component, the first component and the second component are connected by being clipped at one end facing each other, and the first component and the second component have a first mounting hole penetrating the insulating member in a vertical direction at one end facing away from each other; There are two poles, and the two poles are respectively penetrated through the two first mounting holes, and the first direction is perpendicular to the up-down direction.

2. The cover plate assembly according to claim 1, characterized in that: The first component includes a first main body portion and a first matching portion, the first matching portion is located at one end of the first main body portion facing the second component, the first mounting hole is located on the first main body portion, the first matching portion has a protrusion protruding toward the second component, the second component has a second matching portion at one end facing the first component, the second matching portion has a mounting groove, the protrusion is located in the mounting groove and is spaced apart from at least one inner wall of the mounting groove along the first direction.

3. The cover plate assembly according to claim 2, characterized in that: In a cross section perpendicular to the up-down direction, the protruding portion is in an arc shape protruding toward the second component, and the mounting groove is in an arc shape.

4. The cover plate assembly according to claim 2, characterized in that: The second matching portion includes a first limiting rib, a second limiting rib and a connecting portion, the first limiting rib is located on a side of the second limiting rib close to the first component and is spaced apart from the second limiting rib, the two ends of the connecting portion along the first direction are respectively connected to the lower end of the first limiting rib and the lower end of the second limiting rib, the first limiting rib, the second limiting rib and the connecting portion form the mounting groove, and the lower surface of the protrusion is fitted with the upper surface of the connecting portion.

5. The cover plate assembly according to claim 4, characterized in that: The upper end of the first limiting rib has a first guide surface, and in the direction from the second component to the first component, the first guide surface is inclined downward; And / or, the lower end of the protrusion has a second guide surface, and the second guide surface is inclined upward in the direction from the first component to the second component.

6. The cover plate assembly according to claim 4, characterized in that: The first matching portion further includes: There are two adjusting ribs and they are elastic. Along the second direction, the two adjusting ribs are respectively located on both sides of the protrusion. One end of the protrusion away from the second component is respectively connected to the two adjusting ribs. The two adjusting ribs extend in directions away from each other. The first direction, the second direction and the upper and lower directions are perpendicular.

7. The cover plate assembly according to claim 6, characterized in that: The first matching portion further includes: Support ribs, there are two support ribs extending along the first direction, one end of the two support ribs is respectively connected to one end of the two adjustment ribs facing away from each other, and the other end is connected to the first main body, and the first main body and the protrusion are spaced apart along the first direction.

8. The cover plate assembly according to claim 1, characterized in that: The lower surface of the first component is flush with the lower surface of the second component; And / or, a sealing ring is provided between the pole and the inner wall of the first mounting hole.

9. The cover plate assembly according to claim 1, characterized in that: Also includes: The cover body has a second mounting hole penetrating the cover body along the up-down direction, the insulating member is provided on at least one side of the cover body along the up-down direction, and the pole is passed through the first mounting hole and the second mounting hole.

10. A battery cell, characterized in that: Comprising a cover plate assembly according to any one of claims 1-9.

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