Battery structure assembly and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery structure assembly which comprises a first pole post, a second pole output, an inner insulating ring and a heat-resistant clamping ring, the middle connecting part of the first pole column is partially inserted into the through hole of the second pole output, the inner connecting part protrudes out of the through hole in the radial direction of the inner connecting part, the inner insulating ring is arranged on the middle connecting part in a sleeving mode, and the annular part of the inner insulating ring is clamped between the end face, deviating from the interior of the battery, of the inner connecting part and the end face, facing the interior of the battery, of the second pole output; the middle connecting part is sleeved with the heat-resisting clamping ring, the heat-resisting clamping ring is clamped between the annular part and the end face, deviating from the interior of the battery, of the inner connecting part, or the heat-resisting clamping ring is clamped between the annular part and the end face, facing the interior of the battery, of the second pole output, and the heat-resisting clamping ring is made of an organic PTC thermistor or ceramic or mica; therefore, the heat-resistant clamping ring has an insulation effect when the battery is in thermal runaway. The utility model further provides a battery which comprises the battery structure assembly.

Description

Technical Field

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

[0002] A cylindrical battery is provided with a positive electrode terminal and a housing for negative electrode output. To ensure insulation between the positive electrode terminal and the housing, an inner insulating ring is sleeved on the positive electrode terminal, and a part of the inner insulating ring is clamped between the inner connecting part of the positive electrode terminal closest to the battery cell and the inner side wall surface of the housing facing the battery cell, so as to ensure spaced insulation between the two at this place. When the internal battery cell undergoes thermal runaway (such as short circuit), a large amount of heat will be generated in a short time. If the heat cannot be discharged in time, the temperature inside the battery will rise rapidly, and the heat will be quickly conducted to the inner connecting part of the positive electrode terminal closest to the battery cell. The ambient temperature where the inner insulating ring is located will rise sharply, and the contacting inner connecting part will also transfer heat to the inner insulating ring. The inner insulating ring generally uses a plastic material. If a plastic material with a lower melting point is used, it is easy to melt at high temperature, resulting in insulation failure, thus causing the positive electrode terminal to contact and short-circuit with the housing for negative electrode output, causing a secondary short circuit and more serious losses. Summary of the Utility Model

[0003] An object of the utility model is to provide a battery structure assembly, which helps to avoid short-circuiting between the positive electrode output and the negative electrode output during thermal runaway.

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

[0005] Provide a battery structure assembly, including a first-pole terminal, a second-pole output and an inner insulating ring. The first-pole terminal includes an inner connecting part and a middle connecting part arranged in sequence along its own axial direction. The middle connecting part is partially inserted into the through hole of the second-pole output. The inner connecting part protrudes from the through hole along its own radial direction. The inner insulating ring is sleeved on the middle connecting part, and the annular part of the inner insulating ring is clamped between the end face of the inner connecting part facing away from the inside of the battery and the end face of the second-pole output facing the inside of the battery. Its characteristic lies in that the battery structure assembly further includes:

[0006] A heat-resistant clamping ring, the heat-resistant clamping ring is sleeved on the middle connecting part, and the heat-resistant clamping ring is clamped between the annular part and the end face of the inner connecting part facing away from the inside of the battery, or the heat-resistant clamping ring is clamped between the annular part and the end face of the second-pole output facing the inside of the battery. The material of the heat-resistant clamping ring is organic PTC thermistor, ceramic or mica, so that the heat-resistant clamping ring has an insulating effect when the battery undergoes thermal runaway.

[0007] Optionally, the material of the heat-resistant clamping ring is ceramic PTC thermistor or organic PTC thermistor.

[0008] Optionally, the heat-resistant clamping ring is clamped between the annular portion and the end face of the inner connecting portion facing away from the interior of the battery, and the inner edge of the heat-resistant clamping ring abuts against the middle connecting portion;

[0009] And / or, the outer edge of the heat-resistant clamping ring is flush with the outer edge of the inner connecting portion, or the outer edge of the heat-resistant clamping ring protrudes radially from the outer edge of the inner connecting portion along its own radial direction.

[0010] Optionally, the heat-resistant clamping ring is clamped between the annular portion and the end face of the second pole output facing the interior of the battery. The inner insulating ring further includes a tubular portion connected to the annular portion. The tubular portion is sleeved on the middle connecting portion, and the inner edge of the heat-resistant clamping ring abuts against the tubular portion;

[0011] And / or, the outer edge of the heat-resistant clamping ring is flush with the outer edge of the inner connecting portion, or the outer edge of the heat-resistant clamping ring protrudes radially from the outer edge of the inner connecting portion along its own radial direction.

[0012] Optionally, the heat-resistant clamping ring includes a first ring and a second ring. The first ring is clamped between the annular portion and the end face of the inner connecting portion facing away from the interior of the battery, and the second ring is clamped between the annular portion and the end face of the second pole output facing the interior of the battery.

[0013] Optionally, the heat-resistant clamping ring further includes a connecting member for connecting the first ring and the second ring. The connecting member, the first ring and the second ring are integrally formed.

[0014] Optionally, the connecting member is an annular connecting portion. One end of the annular connecting portion along its own axial direction is connected to the first ring, and the other end is connected to the second ring. The annular connecting portion is sleeved on the outside of the annular portion.

[0015] Optionally, the first pole terminal further includes an outer connecting portion, and the outer connecting portion is connected to one end of the middle connecting portion facing away from the interior of the battery.

[0016] Optionally, a sealing ring is further included. The sealing ring is sleeved on the middle connecting portion, and the sealing ring is clamped between the end face of the outer connecting portion facing the interior of the battery and the end face of the second pole output facing away from the interior of the battery;

[0017] And / or, an outer insulating ring is further included. The outer insulating ring is partially sleeved on the outer connecting portion and partially clamped between the end face of the outer connecting portion facing the interior of the battery and the end face of the second pole output facing away from the interior of the battery.

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

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

[0020] Provide a battery, including the above-mentioned battery structure assembly, wherein the second pole output is the housing or the top cover plate, the first pole terminal is the positive pole terminal, the second pole output is the negative output, or the first pole terminal is the negative pole terminal, and the second pole output is the positive output.

[0021] The beneficial effects of the present utility model:

[0022] The present utility model provides a battery structure assembly, including a first pole terminal, a second pole output, an inner insulating ring and a heat-resistant clamping ring. Among them, the first pole terminal includes an inner connecting portion and a middle connecting portion arranged in sequence along its own axis. The middle connecting portion is partially inserted into the through hole of the second pole output, and the inner connecting portion protrudes radially from the through hole, that is, the size of the inner connecting portion is larger than the size of the through hole. The inner insulating ring is sleeved on the middle connecting portion, and the annular portion of the inner insulating ring is clamped between the end face of the inner connecting portion facing away from the inside of the battery and the end face of the second pole output facing the inside of the battery. The heat-resistant clamping ring is sleeved on the middle connecting portion, and the heat-resistant clamping ring is clamped between the annular portion and the end face of the inner connecting portion facing away from the inside of the battery, or the heat-resistant clamping ring is clamped between the annular portion and the end face of the second pole output facing the inside of the battery. The material of the heat-resistant clamping ring is organic PTC thermistor, ceramic or mica, so that the heat-resistant clamping ring has an insulating effect during the thermal runaway of the battery. That is, even if the inner insulating ring melts and fails at high temperature during thermal runaway, the heat-resistant clamping ring can still have an insulating effect, which can ensure the insulation between the inner connecting portion of the first pole terminal and the second pole output, and helps to prevent the short circuit between the first pole terminal and the second pole output from causing greater danger and loss.

[0023] The present utility model also provides a battery, including the above-mentioned battery structure assembly, the second pole output is the housing or the top cover plate, the first pole terminal is the positive pole terminal, the second pole output is the negative output, or the first pole terminal is the negative pole terminal, and the second pole output is the positive output. This battery can ensure the insulation between the inner connecting portion of the first pole terminal and the second pole output, helps to prevent the short circuit between the first pole terminal and the second pole output, that is, helps to avoid the short circuit between the positive output and the negative output from causing greater danger and loss. Description of the drawings

[0024] Figure 1 is an exploded view of the battery structure assembly provided by the embodiment of the present utility model;

[0025] Figure 2 is a partial cross-sectional view of the battery structure assembly (including the first ring) provided by the embodiment of the present utility model;

[0026] Figure 3 It is a partial cross-sectional view of the battery structure assembly (including the second ring) provided by the embodiment of the present utility model;

[0027] Figure 4 It is a partial structural cross-sectional view of the battery provided by the embodiment of the present utility model.

[0028] In the figure:

[0029] 1. First pole terminal; 11. Inner connection part; 12. Middle connection part; 13. Outer connection part;

[0030] 2. Second pole output; 3. Inner insulating ring; 31. Ring-shaped part; 32. Tubular part;

[0031] 4. Heat-resistant clamping ring; 41. First ring; 42. Second ring;

[0032] 5. Sealing ring; 6. Outer insulating ring;

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

[0034] The technical solution 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 used to explain the present utility model, rather than limiting the present utility model. Additionally, 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 the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal height than the second feature.

[0037] As Figures 1 - 3 shown, the battery structure assembly 100 of this embodiment includes a first pole column 1, a second pole output 2, an inner insulating ring 3, and a heat-resistant clamping ring 4. Among them, the first pole column 1 includes an inner connecting portion 11 and a middle connecting portion 12 arranged in sequence along its own axis. The middle connecting portion 12 is partially inserted into the through hole of the second pole output 2, and the inner connecting portion 11 protrudes out of the through hole along its own radial direction, that is, the size of the inner connecting portion 11 is larger than the size of the through hole. The inner insulating ring 3 is sleeved on the middle connecting portion 12, and the annular portion 31 of the inner insulating ring 3 is clamped between the end face of the inner connecting portion 11 facing away from the inside of the battery and the end face of the second pole output 2 facing the inside of the battery. The heat-resistant clamping ring 4 is sleeved on the middle connecting portion 12, and the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the inner connecting portion 11 facing away from the inside of the battery, or the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the second pole output 2 facing the inside of the battery. The material of the heat-resistant clamping ring 4 is organic PTC thermistor, ceramic or mica, so that the heat-resistant clamping ring 4 has an insulating effect when the battery is in thermal runaway. That is, even if the inner insulating ring 3 melts and fails at high temperature during thermal runaway, the heat-resistant clamping ring 4 can still have an insulating effect, which can ensure insulation between the inner connecting portion 11 of the first pole column 1 and the second pole output 2, and helps prevent a short circuit between the first pole column 1 and the second pole output 2 from causing greater danger and loss.

[0038] Optionally, the material of the heat-resistant clamping ring 4 is ceramic PTC thermistor or organic PTC thermistor. Ceramic PTC thermistor belongs to a kind of ceramic material. 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, which can play an insulating role and prevent short circuit of the positive and negative pole outputs of the battery where the heat-resistant clamping ring 4 is located.

[0039] Optionally, the material of the heat-resistant clamping ring 4 can also be other ceramic materials except ceramic PTC thermistor. Ceramic materials generally have insulating properties.

[0040] Optionally, the material of the heat-resistant clamping 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 performance at high temperature of thermal runaway.

[0041] As Figure 2 shown, optionally, the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the inner connecting portion 11 facing away from the inside of the battery. The inner edge of the heat-resistant clamping ring 4 abuts against the middle connecting portion 12 to prevent the inner connecting portion 11 from deforming at high temperature, and contacts the second pole output 2 through the inner hole of the heat-resistant clamping ring 4.

[0042] Optionally, the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the inner connecting portion 11 facing away from the inside of the battery. The outer edge of the heat-resistant clamping ring 4 is flush with the outer edge of the inner connecting portion 11, or the outer edge of the heat-resistant clamping ring 4 protrudes radially from the outer edge of the inner connecting portion 11, preventing the inner connecting portion 11 from deforming at high temperatures, and the outer side of the outer edge of the heat-resistant clamping ring 4 contacts the second pole output 2.

[0043] As Figure 3 shown, optionally, the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the second pole output 2 facing the inside of the battery. The inner insulating ring 3 further includes a tubular portion 32 connected to the annular portion 31. The tubular portion 32 is sleeved on the middle connecting portion 12. The inner edge of the heat-resistant clamping ring 4 abuts against the tubular portion 32, preventing the periphery of the through hole of the second pole output 2 from deforming at high temperatures, and the inner hole of the heat-resistant clamping ring 4 contacts the first pole post 1.

[0044] Optionally, the heat-resistant clamping ring 4 is clamped between the annular portion 31 and the end face of the second pole output 2 facing the inside of the battery. The outer edge of the heat-resistant clamping ring 4 is flush with the outer edge of the inner connecting portion 11, or the outer edge of the heat-resistant clamping ring 4 protrudes radially from the outer edge of the inner connecting portion 11, preventing the periphery of the through hole of the second pole output 2 from deforming at high temperatures, and the outer side of the outer edge of the heat-resistant clamping ring 4 contacts the inner connecting portion 11.

[0045] Optionally, the heat-resistant clamping ring 4 includes a first ring 41 and a second ring 42. The first ring 41 is clamped between the annular portion 31 and the end face of the inner connecting portion 11 facing away from the inside of the battery. The second ring 42 is clamped between the annular portion 31 and the end face of the second pole output 2 facing the inside of the battery. The first ring 41 and the second ring 42 are separately provided or integrally formed.

[0046] Optionally, only the first ring 41 is provided in some embodiments, only the second ring 42 is provided in some other embodiments, both the first ring 41 and the second ring 42 are provided in some other embodiments and are separately provided, and both the first ring 41 and the second ring 42 are provided in some other embodiments. Optionally, the two are integrally formed.

[0047] Optionally, in the embodiment where the first ring 41 and the second ring 42 are integrally formed, the heat-resistant clamping ring 4 further includes a connecting member for connecting the first ring 41 and the second ring 42. The connecting member, the first ring 41 and the second ring 42 are integrally formed.

[0048] Optionally, the connecting member is an annular connecting portion. One end of the annular connecting portion along the axial direction is connected to the first ring 41, and the other end is connected to the second ring 42, that is, the annular connecting portion is sleeved on the outer wall surface of the annular portion 31 of the inner insulating ring 3. It can be known that the integrally formed setting method can provide a certain interval space when the inner insulating ring 3 melts during thermal runaway, further ensuring the insulating setting of the interval between the inner connecting portion 11 and the second pole output 2.

[0049] Optionally, the material of the annular connecting portion is organic PTC thermistor, ceramic or mica, so that the annular connecting portion has an insulating effect during battery thermal runaway. Optionally, the material of the annular connecting portion is ceramic PTC thermistor or organic PTC thermistor.

[0050] Optionally, the first pole terminal 1 further includes an outer connecting portion 13. The outer connecting portion 13 is connected to one end of the middle connecting portion 12 facing away from the inside of the battery, and the outer connecting portion 13 protrudes out of the through hole along its own radial direction.

[0051] Optionally, the battery structure assembly 100 further includes a sealing ring 5. The sealing ring 5 is sleeved on the middle connecting portion 12, and the sealing ring 5 is clamped between the end face of the outer connecting portion 13 facing the inside of the battery and the end face of the second pole output 2 facing away from the inside of the battery, so as to ensure the insulating setting between the end faces of the first pole terminal 1 and the second pole output 2 facing away from the inside of the battery, and can block the gap between the middle connecting portion 12 and the side wall of the through hole.

[0052] Optionally, the battery structure assembly 100 further includes an outer insulating ring 6. The outer insulating ring 6 is partially sleeved on the outer connecting portion 13 and partially clamped between the end face of the outer connecting portion 13 facing the inside of the battery and the end face of the second pole output 2 facing away from the inside of the battery, so as to ensure the insulating interval setting between the end face of the outer connecting portion 13 facing the inside of the battery and the end face of the second pole output 2 facing away from the inside of the battery.

[0053] This embodiment also provides a battery, including the above-mentioned battery structure assembly 100, and the second pole output 2 is a housing or a top cover plate. That is, in some embodiments, the battery can be a cylindrical battery as shown in Figure 4 The second pole output 2 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 second pole output 2 is a top cover plate electrically connected to the second pole terminal. Optionally, the first pole terminal 1 is a positive pole terminal, and the second pole output 2 is a negative output, or the first pole terminal 1 is a negative pole terminal, and the second pole output 2 is a positive output.

[0054] This battery can ensure the insulation between the inner connecting portion 11 of the first pole terminal 1 and the second pole output 2, which helps to prevent the short circuit between the first pole terminal 1 and the second pole output 2, that is, helps to avoid the greater danger and loss caused by the short circuit between the positive output and the negative output.

[0055] 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 the 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 structure component, including a first pole column (1), a second pole output (2) and an inner insulating ring (3), the first pole column (1) includes an inner connection part (11) and a middle connection part (12) arranged in sequence along its own axial direction, the middle connection part (12) is partially inserted into the through hole of the second pole output (2), the inner connection part (11) protrudes from the through hole along its own radial direction, the inner insulating ring (3) is sleeved on the middle connection part (12), and the annular part (31) of the inner insulating ring (3) is clamped between the end face of the inner connection part (11) facing away from the inside of the battery and the end face of the second pole output (2) facing the inside of the battery, characterized in that, The battery structure assembly further includes: A heat-resistant clamping ring (4), the heat-resistant clamping ring (4) is sleeved on the middle connecting portion (12), and the heat-resistant clamping ring (4) is clamped between the annular portion (31) and the end face of the inner connecting portion (11) facing away from the interior of the battery, or the heat-resistant clamping ring (4) is clamped between the annular portion (31) and the end face of the second pole output (2) facing the interior of the battery. The material of the heat-resistant clamping ring (4) is organic PTC thermistor, ceramic or mica, so that the heat-resistant clamping ring (4) has an insulating effect when the battery is thermally out of control.

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

3. The battery structure component according to claim 1, characterized in that, The heat-resistant clamping ring (4) is clamped between the annular portion (31) and the end face of the inner connecting portion (11) facing away from the interior of the battery, and the inner edge of the heat-resistant clamping ring (4) abuts against the middle connecting portion (12); And / or, the outer edge of the heat-resistant clamping ring (4) is flush with the outer edge of the inner connecting portion (11), or the outer edge of the heat-resistant clamping ring (4) protrudes radially from the outer edge of the inner connecting portion (11).

4. The battery structure component according to claim 1, wherein The heat-resistant clamping ring (4) is clamped between the annular portion (31) and the end face of the second pole output (2) facing the interior of the battery. The inner insulating ring (3) further includes a tubular portion (32) connected to the annular portion (31). The tubular portion (32) is sleeved on the middle connecting portion (12), and the inner edge of the heat-resistant clamping ring (4) abuts against the tubular portion (32); And / or, the outer edge of the heat-resistant clamping ring (4) is flush with the outer edge of the inner connecting portion (11), or the outer edge of the heat-resistant clamping ring (4) protrudes radially from the outer edge of the inner connecting portion (11).

5. The battery structure component according to claim 1, characterized in that, The heat-resistant clamping ring (4) includes a first ring (41) and a second ring (42). The first ring (41) is clamped between the annular portion (31) and the end face of the inner connecting portion (11) facing away from the interior of the battery, and the second ring (42) is clamped between the annular portion (31) and the end face of the second pole output (2) facing the interior of the battery.

6. The battery structure component according to claim 5, characterized in that, The heat-resistant clamping ring (4) further includes a connecting member, and the connecting member is used to connect the first ring (41) and the second ring (42). The connecting member, the first ring (41) and the second ring (42) are integrally formed.

7. The battery structure component according to claim 6, wherein, The connecting member is an annular connecting portion. One end of the annular connecting portion along its own axis is connected to the first ring (41), and the other end is connected to the second ring (42). The annular connecting portion is sleeved on the outside of the annular portion (31).

8. The battery structure component according to any one of claims 1-7, characterized in that, The first pole column (1) further includes an outer connecting portion (13), and the outer connecting portion (13) is connected to one end of the middle connecting portion (12) facing away from the interior of the battery.

9. The battery structure component according to claim 8, characterized in that, It further includes a sealing ring (5). The sealing ring (5) is sleeved on the middle connecting portion (12), and the sealing ring (5) is clamped between the end face of the outer connecting portion (13) facing the inside of the battery and the end face of the second pole output (2) facing away from the inside of the battery. And / or, it further includes an outer insulating ring (6). The outer insulating ring (6) is partially sleeved on the outer connecting portion (13) and is partially clamped between the end face of the outer connecting portion (13) facing the inside of the battery and the end face of the second pole output (2) facing away from the inside of the battery.

10. Battery, characterized in that, It includes the battery structure assembly according to any one of claims 1-9. The second pole output (2) is a housing or a top cover plate. The first pole column (1) is a positive pole column, and the second pole output (2) is a negative output, or the first pole column (1) is a negative pole column, and the second pole output (2) is a positive output.

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