Insulating piece, cover plate assembly and battery

Abstract

This application relates to the field of battery technology, and in particular to an insulating component, a cover assembly, and a battery for insulating the cover body and electrode assembly of a battery. The insulating component includes an insulating bonding portion and a spacer portion, with the insulating bonding portion used to bond to the side of the cover body facing the electrode assembly. When the insulating component is assembled inside the battery, the cover body, insulating bonding portion, spacer portion, and electrode assembly are arranged sequentially along a first direction. The electrode tabs of the electrode assembly can bypass the spacer portion and extend between the insulating bonding portion and the spacer portion to connect with the cover body. The insulating component, cover assembly, and battery provided by this application ensure the basic insulation safety of the battery, effectively prevent excessive sinking of the electrode assembly, and avoid the electrode tabs being forcibly pulled into the electrode assembly due to excessive sinking distance. This avoids mechanical damage caused by the electrode tabs being squeezed between the electrode assembly and the spacer portion, and also ensures a stable electrical connection between the electrode tabs and the cover body through the relative position restriction between the spacer portion and the electrode assembly.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an insulating component, a cover assembly, and a battery. Background Technology

[0002] With the rapid development of new energy vehicles, the safety of power batteries has become a core concern. Power batteries may experience thermal runaway during use. To prevent the ejected material from the explosion-proof valve from directly threatening the passenger compartment, the industry has gradually adopted a bottom-venting design (i.e., the explosion-proof valve is located below the battery). However, in this bottom-venting design, the electrode assembly tends to sink downwards due to its own weight, causing the tabs to be carried into the electrode assembly, potentially leading to a short circuit risk.

[0003] Meanwhile, the battery cover plate and the electrode assembly must be kept insulated to prevent leakage or short circuit. Existing insulation structures are mostly simple flat insulating parts, which can only achieve basic insulation and cannot solve the problem of short circuit of the electrode tabs caused by the electrode assembly sinking. Moreover, they are difficult to adapt to the complex wiring path of the electrode tabs in the bottom exhaust scheme. Utility Model Content

[0004] The purpose of this application is to provide an insulating component, a cover plate assembly, and a battery, so as to solve to some extent the technical problems existing in the prior art, which are mostly simple flat insulating components that can only achieve basic insulation, cannot solve the problem of short circuit of the tabs caused by the sinking of the electrode assembly, and are difficult to adapt to the complex wiring path of the tabs in the downward exhaust scheme.

[0005] According to a first aspect of this application, an insulating member is provided for insulation between a cover body of a battery and an electrode assembly. The insulating member includes an insulating bonding portion and a spacer portion, wherein the insulating bonding portion is used to bond to the side of the cover body facing the electrode assembly. When the insulating component is assembled inside the battery, the cover plate body, the insulating bonding part, the partition part, and the electrode group are arranged sequentially along a first direction. The electrode tabs of the electrode group can bypass the partition part and extend between the insulating bonding part and the partition part to connect with the cover plate body.

[0006] Preferably, it further includes a bent connection portion that connects the insulating bonding portion and the partition portion, so that the insulating component can switch between an unfolded state and an assembled state.

[0007] Preferably, the insulating bonding part, the partition part, and the bending connection part are integrated into a single connecting piece.

[0008] Preferably, when the insulating member is in the assembled state, the bent connection portion is disposed on one side of the insulating member in the second direction, and the tab extends from the other side of the insulating member in the second direction between the insulating bonding portion and the partition portion, wherein the second direction is perpendicular to the first direction.

[0009] Preferably, the partition portion has an avoidance notch on the side away from the bent connection portion in the second direction, and the electrode tab extends through the avoidance notch between the insulating bonding portion and the partition portion.

[0010] Preferably, the cover plate body is provided with a pole and an explosion-proof valve; The insulating bonding part is provided with a clearance hole and a first vent hole that penetrate the insulating bonding part; The partition is provided with a support part and an exhaust part, and the exhaust part is provided with a second exhaust hole penetrating the partition; With the insulating component assembled inside the battery, the explosion-proof valve, the first vent, and the second vent are arranged facing each other along the first direction, at least a portion of the pole is exposed by the clearance hole, and the support portion is arranged facing the pole.

[0011] Preferably, the exhaust portion includes a cover plate and a supporting wall, the supporting wall being disposed on the side of the cover plate facing the insulating bonding portion, and the supporting wall being disposed around the edge of the cover plate at least once to support the formation of an air-accommodating space between the insulating bonding portion and the partition portion.

[0012] Preferably, the support portion includes a first support plate and a second support plate connected to each other, the first support plate being used to abut against the electrode assembly, and the second support plate being used to abut against the insulating bonding portion; The first support plate and the cover plate are aligned on the side opposite to the insulating bonding part.

[0013] According to a second aspect of this application, a cover plate assembly is provided, including the insulating element described in any of the above-mentioned technical solutions, and thus possesses all the beneficial technical effects of the insulating element, which will not be repeated here.

[0014] According to a third aspect of this application, a battery is provided, comprising the insulating element described in any of the above technical solutions and / or the cover plate assembly described in any of the above technical solutions, thus possessing all the beneficial technical effects of the insulating element, which will not be repeated here.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The insulating component provided in this application, on the one hand, physically isolates the cover plate body and the electrode assembly, blocking the conductive path between them and preventing leakage and short circuit risks caused by direct contact or conduction through impurities, thus ensuring the basic insulation safety of the battery. On the other hand, by placing the partition between the electrode assembly and the insulating bonding part, the partition can directly bear the pressure of the electrode assembly, forming physical support and effectively preventing the electrode assembly from sinking excessively. This prevents the tab from being forcibly pulled into the electrode assembly due to excessive sinking distance, reducing the risk of short circuits caused by tab insertion at the source. In addition, the presence of the partition provides a clear bypass path for the tab; that is, the tab must bypass the partition and connect to the cover plate body within the space between the insulating bonding part and the partition. This path design not only avoids mechanical damage caused by the tab being squeezed between the electrode assembly and the partition, but also ensures that the tab is always on the outside of the electrode assembly by limiting the relative position of the partition and the electrode assembly, further preventing the tab from being pulled into the electrode assembly when it sinks, while ensuring a stable electrical connection between the tab and the cover plate body.

[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 This is an isometric structural diagram of the insulating component provided in the embodiments of this application; Figure 2 Another isometric structural schematic diagram of the insulating component provided in the embodiments of this application; Figure 3 This is an isometric structural schematic diagram of the cover plate assembly provided in the embodiments of this application; Figure 4 This is a cross-sectional view of the battery provided in an embodiment of this application. Figure 5 for Figure 4 An enlarged structural schematic diagram of the provided insulating component at point A; Figure 6 A schematic diagram of the unfolded structure of a battery provided in an embodiment of this application; Figure 7 This is a partial cross-sectional view of the battery provided in an embodiment of this application.

[0019] Figure label: 11-Insulating bonding part; 111-Allowing hole; 112-First exhaust hole; 113-First snap-fit ​​part; 12-Blocking part; 121-Exhaust part; 1211-Cover plate; 1212-Supporting wall; 1213-Second exhaust hole; 122-Supporting part; 1221-First support plate; 1222-Second support plate; 1223-Transition connector; 1224-Allowing notch; 1225-Supporting end wall; 123-Second snap-fit ​​part; 20-Cover plate body; 13-Bending connection part; 21-Pole post; 22-Explosion-proof valve; 23-Insulating sleeve; 24-Insulating ring; 3-Pole group; 31-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 7 The present application describes an insulating component, a cover plate assembly, and a battery according to some embodiments thereof.

[0027] See Figures 1 to 7 As shown, an embodiment of the first aspect of this application provides an insulating member for insulating the cover body 20 of a battery from the electrode assembly 3. The insulating member includes an insulating fitting portion 11 and a spacer portion 12. The insulating fitting portion 11 is used to fit the side of the cover body 20 facing the electrode assembly 3. When the insulating member is assembled inside the battery, the cover body 20, the insulating fitting portion 11, the spacer portion 12, and the electrode assembly 3 are arranged sequentially along a first direction F1. The electrode tabs 31 of the electrode assembly 3 can bypass the spacer portion 12 and extend between the insulating fitting portion 11 and the spacer portion 12 to connect with the cover body 20.

[0028] According to the insulating component provided by the above technical features, on the one hand, the physical isolation of the insulating material blocks the conductive path between the cover plate body 20 and the electrode group 3, avoiding the risk of leakage and short circuit caused by direct contact between the two or conduction through impurities, and ensuring the basic insulation safety of the battery; on the other hand, the partition part 12 is placed between the electrode group 3 and the insulating bonding part 11, so that the partition part 12 can directly bear the pressure of the electrode group 3, forming a physical support, effectively preventing the electrode group 3 from sinking too much, and preventing the electrode tab 31 from being forcibly brought into the electrode group 3 due to excessive sinking distance, thereby reducing the risk of short circuit caused by the insertion of the electrode tab 31 from the root; in addition, the existence of the partition part 12 provides a clear bypass path for the electrode tab 31, that is, the electrode tab 31 needs to bypass the partition part 12 and connect to the cover plate body 20 in the space between the insulating bonding part 11 and the partition part 12. This path design avoids mechanical damage caused by the tab 31 being squeezed between the pole group 3 and the partition 12. It also ensures that the tab 31 is always on the outside of the pole group 3 by limiting the relative position of the partition 12 and the pole group 3, further preventing the tab 31 from being rolled into the pole group 3 when the pole group 3 sinks. At the same time, it ensures a stable electrical connection between the tab 31 and the cover plate body 20.

[0029] like Figures 1 to 7 As shown in the figure, F1 can be an example of the first direction F1 described above. For ease of description, the two directions that intersect each other on the plane intersecting with the first direction F1 are defined as the second direction F2 and the third direction F3, respectively. F2 shown in the figure can be an example of the second direction F2 described above, and F3 shown in the figure can be an example of the third direction F3 described above. Preferably, as Figures 1 to 7 As shown in the figure, any two of the aforementioned first direction F1, second direction F2, and third direction F3 are perpendicular to each other, to accommodate the structure of most square batteries. Preferably, when the aforementioned insulating component is in the assembled state, the aforementioned first direction F1 can be parallel to the direction of gravity.

[0030] Preferably, such as Figures 1 to 6 As shown, the aforementioned insulating component may further include a bent connecting portion 13, which connects the insulating bonding portion 11 and the partition portion 12, so that the insulating component can switch between an unfolded state and an assembled state. Thus, the bent connecting portion 13 ensures that the insulating component is in an unfolded state before assembly (e.g., Figures 1 to 3 and Figure 6 The example shown (where the insulating component is flat) not only facilitates the transportation, positioning, and pre-processing of the insulating component, but also effectively facilitates the assembly of the insulating component with other battery components; during assembly, it is switched to the assembly state by bending (e.g., Figure 4 , Figure 5 and Figure 7 The example shown is of the insulation component switching to the assembly state, which allows the insulation bonding part 11 and the partition part 12 to quickly form a preset spatial layout (arranged sequentially along the first direction F1), without the need to adjust the relative position of the two components separately, simplifying the assembly process and improving production efficiency.

[0031] Optionally, the aforementioned bent connecting portion 13 can be in the form of a strip, with its two ends connected to the ends of the insulating bonding portion and the partition portion, respectively. The thickness of the bent connecting portion can be less than the thickness of both the insulating bonding portion and the partition portion, thereby facilitating the bending of the insulating component.

[0032] Preferably, such as Figures 1 to 3 As shown, the aforementioned insulating bonding part 11, partition part 12, and bending connection part 13 are integrated as a single connecting piece. In this way, on the one hand, the integral molding can be completed in one process, reducing the number of parts and assembly steps, and lowering production and management costs; at the same time, it avoids performance fluctuations caused by component matching errors and improves the consistency between different insulating parts; on the other hand, it avoids the weak points at the connection points in the spliced ​​design, can more evenly bear the pressure and vibration impact of the pole group 3, reduces the risk of the bending connection part 13 breaking or the partition part 12 falling off, and ensures the stability of insulation and support functions during long-term use.

[0033] Optionally, the aforementioned insulating component may be an integrally injection-molded part.

[0034] Preferably, such as Figure 4 and Figure 5As shown, when the insulating component is in the assembled state, the bent connection portion 13 is located on one side of the insulating component in the second direction F2, and the tab 31 extends from the other side of the insulating component in the second direction F2 into the space between the insulating bonding portion 11 and the partition portion 12. In this way, on the one hand, the bent connection portion 13 and the tab 31 entrance are located on opposite sides of the second direction F2, which provides an independent wiring path for the tab 31, preventing the tab 31 from rubbing or squeezing against the bent connection portion 13 (which may have sharp edges or protrusions) during the detour, reducing the risk of tab 31 damage and ensuring the reliability of electrical connection; on the other hand, the tab 31 can only be inserted from the fixed side, which restricts the range of motion of the tab 31, avoids the tab 31 from contacting other areas of the electrode group 3 due to disordered shaking, and facilitates the management of the internal wiring harness of the battery.

[0035] Preferably, the insulating member can extend along the third direction F3, and the number of the bent connecting portions 13 can be multiple. These multiple bent connecting portions 13 can be spaced apart along the third direction F3 to improve the connection stability between the insulating bonding portion 11 and the partition portion 12. Figures 1 to 3 As shown in the figure, an example is shown where the number of the aforementioned bent connecting parts 13 is two.

[0036] Preferably, such as Figures 1 to 3 As shown, the partition 12 has a clearance notch 1224 on the side away from the bent connection 13 in the second direction F2. The tab 31 extends into the space between the insulating bonding part 11 and the partition 12 through the clearance notch 1224. The clearance notch 1224 provides a clear entrance for the tab 31, which can quickly guide the tab 31 into the space between the insulating bonding part 11 and the partition 12 during assembly, reducing the possibility of misalignment or jamming of the tab 31 and shortening the assembly time.

[0037] In a preferred embodiment, the cover plate body 20 may be provided with a pole 21 and an explosion-proof valve 22. For example... Figure 3 As shown in the figure, an example of the cover plate body 20 having two terminals 21 is illustrated to accommodate most battery structures. However, it is not limited to this, and the number of terminals 21 can be adaptively adjusted according to the battery structure. For example, the cover plate body 20 may also have one, three, four, or more terminals 21.

[0038] Correspondingly, such as Figure 1 and Figure 2 As shown, the insulating bonding part 11 may be provided with a clearance hole 111 that penetrates the insulating bonding part 11. When the insulating bonding part 11 is in contact with the cover plate body 20, at least a portion of the pole post 21 is exposed by the clearance hole 111 so that the pole tab 31 can be connected to the cover plate body 20 through the clearance hole 111.

[0039] Preferably, such as Figure 1 and Figure 2 As shown, the above-mentioned insulating bonding part 11 may be provided with a first vent hole 112. When the insulating part is assembled in the battery, the first vent hole 112 is arranged opposite to the explosion-proof valve 22 to ensure the smooth venting of the explosion-proof valve 22.

[0040] Preferably, such as Figures 1 to 3 As shown, the aforementioned partition 12 may be provided with a support portion 122 and an exhaust portion 121. The exhaust portion 121 is provided with a second exhaust hole 1213 that penetrates the partition 12. When the insulating component is assembled inside the battery, the explosion-proof valve 22, the first exhaust hole 112, and the second exhaust hole 1213 are arranged facing each other along the first direction F1. The support portion 122 is arranged facing the terminal post 21. In this way, on the one hand, the support portion 122 is facing the terminal post 21, which can specifically support the corresponding area of ​​the tab 31, reduce the pulling of the electrode group 3 on the connection between the tab 31 and the terminal post 21, and maintain the stability of the electrical connection. On the other hand, the explosion-proof valve 22, the first exhaust hole 112, and the second exhaust hole 1213 are arranged facing each other to form a continuous exhaust channel, so that the high-temperature gas during thermal runaway can be quickly discharged to the outside of the battery.

[0041] by Figure 3 The example shown is that the cover plate body 20 is provided with two pole posts 21. Correspondingly, the partition 12 may include two support parts 122. The two support parts 122 are respectively provided on both sides of the exhaust part 121 in the third direction F3, so as to correspond to the two pole posts 21 respectively.

[0042] Preferably, such as Figures 1 to 3 As shown, the exhaust portion 121 may include a cover plate 1211 and a supporting wall 1212. The supporting wall 1212 is disposed on the side of the cover plate 1211 facing the insulating bonding portion 11. The supporting wall 1212 is disposed around the edge of the cover plate 1211 at least once to support and form a gas-accommodating space between the insulating bonding portion 11 and the partition portion 12. In this way, the supporting wall 1212 separates the cover plate 1211 from the insulating bonding portion 11, preventing the two from deforming and sticking together due to high temperature and blocking the exhaust hole. The wall is disposed around the edge, which can guide the gas to concentrate towards the second exhaust hole 1213, reducing the decrease in exhaust efficiency caused by gas leakage.

[0043] Preferably, such as Figures 1 to 3As shown, the aforementioned support portion 122 may include a first support plate 1221 and a second support plate 1222 connected to each other. The first support plate 1221 is used to abut against the electrode assembly 3, and the second support plate 1222 is used to abut against the insulating bonding portion 11. Thus, the first support plate 1221 and the second support plate 1222 form a double-layer support structure, which can transmit the pressure of the electrode assembly 3 to the insulating bonding portion 11 through the second support plate 1222, disperse stress, reduce the deformation of the support portion 122 caused by long-term stress, and ensure continuous and effective support for the electrode assembly 3.

[0044] Optionally, such as Figure 1 and Figure 2 As shown, the aforementioned support portion 122 may further include a transition connector 1223, through which the first support plate 1221 and the second support plate 1222 can be connected. In this way, on the one hand, the transition connector 1223 smoothly transfers the gravity of the pole group 3 borne by the first support plate 1221 to the second support plate 1222, avoiding stress concentration caused by the direct connection between the first support plate 1221 and the second support plate 1222, reducing the risk of breakage of the support portion 122, and ensuring stable support effect during long-term use. On the other hand, the transition connector 1223 can form a smooth curved surface or transition structure, providing guidance for the electrode tab 31 to move around, avoiding sharp friction at the connection corner between the electrode tab 31 and the support portion 122, protecting the integrity of the electrode tab 31, and reducing the risk of short circuit caused by damage to the electrode tab 31.

[0045] Preferably, such as Figure 2 and Figure 3 As shown, the first support plate 1221 and the cover plate 1211 are aligned on the side opposite to the insulating bonding part 11. Thus, the alignment of the first support plate 1221 and the cover plate 1211 means that the force-bearing surfaces of the support part 122 and the exhaust part 121 on the pole group 3 side are flush, which can evenly bear the weight of the pole group 3 and avoid the pole group 3 from being subjected to uneven local force, further reducing the risk of short circuit in the electrode tab 31.

[0046] Preferably, such as Figures 1 to 3 As shown, the aforementioned support portion 122 may further include a support end wall 1225, which is disposed on the side of the first support plate 1221 opposite to the pole group 3, and the support end wall 1225 is disposed on the side of the first support plate 1221 away from the second support plate 1222 in the third direction F3, so as to ensure the support stability of the end of the first support plate 1221 away from the support enclosure wall 1212.

[0047] Preferably, such as Figure 1 , Figure 6 and Figure 7As shown, the insulating bonding part 11 may be provided with a first snap-fit ​​member 113, and the corresponding position of the partition part 12 is provided with a second snap-fit ​​member 123. When the insulating part is in the assembled state, the first snap-fit ​​member 113 and the second snap-fit ​​member 123 can snap into each other to fix the insulating bonding part 11 and the partition part 12 in the first direction F1, thereby improving the positioning accuracy and setting stability of the insulating bonding part 11 and the partition part 12 in the assembled state.

[0048] Optionally, the first card connector 113 can be a card hole, and the second card connector 123 can be a card claw.

[0049] The second aspect of this application also provides a cover plate assembly, including the cover plate body 20 and the insulating member described in any of the above embodiments, and thus has all the beneficial technical effects of the insulating member, which will not be repeated here.

[0050] Preferably, the cover plate body 20 may be provided with a mounting hole for the pole post 21 to pass through.

[0051] Preferably, such as Figure 4 , Figure 5 and Figure 7 As shown, the cover plate assembly may further include an insulating ring 24, which may be disposed on the side of the cover plate body 20 opposite to the insulating member. The insulating ring 24 is clamped to the end of the pole post 21, and at least a portion of the insulating ring 24 is disposed between the pole post 21 and the cover plate body 20, so as to achieve insulation between the side wall of the cover plate body 20 opposite to the insulating member and the pole post 21.

[0052] Preferably, such as Figure 4 , Figure 5 and Figure 7 As shown, the cover plate assembly may also include an insulating sleeve 23, which can be sleeved on the outside of the pole post 21 and disposed in the mounting hole to achieve insulation between the cover plate body 20 and the pole post 21 in the mounting hole.

[0053] Preferably, such as Figure 4 , Figure 5 and Figure 7 As shown, the two ends of the insulating sleeve 23 in the first direction F1 can respectively abut against the insulating ring 24 and the insulating component to achieve complete insulation between the cover plate body 20 and the pole post 21.

[0054] An embodiment of the third aspect of this application also provides a battery including the insulating element described in any of the above embodiments and / or the cover plate assembly described in any of the above embodiments, thus having all the beneficial technical effects of the insulating element, which will not be repeated here.

[0055] Optionally, the battery may also include the aforementioned electrode assembly 3.

[0056] 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. An insulating member, characterized by, Insulation between the cover body and the electrode assembly of the battery, the insulating component includes an insulating bonding part and a blocking part, the insulating bonding part being used to bond to the side of the cover body facing the electrode assembly; When the insulating component is assembled inside the battery, the cover plate body, the insulating bonding part, the partition part, and the electrode group are arranged sequentially along a first direction. The electrode tabs of the electrode group can bypass the partition part and extend between the insulating bonding part and the partition part to connect with the cover plate body.

2. The insulator of claim 1, wherein It also includes a bent connection portion that connects the insulating bonding portion and the partition portion, so that the insulating component can switch between an unfolded state and an assembled state.

3. The insulator of claim 2, wherein The insulating bonding part, the partition part, and the bending connection part are integrated into a single connecting piece.

4. The insulator of claim 2, wherein When the insulating component is in the assembled state, the bent connection portion is disposed on one side of the insulating component in the second direction, and the electrode extends from the other side of the insulating component in the second direction between the insulating bonding portion and the partition portion, wherein the second direction is perpendicular to the first direction.

5. The insulator of claim 4, wherein, The partition portion has an avoidance notch on the side away from the bent connection portion in the second direction, and the electrode tab extends through the avoidance notch between the insulating bonding portion and the partition portion.

6. The insulating element according to any one of claims 1 to 5, characterized in that, The cover plate body is equipped with a pole and an explosion-proof valve; The insulating bonding part is provided with a clearance hole and a first vent hole that penetrate the insulating bonding part; The partition is provided with a support part and an exhaust part, and the exhaust part is provided with a second exhaust hole penetrating the partition; With the insulating component assembled inside the battery, the explosion-proof valve, the first vent, and the second vent are arranged facing each other along the first direction, at least a portion of the pole is exposed by the clearance hole, and the support portion is arranged facing the pole.

7. The insulator of claim 6, wherein The exhaust section includes a cover plate and a supporting wall. The supporting wall is disposed on the side of the cover plate facing the insulating bonding portion. The supporting wall is disposed around the edge of the cover plate at least once to support the formation of an air-accommodating space between the insulating bonding portion and the partition portion.

8. The insulator of claim 7, wherein The support portion includes a first support plate and a second support plate connected to each other. The first support plate is used to abut against the electrode assembly, and the second support plate is used to abut against the insulating bonding portion. The first support plate and the cover plate are aligned on the side opposite to the insulating bonding part.

9. A cover plate assembly characterized by, It includes the cover plate body and the insulating element according to any one of claims 1 to 8.

10. A battery, characterized by Includes the insulating element as described in any one of claims 1 to 1; Alternatively, it may include the cover plate assembly as described in claim 9.

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