Cover plate assembly and battery

Abstract

The invention provides a cover plate assembly and a battery, and relates to the technical field of batteries. The cover plate assembly comprises a substrate, a pole, a supporting piece and an injection molding connecting piece. Wherein the pole penetrates through the cover plate, one end of the pole can be connected with a roll core of the battery, and the other end of the pole can be connected with external electric equipment. The supporting piece is connected with the substrate, and the supporting piece and the substrate are relatively fixed in the axial direction of the pole, so that the supporting piece is reliably connected with the substrate. The injection molding connecting piece is arranged between the supporting ring and the pole and connects the supporting ring with the pole, so that the pole and the supporting ring are relatively fixed, when the pole is subjected to axial acting force, the supporting ring can support the pole in the axial direction of the pole, the pole is prevented from moving in the axial direction of the pole relative to the cover plate, and the reliability of the pole is improved. And the stability and the reliability of the pole are ensured. The injection molding connecting piece is an insulating piece, is arranged between the pole and the supporting piece and can separate the pole from the supporting piece, so that short circuit caused by direct contact of the pole, the supporting piece and the substrate is avoided.

Description

Technical Field

[0001] The present application relates to a cover plate assembly and a battery, belonging to the technical field of batteries. Background Art

[0002] As the smallest energy storage unit, the battery cell also provides the power source for the tool. The battery cell structure usually includes the cover assembly, shell, insulation film and other parts. The core of the cover assembly is the pole, which is the interface that connects the battery cell to the external electrical equipment. One end of the pole is connected to the winding core, and the other end of the pole is inserted into the cover to be electrically connected to the external electrical equipment.

[0003] At present, insulation issues need to be considered when connecting the pole and the base plate in the cover plate assembly. Therefore, the pole and the cover plate are connected through an insulating member. Although this connection method ensures electrical safety, the connection reliability between the pole and the cover plate is poor. When the pole is subjected to axial force, it is easy to loosen and detach relative to the cover plate. Summary of the invention

[0004] The present application provides a cover plate assembly and a battery, which solves the problem of poor reliability of connection between the battery pole and the cover plate in the related art.

[0005] In a first aspect, the present application provides a cover plate assembly, comprising:

[0006] substrate;

[0007] A pole, passing through the substrate;

[0008] A support member, disposed on the substrate, wherein the support member and the substrate are relatively fixed in the axial direction of the pole;

[0009] The injection-molded connector is disposed between the support member and the pole, and the injection-molded connector connects the support member and the pole.

[0010] In some embodiments, the pole includes a first column and a second column connected to each other, the outer diameter of the second column is larger than the outer diameter of the first column, the first column is passed through the substrate, and the second column cooperates with a side plate surface of the substrate in the axial upper limit position of the pole.

[0011] In some embodiments, the base plate is provided with a mounting hole for the first column to pass through, the mounting hole has a supporting surface facing the opening of the mounting hole, and the supporting member is disposed on the supporting surface.

[0012] In some embodiments, the support member is sleeved on the first column, an inner wall of the support member and an outer wall of the first column have a gap, and at least a portion of the injection molded connector is filled between the inner wall of the support member and the outer wall of the first column.

[0013] In some embodiments, the side wall of the first column has a limiting groove, the support member is opposite to the side wall of the limiting groove and has a gap, and at least a portion of the injection-molded connector is filled between the support member and the bottom wall of the limiting groove.

[0014] In some embodiments, the limiting groove also has relative top and bottom walls, the top and bottom walls are both oriented in the axial direction of the pole, there is a gap between the support member and the top and bottom walls, and the injection molded connector is also filled between the support member and the top wall, and between the support member and the bottom wall.

[0015] In some embodiments, the support member includes a first support portion and a second support portion, the first support portion and the second support portion are arranged opposite to each other and spaced apart, and the first support portion and the second support portion are both sleeved on the first column, and the injection molded connector is also filled between the first support portion and the second support portion.

[0016] In some embodiments, the cover assembly further includes a sealing member, wherein the sealing member is sleeved on the first column, and the sealing member is located between the second column and the substrate.

[0017] In some embodiments, the support member is connected to the base plate by welding.

[0018] In a second aspect, based on the above cover plate assembly, the present application provides a battery, comprising the above cover plate assembly.

[0019] The cover plate assembly provided in the present application can be applied to a battery, wherein a pole is passed through the cover plate, one end of the pole can be connected to the winding core of the battery, and the other end of the pole can be connected to an external electrical device. The support member is connected to the substrate, and the support member and the substrate are relatively fixed in the axial direction of the pole, so that the support member and the substrate are reliably connected. The injection molded connector is arranged between the support ring and the pole, and the injection molded connector connects the support ring to the pole, so that the pole and the support ring are relatively fixed. When the pole is subjected to an axial force, the support ring can support the pole in the axial direction of the pole, preventing the pole from being displaced axially relative to the cover plate along the pole, thereby ensuring the stability and reliability of the pole. The injection molded connector is an insulating member, and the injection molded connector is arranged between the pole and the support member to separate the pole from the support member, avoiding direct contact between the pole and the support member and the substrate and short circuit, thereby improving the electrical safety of the pole.

[0020] The battery proposed in the present application uses the above-mentioned cover plate assembly, so that the connection reliability and safety of the battery and the external electrical equipment are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0022] Figure 1 A schematic diagram of a cover plate assembly according to an embodiment of the present application;

[0023] Figure 2 A schematic top view of a cover plate assembly according to an embodiment of the present application;

[0024] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0025] Figure 4 A schematic diagram of a substrate of a cover assembly according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a pole of a cover plate assembly according to an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a support member of a cover assembly according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 100-base plate, 110-mounting hole, 120-support surface,

[0030] 200-pole, 210-first column, 211-limiting groove, 211a-side wall, 211b-top wall, 211c-bottom wall, 220-second column,

[0031] 300-support member, 310-first support portion, 320-second support portion, 330-first support section, 340-second support section,

[0032] 400-Injection molded connector,

[0033] 500 - Seals. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] As the smallest energy storage unit, the battery cell also provides the power source for the tool. The battery cell structure usually includes the cover assembly, shell, insulation film and other parts. The core of the cover assembly is the pole, which is the interface that connects the battery cell to the external electrical equipment. One end of the pole is connected to the winding core, and the other end of the pole is inserted into the cover to be electrically connected to the external electrical equipment.

[0041] At present, insulation issues need to be considered when connecting the pole and the base plate in the cover plate assembly. Therefore, the pole and the cover plate are connected through an insulating member. Although this connection method ensures electrical safety, the connection reliability between the pole and the cover plate is poor. When the pole is subjected to axial force, it is easy to loosen and detach relative to the cover plate.

[0042] The cover plate assembly proposed in the present application can be applied to a battery, wherein a pole is passed through the cover plate, one end of the pole can be connected to the electrode assembly of the battery, and the other end of the pole can be connected to an external electrical device. The support member is connected to the substrate, and the support member and the substrate are relatively fixed in the axial direction of the pole, so that the support member and the substrate are reliably connected. The injection molded connector is arranged between the support ring and the pole, and the injection molded connector connects the support ring to the pole, so that the pole and the support ring are relatively fixed. When the pole is subjected to an axial force, the support ring can support the pole in the axial direction of the pole, preventing the pole from being displaced relative to the cover plate along the axial direction of the pole, thereby ensuring the stability and reliability of the pole. The injection molded connector is an insulating member, and the injection molded connector is arranged between the pole and the support member to separate the pole from the support member, avoiding direct contact between the pole and the support member and the substrate and short circuit, thereby improving the electrical safety of the pole.

[0043] The battery proposed in the present application uses the above-mentioned cover plate assembly, so that the connection reliability and safety of the battery and the external electrical equipment are higher.

[0044] The cover plate assembly and the battery provided in the present application are described in detail below in conjunction with specific embodiments.

[0045] The present application proposes a battery, including a housing, an electrode assembly and a cover assembly. The battery can be used as a power battery in a car or in other electrical devices, which is not limited by the present application.

[0046] Among them, the shell is the basic component of the battery of the present application, and the shell can provide a mounting base for at least some of the other components of the battery and protect at least some of the other components. The shell can be made of metal material, so that the shell has better structural strength, thereby making the durability and reliability of the shell better. The shell has a cavity, and the cavity in the shell can be used to install at least some of the other components of the battery. The electrode assembly can be arranged in the cavity of the shell, and the cover plate assembly blocks the opening of the cavity of the shell, and the electrode assembly can be electrically connected to the cover plate assembly.

[0047] The present application also proposes a cover plate assembly, which can be applied to the above battery. Figures 1 to 3 As shown, the cover plate assembly includes a base plate 100 , a pole 200 , a support member 300 and an injection-molded connector 400 .

[0048] Among them, the substrate 100 is the basic component of the cover assembly of the present application, and the substrate 100 can provide an installation foundation for at least part of other components of the cover assembly. The substrate 100 can be made of metal material, so that the substrate 100 has a better structural strength, thereby making the durability and reliability of the substrate 100 better. The substrate 100 can be set at the opening of the cavity of the shell, and the opening of the cavity is blocked, so that the electrode assembly in the shell can be enclosed in the cavity of the shell, so as to protect the electrode assembly.

[0049] The pole 200 is penetrated through the substrate 100, one end of the pole 200 extends into the cavity of the shell and is connected to the electrode assembly, and the other end of the pole 200 passes through the substrate 100 to the outside of the shell and is connected to an external electrical connection device, so that the electrode assembly can be connected to the external electrical connection device to realize the charging and discharging function.

[0050] The support member 300 is disposed on the substrate 100, and the support member 300 and the substrate 100 are relatively fixed in the axial direction of the pole 200, so that the support member 300 can still remain relatively fixed with the substrate 100 after being subjected to the axial force of the pole 200, thereby preventing the support member 300 from being displaced relative to the substrate 100. There is a gap between the support member 300 and the pole 200, and the injection molding connector 400 is disposed between the support member 300 and the pole 200, and the injection molding connector 400 is connected to the pole 200 and the support member 300, so that the pole 200 is connected and fixed to the support member 300 through the injection molding connector 400. When the pole 200 is subjected to an axial force of the pole 200, the force can be transmitted to the support member 300. Since the support member 300 and the substrate 100 are relatively fixed in the axial direction of the pole 200, the support member 300 can remain relatively fixed with the substrate 100 after bearing the axial force of the pole 200 transmitted by the pole 200. In this way, the pole 200 can also remain relatively fixed with the substrate 100, so that both ends of the pole 200 can remain in a state of reliable connection with the electrode assembly and the external electrical connector.

[0051] The injection molded connector 400 is an injection molded part, so the injection molded connector 400 is a plastic part, and accordingly, the injection molded connector 400 is made of an insulating material. The injection molded connector 400 is located between the support member 300 and the pole 200, so that the injection molded connector 400 can separate the support member 300 from the pole 200 to prevent the support member 300 from directly contacting the pole 200. The injection molded connector 400 is made of an insulating material so that the support member 300 and the pole 200 will not conduct electricity to each other, thereby preventing the battery from short-circuiting.

[0052] Specifically, when assembling the cover plate assembly of the present application, the support member 300 can be first fixedly connected to the substrate 100, so that the support member 300 and the substrate 100 are relatively fixed in the thickness direction of the substrate 100, that is, in the axial direction of the pole 200. Then the pole 200 is inserted into the substrate 100, and there is a gap between the pole 200 and the support member 300, so that the pole 200 and the support member 300 are not in direct contact. Finally, an injection molding connector 400 is formed between the pole 200 and the support member 300 through an injection molding process, so that the injection molding connector 400 can be connected to the pole 200 and the support member 300 at the same time, and the pole 200 and the support member 300 are separated, so as to achieve the purpose of connecting and fixing the pole 200 and the support member 300 without mutual conduction.

[0053] In some embodiments, reference Figures 1 to 3As shown, the pole 200 of the present application may be provided to include a first column 210 and a second column 220, and the first column 210 is connected to the second column 220. The first column 210 is disposed through the substrate 100, and the outer diameter of the second column 220 is greater than the outer diameter of the first column 210, so that a step surface can be formed at the connection between the second column 220 and the first column 210, and the step surface between the second column 220 and the first column 210 can be opposite to a side plate surface of the substrate 100, so that the second column 220 can cooperate with a side plate surface of the substrate 100 in the axial upper limit position of the pole 200.

[0054] Specifically, the second column 220 can be limitedly matched with the side surface of the substrate 100 facing the cavity of the shell, so that after the pole 200 is subjected to a force in the direction away from the cavity of the shell, the second column 220 and the substrate 100 are limited, thereby preventing the pole 200 from being separated from the substrate 100. An insulating pad can be provided between the second column 220 and the side surface of the substrate 100, and the insulating pad can separate the second column 220 from the side surface of the substrate 100, thereby preventing the second column 220 from directly contacting the substrate 100 and causing a short circuit.

[0055] When assembling the cover assembly of the present application, an insulating pad can be arranged on one side of the substrate 100, and then the first column 210 is inserted into the substrate 100, and the second column 220 is opposite to one side of the substrate 100 and abuts against the insulating pad. In this way, the pole 200 and the substrate 100 can be pre-fixed, so that the injection molding connector 400 can be formed between the support member 300 and the pole 200 by injection molding.

[0056] In some embodiments, it should be understood that reference 3 to Figure 4 As shown, since the pole 200 is inserted into the substrate 100, the substrate 100 is provided with a mounting hole 110 for the pole 200 to be inserted. A support surface 120 facing the orifice of the mounting hole 110 is provided in the mounting hole 110, and the support member 300 can be provided on the support surface 120, and the support surface 120 can support and fix the support member 300. Specifically, the support surface 120 is a step surface in the mounting hole 110, and the mounting hole 110 can be provided with a first hole section and a second hole section connected to each other, and the inner diameter of the first hole section is different from the inner diameter of the second hole section, so that the step surface can be supported between the first hole section and the second hole section. By arranging the support member 300 on the step surface of the mounting hole 110, the support member 300 can be located in the mounting hole 110, so that the support member 300 can use the space in the mounting hole 110, reduce the space outside the substrate 100 occupied by the support member 300, and thus make the structure of the cover assembly of the present application relatively more compact.

[0057] Specifically, the support member 300 is also made of metal, so that the support member 300 has better structural strength, so that the support member 300 can better bear the axial force of the pole 200, so that the pole 200 remains stable. When assembling the cover plate assembly of the present application, the support member 300 can be placed on the step surface in the mounting hole 110, so that the support member 300 can be pre-fixed, and then the support member 300 is connected to the mounting hole 110 by welding, so that the support member 300 is reliably connected to the substrate 100.

[0058] In addition, the support member 300 and the substrate 100 may be fixed by means of threaded connection or the like. Specifically, screw holes may be provided on the support member 300 and the support surface 120 of the mounting hole 110, and the support member 300 and the substrate 100 may be fixed by screws.

[0059] In some embodiments, reference Figure 3 As shown, in order to make the connection effect between the support member 300 and the pole 200 more reliable, the support member 300 can be set to cover the first column 210 of the pole 200. Specifically, the support member 300 is an annular structural member, and the circumferential inner wall of the support member 300 and the circumferential outer wall of the first column 210 have a gap, and the injection molded connector 400 is distributed along the circumferential outer wall of the first column 210, so that the injection molded connector 400 is located between the circumferential inner wall of the support member 300 and the circumferential outer wall of the first column 210, and the circumferential outer wall of the support member 300 can be connected to the circumferential outer wall of the pole 200 through the injection molded connector 400, so that the connection area between the support member 300 and the injection molded connector 400 is larger, and the connection area between the injection molded connector 400 and the pole 200 is also larger, and the connection reliability between the support member 300 and the pole 200 is more reliable.

[0060] In some embodiments, reference Figures 3 to 5 As shown, the side wall 211a of the first column 210 of the present application may be provided with a limiting groove 211, and the direction of the notch of the limiting groove 211 is consistent with the radial direction of the first column 210. There is a gap between the inner wall of the annular support member 300 and the side wall 211a of the limiting groove 211, wherein the side wall 211a of the limiting groove 211 is the inner wall in the limiting groove 211 opposite to the notch of the limiting groove 211, so that the support member 300 and the first column 210 can form a gap, thereby facilitating the injection molding connector 400 to be disposed between the support member 300 and the first column 210 to connect the support member 300 and the first column 210.

[0061] The limiting groove 211 of the first column 210 can limit the support member 300 , so that the connection reliability between the support member 300 and the first column 210 in the axial direction of the first column 210 is better.

[0062] In some embodiments, reference Figures 3 to 5As shown, the limiting groove 211 of the first column 210 of the present application also has a top wall 211b and a bottom wall 211c opposite to each other, and the top wall 211b and the bottom wall 211c of the limiting groove 211 are oriented in opposite directions and are in the same direction as the axial direction of the first column 210. Specifically, the top wall 211b and the bottom wall 211c of the limiting groove 211 are connected to both sides of the side wall 211a, and there is a gap between the support member 300 and the top wall 211b and the bottom wall 211c of the limiting groove 211, and the injection molding connector 400 is also filled in the gap between the support member 300 and the top wall 211b of the limiting groove 211, and the gap between the support member 300 and the bottom wall 211c of the limiting groove 211. In this way, the injection molded connector 400 can also fix the support member 300 to the top wall 211b and the bottom wall 211c of the limiting groove 211, thereby further increasing the contact area between the injection molded connector 400 and the support member 300, and increasing the contact area between the injection molded connector 400 and the pole 200, so that the connection stability and reliability between the support member 300 and the pole 200 are further improved.

[0063] In some embodiments, reference Figure 6 As shown, in order to make the assembly process of the cover plate assembly of the present application simpler and more convenient, the support member 300 may be provided to include a first support portion 310 and a second support portion 320. The first support portion 310 and the second support portion 320 are arranged opposite to each other and spaced apart, and both the first support portion 310 and the second support portion 320 are sleeved on the first column 210. Specifically, the first support portion 310 and the second support portion 320 are both semi-annular structural members, and the central angles of the first support portion 310 and the second support portion 320 are both 180°, so that the first support portion 310 and the second support portion 320 have the same structure, which facilitates the first support portion 310 and the second support portion 320 to be prepared without separate molds, thereby reducing the preparation cost of the cover plate assembly of the present application.

[0064] The injection molded connector 400 can also fill the gap between the first support portion 310 and the second support portion 320, so that the first support portion 310 and the second support portion 320 can be connected through the injection molded connector 400. In this way, there is no need to separately fix the first support portion 310 and the second support portion 320, thereby further improving the assembly efficiency of the cover assembly of the present application.

[0065] Specifically, when assembling the cover plate assembly of the present application, the first support portion 310 and the second support portion 320 can be placed on the support surface 120 of the mounting hole 110, so that the first support portion 310 and the second support portion 320 are opposite to each other and have a gap, and then the injection molding connector 400 is arranged by the injection molding process, so that the injection molding connector 400 is arranged between the first support portion 310 and the pole 200, between the second support portion 320 and the pole 200, and between the first support portion 310 and the second support portion 320. In this way, the injection molding connector 400 can be formed by a single injection molding process, and the first connection portion and the second connection portion are connected, which improves the assembly efficiency of the cover plate assembly of the present application and reduces the preparation cost of the cover plate assembly.

[0066] In some embodiments, reference Figure 3 As shown, the cover assembly of the present application may also be provided with a seal 500, which may be sleeved on the first column 210 of the pole 200 and located outside the mounting hole 110 of the substrate 100. The seal 500 is also stacked on the end surface of the second column 220 facing the substrate 100, and the seal 500 is an insulating member, specifically, it may be made of rubber. The seal 500 not only seals the area between the substrate 100 and the pole 200, but also separates the second column 220 from the plate surface of the substrate 100, to prevent the second column 220 from directly contacting the substrate 100 and causing a short circuit.

[0067] In some embodiments, reference Figure 3 As shown, the support member 300 of the present application may also be provided with a first support segment 330 and a second support segment 340 connected to each other, and both the first support segment 330 and the second support segment 340 are annular, so that both the first support segment 330 and the second support segment 340 can be sleeved on the pole 200. The outer diameter of the first support segment 330 is greater than the outer diameter of the second support segment 340, and the first support segment 330 is provided on the support surface 120 of the mounting hole 110, so that the structure of the support member 300 can be relatively more compact.

[0068] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A cover plate assembly, characterized in that: include: substrate(100); A pole (200) is disposed through the substrate (100); A support member (300) is arranged on the substrate (100), and the support member (300) and the substrate (100) are relatively fixed in the axial direction of the pole (200); An injection-molded connector (400) is disposed between the support member (300) and the pole (200), and the injection-molded connector (400) connects the support member (300) and the pole (200).

2. The cover plate assembly according to claim 1, characterized in that: The pole (200) comprises a first column (210) and a second column (220) connected to each other, the outer diameter of the second column (220) being greater than the outer diameter of the first column (210), the first column (210) being inserted through the substrate (100), and the second column (220) and a side plate surface of the substrate (100) being matched at the axial upper limit position of the pole (200).

3. The cover plate assembly according to claim 2, characterized in that: The base plate (100) is provided with a mounting hole (110) for the first column (210) to pass through, the mounting hole (110) has a support surface (120) facing the opening of the mounting hole (110), and the support member (300) is arranged on the support surface (120).

4. The cover plate assembly according to claim 2, characterized in that: The support member (300) is sleeved on the first column (210), and a gap is formed between the inner wall of the support member (300) and the outer wall of the first column (210), and at least a portion of the injection-molded connector (400) is filled between the inner wall of the support member (300) and the outer wall of the first column (210).

5. The cover plate assembly according to claim 3, characterized in that: The side wall (211a) of the first column (210) has a limiting groove (211), the support member (300) is opposite to the side wall (211a) of the limiting groove (211) and has a gap therebetween, and at least a portion of the injection-molded connector (400) is filled between the support member (300) and the bottom wall (211c) of the limiting groove (211).

6. The cover plate assembly according to claim 5, characterized in that: The limiting groove (211) also has a top wall (211b) and a bottom wall (211c) opposite to each other, the top wall (211b) and the bottom wall (211c) are both oriented in the axial direction of the pole (200), there is a gap between the support member (300) and the top wall (211b) and the bottom wall (211c), and the injection-molded connector (400) is also filled between the support member (300) and the top wall (211b), and between the support member (300) and the bottom wall (211c).

7. The cover plate assembly according to claim 4, characterized in that: The support member (300) comprises a first support portion (310) and a second support portion (320), wherein the first support portion (310) and the second support portion (320) are arranged opposite to each other and spaced apart, and the first support portion (310) and the second support portion (320) are both sleeved on the first column (210), and the injection-molded connector (400) is also filled between the first support portion (310) and the second support portion (320).

8. The cover plate assembly according to claim 2, characterized in that: The cover plate assembly further comprises a sealing member (500), wherein the sealing member (500) is sleeved on the first column (210), and the sealing member (500) is located between the second column (220) and the substrate (100).

9. The cover plate assembly according to any one of claims 1 to 8, characterized in that: The support member (300) is connected to the base plate (100) by welding.

10. A battery, characterized in that: The invention comprises a cover plate assembly as claimed in any one of claims 1 to 9.

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