Cover plate assembly and energy storage battery

Abstract

The utility model provides a cover plate assembly and an energy storage battery, the cover plate assembly comprises a sealing cover, an output electrode and a temperature-resistant member, the sealing cover comprises a top surface and a bottom surface which are distributed along the thickness direction of the sealing cover, the sealing cover is provided with a mounting hole, and the mounting hole penetrates through the top surface and the bottom surface of the sealing cover along the thickness direction; the output electrode is mounted in the mounting hole and comprises a pressing ring opposite to the top surface; the temperature-resistant piece is arranged between the top face and the pressing ring so that a gap can exist between the sealing cover and the pressing ring. Due to the high-temperature-resistant characteristic of the temperature-resistant part, when the upper insulating part of the cover plate assembly is subjected to melting softening deformation to a certain degree under the influence of the high temperature of a core bag of the energy storage battery, the temperature-resistant part cannot be subjected to large deformation under the influence of the high temperature, so that the temperature-resistant part can support the upper insulating part or a pressing ring of an output electrode; and a certain interval is always kept between the compression ring of the output electrode and the top surface of the sealing cover, so that the risk of short circuit caused by contact between the compression ring of the output electrode and the top surface of the sealing cover is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage batteries, in particular to a cover plate assembly and an energy storage battery. BACKGROUND

[0002] In the related art, the top surface of the cover of the cover plate assembly of the energy storage battery is insulated and isolated from the output pole by the upper insulating piece. When the heat generated during the operation of the core package is large, the upper insulating piece of the cover plate assembly will melt and soften and deform to a certain extent, which may cause the risk of short circuit due to the contact between the output pole and the cover. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a cover plate assembly and an energy storage battery, which can improve the technical problem that the output pole contacts the cover due to the melting and softening deformation of the upper insulating piece of the cover plate assembly caused by the high temperature generated by the core package of the energy storage battery.

[0004] In a first aspect, the embodiments of the present application provide a cover plate assembly, comprising:

[0005] a cover comprising a top surface and a bottom surface distributed along a thickness direction thereof, the cover being provided with a mounting hole penetrating through the top surface and the bottom surface of the cover along the thickness direction;

[0006] an output pole mounted in the mounting hole, the output pole comprising a compression ring arranged opposite to the top surface;

[0007] a temperature-resistant piece arranged between the top surface and the compression ring to form a gap between the cover and the compression ring.

[0008] In some embodiments, the cover plate assembly further comprises an upper insulating piece arranged on the top surface of the cover, the upper insulating piece comprising an insulating portion between the compression ring and the top surface, one end of the temperature-resistant piece abutting against the top surface, and the other end of the temperature-resistant piece abutting against the insulating portion.

[0009] In some embodiments, the insulating portion is provided with a receiving hole extending along the thickness direction, the receiving hole being a blind hole, and the opening of the receiving hole being located on the side of the insulating portion close to the top surface; at least part of the temperature-resistant piece is accommodated in the receiving hole.

[0010] In some embodiments, the temperature-resistant piece is an insulating piece, one end of the temperature-resistant piece abutting against the top surface, and the other end of the temperature-resistant piece abutting against the compression ring.

[0011] In some embodiments, the cover plate assembly further comprises an upper insulating member arranged on the top surface of the cover, the upper insulating member comprising an insulating portion between the compression ring and the top surface, the insulating portion being provided with a receiving hole extending along the thickness direction, the receiving hole penetrating through the insulating portion, and the temperature-resistant member penetrating through the receiving hole.

[0012] In some embodiments, the compression ring is provided with a positioning groove on the side facing the cover, and at least a portion of the temperature-resistant member is arranged in the positioning groove.

[0013] In some embodiments, a portion of the temperature-resistant member on the side close to the output pole axis is arranged in the positioning groove, and another portion of the temperature-resistant member is in abutment with the upper insulating member.

[0014] In some embodiments, the number of the temperature-resistant members is multiple, and the multiple temperature-resistant members are arranged along the circumferential direction of the output pole.

[0015] In some embodiments, the temperature-resistant member extends along the circumferential direction of the output pole, and the temperature-resistant member has a ring structure.

[0016] In some embodiments, the material of the temperature-resistant member comprises ceramic.

[0017] In some embodiments, the output pole comprises a pole column penetrating through the mounting hole, and the compression ring is protruded on the outer periphery of the pole column.

[0018] In a second aspect, embodiments of the present application provide a battery, comprising the cover plate assembly as described above, and the cover plate assembly comprises:

[0019] a cover comprising a top surface and a bottom surface distributed along the thickness direction thereof, the cover being provided with a mounting hole penetrating through the top surface and the bottom surface of the cover along the thickness direction;

[0020] an output pole mounted in the mounting hole, the output pole comprising a compression ring arranged opposite to the top surface;

[0021] a temperature-resistant member arranged between the top surface and the compression ring to form a gap between the cover and the compression ring.

[0022] The embodiments of the present application have the following beneficial effects:

[0023] In the embodiment of the present application, the temperature-resistant piece is arranged between the compression ring of the output pole of the cover plate assembly and the bottom surface of the cover, so that there is a gap between the cover and the compression ring. Due to the high-temperature resistance of the temperature-resistant piece, when the upper insulating piece of the cover plate assembly is deformed to a certain extent due to the high temperature of the core package of the energy storage battery, the temperature-resistant piece will not deform greatly under the influence of high temperature, so that the temperature-resistant piece can support the upper insulating piece or the compression ring of the output pole, so that the compression ring of the output pole and the top surface of the cover always maintain a certain gap, thereby reducing the risk of short circuit caused by the contact between the compression ring of the output pole and the top surface of the cover. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is an exploded structural schematic view of one embodiment of the cover plate assembly provided by the present application;

[0026] Figure 2 is a sectional view of one embodiment of the cover plate assembly provided by the present application, wherein the sectioning surface is perpendicular to the width direction of the cover;

[0027] Figure 3 is Figure 2 is an enlarged view of A in

[0028] Figure 4 is a partial view of a sectional view of another embodiment of the cover plate assembly provided by the present application, wherein the sectioning surface is perpendicular to the width direction of the cover;

[0029] Figure 5 is a top view of one embodiment of the temperature-resistant piece provided by the present application;

[0030] Figure 6 is a top view of another embodiment of the temperature-resistant piece provided by the present application.

[0031] cover plate assembly 100; cover 110; exhaust structure 1101; mounting hole 1102; bottom surface 1103; top surface 1104; positioning groove 1105; lower insulating piece 120; explosion-proof valve 140; upper insulating piece 160; insulating part 161; accommodating hole 1611; temperature-resistant piece 170; output pole 180; compression ring 181; pole column 182; sealing structure 190; thickness direction Z. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower directions of the device in the actual use or working state, and specifically refer to the drawing direction in the drawings; and "inner" and "outer" refer to the contour of the device.

[0033] In the related art, the top surface of the cover of the cover plate assembly of the energy storage battery is insulated and isolated from the output pole by the upper insulating piece. When the heat generated during the operation of the core package is large, the upper insulating piece of the cover plate assembly will be deformed to a certain extent due to melting and softening, which may cause the risk of short circuit due to the contact between the output pole and the cover.

[0034] At the same time, after the upper insulating piece is deformed to a certain extent due to melting and softening, the compression amount of the sealing structure between the output pole and the cover may change, which may cause the sealing effect of the sealing structure to weaken. When the pressure in the energy storage battery is too large, the risk of leakage of the electrolyte in the energy storage battery from the gap between the output pole and the cover may occur.

[0035] The present application provides a cover plate assembly and an energy storage battery.

[0036] Figure 1 is an exploded structural schematic view of one embodiment of the cover plate assembly provided by the present application. Figure 2 is a sectional view of one embodiment of the cover plate assembly provided by the present application, wherein the sectioning surface is perpendicular to the width direction of the cover. Figure 3 is Figure 2 is an enlarged view of A in FIG. 1. Figures 1 to 3 As shown in FIG. 1, the cover plate assembly 100 includes a cover 110, which includes a top surface 1104 and a bottom surface 1103 distributed along the thickness direction thereof. The cover 110 is provided with a mounting hole 1102, which penetrates the top surface 1104 and the bottom surface 1103 of the cover 110 along the thickness direction of the cover 110.

[0037] The cover plate assembly 100 further includes an output pole 180, which is mounted in the mounting hole 1102 of the cover 110, and the output pole 180 includes a compression ring 181 arranged opposite to the top surface 1104.

[0038] In some embodiments, the cover plate assembly 100 can further include a temperature-resistant piece 170 arranged between the top surface 1104 of the cover 110 and the compression ring 181 of the output pole 180, so that the cover 110 is spaced apart from the compression ring 181.

[0039] The cover plate assembly 100 provided by the embodiments of the present application sets the temperature-resistant piece 170 between the compression ring 181 of the output pole 180 and the bottom surface 1103 of the cover 110, so that the cover 110 is spaced apart from the compression ring 181. Due to the high-temperature resistance of the temperature-resistant piece 170, when the upper insulating piece 160 of the cover plate assembly 100 is deformed to a certain extent due to the high temperature of the core package of the energy storage battery, the temperature-resistant piece 170 will not be deformed greatly under the influence of high temperature, so that the temperature-resistant piece 170 can support the upper insulating piece 160 or the compression ring 181 of the output pole 180, so that the compression ring 181 of the output pole 180 and the top surface 1104 of the cover 110 always maintain a certain interval, thereby reducing the risk of short circuit caused by the contact between the compression ring 181 of the output pole 180 and the top surface 1104 of the cover 110.

[0040] Moreover, the temperature-resistant piece 170 keeps the compression ring 181 of the output pole 180 and the top surface 1104 of the cover 110 always at a certain interval, which can reduce the compression amount change of the sealing structure 190 between the output pole 180 and the cover 110 when the upper insulating piece 160 is deformed to a certain extent, thereby reducing the risk of leakage of electrolyte in the energy storage battery due to the failure of the sealing structure 190 between the output pole 180 and the cover 110.

[0041] In the embodiments of the present application, the melting temperature of the temperature-resistant piece 170 can be greater than the melting temperature of the upper insulating piece 160, so that when the upper insulating piece 160 is deformed or even melted under the action of high temperature, the temperature-resistant piece 170 has less melting or deformation, and can support the upper insulating piece 160 or the compression ring 181 of the output pole 180. In this way, the melting temperature of the temperature-resistant piece 170 can be greater than the thermal runaway temperature of the battery cell, so that when the battery cell is in thermal runaway, the temperature-resistant piece 170 will not deform greatly, and still has a good supporting effect on the upper insulating piece 160 or the compression ring 181 of the output pole 180.

[0042] In some embodiments, the temperature-resistant piece 170 is an insulating piece. In this way, when the upper insulating piece 160 is deformed to a certain extent, the temperature-resistant piece 170 passes through the abutting portion of the upper insulating piece 160 and the compression ring 181 of the output pole 180, which can avoid the compression ring 181 of the output pole 180 from being conducted through the temperature-resistant piece 170 and the cover 110. The material of the temperature-resistant piece 170 can include ceramic or other insulating materials that can withstand high temperature, which is not limited herein.

[0043] In some embodiments, as shown in FIG. 1, the temperature-resistant piece 170 can be arranged between the top surface 1104 of the cover 110 and the compression ring 181 of the output pole 180, so that the cover 110 is spaced apart from the compression ring 181. Figure 3As shown, one end of the heat-resistant component 170 can abut against the top surface 1104 of the cover 110, and the other end of the heat-resistant component 170 can abut against the pressure ring 181 of the output electrode 180. Thus, the heat-resistant component 170 is directly supported between the top surface 1104 of the cover 110 and the connection of the output electrode 180, which makes the gap between the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110 more stable and less susceptible to the influence of the melting, softening and deformation of the upper insulating component 160.

[0044] like Figures 1 to 3 As shown, the cover assembly 100 also includes an upper insulating member 160, which is disposed on the top surface 1104 of the cover 110. The upper insulating member 160 includes an insulating portion 161 located between the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110. The insulating portion 161 can support the pressure ring 181 of the output electrode 180, preventing the pressure ring 181 of the output electrode 180 from contacting the top surface 1104 of the cover 110. At the same time, the insulating portion 161 can also provide a certain degree of sealing between the output electrode 180 and the cover 110.

[0045] In some embodiments, a receiving hole 1611 extending in the thickness direction may be provided in the insulating portion 161 of the upper insulating member 160, and at least a portion of the heat-resistant member 170 may be received in the receiving hole 1611, thereby allowing the insulating portion 161 of the upper insulating member 160 to avoid interference between the heat-resistant member 170 and the insulating portion 161 of the upper insulating member 160. Moreover, by having at least a portion of the heat-resistant member 170 received in the receiving hole 1611 of the upper insulating member 160, the position of the heat-resistant member 170 relative to the output electrode 180 can be made more stable, which is beneficial for the heat-resistant member 170 to provide more stable direct or indirect support to the pressure ring 181 of the output electrode 180.

[0046] The receiving hole 1611 can pass through the insulating part 161, and the heat-resistant member 170 can pass through the receiving hole 1611, so that one end of the heat-resistant member 170 can abut against the top surface 1104 of the cover 110, and the other end of the heat-resistant member 170 can abut against the pressure ring 181 of the output electrode 180.

[0047] Figure 4 This is a partial cross-sectional view of another embodiment of the cover assembly provided in this application, wherein the cutting plane is perpendicular to the width direction of the cover. In other embodiments, such as Figure 4As shown, one end of the heat-resistant component 170 can abut against the top surface 1104, and the other end of the heat-resistant component 170 can abut against the insulating part 161. Thus, the heat-resistant component 170 can indirectly abut against the pressure ring 181 of the output electrode 180 through the insulating part 161. When the upper insulating part 160 of the cover assembly 100 undergoes a certain degree of melting, softening, and deformation under the high temperature of the battery pack, the heat-resistant component 170 will not undergo significant deformation under the influence of high temperature. This allows the heat-resistant component 170 to support the insulating part 161 of the upper insulating part 160, ensuring stable support for the pressure ring 181 of the output electrode 180. This maintains a certain distance between the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110, reducing the risk of a short circuit due to contact between the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110.

[0048] Furthermore, when the upper insulating member 160 of the cover assembly 100 undergoes significant melting and softening deformation under the influence of the high temperature of the battery pack, the heat-resistant member 170 can pass through the insulating part 161 of the insulating member and abut against the pressure ring 181 of the output electrode 180 to provide stable support for the pressure ring 181 of the output electrode 180. This ensures that the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110 always maintain a certain distance, thereby reducing the risk of short circuit caused by contact between the pressure ring 181 of the output electrode 180 and the top surface 1104 of the cover 110.

[0049] Among them, such as Figure 4 As shown, the receiving hole 1611 can be a blind hole, with the opening of the receiving hole 1611 located on the side of the insulating portion 161 of the upper insulating member 160 near the top surface 1104 of the cover 110. Thus, when at least a portion of the heat-resistant member 170 is received in the receiving hole 1611, the end of the heat-resistant member 170 away from the bottom surface 1103 of the cover 110 can abut against the portion of the insulating portion 161 of the upper insulating member 160 near the closed end of the receiving hole 1611, thereby indirectly abutting against the pressure ring 181 of the output electrode 180 through the insulating portion 161 of the upper insulating member 160.

[0050] In some embodiments, such as Figure 3 As shown, a positioning groove 1105 can be provided on the side of the pressure ring 181 facing the cover 110, and at least a portion of the heat-resistant component 170 is located in the positioning groove 1105. Therefore, the positioning groove 1105 can be used to position the heat-resistant component 170 relative to the output electrode 180, allowing the heat-resistant component 170 to provide more stable direct or indirect support to the pressure ring 181 of the output electrode 180.

[0051] The temperature-resistant piece 170 can be arranged to abut against the bottom of the positioning groove 1105 at one end away from the top surface 1104 of the cover 110, so that the temperature-resistant piece 170 directly supports the compression ring 181 of the output pole 180.

[0052] Alternatively, as shown in FIG. 6, at least a portion of the insulating part 161 of the upper insulating piece 160 can be arranged in the positioning groove 1105, and the insulating part 161 of the upper insulating piece 160 abuts against the bottom of the positioning groove 1105 at one side away from the top surface 1104 of the cover 110. The closed end of the accommodating hole 1611 extends into the positioning groove 1105 along the thickness direction of the cover 110, and one end of the temperature-resistant piece 170 away from the top surface 1104 of the cover 110 extends into the positioning groove 1105 and abuts against the portion of the insulating part 161 close to the closed end of the accommodating hole 1611. Figure 4 In some embodiments, a portion of the temperature-resistant piece 170 close to the axis of the output pole 180 can be arranged in the positioning groove 1105, and the other portion of the temperature-resistant piece 170 abuts against the upper insulating piece 160, so that the temperature-resistant piece 170 can more stably support the output pole 180.

[0053] In some embodiments, as shown in FIG. 6, the number of temperature-resistant pieces 170 can be multiple, and the multiple temperature-resistant pieces 170 are arranged along the circumference of the output pole 180. The multiple temperature-resistant pieces 170 can more stably support the compression ring 181 of the output pole 180, thereby further reducing the risk of the compression ring 181 of the output pole 180 contacting the top surface 1104 of the cover 110. The number of temperature-resistant pieces 170 can be 2, 3, 4 or more, which can be determined according to the shape and material of the temperature-resistant piece 170.

[0054] Figure 1 Specifically, the lower insulating piece 160 is provided with multiple accommodating holes 1611. The number of the multiple accommodating holes 1611 is equal to the number of the multiple temperature-resistant pieces 170, and at least a portion of the multiple temperature-resistant pieces 170 are one-to-one accommodated in the multiple accommodating holes 1611.

[0055] In some embodiments, the temperature-resistant piece 170 can extend along the circumference of the output pole 180, thereby increasing the contact area of the temperature-resistant piece 170 with the insulating part 161 of the upper insulating piece 160 or the compression ring 181 of the output pole 180, to more stably support the compression ring 181 of the output pole 180. The temperature-resistant piece 170 can be in a ring structure, so that the temperature-resistant piece 170 can more stably support the output pole 180.

[0056] In some embodiments, the temperature-resistant piece 170 can extend along the circumference of the output pole 180, thereby increasing the contact area of the temperature-resistant piece 170 with the insulating part 161 of the upper insulating piece 160 or the compression ring 181 of the output pole 180, to more stably support the compression ring 181 of the output pole 180. The temperature-resistant piece 170 can be in a ring structure, so that the temperature-resistant piece 170 can more stably support the output pole 180.

[0057] ​Specifically, the output pole 180 includes a pole column 182 which passes through the mounting hole 1102, and a compression ring 181 which is protruded on the outer periphery of the pole column 182. The compression ring 181 extends along the circumference of the pole column 182 in a ring structure. The pole column 182 extends out of one end of the compression ring 181 for connection with the bus bar. The temperature-resistant piece 170 extends along the circumference of the pole column 182 in a ring structure. The positioning groove 1105 extends along the circumference of the compression ring 181 in a ring structure. The positioning groove 1105 is formed with a notch on the outer periphery of the compression ring 181. The pole column 182 is connected with the compression ring 181 through clamping, riveting, welding or the like. Of course, the pole column 182 can also be integrated with the compression ring 181.

[0058] The end of the pole column 182 away from the compression ring 181 passes through the mounting hole 1102 of the cover 110, and the outer periphery of the end of the pole column 182 away from the compression ring 181 is protruded with a flange which is used to abut against the bottom surface 1103 of the cover 110 through the sealing structure 190 or the lower insulating piece 120, so as to limit the movement of the pole column 182 along the thickness direction Z relative to the cover 110, and avoid the short circuit between the pole column 182 and the cover 110.

[0059] The sealing structure 190 is a sealing ring which is arranged around the pole column 182. One side of the sealing structure 190 abuts against the side of the flange which faces the bottom surface 1103 of the cover 110, and the other side of the sealing structure 190 abuts against the bottom surface 1103 of the cover 110, so as to seal the gap between the flange of the pole column 182 and the bottom surface 1103 of the cover 110. Through the support of the temperature-resistant piece 170 to the compression ring 181 of the output pole 180, the distance between the flange of the pole column 182 and the bottom surface 1103 of the cover 110 cannot be increased, so that the pressing force of the flange of the pole column 182 and the bottom surface 1103 of the cover 110 on the sealing structure 190 is larger, so as to facilitate the sealing effect of the sealing structure 190.

[0060] Figure 5 is a top view of one embodiment of the temperature-resistant piece provided by the present application. In other embodiments, as shown in Figure 5 the temperature-resistant piece 170 can also be a column structure which extends along the thickness direction, so that the temperature-resistant piece 170 has higher structural strength. Specifically, the temperature-resistant piece 170 can be a cylindrical structure, a quadrangular prism structure or the like.

[0061] Figure 6 is a top view of another embodiment of the temperature-resistant piece provided by the present application. As shown in Figure 6 the temperature-resistant piece 170 can also be a barrel structure which extends along the thickness direction, so that the temperature-resistant piece 170 has better support effect on the compression ring 181 of the output pole 180 or the insulating part 161 of the upper insulating piece 160, while reducing the material of the temperature-resistant piece 170, so as to reduce the cost of the temperature-resistant piece 170.

[0062] In some embodiments, the cover plate assembly 100 further comprises a lower insulating member 120, which is arranged opposite to the bottom surface 1103 of the cover 110. When the cover plate assembly 100 is used in an energy storage battery, the lower insulating member 120 of the cover plate assembly 100 is located on the side of the cover 110 facing the core pack of the energy storage battery, so as to insulate and separate the cover 110 and the core pack by the lower insulating member 120.

[0063] As shown in Figure 1 The cover 110 is provided with an exhaust structure 1101, which can be exhausted when the pressure inside the energy storage battery is too high. The exhaust structure 1101 can be formed by opening an exhaust hole in the cover 110. The cover plate assembly 100 can further comprise an explosion-proof valve 140 arranged at the exhaust hole. When the pressure inside the energy storage battery increases to a certain value, the explosion-proof valve 140 opens, allowing the high-pressure gas inside the energy storage battery to quickly exhaust through the exhaust hole.

[0064] Of course, the explosion-proof valve 140 of the integrated structure can also be directly arranged on the cover 110 to form the exhaust structure 1101. Specifically, a notch can be arranged on the cover 110 to form the explosion-proof valve 140. When the pressure inside the energy storage battery is too high, the notch breaks under the action of the gas pressure to form the exhaust hole of the exhaust structure 1101.

[0065] In the embodiments of the present application, the materials of the upper insulating member 160 and the lower insulating member 120 can be plastic or other insulating materials, which are not limited here.

[0066] The embodiments of the present application also provide an energy storage battery, which comprises a cover plate assembly. The specific structure of the cover plate assembly is referred to the above-mentioned embodiments. Since the energy storage battery adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0067] The energy storage battery provided by the embodiments of the present application sets a temperature-resistant member 170 between the pressing ring 181 of the output pole 180 of the cover plate assembly 100 and the bottom surface 1103 of the cover 110, so that there is a gap between the cover 110 and the pressing ring 181. Due to the high-temperature resistance of the temperature-resistant member 170, when the upper insulating member 160 of the cover plate assembly 100 is deformed to a certain extent due to the high temperature of the core pack of the energy storage battery, the temperature-resistant member 170 will not deform greatly under the influence of high temperature, so that the temperature-resistant member 170 can support the upper insulating member 160 or the pressing ring 181 of the output pole 180, and the pressing ring 181 of the output pole 180 and the top surface 1104 of the cover 110 always maintain a certain gap, thereby reducing the risk of short circuit caused by the contact between the pressing ring 181 of the output pole 180 and the top surface 1104 of the cover 110.

[0068] Moreover, the compression ring 181 of the output pole 180 and the top surface 1104 of the cover 110 are always kept a certain interval by the temperature-resistant piece 170, and when the upper insulating piece 160 is deformed to a certain extent due to melting and softening, the compression amount change of the sealing structure 190 between the output pole 180 and the cover 110 can be reduced, which is beneficial to reduce the risk of leakage of the electrolyte in the energy storage battery from between the output pole 180 and the cover 110 due to failure of the sealing structure 190, and is beneficial to improve the safety of the energy storage battery.

[0069] In the energy storage battery, the cover plate assembly 100 can include the cover 110 and the gasket 120, and the cover 110 can include the top surface 1104 and the bottom surface 1103.

[0070] The above describes the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed, and the above description of the present application should not be understood as a limitation.

Claims

1. A cover plate assembly, characterized in that, include: A cap includes a top surface and a bottom surface distributed along its thickness direction, and the cap has a mounting hole that penetrates the top surface and the bottom surface of the cap along the thickness direction; An output electrode is installed in the mounting hole, and the output electrode includes a pressure ring disposed opposite to the top surface; A heat-resistant component is disposed between the top surface and the pressure ring, so that there is a gap between the cover and the pressure ring.

2. The cover plate assembly as claimed in claim 1, characterized in that, The cover plate assembly further includes an upper insulating member disposed on the top surface of the cover. The upper insulating member includes an insulating portion located between the pressure ring and the top surface. One end of the heat-resistant member abuts against the top surface, and the other end of the heat-resistant member abuts against the insulating portion.

3. The cover plate assembly as claimed in claim 2, characterized in that, The insulating part has a receiving hole extending along the thickness direction. The receiving hole is a blind hole, and the opening of the receiving hole is located on the side of the insulating part near the top surface. At least a portion of the heat-resistant element is received in the receiving hole.

4. The cover plate assembly as claimed in claim 1, characterized in that, The heat-resistant component is an insulating component, with one end abutting against the top surface and the other end abutting against the pressure ring.

5. The cover plate assembly as claimed in claim 4, characterized in that, The cover plate assembly further includes an upper insulating member disposed on the top surface of the cover. The upper insulating member includes an insulating portion located between the pressure ring and the top surface. The insulating portion has a receiving hole extending along the thickness direction, the receiving hole penetrating the insulating portion, and the heat-resistant member passing through the receiving hole.

6. The cover plate assembly as claimed in claim 5, characterized in that, The pressure ring has a positioning groove on the side facing the cover, and at least a portion of the heat-resistant component is located in the positioning groove.

7. The cover plate assembly according to claim 6, characterized in that, A portion of the heat-resistant component, located near the output pole axis, is situated within the positioning groove, while the other portion abuts against the upper insulating component.

8. The cover plate assembly as claimed in any one of claims 1 to 7, characterized in that, The number of heat-resistant components is multiple, and the multiple heat-resistant components are arranged circumferentially along the output electrode.

9. The cover plate assembly as claimed in any one of claims 1 to 7, characterized in that, The heat-resistant element extends circumferentially along the output electrode; the heat-resistant element has a ring structure.

10. The cover plate assembly as claimed in any one of claims 1 to 7, characterized in that, The material of the heat-resistant component includes ceramic.

11. The cover plate assembly as claimed in any one of claims 1 to 7, characterized in that, The output electrode includes a terminal post that passes through the mounting hole, and the pressure ring protrudes from the outer periphery of the terminal post.

12. An energy storage battery, characterized in that, Includes the cover plate assembly as described in any one of claims 1 to 11.

Images