Lower plastic, cover structure and battery

Abstract

The present invention relates to the technical field of power batteries, and discloses a lower plastic, a cover plate structure and a battery. The lower plastic includes a central positioning area, an assembly connection area and an elastic adjustment part. The central positioning area has a pole mounting hole. The assembly connection area is arranged at the periphery of the central positioning area. An annular adjustment area is arranged between the assembly connection area and the central positioning area. The elastic adjustment part is arranged in the annular adjustment area. One side of the elastic adjustment part is connected to the central positioning area, and the other side is connected to the assembly connection area. The central positioning area of ​​the present application can be adaptively moved and adjusted in the annular adjustment area relative to the assembly connection area to adapt to changes in thermal expansion and contraction, ensure the position of the pole mounting hole, and improve the assembly accuracy between the pole and the lower plastic. The elastic adjustment part can elastically connect the central positioning area and the assembly connection area without affecting the adaptive movement of the central positioning area. The setting of the annular adjustment area makes the central positioning area have a wide adaptive adjustment range and high accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a lower plastic, a cover plate structure and a battery. Background Art

[0002] The cover structure of the power battery is a key component that plays the role of sealing, fixing and insulation. The cover structure includes a pole, an aluminum sheet and a lower plastic connected to the aluminum sheet. There are pole mounting holes on the aluminum sheet and the lower plastic for installing the pole. The pole is used for electrical connection between the battery cell and external electrical devices. When the cover structure is assembled as a whole, the pole passes through the lower plastic, the sealing ring and the pole mounting hole of the aluminum sheet in turn.

[0003] However, due to the influence of thermal expansion and contraction after the lower plastic is injection molded, the pole mounting holes on it will shift. When the cover structure is assembled, there will be alignment deviations between the pole and the pole mounting holes on the lower plastic, affecting the installation accuracy of the pole. At the same time, the thermal expansion and contraction during use will also pull the pole to become skewed, affecting the normal use function of the pole. Summary of the invention

[0004] In view of this, the present invention provides a lower plastic, a cover plate structure and a battery to solve the problem that the existing lower plastic is affected by thermal expansion and contraction, causing the pole mounting holes thereon to shift and pull the poles, affecting the pole installation accuracy and normal use function.

[0005] A first aspect of the present invention provides a lower plastic, comprising a central positioning area, an assembly connection area and an elastic adjustment portion, wherein the central positioning area has a pole mounting hole, the assembly connection area is arranged at the periphery of the central positioning area, and an annular adjustment area is arranged between the assembly connection area and the central positioning area, the elastic adjustment portion is arranged in the annular adjustment area, one side of the elastic adjustment portion is connected to the central positioning area, and the other side of the elastic adjustment portion is connected to the assembly connection area.

[0006] Beneficial effect: by setting an annular adjustment area between the assembly connection area and the central positioning area, and setting the elastic adjustment part in the annular adjustment area, one side of the elastic adjustment part is connected to the central positioning area, and the other side of the elastic adjustment part is connected to the assembly connection area, so that when the lower plastic produces thermal expansion and contraction, the central positioning area can be adaptively moved and adjusted relative to the assembly connection area in the annular adjustment area to adapt to the thermal expansion and contraction changes, ensure that the position of the pole mounting hole remains unchanged, and improve the assembly accuracy between the pole and the lower plastic. At the same time, the elastic adjustment part can realize elastic connection between the central positioning area and the assembly connection area without affecting the adaptive movement of the central positioning area, and the annular adjustment area can make the central positioning area move freely in the circumferential direction to adapt to the thermal expansion and contraction forces in all directions caused by thermal expansion and contraction, with a wide adjustment range and high accuracy.

[0007] In an optional embodiment, the elastic adjustment portion is an annular spring sheet arranged along the circumference of the central positioning area, and the annular spring sheet is matched and installed in the annular adjustment area.

[0008] Beneficial effect: The annular spring sheet arranged along the circumference of the central positioning area can increase the connection strength between the central positioning area and the assembly connection area, and in the process of adaptive movement of the central positioning area relative to the assembly connection area during thermal expansion and contraction, a part of the annular spring sheet is elastically compressed and the other part of the annular spring sheet is elastically stretched, thereby adaptively adapting to thermal expansion and contraction changes.

[0009] In an optional embodiment, the annular spring sheet has an annular bending portion, and the annular bending portion extends along the thickness direction of the central positioning area.

[0010] Beneficial effect: The annular bending portion can increase the elastic deformation capacity of the annular spring sheet. When thermal expansion and contraction occur, the bending angle of the annular bending portion of the elastically stretched part increases, and the bending angle of the annular bending portion of the elastically compressed part decreases, thereby playing an adaptive adjustment role.

[0011] In an optional embodiment, the elastic adjustment portion is configured as an elastic rib, and at least two of the elastic ribs are spaced apart along the circumference of the central positioning area.

[0012] Beneficial effects: The elastic connection between the central positioning area and the assembly connection area is achieved through at least two elastic ribs, thereby ensuring the connection strength and stability, and the elastic ribs require less material and are low in cost.

[0013] In an optional embodiment, the elastic rib is a Z-shaped rib, and the Z-shaped rib is extended along the circumference of the central positioning area.

[0014] Beneficial effects: The Z-shaped ribs can play a good elastic connection role for the central positioning area and the assembly connection area, and the Z-shaped ribs have good elastic deformation capabilities along the circumference of the central positioning area and along the length and width directions of the assembly connection area.

[0015] In an optional embodiment, the elastic rib includes a bending portion, and the bending portion extends along the thickness direction of the central positioning area.

[0016] Beneficial effect: The bending portion can increase the elastic deformation capacity of the elastic rib. When thermal expansion and contraction occur, the bending angle of the bending portion increases when the elastic rib is elastically stretched, and the bending angle of the bending portion decreases when the elastic rib is elastically compressed, thereby playing an adaptive adjustment role.

[0017] In an optional embodiment, the bending portion is configured to be at least one of a U-shape, a V-shape, a W-shape and a wave shape.

[0018] Beneficial effect: The shape of the bending portion can be set to at least one of U-shape, V-shape, W-shape and wave shape according to the requirements to meet various design requirements.

[0019] In an optional embodiment, the thickness h of the bending portion is less than or equal to the overall thickness H of the central positioning area and the assembly connection area.

[0020] Beneficial effect: The thickness h of the bending portion does not exceed the overall thickness H of the central positioning area and the assembly connection area, so that the thickness of the bending portion is within a reasonable range, avoiding the thickness of the bending portion being too large to affect the connection and assembly of the plastic with other components.

[0021] In an optional implementation, the angle α between two adjacent elastic ribs is 0°<α≤180°.

[0022] Beneficial effect: By setting the angle between two adjacent elastic ribs within a suitable range, the elastic ribs are arranged circumferentially along the central positioning area at a certain density, thereby ensuring the connection strength and stability.

[0023] The second aspect of the present invention provides a cover structure, including a pole, a cover body and the lower plastic of the present invention, the cover body is provided with a pole hole, the lower plastic is arranged on the lower surface of the cover body, and the pole hole and the pole mounting hole are arranged correspondingly, and the pole is installed in the pole hole and the pole mounting hole.

[0024] Beneficial effect: After the pole is installed in the pole hole and the pole mounting hole, when the lower plastic expands and contracts due to heat, the central positioning area can be adaptively moved and adjusted within the annular adjustment area relative to the assembly connection area to ensure the alignment accuracy of the pole hole and the pole mounting hole, thereby ensuring that the installation position of the pole is not offset due to thermal expansion and contraction.

[0025] In an optional embodiment, the cover plate structure further includes a sealing ring, which is sleeved on the outer circumference of the pole and is used to seal the gap between the pole and the pole hole.

[0026] Beneficial effects: The sealing ring can seal the gap between the pole and the pole hole to ensure the sealing performance of the cover structure. Since the central positioning area can be adaptively moved and adjusted within the annular adjustment area relative to the assembly connection area, it ensures that the installation position of the pole will not shift, solving the problem of poor sealing caused by the pole shift pulling the sealing ring.

[0027] A third aspect of the present invention provides a battery, comprising a pole group, a shell and the cover plate structure of the present invention, wherein the pole group is disposed in the shell, and the cover plate structure is sealed and connected to the shell.

[0028] Beneficial effect: When the lower plastic expands and contracts due to heat, the central positioning area can be adaptively moved and adjusted within the annular adjustment area relative to the assembly connection area to ensure the alignment accuracy of the pole hole and the pole mounting hole, thereby ensuring that the installation position of the pole is not offset by the influence of thermal expansion and contraction, and also avoiding the lower plastic from being displaced and skewed due to thermal expansion and contraction during installation, affecting the insulating film wrapped around the outside of the pole group, causing the insulating film to wrinkle and tear and affecting the internal insulation performance of the pole group. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of the lower plastic according to one embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 3 A top view of the lower plastic according to another embodiment of the present invention;

[0033] Figure 4 for Figure 3 Cross-sectional view of the middle BB;

[0034] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0035] Figure 6 This is a schematic diagram of the disassembled structure of a cover plate structure according to one embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the disassembled structure of a cover plate structure according to another embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Center positioning area; 11. Pole mounting hole; 2. Assembly connection area; 3. Annular adjustment area; 4. Annular spring; 5. Elastic rib; 51. Bending part; 10. Pole; 20. Cover body; 201. Pole hole; 30. Sealing ring; 40. Upper plastic; 50. Aluminum block; 60. Explosion-proof valve. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 5 As shown, according to an embodiment of the present invention, on the one hand, a lower plastic is disclosed, comprising a central positioning area 1, an assembly connection area 2 and an elastic adjustment portion, wherein the central positioning area 1 has a pole mounting hole 11, the assembly connection area 2 is arranged on the periphery of the central positioning area 1, and an annular adjustment area 3 is arranged between the assembly connection area 2 and the central positioning area 1, the elastic adjustment portion is arranged in the annular adjustment area 3, one side of the elastic adjustment portion is connected to the central positioning area 1, and the other side of the elastic adjustment portion is connected to the assembly connection area 2.

[0041] The lower plastic of this embodiment is provided with an annular adjustment area 3 between the assembly connection area 2 and the central positioning area 1, and the elastic adjustment part is provided in the annular adjustment area 3, one side of the elastic adjustment part is connected to the central positioning area 1, and the other side of the elastic adjustment part is connected to the assembly connection area 2, so that when the lower plastic generates thermal expansion and contraction, the central positioning area 1 can be adaptively moved and adjusted in the annular adjustment area 3 relative to the assembly connection area 2 to adapt to the thermal expansion and contraction changes, thereby ensuring that the position of the pole mounting hole 11 remains unchanged and improving the assembly accuracy between the pole 10 and the lower plastic. At the same time, the elastic adjustment part can realize elastic connection between the central positioning area 1 and the assembly connection area 2 without affecting the adaptive movement of the central positioning area 1, and the annular adjustment area 3 can enable the central positioning area 1 to move freely in the circumferential direction to adapt to the thermal expansion and contraction forces in all directions generated by the thermal expansion and contraction, with a wide adjustment range and high accuracy.

[0042] It can be understood that when the lower plastic produces thermal expansion and contraction along the length direction of the assembly connection area 2, the central positioning area 1 adaptively moves in the annular adjustment area 3 relative to the assembly connection area 2 along the length direction of the assembly connection area 2; when the lower plastic produces thermal expansion and contraction along the width direction of the assembly connection area 2, the central positioning area 1 adaptively moves in the annular adjustment area 3 relative to the assembly connection area 2 along the width direction of the assembly connection area 2; when the lower plastic produces thermal expansion and contraction along the length and width directions of the assembly connection area 2, the central positioning area 1 adaptively moves obliquely (oblique to the length and width directions of the assembly connection area 2) relative to the assembly connection area 2 in the annular adjustment area 3; when the lower plastic produces circumferential torsion due to thermal expansion and contraction, the central positioning area 1 can produce circumferential rotation relative to the assembly connection area 2 in the annular adjustment area 3 to adapt to the circumferential torsion caused by thermal expansion and contraction. Therefore, the annular adjustment area 3 provided in the present application can facilitate the free circumferential movement of the central positioning area 1 to adapt to various changes in thermal expansion and contraction.

[0043] In this embodiment, the central positioning area 1 is used to position the pole mounting hole 11. The central positioning area 1 can be a circular, elliptical or geometric area, etc. In this embodiment, the central positioning area 1 is set as a circular area for exemplary description. The pole mounting hole 11 is used to install the pole 10, and the pole mounting hole 11 is opened at the center of the central positioning area 1. The shape of the pole mounting hole 11 can be set according to the shape of the pole 10, and can be specifically set as a circular hole, an elliptical hole or a geometric hole. In this embodiment, the pole mounting hole 11 is set as a circular hole for exemplary description.

[0044] The assembly connection area 2 is used to connect the lower plastic to other structures.

[0045] In terms of the setting area, the area of ​​the central positioning area 1 is related to the size of the pole mounting hole 11. As long as the opening of the pole mounting hole 11 is met, the area of ​​the assembly connection area 2 should be much larger than the area of ​​the central positioning area 1 to improve the connection strength between the lower plastic and other structures.

[0046] There can be only one or two central positioning areas 1. When there is only one central positioning area 1, a corresponding pole mounting hole 11 is provided on the lower plastic to facilitate the installation of the positive pole 10 or the negative pole 10. When there are two central positioning areas 1, there are corresponding pole mounting holes 11 on the lower plastic to facilitate the installation of the positive pole 10 and the negative pole 10.

[0047] As for the specific formation of the annular adjustment area 3, a through hole can be machined on the assembly connection area 2, the size of the through hole is larger than the size of the central positioning area 1, the central positioning area 1 is arranged in the through hole, and the annular gap between the outer wall of the central positioning area 1 and the inner wall of the through hole is the annular adjustment area 3.

[0048] Of course, in some embodiments, the annular adjustment area 3 may also be directly machined between the central positioning area 1 and the assembly connection area 2 .

[0049] The specific size of the annular adjustment area 3 can be obtained through experiments. Specifically, the specific size of the annular adjustment area 3 is positively correlated with the degree of change of the thermal expansion and contraction of the lower plastic, and the degree of change of the thermal expansion and contraction of the lower plastic is positively correlated with the temperature difference of the environment in which it is located. Therefore, when the temperature difference of the environment in which it is located is large, the degree of thermal expansion and contraction of the lower plastic is greater, so the size of the corresponding annular adjustment area 3 is also set larger to adapt to the change of thermal expansion and contraction. Conversely, when the temperature difference of the environment in which it is located is small, the degree of thermal expansion and contraction of the lower plastic is smaller, so the size of the corresponding annular adjustment area 3 can be set smaller to adapt to the change of thermal expansion and contraction.

[0050] The elastic adjustment part is used to elastically connect the central positioning area 1 and the assembly connection area 2. During the adaptive movement of the central positioning area 1 relative to the assembly connection area 2, the elastic adjustment part is elastically stretched or compressed to adapt to the movement of the central positioning area 1.

[0051] In some embodiments, the elastic adjustment portion can be configured as an elastic rib 5, and at least two elastic ribs 5 are provided at intervals along the circumference of the central positioning area 1. The elastic connection between the central positioning area 1 and the assembly connection area 2 is achieved by at least two elastic ribs 5, ensuring the connection strength and stability, and the elastic ribs 5 are provided with less material and low cost.

[0052] Specifically, the elastic ribs 5 are preferably arranged at equal intervals along the circumference of the central positioning area 1 to improve the force uniformity and connection stability between the central positioning area 1 and the assembly connection area 2. Two, four, or six elastic ribs 5 can be arranged at equal intervals along the circumference of the central positioning area 1.

[0053] For setting the shape, Figure 1 and Figure 2 As shown, the elastic rib 5 can be set as a Z-shaped rib, and the Z-shaped rib is extended along the circumference of the central positioning area 1. The Z-shaped rib can play a good elastic connection role between the central positioning area 1 and the assembly connection area 2, and the Z-shaped rib has good elastic deformation ability along the circumference of the central positioning area 1 and along the length and width of the assembly connection area 2.

[0054] Of course, in some specific implementations, such as Figure 3 , Figure 4 and Figure 5 As shown, the elastic rib 5 may further include a bending portion 51, which extends along the thickness direction of the central positioning area 1. The bending portion 51 can increase the elastic deformation capacity of the elastic rib 5. When thermal expansion and contraction occur, the bending angle of the bending portion 51 increases when the elastic rib 5 is elastically stretched, and the bending angle of the bending portion 51 decreases when the elastic rib 5 is elastically compressed, thereby playing a role of adaptive adjustment.

[0055] In terms of specific shape, the bending portion 51 is set to at least one of U-shape, V-shape, W-shape and wavy shape. The shape of the bending portion 51 can be set to at least one of U-shape, V-shape, W-shape and wavy shape according to requirements to meet diverse design requirements.

[0056] Specifically, the bending portions 51 can all be set to one of the shapes of U-shape, V-shape, W-shape or wave shape; or, according to needs, part of the bending portions 51 can be selectively set to U-shape, part of the bending portions 51 can be selectively set to V-shape, part of the bending portions 51 can be selectively set to W-shape, and part of the bending portions 51 can be selectively set to wave shape; or the bending portions 51 can be set to a combination of any other two or more shapes among U-shape, V-shape, W-shape or wave shape.

[0057] like Figure 5 As shown, preferably, the thickness h of the bending portion 51 is less than or equal to the overall thickness H of the central positioning area 1 and the assembly connection area 2. That is, the thickness h of the bending portion 51 never exceeds the overall thickness H of the central positioning area 1 and the assembly connection area 2, so that the thickness of the bending portion 51 is within a reasonable range, and the thickness of the bending portion 51 is not too large to affect the connection and assembly of the plastic and other components.

[0058] Specifically, the thickness h of the bending portion 51 can be set to be smaller than the overall thickness H of the central positioning area 1 and the assembly connection area 2 , or can be set to be equal to the overall thickness H of the central positioning area 1 and the assembly connection area 2 .

[0059] like Figure 3 As shown, the angle α between two adjacent elastic ribs 5 is 0°<α≤180°. By setting the angle between two adjacent elastic ribs 5 within a suitable range, the elastic ribs 5 are arranged circumferentially along the central positioning area 1 at a certain density, thereby ensuring connection strength and stability.

[0060] In addition, if Figure 3 and Figure 4As shown, in some embodiments, the elastic adjustment portion can also be configured as an annular spring piece 4 arranged along the circumference of the central positioning area 1, and the annular spring piece 4 is matched and installed in the annular adjustment area 3. The annular spring piece 4 arranged along the circumference of the central positioning area 1 can increase the connection strength between the central positioning area 1 and the assembly connection area 2, and in the process of adaptive movement of the central positioning area 1 relative to the assembly connection area 2 during thermal expansion and contraction, a part of the annular spring piece 4 is elastically compressed, and another part of the annular spring piece 4 is elastically stretched, thereby adaptively adapting to thermal expansion and contraction changes.

[0061] Furthermore, the annular spring piece 4 has an annular bending portion, which extends in the thickness direction of the central positioning area 1. The annular bending portion can increase the elastic deformation capacity of the annular spring piece 4. When thermal expansion and contraction occur, the bending angle of the annular bending portion of the elastically stretched portion increases, and the bending angle of the annular bending portion of the elastically compressed portion decreases, thereby playing a role of adaptive adjustment.

[0062] The annular bending portion can be bent upward or downward along the thickness direction of the central positioning area 1, and the cross-sectional shape of the bending portion can be U-shaped, V-shaped, W-shaped, etc., which is not specifically limited in this embodiment.

[0063] According to an embodiment of the present invention, on the other hand, Figure 6 or Figure 7 As shown, a cover structure is also disclosed, including a pole 10, a cover body 20 and the lower plastic of this embodiment, the cover body 20 is provided with a pole hole 201, the lower plastic is arranged on the lower surface of the cover body 20, and the pole hole 201 and the pole mounting hole 11 are arranged correspondingly, and the pole 10 is installed in the pole hole 201 and the pole mounting hole 11.

[0064] In the cover plate structure of the present embodiment, after the pole 10 is installed in the pole hole 201 and the pole mounting hole 11, when the lower plastic undergoes thermal expansion and contraction, the central positioning area 1 can be adaptively moved and adjusted relative to the assembly connection area 2 in the annular adjustment area 3 to ensure the alignment accuracy of the pole hole 201 and the pole mounting hole 11, thereby ensuring that the installation position of the pole 10 is not offset by the influence of thermal expansion and contraction.

[0065] like Figure 6 As shown, the pole 10 may include only the positive pole 10 or the negative pole 10. In this case, only the positive pole 10 or the negative pole 10 is arranged on the cover body 20, and only one pole mounting hole 11 is arranged on the corresponding lower plastic. In this case, the elastic adjustment portion can be arranged as an elastic rib 5 as needed, and the elastic rib 5 can be specifically arranged as a Z-shaped rib. Of course, in other embodiments, the elastic adjustment portion can also be arranged in the form of an annular spring sheet 4.

[0066] like Figure 7As shown, the pole 10 may also include a positive pole 10 and a negative pole 10, both of which are integrated on the cover body 20, and two pole mounting holes 11 are provided on the corresponding lower plastic, at which time one of the elastic adjustment parts can be provided as an elastic rib 5 as needed, and the elastic rib 5 can be specifically as follows Figure 7 In the U-shape shown, another elastic adjustment portion can be configured as an annular spring sheet 4 as required.

[0067] Specifically, the lower plastic is connected and fixed to the lower surface of the cover body 20 through the assembly connection area 2, which is used to insulate the pole 10 and the lower surface of the cover body 20. The central positioning area 1 is set corresponding to the pole hole 201 of the cover, and the pole hole 201 and the pole mounting hole 11 are concentrically set to ensure the installation position of the pole 10.

[0068] The cover body 20 may specifically be an aluminum sheet.

[0069] Furthermore, the cover plate structure further includes a sealing ring 30, which is sleeved on the outer periphery of the pole 10 and is used to seal the gap between the pole 10 and the pole hole 201. The sealing ring 30 can seal the gap between the pole 10 and the pole hole 201 to ensure the sealing performance of the cover plate structure, and because the central positioning area 1 can be adaptively moved and adjusted relative to the assembly connection area 2 in the annular adjustment area 3, it is ensured that the installation position of the pole 10 will not be offset, and the problem of poor sealing caused by the offset of the pole 10 pulling the sealing ring 30 is solved.

[0070] In addition, the cover structure also includes an upper plastic 40, an aluminum block 50 and an explosion-proof valve 60, wherein the upper plastic 40 is arranged on the upper surface of the cover body 20, and is used to insulate the pole 10 and the upper surface of the cover body 20, the aluminum block 50 is sleeved on the outer periphery of the pole 10 and is arranged on the upper surface of the upper plastic 40, the aluminum block 50 is used to divert the current of the pole 10 to the outside, and the explosion-proof valve 60 is arranged in the explosion-proof mounting hole of the cover body 20, which is a protective structure of the cover structure.

[0071] Since the upper plastic 40 , the aluminum block 50 and the explosion-proof valve 60 are all prior art, they will not be described in detail in this embodiment.

[0072] According to an embodiment of the present invention, in another aspect, a battery is disclosed, including a pole group, a shell and a cover plate structure of this embodiment, wherein the pole group is disposed in the shell, and the cover plate structure is sealed and connected to the shell.

[0073] In the battery of this embodiment, when the lower plastic undergoes thermal expansion and contraction, the central positioning area 1 can be adaptively moved and adjusted relative to the assembly connection area 2 in the annular adjustment area 3 to ensure the alignment accuracy of the pole hole 201 and the pole mounting hole 11, thereby ensuring that the installation position of the pole 10 is not offset by thermal expansion and contraction, and also avoiding the lower plastic from being displaced and skewed due to thermal expansion and contraction during installation, affecting the insulating film wrapped around the outside of the pole group, causing the insulating film to wrinkle and tear and affecting the internal insulation performance of the pole group.

[0074] 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 appended claims.

Claims

1. A lower plastic, characterized in that: include: A central positioning area having a pole mounting hole; An assembly connection area is arranged along the circumference of the central positioning area, and a hollow annular adjustment area is arranged between the assembly connection area and the central positioning area, and the annular adjustment area is arranged in an annular manner along the circumference of the central positioning area; An elastic adjustment portion is arranged in the annular adjustment area, one side of the elastic adjustment portion is connected to the central positioning area, and the other side of the elastic adjustment portion is connected to the assembly connection area; The elastic adjustment portion is configured as an elastic rib, and at least two of the elastic ribs are spaced apart along the circumference of the central positioning area.

2. The lower plastic according to claim 1, characterized in that: The elastic ribs are Z-shaped ribs, and the Z-shaped ribs are extended along the circumference of the central positioning area.

3. The lower plastic according to claim 2, characterized in that: The elastic rib includes a bending portion, and the bending portion extends along a thickness direction of the central positioning area.

4. The lower plastic according to claim 3, characterized in that: The bending portion is configured to be in at least one of a U-shape, a V-shape, a W-shape and a wave shape.

5. The lower plastic according to claim 3 or 4, characterized in that: The thickness h of the bending portion is less than or equal to the overall thickness H of the central positioning area and the assembly connection area.

6. The lower plastic according to any one of claims 1 to 4, characterized in that: The angle α between two adjacent elastic ribs is 0°<α≤180°.

7. A cover plate structure, characterized in that: include: Pole; The cover body is provided with a pole hole; The lower plastic according to any one of claims 1 to 6 is arranged on the lower surface of the cover body, and the pole hole and the pole mounting hole are arranged correspondingly, and the pole is installed in the pole hole and the pole mounting hole.

8. The cover plate structure according to claim 7, characterized in that: It also includes a sealing ring, which is sleeved on the outer circumference of the pole and is used to seal the gap between the pole and the pole hole.

9. A battery, characterized in that: include: Pole group; a shell, wherein the pole group is arranged in the shell; The cover plate structure according to claim 7 or 8 is sealed and connected to the shell.

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