Cover plate insulator, cover plate structure and battery

Abstract

The application relates to the technical field of batteries, in particular to a cover plate insulating piece, a cover plate structure and a battery. The cover plate insulating piece comprises an insulating isolation part, an insulating support part and a bending connecting part. The insulating isolation part and the insulating support part are arranged in a superposed mode along a first direction, the bending connecting part is arranged on one side of the insulating isolation part and the insulating support part in a second direction, and the two ends of the bending connecting part are connected with the insulating support part and the insulating isolation part respectively. The insulating isolation part is used for being attached to one side of a cover plate facing a pole group, the insulating support part is arranged between the pole group and a tab of the pole group, and the tab can be electrically connected with a pole column arranged on the cover plate body from the other side of the insulating isolation part and the insulating support part in the second direction. According to the cover plate insulating piece, the cover plate structure and the battery provided by the application, the pole group is prevented from pressing the tab due to gravity, the overall stability of the cover plate insulating piece is enhanced, the hidden danger of short circuit is reduced, and the safety of the battery is improved.

Description

Technical Field

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

[0002] In the design of battery modules or packs, the placement of the explosion-proof valve directly affects the safety protection effect in the event of thermal runaway. Currently, the battery cover is usually located on top of the battery, which means that the structure of the terminals and explosion-proof valve on the battery cover is mostly facing the passenger compartment. Once the battery experiences thermal runaway, the explosion-proof valve opens towards the passenger compartment, and the high-temperature gas or even flames it emits can directly threaten the safety of the passenger compartment, causing personal injury and property damage.

[0003] If the battery cover is positioned below the battery, it means that the tabs of the terminals connecting the electrode assembly and the battery cover need to be adjusted to be below the direction of gravity of the electrode assembly. As the battery is used, the electrode assembly itself has a certain weight, and it is easy for the electrode assembly to sink under the action of gravity. During the sinking process, the tabs may be pressed into the electrode assembly, causing a short circuit in the battery. This not only affects the normal operation of the battery, but may also exacerbate the risk of thermal runaway. Summary of the Invention

[0004] The purpose of this application is to provide a cover plate insulation component, cover plate structure, and battery to address, to some extent, the technical problems existing in the prior art. Specifically, battery covers are typically positioned above the battery, and in the event of thermal runaway, the explosion-proof valve opens towards the passenger compartment, emitting high-temperature gases or even flames that could directly threaten passenger safety and cause personal injury or property damage. Alternatively, battery covers positioned below the battery are prone to sinking under gravity, causing the electrode assembly to sink into the electrode assembly, leading to a short circuit. This not only affects the normal operation of the battery but may also exacerbate the risk of thermal runaway.

[0005] According to a first aspect of this application, a cover plate insulating member is provided for insulation between the cover plate body of a battery and the electrode assembly, the cover plate insulating member including an insulating isolation part, an insulating support part, and a bending connection part; The insulating isolation part and the insulating support part are stacked together along the first direction, and the bent connection part is disposed on one side of the insulating isolation part and the insulating support part in the second direction. The two ends of the bent connection part are respectively connected to the insulating support part and the insulating isolation part. The second direction is perpendicular to the first direction. The insulating isolation part is used to fit against the side of the cover plate body facing the electrode group. The insulating support part is disposed between the electrode group and the electrode tab of the electrode group. The electrode tab can extend from the other side of the insulating isolation part and the insulating support part in the second direction and be electrically connected to the electrode post disposed on the cover plate body.

[0006] Preferably, it further includes a snap-fit ​​assembly, the snap-fit ​​assembly including a first snap-fit ​​member and a second snap-fit ​​member, wherein the first snap-fit ​​member is provided on the first of the insulating isolation part and the insulating support part, and the second snap-fit ​​member is provided at the corresponding position of the second of the insulating isolation part and the insulating support part; The first and second snap-fit ​​components can be snapped together to fix the insulating isolation part and the insulating support part.

[0007] Preferably, there are multiple snap-fit ​​components, which are divided into multiple columns of connection structures. Each column of connection structure includes at least two snap-fit ​​components. The at least two snap-fit ​​components in the same column are spaced apart along the second direction. The multiple columns of connection structures are spaced apart along a third direction, which is perpendicular to the second direction. The first direction is perpendicular to the plane determined by the second direction and the third direction.

[0008] Preferably, the connecting structure is provided at both ends of the cover plate insulating member in the third direction.

[0009] Preferably, the first snap-fit ​​element is a first variable-diameter snap-fit ​​hole extending along the first direction, and the second snap-fit ​​element is an elastic snap-fit ​​post extending along the first direction; In the first direction, from one end of the first object facing the second object to the other end, the diameter of the first variable diameter card hole gradually decreases; The end of the elastic locking post furthest from the second is provided with a locking protrusion, and the outer diameter of the locking protrusion is greater than the minimum value of the diameter of the first variable diameter locking hole.

[0010] Preferably, the first is the insulating isolation part, and the second is the insulating support part; The first variable diameter locking hole penetrates the insulating isolation part, and a second variable diameter locking hole is also provided at the corresponding position of the cover plate body. The elastic locking post can penetrate the first variable diameter locking hole and engage with the second variable diameter locking hole.

[0011] Preferably, the insulating isolation part, the insulating support part, and the bending connection part are integrated into a flexible injection molded part, and the thickness of the bending connection part is less than the thickness of the insulating isolation part, and the thickness of the bending connection part is less than the thickness of the insulating support part; Alternatively, the bent connection may be a hinge.

[0012] The second aspect of this application also provides a cover plate structure, including the cover plate body and the cover plate insulating member described in any of the above embodiments, and thus has all the beneficial technical effects of the cover plate insulating member, which will not be repeated here.

[0013] The third aspect of this application also provides a battery including the above-described electrode assembly, the cover plate insulator described in any of the above embodiments, or the cover plate structure described in any of the above embodiments, thus possessing all the beneficial technical effects of the cover plate insulator and the cover plate structure, which will not be repeated here.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: The cover plate insulation component provided in this application, through innovative improvements to its structure, effectively solves the problem of short circuits in the electrode tabs caused by the gravity of the electrode assembly in schemes where the battery cover plate is positioned below the battery. Its specific beneficial effects include: 1. An insulating support is provided between the electrode group and the electrode lugs of the electrode group. Its structure, which overlaps with the insulating isolation part along the first direction, forms an effective support for the electrode group, directly resists the gravity of the electrode group itself, and prevents the electrode group from pressing the electrode lugs due to gravity. This reduces the possibility of the electrode lugs being inserted into the electrode group from the root and reduces the risk of short circuit. 2. The bent connection connects the insulating isolation part and the insulating support part, forming a stable integrated structure. This structure enhances the overall stability of the cover plate insulation component, reduces the probability of the insulating support part shifting when bearing the weight of the electrode assembly, and ensures the stability of the relative position of the electrode lug and the electrode assembly; 3. The electrode tab extends from the insulating isolation part and the insulating support part on the other side in the second direction and connects with the electrode post provided on the cover plate body. This structure provides a clear guiding channel for the electrode tab. With the limiting of the insulating support part, it can prevent the electrode tab from shifting or twisting under the influence of the gravity of the electrode group, ensuring that the electrode tab is always in a safe connection position and further reducing the risk of short circuit; 4. The insulating isolation part fits snugly with the cover plate body to achieve reliable insulation. At the same time, the closed space formed with the insulating support part can prevent accidental contact between the electrode assembly and the electrode tab during the descent process. On the basis of support and limit, an additional insulating protective barrier is added to comprehensively improve the safety of the battery.

[0015] 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

[0016] 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.

[0017] Figure 1 A schematic diagram of the battery in its unfolded state, provided in an embodiment of this application. Figure 2 A front view of the battery in its unfolded state, as provided in an embodiment of this application; Figure 3 This is an isometric structural schematic diagram of the cover plate insulating component provided in the embodiments of this application; Figure 4 Another isometric structural schematic diagram of the cover plate insulating component provided in the embodiments of this application; Figure 5 This is a partially enlarged cross-sectional view of the battery provided in an embodiment of this application. Figure 6 This is another cross-sectional structural diagram of the battery provided in an embodiment of this application; Figure 7 for Figure 6 An enlarged structural diagram of the provided cover plate insulation component at point A.

[0018] Figure label: 10-Cover plate body; 11-Pole post; 12-Explosion-proof valve; 13-Insulating sleeve; 14-Insulating ring; 2-Cover plate insulating component; 21-Insulating isolation part; 211-First exhaust zone; 2111-First exhaust hole; 212-First isolation zone; 213-Second isolation zone; 22-Insulating support part; 221-Second exhaust zone; 2211-Second exhaust hole; 222-First support zone; 223-Second support zone; 23-Bending connection part; 24-Snap-fit ​​assembly; 241-First snap-fit ​​component; 2422-Second snap-fit ​​component; 2420-Post body; 2421-Snap-fit ​​protrusion; 2422-Deformation notch; 3-Pole group; 31-Pole lug.

[0019] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The following reference Figures 1 to 7 This application describes cover plate insulation, cover plate structure, and battery according to some embodiments.

[0026] See Figures 1 to 7As shown, an embodiment of the first aspect of this application provides a cover plate insulator for insulating between the cover plate body 10 of a battery and the electrode assembly 3. The cover plate insulator 2 includes an insulating isolation portion 21, an insulating support portion 22, and a bent connecting portion 23. The insulating isolation portion 21 and the insulating support portion 22 are stacked along a first direction F1. The bent connecting portion 23 is disposed on one side of the insulating isolation portion 21 and the insulating support portion 22 in a second direction F2, and both ends of the bent connecting portion 23 are connected to the insulating support portion 22 and the insulating isolation portion 21, respectively. The second direction F2 is perpendicular to the first direction F1. The insulating isolation portion 21 is used to fit against the side of the cover plate facing the electrode assembly 3. The insulating support portion 22 is disposed between the electrode assembly 3 and the electrode tabs 31 of the electrode assembly 3, and the electrode tabs 31 can extend from the other side of the insulating isolation portion 21 and the insulating support portion 22 in the second direction F2 into the space between the insulating isolation portion 21 and the insulating support portion 22 to electrically connect with the electrode post 11 disposed on the cover plate body 10.

[0027] According to the cover plate insulating member 2 provided by the above technical features, by innovatively improving the structure of the cover plate insulating member 2, the problem of short circuit in the electrode tabs 31 caused by gravity in the arrangement of the electrode group 3 in the scheme where the battery cover plate is located below the battery is effectively solved. Specifically, the cover plate insulating member 2 has the following beneficial effects: 1. The insulating support part 22 is disposed between the pole group 3 and the pole tab 31 of the pole group 3. Its structure of overlapping with the insulating isolation part 21 along the first direction F1 forms an effective support for the pole group 3, directly resisting the gravity of the pole group 3 itself, preventing the pole group 3 from pressing the pole tab 31 due to gravity, reducing the possibility of the pole tab 31 being inserted into the pole group 3 from the root, and reducing the risk of short circuit. 2. The bent connecting part 23 connects the insulating isolation part 21 and the insulating support part 22, forming a stable integrated structure. This structure enhances the overall stability of the cover plate insulating part 2, reduces the probability of the insulating support part 22 shifting when subjected to the gravity of the pole group 3, and ensures the stability of the relative position of the pole tab 31 and the pole group 3; 3. The electrode tab 31 extends from the insulating isolation part 21 and the insulating support part 22 on the other side in the second direction F2, and is electrically connected to the electrode post 11 provided on the cover plate body 10. This structure provides a clear guiding channel for the electrode tab 31. With the limiting effect of the insulating support part 22, the electrode tab 31 can be prevented from shifting or twisting under the influence of gravity of the electrode group 3, ensuring that the electrode tab 31 is always in a safe connection position, and further reducing the risk of short circuit; 4. The insulating isolation part 21 is attached to the cover plate body 10 to achieve reliable insulation. At the same time, the closed space formed with the insulating support part 22 can prevent accidental contact between the electrode group 3 and the electrode tab 31 during the descent process. On the basis of support and limit, an insulating protective barrier is added to comprehensively improve the safety of the battery.

[0028] like Figures 5 to 7 As shown in the figure, F1 can be an example of the first direction F1 described above, and F2 can be an example of the second direction F2 described above. For ease of description, the direction intersecting the plane determined by both the second direction F2 and the first direction F1 is defined as the third direction F3. F3 shown in the figure can be an example of the third direction F3 described above. Preferably, as Figures 5 to 7 As shown, any two of the three directions F1, F2, and F3 are perpendicular to each other to accommodate the structure of most square batteries. Preferably, as... Figures 5 to 7 As shown, the first direction F1 can be the length direction of the battery, the second direction F2 can be the thickness direction of the battery, and the third direction F3 can be the width direction of the battery. When the battery is in use, the first direction F1 can be parallel to the direction of gravity.

[0029] It should be noted that the first direction F1, the second direction F2, and the third direction F3 mentioned above refer to the relative positional relationship of the cover plate insulating component 2 assembled inside the battery, while Figures 1 to 4 The diagram shows the state where the cover insulation 2 is not installed inside the battery casing (i.e., the cover insulation 2 is in the unfolded state), which requires folding and bending connection part 23 to be transformed into the unfolded state. Figures 5 to 7 The assembly state shown is not specified to avoid confusion regarding spatial orientation. Figures 1 to 4 The direction is marked.

[0030] Preferably, such as Figures 1 to 7 As shown, the aforementioned cover plate insulation component 2 may further include a snap-fit ​​assembly 24, wherein the snap-fit ​​assembly 24 may include a first snap-fit ​​member 241 and a second snap-fit ​​member 242. The first snap-fit ​​member 241 is provided on the first of the insulating isolation part 21 and the insulating support part 22, and the second snap-fit ​​member 242 is provided at the corresponding position of the second of the insulating isolation part 21 and the insulating support part 22. The first snap-fit ​​member 241 and the second snap-fit ​​member 242 can snap together to fix the insulating isolation part 21 and the insulating support part 22. In this way, through the locking action of the snap-fit ​​assembly 24, the relative position of the insulating isolation part 21 and the insulating support part 22 is ensured to be stable, preventing them from being misaligned or separated under battery vibration or impact conditions, thereby continuously maintaining reliable insulation and support for the electrode group 3 and the electrode tab 31.

[0031] Preferably, such as Figures 1 to 3As shown, there are multiple snap-fit ​​components 24, which are divided into multiple columns of connection structures. Each column of connection structure includes at least two snap-fit ​​components 24. The at least two snap-fit ​​components 24 in the same column are spaced apart along the second direction F2. The multiple columns of connection structures are spaced apart along the third direction F3. In this way, through the multi-column and multi-group snap-fit ​​layout, distributed fixing points are formed in the two-dimensional plane, making the connection force distribution between the insulating isolation part 21 and the insulating support part 22 more uniform, and the ability to resist multi-angle external force interference is stronger, further enhancing the structural stability.

[0032] Preferably, such as Figures 1 to 3 As shown, the cover plate insulating part 2 has connecting structures at both ends in the third direction F3, thus forming stronger anchoring points at the edge of the structure, effectively suppressing the warping or separation tendency of the insulating isolation part 21 and the insulating support part 22 in the third direction F3.

[0033] In an embodiment, such as Figures 1 to 4 and Figure 6 As shown, the cover plate body 10 is equipped with a pole post 11 and an explosion-proof valve 12 to realize the exhaust function and electrical connection function of the cover plate structure described below. Figure 4 and Figure 6 As shown in the figure, an example of a cover body 10 having two pole posts 11 is illustrated to accommodate most bipolar pole post 11 cover structure. Figure 4 and Figure 6 As shown, on the third-direction F3, the explosion-proof valve 12 is located between the two pole posts 11.

[0034] Correspondingly, such as Figure 2 As shown, the above-mentioned insulating isolation section 21 may include a first isolation zone 212, a first exhaust zone 211 and a second isolation zone 213 arranged sequentially along the third direction F3, so as to correspond to the first of the two pole posts 11, the explosion-proof valve 12 and the second of the two pole posts 11 arranged on the cover plate body 10, respectively.

[0035] Preferably, such as Figure 2 As shown, the first isolation zone 212 is provided with a first clearance hole, and at least a portion of the first of the two pole posts 11 provided on the cover plate body 10 can be exposed by the first clearance hole, so that the electrode tab 31 led out from the pole group 3 can be electrically connected to the first of the two pole posts 11. Correspondingly, as Figure 2 As shown, the second isolation zone 213 is provided with a second clearance hole, and at least a portion of the second of the two pole posts 11 provided on the cover plate body 10 can be exposed by the second clearance hole so that the other pole tab 31 led out from the pole group 3 can be electrically connected to the second of the two pole posts 11.

[0036] Preferably, such as Figure 2As shown, the first exhaust zone 211 is provided with a first exhaust hole 2111 that penetrates the first exhaust zone 211 along the first direction F1.

[0037] Similarly, such as Figure 2 As shown, the above-mentioned insulating support 22 may also include a first support area 222, a second venting area 221, and a second support area 223 arranged sequentially along the third direction F3. In this way, when the cover plate insulating part 2 is in the assembled state, the second venting area 221, the first venting area 211, and the explosion-proof valve 12 are arranged directly opposite each other along the first direction F1 to ensure the smooth venting of the battery. The first support area 222 can support the tab 31 connected to the first of the two pole posts 11, and the second support area 223 can support the tab 31 connected to the second of the two pole posts 11.

[0038] Preferably, such as Figure 2 As shown, the second exhaust zone 221 is provided with a second exhaust hole 2211 that extends through the second exhaust zone 221 along the first direction F1.

[0039] Preferably, such as Figure 1 and Figure 2 As shown, taking the first snap-fit ​​member 241 in the figure as an example, the first snap-fit ​​member 241 is provided on both sides of the first exhaust area 211 in the third direction F3. Correspondingly, the second snap-fit ​​member 242 is provided at the corresponding position on both sides of the second exhaust area 221 in the third direction F3. This adds anchor points for the insulation isolation part 21 and the insulation support part 22 in the exhaust area of ​​the cover plate body 10, so as to ensure that the airflow impact will not cause the insulation isolation part 21 and the insulation support part 22 to misalign or separate during the exhaust process, thereby further improving the structural stability of the cover plate insulation part 2.

[0040] In practice, preferably, such as Figure 7 As shown, the first locking member 241 can be a first variable-diameter locking hole extending along the first direction F1, and the second locking member 242 can be an elastic locking post extending along the first direction F1. In the first direction F1, from the end facing the second member to the other end, the diameter of the first variable-diameter locking hole gradually decreases. The end of the elastic locking post furthest from the second member is provided with a locking flange 2421, and the outer diameter of the locking flange 2421 is larger than the minimum diameter of the first variable-diameter locking hole. Thus, the elastic locking post can elastically deform the locking flange 2421, whose outer diameter is larger than the minimum diameter of the first variable-diameter locking hole, into the first variable-diameter locking hole. After reaching its position, the locking flange 2421 forms an interference fit with the minimum diameter portion, providing a self-holding force to ensure the locking stability of the locking assembly 24.

[0041] by Figures 1 to 7Taking the example of the insulating isolation part 21 as the first component and the insulating support part 22 as the second component, preferably, the first variable diameter locking hole penetrates the insulating isolation part 21, and a second variable diameter locking hole is also provided at the corresponding position of the cover plate body 10. The elastic locking post can penetrate the first variable diameter locking hole and the second variable diameter locking hole to engage. In this way, on the one hand, the engagement between the elastic locking post and the cover plate body 10 further improves the positioning accuracy of the insulating support part 22 in the first direction F1, thereby ensuring the support accuracy of the pole group 3; on the other hand, it effectively improves the connection stability between the cover plate insulating part 2 and the cover plate body 10. In addition, the locking protrusion 2421, whose outer diameter is larger than the minimum value of the hole diameter of the first variable diameter locking hole, penetrates the first variable diameter locking hole and the second variable diameter locking hole to engage. In this way, the elastic locking post forms a two-stage engagement with both the cover plate body 10 and the insulating isolation part 21, further reducing the risk of the elastic locking post becoming loose.

[0042] Preferably, such as Figure 7 As shown, the aforementioned elastic locking post includes a post body 2420 extending along the first direction F1, and the aforementioned locking protrusion 2421 may be disposed on the outer edge of one end of the post body 2420 in the first direction F1. The aforementioned column body 2420 has a deformation notch 2422 at one end of the engagement flange 2421. The deformation notch 2422 extends from the end of the engagement flange 2421 of the column body 2420 along a first direction F1 to the other end, and the deformation notch 2422 penetrates the column body 2420 in any direction on a plane perpendicular to the first direction F1 (the figure shows an example of the deformation notch 2422 penetrating the column body 2420 along a second direction F2, but it is not limited to this, the direction in which the deformation notch 2422 penetrates the column body 2420 can also be along a third direction F3 or along other directions on the plane), so as to divide the end of the engagement flange 2421 of the column body 2420 into two opposing parts, thereby increasing the elastic deformation space of the engagement flange 2421, so as to further facilitate the assembly of the elastic locking post with the first variable diameter hole and the second variable diameter hole.

[0043] Preferably, such as Figure 7 As shown, the second variable diameter hole includes an insertion portion and a receiving portion connected sequentially along the first direction F1. The diameter of the insertion portion matches the outer diameter of the body 2420 of the elastic locking pin, and the diameter of the receiving portion matches the outer diameter of the locking protrusion 2421, so as to take into account both the locking stability and locking accuracy between the elastic locking pins.

[0044] In an embodiment, preferably, such as Figures 1 to 3As shown, the insulating isolation part 21, the insulating support part 22, and the bending connection part 23 are integrated flexible injection molded parts. This integrated flexible structure ensures the continuity of the connection between components, guaranteeing the connection stability of the cover plate insulating part 2. Furthermore, the manufacturing of the insulating isolation part 21, the insulating support part 22, and the bending connection part 23 can be completed in a single mold opening, effectively reducing mold opening costs, improving production efficiency, and facilitating the mass production of the cover plate insulating part 2.

[0045] Preferably, such as Figures 1 to 3 As shown, the thickness of the bent connection portion 23 is less than the thickness of the insulating isolation portion 21, and the thickness of the bent connection portion 23 is less than the thickness of the insulating support portion 22. Thus, the thinning design of the bent connection portion 23 provides flexible bending performance, facilitates bending and shaping during assembly, adapts to the internal space layout of the battery, and avoids stress concentration that may occur with rigid connections.

[0046] Alternatively, the aforementioned bending connection 23 can also be a hinge to facilitate the bending function of the bending connection 23.

[0047] See Figures 1 to 7 As shown, an embodiment of the second aspect of this application also provides a cover plate structure, including the cover plate body 10 and the cover plate insulating member 2 described in any of the above embodiments, and thus has all the beneficial technical effects of the cover plate insulating member 2, which will not be repeated here.

[0048] Correspondingly, such as Figures 1 to 4 As shown, the cover plate structure also includes an explosion-proof valve 12 and a pole post 11 disposed on the cover plate body 10.

[0049] Correspondingly, such as Figures 1 to 3 As shown, the insulating isolation part 21 is provided with a clearance hole, at least a portion of the pole post 11 is exposed by the clearance hole so as to facilitate the connection between the tab 31 and the pole post 11.

[0050] Preferably, such as Figures 1 to 3 As shown, the insulating isolation part 21 is provided with a first vent 2111, and the insulating support part 22 is provided with a second vent 2211. The first vent 2111, the second vent 2211 and the explosion-proof valve 12 are arranged facing each other along the first direction F1 so that the gas inside the battery can be discharged smoothly.

[0051] It should be noted that the arrangement relationship between the cover plate body 10, the pole post 11 and the explosion-proof valve 12, as well as the assembly correspondence between the three and the aforementioned cover plate insulating component 2, has been described above and will not be repeated here.

[0052] Preferably, such as Figures 5 to 7As shown, the above-mentioned cover plate structure may also include an insulating ring 14, which may be disposed on the side of the cover plate body 10 opposite to the electrode group 3, and the insulating ring 14 may extend between the pole post 11 and the cover plate body 10 to achieve insulation between the side of the cover plate body 10 opposite to the electrode group 3 and the pole post 11.

[0053] Preferably, such as Figures 5 to 7 As shown, the above-mentioned cover plate structure may also include an insulating sleeve 13, which can be sleeved on the outside of the pole post 11 and can be inserted into the cover plate body 10 along with the pole post 11. The two ends of the insulating sleeve 13 in the first direction F1 respectively abut against the above-mentioned cover plate insulating member 2 and insulating ring 14 to ensure the complete insulation between the cover plate body 10 and the pole post 11.

[0054] See Figure 1 , Figure 2 and Figures 5 to 7 As shown, an embodiment of the third aspect of this application also provides a battery, including the above-described electrode group 3, the cover plate insulator 2 described in any of the above embodiments, or the cover plate structure described in any of the above embodiments. Therefore, it has all the beneficial technical effects of the cover plate insulator 2 and the cover plate structure, which will not be repeated here.

[0055] 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 plate insulating component, characterized in that, The cover plate insulation is used for insulation between the battery cover body and the electrode assembly, and the cover plate insulation includes an insulation isolation part, an insulation support part, and a bending connection part; The insulating isolation part and the insulating support part are stacked together along the first direction, and the bent connection part is disposed on one side of the insulating isolation part and the insulating support part in the second direction. The two ends of the bent connection part are respectively connected to the insulating support part and the insulating isolation part. The second direction is perpendicular to the first direction. The insulating isolation part is used to fit against the side of the cover plate body facing the electrode group. The insulating support part is disposed between the electrode group and the electrode tab of the electrode group. The insulating support part is used to support the electrode group, bear the weight of the electrode group, and prevent the electrode group from pressing the electrode tab due to the weight of the electrode group. The electrode tab can extend from the other side of the insulating isolation part and the insulating support part in the second direction and be electrically connected to the electrode post disposed on the cover plate body. It also includes a snap-fit ​​assembly, which includes a first snap-fit ​​member and a second snap-fit ​​member. The first snap-fit ​​member is provided on the first of the insulating isolation part and the insulating support part, and the second snap-fit ​​member is provided at the corresponding position of the second of the insulating isolation part and the insulating support part. The first snap-fit ​​member and the second snap-fit ​​member can snap together to fix the insulating isolation part and the insulating support part; The first snap-fit ​​component is a first variable-diameter snap-fit ​​hole extending along the first direction, and the second snap-fit ​​component is an elastic snap-fit ​​post extending along the first direction; In the first direction, from one end of the first object facing the second object to the other end, the diameter of the first variable diameter card hole gradually decreases; The end of the elastic locking post furthest from the second is provided with a locking protrusion, and the outer diameter of the locking protrusion is greater than the minimum value of the diameter of the first variable diameter locking hole. The elastic locking post includes a post body, and one end of the post body with a locking protrusion is provided with a deformation notch, which divides the end of the post body into two opposing parts. The first variable diameter locking hole penetrates the insulating isolation part, and a second variable diameter locking hole is also provided at the corresponding position of the cover plate body. The elastic locking post can penetrate the first variable diameter locking hole and engage with the second variable diameter locking hole. The first is the insulating isolation part, and the second is the insulating support part; The first variable diameter locking hole penetrates the insulating isolation part, and a second variable diameter locking hole is also provided at the corresponding position of the cover plate body. The elastic locking post can penetrate the first variable diameter locking hole and engage with the second variable diameter locking hole.

2. The cover plate insulating component according to claim 1, characterized in that, The number of the snap-fit ​​components is multiple, and the multiple snap-fit ​​components are divided into multiple columns of connection structures. Each column of connection structure includes at least two snap-fit ​​components. The at least two snap-fit ​​components in the same column are spaced apart along the second direction. The multiple columns of connection structures are spaced apart along a third direction. The third direction is perpendicular to the second direction, and the first direction is perpendicular to the plane determined by the second direction and the third direction.

3. The cover plate insulating component according to claim 2, characterized in that, The cover plate insulating component has the connecting structure at both ends in the third direction.

4. The cover plate insulation component according to any one of claims 1 to 3, characterized in that, The insulating isolation part, the insulating support part, and the bending connection part are integrated into a flexible injection molded part. The thickness of the bending connection part is less than the thickness of the insulating isolation part, and the thickness of the bending connection part is less than the thickness of the insulating support part. Alternatively, the bent connection may be a hinge.

5. A cover plate structure, characterized in that, It includes the cover plate body and the cover plate insulation element according to any one of claims 1 to 4.

6. The cover plate structure according to claim 5, characterized in that, The cover plate structure also includes an explosion-proof valve and a pole disposed on the cover plate body; The insulating isolation part is provided with a clearance hole, and at least a portion of the pole post is exposed by the clearance hole; The insulating isolation part is provided with a first vent hole, and the insulating support part is provided with a second vent hole. The first vent hole, the second vent hole, and the explosion-proof valve are arranged facing each other along the first direction.

7. A battery, characterized in that, Includes the electrode assembly and the cover plate insulation element according to any one of claims 1 to 4; Alternatively, it may include the electrode assembly and the cover plate structure as described in claim 5 or 6.

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