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 battery includes a cover plate and an electrode assembly, arranged sequentially. The cover plate insulator includes an insulating portion and a spacer portion connected to each other. The insulating portion is attached to the side of the cover plate facing the electrode assembly. The spacer portion is disposed between the insulating portion and the electrode assembly, allowing the electrode tabs of the electrode assembly to bypass the spacer portion and connect to the cover plate. The spacer portion includes a spacer body and an elastic support assembly. The elastic support assembly supports the electrode assembly and includes an elastic connector and a support member. The spacer body has a mounting window, and the support member is disposed within the mounting window for contact with the electrode assembly. The elastic connector connects the spacer body and the support member, allowing the support member to elastically shift. The cover plate insulator and battery provided in this application solve the problem of electrode assembly settling and causing short circuits in the electrode tabs in bottom-venting schemes, improving the safety and stability of the battery structure.

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 development of new energy vehicles and various energy storage devices, battery safety has always been a core focus of the industry. Currently, when mainstream battery packs are assembled into modules or packs, the arrangement of their terminals and explosion-proof valves generally adopts a top-mounted design, meaning both are located above the battery. While this traditional arrangement offers certain conveniences in assembly processes and structural design, it poses significant risks to battery safety: when the battery experiences thermal runaway, the explosion-proof valve opens, and high-temperature flames and toxic gases are directly sprayed into the passenger compartment, easily causing personal injury and property damage.

[0003] To address these issues, a bottom-venting design was proposed, which involves placing the explosion-proof valve below the battery to direct the venting away from the passenger compartment. However, this design faces new technical challenges: in a bottom-venting layout, the electrode tabs are located below the direction of gravity of the electrode assembly, while existing battery structures lack effective support and restraint structures between the cover and the electrode assembly. On one hand, the electrode assembly will settle under its own weight over a long period, and the lack of buffering during this settling process makes it difficult to control the amount of settling; on the other hand, when the electrode assembly settles, the lack of physical obstruction allows the electrode tabs to easily penetrate into the electrode assembly, potentially causing an internal short circuit. Furthermore, the insulation reliability between the cover and the electrode assembly needs to be further ensured to avoid safety issues caused by insulation failure. Utility Model Content

[0004] The purpose of this application is to provide a cover plate insulator and a battery to solve, to a certain extent, the technical problems existing in the prior art, such as the electrode assembly settling under its own gravity over a long period of time, the lack of buffering in the settling process making it difficult to control the amount of settling, and the lack of physical obstruction of the electrode tabs when the electrode assembly settles, which can easily lead to the electrode assembly inserting into the interior of the electrode assembly and causing the risk of internal short circuit.

[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, the cover plate insulator, and the electrode assembly being arranged sequentially along a first direction, the cover plate insulator including an insulating portion and a partition portion connected to each other, the insulating portion being used to attach to the side of the cover plate facing the electrode assembly, the partition portion being disposed between the insulating portion and the electrode assembly, and the electrode tabs of the electrode assembly being able to bypass the partition portion and connect to the cover plate; The partition includes a partition body and an elastic support assembly. The elastic support assembly is used to support the pole group. The elastic support assembly includes an elastic connector and a support member. The partition body is provided with a placement window. The support member is disposed in the placement window and is used to abut against the pole group. The elastic connector connects the partition body and the support member so that the support member can elastically move within a predetermined range.

[0006] Preferably, it further includes a flexible connecting portion, which connects the insulating portion and the partition portion; The flexible connection portion is disposed on one side of the cover plate insulator in the second direction, and the electrode extends from the other side of the cover plate insulator in the second direction between the insulation portion and the partition portion, wherein the second direction is perpendicular to the first direction.

[0007] Preferably, the partition body, the elastic connector, and the support are integrated into a single connector. The elastic connector is an elastic rib that is recessed from the support member toward the side where the cover plate is located.

[0008] Preferably, the support extends along a third direction, and there are two elastic ribs. The two ends of the support in the third direction are respectively connected to the partition body via the two elastic ribs, and the third direction is perpendicular to the first direction.

[0009] Preferably, the elastic rib extends along a second direction, and the elastic rib is provided with an elastic notch that penetrates the elastic rib along the second direction. The elastic notch is formed open on the side of the partition facing the pole group. The second direction is perpendicular to the third direction, and the first direction is perpendicular to the plane determined by the second direction and the third direction.

[0010] Preferably, the partition portion is further provided with a strip-shaped hole that penetrates the partition portion along the first direction, and the strip-shaped hole extends from the partition body to the middle of the elastic rib along the third direction; Each of the elastic ribs is provided with a plurality of strip holes, and the plurality of strip holes are spaced apart along the second direction.

[0011] Preferably, the cover plate insulation member is provided with a plurality of elastic support components, and the plurality of elastic support components are spaced apart along the extension direction of the cover plate insulation member.

[0012] Preferably, the partition body includes a first partition component and a second partition component that are spaced apart along the first direction and connected to each other, wherein the elastic support assembly is disposed on the first partition component, and the second partition component abuts against the cover plate.

[0013] Preferably, it further includes a first docking portion and a second docking portion, the first docking portion being disposed on the insulating portion, and the second docking portion being disposed on the partition portion at a position opposite to the first docking portion, and the first docking portion and the second docking portion being detachably connected.

[0014] According to a second aspect of this application, a battery is provided, comprising the aforementioned cover plate, the aforementioned electrode assembly, and the cover plate insulating member described in any of the aforementioned technical solutions, thus possessing all the beneficial technical effects of the cover plate insulating member, which will not be elaborated 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, on the one hand, uses an insulating part for attaching to the side of the cover plate facing the electrode assembly. Through the physical isolation effect of the insulating part, it can effectively block the electrical connection path between the cover plate and the electrode assembly, ensuring the insulation performance between the two. A partition part is disposed between the insulating part and the electrode assembly, and the electrode lugs of the electrode assembly can bypass the partition part and connect to the pole post on the cover plate. The partition body of the partition part forms a direct physical barrier to the electrode lugs, restricting their range of motion. When the electrode assembly settles, the partition body can prevent the electrode lugs from shifting inward with the electrode assembly, avoiding direct insertion of the electrode lugs into the electrode assembly, thus cutting off the path of short circuit caused by electrode lug insertion from a spatial layout perspective. On the other hand, the elastic support component of the partition part is configured to include an elastic connector and a support member. The support member is disposed within the placement window of the partition body and abuts against the electrode assembly, and the elastic connector connects the partition body and the support member. When the electrode assembly settles due to its own weight, the support component is stressed synchronously with the electrode assembly. The elastic connector provides elastic support through its own deformation, buffering the settlement of the electrode assembly and effectively reducing the amount and speed of settlement, thus preventing excessive displacement caused by rigid settlement. The elastic connector allows the support component to elastically shift within a predetermined range. When the electrode assembly experiences slight displacement due to vibration, temperature changes, or other factors, the support component can adapt to the slight movement of the electrode assembly through elastic shifting, avoiding structural damage caused by stress concentration due to rigid contact between the support structure and the electrode assembly. At the same time, it ensures that the support component always maintains effective contact with the electrode assembly, maintaining stable support for the electrode assembly and further reducing the risk of abnormal electrode tab position caused by electrode assembly shaking. In this way, the cover plate insulation component, through the synergistic effect of ensuring basic insulation through insulation, physically blocking the electrode tab path through the partition body, and buffering settlement and adapting to slight movements through the elastic support component, specifically solves the core problem of electrode assembly settlement causing short circuits in the electrode tab insertion in the bottom exhaust scheme, while improving the overall safety and stability 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 1 A schematic diagram of the battery in its unfolded state, provided in an embodiment of this application. Figure 2 A schematic diagram of the cover plate structure provided in the embodiment of this application in its unfolded state; Figure 3 Another isometric structural schematic diagram of the cover plate structure provided in the embodiment of this application in the unfolded state; Figure 4 A front view of the cover plate structure provided in the embodiment of this application in its unfolded state; Figure 5 A schematic diagram of the cross-sectional structure of a battery provided in this application embodiment, obtained by cutting along a plane determined by both a first direction and a third direction; Figure 6 A schematic diagram of the cross-sectional structure obtained by cutting the battery along a plane determined by both the first direction and the second direction, as provided in the embodiments of this application.

[0019] Figure label: 11-Insulation part; 12-Blocking part; 121-Elastic support assembly; 1211-Support member; 1212-Elastic rib; 1213-Elastic notch; 1214-Strip hole; 122-Blocking body; 1221-First blocking component; 1222-Second blocking component; 1223-Transition connection component; 13-Flexible connection part; 141-Second mating part; 142-First mating part; 20-Cover plate body; 21-Pole post; 22-Explosion-proof valve; 30-Pole group; 31-Pole tab; 4-Housing.

[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 6As 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 30. The cover plate, the cover plate insulator, and the electrode assembly 30 are arranged sequentially along a first direction F1. The cover plate insulator includes an insulating portion 11 and a partition portion 12 connected to each other. The insulating portion 11 is attached to the side of the cover plate facing the electrode assembly 30. The partition portion 12 is disposed between the insulating portion 11 and the electrode assembly 30. The electrode tabs 31 of the electrode assembly 30 can bypass the partition portion 12 and connect to the cover plate. The partition portion 12 includes a partition body 122 and an elastic support assembly 121. The elastic support assembly 121 is used to support the electrode assembly 30. The elastic support assembly 121 includes an elastic connector and a support member 1211. The partition body 122 is provided with a mounting window. The support member 1211 is disposed in the mounting window and is used to abut against the electrode assembly 30. The elastic connector connects the partition body 122 and the support member 1211 so that the support member 1211 can elastically shift within a predetermined range.

[0028] According to the above-mentioned technical features, the cover plate insulating component has an insulating part 11 that is attached to the side of the cover plate facing the electrode group 30. Through the physical isolation effect of the insulating part 11, the electrical connection path between the cover plate and the electrode group 30 can be effectively blocked, ensuring the insulation performance between the two. Furthermore, the partition part 12 is provided between the insulating part 11 and the electrode group 30, and the electrode tab 31 of the electrode group 30 can bypass the partition part 12 and connect to the electrode post 21 on the cover plate. The partition body 122 of the partition 12 forms a direct physical barrier to the electrode tab 31, restricting the range of motion of the electrode tab 31. When the electrode assembly 30 settles, the partition body 122 can prevent the electrode tab 31 from shifting inward with the electrode assembly 30, thus preventing the electrode tab 31 from directly inserting into the electrode assembly 30 and cutting off the path of short circuit caused by the insertion of the electrode tab 31 from a spatial layout perspective. On the other hand, by setting the elastic support component 121 of the partition 12 to include an elastic connector and a support member 1211, the support member 1211 is set in the placement window of the partition body 122 and abuts against the electrode assembly 30, and the elastic connector connects the partition body 122 and the support member 1211. When the pole assembly 30 settles due to its own weight, the support member 1211 will be subjected to force synchronously with the pole assembly 30. The elastic connector provides elastic support force through its own deformation, providing a buffer for the settlement of the pole assembly 30, effectively reducing the amount and speed of settlement of the pole assembly 30, and avoiding excessive displacement of the pole assembly 30 due to rigid settlement. The elastic connector allows the support member 1211 to elastically shift within a predetermined range. When the pole assembly 30 undergoes slight displacement due to factors such as vibration and temperature changes, the support member 1211 can adapt to the slight movement requirements of the pole assembly 30 through elastic shifting, avoiding structural damage caused by stress concentration due to rigid contact between the support structure and the pole assembly 30. At the same time, it ensures that the support member 1211 always maintains effective contact with the pole assembly 30, maintaining stable support for the pole assembly 30, and further reducing the risk of abnormal position of the pole tab 31 caused by the swaying of the pole assembly 30. In this way, the cover plate insulation component ensures basic insulation through the insulation part 11, physically blocks the path of the tab 31 through the partition body 122, and the elastic support component 121 buffers the settlement and adapts to the micro-movement. This effectively solves the core problem of the tab 31 being short-circuited due to the settlement of the electrode group 30 in the bottom exhaust scheme, while improving the overall safety and stability of the battery structure.

[0029] like Figure 5 and Figure 6 As shown in the figure, F1 can be an example of the first direction F1 described above. For ease of description, as... Figures 1 to 6As shown, the two directions that intersect each other on the plane intersecting the first direction F1 are defined as the second direction F2 and the third direction F3. F2 shown in the figure can be an example of the second direction F2, and F3 shown in the figure can be an example of the third direction F3. Preferably, the first direction F1 is perpendicular to the plane defined by both the second direction F2 and the third direction F3 to accommodate most regular-shaped batteries (e.g., prismatic batteries, cylindrical batteries, etc.). Preferably, the second direction F2 can be perpendicular to the third direction F3 to accommodate most prismatic batteries. The first direction F1 can be the length direction of the prismatic battery, the second direction F2 can be the thickness direction of the prismatic battery, and the third direction F3 can be the width direction of the prismatic battery. When the prismatic battery is in use, the first direction F1 can be parallel to the direction of gravity, and the cover plate insulator can be located below the direction of gravity of the battery electrode assembly 30 to facilitate the application of the aforementioned bottom venting scheme.

[0030] It should be noted that the first direction F1 refers to the relative positional relationship between the components when the aforementioned cover insulation is assembled inside the battery (i.e., the cover insulation is in a folded state). Figures 1 to 4 The diagram shows the structure with the cover plate insulation in the unfolded state, therefore the first direction F1 is not marked in the figure.

[0031] Preferably, such as Figures 1 to 4 and Figure 6 As shown, the above-mentioned cover plate insulation component may include a flexible connecting part 13, which can connect the insulation part 11 and the partition part 12. On the one hand, by connecting the insulation part 11 and the partition part 12 into one unit through the flexible connecting part 13, the assembly efficiency can be effectively improved and the process of matching and docking the insulation part 11 and the partition part 12 during the assembly process can be saved. On the other hand, it ensures the relative positional accuracy of the insulation part 11 and the partition part 12.

[0032] Preferably, such as Figures 1 to 4 and Figure 6 As shown, the flexible connecting portion 13 can be disposed on one side of the cover plate insulator in the second direction F2, and the tab 31 extends from the other side of the cover plate insulator in the second direction F2 between the insulating portion 11 and the partition portion 12. Thus, on the one hand, by connecting the flexible connecting portion 13 to one side of the cover plate insulator in the second direction F2, the cover plate insulator can utilize the flexible deformation of the flexible connecting portion 13 to allow the insulating portion 11 and the partition portion 12 to unfold relative to each other (i.e., Figures 1 to 4 The state shown) and fold (i.e. Figure 5 and Figure 6(as shown in the diagram) to facilitate the assembly of the cover plate insulator with other battery components and the maintenance of each battery component; on the other hand, by utilizing the flexible connection portion 13 of the cover plate insulator to pass through the tab 31 on the opposite side, it is possible to ensure the space for the tab 31 to pass through and the space for the tab 31 to be installed, while effectively avoiding interference between the flexible connection portion 13 and the tab 31.

[0033] Preferably, the flexible connecting portion 13 can be a flexible strip, one end of which is attached to the insulating portion 11 and the other end of which is attached to the partition portion 12, so that the insulating portion 11 and the partition portion 12 can be unfolded relative to each other through the foldability of the flexible strip (i.e., Figures 1 to 4 The state shown) and fold (i.e. Figure 5 and Figure 6 (The state shown). However, it is not limited to this. As long as the foldability of both the insulating part 11 and the partition part 12 can be achieved, the flexible connecting part 13 is not limited to the form of the flexible strip, such as a flexible strip, elastic strip, etc.

[0034] Preferably, the insulating part 11, the partition part 12 and the flexible connection part 13 can be an integral injection molded part, so that the cover plate insulation part can be manufactured and formed in one injection molding, which can effectively improve manufacturing efficiency, reduce manufacturing costs and facilitate the mass production of cover plate insulation parts.

[0035] Preferably, such as Figures 1 to 4 As shown in the figure, an example of two flexible connecting parts 13 is illustrated. The two flexible connecting parts 13 are spaced apart along the third direction F3 of the cover plate insulation to ensure the connection stability between the insulation part 11 and the partition part 12. It should be noted that the number of flexible connecting parts 13 can be adaptively adjusted according to the dimensions of the cover plate in the third direction F3. For example, the number of flexible connecting parts 13 can also be one, three, four, or more.

[0036] In an embodiment, such as Figures 1 to 4 As shown, the partition body 122, the elastic connector and the support 1211 are integrated into one connector, which not only ensures the consistency of mechanical properties at the connection position of the partition body 122, the elastic connector and the support 1211, and avoids support failure due to breakage at weak connection points, effectively improving the connection stability of the partition part 12, but also reduces assembly steps and saves manufacturing efficiency and cost of the partition part 12.

[0037] However, it is not limited to this. As long as the pole group 30 can be elastically supported within a predetermined range, the above-mentioned partition body 122, elastic connector and support member 1211 can also be an assembly structure. For example, the elastic connector can be an elastic wire (elastic band, spring, elastic rib, etc.) connecting the partition body 122 and the support member 1211.

[0038] Preferably, such as Figures 1 to 4 The figure shows that the above-mentioned elastic connector is an elastic rib 1212 that is recessed from the support member 1211 toward the side where the cover plate is located. The recessed structure formed by the elastic rib 1212 can pre-form a deformation space. When the pole group 30 settles and presses the support member 1211, the elastic rib 1212 can undergo controllable elastic deformation along the recessed direction. Through the bending rebound of its own structure, it provides a stable buffer support force, effectively enhancing the adaptability of the elastic support assembly 121 to the settlement of the pole group 30 and avoiding stress concentration caused by rigid support.

[0039] Preferably, such as Figures 1 to 5 As shown, the support member 1211 extends along the third direction F3, and there are two elastic ribs 1212. The two ends of the support member 1211 along the third direction F3 are connected to the partition body 122 via the two elastic ribs 1212, thus forming a symmetrical "two-end support" structure at both ends of the support member 1211 along the third direction F3. This structure allows the support member 1211 to bear force evenly during the settlement of the electrode assembly 30, preventing tilting or displacement of the support member 1211 due to unilateral force, and ensuring smooth settlement of the electrode assembly 30 along the first direction F1. The two elastic ribs 1212 respectively bear the force at both ends of the support member 1211, which can disperse the load generated by the gravity of the electrode assembly 30, reduce the deformation pressure of a single elastic connector, extend the service life of the elastic support assembly 121, and improve the stable support effect on the electrode assembly 30, further reducing the risk of misalignment of the electrode tab 31 caused by the tilt of the electrode assembly 30.

[0040] Preferably, such as Figure 3 and Figure 5 As shown, the aforementioned elastic rib 1212 extends along the second direction F2. The elastic rib 1212 is provided with an elastic notch 1213 that penetrates the elastic rib 1212 along the second direction F2. The elastic notch 1213 is open on the side of the partition portion 12 facing the pole group 30. In this way, the open elastic notch 1213 can greatly improve the deformation freedom of the elastic rib 1212. When the support member 1211 is subjected to pressure from the pole group 30, the elastic rib 1212 can undergo a greater bending deformation along the notch direction, enhancing the buffering effect. At the same time, the open design avoids the internal stress accumulation caused by the notch being closed during deformation, reducing fatigue damage to the elastic rib 1212 caused by repeated deformation.

[0041] Preferably, such as Figures 1 to 4As shown, the aforementioned partition 12 is also provided with a strip-shaped hole 1214 extending through the partition 12 along the first direction F1. The strip-shaped hole 1214 extends from the partition body 122 to the middle of the elastic rib 1212 along the third direction F3. In this way, the strip-shaped hole 1214 can effectively reduce deformation resistance, making it easier for the elastic rib 1212 to undergo elastic deformation when the pole group 30 settles, thereby improving the sensitivity to settlement force and the buffer response speed. The strip-shaped hole 1214 extending to the middle along the third direction F3 can guide the deformation path of the elastic rib 1212, ensuring that the deformation is concentrated in the effective support area.

[0042] Preferably, such as Figures 1 to 4 As shown, each elastic rib 1212 is provided with multiple strip holes 1214, which are spaced apart along the second direction F2. This further reduces the deformation resistance, making the elastic rib 1212 more prone to elastic deformation when the pole group 30 settles, thereby improving the sensitivity to settlement force and buffer response speed. The multiple spaced strip holes 1214 can disperse stress and avoid structural weak points caused by a single gap. While improving elasticity, the structural strength of the elastic rib 1212 is maintained, and its fatigue life is extended.

[0043] Preferably, such as Figures 1 to 5 As shown in the figure, an example of a cover plate insulator with two elastic support components 121 is illustrated. The two elastic support components 121 are spaced apart along the extension direction of the cover plate insulator (i.e., the third direction F3). However, this is not the only possibility. As long as stable support for the electrode assembly 30 can be guaranteed, the number of the above-mentioned elastic support components 121 can be multiple (i.e., 3, 4, 5 or more) to distribute the gravity load of the electrode assembly 30 to multiple support points, avoiding excessive deformation or failure of a single support component due to excessive force. The spaced distribution design can adapt to the settlement requirements of different areas of the electrode assembly 30, ensuring that the electrode assembly 30 is subjected to uniform force as a whole, and reducing the tilting or twisting of the electrode assembly 30 caused by excessive local settlement. At the same time, multiple elastic support components 121 form a multi-point collaborative support system. Even if individual components experience performance degradation due to long-term use, other components can still maintain the overall support effect, improving the redundancy safety and service life of the cover plate insulator, and further reducing the risk of electrode tab 31 insertion caused by the settlement of the electrode assembly 30.

[0044] In an embodiment, such as Figures 1 to 4 and Figure 6As shown, the aforementioned partition body 122 may include a first partition component 1221 and a second partition component 1222 that are spaced apart and connected to each other along the first direction F1. The elastic support component 121 is disposed on the first partition component 1221, and the second partition component 1222 abuts against the cover plate. Thus, on the one hand, the first partition component 1221 and the second partition component 1222 are spaced apart along the first direction F1, providing space for the elastic support component 121 to move in the first direction F1; on the other hand, the layered support structure formed by the first partition component 1221 and the second partition component 1222 achieves the separation of the forces between the pole group 30 and the cover plate. The first partition component 1221 directly bears the gravity and sinking force of the pole group 30, while the second partition component 1222 can distribute the force to the cover plate, thereby improving the load-bearing capacity of the overall structure.

[0045] Preferably, such as Figures 1 to 4 and Figure 6 As shown, the aforementioned partition body 122 may further include a transition connection component 1223, which can connect the first partition component 1221 and the second partition component 1222. Thus, through the connection of the transition connection component 1223, the stress concentration at the connection between the first partition component 1221 and the second partition component 1222 can be effectively alleviated, reducing the probability of breakage at the connection between the first partition component 1221 and the second partition component 1222.

[0046] Preferably, such as Figures 1 to 4 As shown, the second partition component 1222 can be disposed on both sides of the first partition component 1221 in the second direction F2, so that the partition part 12 and the cover plate can be symmetrically supported by the symmetrically disposed second partition component 1222, ensuring the stability of the partition part 12 in supporting the pole group 30 and the cover plate, and preventing the partition part 12 from shifting or tilting in the second direction F2.

[0047] In an embodiment, such as Figures 1 to 6As shown, the aforementioned cover plate insulation component may further include a first mating portion 142 and a second mating portion 141. The first mating portion 142 is disposed on the insulation portion 11, and the second mating portion 141 is disposed on the partition portion 12 at a position opposite to the first mating portion 142. The first mating portion 142 and the second mating portion 141 can be detachably connected. Thus, by providing the detachably connected first mating portion 142 and the second mating portion 141, the insulation portion 11 and the partition portion 12 are in a folded state. On the one hand, the connection between the first mating portion 142 and the second mating portion can limit the relative position of the insulation portion 11 and the partition portion 12 in the first direction F1, thereby ensuring the dimensional accuracy of the cover plate insulation component assembled in the battery in the first direction F1 and the stability of the cover plate insulation component, preventing gaps caused by vibration during use from affecting the insulation performance and support stability, and further ensuring the safety of the battery structure. On the other hand, the detachability of the first mating portion 142 and the second mating portion 141 allows the cover plate insulation component to switch from a folded state to an unfolded state, facilitating the maintenance of various battery components.

[0048] Optionally, such as Figures 1 to 4 As shown, the first docking part 142 can be a snap-fit ​​hole, and the second docking part 141 can be a snap-fit ​​pin that matches the snap-fit ​​hole. However, it is not limited to this. As long as the first docking part 142 and the second docking part 141 can be detachable, the first docking part 142 and the second docking part 141 can also be other detachable structures, such as snap-fit / slot, male / female snap, etc.

[0049] The second aspect of this application also provides a battery including the above-described cover plate, the above-described electrode group 30, 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.

[0050] Preferably, such as Figure 3 and Figure 5 As shown, the cover plate may include a cover plate body 20, an electrode post 21, and an explosion-proof valve 22, with the electrode post 21 and explosion-proof valve 22 disposed on the cover plate body 20. The electrode tab 31 is electrically connected to the cover plate via the electrode post 21. The insulating part 11 is attached to the side of the cover plate body 20 facing the electrode assembly 30.

[0051] It should be noted that the assembly structure of the pole post 21 and the cover plate body 20 and the assembly structure of the explosion-proof valve 22 and the cover plate body 20 are existing technologies in the field and will not be described in detail here.

[0052] Preferably, such as Figure 5 and Figure 6As shown, at least a portion of the insulating portion 11 extends between the side of the cover plate body 20 facing the electrode group 30 and the pole post 21, so as to achieve insulation between the side of the plate body facing the electrode group 30 and the pole post 21.

[0053] Preferably, the insulating part 11 may be provided with a first vent hole, and the partition part 12 may be provided with a second vent hole. When the cover plate insulating part is assembled in the battery, the first vent hole and the second vent hole are both arranged opposite to the explosion-proof valve 22 along the first direction F1 to ensure the smooth venting of the explosion-proof valve 22.

[0054] Optionally, such as Figure 5 As shown, the battery may also include a housing 4, the electrode assembly 30 is disposed inside the housing 4, and the cover plate is disposed below the housing 4 in the first direction F1.

[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, For use in a battery, the battery includes a cover plate and an electrode assembly, the cover plate, the cover plate insulator and the electrode assembly are arranged sequentially along a first direction, the cover plate insulator includes an insulating part and a partition part connected to each other, the insulating part is used to attach to the side of the cover plate facing the electrode assembly, the partition part is disposed between the insulating part and the electrode assembly, and the electrode tabs of the electrode assembly can bypass the partition part and connect to the cover plate; The partition includes a partition body and an elastic support assembly. The elastic support assembly is used to support the pole group. The elastic support assembly includes an elastic connector and a support member. The partition body is provided with a placement window. The support member is disposed in the placement window and is used to abut against the pole group. The elastic connector connects the partition body and the support member so that the support member can elastically move within a predetermined range.

2. The cover plate insulating component according to claim 1, characterized in that, It also includes a flexible connection portion that connects the insulating portion and the partition portion; The flexible connection portion is disposed on one side of the cover plate insulator in the second direction, and the electrode extends from the other side of the cover plate insulator in the second direction between the insulation portion and the partition portion, wherein the second direction is perpendicular to the first direction.

3. The cover plate insulating component according to claim 1, characterized in that, The partition body, the elastic connector, and the support are integrated into a single connector. The elastic connector is an elastic rib that is recessed from the support member toward the side where the cover plate is located.

4. The cover plate insulating component according to claim 3, characterized in that, The support extends along a third direction, and there are two elastic ribs. The two ends of the support in the third direction are respectively connected to the partition body via the two elastic ribs. The third direction is perpendicular to the first direction.

5. The cover plate insulating component according to claim 4, characterized in that, The elastic rib extends along the second direction and is provided with an elastic notch that penetrates the elastic rib along the second direction. The elastic notch is formed open on the side of the partition facing the pole group. The second direction is perpendicular to the third direction, and the first direction is perpendicular to the plane determined by the second direction and the third direction.

6. The cover plate insulating component according to claim 5, characterized in that, The partition portion is further provided with a strip-shaped hole that penetrates the partition portion along the first direction, and the strip-shaped hole extends from the partition body to the middle of the elastic rib along the third direction. Each of the elastic ribs is provided with a plurality of strip holes, and the plurality of strip holes are spaced apart along the second direction.

7. The cover plate insulating component according to claim 1, characterized in that, The cover plate insulation is provided with a plurality of elastic support components, which are spaced apart along the extension direction of the cover plate insulation.

8. The cover plate insulation element according to any one of claims 1 to 7, characterized in that, The partition body includes a first partition component and a second partition component that are spaced apart along the first direction and connected to each other, wherein the elastic support component is disposed on the first partition component, and the second partition component abuts against the cover plate.

9. The cover plate insulation element according to any one of claims 1 to 7, characterized in that, It also includes a first docking part and a second docking part, the first docking part is disposed on the insulating part, and the second docking part is disposed on the partition part at a position opposite to the first docking part, and the first docking part and the second docking part can be detachably connected.

10. A battery, characterized in that, 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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