Battery energy storage device structure assembly and battery energy storage device

Abstract

The utility model relates to the technical field of energy storage devices, in particular to a battery energy storage device structural component which comprises a first pole output, a second pole post, an insulating component and a first heat-resistant insulating tube, a through hole is formed in the first pole output, and the middle connecting part of the second pole post is partially inserted into the through hole. The insulating assembly sleeves the middle connecting part and is partially clamped between the middle connecting part and the inner wall of the through hole. The middle connecting part is sleeved with the first heat-resistant insulating tube, the first heat-resistant insulating tube is clamped between the middle connecting part and the insulating assembly, and the first heat-resistant insulating tube is made of an organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube has an insulating effect when the battery energy storage device is in thermal runaway. The utility model further provides a battery energy storage device which comprises the battery energy storage device structural assembly, and the first pole output is a shell or a top cover plate. According to the battery energy storage device structure assembly and the battery energy storage device, short circuit of positive electrode output and negative electrode output during thermal runaway can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to a structural component of a battery energy storage device and a battery energy storage device. Background Technique

[0002] A cylindrical battery is provided with a housing for a positive electrode terminal and a negative electrode output. In order to ensure insulation between the positive electrode terminal and the housing, an inner insulating ring and a sealing ring are sleeved on the positive electrode terminal, and the inner insulating ring and the sealing ring are axially butted along the positive electrode terminal to completely wrap the side wall of the part of the positive electrode terminal inserted into the through hole of the housing to ensure insulation from the side wall of the through hole. When the battery cell inside the cylindrical battery 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 positive electrode terminal. The ambient temperature where the inner insulating ring is located will rise sharply, and the parts of the inner insulating ring and the sealing ring in contact with the positive electrode terminal will also receive a large amount of heat. The inner insulating ring and the sealing ring generally adopt plastic materials. If a plastic material with a relatively low melting point is used, it is easy to melt at high temperatures, resulting in insulation failure. Even if there is local insulation failure, it may cause contact short circuit between the positive electrode terminal and the housing due to the relative movement of the positive electrode terminal with respect to the housing along its radial direction, accelerating the process of thermal runaway and causing more serious dangers and losses. Summary of the Utility Model

[0003] An object of the utility model is to provide a structural component of a battery energy storage device, which can help avoid short circuit 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 structural component of a battery energy storage device, including:

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

[0007] A second pole terminal, including a middle connection part, and a part of the middle connection part is inserted into the through hole;

[0008] An insulating component, which is sleeved on the middle connection part and partially clamped between the middle connection part and the inner wall of the through hole;

[0009] A first heat-resistant insulating tube, which is sleeved on the middle connection part, and the first heat-resistant insulating tube is clamped between the middle connection part and the insulating component. The material of the first heat-resistant insulating tube is organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube has an insulating effect when the battery energy storage device undergoes thermal runaway.

[0010] Optionally, the material of the first heat-resistant insulating tube is a ceramic PTC thermistor or an organic PTC thermistor.

[0011] Optionally, the second pole terminal further includes an inner connecting portion, the inner connecting portion is connected to one end of the middle connecting portion close to the inside of the battery energy storage device, the inner connecting portion protrudes radially from the middle connecting portion, and one end of the first heat-resistant insulating tube abuts against the end face of the inner connecting portion facing away from the inside of the battery energy storage device;

[0012] And / or, the second pole terminal further includes an outer connecting portion, the outer connecting portion is connected to one end of the middle connecting portion away from the inside of the battery energy storage device, the outer connecting portion protrudes radially from the middle connecting portion, and the other end of the first heat-resistant insulating tube abuts against the end face of the outer connecting portion facing the inside of the battery energy storage device.

[0013] Optionally, the second pole terminal further includes an inner connecting portion, the inner connecting portion is connected to one end of the middle connecting portion close to the inside of the battery energy storage device, the inner connecting portion protrudes radially from the middle connecting portion, the insulating assembly includes a first ring, the first ring is clamped between the end face of the inner connecting portion facing away from the inside of the battery energy storage device and the end face of the first pole output facing the inside of the battery energy storage device, the battery energy storage device structural assembly further includes a first heat-resistant insulating ring, the first heat-resistant insulating ring is clamped between the end face of the inner connecting portion facing away from the inside of the battery energy storage device and the first ring, or clamped between the first ring and the end face of the first pole output facing the inside of the battery energy storage device, and the material of the first heat-resistant insulating ring is an organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating ring has an insulating effect when the battery energy storage device is out of control due to heat.

[0014] Optionally, the inner circle of the first heat-resistant insulating ring is connected to the outer wall of the first heat-resistant insulating tube.

[0015] Optionally, the second pole terminal further includes an external connection portion, which is connected to one end of the middle connection portion away from the inside of the battery energy storage device. The external connection portion protrudes from the middle connection portion along its own radial direction. The insulating component includes a second ring, and the second ring is clamped between the end face of the external connection portion facing the inside of the battery energy storage device and the end face of the first pole output facing away from the inside of the battery energy storage device. The battery energy storage device structure component further includes a second heat-resistant insulating ring, and the second heat-resistant insulating ring is clamped between the end face of the external connection portion facing the inside of the battery energy storage device and the second ring, or clamped between the second ring and the end face of the first pole output facing away from the inside of the battery energy storage device. The material of the second heat-resistant insulating ring is organic PTC thermistor, ceramic or mica, so that the second heat-resistant insulating ring has an insulating effect when the battery energy storage device is out of control thermally.

[0016] Optionally, the inner ring of the second heat-resistant insulating ring is connected to the outer wall of the first heat-resistant insulating tube.

[0017] Optionally, the battery energy storage device structure component further includes a second heat-resistant insulating tube, and the second heat-resistant insulating tube is sleeved outside the insulating component and clamped between the insulating component and the inner wall of the through hole.

[0018] Optionally, the battery energy storage device structure component further includes a support connection ring. The insulating component includes an inner insulating ring and a sealing ring arranged in sequence along the axial direction of the second pole terminal. The support connection ring is clamped between the inner insulating ring and the sealing ring. The inner ring of the support connection ring is connected to the first heat-resistant insulating tube, and the outer ring of the support connection ring is connected to the second heat-resistant insulating tube.

[0019] Another object of the present invention is to provide a battery energy storage device, which can help avoid short circuit between the positive output and the negative output when the battery is out of control thermally.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] There is provided a battery energy storage device, including the above-mentioned battery energy storage device structure component, and the first pole output is a housing or a top cover plate.

[0022] The beneficial effects of the present invention:

[0023] The present utility model provides a structural component of a battery energy storage device, including a first pole output, a second pole column, an insulating component, and a first heat-resistant insulating tube. Among them, a through hole is provided on the first pole output, and the second pole column includes a middle connection part, and part of the middle connection part is inserted into the through hole. The insulating component is sleeved on the middle connection part and is partially clamped between the middle connection part and the inner wall of the through hole. The first heat-resistant insulating tube is sleeved on the middle connection part, and the first heat-resistant insulating tube is clamped between the middle connection part and the insulating component. The material of the first heat-resistant insulating tube is organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube has an insulating effect when the battery energy storage device is in thermal runaway. That is, even if the insulating component melts and fails during thermal runaway, the first heat-resistant insulating tube can still have an insulating effect, which can ensure insulation between the middle connection part of the second pole column and the inner wall of the through hole of the first pole output, and helps prevent a short circuit between the second pole column and the first pole output from causing greater danger and loss. That is, this battery energy storage device component helps avoid a short circuit between the positive output and the negative output during thermal runaway.

[0024] The present utility model provides a battery energy storage device, including the above-mentioned structural component of the battery energy storage device, and the first pole output is a housing or a top cover plate. This battery energy storage device can help avoid a short circuit between the positive output and the negative output during thermal runaway. Description of the Drawings

[0025] Figure 1 is an exploded view of the structural component of the battery energy storage device provided by an embodiment of the present utility model;

[0026] Figure 2 is a partial cross-sectional view of the structural component of the battery energy storage device provided by an embodiment of the present utility model;

[0027] Figure 3 is a partial cross-sectional view of the structural component of the battery energy storage device (including a first heat-resistant insulating ring and a second heat-resistant insulating ring) provided by an embodiment of the present utility model;

[0028] Figure 4 is a partial cross-sectional view of a part of the battery energy storage device provided by an embodiment of the present utility model.

[0029] In the figure:

[0030] 100, structural component of the battery energy storage device; 110, first pole output;

[0031] 120, second pole column; 121, middle connection part; 122, inner connection part; 123, outer connection part;

[0032] 130, insulating component; 131, first ring; 132, second ring; 1301, inner insulating ring; 1302, sealing ring;

[0033] 140. First heat-resistant insulating tube; 150. First heat-resistant insulating ring; 160. Second heat-resistant insulating ring; 170. Outer insulating ring;

[0034] 200. Battery cell. Detailed implementation manner

[0035] Before explaining any implementation manner of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0036] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including such element.

[0037] In the present application, the term "and / or" is a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "and / or" relationship between the front and rear associated objects.

[0038] In the present application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection means that two parts or components are connected together without setting intermediate parts, and indirect connection means that two parts or components are respectively connected to at least one intermediate part, and these two parts or components are connected through the intermediate part. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0039] In the present application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use in relation to a particular value, etc. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. The relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values not using relative terms should also be disclosed as having tolerances. In addition, "substantially" when expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular) may refer to plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0040] In the present application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0041] In the present application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, below can include directly below, lower left, lower right, front lower, and rear lower, etc.

[0042] As Figure 1 - Figure 2As shown, the battery energy storage device structural component 100 of this embodiment includes a first pole output 110, a second pole pole 120, an insulating component 130 and a first heat-resistant insulating tube 140. Among them, a through hole is opened on the first pole output 110, and the second pole pole 120 includes a middle connecting portion 121, and the middle connecting portion 121 is partially inserted in the through hole. The insulating component 130 is sleeved on the middle connecting portion 121, and is partially sandwiched between the middle connecting portion 121 and the inner wall of the through hole. The first heat-resistant insulating tube 140 is sleeved on the middle connecting portion 121, and the first heat-resistant insulating tube 140 is sandwiched between the middle connecting portion 121 and the insulating component 130. The material of the first heat-resistant insulating tube 140 is an organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube 140 has an insulating effect when the battery energy storage device is thermally runaway. Even if the insulating component 130 melts and fails during thermal runaway, the first heat-resistant insulating tube 140 can still have an insulating effect, and can ensure insulation between the middle connecting portion 121 of the second pole column 120 and the inner wall of the through hole of the first pole output 110, which helps to prevent the short circuit between the second pole column 120 and the first pole output 110 to cause greater danger and loss, that is, the battery energy storage device structural component 100 helps to avoid the short circuit between the positive output and the negative output during thermal runaway.

[0043] Optionally, the material of the first heat-resistant insulating tube 140 is a ceramic PTC thermistor or an organic PTC thermistor, and the ceramic PTC thermistor is a type of ceramic material. A PTC thermistor is a typical temperature-sensitive semiconductor resistor. When a certain temperature is exceeded, its resistance value increases stepwise with the increase in temperature. Under high temperatures of thermal runaway, the resistance value of the PTC thermistor increases, which can play an insulating role and prevent the positive output and the negative output of the battery energy storage device where the first heat-resistant insulating tube 140 is located from being short-circuited.

[0044] Optionally, the material of the first heat-resistant insulating tube 140 may also be other ceramic materials besides the ceramic PTC thermistor, and ceramic materials generally have insulation properties.

[0045] Optionally, the material of the first heat-resistant insulating tube 140 may also be mica or composite mica. Composite mica is a composite material containing mica components, which is heat-resistant and has good insulation properties under high temperatures of thermal runaway.

[0046] Optionally, the second pole 120 also includes an inner connecting portion 122, which is connected to one end of the middle connecting portion 121 close to the interior of the battery energy storage device, and the inner connecting portion 122 protrudes radially from the middle connecting portion 121. One end of the first heat-resistant insulating tube 140 abuts against the end surface of the inner connecting portion 122 facing away from the interior of the battery energy storage device to prevent the second pole 120 from moving axially and radially after the insulating assembly 130 melts, and the middle connecting portion 121 close to the inner connecting portion 122 contacts the inner wall of the through hole to short-circuit.

[0047] Optionally, the second pole terminal 120 further includes an outer connection portion 123. The outer connection portion 123 is connected to one end of the middle connection portion 121 away from the inside of the battery energy storage device. The outer connection portion 123 protrudes radially from the middle connection portion 121. The other end of the first heat-resistant insulating tube 140 abuts against the end face of the outer connection portion 123 facing the inside of the battery energy storage device, so as to prevent the second pole terminal 120 from moving axially and radially after the insulating component 130 melts, and prevent the middle connection portion 121 near the outer connection portion 123 from contacting the inner wall of the through hole and causing a short circuit. The first heat-resistant insulating tube 140 wrapping all of the middle connection portion 121 can prevent the middle connection portion 121 from contacting the inner wall of the through hole and causing a short circuit to the greatest extent, ensuring the protection effect.

[0048] Optionally, the insulating component 130 includes a first ring 131. The first ring 131 is clamped between the end face of the inner connection portion 122 facing away from the inside of the battery energy storage device and the end face of the first pole output 110 facing the inside of the battery energy storage device. As Figure 3 shown, the battery energy storage device structural component 100 further includes a first heat-resistant insulating ring 150. The first heat-resistant insulating ring 150 is clamped between the end face of the inner connection portion 122 facing away from the inside of the battery energy storage device and the first ring 131, or clamped between the first ring 131 and the end face of the first pole output 110 facing the inside of the battery energy storage device (not shown in the figure). The material of the first heat-resistant insulating ring 150 is organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating ring 150 has an insulating function when the battery energy storage device is out of control thermally. When the first ring 131 melts during thermal runaway, the setting of the first heat-resistant insulating ring 150 can ensure insulation between the end face of the inner connection portion 122 facing away from the inside of the battery energy storage device and the end face of the first pole output 110 facing the inside of the battery energy storage device.

[0049] Similarly, optionally, the material of the first heat-resistant insulating ring 150 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 to prevent the positive output and negative output of the battery energy storage device where the first heat-resistant insulating ring 150 is located from being short-circuited.

[0050] Optionally, the material of the first heat-resistant insulating ring 150 can also be other ceramic materials except ceramic PTC thermistor. Ceramic materials generally have insulating properties.

[0051] Optionally, the material of the first heat-resistant insulating ring 150 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 the high temperature of thermal runaway.

[0052] Optionally, when the first heat-resistant insulating ring 150 is clamped between the end face of the inner connecting portion 122 facing away from the inside of the battery energy storage device and the first ring 131, the inner ring of the first heat-resistant insulating ring 150 abuts against the middle connecting portion 121, and the outer ring edge is flush with the edge of the inner connecting portion 122 or the outer ring edge of the first heat-resistant insulating ring 150 protrudes from the edge of the inner connecting portion 122. When the first heat-resistant insulating ring 150 is clamped between the first ring 131 and the end face of the first pole output 110 facing the inside of the battery energy storage device, the inner ring of the first heat-resistant insulating ring 150 abuts against the insulating component 130, and the outer ring edge is flush with the edge of the inner connecting portion 122 or the outer ring edge of the first heat-resistant insulating ring 150 protrudes from the edge of the inner connecting portion 122, so as to ensure that the inner connecting portion 122 does not contact the first pole output 110 from the inner hole or the outside of the first heat-resistant insulating ring 150.

[0053] In some embodiments, the first heat-resistant insulating tube 140 can be provided separately. In other embodiments, the first heat-resistant insulating tube 140 and the first heat-resistant insulating ring 150 can also be provided simultaneously, and the two are separately provided. In still other embodiments, the first heat-resistant insulating tube 140 and the first heat-resistant insulating ring 150 can also be provided simultaneously, and the two are connected. Optionally, the inner ring of the first heat-resistant insulating ring 150 is connected to the outer wall of the first heat-resistant insulating tube 140.

[0054] Optionally, when the first heat-resistant insulating ring 150 is clamped between the end face of the inner connecting portion 122 facing away from the inside of the battery energy storage device and the first ring 131, the overall cross-section of the first heat-resistant insulating ring 150 and the first heat-resistant insulating tube 140 is L-shaped, which can prevent the first heat-resistant insulating ring 150 from moving axially along the middle connecting portion 121. When the first heat-resistant insulating ring 150 is clamped between the first ring 131 and the end face of the first pole output 110 facing the inside of the battery energy storage device, the first heat-resistant insulating ring 150 passes through the insulating component 130 and is connected to the first heat-resistant insulating tube 140, and the docking gap of the insulating component 130 can be set here, so that the first heat-resistant insulating ring 150 is partially clamped at the docking gap. The overall cross-section of the first heat-resistant insulating ring 150 and the first heat-resistant insulating tube 140 is similar to a T shape, which can also prevent the position of the first heat-resistant insulating ring 150 from changing in the axial direction of the middle connecting portion 121.

[0055] Optionally, the insulation assembly 130 includes a second ring 132, which is clamped between the end face of the outer connection part 123 facing the inside of the battery energy storage device and the end face of the first pole output 110 facing away from the inside of the battery energy storage device. The battery energy storage device structural assembly 100 further includes a second heat-resistant insulation ring 160, which is clamped between the end face of the outer connection part 123 facing the inside of the battery energy storage device and the second ring 132, or between the second ring 132 and the end face of the first pole output 110 facing away from the inside of the battery energy storage device. The material of the second heat-resistant insulation ring 160 is organic PTC thermistor, ceramic or mica, so that the second heat-resistant insulation ring 160 has an insulating effect when the battery energy storage device is out of control. When the second ring 132 melts during thermal runaway, the setting of the second heat-resistant insulation ring 160 can ensure the interval insulation between the end face of the outer connection part 123 facing the inside of the battery energy storage device and the end face of the first pole output 110 facing away from the inside of the battery energy storage device.

[0056] Similarly, optionally, the material of the second heat-resistant insulation ring 160 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 to prevent the short circuit between the positive output and the negative output of the battery energy storage device where the second heat-resistant insulation ring 160 is located.

[0057] Optionally, the material of the second heat-resistant insulation ring 160 can also be other ceramic materials except ceramic PTC thermistor. Ceramic materials generally have insulating properties.

[0058] Optionally, the material of the second heat-resistant insulation ring 160 can also be mica or composite mica. Composite mica is a composite material containing mica components, which can withstand heat and has good insulation performance at high temperature of thermal runaway.

[0059] Optionally, when the second heat-resistant insulating ring 160 is clamped between the end face of the outer connection portion 123 facing the inside of the battery energy storage device and the second ring 132, the inner ring of the second heat-resistant insulating ring 160 abuts against the middle connection portion 121, and the outer ring edge is flush with the edge of the outer connection portion 123 or the outer ring edge of the second heat-resistant insulating ring 160 protrudes beyond the edge of the outer connection portion 123. When the second heat-resistant insulating ring 160 is clamped between the second ring 132 and the end face of the first pole output 110 facing away from the inside of the battery energy storage device, the inner ring of the second heat-resistant insulating ring 160 abuts against the insulating component 130 or abuts against the middle connection portion 121 through the docking gap between the insulating components 130, and the outer ring edge is flush with the edge of the outer connection portion 123 or the outer ring edge of the second heat-resistant insulating ring 160 protrudes beyond the edge of the outer connection portion 123, so as to ensure that the outer connection portion 123 does not come into contact with the first pole output 110 from the inner hole or the outside of the second heat-resistant insulating ring 160.

[0060] In some embodiments, the first heat-resistant insulating tube 140 can be provided separately. In other embodiments, the first heat-resistant insulating tube 140 and the second heat-resistant insulating ring 160 can be provided simultaneously and are separately provided. In still other embodiments, the first heat-resistant insulating tube 140 and the second heat-resistant insulating ring 160 can be provided simultaneously and are connected. Optionally, the inner ring of the second heat-resistant insulating ring 160 is connected to the outer wall of the first heat-resistant insulating tube 140.

[0061] Optionally, when the second heat-resistant insulating ring 160 is clamped between the end face of the outer connection portion 123 facing the inside of the battery energy storage device and the second ring 132, the overall cross-section of the second heat-resistant insulating ring 160 and the first heat-resistant insulating tube 140 is L-shaped, which can prevent the second heat-resistant insulating ring 160 from moving axially along the middle connection portion 121. When the second heat-resistant insulating ring 160 is clamped between the second ring 132 and the end face of the first pole output 110 facing away from the inside of the battery energy storage device, the second heat-resistant insulating ring 160 is connected through the insulating component 130 and the first heat-resistant insulating tube 140, and the docking gap of the insulating component 130 can be set here so that the second heat-resistant insulating ring 160 is partially clamped at the docking gap. The overall cross-section of the second heat-resistant insulating ring 160 and the first heat-resistant insulating tube 140 is similar to a T-shape, which can also prevent the position of the second heat-resistant insulating ring 160 from changing in the axial direction of the middle connection portion 121.

[0062] Optionally, in still other embodiments, the first heat-resistant insulating tube 140, the first heat-resistant insulating ring 150, and the second heat-resistant insulating ring 160 can be provided simultaneously, with the three being separately provided, or one being separate and the other two being connected. In still other embodiments, the first heat-resistant insulating tube 140, the first heat-resistant insulating ring 150, and the second heat-resistant insulating ring 160 can be provided simultaneously and the three are connected. That is, as Figure 3As shown, the inner rings of the first heat-resistant insulating ring 150 and the second heat-resistant insulating ring 160 are both connected to the outer wall of the first heat-resistant insulating tube 140. Depending on the setting positions, the overall cross-section of the first heat-resistant insulating tube 140, the first heat-resistant insulating ring 150, and the second heat-resistant insulating ring 160 can be similar to a C shape, an F shape, or a horizontally placed π shape.

[0063] Optionally, the battery energy storage device structure assembly 100 further includes a second heat-resistant insulating tube (not shown in the figure). The second heat-resistant insulating tube is sleeved on the outside of the insulating assembly 130 and is clamped between the insulating assembly 130 and the inner wall of the through hole. The second heat-resistant insulating tube can further prevent a short circuit between the middle connecting portion 121 and the inner wall of the through hole.

[0064] Optionally, the material of the second heat-resistant insulating tube is an organic PTC thermistor, ceramic, or mica, so that the second heat-resistant insulating tube still has an insulating effect when the battery energy storage device is in thermal runaway. Optionally, the material of the second heat-resistant insulating tube is a ceramic PTC thermistor or an organic PTC thermistor, which can prevent a short circuit between the positive output and the negative output of the battery energy storage device where the second heat-resistant insulating tube is located.

[0065] Optionally, the material of the second heat-resistant insulating tube can also be other ceramic materials except for ceramic PTC thermistors. Ceramic materials generally have insulating properties.

[0066] Optionally, the material of the second heat-resistant insulating tube 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 temperatures during thermal runaway.

[0067] Optionally, the insulating assembly 130 includes an inner insulating ring 1301 and a sealing ring 1302 arranged in sequence along the axial direction of the second pole column 120. In this embodiment, the first ring 131 belongs to a part of the inner insulating ring 1301, and the sealing ring 1302 is the second ring 132. The battery energy storage device structure assembly 100 further includes a support connection ring (not shown in the figure). The support connection ring is clamped between the inner insulating ring 1301 and the sealing ring 1302, that is, the support connection ring is clamped at the docking gap between the inner insulating ring 1301 and the sealing ring 1302. The inner ring of the support connection ring is connected to the first heat-resistant insulating tube 140, and the outer ring of the support connection ring is connected to the second heat-resistant insulating tube. The support connection ring can fix the relative positions of the first heat-resistant insulating tube 140 and the second heat-resistant insulating tube to ensure that the two are located at concentric positions.

[0068] Optionally, the material of the support connection ring is an organic PTC thermistor, ceramic or mica, so that the support connection ring still has an insulating effect when the battery energy storage device is out of control due to heat. Optionally, the material of the support connection ring is a ceramic PTC thermistor or an organic PTC thermistor, which can prevent the positive output and negative output of the battery energy storage device where the support connection ring is located from being short-circuited.

[0069] Optionally, the material of the support connection ring can also be other ceramic materials except ceramic PTC thermistors, and ceramic materials generally have insulating properties.

[0070] Optionally, the material of the support connection ring can also be mica or composite mica. Composite mica is a composite material containing mica components, which can withstand heat and has good insulation performance at high temperatures during thermal runaway.

[0071] This embodiment also provides a battery energy storage device, including the above-mentioned battery energy storage device structure assembly 100. Optionally, in this embodiment, the first pole output 110 is the housing or the top cover plate. In this embodiment, when the battery energy storage device is a cylindrical battery as shown in Figure 4 , the first pole output 110 is the housing, and the battery cell 200 is arranged inside the housing. In other embodiments, the battery energy storage device can also be a square battery, and the first pole output 110 is the top cover plate electrically connected to the first pole terminal. Optionally, the second pole terminal 120 is the positive pole terminal, and the first pole output 110 is the negative output, or the second pole terminal 120 is the negative pole terminal, and the first pole output 110 is the positive output.

[0072] This battery energy storage device can ensure insulation between the middle connection part 121 of the second pole terminal 120 and the inner wall of the through hole of the first pole output 110. That is, even if the insulating component 130 melts during thermal runaway, the setting of the first heat-resistant insulating tube 140 can still help prevent short-circuiting between the second pole terminal 120 and the first pole output 110, that is, help avoid greater dangers and losses caused by short-circuiting between the positive output and the negative output.

[0073] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Structure components of a battery energy storage device, characterized in that Including: A first pole output (110) having a through hole formed therein; A second pole terminal (120) including a middle connection portion (121), and a part of the middle connection portion (121) is inserted into the through hole; An insulating assembly (130) sleeved on the middle connection portion (121), and a part of the insulating assembly (130) is clamped between the middle connection portion (121) and the inner wall of the through hole; A first heat-resistant insulating tube (140) sleeved on the middle connection portion (121), and the first heat-resistant insulating tube (140) is clamped between the middle connection portion (121) and the insulating assembly (130). The material of the first heat-resistant insulating tube (140) is an organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulating tube (140) has an insulating effect when the battery energy storage device is out of control due to heat; 2. The structural component of the battery energy storage device according to claim 1, wherein The material of the first heat-resistant insulating tube (140) is a ceramic PTC thermistor or an organic PTC thermistor; 3. The structural component of the battery energy storage device according to claim 1, wherein The second pole terminal (120) further includes an inner connection portion (122) connected to one end of the middle connection portion (121) close to the inside of the battery energy storage device. The inner connection portion (122) protrudes from the middle connection portion (121) along its own radial direction, and one end of the first heat-resistant insulating tube (140) abuts against the end face of the inner connection portion (122) facing away from the inside of the battery energy storage device; And / or, the second pole terminal (120) further includes an outer connection portion (123) connected to one end of the middle connection portion (121) far from the inside of the battery energy storage device. The outer connection portion (123) protrudes from the middle connection portion (121) along its own radial direction, and the other end of the first heat-resistant insulating tube (140) abuts against the end face of the outer connection portion (123) facing the inside of the battery energy storage device.

4. The structural component of the battery energy storage device according to claim 1, characterized in that, The second pole terminal (120) further includes an inner connection part (122). The inner connection part (122) is connected to one end of the middle connection part (121) close to the inside of the battery energy storage device. The inner connection part (122) protrudes radially from the middle connection part (121). The insulation assembly (130) includes a first ring (131). The first ring (131) is clamped between the end face of the inner connection part (122) facing away from the inside of the battery energy storage device and the end face of the first pole output (110) facing the inside of the battery energy storage device. The battery energy storage device structure assembly (100) further includes a first heat-resistant insulation ring (150). The first heat-resistant insulation ring (150) is clamped between the end face of the inner connection part (122) facing away from the inside of the battery energy storage device and the first ring (131), or clamped between the first ring (131) and the end face of the first pole output (110) facing the inside of the battery energy storage device. The material of the first heat-resistant insulation ring (150) is organic PTC thermistor, ceramic or mica, so that the first heat-resistant insulation ring (150) has an insulation function when the battery energy storage device is out of control due to heat.

5. The battery energy storage device structural component according to claim 4, wherein, The inner ring of the first heat-resistant insulation ring (150) is connected to the outer wall of the first heat-resistant insulation tube (140).

6. The structural component of the battery energy storage device according to any one of claims 1-5, characterized in that, The second pole terminal (120) further includes an outer connection part (123). The outer connection part (123) is connected to one end of the middle connection part (121) far from the inside of the battery energy storage device. The outer connection part (123) protrudes radially from the middle connection part (121). The insulation assembly (130) includes a second ring (132). The second ring (132) is clamped between the end face of the outer connection part (123) facing the inside of the battery energy storage device and the end face of the first pole output (110) facing away from the inside of the battery energy storage device. The battery energy storage device structure assembly (100) further includes a second heat-resistant insulation ring (160). The second heat-resistant insulation ring (160) is clamped between the end face of the outer connection part (123) facing the inside of the battery energy storage device and the second ring (132), or clamped between the second ring (132) and the end face of the first pole output (110) facing away from the inside of the battery energy storage device. The material of the second heat-resistant insulation ring (160) is organic PTC thermistor, ceramic or mica, so that the second heat-resistant insulation ring (160) has an insulation function when the battery energy storage device is out of control due to heat.

7. The structural component of the battery energy storage device according to claim 6, characterized in that, The inner ring of the second heat-resistant insulation ring (160) is connected to the outer wall of the first heat-resistant insulation tube (140).

8. The battery energy storage device structural component according to any one of claims 1-5, characterized in that, The battery energy storage device structure assembly (100) further includes a second heat-resistant insulation tube. The second heat-resistant insulation tube is sleeved on the outside of the insulation assembly (130) and clamped between the insulation assembly (130) and the inner wall of the through hole.

9. The battery energy storage device structural component according to claim 8, characterized in that, The structural component (100) of the battery energy storage device further includes a support connection ring. The insulation component (130) includes an inner insulation ring (1301) and a sealing ring (1302) arranged in sequence along the axial direction of the second pole column (120). The support connection ring is clamped between the inner insulation ring (1301) and the sealing ring (1302). The inner ring of the support connection ring is connected to the first heat-resistant insulation tube (140), and the outer ring of the support connection ring is connected to the second heat-resistant insulation tube.

10. Battery energy storage device, characterized in that, It includes the structural component of the battery energy storage device according to any one of claims 1-9, and the first pole output (110) is a housing or a top cover plate.

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