Secondary short circuit prevention structure with rubber-coated post terminal and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a secondary short circuit prevention structure with a rubber-coated pole, which comprises a shell, a pole and a first insulating part. A through hole is formed in the shell, the pole comprises an inserting part and a connecting part which are connected in the axial direction of the pole, the inserting part is inserted in the through hole, a positioning groove is annularly formed in the side wall of the inserting part in the axial direction of the pole, and the connecting part is located on the first side of the shell. The first insulating part is formed through a rubber coating process, part of the first insulating part is inserted into the positioning groove, part of the first insulating part wraps the surface of the second side of the shell, the first side and the second side are oppositely arranged, and part of the first insulating part is clamped between the side wall of the inserting part and the inner wall of the through hole. A first high-temperature-resistant insulating layer is arranged on the side wall of the pole, and / or a second high-temperature-resistant insulating layer is arranged on the surface, facing the pole, of the shell. The utility model also provides a battery, which comprises a battery cell and the secondary short circuit prevention structure with the rubber-coated post terminal, and the battery cell is positioned in the shell. The battery is helpful for preventing secondary short circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, and in particular to a secondary short circuit prevention structure with a rubber-coated pole and a battery. Background Art

[0002] Once thermal runaway (such as short circuit) occurs in the battery cells inside the new energy battery, high heat will be generated. When the high heat is transferred to the pole, the outer plastic and / or inner plastic will melt, which may cause the positive and negative poles to short-circuit, causing a secondary short circuit. Utility Model Content

[0003] One purpose of the utility model is to provide a secondary short circuit prevention structure with a rubber-coated pole, which can help prevent secondary short circuits.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] Provided is a secondary short circuit prevention structure with a rubber-coated pole, comprising:

[0006] A shell, wherein a through hole is formed in the shell;

[0007] A pole, the pole comprising an inserting portion and a connecting portion connected along its own axial direction, the inserting portion being inserted into the through hole, a positioning groove being formed in a ring on a side wall of the inserting portion along its own axial direction, and the connecting portion being located on a first side of the housing;

[0008] a first insulating member, the first insulating member being formed by a rubber encapsulation process, the first insulating member being partially inserted into the positioning groove and partially covering the surface of the second side of the housing, the first side being disposed opposite to the second side, and the first insulating member being partially sandwiched between a side wall of the insertion portion and an inner wall of the through hole;

[0009] A first high-temperature resistant insulation layer is provided on the side wall of the pole, and / or a second high-temperature resistant insulation layer is provided on the surface of the shell facing the pole.

[0010] Optionally, the first high-temperature resistant insulation layer includes a first-region high-temperature resistant insulation layer, and the first-region high-temperature resistant insulation layer is located on a side wall of the insertion portion;

[0011] And / or, along a first direction, the maximum dimension of the connecting portion is greater than the maximum dimension of the through hole, the first direction is perpendicular to the axial direction of the pole, the first high-temperature resistant insulating layer includes a second region of high-temperature resistant insulating layer, and the second region of high-temperature resistant insulating layer is located on a first end surface of the connecting portion facing the insertion portion;

[0012] And / or, the first high-temperature resistant insulation layer includes a third-region high-temperature resistant insulation layer, and the third-region high-temperature resistant insulation layer is located on the side wall of the connecting portion.

[0013] Optionally, the second high-temperature resistant insulation layer includes a fourth-region high-temperature resistant insulation layer, and the fourth-region high-temperature resistant insulation layer is located on the surface of the second side of the housing around the through hole.

[0014] Optionally, a positioning ring is convexly provided on the surface of the second side of the housing, the positioning ring is located around the through hole, and the positioning ring is inserted into the positioning groove of the first insulating member;

[0015] The fourth zone high temperature resistant insulation layer is located on the second end face of the positioning ring, and / or the fourth zone high temperature resistant insulation layer is located on the inner ring wall surface of the positioning ring, and / or the fourth zone high temperature resistant insulation layer is located on the surface of the second side of the outer shell inside the positioning ring.

[0016] Optionally, the second high-temperature resistant insulation layer includes a fifth-region high-temperature resistant insulation layer, and the fifth-region high-temperature resistant insulation layer is located on the inner wall of the through hole.

[0017] Optionally, the second high-temperature resistant insulation layer includes a sixth-region high-temperature resistant insulation layer, and the sixth-region high-temperature resistant insulation layer is located on the surface of the first side of the housing around the through hole.

[0018] Optionally, a relief groove is formed on the surface of the first side of the housing, the through hole is located at the bottom of the relief groove, the relief groove and the connecting portion are coaxially arranged, and along a first direction, the maximum dimension of the connecting portion is smaller than the maximum dimension of the bottom of the relief groove, and the first direction is perpendicular to the axial direction of the pole;

[0019] The sixth zone high temperature resistant insulation layer is located at the bottom of the avoidance groove, and / or the sixth zone high temperature resistant insulation layer is located on the side wall of the avoidance groove.

[0020] Optionally, a sealing ring is further included, which is sleeved on the insertion portion and clamped between the first end surface of the connecting portion facing the insertion portion and the outer shell.

[0021] Optionally, a second insulating member is further included, the second insulating member is attached to the surface of the first side of the shell, and the second insulating member is partially sandwiched between the first end surface of the connecting portion facing the insertion portion and the shell.

[0022] Another object of the present invention is to provide a battery that can help prevent secondary short circuits.

[0023] To achieve this purpose, the present invention adopts the following technical solutions:

[0024] A battery is provided, comprising a battery core and the above-mentioned secondary short circuit prevention structure with a rubber-coated pole, wherein the battery core is located in the housing.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides a secondary short circuit prevention structure with a rubber-coated pole, comprising a shell, a pole and a first insulating member. A through hole is provided on the shell, and the pole comprises an inserting portion and a connecting portion connected along its own axial direction. The inserting portion is inserted into the through hole, and the side wall of the inserting portion is provided with a positioning groove along its own axial ring. The connecting portion is located on the first side of the shell. The first insulating member is formed by a rubber coating process. The first insulating member is partially inserted into the positioning groove and partially covered on the surface of the second side of the shell. The first side and the second side are arranged opposite to each other, and the first insulating member is partially sandwiched between the side wall of the inserting portion and the inner wall of the through hole. The side wall of the pole has a first high-temperature resistant insulating layer, and / or the surface of the shell facing the pole has a second high-temperature resistant insulating layer. When the temperature inside the battery is very high, the first insulating member may melt and fail, but the first high-temperature resistant insulating layer and / or the second high-temperature resistant insulating layer help prevent the pole from contacting the shell, thereby preventing secondary short circuits and improving safety.

[0027] The utility model also provides a battery comprising a battery cell and the aforementioned secondary short circuit prevention structure with a rubber-coated terminal, wherein the battery cell is located within a housing. The battery can help prevent secondary short circuits and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of a secondary short circuit prevention structure with a rubber-coated pole provided by an embodiment of the utility model;

[0029] Figure 2 The explosion prevention structure of the secondary short circuit with the rubber-coated pole provided by the embodiment of the utility model is Figure 1 ;

[0030] Figure 3 The explosion prevention structure of the secondary short circuit with the rubber-coated pole provided by the embodiment of the utility model is Figure 2 ;

[0031] Figure 4 This is a cross-sectional view of a secondary short circuit prevention structure (including a first high-temperature resistant insulation layer) with a rubber-coated pole provided by an embodiment of the present utility model;

[0032] Figure 5 It is a cross-sectional view of a secondary short circuit prevention structure (including a second high-temperature resistant insulation layer) with a rubber-coated pole provided by an embodiment of the present utility model.

[0033] In the picture:

[0034] 1. Cover plate; 11. Through hole; 12. Positioning ring; 121. Second end surface; 13. High-temperature resistant insulation layer in the fourth zone; 14. High-temperature resistant insulation layer in the fifth zone; 15. Avoidance groove; 16. High-temperature resistant insulation layer in the sixth zone;

[0035] 2. Pole; 21. Insertion portion; 211. Positioning groove; 212. First zone high-temperature resistant insulation layer; 22. Connecting portion; 221. First end surface; 2211. Second zone high-temperature resistant insulation layer; 222. Third zone high-temperature resistant insulation layer;

[0036] 3. First insulating member; 31. Positioning groove;

[0037] 4. Sealing ring; 5. Second insulating part. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention, and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or 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 the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] Once thermal runaway (such as short circuit) occurs in the battery cells inside the new energy battery, high heat will be generated. When the high heat is transferred to the pole, the outer plastic and / or inner plastic will melt, which may cause the positive and negative poles to short-circuit, causing a secondary short circuit.

[0042] This embodiment provides a secondary short circuit prevention structure with a rubber-coated pole, which helps prevent secondary short circuits in batteries with rubber-coated poles and improves their safety performance.

[0043] like Figure 1-Figure 5 As shown, the secondary short circuit prevention structure with a rubber-coated pole in this embodiment includes a shell, a pole 2 and a first insulating member 3. A through hole 11 is provided on the shell, and the pole 2 includes an inserting portion 21 and a connecting portion 22 connected along its own axial direction. The inserting portion 21 is inserted into the through hole 11, and the side wall of the inserting portion 21 is provided with a positioning groove 211 along its own axial ring. The connecting portion 22 is located on the first side of the shell. The first insulating member 3 is formed by a rubber coating process. The first insulating member 3 is partially inserted into the positioning groove 211 and partially coated on the surface of the second side of the shell. The first side and the second side are arranged opposite to each other, and the first side is partially sandwiched between the side wall of the inserting portion 21 and the inner wall of the through hole 11. Optionally, the inserting portion 21 is cylindrical, the through hole 11 is circular, the diameter of the inserting portion 21 is smaller than the diameter of the through hole 11, and the end of the inserting portion 21 is fixed to the first side of the shell by rubber coating of the first insulating member 3. A first high-temperature resistant insulation layer is provided on the side wall of the pole 2 , and / or a second high-temperature resistant insulation layer is provided on the surface of the housing facing the pole 2 .

[0044] When the internal temperature of the battery is very high, the first insulating member 3 may melt and fail, but the first high-temperature resistant insulating layer and / or the second high-temperature resistant insulating layer help prevent the pole 2 from contacting the shell, thereby preventing secondary short circuit and improving safety.

[0045] like Figure 4 As shown, the first high-temperature-resistant insulating layer optionally includes a first-zone high-temperature-resistant insulating layer 212. The first-zone high-temperature-resistant insulating layer 212 is located on the sidewalls of the insertion portion 21 to prevent the sidewalls of the insertion portion 21 from contacting the housing in high-temperature environments and causing a secondary short circuit. The bottom and sidewalls of the positioning groove 211 are both provided with a high-temperature-resistant insulating layer. Along the axial direction of the pole 2, the sidewalls of the insertion portion 21 on both sides of the positioning groove 211 are also provided with a high-temperature-resistant insulating layer.

[0046] Optionally, an upper edge of a side wall of the positioning groove 211 close to the connecting portion 22 is provided with a chamfer, and a high-temperature resistant insulating layer is also provided on the chamfered surface.

[0047] Optionally, along the first direction, the maximum dimension of the connecting portion 22 is greater than the maximum dimension of the through hole 11, the first direction is perpendicular to the axial direction of the pole 2, the first high-temperature resistant insulation layer includes a second-zone high-temperature resistant insulation layer 2211, and the second-zone high-temperature resistant insulation layer 2211 is located on the first end face 221 of the connecting portion 22 facing the insertion portion 21 to prevent the first end face 221 of the connecting portion 22 from contacting the outer shell in a high-temperature environment, causing a secondary short circuit.

[0048] Optionally, the first high temperature resistant insulation layer includes a third area high temperature resistant insulation layer 222, which is located on the side wall of the connecting part 22 to prevent the side wall of the connecting part 22 from contacting the shell in a high temperature environment, causing a secondary short circuit.

[0049] Optionally, the first region high temperature resistant insulation layer 212, the second region high temperature resistant insulation layer 2211, and the third region high temperature resistant insulation layer 222 are connected in sequence, with no gaps between adjacent regions to avoid secondary short circuits at the connections between the regions.

[0050] like Figure 5 As shown, optionally, the second high temperature resistant insulation layer includes a fourth region high temperature resistant insulation layer 13 , and the fourth region high temperature resistant insulation layer 13 is located on the surface of the second side of the housing around the through hole 11 .

[0051] Further optionally, in order to prevent the first insulating member 3 from being displaced relative to the cover plate 1 in the radial direction of the pole 2, so that the relative position of the pole 2 and the shell in the radial direction of the pole 2 changes, a positioning ring 12 is protruded on the surface of the second side of the shell. The positioning ring 12 is located around the through hole 11 and is inserted into the positioning groove 31 of the first insulating member 3, thereby further ensuring that the relative position between the pole 2 and the shell is fixed.

[0052] Optionally, the fourth zone high-temperature-resistant insulating layer 13 is located on the second end surface 121 of the positioning ring 12. The second end surface 121 protrudes from the surface of the second side of the housing. In a high-temperature environment, if the first insulating member 3 melts and fails, the pole 2 is tilted by force and easily contacts the second end surface 121, causing a secondary short circuit. Providing the fourth zone high-temperature-resistant insulating layer 13 on the second end surface 121 prevents the second end surface 121 from contacting the pole 2.

[0053] Since the inner wall of the positioning ring 12 faces the pole 2, the inclination of the pole 2 or the bending deformation of the outer shell may easily cause the inner wall of the positioning ring 12 to contact and short-circuit with the pole 2. Therefore, the fourth zone high-temperature resistant insulation layer 13 is optionally located on the inner wall of the positioning ring 12.

[0054] Optionally, the fourth region high temperature resistant insulating layer 13 is located on the surface of the second side of the shell inside the positioning ring 12 . This region is closer to the pole 2 and is more likely to come into contact with the pole 2 and cause a short circuit.

[0055] Optionally, the second high-temperature-resistant insulating layer includes a fifth-area high-temperature-resistant insulating layer 14, which is located on the inner wall of the through hole 11 to prevent the inner wall of the through hole 11 from contacting the pole 2 in a high-temperature environment and causing a secondary short circuit. Optionally, a chamfer is provided on the edge of the through hole 11 at one end away from the connection portion 22, and a high-temperature-resistant insulating layer is also provided on the chamfered surface to prevent the chamfered surface from contacting the pole 2 and causing a secondary short circuit.

[0056] Optionally, the second high temperature resistant insulation layer includes a sixth region high temperature resistant insulation layer 16 , and the sixth region high temperature resistant insulation layer 16 is located on the surface of the first side of the housing around the through hole 11 .

[0057] Optionally, a avoidance groove 15 is provided on the surface of the first side of the housing, and the through hole 11 is located at the bottom of the avoidance groove 15. The avoidance groove 15 is coaxially arranged with the connecting portion 22. Along the first direction, the maximum dimension of the connecting portion 22 is smaller than the maximum dimension of the bottom of the avoidance groove 15, and the first direction is perpendicular to the axial direction of the pole 2. Therefore, the bottom and side walls of the avoidance groove 15 are both facing the connecting portion 22. Optionally, the sixth zone high-temperature resistant insulation layer 16 is located at the bottom of the avoidance groove 15 to prevent the bottom of the avoidance groove 15 from contacting the connecting portion 22 and causing a secondary short circuit. Optionally, the sixth zone high-temperature resistant insulation layer 16 is located on the side walls of the avoidance groove 15 to prevent the side walls of the avoidance groove 15 from contacting the connecting portion 22 and causing a secondary short circuit.

[0058] Optionally, the opening edge of the avoidance groove 15 is set to a curved transition to prevent scratching the pole 2 or the battery cell. A high-temperature resistant insulating layer is also provided on the transition surface here to ensure that it will not contact the pole 2 and cause a secondary short circuit.

[0059] Optionally, the fourth region high temperature resistant insulation layer 13, the fifth region high temperature resistant insulation layer 14, and the sixth region high temperature resistant insulation layer 16 are connected in sequence, with no gaps between adjacent regions to avoid secondary short circuits being easily formed at the connections between the regions.

[0060] In some embodiments, the first high-temperature-resistant insulation layer is provided only on the pole 2, and the second high-temperature-resistant insulation layer is not provided on the outer shell. In other embodiments, the second high-temperature-resistant insulation layer is provided only on the outer shell, and the first high-temperature-resistant insulation layer is not provided on the pole 2. In still other embodiments, both the first high-temperature-resistant insulation layer is provided on the pole 2 and the second high-temperature-resistant insulation layer is provided on the outer shell.

[0061] Optionally, the thickness of the first high-temperature resistant insulating layer is greater than 0.01 mm. Optionally, the thickness of the second high-temperature resistant insulating layer is greater than 0.01 mm. If the thickness of the high-temperature resistant insulating layer is too low, it will affect the insulation effect. The upper limit of the thickness depends on the spatial design of the battery to balance the energy density and safety performance.

[0062] Optionally, the first high-temperature resistant insulating layer is an aluminum oxide layer formed by electroplating, and optionally, the second high-temperature resistant insulating layer is an aluminum oxide layer formed by electroplating. Aluminum oxide has good insulation properties and is resistant to high temperatures. The aluminum oxide layer formed by electroplating can ensure structural strength and connection strength.

[0063] Optionally, the secondary short circuit prevention structure with the rubber-coated pole also includes a sealing ring 4, which is sleeved on the insertion part 21. The sealing ring 4 is clamped between the first end face 221 of the connecting part 22 facing the insertion part 21 and the outer shell to seal the gap between the insertion part and the through hole 11 to ensure that the inside of the battery is in a sealed state.

[0064] Optionally, the secondary short-circuit prevention structure with a rubber-coated pole further includes a second insulating member 5, which is attached to the surface of the first side of the housing and partially sandwiched between the first end face 221 of the connecting portion 22 facing the insertion portion 21 and the housing. Optionally, the second insulating member 5 is partially sandwiched between the connecting portion 22 and the bottom of the avoidance groove 15, and partially sandwiched between the connecting portion 22 and the sidewalls of the avoidance groove 15. While providing insulation, it also fixes the position of the connecting portion 22 relative to the housing, preventing the pole 2 from shaking radially relative to the through hole 11.

[0065] Optionally, in this embodiment, the first insulating member 3 is made of outer plastic, and the second insulating member 5 is made of inner plastic. Optionally, the inner ring of the positioning groove 31 of the first insulating member 3 is toothed to prevent the first insulating member 3 from rotating relative to the cover 1, and the outward end surface of the first insulating member 3 has an identification protrusion, which can be provided with a positive or negative pole mark for easy identification. Optionally, the cross-section of the connecting portion 22 is a square with missing corners to prevent the pole 2 from rotating relative to the second insulating member 5. Since the second insulating member 5 is fixed relative to the outer shell, the pole 2 is guaranteed not to rotate relative to the outer shell.

[0066] Optionally, the housing includes a cover plate 1 and a shell, with the pole 2 inserted into the through-hole 11 of the cover plate 1, or the pole 2 inserted into the through-hole 11 of the shell. In this embodiment, the pole 2 is inserted into the through-hole 11 of the cover plate 1. Optionally, a first high-temperature resistant insulation layer may be provided on the positive pole, or on the negative pole, or on the positive pole and the negative pole. Optionally, a second high-temperature resistant insulation layer may be provided on the cover plate 1 or shell near the positive pole, or on the negative pole, or on the positive pole and the negative pole. The pole 2 provided with the first high-temperature resistant insulation layer and the cover plate 1 or shell provided with the second high-temperature resistant insulation layer may both be located at the connection position of the same pole, or at the connection positions of different poles.

[0067] It is known that the end surface of the insertion portion 21 of the pole 2 away from the connecting portion 22 and the end surface of the connecting portion 22 away from the insertion portion 21 both need to ensure conductivity, and therefore cannot be electroplated with a high-temperature resistant insulating layer.

[0068] This embodiment also provides a battery comprising a cell and the aforementioned secondary short-circuit prevention structure with a rubber-coated terminal, wherein the cell is located within a housing. Optionally, in this embodiment, the battery is a prismatic cell, although in other embodiments, a cylindrical cell is also possible. This battery can help prevent secondary short circuits and improve safety.

[0069] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A secondary short circuit prevention structure with a plastic-coated pole, characterized in that: include: A housing, wherein a through hole (11) is formed on the housing; A pole (2), the pole (2) comprising an inserting portion (21) and a connecting portion (22) connected along its own axial direction, the inserting portion (21) being inserted into the through hole (11), a positioning groove (211) being provided on a side wall of the inserting portion (21) along its own axial direction, and the connecting portion (22) being located on a first side of the housing; a first insulating member (3), the first insulating member (3) being formed by a rubber encapsulation process, the first insulating member (3) being partially inserted into the positioning groove (211) and partially covering the surface of the second side of the housing, the first side and the second side being arranged opposite to each other, and being partially sandwiched between the side wall of the insertion portion (21) and the inner wall of the through hole (11); The side wall of the pole (2) is provided with a first high-temperature resistant insulation layer, and / or the surface of the shell facing the pole (2) is provided with a second high-temperature resistant insulation layer.

2. The secondary short circuit prevention structure with a plastic-coated pole according to claim 1, characterized in that: The first high-temperature resistant insulation layer comprises a first-region high-temperature resistant insulation layer (212), and the first-region high-temperature resistant insulation layer (212) is located on the side wall of the insertion portion (21); And / or, along a first direction, the maximum dimension of the connecting portion (22) is greater than the maximum dimension of the through hole (11), the first direction is perpendicular to the axial direction of the pole (2), the first high-temperature resistant insulation layer includes a second-region high-temperature resistant insulation layer (2211), and the second-region high-temperature resistant insulation layer (2211) is located on a first end surface (221) of the connecting portion (22) facing the insertion portion (21); And / or, the first high-temperature resistant insulation layer includes a third-region high-temperature resistant insulation layer (222), and the third-region high-temperature resistant insulation layer (222) is located on the side wall of the connecting portion (22).

3. The secondary short circuit prevention structure with a plastic-coated pole according to claim 1, characterized in that: The second high-temperature resistant insulation layer includes a fourth-area high-temperature resistant insulation layer (13), and the fourth-area high-temperature resistant insulation layer (13) is located on the surface of the second side of the housing around the through hole (11).

4. The secondary short circuit prevention structure with a plastic-coated pole according to claim 3, characterized in that: A positioning ring (12) is convexly provided on the surface of the second side of the housing, the positioning ring (12) is located around the through hole (11), and the positioning ring (12) is inserted into the positioning groove (31) of the first insulating member (3); The fourth zone high temperature resistant insulation layer (13) is located on the second end face (121) of the positioning ring (12), and / or, the fourth zone high temperature resistant insulation layer (13) is located on the inner ring wall surface of the positioning ring (12), and / or, the fourth zone high temperature resistant insulation layer (13) is located on the surface of the second side of the outer shell inside the positioning ring (12).

5. The secondary short circuit prevention structure with a plastic-coated pole according to claim 1, characterized in that: The second high-temperature resistant insulation layer comprises a fifth-area high-temperature resistant insulation layer (14), and the fifth-area high-temperature resistant insulation layer (14) is located on the inner wall of the through hole (11).

6. The secondary short circuit prevention structure with a plastic-coated pole according to any one of claims 1 to 5, characterized in that: The second high-temperature resistant insulation layer includes a sixth-area high-temperature resistant insulation layer (16), and the sixth-area high-temperature resistant insulation layer (16) is located on the surface of the first side of the housing around the through hole (11).

7. The secondary short circuit prevention structure with a plastic-coated pole according to claim 6, characterized in that: A relief groove (15) is provided on the surface of the first side of the housing, the through hole (11) is located at the bottom of the relief groove (15), the relief groove (15) and the connecting portion (22) are coaxially arranged, and along a first direction, the maximum dimension of the connecting portion (22) is smaller than the maximum dimension of the bottom of the relief groove (15), and the first direction is perpendicular to the axial direction of the pole (2); The sixth zone high temperature resistant insulation layer (16) is located at the bottom of the avoidance groove (15), and / or the sixth zone high temperature resistant insulation layer (16) is located on the side wall of the avoidance groove (15).

8. The secondary short circuit prevention structure with a plastic-coated pole according to any one of claims 1 to 5, characterized in that: It also includes a sealing ring (4), which is sleeved on the insertion portion (21) and clamped between a first end surface (221) of the connecting portion (22) facing the insertion portion (21) and the housing.

9. The secondary short circuit prevention structure with a plastic-coated pole according to any one of claims 1 to 5, characterized in that: The invention also includes a second insulating member (5), which is attached to the surface of the first side of the shell, and the second insulating member (5) is partially sandwiched between the first end surface (221) of the connecting portion (22) facing the insertion portion (21) and the shell.

10. A battery, characterized in that It comprises a battery core and a secondary short circuit prevention structure with a rubber-coated pole as claimed in any one of claims 1 to 9, wherein the battery core is located in the shell.

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