Cover plate insulator and battery

Abstract

This application relates to the field of battery technology, and more particularly to a cover plate insulator and a battery. The cover plate insulator includes an insulating component, a supporting component, a fastening assembly, and a folding connection portion. The supporting component includes an insulating support portion. The folding connection portion is disposed at one end of the cover plate insulator in a second direction, and the folding connection portion connects the insulating component and the insulating support portion. The fastening assembly includes a first fastening member and a second fastening member that can fasten to each other. The first fastening member is disposed on the insulating component, the second fastening member is disposed on the insulating support portion, and the fastening assembly is disposed on the other side of the cover plate insulator in the second direction. The electrode tabs of the electrode assembly can extend from the side of the cover plate insulator on the side where the fastening assembly is located in the second direction and connect electrically between the insulating component and the insulating support portion to the cover plate. According to the cover plate insulator and battery provided in this application, the possibility of abnormal displacement of the electrode tabs due to settlement of the electrode assembly is reduced, and the assembly efficiency and reliability of the battery structure are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cover plate insulator and a battery. Background Technology

[0002] In the field of new energy battery technology, the structural safety of battery modules or battery packs is crucial. In existing technologies, battery modules and packs often have the terminals and explosion-proof valves positioned above the battery. This means that in the event of thermal runaway, the ejected material from the explosion-proof valves directly threatens the passenger compartment, posing a serious safety hazard. To address this issue, the industry has proposed a bottom-venting solution, placing the explosion-proof valves below the battery to direct the ejected material downwards towards the equipment.

[0003] However, the bottom venting scheme has a key technical flaw: when the explosion-proof valve is located below the battery, the electrode tabs of the electrode assembly are positioned below the direction of gravity of the electrode assembly, and the tabs need to pass through the electrode assembly to achieve electrical connection with the cover plate. At this time, there is a lack of dedicated support and constraint structure around the tabs. During battery use and transportation, the electrode assembly is prone to sinking or displacement due to its own gravity. The tabs, due to the loss of effective restraint, will shift with the electrode assembly and are easily inserted into the electrode assembly, causing a short circuit between the positive and negative electrode plates. This, in turn, increases the risk of battery thermal runaway and severely limits the safe application of the bottom venting scheme. Utility Model Content

[0004] The purpose of this application is to provide a cover plate insulator and a battery to address, to some extent, the technical problem in the prior art where, when the explosion-proof valve is located below the battery, the electrode tabs of the electrode assembly are positioned below the direction of gravity of the electrode assembly, and the tabs need to pass through the electrode assembly to achieve electrical connection with the cover plate. In this case, there is a lack of dedicated support and constraint structures around the tabs. During battery use and transportation, the electrode assembly is prone to sinking or displacement due to its own gravity. The tabs, lacking effective restraint, shift with the electrode assembly and are easily inserted into the electrode assembly, causing a short circuit between the positive and negative electrode plates, thus increasing the risk of battery thermal runaway and severely limiting the safe application of the bottom venting scheme.

[0005] According to a first aspect of this application, a cover plate insulator is provided for a battery, the battery including a cover plate and an electrode assembly, the cover plate insulator including an insulating component, a supporting component, a fastening assembly and a folding connection portion, wherein the cover plate, the insulating component, the supporting component and the electrode assembly are arranged sequentially along a first direction when the battery is in use; The supporting component includes an insulating supporting portion, and the folding connecting portion is disposed at one end of the cover plate insulating member in a second direction, and the folding connecting portion connects the insulating member and the insulating supporting portion; The fastening assembly includes a first fastening member and a second fastening member that can fasten with each other. The first fastening member is disposed on the insulating member, the second fastening member is disposed on the insulating support portion, and the fastening assembly is disposed at the other end of the cover plate insulating member in a second direction. The electrode lugs of the electrode assembly can extend from the side of the cover plate insulator on the side where the fastening assembly is located in the second direction and be electrically connected between the insulating component and the insulating support portion, wherein the second direction is perpendicular to the first direction.

[0006] Preferably, the cover plate insulation extends along a third direction, which is perpendicular to the second direction, and the first direction is perpendicular to the plane defined by the second direction and the third direction. The number of fastening components is multiple, and the multiple fastening components are spaced apart along the third direction.

[0007] Preferably, the distance between two adjacent fastening components in the third direction is greater than the size of the tab in the third direction.

[0008] Preferably, the insulating support portion is provided with a clearance notch, which is located at one end of the insulating support portion in the second direction near the second fastening member, and the electrode tab extends through the clearance notch between the insulating component and the insulating support portion.

[0009] Preferably, the insulating support includes a support body and a support rib connected to each other, the support body and the support rib are spaced apart along the first direction, the support rib abuts against the insulating component, and the support body abuts against the pole group.

[0010] Preferably, the supporting body is provided with supporting stiffeners at both ends in the second direction; The second fastener is disposed on the support rib plate at the end away from the folded connection portion.

[0011] Preferably, the insulating support further includes an elastic support member disposed on the support body; The elastic support includes a support plate and an elastic rib. The support body is provided with a through-hole. The support plate is disposed in the through-hole. The elastic rib protrudes from the support body to the side away from the pole group. The elastic rib connects the support plate and the support body so that the elastic rib can elastically move along the first direction. When the elastic support is in its natural state, the support plate protrudes along the first direction toward the side where the pole group is located, relative to the support body.

[0012] Preferably, the support component further includes a connecting vent and at least two insulating support portions, the at least two insulating support portions being disposed along the third direction, and adjacent two insulating support portions being connected via the connecting vent.

[0013] Preferably, the insulating component, the supporting component, the fastening assembly, and the folding connection are all integrally injection molded parts.

[0014] According to a second aspect of this application, a battery is provided, including the cover plate insulator described in any of the above technical solutions, and thus has all the beneficial technical effects of the cover plate insulator, which will not be repeated here.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The cover plate insulation component provided in this application consists of a cover plate, an insulating component, a supporting component, and an electrode assembly arranged sequentially along a first direction. This allows the supporting component to directly support the electrode assembly, counteracting the downward settling tendency caused by the electrode assembly's own weight and fundamentally reducing the possibility of abnormal electrode tab displacement due to settling. A folded connecting part connects the insulating component and the insulating supporting part at one end in the second direction, and a fastening assembly on the other side in the second direction fixes their positions through the fastening of a first fastening member and a second fastening member, creating a space with a stable shape and fixed position between the insulating component and the supporting component. The electrode tab extends from the side of the fastening assembly into this space and is electrically connected to the cover plate. This space provides circumferential constraint on the electrode tab, preventing it from shifting or inserting into the electrode assembly when the electrode assembly shakes or settles slightly, effectively blocking the risk of short circuits. The insulating component is located between the cover plate and the supporting component, preventing unnecessary electrical connections between the electrode tab and the cover plate or between the electrode tab and other metal components, ensuring stable battery electrical performance. In addition, the flexible connection between the insulating and supporting components is achieved through the folded connecting part. Combined with the detachable fastening structure of the fastening assembly, assembly can be completed without complex fasteners, which reduces the difficulty of the production process and improves the assembly efficiency and reliability of the battery structure.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1A schematic diagram of the isometric structure of the cover plate insulating component and the assembly structure of the cover plate provided in the embodiments of this application; Figure 2 This is another isometric structural schematic diagram of the cover plate insulating component and the assembly structure of the cover plate provided in the embodiments of this application; Figure 3 A schematic diagram of the battery in its unfolded state, provided in an embodiment of this application. Figure 4 A schematic diagram of the cross-sectional structure of the battery obtained by a planar sectioner defined along a first direction and a second direction, as provided in an embodiment of this application; Figure 5 A schematic diagram of the cross-sectional structure of the battery obtained by a planar sectioner along a first direction and a third direction, as provided in the embodiments of this application; Figure 6 This is a front view of the battery in its unfolded state, as provided in an embodiment of this application.

[0019] Figure label: 1-Insulating component; 11-First fastening component; 21-Insulating support part; 211-Support body; 212-Support rib; 213-Elastic support component; 2131-Support plate; 2132-Elastic rib; 214-Avoidance notch; 22-Connecting exhaust part; 221-Ventilation hole; 23-Second fastening component; 3-Folding connection part; 40-Cover plate body; 41-Pole post; 42-Explosion-proof valve; 50-Pole group; 51-Pole lug.

[0020] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following reference Figures 1 to 6 This application describes a cover plate insulator and a battery according to some embodiments.

[0027] See Figures 1 to 6 As shown, an embodiment of the first aspect of this application provides a cover plate insulator for a battery. The battery includes a cover plate and an electrode assembly 50. The cover plate insulator includes an insulating component 1, a supporting component, a fastening assembly, and a folding connection portion 3. When the battery is in use, the cover plate, insulating component 1, supporting component, and electrode assembly 50 are arranged sequentially along a first direction F1. The supporting component includes an insulating support portion 21. The folding connection portion 3 is disposed at one end of the cover plate insulator in a second direction F2, and the folding connection portion 3 connects the insulating component 1 and the insulating support portion 21. The fastening assembly includes a first fastening member 11 and a second fastening member 23 that can fasten each other. The first fastening member 11 is disposed on the insulating component 1, the second fastening member 23 is disposed on the insulating support portion 21, and the fastening assembly is disposed on the other side of the cover plate insulator in the second direction F2. The electrode tab 51 of the electrode assembly 50 can extend from the side of the cover plate insulator on the side where the fastening assembly is located in the second direction F2 into the space between the insulating member 1 and the insulating support 21 and electrically connect with the cover plate. The second direction F2 intersects the first direction F1.

[0028] According to the above-mentioned technical features, the cover plate insulation component, the cover plate, the insulation component 1, the support component and the pole group 50 are arranged in sequence along the first direction F1, so that the support component can directly support the pole group 50, counteract the downward sinking trend caused by the weight of the pole group 50 itself, and reduce the possibility of abnormal displacement of the pole tab 51 due to sinking of the pole group 50 from the root. The folding connection part 3 connects the insulation component 1 and the insulation support part 21 at one end of the second direction F2, and the fastening assembly fixes the position of the two on the other side of the second direction F2 by the fastening of the first fastening part 11 and the second fastening part 23, so that a space with stable shape and fixed position is formed between the insulation component 1 and the support component. The tab 51 extends into the space from the side where the fastening assembly is located and is electrically connected to the cover plate. This space provides circumferential constraint on the tab 51, preventing it from shifting or inserting into the electrode assembly 50 when the electrode assembly 50 shakes or settles slightly, effectively blocking the risk of short circuits. The insulating component 1 is located between the cover plate and the supporting component, preventing unnecessary electrical connections between the tab 51 and the cover plate or between the tab 51 and other metal components, ensuring stable battery electrical performance. In addition, the flexible connection between the insulating component 1 and the supporting component is achieved through the folded connecting part 3. Combined with the detachable fastening structure of the fastening assembly, assembly can be completed without complex fasteners, reducing the difficulty of the manufacturing process and improving the assembly efficiency and reliability of the battery structure.

[0029] Preferably, such as Figures 1 to 3 As shown, the aforementioned cover plate insulation can extend along a third direction F3, where the third direction F3 intersects with the second direction F2, and the first direction F1 intersects with the plane defined by the second direction F2 and the third direction F3. Multiple fastening components can be arranged at intervals along the third direction F3. This arrangement of multiple fastening components along the third direction F3 creates multiple points of fixation along the extension direction of the cover plate insulation, enhancing the connection stability between the insulation component 1 and the support component. This avoids the problem of uneven force distribution and excessive gaps at both ends caused by a single fastening point when the cover plate insulation is long along the third direction F3, ensuring the stability of the shape of the accommodating space between the insulation component 1 and the support component, further constraining the displacement of the tab 51 in the third direction F3, and reducing the risk of the tab 51 shifting due to loose support structure. Simultaneously, the intersection of the third direction F3 with the second direction F2 and the first direction F1 makes the structural layout more adaptable to the internal space of the battery, ensuring that the support and constraint effects uniformly cover the electrode group 50 and the tab 51.

[0030] like Figures 1 to 6 As shown, F1 in the figure can be an example of the first direction F1 described above, F2 in the figure can be an example of the second direction F2 described above, and F3 in the figure can be an example of the third direction F3 described above. Preferably, as Figures 1 to 6As shown in the figure, an example is shown where any two of the three directions, namely the first direction F1, the second direction F2, and the third direction F3, are perpendicular to each other, so as to adapt to the structure of most square batteries. Optionally, the first direction F1 can be the length direction of the square battery, the second direction F2 can be the thickness direction of the square battery, and the third direction F3 can be the width direction of the square battery. When the battery is in use, the first direction F1 can be parallel to the direction of gravity, and the cover plate can be located at the bottom of the battery to adapt to the above-mentioned bottom exhaust scheme structure.

[0031] It should be noted that the first direction F1 mentioned above refers to the relative positional direction of the components when the battery is in use, while Figures 1 to 3 and Figure 6 The images shown all depict the battery or cover in the unfolded state (i.e., the battery cover is not attached to the battery). The positional relationships between the components differ from the relative positions of the components when the battery is in use. Figures 1 to 3 and Figure 6 The first direction F1 was not marked.

[0032] Preferably, such as Figure 6 As shown, the spacing between two adjacent fastening components in the third direction F3 is greater than the size of the tab 51 in the third direction F3. This provides sufficient space for the arrangement of the tab 51 in the third direction F3, avoiding positional interference between the fastening components and the tab 51 in the third direction F3. This prevents the fastening components from squeezing or obstructing the tab 51, ensuring that the tab 51 can smoothly extend between the insulating component 1 and the supporting component using the space between two adjacent fastening components and achieve a stable electrical connection. This reduces the risk of poor contact or short circuits caused by deformation of the tab 51 due to squeezing, thus ensuring the stability of the battery's electrical performance.

[0033] Preferably, such as Figure 3 and Figure 6 As shown, the insulating support portion 21 may be provided with a clearance notch 214. This clearance notch 214 is located at the end of the insulating support portion 21 near the second fastening member 23 in the second direction F2. The aforementioned electrode tab 51 can extend into the space between the insulating component 1 and the insulating support portion 21 through the clearance notch 214. In this way, the clearance notch 214 provides a clear guiding channel for the electrode tab 51, guiding the electrode tab 51 to enter the space between the insulating component 1 and the insulating support portion 21 accurately and smoothly, avoiding bending or displacement of the electrode tab 51 due to obstruction by the edge of the insulating support portion 21 during insertion. By standardizing the insertion path of the electrode tab 51, it is ensured that the electrode tab 51 is always within the preset constraint space, further reducing the possibility of short circuit caused by the electrode tab 51 contacting the electrode assembly 50 due to insertion position deviation.

[0034] Preferably, such as Figure 4As shown, the position of the lead-out tab 51 of the above-mentioned pole group 50 and the clearance notch 214 are directly opposite each other along the first direction F1. In this way, the tab 51 led out from the pole group 50 can be bent once at the clearance notch 214 and enter between the insulating component 1 and the supporting component, further reducing the possibility of the tab 51 contacting the pole group 50, and thus reducing the probability of short circuit caused by inserting the tab 51 into the pole group 50 to almost zero.

[0035] In an embodiment, preferably, such as Figures 1 to 4 As shown, the aforementioned insulating support 21 may include a support body 211 and a support rib 212 connected to each other. The support body 211 and the support rib 212 are spaced apart along the first direction F1. The support rib 212 abuts against the insulating component 1, and the support body 211 abuts against the electrode assembly 50. Thus, the support body 211 directly abuts against the electrode assembly 50, bearing the gravity support of the electrode assembly 50 and counteracting the settlement tendency of the electrode assembly 50. The support rib 212 abuts against the insulating component 1, transmitting the pressure of the insulating component 1 to the support body 211, forming a force transmission chain of "insulating component 1 - support rib 212 - support body 211 - electrode assembly 50". The structural design of the two being spaced apart along the first direction F1 can disperse the supporting force, avoid excessive local stress leading to deformation of the support, enhance the overall supporting strength, more reliably constrain the settlement of the electrode assembly 50, and indirectly ensure the stability of the electrode tab 51 position.

[0036] Preferably, such as Figures 1 to 4 As shown, support ribs 212 can be provided at both ends of the support body 211 in the second direction F2. In this way, the support ribs 212 at both ends of the support body 211 form a symmetrical support structure, so that the force on the insulating component 1 is more balanced, and the structural tilt or gap increase caused by unilateral force is avoided.

[0037] Preferably, such as Figures 1 to 3 As shown, the second fastening member 23 can be disposed on the support rib plate 212 at the end away from the folding connection part 3. In this way, the second fastening member 23 and the folding connection part 3 are respectively located on both sides of the second direction F2, forming a "fixed at both ends" constraint mode, which further improves the tightness of the connection between the insulating component 1 and the supporting component, ensures the stability of the spatial shape of the electrode 51, and reduces the risk of electrode 51 shifting.

[0038] Preferably, such as Figure 1 , Figure 2 and Figure 6As shown, the folding connection part 3 can be a flexible strip structure. One end of the folding connection part 3 in the second direction F2 is attached to the side of the insulating component 1 facing the insulating support part 21, and the other end of the folding connection part 3 in the second direction F2 is attached to the side of the insulating support part 21 facing the insulating component 1. By utilizing the flexibility and bendability of the flexible strip structure, the support component can be unfolded and folded relative to the insulating component 1, thereby facilitating the assembly operation of the cover plate insulating component and other battery components.

[0039] Preferably, such as Figures 1 to 6 As shown, the aforementioned insulating support 21 may further include an elastic support member 213, which is disposed on the support body 211. The elastic support member 213 may include a support plate 2131 and an elastic rib 2132. The support body 211 has a through-hole, the support plate 2131 is disposed within the through-hole, and the elastic rib 2132 protrudes from the support body 211 toward the side opposite to the electrode assembly 50. The elastic rib 2132 connects the support plate 2131 and the support body 211, allowing the elastic rib 2132 to elastically shift along the first direction F1. Thus, the elastic support member 213 provides elastic buffer support for the electrode assembly 50. When the electrode assembly 50 experiences slight settlement due to vibration or gravity, the elastic rib 2132 elastically shifts along the first direction F1, and the elastic restoring force of the support plate 2131 counteracts the settlement trend, preventing the electrode tab 51 from shifting due to rigid settlement of the electrode assembly 50. Meanwhile, the elastic support can adapt to the size error or thermal expansion and contraction deformation of the pole group 50, ensuring that the support function is continuously effective and further reducing the short circuit risk of the pole tab 51 being inserted into the pole group 50.

[0040] Preferably, such as Figure 4 and Figure 5 As shown, when the elastic support 213 is in its natural state, relative to the support body 211, the support plate 2131 protrudes along the first direction F1 toward the side where the pole group 50 is located. This protruding structure can contact the pole group 50 in advance and form a pre-support, which suppresses the settlement trend of the pole group 50 from the initial state, reduces the initial settlement of the pole group 50, and further reduces the probability of position displacement of the pole tab 51 due to settlement.

[0041] Preferably, such as Figures 1 to 6 As shown, both ends of the support plate 2131 in the third direction F3 are connected to the support body 211 via elastic ribs 2132 to ensure the stability and smoothness of the support plate 2131 in supporting the pole group 50 and to prevent the pole group 50 from tilting or shifting during the settling process.

[0042] like Figure 2 and Figure 5As shown in the figure, the cover plate includes a cover plate body 40, an explosion-proof valve 42, and two pole posts 41. The two pole posts 41 are spaced apart along a third direction F3 on the cover plate body 40, and the explosion-proof valve 42 is located on the cover plate body 40 at a position between the two pole posts 41.

[0043] In this embodiment, the supporting component may further include a connecting venting section 22 and two insulating support sections 21. Correspondingly, the connecting venting section 22 may be disposed opposite to the explosion-proof valve 42 of the cover plate along the first direction F1, and the two insulating support sections 21 may be disposed corresponding to the two pole posts 41 along the first direction F1. The two insulating support sections 21 are connected via the connecting venting section 22. On the one hand, the insulating support section 21 can provide corresponding support and constraint for the pole tabs 51 corresponding to the pole posts 41, thereby improving the stability of the support. On the other hand, the connecting venting section 22 connects the two insulating support sections 21 into a whole, thereby enhancing the structural strength of the supporting component. At the same time, the connecting venting section 22 can form a through venting channel, which, in conjunction with the downward venting scheme, guides the thermal runaway gas inside the battery to be discharged downward, preventing the gas from accumulating between the pole group 50 and the supporting component, improving venting efficiency, and further ensuring battery safety.

[0044] Preferably, the connecting exhaust section 22 may be provided with a vent 221 that extends through itself in the first direction F1 to allow gas and electrolyte inside the battery to pass through.

[0045] It should be noted that the structure of the cover plate is not limited to the example of the two pole posts 41. The number of the insulating support parts 21 and the number of the connecting exhaust parts 22 can be adapted according to the structure of the cover plate.

[0046] Preferably, such as Figures 1 to 4 As shown, in the second direction F2, the size of the connecting vent 22 can be larger than the size of the insulating support 21. The size of the connecting vent 22 in the second direction F2 is equal to the size of the insulating component 1 in the second direction F2. The connecting vent 22 and the insulating support 21 are aligned with each other at the ends near the folding connecting portion 3 in the second direction F2. In this way, by utilizing the size difference between the insulating support 21 and the connecting vent 22 and the insulating component 1, the clearance notch 214 is formed on the side of the insulating support 21 away from the folding connecting portion 3 in the second direction F2.

[0047] Preferably, such as Figure 1 and Figure 2As shown, the insulating component 1, supporting component, fastening assembly, and folding connector 3 can be integrated into a single injection-molded part. This ensures a tight connection between the components and a strong overall structural integrity, preventing support failure and loosening of constraints due to gaps or misalignments in the components during assembly. Simultaneously, it reduces the number of parts and assembly steps, lowers production errors and costs, and improves production efficiency. The integrated structure also enhances the overall resistance to deformation, ensuring stable and reliable support and constraint during long-term battery use.

[0048] The second aspect of this application also provides a battery including the above-described cover plate, the above-described electrode group 50, and the cover plate insulating member described in any of the above embodiments, thus possessing all the beneficial technical effects of the cover plate insulating member, which will not be repeated here.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cover insulation, characterized in that For use in a battery, the battery includes a cover plate and an electrode assembly, the cover plate insulation includes an insulation component, a support component, a fastening assembly and a folding connection portion, and when the battery is in use, the cover plate, the insulation component, the support component and the electrode assembly are arranged sequentially along a first direction; The supporting component includes an insulating supporting portion, and the folding connecting portion is disposed at one end of the cover plate insulating member in a second direction, and the folding connecting portion connects the insulating member and the insulating supporting portion; The fastening assembly includes a first fastening member and a second fastening member that can fasten with each other. The first fastening member is disposed on the insulating member, the second fastening member is disposed on the insulating support portion, and the fastening assembly is disposed at the other end of the cover plate insulating member in a second direction. The electrode lugs of the electrode assembly can extend from the side of the cover plate insulator on the side where the fastening assembly is located in the second direction and be electrically connected between the insulating component and the insulating support portion, wherein the second direction is perpendicular to the first direction.

2. The cover plate insulating component according to claim 1, characterized in that, The cover plate insulation extends along a third direction, which is perpendicular to the second direction, and the first direction is perpendicular to the plane defined by the second direction and the third direction. The number of fastening components is multiple, and the multiple fastening components are spaced apart along the third direction.

3. The cover insulation of claim 2, wherein, The distance between two adjacent fastening components in the third direction is greater than the size of the tab in the third direction.

4. The cover insulation of claim 2, wherein, The insulating support portion is provided with a clearance notch, which is located at one end of the insulating support portion in the second direction near the second fastening member. The electrode tab extends through the clearance notch between the insulating component and the insulating support portion.

5. The cover insulation of claim 2, wherein, The insulating support includes a support body and a support rib connected to each other. The support body and the support rib are spaced apart along the first direction. The support rib abuts against the insulating component, and the support body abuts against the pole group.

6. The cover insulation of claim 5, wherein, The supporting body is provided with supporting ribs at both ends in the second direction; The second fastener is disposed on the support rib plate at the end away from the folded connection portion.

7. The cover insulation of claim 5, wherein, The insulating support portion further includes an elastic support member, which is disposed on the support body; The elastic support includes a support plate and an elastic rib. The support body is provided with a through-hole. The support plate is disposed in the through-hole. The elastic rib protrudes from the support body to the side away from the pole group. The elastic rib connects the support plate and the support body so that the elastic rib can elastically move along the first direction. When the elastic support is in its natural state, the support plate protrudes along the first direction toward the side where the pole group is located, relative to the support body.

8. The cover insulation of any one of claims 2-7, wherein, The support component further includes a connecting vent and at least two insulating support portions, the at least two insulating support portions being arranged along the third direction, and adjacent two insulating support portions being connected via the connecting vent.

9. The cover insulation of any one of claims 2-7, wherein, The insulating component, the supporting component, the fastening assembly, and the folding connection are all integrally injection molded parts.

10. A battery, characterized by It includes the cover plate, the electrode assembly, and the cover plate insulation element according to any one of claims 1 to 9.

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