Battery assembly and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery assembly, which comprises a first pole output, a second pole post, a sealing ring and a heat-resistant insulating ring. A through hole is formed in the first pole output, the second pole post comprises a middle connecting part and an outer connecting part, the middle connecting part is partially inserted into the through hole, and the outer connecting part protrudes out of the through hole in the radial direction. The sealing ring sleeves the middle connecting part and is clamped between the end face, deviating from the interior of the battery, of the first pole output and the end face, facing the interior of the battery, of the outer connecting part. The middle connecting part is sleeved with the heat-resistant insulating ring, the heat-resistant insulating ring is clamped between the end face, facing the interior of the battery, of the outer connecting part and the sealing ring, or the heat-resistant insulating ring is clamped between the sealing ring and the end face, deviating from the interior of the battery, of the first pole output part, and the heat-resistant insulating ring is made of an organic PTC thermistor or ceramic or mica; therefore, the heat-resistant insulating ring has an insulating effect when the battery is in thermal runaway. The utility model further provides a battery which comprises the battery assembly, and the first pole output is a top cover plate or a shell.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to a battery assembly and a battery. Background Art

[0002] The cylindrical battery is provided with a positive pole and a shell for negative output. In order to ensure the insulation seal between the positive pole and the shell, a sealing ring is sleeved on the positive pole. The sealing ring is used to block the gap between the positive pole and the inner wall of the shell through hole, and the sealing ring is partially sandwiched between the external connection portion provided at the end of the positive pole away from the battery cell and the outer wall of the shell away from the battery cell to ensure the sealing and insulation between the two. When the internal battery cell has thermal runaway (such as short circuit), a large amount of heat will be generated in a short time, and the heat will be transferred to the positive pole and the shell through hole. The temperature of the positive pole and the shell here will rise rapidly. The positive and negative end faces of the sealing ring contact the positive pole and the shell respectively, and will also absorb a lot of heat, and even rise to the melting point, causing the outer layer of the positive and negative end faces of the sealing ring to melt. Once there is a through hole that melts through, there is a risk of short circuit between the positive pole and the shell. Once the short circuit is contacted, the heating rate of thermal runaway will be further increased, causing greater danger and loss. Utility Model Content

[0003] One purpose of the utility model is to provide a battery assembly, which helps to avoid short circuit between positive electrode output and negative electrode output during thermal runaway.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A battery assembly is provided, comprising:

[0006] A first pole output, wherein a through hole is provided on the first pole output;

[0007] The second pole pole comprises a middle connecting portion and an outer connecting portion which are sequentially arranged along its own axial direction, wherein the middle connecting portion is partially inserted in the through hole, and the outer connecting portion protrudes out of the through hole along its own radial direction;

[0008] A sealing ring, which is sleeved on the middle connecting portion and sandwiched between the end surface of the first pole output facing away from the inside of the battery and the end surface of the external connecting portion facing the inside of the battery;

[0009] A heat-resistant insulating ring is sleeved on the middle connecting portion, and the heat-resistant insulating ring is clamped between the end face of the outer connecting portion facing the inside of the battery and the sealing ring, or the heat-resistant insulating ring is clamped between the sealing ring and the end face of the first pole output facing away from the inside of the battery. The material of the heat-resistant insulating ring is organic PTC thermistor, ceramic or mica, so that the heat-resistant insulating ring has an insulating effect when the battery is thermally out of control.

[0010] Optionally, the material of the heat-resistant insulating ring is ceramic PTC thermistor or organic PTC thermistor.

[0011] Optionally, the heat-resistant insulating ring includes a first insulating ring and a second insulating ring. The first insulating ring is clamped between the end face of the outer connecting portion facing the inside of the battery and the sealing ring, and the second insulating ring is clamped between the sealing ring and the end face of the first pole output facing away from the inside of the battery.

[0012] Optionally, the heat-resistant insulating ring further includes a first connecting portion for connecting the first insulating ring and the second insulating ring. The first connecting portion, the first insulating ring and the second insulating ring are integrally formed.

[0013] Optionally, the first connecting portion is tubular. One end of the first connecting portion along its own axis is connected to the first insulating ring, and the other end is connected to the second insulating ring. The first connecting portion is sleeved on the middle connecting portion, or the first connecting portion is sleeved on the outer ring of the sealing ring.

[0014] Optionally, the battery assembly further includes an inner insulating ring and a third insulating ring. The second pole terminal further includes an inner connecting portion connected to one end of the middle connecting portion away from the outer connecting portion. The inner insulating ring is sleeved on the middle connecting portion, and the inner insulating ring is partially clamped between the end face of the inner connecting portion facing away from the inside of the battery and the end face of the first pole output facing the inside of the battery. The third insulating ring is sleeved on the middle connecting portion, and the third insulating ring is clamped between the end face of the inner connecting portion facing away from the inside of the battery and the inner insulating ring, or the third insulating ring is clamped between the inner insulating ring and the end face of the first pole output facing the inside of the battery.

[0015] Optionally, the battery assembly further includes a second connecting portion. The third insulating ring is clamped between the inner insulating ring and the end face of the first pole output facing the inside of the battery, and the heat-resistant insulating ring is clamped between the sealing ring and the end face of the first pole output facing away from the inside of the battery. The second connecting portion is used to connect the third insulating ring and the heat-resistant insulating ring.

[0016] Optionally, the second connecting portion is tubular. One end of the second connecting portion along its own axis is connected to the third insulating ring, and the other end is connected to the heat-resistant insulating ring. The second connecting portion is disposed in a manner that fits the inner wall of the through hole.

[0017] Optionally, the material of the third insulating ring is organic PTC thermistor, ceramic or mica, so that the third insulating ring has an insulating effect when the battery is thermally out of control.

[0018] Another object of the present invention is to provide a battery, which helps to avoid short circuit between the positive output and the negative output during thermal runaway.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] Provide a battery, including the above battery assembly, and the first pole output is the top cover plate or the housing.

[0021] The beneficial effects of the present invention:

[0022] The present invention provides a battery assembly, including a first pole output, a second pole column, a sealing ring and a heat-resistant insulating ring. Among them, a through hole is provided on the first pole output. The second pole column includes a middle connecting portion and an outer connecting portion arranged in sequence along its own axis. The middle connecting portion is partially inserted at the through hole, and the outer connecting portion protrudes out of the through hole along its own radial direction. The sealing ring is sleeved on the middle connecting portion, and the sealing ring is clamped between the end face of the first pole output facing away from the inside of the battery and the end face of the outer connecting portion facing the inside of the battery. The heat-resistant insulating ring is sleeved on the middle connecting portion, and the heat-resistant insulating ring is clamped between the end face of the outer connecting portion facing the inside of the battery and the sealing ring, or the heat-resistant insulating ring is clamped between the sealing ring and the end face of the first pole output facing away from the inside of the battery. The material of the heat-resistant insulating ring is organic PTC thermistor, ceramic or mica, so that the heat-resistant insulating ring has an insulating effect when the battery is thermally out of control. That is, even if the sealing ring melts and fails during thermal runaway, the heat-resistant insulating ring can still have an insulating effect, which can ensure insulation between the outer connecting portion of the second pole column and the first pole output, and helps to prevent short circuit between the second pole column and the first pole output from causing greater danger and loss. That is, the battery assembly helps to avoid short circuit between the positive output and the negative output during thermal runaway.

[0023] The present invention also provides a battery, including the above battery assembly, and the first pole output is the top cover plate or the housing. This battery can help to avoid short circuit between the positive output and the negative output during thermal runaway. Description of the Drawings

[0024] Figure 1 is an exploded view of the battery assembly provided by the first embodiment of the present invention;

[0025] Figure 2It is a partial cross-sectional view of the battery assembly (including the first insulating member) provided in the first embodiment of the present utility model;

[0026] Figure 3 It is a partial cross-sectional view of the battery assembly (including the second insulating member) provided in the first embodiment of the present utility model;

[0027] Figure 4 It is a partial cross-sectional view of the battery assembly provided in the second embodiment of the present utility model;

[0028] Figure 5 It is a partial structural cross-sectional view of the battery provided in the third embodiment of the present utility model.

[0029] In the figure:

[0030] 1. First pole output; 2. Second pole column; 21. Middle connection part; 22. Outer connection part; 23. Inner connection part;

[0031] 3. Sealing ring; 4. Heat-resistant insulating ring; 41. First insulating ring; 42. Second insulating ring;

[0032] 5. Inner insulating ring; 6. Third insulating ring; 7. Outer insulating ring; 8. Second connection part;

[0033] 100. Battery assembly; 200. Battery cell. Detailed implementation manners

[0034] The technical solutions of the present utility model will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0037] Embodiment 1

[0038] As Figures 1 - 3 shown, the battery assembly 100 of this embodiment includes a first pole output 1, a second pole terminal 2, a sealing ring 3 and a heat-resistant insulating ring 4. Among them, a through hole is provided on the first pole output 1, and the second pole terminal 2 includes a middle connecting portion 21 and an outer connecting portion 22 arranged in sequence along its own axial direction. The middle connecting portion 21 is partially inserted at the through hole, and the outer connecting portion 22 protrudes out of the through hole along its own radial direction, that is, the dimension of the outer connecting portion 22 along the radial direction is greater than the dimension of the through hole. The sealing ring 3 is sleeved on the middle connecting portion 21, and the sealing ring 3 is clamped between the end face of the first pole output 1 facing away from the battery interior and the end face of the outer connecting portion 22 facing the battery interior. The heat-resistant insulating ring 4 is sleeved on the middle connecting portion 21, and the heat-resistant insulating ring 4 is clamped between the end face of the outer connecting portion 22 facing the battery interior and the sealing ring 3, or the heat-resistant insulating ring 4 is clamped between the sealing ring 3 and the end face of the first pole output 1 facing away from the battery interior. The material of the heat-resistant insulating ring 4 is organic PTC thermistor, ceramic or mica, so that the heat-resistant insulating ring 4 has an insulating effect when the battery is in thermal runaway. That is, even if the sealing ring 3 melts and fails during thermal runaway, the heat-resistant insulating ring 4 can still have an insulating effect. Whether it is arranged between the outer connecting portion 22 and the sealing ring 3 or between the sealing ring 3 and the first pole output 1, it helps to ensure insulation between the outer connecting portion 22 of the second pole terminal 2 and the first pole output 1, and helps to prevent a short circuit between the second pole terminal 2 and the first pole output 1 after the sealing ring 3 melts and fails, causing greater danger and loss. That is, the battery assembly 100 helps to avoid a short circuit between the positive output and the negative output during thermal runaway.

[0039] Optionally, the material of the heat-resistant insulating ring 4 is ceramic PTC thermistor or organic PTC thermistor. The ceramic PTC thermistor belongs to a kind of ceramic material. The PTC thermistor is a typical semiconductor resistor with temperature sensitivity. When the temperature exceeds a certain value, its resistance value increases step by step with the increase of temperature. At the high temperature of thermal runaway, the resistance value of the PTC thermistor increases, that is, it can play an insulating role to prevent a short circuit between the positive output and the negative output of the battery where the heat-resistant insulating ring 4 is located.

[0040] Optionally, the material of the heat-resistant insulating ring 4 can also be other ceramic materials besides the ceramic PTC thermistor, and ceramic materials generally have insulating properties.

[0041] Optionally, the material of the heat-resistant insulating ring 4 can also be mica or composite mica. Composite mica is a composite material containing mica components, which can withstand heat and has good insulating properties under the high temperature of thermal runaway.

[0042] Optionally, the heat-resistant insulating ring 4 includes a first insulating ring 41 and a second insulating ring 42. The first insulating ring 41 is clamped between the end face of the outer connection part 22 facing the inside of the battery and the sealing ring 3, and the second insulating ring 42 is clamped between the sealing ring 3 and the end face of the first pole output 1 facing away from the inside of the battery.

[0043] As Figure 2 shown, optionally, the inner edge of the first insulating ring 41 abuts against the middle connection part 21 to prevent the outer connection part 22 from deforming at high temperature, and the first pole output 1 is contacted through the inner hole of the first insulating ring 41.

[0044] Optionally, the outer edge of the first insulating ring 41 abuts against the outer insulating ring 7. The outer insulating ring 7 is sleeved on the outer connection part 22, and part of it is erected between the outer connection part 22 and the end face of the first pole output 1 facing away from the inside of the battery. The first insulating ring 41 can be butted with the outer insulating ring 7, and the two completely cover the annular end face of the outer connection part 22 facing the first pole output 1, which can ensure the insulation between the two to the greatest extent.

[0045] As Figure 3 shown, optionally, the inner edge of the first insulating ring 41 abuts against the middle connection part 21 to prevent the outer connection part 22 from deforming at high temperature. After the sealing ring 3 melts, the deformed outer connection part 22 contacts the first pole output 1 through the inner hole of the first insulating ring 41.

[0046] Optionally, the outer edge of the first insulating ring 41 abuts against the outer insulating ring 7, that is, the first insulating ring 41 can be butted with the outer insulating ring 7, and the two completely cover the annular end face of the outer connection part 22 facing the first pole output 1, that is, even if the sealing ring 3 completely melts, the insulation between the outer connection part 22 and the first pole output 1 can be ensured to the greatest extent.

[0047] Optionally, the heat-resistant insulating ring 4 further includes a first connection part for connecting the first insulating ring 41 and the second insulating ring 42. Optionally, the material of the first connection part is organic PTC thermistor, ceramic or mica, so that the first connection part has an insulating effect when the battery undergoes thermal runaway. Optionally, the material of the first connection part is ceramic PTC thermistor or organic PTC thermistor. Optionally, the first connection part, the first insulating ring 41 and the second insulating ring 42 are integrally formed.

[0048] Optionally, the first connecting portion is tubular. One end of the first connecting portion along its own axis is connected to the first insulating ring 41, and the other end is connected to the second insulating ring 42. The first connecting portion is sleeved on the middle connecting portion 21, or the first connecting portion is sleeved on the outer ring of the sealing ring 3. The first connecting portion has the functions of connection and support. When the sealing ring 3 melts, the first connecting portion can fix the distance between the outer connecting portion 22 and the first pole output 1, and further ensure insulation between the outer connecting portion 22 and the first pole output 1. Optionally, the overall cross-section of the first connecting portion, the first insulating ring 41, and the second insulating ring 42 is in the shape of an I, a C, or similar to a T.

[0049] Optionally, in some embodiments, only the first insulating ring 41 is provided. In some other embodiments, only the second insulating ring 42 is provided. In some other embodiments, both the first insulating ring 41 and the second insulating ring 42 are provided and are separately arranged. In some other embodiments, both the first insulating ring 41 and the second insulating ring 42 are provided and are connected by the first connecting portion.

[0050] Optionally, the first pole output 1 is a top cover plate or a housing. When the first pole output 1 is a top cover plate, the battery assembly 100 can be used to manufacture a square battery. When the first pole output 1 is a housing, the battery assembly 100 can be used to manufacture a cylindrical battery.

[0051] Embodiment Two

[0052] This embodiment discloses a battery assembly 100. The difference between the battery assembly 100 in this embodiment and the battery assembly 100 in Embodiment One is that: the battery assembly 100 further includes an inner insulating ring 5 and a third insulating ring 6. The second pole terminal 2 further includes an inner connecting portion 23. The inner connecting portion 23 is connected to one end of the middle connecting portion 21 away from the outer connecting portion 22. The inner insulating ring 5 is sleeved on the middle connecting portion 21, and the inner insulating ring 5 is partially clamped between the end face of the inner connecting portion 23 facing away from the inside of the battery and the end face of the first pole output 1 facing the inside of the battery. The third insulating ring 6 is sleeved on the middle connecting portion 21, and the third insulating ring 6 is clamped between the end face of the inner connecting portion 23 facing away from the inside of the battery and the inner insulating ring 5, or the third insulating ring 6 is clamped between the inner insulating ring 5 and the end face of the first pole output 1 facing the inside of the battery.

[0053] When the battery is thermally out of control, the inner insulating ring 5 may also melt and fail at high temperatures. Whether the third insulating ring 6 is arranged between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery, or between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5, it has an insulating effect. The third insulating ring 6 can ensure insulation between the inner connecting portion 23 and the first pole output 1, and helps prevent a short circuit between the inner connecting portion 23 and the first pole output 1 from causing greater danger and loss.

[0054] Optionally, in some embodiments, a first insulating ring 41 and a third insulating ring 6 disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery are provided. In some other embodiments, a first insulating ring 41 and a third insulating ring 6 disposed between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5 are provided. In some other embodiments, a first insulating ring 41 and two third insulating rings 6 are provided, and the two third insulating rings 6 are respectively disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery, and between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5. In some other embodiments, a second insulating ring 42 and a third insulating ring 6 disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery are provided. In some other embodiments, a second insulating ring 42 and a third insulating ring 6 disposed between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5 are provided. In some other embodiments, a second insulating ring 42 and two third insulating rings 6 are provided, and the two third insulating rings 6 are respectively disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery, and between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5. In some other embodiments, a first insulating ring 41, a second insulating ring 42 and a third insulating ring 6 disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery are provided. In some other embodiments, a first insulating ring 41, a second insulating ring 42 and a third insulating ring 6 disposed between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5 are provided. In some other embodiments, a first insulating ring 41, a second insulating ring 42 and two third insulating rings 6 are provided, and the two third insulating rings 6 are respectively disposed between the inner insulating ring 5 and the end face of the inner connecting portion 23 facing away from the inside of the battery, and between the end face of the first pole output 1 facing the inside of the battery and the inner insulating ring 5.

[0055] In the above embodiments, when the first insulating ring 41 and the second insulating ring 42 are provided simultaneously, the first connecting portion can be selectively provided. When two third insulating rings 6 are provided simultaneously, a connecting member can also be selectively provided to connect the two third insulating rings 6 and fix the positions between them. Of course, whether it is the first insulating ring 41, the second insulating ring 42 or the third insulating ring 6, they can be integrally formed by encapsulating with the sealing ring 3 or the inner insulating ring 5, which is not limited herein.

[0056] As Figure 4 shown, optionally, the battery assembly 100 further includes a second connecting portion 8. The third insulating ring 6 is clamped between the inner insulating ring 5 and the end face of the first pole output 1 facing the inside of the battery, and the heat-resistant insulating ring 4 is clamped between the sealing ring 3 and the end face of the first pole output 1 facing away from the inside of the battery, that is, the heat-resistant insulating ring 4 is provided with the second insulating ring 42. The second connecting portion 8 is used to connect the third insulating ring 6 and the heat-resistant insulating ring 4, that is, the third insulating ring 6 and the second insulating ring 42.

[0057] Optionally, the second connecting portion 8 is tubular. One end of the second connecting portion 8 along its own axial direction is connected to the third insulating ring 6, and the other end is connected to the heat-resistant insulating ring 4. The second connecting portion 8 is arranged in conformity with the inner wall of the through hole. After both the sealing ring 3 and the inner insulating ring 5 are melted, the second connecting portion 8 can prevent the inner wall of the through hole on the first pole output 1 from being short-circuited with the middle connecting portion 21. And when the inner wall of the second insulating ring 42 abuts against the middle connecting portion 21, the second connecting portion 8 is connected to the second insulating ring 42, and the distance between the middle connecting portion 21 and the inner wall of the through hole on the first pole output 1 can be further fixed, further ensuring insulation between the middle connecting portion 21 and the first pole output 1. Optionally, the overall cross-section of the second connecting portion 8, the third insulating ring 6 and the second insulating ring 42 is in the shape of an I, a C or similar to a T.

[0058] Optionally, the material of the third insulating ring 6 is organic PTC thermistor, ceramic or mica, so that the third insulating ring 6 has an insulating effect when the battery is thermally out of control. Optionally, the material of the third insulating ring 6 is ceramic PTC thermistor or organic PTC thermistor.

[0059] Optionally, the material of the second connecting portion 8 is organic PTC thermistor, ceramic or mica, so that the second connecting portion 8 has an insulating effect when the battery is thermally out of control. Optionally, the material of the second connecting portion 8 is ceramic PTC thermistor or organic PTC thermistor.

[0060] In addition, the rest of the structure of the battery assembly 100 provided in this embodiment is the same as that of the battery assembly 100 in Embodiment 1, and will not be described in detail here.

[0061] Embodiment 3

[0062] As Figure 5 shown, this embodiment discloses a battery, including the battery assembly 100 described in Embodiment 1 or Embodiment 2, and the first pole output 1 is a top cover plate or a housing. That is, in some embodiments, the battery can be a cylindrical battery as Figure 5 shown, the first pole output 1 is a housing, and the battery cell 200 is arranged inside the housing. In other embodiments, the battery can also be a square battery, and the first pole output 1 is a top cover plate conducting with the first pole terminal. Optionally, the second pole terminal 2 is a positive pole terminal, the first pole output 1 is a negative output, or the second pole terminal 2 is a negative pole terminal, and the first pole output 1 is a positive output.

[0063] This battery can ensure insulation between the outer connecting portion 22 of the second pole terminal 2 and the first pole output 1, that is, even if the heat-insulating seal ring 3 melts during thermal runaway, it can still help prevent short-circuiting between the second pole terminal 2 and the first pole output 1, that is, it helps avoid greater danger and loss caused by short-circuiting between the positive output and the negative output.

[0064] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Battery assembly, characterized in that, Comprising: A first pole output (1), on which a through hole is provided; A second pole column (2), including a middle connection part (21) and an outer connection part (22) arranged in sequence along its own axis. The middle connection part (21) is partially inserted at the through hole, and the outer connection part (22) protrudes from the through hole along its own radial direction; A sealing ring (3), the sealing ring (3) is sleeved on the middle connection part (21), and the sealing ring (3) is clamped between the end face of the first pole output (1) facing away from the inside of the battery and the end face of the outer connection part (22) facing the inside of the battery; A heat-resistant insulating ring (4), the heat-resistant insulating ring (4) is sleeved on the middle connection part (21), and the heat-resistant insulating ring (4) is clamped between the end face of the outer connection part (22) facing the inside of the battery and the sealing ring (3), or the heat-resistant insulating ring (4) is clamped between the sealing ring (3) and the end face of the first pole output (1) facing away from the inside of the battery. The material of the heat-resistant insulating ring (4) is organic PTC thermistor, ceramic or mica, so that the heat-resistant insulating ring (4) has an insulating effect when the battery is in thermal runaway.

2. The battery assembly according to claim 1, wherein, The material of the heat-resistant insulating ring (4) is ceramic PTC thermistor or organic PTC thermistor.

3. The battery assembly according to claim 1, wherein The heat-resistant insulating ring (4) includes a first insulating ring (41) and a second insulating ring (42). The first insulating ring (41) is clamped between the end face of the outer connection part (22) facing the inside of the battery and the sealing ring (3), and the second insulating ring (42) is clamped between the sealing ring (3) and the end face of the first pole output (1) facing away from the inside of the battery.

4. The battery assembly according to claim 3, characterized in that, The heat-resistant insulating ring (4) further includes a first connection part, and the first connection part is used to connect the first insulating ring (41) and the second insulating ring (42). The first connection part, the first insulating ring (41) and the second insulating ring (42) are integrally formed.

5. The battery assembly according to claim 4, wherein, The first connection part is tubular. One end of the first connection part along its own axis is connected to the first insulating ring (41), and the other end is connected to the second insulating ring (42). The first connection part is sleeved on the middle connection part (21), or the first connection part is sleeved on the outer circle of the sealing ring (3).

6. The battery assembly according to any one of claims 1-5, characterized in that, The battery assembly (100) further includes an inner insulating ring (5) and a third insulating ring (6). The second pole column (2) further includes an inner connecting portion (23). The inner connecting portion (23) is connected to one end of the middle connecting portion (21) away from the outer connecting portion (22). The inner insulating ring (5) is sleeved on the middle connecting portion (21), and a part of the inner insulating ring (5) is clamped between the end face of the inner connecting portion (23) facing away from the inside of the battery and the end face of the first pole output (1) facing the inside of the battery. The third insulating ring (6) is sleeved on the middle connecting portion (21), and the third insulating ring (6) is clamped between the end face of the inner connecting portion (23) facing away from the inside of the battery and the inner insulating ring (5), or the third insulating ring (6) is clamped between the inner insulating ring (5) and the end face of the first pole output (1) facing the inside of the battery.

7. The battery assembly according to claim 6, characterized in that, The battery assembly (100) further includes a second connecting portion (8). The third insulating ring (6) is clamped between the inner insulating ring (5) and the end face of the first pole output (1) facing the inside of the battery. The heat-resistant insulating ring (4) is clamped between the sealing ring (3) and the end face of the first pole output (1) facing away from the inside of the battery. The second connecting portion (8) is used to connect the third insulating ring (6) and the heat-resistant insulating ring (4).

8. The battery assembly according to claim 7, characterized in that, The second connecting portion (8) is tubular. One end of the second connecting portion (8) along its own axis is connected to the third insulating ring (6), and the other end is connected to the heat-resistant insulating ring (4). The second connecting portion (8) is arranged in a manner that it fits the inner wall of the through hole.

9. The battery assembly according to claim 6, wherein, The material of the third insulating ring (6) is organic PTC thermistor, ceramic or mica, so that the third insulating ring (6) has an insulating effect when the battery is in thermal runaway.

10. A battery, characterized in that, It includes the battery assembly according to any one of claims 1-9, and the first pole output (1) is a top cover plate or a housing.

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