Cover plate assembly and energy storage battery

Abstract

The invention provides a cover plate assembly and an energy storage battery, the cover plate assembly comprises a sealing cover, a lower insulating part and a first temperature-resistant part, and the sealing cover is provided with an exhaust structure; the lower insulating part and the sealing cover are oppositely arranged; the first temperature-resistant part is mounted between the sealing cover and the lower insulating part, so that the sealing cover and the lower insulating part are spaced at the exhaust structure, and the first temperature-resistant part is fixedly connected with the sealing cover or the lower insulating part. When the lower insulating part of the cover plate assembly is melted, softened and deformed to a certain extent under the influence of the high temperature of the core package of the energy storage battery, the first temperature-resistant part does not deform greatly under the influence of the high temperature, so that the first temperature-resistant part can support the lower insulating part or the core package; and the core package does not move towards the sealing cover and blocks the exhaust structure of the sealing cover, so that high-pressure gas in the energy storage battery can be continuously exhausted through the exhaust structure.

Description

Technical Field

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

[0002] In the related art, the cover of the cover assembly of the energy storage battery is insulated from the core package by a lower insulating member. When the heat generated during the operation of the core package is large, the lower insulating member of the cover assembly undergoes a certain degree of melting, softening and deformation, which may cause the core package to move toward the cover and block the exhaust structure of the cover, making it impossible for the explosion-proof valve installed in the exhaust structure to release pressure in time, thereby causing the energy storage battery to explode. Summary of the invention

[0003] The embodiments of the present application provide a cover plate assembly and an energy storage battery, which can improve the technical problem that after the high temperature generated by the core pack of the energy storage battery causes the lower insulating part of the cover plate assembly to melt, soften and deform, the core pack moves toward the cover of the cover plate assembly and blocks the exhaust structure of the cover.

[0004] In a first aspect, an embodiment of the present application provides a cover plate assembly, comprising:

[0005] The cover is provided with an exhaust structure;

[0006] A lower insulating member, arranged opposite to the sealing cover;

[0007] The first temperature-resistant component is installed between the sealing cover and the lower insulating component so that there is a gap between the sealing cover and the lower insulating component at the exhaust structure, and the first temperature-resistant component is fixedly connected to the sealing cover or the lower insulating component.

[0008] In some embodiments, the first temperature-resistant component is connected to the cover by welding, or the first temperature-resistant component is connected to the lower insulating component by injection molding.

[0009] In some embodiments, the first temperature-resistant part includes a supporting portion and at least one connecting portion, the supporting portion is used to abut against the lower insulating member, the at least one connecting portion is protruded from the supporting portion, and the connecting portion is used to be welded to the cover.

[0010] In some embodiments, the connecting portion is protrudingly provided on a side of the supporting portion facing the sealing cover; and / or,

[0011] The connecting portion is protrudingly provided on at least one side of the support portion along the length direction or the width direction of the cover, and the length direction, the width direction and the thickness direction of the cover are perpendicular to each other.

[0012] In some embodiments, there are multiple connecting parts, and the multiple connecting parts are respectively connected to the cover by welding.

[0013] In some embodiments, the plurality of connecting portions are distributed on both side edges of the supporting portion along the length direction, and the plurality of connecting portions located on the same side edge of the supporting portion are spaced apart along the width direction; or,

[0014] The plurality of connecting portions are distributed on both side edges of the supporting portion along the width direction, and the plurality of connecting portions located on the same side edge of the supporting portion are spaced apart along the length direction.

[0015] In some embodiments, the plurality of connecting portions are distributed on both sides of the exhaust structure along the length direction; and / or, the plurality of connecting portions are distributed on both sides of the exhaust structure along the width direction.

[0016] In some embodiments, the lower insulating member includes a first protrusion arranged corresponding to the exhaust structure, the first protrusion is provided with a through hole connected to the exhaust structure, and the first temperature-resistant member is installed between the cover and the first protrusion.

[0017] In some embodiments, a first accommodating cavity is formed between the first protrusion and the cover, the through hole and the exhaust structure are respectively connected to the first accommodating cavity, and at least a portion of the first temperature-resistant component is located in the first accommodating cavity.

[0018] In some embodiments, an abutment protrusion is protruded from one side of the first protrusion toward the cover, the abutment protrusion is located in the first accommodating cavity, and the abutment protrusion abuts against a side of the first temperature-resistant component away from the cover so that the first temperature-resistant component is spaced apart from the through hole.

[0019] In some embodiments, the first temperature-resistant member includes a supporting portion and a plurality of connecting portions, the supporting portion is used to abut against the abutting protrusion, the supporting portion is provided with a through hole, and the through hole penetrates the supporting portion along the thickness direction of the cover; the plurality of connecting portions are arranged at intervals and are used to connect with the cover;

[0020] Among them, the through hole includes a first through hole opened on the bottom surface of the first accommodating cavity, and the first through hole is arranged opposite to the via hole; the through hole also includes a second through hole opened on the side surface of the first accommodating cavity, and the second through hole is arranged opposite to the interval between two adjacent connecting parts.

[0021] In some embodiments, the abutment protrusion includes a first protrusion portion and a second protrusion portion, the first protrusion portion and the second protrusion portion respectively abut against a side of the first temperature resistant part away from the cover, the extension directions of the first protrusion portion and the second protrusion portion are set at an angle, and the extension directions of the first protrusion portion and the second protrusion portion are respectively set at an angle to the thickness direction of the cover.

[0022] In some embodiments, the lower insulating member includes two sub-plastics separately disposed along the length direction of the cover, the first protrusion includes sub-protrusions distributed on the two sub-plastics, and the first accommodating cavity is formed between the two sub-protrusions and the cover.

[0023] In some embodiments, the first temperature-resistant member includes at least two sub-temperature-resistant members spaced apart from each other, and the at least two sub-temperature-resistant members are respectively installed between the cover and the lower insulating member, so that there is a space between the cover and the lower insulating member at the exhaust structure.

[0024] In some embodiments, each of the sub-protrusions is disposed corresponding to at least one of the sub-temperature-resistant components.

[0025] In some embodiments, the cover plate assembly further includes at least one second temperature resistant component, which is disposed on a side of the cover facing the lower insulating component and is located at an end of the cover in a length direction.

[0026] In some embodiments, the lower insulating member includes at least one second protrusion, a second accommodating cavity is formed on a side of the second protrusion facing the cover, and the second temperature-resistant member is disposed in the second accommodating cavity.

[0027] In some embodiments, the cover plate assembly includes two second temperature resistant parts, which are located at both ends of the length direction of the cover; the lower insulating part includes two second protrusions, and the two second protrusions are respectively formed with the second accommodating cavities on one side facing the cover, and the two second temperature resistant parts are arranged in the two second accommodating cavities one by one.

[0028] In some embodiments, the material of the second temperature-resistant component includes metal and / or ceramic; the second temperature-resistant component is connected to the cover by welding, or the second temperature-resistant component is connected to the lower insulating component by injection molding.

[0029] In some embodiments, the material of the first temperature-resistant component includes metal and / or ceramic.

[0030] In a second aspect, an embodiment of the present application provides an energy storage battery, comprising the cover plate assembly as described above, wherein the cover plate assembly comprises:

[0031] The cover is provided with an exhaust structure;

[0032] A lower insulating member, arranged opposite to the sealing cover;

[0033] The first temperature-resistant component is installed between the sealing cover and the lower insulating component so that there is a gap between the sealing cover and the lower insulating component at the exhaust structure, and the first temperature-resistant component is fixedly connected to the sealing cover or the lower insulating component.

[0034] Beneficial effects of the embodiments of the present application:

[0035] In an embodiment of the present application, a first heat-resistant part is provided between the lower insulating part and the sealing cover of the cover plate assembly, and the first heat-resistant part is fixedly connected to the sealing cover or the lower insulating part, so that there is a gap between the sealing cover and the lower insulating part at the exhaust structure of the sealing cover, thereby enabling the position of the first heat-resistant part to remain stable, and due to the high temperature resistance of the first heat-resistant part, when the lower insulating part of the cover plate assembly undergoes a certain degree of melting, softening and deformation under the influence of the high temperature of the core package of the energy storage battery, the first heat-resistant part will not be affected by the high temperature and will not undergo a large deformation, thereby enabling the first heat-resistant part to support the lower insulating part or the core package, so that the core package and the sealing cover always maintain a certain gap, and will not block the exhaust structure of the sealing cover, thereby enabling the exhaust structure of the sealing cover to remain connected to the interior of the energy storage battery, so that the high-pressure gas in the energy storage battery can continue to be discharged through the exhaust structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a schematic diagram of the exploded structure of an embodiment of a cover plate assembly provided in an embodiment of the present application;

[0038] Figure 2 is a cross-sectional view of an embodiment of a cover plate assembly provided in an embodiment of the present application, wherein the cross-sectional plane is perpendicular to the width direction of the cover;

[0039] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0040] Figure 4 It is a structural schematic diagram of an embodiment of a sealing cover, a first temperature-resistant component and a second temperature-resistant component provided in an embodiment of the present application;

[0041] Figure 5 is a bottom view of an embodiment of a cover plate assembly provided in an embodiment of the present application;

[0042] Figure 6 is a schematic structural diagram of an embodiment of a first temperature-resistant component provided in an embodiment of the present application;

[0043] Figure 7 is a structural schematic diagram of another embodiment of the first temperature-resistant component provided in an embodiment of the present application;

[0044] Figure 8 is a cross-sectional view of another embodiment of the cover plate assembly provided in an embodiment of the present application, wherein the cross-sectional plane is perpendicular to the width direction of the cover;

[0045] Fig. 9 yes Figure 8 The enlarged view of point B in the middle;

[0046] Fig.10 It is a structural schematic diagram of an embodiment of the lower insulating member, the first temperature-resistant member and the second temperature-resistant member provided in an embodiment of the present application.

[0047] Cover plate assembly 100; cover 110; exhaust structure 1101; lower insulating member 120; sub-plastic 121; through hole 1200; first protrusion 1201; sub-protrusion 1202; first accommodating cavity 1203; sub-cavity 1204; abutting protrusion 1205; first protruding portion 1206; second protruding portion 1207; second protrusion 1208; second accommodating cavity 1209; first through hole 1210; second through hole 1211; first temperature-resistant member 130; sub-temperature-resistant member 131; supporting portion 1301; through hole 1302; connecting portion 1303; first connecting section 1304; second connecting section 1305; explosion-proof valve 140; second temperature-resistant member 150; length direction X; width direction Y; thickness direction Z. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0049] The embodiments of the present application provide a cover plate assembly and an energy storage battery.

[0050] Figure 1 Schematic diagram of the exploded structure of an embodiment of the cover assembly provided in the present application. Figure 1As shown, the cap plate assembly 100 includes a cover 110 and a lower insulating member 120, and the lower insulating member 120 is arranged opposite to the cover 110. When the cap plate assembly 100 is used for an energy storage battery, the lower insulating member 120 of the cap plate assembly 100 is located on the side of the cover 110 facing the core pack of the energy storage battery, so that the cover 110 and the core pack are insulated and isolated by the lower insulating member 120.

[0051] like Figures 1 to 3 As shown, the cover 110 is provided with an exhaust structure 1101. When the pressure inside the energy storage battery is too high, it can be discharged through the exhaust structure 1101 of the cover 110. Among them, an exhaust hole can be opened in the cover 110 to form the exhaust structure 1101. The cover assembly 100 can also include an explosion-proof valve 140 provided at the exhaust hole. When the pressure inside the energy storage battery increases to a certain value, the explosion-proof valve 140 opens, so that the high-pressure gas inside the energy storage battery is quickly discharged through the exhaust hole.

[0052] Of course, an explosion-proof valve 140 of an integrated structure may also be directly provided on the cover 110 to form the exhaust structure 1101. Specifically, a notch may be provided on the cover 110 to form the explosion-proof valve 140, and when the pressure inside the energy storage battery is too high, the notch is disconnected under the action of the air pressure to form an exhaust hole of the exhaust structure 1101.

[0053] In some embodiments, the cover plate assembly 100 may also include a first temperature resistant component 130, which is installed between the cover 110 and the lower insulating component 120 so that there is a gap between the cover 110 and the lower insulating component 120 at the exhaust structure 1101 of the cover 110, and the first temperature resistant component 130 is fixedly connected to the cover 110 or the lower insulating component 120.

[0054] The cover plate assembly 100 provided in the embodiment of the present application is provided with a first temperature-resistant member 130 between the lower insulating member 120 and the cover 110, so that there is a gap between the cover 110 and the lower insulating member 120 at the exhaust structure 1101 of the cover 110, and the first temperature-resistant member 130 is fixedly connected to the cover 110 or the lower insulating member 120, so that the position of the first temperature-resistant member 130 can be kept stable, and due to the high temperature resistance of the first temperature-resistant member 130, when the lower insulating member 120 of the cover plate assembly 100 is affected by the high temperature of the core pack of the energy storage battery, the lower insulating member 120 of the cover plate assembly 100 is not heated. After a certain degree of melting, softening and deformation, the first temperature-resistant component 130 will not be greatly deformed under the influence of high temperature, so that the first temperature-resistant component 130 can support the lower insulating component 120 or the core package, so that the core package and the cover 110 always maintain a certain distance, and the core package will not move toward the cover 110 to block the exhaust structure 1101 of the cover 110, so that the exhaust structure 1101 of the cover 110 remains connected with the interior of the energy storage battery, so that the high-pressure gas in the energy storage battery can continue to be discharged through the exhaust structure 1101.

[0055] In some embodiments, the first temperature resistant component 130 can be welded to the cover 110, or the first temperature resistant component 130 can be injection molded to the lower insulating component 120, so that the position of the first temperature resistant component 130 relative to the exhaust structure 1101 remains stable, which is beneficial to maintaining a stable spacing between the cover 110 and the lower insulating component 120 at the exhaust structure 1101 of the cover 110.

[0056] like Figures 2 to 5 As shown, the first temperature-resistant member 130 may include a support portion 1301 and at least one connection portion 1303, wherein the support portion 1301 is used to abut against the lower insulating member 120, and the connection portion 1303 is used to connect with the cover 110, thereby connecting the first temperature-resistant member 130 to the cover 110. The connection portion 1303 may be used to be welded to the cover 110, thereby connecting the first temperature-resistant member 130 to the cover 110.

[0057] In some embodiments, at least one connection portion 1303 may be protruded from the support portion 1301 to facilitate welding connection between the at least one connection portion 1303 and the cover 110 .

[0058] Among them, a connecting portion 1303 can be protruded from the side of the support portion 1301 facing the cover 110, so that when the connecting portion 1303 is welded to the cover 110, a certain distance can be maintained between the support portion 1301 and the cover 110, so as to facilitate the exhaust structure 1101 of the cover 110 to maintain communication with the inside of the energy storage battery.

[0059] Alternatively, the support portion 1301 may be provided with a protruding connection portion 1303 on at least one side along the length direction X or the width direction Y of the cover 110, and the length direction X, width direction Y and thickness direction Z of the cover 110 are perpendicular to each other, so that the connection portion 1303 of the first temperature resistant component 130 can avoid the exhaust structure 1101 of the cover 110, making the welding connection between the first temperature resistant component 130 and the cover 110 more convenient.

[0060] It should be noted that the connection portion 1303 can be made to protrude from both the side of the support portion 1301 facing the cover 110 and the side of the support portion 1301 along the length direction X or the width direction Y of the cover 110, or the connection portion 1303 can be made to protrude only from the side of the support portion 1301 facing the cover 110, or the connection portion 1303 can be made to protrude only from the side of the support portion 1301 along the length direction X or the width direction Y of the cover 110.

[0061] In some embodiments, the number of the connecting parts 1303 of the first temperature-resistant member 130 can be multiple, and the multiple connecting parts 1303 are respectively connected to the cover 110. In this way, the connection strength between the first temperature-resistant member 130 and the cover 110 can be further improved. Among them, the multiple connecting parts 1303 can be respectively connected to the cover 110 by welding, or the multiple connecting parts 1303 can be connected to the cover 110 by other means. Of course, the former can make the connection stability between the first temperature-resistant member 130 and the cover 110 better.

[0062] In some embodiments, multiple connecting parts 1303 can be distributed on both side edges of the support part 1301 along the length direction X, and multiple connecting parts 1303 located on the same side edge of the support part 1301 can be spaced apart along the width direction Y, so that the connection stability between the first temperature resistant part 130 and the cover 110 is higher.

[0063] Specifically, the support portion 1301 of the first temperature-resistant member 130 is plate-shaped, and one side of the plate surface of the first temperature-resistant member 130 is spaced apart from the cover 110. The support portion 1301 is provided with a through hole 1302, and the through hole 1302 penetrates the support portion 1301 along the thickness direction Z of the cover 110. Two connecting portions 1303 are respectively provided on the two side edges of the support portion 1301 along the length direction X of the cover 110, and the two connecting portions 1303 located on the same side edge of the support portion 1301 are spaced apart along the width direction Y of the cover 110. The connecting portion 1303 includes a first connecting segment 1304 and a second connecting segment 1305 connected in sequence, and the first connecting segment 1304 and the second connecting segment 1305 are arranged at an angle. One end of the first connection section 1304 is connected to the support portion 1301, and the first connection section 1304 extends from the support portion 1301 toward the cover 110, one end of the second connection section 1305 extends from one end of the first connection section 1304 close to the cover 110, and the second connection section 1305 and the support portion 1301 are distributed on both sides of the first connection section 1304 along the length direction X of the cover 110. The second connection section 1305 is welded to the side of the cover 110 facing the lower insulating member 120.

[0064] Alternatively, multiple connecting parts 1303 can be distributed on both side edges of the support part 1301 along the width direction Y, and multiple connecting parts 1303 located on the same side edge of the support part 1301 are spaced apart along the length direction X, so that the connection stability between the first temperature-resistant part 130 and the cover 110 is higher.

[0065] In some embodiments, multiple connection parts 1303 may be distributed on both sides of the exhaust structure 1101 along the length direction X. Thus, the shielding of the exhaust structure 1101 by the connection parts 1303 can be reduced, so that the gas inside the energy storage battery can be discharged through the exhaust structure 1101 more quickly.

[0066] Of course, multiple connection parts 1303 may also be distributed on both sides of the exhaust structure 1101 along the width direction Y, thereby reducing the shielding of the exhaust structure 1101 by the connection parts 1303, so that the gas inside the energy storage battery can be discharged through the exhaust structure 1101 faster.

[0067] In some embodiments, the lower insulating member 120 may include a first protrusion 1201 corresponding to the exhaust structure 1101, and the first protrusion 1201 may be provided with a through hole 1200 communicating with the exhaust structure 1101, so that when the pressure inside the energy storage battery is too high, it can be discharged through the through hole 1200 and the exhaust structure 1101. The first protrusion 1201 may be used to abut against the core package to limit the core package from moving toward the cover 110, so that a certain distance is maintained between the core package and the cover 110.

[0068] The first temperature-resistant member 130 may be installed between the cover 110 and the first protrusion 1201 to further reduce the risk of the lower insulating member 120 or the core package blocking the exhaust structure 1101 after the lower insulating member 120 melts and deforms at high temperature.

[0069] In some embodiments, a first accommodating cavity 1203 may be formed between the first protrusion 1201 and the cover 110, and the through hole 1200 and the exhaust structure 1101 are respectively connected to the first accommodating cavity 1203. At least a portion of the first temperature-resistant member 130 is disposed in the first accommodating cavity 1203. Thus, the through hole 1200 is connected to the exhaust structure 1101 of the cover 110 through the first accommodating cavity 1203, and the first temperature-resistant member 130 can be positioned through the first accommodating cavity 1203, so that the position of the first temperature-resistant member 130 is more stable and the installation is more convenient.

[0070] In some embodiments, Figure 3 As shown, a contact protrusion 1205 may be provided on the side of the first protrusion 1201 of the lower insulating member 120 facing the cover 110, and the contact protrusion 1205 is located in the first accommodating cavity 1203, and the contact protrusion 1205 contacts the side of the first temperature-resistant member 130 facing away from the cover 110, so that the first temperature-resistant member 130 is spaced apart from the through hole 1200. Thus, the contact protrusion 1205 can keep a certain distance between the first temperature-resistant member 130 and the through hole 1200 of the first protrusion 1201, thereby reducing the shielding of the first temperature-resistant member 130 on the through hole 1200 of the first protrusion 1201, so that the gas inside the energy storage battery can be discharged faster through the through hole 1200 and the exhaust structure 1101.

[0071] The abutting protrusion 1205 may include a first protrusion 1206 and a second protrusion 1207, the first protrusion 1206 and the second protrusion 1207 respectively abut against the side of the first temperature-resistant member 130 away from the cover 110, the extension directions of the first protrusion 1206 and the second protrusion 1207 are arranged at an angle, and the extension directions of the first protrusion 1206 and the second protrusion 1207 are arranged at an angle with the thickness direction Z of the cover 110. In this way, the contact area between the abutting protrusion 1205 and the first temperature-resistant member 130 can be increased, and the abutment between the abutting protrusion 1205 and the first temperature-resistant member 130 can be more stable.

[0072] Specifically, the first protrusion 1206 extends along the length direction X of the cover 110, and the second protrusion 1207 extends along the width direction Y of the cover 110, and the length direction X, the width direction Y and the thickness direction Z of the cover 110 are perpendicular to each other. There are multiple first protrusions 1206, and the multiple first protrusions 1206 are arranged at intervals along the width direction Y of the cover 110. The first protrusion 1206 and the second protrusion 1207 are convexly arranged on the bottom surface of the first accommodating cavity 1203 opposite to the cover 110. One end of the multiple first protrusions 1206 is respectively connected to the first protrusion 1206, and the other end of the multiple first protrusions 1206 is connected to the inner side surface of the first accommodating cavity 1203. A through hole 1200 is formed between two adjacent first protrusions 1206.

[0073] like Figure 1 and Figure 3 As shown, the first temperature-resistant member 130 includes a support portion 1301 and a plurality of connection portions 1303. The support portion 1301 is used to abut against the abutting protrusion 1205 so that the first temperature-resistant member 130 is spaced apart from the through hole 1200. A through hole 1302 is provided in the support portion 1301, and the through hole 1302 penetrates the support portion 1301 along the thickness direction Z of the cover 110.

[0074] Among them, the through hole 1200 can include a first through hole 1210 opened on the bottom surface of the first accommodating cavity 1203, and the first through hole 1210 is arranged opposite to the through hole 1302, so that the first through hole 1210 is connected with the through hole 1302. When the pressure inside the energy storage battery is too high, the high-pressure gas can quickly pass through the first through hole 1210 and the through hole 1302 and be discharged from the exhaust structure 1101.

[0075] In addition, if Figure 1 , Figure 3 to Figure 4As shown, the multiple connection parts 1303 of the first temperature-resistant member 130 are arranged at intervals and are used to connect with the cover 110. Among them, the through hole 1200 can also include a second through hole 1211 opened on the side of the first accommodating cavity 1203, and the second through hole 1211 is arranged relative to the interval between two adjacent connection parts 1303 of the first temperature-resistant member 130, so that the second through hole 1211 is connected to the exhaust structure 1101 through the interval between the two adjacent connection parts 1303. When the pressure inside the energy storage battery is too high, the high-pressure gas can quickly pass through the second through hole 1211 and the interval between the two adjacent connection parts 1303, and then be discharged from the exhaust structure 1101.

[0076] By making the through hole 1200 include the first through hole 1210 and the second through hole 1211, multi-channel pressure relief of the first temperature-resistant component 130 can be achieved, so that the flow area of ​​the through hole 1200 is larger, which is conducive to improving the pressure relief efficiency and reliability.

[0077] In some embodiments, the number of first through holes 1210 can be multiple to further improve the pressure relief efficiency and stability of the through hole 1200. Specifically, the multiple first through holes 1210 are divided into two rows arranged along the length direction X of the cover 110, and the arrangement direction of the multiple first through holes 1210 in each row is consistent with the width direction Y of the cover 110.

[0078] In some embodiments, the number of the second through holes 1211 can be multiple to further improve the pressure relief efficiency and stability of the through hole 1200. Specifically, the second through holes 1211 are respectively provided on the two sides of the first accommodating cavity 1203 along the length direction X of the cover 110. The number of the second through holes 1211 provided on the same side is multiple. The multiple second through holes 1211 provided on the same side are arranged along the width direction Y of the cover 110.

[0079] In some embodiments, Figure 2 and Figure 3 As shown, the lower insulating member 120 includes two sub-plastics 121 separately arranged along the length direction X of the cover 110, and the first protrusion 1201 of the lower insulating member 120 includes sub-protrusions 1202 distributed on the two sub-plastics 121, and a first accommodating cavity 1203 is formed between the two sub-protrusions 1202 and the cover 110. By dividing the lower insulating member 120 into two sub-plastics 121, the processing of the lower insulating member 120 can be made more convenient.

[0080] The two sub-protrusions 1202 may be each provided with an abutting protrusion 1205 , and the two sub-protrusions 1202 abut against a side of the first temperature-resistant component 130 facing away from the sealing cover 110 via the abutting protrusions 1205 .

[0081] In some embodiments, Figure 6As shown, the first temperature-resistant member 130 may include at least two sub-temperature-resistant members 131 spaced apart from each other, and the at least two sub-temperature-resistant members 131 are respectively installed between the cover 110 and the lower insulating member 120, so that there is a gap between the cover 110 and the lower insulating member 120 at the exhaust structure 1201. In this way, the first temperature-resistant member 130 can be flexibly assembled according to the structure of the lower insulating member 120. For example Figures 8 to 10 As shown: when the plastic includes two sub-plastics 121 separately arranged along the length direction X of the cover 110, each sub-plastic 121 can be arranged corresponding to at least one sub-heat-resistant component 131, so that the sub-heat-resistant component 131 separates the sub-plastic 121 from the cover 110.

[0082] In some embodiments, the sub-heat-resistant component 131 can include a supporting portion 1301 and at least one connecting portion 1303, wherein the supporting portion 1301 is used to abut against the lower insulating component 120, and the connecting portion 1303 is used to be welded to the cover 110. At least one connecting portion 1303 of the sub-heat-resistant component 131 is protruded from the supporting portion 1301, thereby making the welding connection between the sub-heat-resistant component 131 and the cover 110 more convenient.

[0083] Continue to refer to Figure 6 , of two adjacent sub-heat-resistant components 131, the connection portion 1303 of one of the sub-heat-resistant components 131 can be located at an end of the support portion 1301 away from the other sub-heat-resistant component 131. Thus, when the two adjacent sub-heat-resistant components 131 are connected to the cover 110, the shielding of the exhaust structure 1101 of the cover 110 by the connection portion 1303 of the sub-heat-resistant component 131 can be reduced.

[0084] In the present application embodiment, Figure 6 As shown, at least two sub-temperature-resistant parts 131 can be distributed along the length direction X of the cover 110, or, as shown in FIG. Figure 7 As shown, at least two sub-temperature-resistant parts 131 may also be distributed along the width direction Y of the cover 110 , which may be determined specifically according to the structure of the lower insulating part 120 .

[0085] Specifically, the first accommodating cavity 1203 includes sub-cavities 1204 located at the two sub-protrusions 1202 , and each sub-cavity 1204 is provided with a sub-temperature-resistant member 131 . The sub-temperature-resistant member 131 extends along the width direction Y of the cover 110 .

[0086] In the embodiment of the present application, the lower insulating member 120 and the first temperature-resistant member 130 can also be injection molded together by injection molding, so that the lower insulating member 120 and the first temperature-resistant member 130 are fixedly connected. The lower insulating member 120 can be plastic or other insulating materials, which are not limited here. Specifically, the lower insulating member 120 can be lower plastic. In addition, the material of the cover 110 can be metal. Specifically, the cover 110 can be a bare aluminum sheet.

[0087] In some embodiments, Figure 8 and Fig.10 As shown, the cover plate assembly 100 further includes at least one second temperature resistant component 150 , which is disposed on a side of the cover 110 facing the lower insulating component 120 and is located at an end of the length direction X of the cover 110 .

[0088] Therefore, when the lower insulating member 120 undergoes a certain degree of melting, softening and deformation under the influence of the high temperature of the core package of the energy storage battery, the second temperature-resistant member 150 will not undergo a large deformation, so that the second temperature-resistant member 150 can support the lower insulating member 120 or the core package, so that the core package and the cover 110 always maintain a certain distance.

[0089] Among them, the lower insulating member 120 can include at least one second protrusion 1208, and the second protrusion 1208 has a second accommodating cavity 1209 formed on the side facing the cover 110. The second temperature-resistant member 150 is arranged in the second accommodating cavity 1209, so that the position of the second temperature-resistant member 150 is more stable, which is beneficial to improving the supporting stability of the second temperature-resistant member 150 to the lower insulating member 120 or the core package.

[0090] The cover plate assembly 100 may include two second temperature-resistant parts 150, which are located at both ends of the cover 110 in the length direction X. Correspondingly, the lower insulating part 120 includes two second protrusions 1208, and the two second protrusions 1208 are respectively formed with second accommodating cavities 1209 on one side facing the cover 110, and the two second temperature-resistant parts 150 are installed in the two second accommodating cavities 1209 in a one-to-one correspondence. In this way, the limiting effect of the second temperature-resistant parts 150 on the core package can be further improved.

[0091] In some embodiments, the second temperature-resistant component 150 can be welded to the cover 110, or the second temperature-resistant component 150 can be injection-molded to the lower insulating component 120, so that the position of the second temperature-resistant component 150 remains stable, which is beneficial for maintaining a certain distance between the cover 110 and the core package.

[0092] In the embodiment of the present application, the melting temperature of the first temperature-resistant member 130 and the second temperature-resistant member 150 can be made greater than the melting temperature of the lower insulating member 120, so that when the lower insulating member 120 is deformed or even melted under high temperature, the melting or deformation of the first temperature-resistant member 130 and the second temperature-resistant member 150 is less, and the lower insulating member 120 or the core package can be supported. Among them, the melting temperature of the first temperature-resistant member 130 and the second temperature-resistant member 150 can be made greater than the thermal runaway temperature of the battery cell, so that when the battery cell is in thermal runaway, the first temperature-resistant member 130 and the second temperature-resistant member 150 will not be greatly deformed, and still have a good supporting effect on the lower insulating member 120 or the core package.

[0093] In some embodiments, the material of the first temperature-resistant component 130 and the second temperature-resistant component 150 may include metal, ceramic or other materials that can withstand high temperatures, which is not limited here.

[0094] The embodiment of the present application also provides an energy storage battery, which includes a cover plate assembly. The specific structure of the cover plate assembly refers to the above embodiment. Since the energy storage battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0095] The energy storage battery provided by the embodiment of the present application is provided with a first temperature-resistant member 130 between the lower insulating member 120 of the cover plate assembly 100 and the cover 110, so that there is a gap between the cover 110 and the lower insulating member 120 at the exhaust structure 1101 of the cover 110, and the first temperature-resistant member 130 is fixedly connected to the cover 110 or the lower insulating member 120, so that the position of the first temperature-resistant member 130 can be kept stable, and due to the high temperature resistance of the first temperature-resistant member 130, when the lower insulating member 120 of the cover plate assembly 100 is affected by the high temperature of the core pack of the energy storage battery After a certain degree of melting, softening and deformation occurs, the first temperature-resistant component 130 will not undergo a large deformation under the influence of high temperature, so that the first temperature-resistant component 130 can support the lower insulating component 120 or the core package, so that the core package and the cover 110 always maintain a certain distance, and the core package will not move toward the cover 110 to block the exhaust structure 1101 of the cover 110, so that the exhaust structure 1101 of the cover 110 remains connected with the interior of the energy storage battery, so that the high-pressure gas in the energy storage battery can continue to be discharged through the exhaust structure 1101.

[0096] The energy storage battery may include a shell and a core package, wherein the core package is disposed in the shell, and the shell includes a cover plate assembly 100, wherein a lower insulating member 120 of the cover plate assembly 100 is located on a side of the cover 110 facing the core package.

[0097] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A cover plate assembly, characterized in that: include: The cover is provided with an exhaust structure; A lower insulating member, arranged opposite to the sealing cover; The first temperature-resistant component is installed between the sealing cover and the lower insulating component so that there is a gap between the sealing cover and the lower insulating component at the exhaust structure, and the first temperature-resistant component is fixedly connected to the sealing cover or the lower insulating component.

2. The cover plate assembly according to claim 1, characterized in that: The first temperature-resistant component is connected to the sealing cover by welding, or the first temperature-resistant component is connected to the lower insulating component by injection molding.

3. The cover plate assembly according to claim 2, characterized in that: The first temperature-resistant part includes a supporting portion and at least one connecting portion, wherein the supporting portion is used to abut against the lower insulating member, the at least one connecting portion is protruding from the supporting portion, and the connecting portion is used to be welded to the cover.

4. The cover plate assembly according to claim 3, characterized in that: The connecting portion is protrudingly provided on one side of the supporting portion facing the sealing cover; and / or, The connecting portion is protrudingly provided on at least one side of the support portion along the length direction or the width direction of the cover, and the length direction, the width direction and the thickness direction of the cover are perpendicular to each other.

5. The cover plate assembly according to claim 4, characterized in that: There are multiple connecting parts, and the multiple connecting parts are respectively connected to the cover by welding.

6. The cover plate assembly according to claim 5, characterized in that: The plurality of connecting portions are distributed on both side edges of the supporting portion along the length direction, and the plurality of connecting portions located on the same side edge of the supporting portion are spaced apart along the width direction; or, The plurality of connecting portions are distributed on both side edges of the supporting portion along the width direction, and the plurality of connecting portions located on the same side edge of the supporting portion are spaced apart along the length direction.

7. The cover plate assembly according to claim 5, characterized in that: The plurality of connecting portions are distributed on both sides of the exhaust structure along the length direction; and / or the plurality of connecting portions are distributed on both sides of the exhaust structure along the width direction.

8. The cover plate assembly according to any one of claims 1 to 7, characterized in that: The lower insulating member includes a first protrusion corresponding to the exhaust structure, the first protrusion is provided with a through hole communicating with the exhaust structure, and the first temperature-resistant member is installed between the cover and the first protrusion.

9. The cover plate assembly according to claim 8, characterized in that: A first accommodating cavity is formed between the first protrusion and the cover, the through hole and the exhaust structure are respectively communicated with the first accommodating cavity, and at least a portion of the first temperature-resistant component is located in the first accommodating cavity.

10. The cover plate assembly according to claim 9, characterized in that: A contact protrusion is provided on one side of the first protrusion facing the cover. The contact protrusion is located in the first accommodating cavity and contacts the side of the first temperature-resistant component away from the cover so that the first temperature-resistant component is spaced apart from the through hole.

11. The cover plate assembly according to claim 10, characterized in that: The first temperature-resistant member comprises a supporting portion and a plurality of connecting portions, wherein the supporting portion is used to abut against the abutting protrusion, the supporting portion is provided with a through hole, and the through hole penetrates the supporting portion along the thickness direction of the cover; the plurality of connecting portions are arranged at intervals and are used to connect with the cover; Among them, the through hole includes a first through hole opened on the bottom surface of the first accommodating cavity, and the first through hole is arranged opposite to the via hole; the through hole also includes a second through hole opened on the side surface of the first accommodating cavity, and the second through hole is arranged opposite to the interval between two adjacent connecting parts.

12. The cover plate assembly according to claim 10, wherein: The abutment protrusion includes a first protrusion portion and a second protrusion portion, the first protrusion portion and the second protrusion portion respectively abut against a side of the first temperature-resistant part away from the cover, the extension directions of the first protrusion portion and the second protrusion portion are set at an angle, and the extension directions of the first protrusion portion and the second protrusion portion are respectively set at an angle with the thickness direction of the cover.

13. The cover plate assembly according to claim 9, wherein: The lower insulating member includes two sub-plastics separately arranged along the length direction of the cover, the first protrusion includes sub-protrusions distributed on the two sub-plastics, and the first accommodating cavity is formed between the two sub-protrusions and the cover.

14. The cover plate assembly according to claim 13, wherein: The first temperature-resistant member includes at least two sub-temperature-resistant members that are spaced apart from each other. The at least two sub-temperature-resistant members are respectively installed between the cover and the lower insulating member, so that there is a space between the cover and the lower insulating member at the exhaust structure.

15. The cover plate assembly according to claim 14, wherein: Each of the sub-protrusions is arranged corresponding to at least one of the sub-temperature-resistant components.

16. The cover plate assembly according to any one of claims 1 to 7, characterized in that: The cover plate assembly further comprises at least one second temperature resistant component, which is arranged on a side of the cover facing the lower insulating component and is located at an end of the cover in a length direction.

17. The cover plate assembly according to claim 16, wherein: The lower insulating member includes at least one second protrusion, a second accommodating cavity is formed on a side of the second protrusion facing the cover, and the second temperature-resistant member is arranged in the second accommodating cavity.

18. The cover plate assembly according to claim 17, wherein: The cover plate assembly includes two second temperature-resistant parts, which are located at both ends of the length direction of the cover; the lower insulating part includes two second protrusions, and the two second protrusions are respectively formed with the second accommodating cavities on one side facing the cover, and the two second temperature-resistant parts are arranged in the two second accommodating cavities in a one-to-one correspondence.

19. The cover plate assembly according to claim 16, wherein: The material of the second temperature-resistant component includes metal or ceramic; the second temperature-resistant component is connected to the cover by welding, or the second temperature-resistant component is connected to the lower insulating component by injection molding.

20. The cover plate assembly according to any one of claims 1 to 7, characterized in that: The material of the first temperature-resistant component includes metal or ceramic.

21. An energy storage battery, characterized in that: A cover plate assembly comprising any one of claims 1 to 19.

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