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, a lower insulating part and a temperature-resistant part, and the sealing cover is provided with an exhaust structure; the lower insulating part and the sealing cover are oppositely arranged, and a through hole is formed in the lower insulating part; and the temperature-resistant part is positioned on one side, facing the lower insulating part, of the sealing cover, and is used for penetrating through the through hole to abut against the core bag positioned on one side, deviating from the sealing cover, of the lower insulating part, so that a gap exists between the sealing cover and the core bag at the exhaust structure. When the lower insulating part of the cover plate assembly is melted, softened and deformed to a certain degree under the influence of the high temperature of the core bag, the temperature-resistant part cannot be greatly deformed under the influence of the high temperature, so that the temperature-resistant part can stably support the core bag, the core bag and the sealing cover are always kept at a certain interval at the exhaust structure of the sealing cover, and the sealing cover is prevented from being damaged. And when the explosion-proof valve is opened, the exhaust structure of the sealing cover can keep a communication state with the interior of the energy storage battery, so that high-pressure gas in the energy storage battery can be continuously exhausted through the exhaust structure.

Description

Technical Field

[0001] This application relates to the field of energy storage battery technology, specifically to a cover plate assembly and an energy storage battery. Background Technology

[0002] In related technologies, the cover of the energy storage battery is insulated from the core pack by the lower insulating component. When the heat generated during the operation of the core pack is large, the lower insulating component of the cover assembly may melt, soften and deform to a certain extent, which may cause the core pack to move toward the cover and block the venting structure of the cover. This may prevent the explosion-proof valve installed in the venting structure from releasing pressure in time, thereby causing the energy storage battery to explode. Utility Model Content

[0003] The embodiments of this 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 venting structure of the cover.

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

[0005] The cover is sealed and has an exhaust structure.

[0006] A lower insulating component is disposed opposite to the cover, and the lower insulating component has a through hole;

[0007] A heat-resistant element is located on the side of the cover facing the lower insulator. The heat-resistant element is used to pass through the through hole and abut against the core package located on the side of the lower insulator opposite to the cover, so that there is a gap between the cover and the core package at the exhaust structure.

[0008] In some embodiments, the heat-resistant member includes a support portion and two connecting portions, the two connecting portions respectively abutting against the side of the cover facing the lower insulator, such that there is a gap between the support portion and the cover at the venting structure.

[0009] In some embodiments, the cover plate assembly further includes an explosion-proof valve disposed in the exhaust structure, and the heat-resistant component includes an exhaust channel communicating with the exhaust structure, wherein the flow area of ​​the exhaust channel is greater than or equal to the flow area of ​​the explosion-proof valve after it is opened.

[0010] In some embodiments, the exhaust passage includes a first passage that extends through the support portion along the thickness direction of the cover.

[0011] In some embodiments, the two connecting portions protrude from the side of the support portion facing the cover, and the two connecting portions are arranged along the width direction of the cover;

[0012] The exhaust channel also includes a second channel, which is located between the two connecting parts and extends through the heat-resistant component along the length of the cover. The length, width, and thickness directions of the cover are perpendicular to each other.

[0013] In some embodiments, the lower insulating member includes a protrusion corresponding to the exhaust structure, the protrusion having the through hole, a receiving cavity being formed between the protrusion and the cover, the through hole and the exhaust structure communicating with the receiving cavity, and at least a portion of the heat-resistant member being located within the receiving cavity.

[0014] In some embodiments, the protrusion abuts against the side of the heat-resistant member away from the cover to restrict the movement of the heat-resistant member toward the side away from the cover.

[0015] In some embodiments, the protrusion includes two limiting surfaces located within the through hole, the two limiting surfaces being disposed opposite to each other; the distance between the two limiting surfaces gradually decreases in the direction away from the cover;

[0016] The heat-resistant component includes two first abutting surfaces, which abut against the two limiting surfaces one by one.

[0017] In some embodiments, the heat-resistant component includes a support portion and two connecting portions, the two connecting portions respectively abutting against the side of the cover facing the lower insulating component, so that the support portion and the cover are spaced apart at the venting structure; the two first abutting surfaces are located on both sides of the support portion.

[0018] In some embodiments, at least one of the limiting surfaces is provided with at least one first pressure relief hole penetrating the protrusion; the gap between the support and the cover communicates with at least one of the first pressure relief holes.

[0019] In some embodiments, the protrusion has a second abutment surface on the side opposite to the cap for abutting the core package, and the protrusion further includes a transition surface extending from the second abutment surface to the limiting surface, the transition surface extending along the thickness direction of the cap.

[0020] In some embodiments, the two limiting surfaces are distributed on both sides of the through hole along the length direction of the cover.

[0021] In some embodiments, the surface of the heat-resistant element facing away from the cap is flush with the surface of the protrusion facing away from the cap.

[0022] In some embodiments, a recessed groove is formed on the surface of the lower insulating member near the cap, the groove being provided corresponding to the venting structure, and a second pressure relief hole is provided on the bottom surface of the groove, the second pressure relief hole penetrating the lower insulating member.

[0023] In some embodiments, the width of the heat-resistant element along the width direction of the cover is L, where L≥(a-1)*H; where a is the number of core packages and is greater than or equal to 2; and H is the thickness of the core package in the width direction of the cover.

[0024] In some embodiments, the heat-resistant component is made of metal or ceramic.

[0025] Secondly, embodiments of this application provide an energy storage battery, including the cover assembly described above, the cover assembly comprising:

[0026] The cover is sealed and has an exhaust structure.

[0027] A lower insulating component is disposed opposite to the cover, and the lower insulating component has a through hole;

[0028] A heat-resistant element is located on the side of the cover facing the lower insulator. The heat-resistant element is used to pass through the through hole and abut against the core package located on the side of the lower insulator opposite to the cover, so that there is a gap between the cover and the core package at the exhaust structure.

[0029] The beneficial effects of the embodiments of this application are as follows:

[0030] In the embodiments of this application, a heat-resistant component is provided on the side of the cover assembly facing the lower insulator. The heat-resistant component passes through the through hole of the lower insulator and abuts against the core package located on the side of the lower insulator away from the cover. This creates a gap between the core package and the cover at the venting structure of the cover. Due to the high-temperature resistance of the heat-resistant component, when the lower insulator of the cover 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 heat-resistant component will not undergo significant deformation under the influence of the high temperature. This allows the heat-resistant component to stably support the core package, ensuring that the core package and the cover always maintain a certain gap at the venting structure of the cover. The core package will not move towards the cover and block the venting structure of the cover. When the explosion-proof valve is opened, the venting structure of the cover can maintain communication with the interior of the energy storage battery, allowing the high-pressure gas inside the energy storage battery to continue to be discharged through the venting structure. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is an exploded structural diagram of one embodiment of the cover plate assembly provided in this application;

[0033] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0034] Figure 3 This is a cross-sectional view of one embodiment of the cover assembly provided in this application, wherein the cutting plane is perpendicular to the width direction of the cover;

[0035] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0036] Figure 5 This is a schematic diagram of one embodiment of the heat-resistant component provided in this application.

[0037] Cover assembly 100; Cover 110; Exhaust structure 1101; Lower insulating component 120; Through hole 1200; Protrusion 1201; Sub-protrusion 1202; Receiving cavity 1203; First pressure relief hole 1204; Second abutment surface 1206; Transition surface 1207; Limiting surface 1210; Sub-plastic 121; Settlement 122; Second pressure relief hole 1221; Temperature resistant component 130; Exhaust channel 1300; Support part 1301; First channel 1302; Connecting part 1303; Fitting part 1304; Second channel 1306; First abutment surface 1307; Explosion-proof valve 140; Length direction X; Width direction Y; Thickness direction Z; Width L. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0039] In related technologies, the cover of the energy storage battery is insulated from the core pack by the lower insulating component. When the heat generated during the operation of the core pack is large, the lower insulating component of the cover assembly may melt, soften and deform to a certain extent, which may cause the core pack to move toward the cover and block the venting structure of the cover. This may prevent the explosion-proof valve installed in the venting structure from releasing pressure in time, thereby causing the energy storage battery to explode.

[0040] To address the aforementioned issues, embodiments of this application provide a cover plate assembly and an energy storage battery.

[0041] Figure 1 This is an exploded structural diagram of one embodiment of the cover plate assembly provided in this application. Figure 2 yes Figure 1 A magnified view of point A in the middle. (See image below.) Figure 1 and Figure 2 As shown, the cover assembly 100 includes a cover 110 and a lower insulator 120, which is disposed opposite to the cover 110. When the cover assembly 100 is used in an energy storage battery, the lower insulator 120 of the cover assembly 100 is located on the side of the cover 110 facing the cell pack of the energy storage battery, thereby insulating and isolating the cover 110 and the cell pack through the lower insulator 120.

[0042] like Figures 1 to 3 As shown, the cover 110 is provided with a venting structure 1101, which allows excessive pressure inside the energy storage battery to be released through the venting structure 1101. The venting structure 1101 can be formed by creating a venting hole in the cover 110. The cover assembly 100 may also include an explosion-proof valve 140 located at the venting 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 be quickly released through the venting hole.

[0043] Alternatively, an integrated explosion-proof valve 140 can be directly installed on the cover 110 to form an exhaust structure 1101. Specifically, grooves can be provided on the cover 110 to form the explosion-proof valve 140. When the pressure inside the energy storage battery is too high, the grooves will break under the action of air pressure to form an exhaust port of the exhaust structure 1101.

[0044] In some embodiments, the lower insulating member 120 has a through hole 1200, and the cover plate assembly 100 may further include a heat-resistant member 130, which is located on the side of the cover 110 facing the lower insulating member 120. The heat-resistant member 130 is used to pass through the through hole 1200 of the lower insulating member 120 and abut against the core package located on the side of the lower insulating member 120 away from the cover 110, so that there is a gap between the core package and the cover 110 at the venting structure 1101 of the cover 110.

[0045] The cover assembly 100 provided in this application embodiment has a heat-resistant element 130 provided on the side of the cover 110 facing the lower insulator 120. The heat-resistant element 130 passes through the through hole 1200 of the lower insulator 120 and abuts against the core package located on the side of the lower insulator 120 away from the cover 110, so that there is a gap between the core package and the cover 110 at the venting structure 1101 of the cover 110. Due to the high temperature resistance of the heat-resistant element 130, when the lower insulator 120 of the cover assembly 100 undergoes a certain degree of melting, softening and deformation under the influence of the high temperature of the energy storage battery core package, The heat-resistant component 130 will not deform significantly under high temperatures, thus enabling it to stably support the core pack. This ensures that the core pack and the cover 110 maintain a certain distance at the venting structure 1101 of the cover 110, preventing the core pack from moving towards the cover 110 and blocking the venting structure 1101. When the explosion-proof valve 140 is opened, the venting structure 1101 of the cover 110 can remain connected to the interior of the energy storage battery, allowing the high-pressure gas inside the energy storage battery to continue to be discharged through the venting structure 1101.

[0046] In this embodiment, the heat-resistant component 130 can be fixedly connected to the cover 110 or the lower insulating component 120, thereby maintaining the stable position of the heat-resistant component 130 relative to the venting structure 1101. This helps to maintain a stable gap between the cover 110 and the lower insulating component 120 at the venting structure 1101 of the cover 110. The heat-resistant component 130 can be welded to the cover 110, or it can be injection molded to the lower insulating component 120. Alternatively, the lower insulating component 120 and the cover 110 can clamp the heat-resistant component 130 to position it, thus fixing its position relative to the cover 110 and the lower insulating component 120.

[0047] Figure 3 This is a cross-sectional view of one embodiment of the cover assembly provided in this application, wherein the cutting plane is perpendicular to the width direction of the cover. Figure 4 yes Figure 3 Enlarged view of point B in the middle. Figure 5 This is a schematic diagram of the structure of one embodiment of the heat-resistant component provided in this application. Figures 3 to 5As shown, the heat-resistant component 130 may include a support portion 1301 and two connecting portions 1303. The two connecting portions 1303 respectively abut against the side of the cover 110 facing the lower insulator 120, so that there is a gap between the support portion 1301 and the cover 110 at the venting structure 1101 of the cover 110, so that gas can be discharged from the venting structure 1101 after passing through the gap between the support portion 1301 and the cover 110 at the venting structure 1101 of the cover 110. The support portion 1301 can be used to pass through the through hole 1200 of the lower insulator 120 and abut against the core package located on the side of the lower insulator 120 opposite to the cover 110, so that there is a gap between the core package and the cover 110 at the venting structure 1101 of the cover 110.

[0048] The two connecting portions 1303 can be respectively protruding from the side of the support portion 1301 facing the cover 110, so that after the two connecting portions 1303 respectively abut against the side of the cover 110 facing the lower insulating member 120, a gap is formed between the support portion 1301 and the cover 110 at the venting structure 1101 of the cover 110.

[0049] Alternatively, the two connecting parts 1303 can be arranged along the width direction of the cover 110 so that the two connecting parts 1303 can more stably support the support part 1301.

[0050] like Figure 4 and Figure 5 As shown, the heat-resistant component 130 includes an exhaust channel 1300 that communicates with the exhaust structure 1101 of the cover 110, so that after the explosion-proof valve 140 is opened, the gas inside the energy storage battery can be discharged from the exhaust structure 1101 of the cover 110 through the exhaust channel 1300.

[0051] In some embodiments, the flow area of ​​the exhaust channel 1300 can be greater than or equal to the flow area of ​​the explosion-proof valve 140 after it is opened. This allows the gas inside the energy storage battery to pass through the exhaust channel 1300 more quickly and be discharged from the exhaust structure 1101 of the cover 110, avoiding the influence of the heat-resistant component 130 on the exhaust speed of the energy storage battery.

[0052] In some embodiments, such as Figure 4 and Figure 5 As shown, the exhaust channel 1300 includes a first channel 1302, which penetrates the support portion 1301 along the thickness direction Z of the cover 110, so that the first channel 1302 can correspond to the position of the exhaust structure 1101 and the explosion-proof valve 140. When the explosion-proof valve 140 is opened, the gas inside the energy storage battery can be quickly discharged from the exhaust structure 1101 through the first channel 1302.

[0053] In addition, the exhaust channel 1300 may also include a second channel 1306, which is located between the two connecting portions 1303 of the heat-resistant component 130 and extends through the heat-resistant component 130 along the length direction X of the cover 110. The length direction X, width direction Y, and thickness direction Z of the cover 110 are perpendicular to each other. Thus, the gas located on both sides of the heat-resistant component 130 along the length direction X of the cover 110 can be discharged through the second channel 1306, then through the explosion-proof valve 140 and the exhaust structure 1101, thereby further increasing the flow area of ​​the exhaust channel 1300. This allows the gas inside the energy storage battery to quickly pass through the exhaust channel 1300 of the heat-resistant component 130 and be discharged from the exhaust structure 1101 after the explosion-proof valve 140 is opened.

[0054] Specifically, when the exhaust passage 1300 includes a first passage 1302 and a second passage 1036, the flow area of ​​the exhaust passage 1300 is the sum of the flow areas of the first passage 1302 and the second passage 1036. When the exhaust passage 1300 includes only the first passage 1302 or the second passage 1036, the flow area of ​​the exhaust passage 1300 is the flow area of ​​either the first passage 1302 or the second passage 1036.

[0055] Specifically, the support portion 1301 of the heat-resistant component 130 is plate-shaped, and one side of the plate of the heat-resistant component 130 is spaced apart from the cover 110. Connecting portions 1303 are provided at both ends of the support portion 1301 along the width direction Y of the cover 110, and the connecting portions 1303 extend along the length direction X of the cover 110. The support portion 1301 and the two connecting portions 1303 are an integral structure.

[0056] In some embodiments, the lower insulating member 120 may include a protrusion 1201 corresponding to the venting structure 1101. The protrusion 1201 may be used to abut against the core package to restrict the core package from moving toward the cover 110, so that the core package cover 110 maintains a certain distance at the venting structure 1101 of the cover 110.

[0057] A through hole 1200 can be provided in the protrusion 1201, forming a receiving cavity 1203 between the protrusion 1201 and the cover 110. The through hole 1200 and the venting structure 1101 are respectively connected to the receiving cavity 1203. At least a portion of the heat-resistant component 130 is disposed within the receiving cavity 1203. Thus, the heat-resistant component 130 can be positioned through the receiving cavity 1203, making the position of the heat-resistant component 130 more stable and facilitating installation.

[0058] In some embodiments, the protrusion 1201 may abut against the side of the heat-resistant member 130 away from the cover 110 to restrict the heat-resistant member 130 from moving toward the side away from the cover 110, thereby making the position of the heat-resistant member 130 more stable.

[0059] The protrusion 1201 may include two limiting surfaces 1210 located within the through hole 1200, with the two limiting surfaces 1210 disposed opposite to each other. The distance between the two limiting surfaces 1210 gradually decreases in the direction away from the cover 110.

[0060] Correspondingly, the heat-resistant component 130 includes two first abutting surfaces 1307, which abut against two limiting surfaces 1210 in a one-to-one manner, thereby limiting the heat-resistant component 130 by the two limiting surfaces 1210 and restricting the heat-resistant component 130 from moving toward the side away from the cover 110.

[0061] The two limiting surfaces 1210 can be distributed along the length direction X of the cover 110 on both sides of the through hole 1200. Alternatively, the two limiting surfaces 1210 can be distributed along the width direction Y of the cover 110 on both sides of the through hole 1200. Furthermore, the distribution direction of the two limiting surfaces 1210 can be set at an angle to both the length direction X and the width direction Y of the cover 110. The specific arrangement depends on the structure of the heat-resistant component 130 and the lower insulating component 120.

[0062] Specifically, the two limiting surfaces 1210 of the protrusion 1201 are distributed on both sides of the through hole 1200 along the length direction X of the cover 110. The limiting surfaces 1210 are planar and parallel to the width direction Y of the cover 110. The two first abutting surfaces 1307 of the heat-resistant member 130 are distributed on both sides of the heat-resistant member 130 along the length direction X of the cover 110. The distance between the two first abutting surfaces 1307 gradually decreases in the direction away from the cover 110. The first abutting surfaces 1307 are planar and parallel to the corresponding limiting surfaces 1210.

[0063] Therefore, when the two first contact surfaces 1307 abut against the two limiting surfaces 1210 in a one-to-one correspondence, the first contact surfaces 1307 can fit with the corresponding limiting surfaces 1210, which helps to improve the limiting effect of the protrusion 1201 on the heat-resistant part 130.

[0064] like Figure 4 and Figure 5 As shown, the heat-resistant component 130 includes a support portion 1301 and two connecting portions 1303. The two connecting portions 1303 respectively abut against the side of the cover 110 facing the lower insulating component 120, so that there is a gap between the support portion 1301 and the cover 110 at the exhaust structure 1101. In some embodiments, the two first abutting surfaces 1307 can be located on both sides of the support portion 1301, so that the two first abutting surfaces 1307 abut against the two limiting surfaces 1210 one-to-one, which has a better limiting effect on the support portion 1301.

[0065] In some embodiments, such as Figure 2As shown, at least one first pressure relief hole 1204 penetrating the protrusion 1201 can be provided on at least one limiting surface 1210. The gap between the support portion 1301 of the heat-resistant member 130 and the cover 110 communicates with at least one first pressure relief hole 1204. Therefore, when the pressure inside the energy storage battery is too high, the high-pressure gas inside the energy storage battery can pass sequentially through the first pressure relief hole 1204 and the gap between the support portion 1301 and the cover 110, and then be discharged from the exhaust structure 1101. The provision of the first pressure relief hole 1204 increases the flow area of ​​the protrusion 1201 for high-pressure gas to pass through, which is beneficial to improving the pressure relief efficiency.

[0066] Specifically, multiple first pressure relief holes 1204 are provided on the two limiting surfaces 1210 respectively, and the multiple first pressure relief holes 1204 on the same limiting surface 1210 are spaced apart along the width direction Y of the cover 110, so as to further increase the flow area of ​​the protrusion 1201 for high pressure gas to pass through.

[0067] In some embodiments, such as Figure 2 As shown, a recessed groove 122 is formed on the surface of the lower insulating member 120 near the cover 110. This groove 122 corresponds to the exhaust structure 1101, and a second pressure relief hole 1221 is provided on the bottom surface of the groove 122, penetrating the lower insulating member. By forming a recessed groove 122 on the surface of the lower insulating member 120 near the cover 110, a certain distance can be maintained between the bottom surface of the groove 122 and the cover 110. When the second pressure relief hole 1221 is provided on the bottom surface of the groove 122, the second pressure relief hole 1221 can be stably connected to the exhaust structure 1101 through the distance between the bottom surface of the groove 122 and the cover 110. When the internal pressure of the energy storage battery is too high, the high-pressure gas inside the battery can pass through the second pressure relief hole 1221 and the gap between the bottom surface of the sink 122 and the cover 110 in sequence, and then be discharged from the exhaust structure 1101. The setting of the second pressure relief hole 1221 increases the flow area of ​​the lower insulating member 120 for high-pressure gas to pass through, which is beneficial to improving the pressure relief efficiency.

[0068] like Figure 4 As shown, the protrusion 1201 has a second abutment surface 1206 on the side opposite to the cap 110 for abutting against the core package. In some embodiments, the protrusion 1201 further includes a transition surface 1207 extending from the second abutment surface 1206 toward the limiting surface 1210, the transition surface 1207 extending along the thickness direction Z of the cap 110.

[0069] Understandably, since the distance between the two limiting surfaces 1210 gradually decreases in the direction away from the cap 110, if the limiting surface 1210 extends directly to the side of the protrusion 1201 away from the cap 110 and intersects with the second abutment surface 1206, a sharp acute angle structure will be formed at the intersection of the limiting surface 1210 and the second abutment surface 1206. When the second abutment surface 1206 abuts against the core package, the acute angle structure is likely to scratch the core package.

[0070] In this embodiment, the protrusion 1201 further includes a transition surface 1207 extending from the second abutment surface 1206 to the limiting surface 1210. The transition surface 1207 extends along the thickness direction Z of the cover 110, which allows the angle formed at the intersection of the transition surface 1207 and the second abutment surface 1206 to be larger, which helps to reduce the risk of scratching the core package at the intersection of the transition surface 1207 and the second abutment surface 1206.

[0071] It should be noted that the transition surface 1207 can be parallel to the thickness direction Z of the cover 110, or it can form a small angle with the thickness direction Z of the cover 110, as long as the intersection of the transition surface 1207 and the second contact surface 1206 is not likely to scratch the core package.

[0072] Specifically, transition surfaces 1207 are formed between the two limiting surfaces 1210 and the second abutment surface 1206. The two transition surfaces 1207 are distributed on both sides of the through hole 1200 along the length direction X of the cover 110. The transition surfaces 1207 are perpendicular to the thickness direction Z of the cover 110 and perpendicular to the second abutment surface 1206. The support portion 1301 of the heat-resistant component 130 includes a mating portion 1304 located between the two transition surfaces 1207, and the shape of the mating portion 1304 is adapted to the shape of the portion of the through hole 1200 located between the two transition surfaces 1207.

[0073] In some embodiments, such as Figure 4 As shown, the surface of the heat-resistant element 130 facing away from the cover 110 can be flush with the surface of the protrusion 1201 facing away from the cover 110. Thus, both the heat-resistant element 130 and the protrusion 1201 of the lower insulation element 130 can abut against the core package to support it.

[0074] Specifically, the thickness of the heat-resistant component 130 in the thickness direction Z of the cover 110 can be made equal to the thickness of the protrusion 1201 of the lower insulating component 120 in the thickness direction Z of the cover 110, so that after the heat-resistant component 130 abuts against the side of the cover 110 facing the lower insulating component 120, the surface of the heat-resistant component 130 away from the cover 110 is flush with the surface of the protrusion 1201 away from the cover 110.

[0075] In other embodiments, the heat-resistant element 130 may extend beyond the surface of the protrusion 1201 facing away from the cap 110, such that the distance from the surface of the heat-resistant element 130 facing away from the cap 110 to the cap 110 is greater than the distance from the surface of the protrusion 1201 facing away from the cap 110 to the cap 110. In this case, the core package is mainly supported by the heat-resistant element 130, and a gap exists between the core package and the cap 110 at the venting structure 1101 of the cap 110.

[0076] Alternatively, the distance from the surface of the heat-resistant element 130 facing away from the cover 110 to the cover 110 can be less than the distance from the surface of the protrusion 1201 facing away from the cover 110 to the cover 110. In this case, the core package is mainly supported by the lower insulation element 120, so that there is a gap between the core package and the cover 110 at the venting structure 1101 of the cover 110. When the lower insulation element 120 deforms, the core package is again supported by the heat-resistant element 130, so that there is a gap between the core package and the cover 110 at the venting structure 1101 of the cover 110.

[0077] In some embodiments, such as Figure 5 As shown, the width of the heat-resistant component 130 along the width direction Y of the cover 110 is L, and L satisfies: L≥(a-1)*H; where a is the number of core packages and is greater than or equal to 2; H is the thickness of the core package in the width direction Y of the cover 110.

[0078] Therefore, when the energy storage battery includes multiple core packs arranged along the width direction Y of the cover 110, the width L of the heat-resistant element 130 along the width direction Y of the cover 110 can be made large enough so that the high-pressure gas at each core pack can be discharged from the exhaust structure 1101 through the exhaust channel 1300 of the heat-resistant element 130.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, the lower insulating member 120 includes two sub-plastics 121 separately disposed along the length X of the cover 110. The protrusion 1201 of the lower insulating member 120 includes sub-protrusions 1202 distributed among the two sub-plastics 121, and a receiving cavity 1203 is formed between the two sub-protrusions 1202 and the cover 110. A through hole 1200 is formed between the two sub-protrusions 1202. 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] In this embodiment, the lower insulating member 120 can be made of plastic or other insulating materials, and there are no limitations on this. Specifically, the lower insulating member 120 can be made of plastic. Additionally, the cover 110 can be made of metal. Specifically, the cover 110 can be a sheet of aluminum.

[0081] In this embodiment, the melting temperature of the heat-resistant component 130 can be greater than that of the lower insulation component 120. This means that when the lower insulation component 120 deforms or even melts under high temperatures, the melting or deformation of the heat-resistant component 130 is less, thus providing better support for the core package. Furthermore, the melting temperature of the heat-resistant component 130 can be greater than the thermal runaway temperature of the battery cell. This ensures that in the event of thermal runaway of the battery cell, the heat-resistant component 130 will not undergo significant deformation, maintaining good support for the core package.

[0082] In some embodiments, the material of the heat-resistant component 130 may include materials capable of withstanding high temperatures, such as metals and / or ceramics, without limitation. It is understood that the material of the heat-resistant component 130 may be entirely metal or ceramic, or the material of the heat-resistant component 130 may be a combination of ceramics.

[0083] This application also provides an energy storage battery, which includes a cover plate assembly. The specific structure of the cover plate assembly is as described in the above embodiments. Since this energy storage battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0084] The energy storage battery provided in this application embodiment has a heat-resistant element 130 provided on the side of the cover 110 of the cover assembly 100 facing the lower insulator 120. The heat-resistant element 130 passes through the through hole 1200 of the lower insulator 120 and abuts against the core pack located on the side of the lower insulator 120 away from the cover 110, so that there is a gap between the core pack and the cover 110 at the venting structure 1101 of the cover 110. Due to the high temperature resistance of the heat-resistant element 130, when the lower insulator 120 of the cover assembly 100 is affected by the high temperature of the energy storage battery core pack, it will undergo a certain degree of melting and softening. After forming, the heat-resistant component 130 will not undergo significant deformation under high temperature, thus enabling the heat-resistant component 130 to stably support the core package. This ensures that the core package and the cover 110 always maintain a certain distance at the venting structure 1101 of the cover 110, preventing the core package from moving towards the cover 110 and blocking the venting structure 1101. When the explosion-proof valve 140 is opened, the venting structure 1101 of the cover 110 can remain in communication with the interior of the energy storage battery, allowing the high-pressure gas inside the energy storage battery to continue to be discharged through the venting structure 1101.

[0085] The energy storage battery may include a casing and a core pack, with the core pack disposed inside the casing. The casing includes a cover assembly 100, with the lower insulating member 120 of the cover assembly 100 located on the side of the cover 110 facing the core pack.

[0086] In some embodiments, the energy storage battery may include multiple cell packs, which are stacked along the width direction Y of the cover 110. The thickness direction of the cell packs is parallel to the width direction Y of the cover 110.

[0087] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A cover plate assembly, characterized in that, include: The cap is equipped with a venting structure. A lower insulating component is disposed opposite to the cover, and the lower insulating component has a through hole; A heat-resistant element is located on the side of the cover facing the lower insulator. The heat-resistant element is used to pass through the through hole and abut against the core package located on the side of the lower insulator opposite to the cover, so that there is a gap between the cover and the core package at the exhaust structure.

2. The cover plate assembly as claimed in claim 1, characterized in that, The heat-resistant component includes a support portion and two connecting portions, which respectively abut against the side of the cover facing the lower insulating component, so that there is a gap between the support portion and the cover at the exhaust structure.

3. The cover plate assembly as claimed in claim 2, characterized in that, The cover plate assembly also includes an explosion-proof valve disposed in the exhaust structure, and the heat-resistant component includes an exhaust channel communicating with the exhaust structure, wherein the flow area of ​​the exhaust channel is greater than or equal to the flow area of ​​the explosion-proof valve after it is opened.

4. The cover plate assembly as claimed in claim 3, characterized in that, The exhaust channel includes a first channel that extends through the support portion along the thickness direction of the cover.

5. The cover plate assembly as claimed in claim 3, characterized in that, The two connecting parts protrude from the side of the support facing the cover, and the two connecting parts are arranged along the width direction of the cover; The exhaust channel also includes a second channel, which is located between the two connecting parts and extends through the heat-resistant component along the length of the cover. The length, width, and thickness directions of the cover are perpendicular to each other.

6. The cover plate assembly as claimed in any one of claims 1 to 5, characterized in that, The lower insulating member includes a protrusion corresponding to the exhaust structure, the protrusion having the through hole, and a receiving cavity formed between the protrusion and the cover. The through hole and the exhaust structure are respectively connected to the receiving cavity, and at least a portion of the heat-resistant member is located in the receiving cavity.

7. The cover plate assembly as claimed in claim 6, characterized in that, The protrusion abuts against the side of the heat-resistant component away from the cover to restrict the heat-resistant component from moving toward the side away from the cover.

8. The cover plate assembly as claimed in claim 7, characterized in that, The protrusion includes two limiting surfaces located within the through hole, the two limiting surfaces being disposed opposite to each other; the distance between the two limiting surfaces gradually decreases in the direction away from the cover; The heat-resistant component includes two first abutting surfaces, which abut against the two limiting surfaces one by one.

9. The cover plate assembly as claimed in claim 8, characterized in that, The heat-resistant component includes a support portion and two connecting portions, the two connecting portions respectively abutting against the side of the cover facing the lower insulating component, so that there is a gap between the support portion and the cover at the exhaust structure; the two first abutting surfaces are located on both sides of the support portion.

10. The cover plate assembly as claimed in claim 9, characterized in that, At least one of the limiting surfaces is provided with at least one first pressure relief hole penetrating the protrusion; the gap between the support and the cover communicates with at least one of the first pressure relief holes.

11. The cover plate assembly as claimed in claim 8, characterized in that, The protrusion has a second contact surface on the side opposite to the cap for abutting against the core package. The protrusion also includes a transition surface extending from the second contact surface to the limiting surface, the transition surface extending along the thickness direction of the cap.

12. The cover plate assembly as claimed in claim 8, characterized in that, The two limiting surfaces are distributed on both sides of the through hole along the length of the cover.

13. The cover plate assembly as claimed in claim 6, characterized in that, The surface of the heat-resistant component facing away from the cover is flush with the surface of the protrusion facing away from the cover.

14. The cover plate assembly as claimed in any one of claims 1 to 5, characterized in that, The surface of the lower insulating member near the cover is recessed to form a groove, the groove is provided corresponding to the exhaust structure, and a second pressure relief hole is provided on the bottom surface of the groove, the second pressure relief hole penetrating the lower insulating member.

15. The cover plate assembly as claimed in any one of claims 1 to 5, characterized in that, The width of the heat-resistant component along the width direction of the cover is L, where L≥(a-1)*H; where a is the number of the core packages and is greater than or equal to 2; and H is the thickness of the core package in the width direction of the cover.

16. The cover plate assembly as claimed in any one of claims 1 to 5, characterized in that, The heat-resistant component is made of metal or ceramic.

17. An energy storage battery, characterized in that, Includes the cover plate assembly as described in any one of claims 1 to 16.

Images