Battery cover plate and power battery

Abstract

The utility model provides a battery cover plate and a power battery, and relates to the technical field of power batteries. The battery cover plate comprises a cover plate body, a pole, a pressing piece and a sealing piece, a mounting hole is formed in the cover plate body, the pole comprises a pole body and a first limiting part arranged at one end of the pole body, the pole body is inserted into the mounting hole, and the first limiting part is located on one side of the cover plate body; the press-fit piece abuts against the side, away from the first limiting part, of the cover plate body, and part of the press-fit piece extends into the mounting hole and is connected with the column body in a clamped mode; the sealing piece is arranged between the first limiting part and the cover plate body and abuts against the first limiting part, the cover plate body and the pressing piece. According to the battery cover plate provided by the invention, the pressing piece is arranged, the stable clamping space is formed between the pressing piece and the first limiting part, and the sealing performance of the sealing piece is ensured through double extrusion of the cover plate body and the pressing piece.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery cover and a power battery. Background Art

[0002] Power batteries provide power for new energy vehicles.

[0003] The power battery includes a battery body and a battery cover plate covered on the battery body. The battery cover plate includes a cover plate body, a pole and a seal. The cover plate body is covered on the battery body. The pole is passed through the cover plate body, and the pole is conductively connected to the battery core in the battery body. The seal is arranged between the cover plate body and the pole to ensure the sealing performance between the cover plate body and the pole.

[0004] However, as the power battery is used, the pole is prone to settlement, that is, the pole moves toward the side of the cover plate toward the battery body, causing the seal to separate from the cover plate, resulting in failure of the seal. Utility Model Content

[0005] The present application provides a battery cover and a power battery, which can solve the problem of sealing failure caused by pole settlement in the existing battery cover.

[0006] On the one hand, the present application provides a battery cover, including a cover body, a pole, a press-fit piece and a seal, wherein the cover body is provided with a mounting hole, the pole includes a column and a first limit portion arranged at one end of the column, the column is inserted into the mounting hole, and the first limit portion is located on one side of the cover body;

[0007] The pressing piece is in contact with a side of the cover body away from the first limiting portion, and a portion of the pressing piece extends into the mounting hole and is connected to the column;

[0008] The sealing member is disposed between the first limiting portion and the cover body, and the sealing member is in contact with the first limiting portion, the cover body and the pressing member respectively.

[0009] In a possible implementation, the battery cover provided in the present application, the pressing part includes an abutment portion, an extension portion and a connection portion that are bent and connected in sequence, the abutment portion abuts against a side of the cover body away from the first limiting portion, the extension portion is located in the mounting hole, the connection portion is connected to the column, and the connection portion abuts against the sealing member.

[0010] In a possible implementation, in the battery cover provided in the present application, the abutting portion and the connecting portion are respectively located on two opposite sides of the extending portion.

[0011] In a possible implementation, the battery cover provided in the present application has a groove on the side of the cover body facing the first limiting portion, the groove is located on the peripheral side of the mounting hole and is connected to the mounting hole, and the connecting portion is raised relative to the bottom of the groove.

[0012] In a possible implementation, the battery cover provided in the present application has a connecting groove on the column, and the connecting portion is connected to the connecting groove.

[0013] In a possible implementation, in the battery cover provided in the present application, the pole further includes a second limiting portion, the second limiting portion is disposed on the column, and the second limiting portion is spaced apart from the first limiting portion to form the connecting groove.

[0014] In a possible implementation, in the battery cover provided in the present application, the second limiting portion is a diameter-changing section arranged on the column, the diameter of the diameter-changing section is larger than the diameter of the column, and the diameter of the diameter-changing section is smaller than the diameter of the first limiting portion, and the connecting portion abuts against the second limiting portion on one side of the first limiting portion.

[0015] In a possible implementation, the battery cover provided in the present application further includes an insulating member, wherein the insulating member is disposed between the cover body and the pressing member.

[0016] In a possible implementation, the battery cover provided in the present application also includes a first plastic sealing member and a second plastic sealing member, wherein the first plastic sealing member is arranged on a side of the cover body away from the first limiting portion, and the second plastic sealing member is arranged on a side of the cover body facing the first limiting portion, and the first plastic sealing member and the second plastic sealing member seal the cover body, the pressing member, the sealing member and the pole.

[0017] On the other hand, the present application also provides a power battery, comprising a battery body and any one of the above-mentioned battery cover plates, wherein the battery body is connected to the battery cover plate.

[0018] The battery cover and power battery provided by the present application, the battery cover includes a cover body, a pole, a press-fit piece and a seal. By setting the press-fit piece, the press-fit piece is abutted against the side of the cover body away from the first limiting portion on the pole, and the press-fit piece is extended to the side of the cover body facing the first limiting portion. When the seal is set between the first limiting portion and the cover body, by applying pressure to the pole, the press-fit piece and the cover body can jointly press the seal against the first limiting portion, thereby ensuring the sealing performance between the cover body and the first limiting portion. Among them, since the press-fit piece abuts against the side of the cover body away from the first limiting portion, and part of the press-fit piece is also connected to the pole, in combination with the first limiting portion, a stable clamping space is formed between the press-fit piece and the first limiting portion, so as to clamp the cover body and the seal between the press-fit piece and the first limiting portion. When the pole tends to sink, the pole will drive the pressing piece to move together, and the pressing piece will further drive the cover body to move, so that the cover body and the pressing piece will act on the seal through the double extrusion of the cover body and the pressing piece. The sealing performance of the seal is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a battery cover provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 A structural diagram of the battery cover from another perspective;

[0022] Figure 3 for Figure 1 AA section view of the middle battery cover;

[0023] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0024] Description of reference numerals:

[0025] 100-cover plate body; 110-groove; 111-mounting hole;

[0026] 200-pole; 210-column; 220-first limiting portion; 230-second limiting portion;

[0027] 300-pressing part; 310-abutting part; 320-extending part; 330-connecting part;

[0028] 400 - Seal;

[0029] 500 - Insulating part;

[0030] 600 - First plastic encapsulation part;

[0031] 700 - Second plastic encapsulation part. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0033] In the prior art, a power battery includes a battery body and a battery cover plate covering the battery body. The battery cover plate includes a cover plate body, a pole column, a seal and an insulating part. The cover plate body covers the battery body to seal the battery cells in the battery body. The pole column penetrates through the cover plate body so that the pole column can be electrically connected to the battery cells in the battery body, and the battery cells are electrically connected to an electrical device through the pole column. There is a fitting gap between the pole column and the cover plate body. Therefore, a seal needs to be provided in the fitting gap to ensure the sealing performance between the cover plate body and the pole column, and an insulating part also needs to be provided in the fitting gap to insulate the cover plate body from the pole column through the insulating part to avoid electric leakage.

[0034] However, with the use of the power battery, when the power battery is in an overcharged state or an overdischarged state for a long time, or when the power battery is in a high-temperature environment for a long time, it is easy for the pole column to sink, that is, the pole column moves towards the side of the battery body relative to the cover plate body, which will cause the fitting gap between the cover plate body and the pole column to increase. As the fitting gap increases, the extrusion effect of the cover plate body and the pole column on the seal will be weakened, and the seal may even be separated from the cover plate body, thereby causing the seal to fail. The failure of the seal will make the sealing performance between the cover plate body and the pole column worse, thereby affecting the safety performance of the battery cover plate and the power battery.

[0035] In order to overcome the defects in the prior art, the present application provides a battery cover and a power battery, wherein a pressing piece is arranged so that the pressing piece abuts against the side of the cover body away from the first limiting portion on the pole, and the pressing piece extends to the side of the cover body facing the first limiting portion. When the sealing member is arranged between the first limiting portion and the cover body, by applying pressure to the pole, the pressing piece and the cover body can jointly press the sealing member onto the first limiting portion, thereby ensuring the sealing performance between the cover body and the first limiting member.

[0036] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0037] Reference Figures 1 to 4 As shown, an embodiment of the present application provides a battery cover, including a cover body 100, a pole 200, a pressing piece 300 and a sealing piece 400, the cover body 100 is provided with a mounting hole 111, the pole 200 includes a column 210 and a first limiting portion 220 arranged at one end of the column 210, the column 210 is inserted into the mounting hole 111, and the first limiting portion 220 is located on one side of the cover body 100.

[0038] The pressing piece 300 abuts against a side of the cover body 100 away from the first limiting portion 220 , and a portion of the pressing piece 300 extends into the mounting hole 111 and is connected to the column 210 .

[0039] The sealing member 400 is disposed between the first limiting portion 220 and the cover body 100 , and the sealing member 400 abuts against the first limiting portion 220 , the cover body 100 and the pressing member 300 , respectively.

[0040] It can be understood that, in the specific setting, except for the cover body 100, other structures of the battery cover can be set in two groups to respectively connect with the positive and negative electrodes of the battery core. Two mounting holes 111 are provided on the cover body 100, so that the column 210 of the pole 200 can be stably inserted on the cover body 100 through the mounting holes 111. The first limiting portion 220 is provided on the column 210. The first limiting portion 220 is a boss structure provided at the end of the column 210. When the column 210 is inserted into the mounting hole 111, the first limiting portion 220 can be located on one side of the cover body 100 to abut against the surface of the cover body 100 to prevent the pole 200 from passing through the mounting hole 111. Exemplarily, the first limiting portion 220 is located on the side of the cover body 100 facing the battery body.

[0041] The pressing member 300 is disposed on the cover plate body 100, and the pressing member 300 abuts against the side of the cover plate body 100 facing away from the first limiting portion 220, that is, the pressing member 300 abuts against the side of the cover plate body 100 facing away from the battery body. The pressing member 300 extends into the mounting hole 111 until it reaches the side of the cover plate body 100 facing the battery body, so that the pressing member 300 is flush with or protrudes relative to the side of the cover plate body 100 facing the battery body. Moreover, the portion of the pressing member 300 extending to the side of the cover plate body 100 facing the battery body is also connected to the column body 210, so as to limit the side of the pole column 200 facing the battery body by the pressing member 300. When the pole column 200 sinks, there will be a tendency to move towards the battery body side, thereby driving the pressing member 300 to also have a moving tendency. Since the pressing member 300 abuts against the side of the cover plate body 100 facing away from the battery body, the pressing member 300 can limit the movement of the pole column 200 towards the battery body, that is, the pressing member 300 prevents the pole column 200 from sinking.

[0042] A sealing member 400 is further disposed on the pole column 200, specifically, it can be a rubber ring. The sealing member 400 is located between the first limiting portion 220 and the side of the cover plate body 100 facing the battery body to ensure the sealing performance between the cover plate body 100 and the pole column 200 on this side.

[0043] During specific implementation, pressure can be applied to the pole column 200 so that the pole column 200 acts on the pressing member 300 with this pressure to engage with the pressing member 300. Under the action of this pressure, the pressing member 300 will also be pressed towards the first limiting portion 220, and then cooperate with the first limiting portion 220 to press the part of the cover plate body 100 and the sealing member 400 between the pressing member 300 and the first limiting portion 220. Thereby, the side of the sealing member 400 facing the cover plate body 100 can be in close contact with the cover plate body 100 and the pressing member 300, and the side of the sealing member 400 facing the first limiting portion 220 can be in close contact with the first limiting portion 220, thereby ensuring the sealing performance between the first limiting portion 220 and the cover plate body 100. In addition, the pressing member 300 also abuts against the sealing member 400, that is, a double extrusion is applied to the sealing member 400, so that the abutting area of the sealing member 400 is larger, the abutting is closer, and the sealing performance is better.

[0044] When the pole column 200 sinks subsequently, the pressing member 300 can be used to prevent the pole column 200 from sinking, limit the increase in the distance between the first limiting portion 220 and the side of the cover plate body 100 facing the first limiting portion 220, avoid the weakening of the extrusion effect of the cover plate body 100 and the first limiting portion 220 on the sealing member 400, and further prevent the separation and failure of the sealing member 400, ensuring the sealing performance of the battery cover plate.

[0045] Therefore, the battery cover plate provided by the embodiments of the present application includes a cover plate body 100, a pole column 200, a pressing member 300, and a sealing member 400. By providing the pressing member 300, the pressing member 300 abuts against a side of the cover plate body 100 facing away from the first limiting portion 220 of the pole column 200, and the pressing member 300 extends into the mounting hole 111. When the sealing member 400 is disposed between the first limiting portion 220 and the cover plate body 100, by applying pressure to the pole column 200, the pole column 200 can be clamped with the pressing member 300, and the pressing member 300 and the cover plate body 100 can jointly press the sealing member 400 against the first limiting portion 220 by using this pressure, thereby ensuring the sealing performance between the cover plate body 100 and the first limiting portion 220.

[0046] Wherein, since the pressing member 300 abuts against a side of the cover plate body 100 facing away from the first limiting portion 220, and a part of the pressing member 300 is also connected to the pole column 200, thereby combining with the first limiting portion 220, a stable clamping space is formed between the pressing member 300 and the first limiting portion 220 to clamp the cover plate body 100 and the sealing member 400 between the pressing member 300 and the first limiting portion 220. When the pole column 200 has a tendency to settle, the pole column 200 will drive the pressing member 300 to have a moving tendency together, and the pressing member 300 further drives the cover plate body 100 to have a moving tendency, and further makes the cover plate body 100 and the pressing member 300 act the moving tendency on the sealing member 400, and the sealing performance of the sealing member 400 is ensured by the double extrusion of the cover plate body 100 and the pressing member 300.

[0047] In some embodiments, as shown in Figure 4 FIG. [not shown in the provided text, assumed to be a reference figure], the pressing member 300 includes an abutting portion 310, an extending portion 320, and a connecting portion 330 that are sequentially bent and connected. The abutting portion 310 and the connecting portion 330 are respectively located on opposite sides of the extending portion 320. The abutting portion 310 abuts against a side of the cover plate body 100 facing away from the first limiting portion 220. The extending portion 320 is located in the mounting hole 111. The connecting portion 330 is connected to the column body 210, and the connecting portion 330 abuts against the sealing member 400.

[0048] Exemplarily, the pressing member 300 can be set as an annular workpiece formed by stamping a stainless steel piece. The annular workpiece includes an abutting portion 310, an extending portion 320, and a connecting portion 330 from outside to inside in sequence. The abutting portion 310 and the connecting portion 330 are bent relative to the extending portion 320. The abutting portion 310 abuts against a side of the cover plate body 100 away from the first limiting portion 220. The extending portion 320 is located in the mounting hole 111. The diameter of the extending portion 320 is greater than the diameter of the column body 210, and the diameter of the extending portion 320 is less than the aperture of the mounting hole 111. The side of the connecting portion 330 facing away from the first limiting portion 220 is clamped with the column body 210, and the side of the connecting portion 330 facing the first limiting portion 220 abuts against the sealing member 400.

[0049] Among them, referring to Figure 4 as shown, the abutting portion 310 and the connecting portion 330 are respectively located on opposite sides of the extending portion 320. With such a setting, the overall structure of the pressing member 300 can be simple and compact, facilitating the pressing member 300 to extend into the mounting hole 111 after abutting against the cover plate body 100 to connect with the column body 210.

[0050] In some embodiments, referring to Figure 3 and Figure 4 as shown, the side of the cover plate body 100 facing the first limiting portion 220 has a groove 110. The groove 110 is located on the circumferential side of the mounting hole 111 and is communicated with the mounting hole 111. The connecting portion 330 protrudes relative to the groove 110.

[0051] With such a setting, the groove 110 can be utilized to provide positioning and guiding for the pole column 200 inserted into the mounting hole 111, making the connection between the pole column 200 and the cover plate body 100 more convenient. And the pressing member 300 protrudes relative to the groove 110, and at least a part of the first limiting portion 220 is located in the groove 110, which can reduce the overall thickness of the battery cover plate, improve the space utilization rate of the battery cover plate, and ensure the sealing performance of the sealing member 400 in the groove 110.

[0052] It can be understood that the pressing member 300 extends through the mounting hole 111 to the side of the cover plate body 100 facing the first limiting portion 220, and the connecting portion 330 protrudes relative to this side. When pressure is subsequently applied to the pole column 200, when the connecting portion 330 and the cover plate body 100 squeeze the sealing member 400 under pressure, the squeezing effect of the connecting portion 330 on the sealing member 400 can be stronger than that of the cover plate body 100 on the sealing member 400, making the seal between the connecting portion 330 and the first limiting portion 220 good. And the squeezing of the connecting portion 330 on the sealing member 400 can, to a certain extent, squeeze part of the sealing member 400 towards the cover plate body 100, making the sealing member 400 further closely abut against the cover plate body 100, and can also improve the sealing performance between the cover plate body 100 and the first limiting portion 220.

[0053] In other embodiments, the pressing member 300 can also be flush with the side of the cover plate body 100 facing the first limiting portion 220, so that the squeezing of the pressing member 300 and the cover plate body 100 on the sealing member 400 is more balanced, ensuring the sealing performance while ensuring the reliability and stability of the sealing member 400.

[0054] In some embodiments, referring to Figure 4 as shown, the column body 210 has a connecting groove, and the connecting portion 330 is connected to the connecting groove. It can be understood that setting the connecting groove on the column body 210 facilitates the connection between the connecting portion 330 and the connecting groove, ensuring the connection between the connecting portion 330 and the column body 210 of the pole column 200.

[0055] In specific implementation, with reference to Figure 4 As shown, the terminal post 200 further includes a second limiting portion 230. The second limiting portion 230 is disposed on the column body 210. The second limiting portion 230 is spaced from the first limiting portion 220 to form a connection groove. With such a setting, the clamping connection between the column body 210 and the connection portion 330 of the pressing member 300 can be made more convenient and reliable, and the sealing member 400 can be disposed in the connection groove, making the battery cover plate structure more compact.

[0056] Moreover, with reference to Figure 4 As shown, the second limiting portion 230 is a reduced-diameter section disposed on the column body 210. The diameter of the reduced-diameter section is larger than the diameter of the column body 210 and smaller than the diameter of the first limiting portion 220. The connection portion 330 abuts against the side of the second limiting portion 230 facing the first limiting portion 220. With such a setting, the structure of the terminal post 200 can be simple and compact, facilitating the connection between the terminal post 200 and the cover plate body 100, and also facilitating the connection between the pressing member 300, the sealing member 400 and the terminal post 200.

[0057] Wherein, the second limiting portion 230 is formed by riveting the column body 210.

[0058] It can be understood that before riveting, the terminal post 200 only includes the terminal post 200 and the first limiting portion 220, so as to facilitate the assembly of components such as the terminal post 200, the cover plate body 100, the sealing member 400, and the pressing member 300. After the assembly is completed, the terminal post 200 is riveted, and a reduced-diameter section is machined on the terminal post 200 to form the second limiting portion 230, so that the stepped surface of the second limiting portion 230 facing the first limiting portion 220 is clamped with the connection portion 330 of the pressing member 300, and the pressing member 300 and the first limiting portion 220 press and hold components such as the cover plate body 100 and the sealing member 400 tightly, and the structure is relatively stable and reliable.

[0059] In addition, with reference to Figure 3 and Figure 4 As shown, the battery cover plate provided by the embodiment of the present application further includes an insulating member 500. The insulating member 500 is disposed between the cover plate body 100 and the pressing member 300.

[0060] With such a setting, the insulating member 500 can be used to block the current path between the cover plate body 100 and the terminal post 200 to prevent the battery cover plate from leaking electricity. The specific shape of the insulating member 500 depends on the setting position and the specific structures of the cover plate body 100 and the pressing member 300 on both sides of the insulating member 500. Specifically, the insulating member 500 can be a polypropylene member, a polyimide member, a polyamide resin member, etc., and has good heat resistance, chemical stability and electrical insulation.

[0061] Moreover, with reference to Figures 1 to 4As shown, the battery cover plate provided by the embodiment of the present application further includes a first plastic sealing member 600 and a second plastic sealing member 700. The first plastic sealing member 600 is disposed on the side of the cover plate body 100 away from the first limiting portion 220, and the second plastic sealing member 700 is disposed on the side of the cover plate body 100 facing the first limiting portion 220. The first plastic sealing member 600 and the second plastic sealing member 700 seal and bond the cover plate body 100, the pressing member 300, the sealing member 400, and the pole column 200.

[0062] Among them, the first plastic sealing member 600 is disposed on the side of the cover plate body 100 away from the first limiting portion 220, that is, on the side of the cover plate body 100 away from the battery body. From this side, the cover plate body 100, the pressing member 300, the insulating member 500, and the main body and the second limiting portion 230 of the pole column 200 are sealed and bonded. The second plastic sealing member 700 is disposed on the side of the cover plate body 100 facing the first limiting portion 220, that is, on the side of the cover plate body 100 facing the battery body, and seals and bonds the groove 110 of the cover plate body 100, the sealing member 400, and the first limiting portion 220 of the pole column 200 from this side, ensuring the stable and reliable structure of the battery cover plate and ensuring the stable connection between the pole column 200, the sealing member 400, the insulating member 500, the pressing member 300, etc. and the cover plate body 100.

[0063] The specific assembly operation of the battery cover plate provided by the embodiment of the present application is as follows:

[0064] First, a sealing member 400 is sleeved on the first limiting portion 220 of the pole column 200, and then the second plastic sealing member 700 is assembled so that the second plastic sealing member 700 abuts against the outer sides of the first limiting portion 220 and the sealing member 400. Then, a cover plate member is covered on the side of the second plastic sealing member 700 and the sealing member 400 away from the first limiting portion 220, so that the column body 210 of the pole column 200 passes through the mounting hole 111 on the cover plate body 100. Then, an insulating member 500 is disposed between the mounting hole 111 and the column body 210, and a pressing member 300 is disposed between the insulating member 500 and the column body 210, so that the abutting portion 310 of the pressing member 300 abuts against the cover plate body 100 through the insulating member 500. The extending portion 320 of the pressing member 300 is located in the mounting hole 111, and the connecting portion 330 of the pressing member 300 abuts against the sealing member 400. Then, the column body 210 is riveted, and a second limiting portion 230 is formed on the column body 210 by processing, so that the second limiting portion 230 is clamped with the connecting portion 330 of the pressing member 300. Finally, the first plastic sealing member 600 is disposed to complete the assembly of the battery cover plate.

[0065] The embodiment of the present application further provides a power battery, including a battery body and any one of the above battery cover plates, and the battery body is connected to the battery cover plate.

[0066] The specific structure of the battery cover plate has been described in detail in the above embodiment and will not be elaborated here.

[0067] The power battery provided by the embodiment of the present application is provided with a battery cover plate. The battery cover plate includes a cover plate body 100, a pole column 200, a pressing member 300, and a sealing member 400. By providing the pressing member 300, the pressing member 300 abuts against one side of the cover plate body 100 facing away from the first limiting portion 220 of the pole column 200, and the pressing member 300 extends to the side of the cover plate body 100 facing the first limiting portion 220. When the sealing member 400 is arranged between the first limiting portion 220 and the cover plate body 100, by applying pressure to the pole column 200, the pressing member 300 and the cover plate body 100 can jointly press the sealing member 400 tightly on the first limiting portion 220, thereby ensuring the sealing performance between the cover plate body 100 and the first limiting member.

[0068] Among them, since the pressing member 300 abuts against one side of the cover plate body 100 facing away from the first limiting portion 220, and a part of the pressing member 300 is also connected to the pole column 200, and in combination with the first limiting portion 220, a stable clamping space is formed between the pressing member 300 and the first limiting portion 220 to clamp the cover plate body 100 and the sealing member 400 between the pressing member 300 and the first limiting portion 220. When the pole column 200 has a tendency to settle, the pole column 200 will drive the pressing member 300 to move together, and the pressing member 300 further drives the cover plate body 100 to have a tendency to move, so that the cover plate body 100 and the pressing member 300 act the moving tendency on the sealing member 400, and the sealing performance of the sealing member 400 is ensured by the double extrusion of the cover plate body 100 and the pressing member 300.

[0069] It should be noted that the phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when combining specific features, structures or characteristics with embodiments, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments whether explicitly or not.

[0070] Generally speaking, terms should be understood at least in part by their use in the context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in the sense of a singular, or can be used to describe a combination of features, structures or characteristics in the sense of a plural. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood as conveying a singular usage or conveying a plural usage.

[0071] It should be easily understood that the terms "on", "above", and "over" in this application should be interpreted in the broadest manner, such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above or over something", but may also include the meaning of "above or over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0072] In addition, spatial relative terms may be used herein for convenience of description, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another element or feature as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatial relative descriptive terms used herein may be interpreted accordingly as well.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 embodiments of the present invention.

Claims

1. A battery cover plate, characterized in that, The invention comprises a cover body (100), a pole (200), a pressing piece (300) and a sealing piece (400); the cover body (100) is provided with a mounting hole (111); the pole (200) comprises a column (210) and a first limiting portion (220) arranged at one end of the column (210); the column (210) is inserted into the mounting hole (111); and the first limiting portion (220) is located on one side of the cover body (100); The pressing piece (300) abuts against a side of the cover plate body (100) away from the first limiting portion (220), and a portion of the pressing piece (300) extends into the mounting hole (111) and is connected to the column (210); The sealing member (400) is arranged between the first limiting portion (220) and the cover plate body (100), and the sealing member (400) is respectively in contact with the first limiting portion (220), the cover plate body (100) and the pressing member (300).

2. The battery cover plate according to claim 1, wherein The pressing part (300) comprises an abutting portion (310), an extending portion (320) and a connecting portion (330) which are bent and connected in sequence, the abutting portion (310) abuts against a side of the cover plate body (100) which is away from the first limiting portion (220), the extending portion (320) is located in the mounting hole (111), the connecting portion (330) is connected to the column (210), and the connecting portion (330) abuts against the sealing member (400).

3. The battery cover plate according to claim 2, wherein The abutting portion (310) and the connecting portion (330) are respectively located on two opposite sides of the extending portion (320).

4. The battery cover plate according to claim 2, characterized in that, The cover plate body (100) has a groove (110) on one side facing the first limiting portion (220), the groove (110) is located on the peripheral side of the mounting hole (111) and is connected to the mounting hole (111), and the connecting portion (330) is raised relative to the bottom of the groove (110).

5. The battery cover plate according to any one of claims 2-4, characterized in that The column (210) has a connecting groove, and the connecting portion (330) is connected to the connecting groove.

6. The battery cover plate according to claim 5, characterized in that The pole (200) further comprises a second limiting portion (230), wherein the second limiting portion (230) is arranged on the column body (210), and the second limiting portion (230) is spaced apart from the first limiting portion (220) to form the connection groove.

7. The battery cover plate according to claim 6, characterized in that, The second limiting portion (230) is a diameter-changing section arranged on the column (210), the diameter of the diameter-changing section is larger than the diameter of the column (210), and the diameter of the diameter-changing section is smaller than the diameter of the first limiting portion (220), and the connecting portion (330) abuts against a side of the second limiting portion (230) facing the first limiting portion (220).

8. The battery cover plate according to any one of claims 1-4, characterized in that, It also includes an insulating member (500), wherein the insulating member (500) is arranged between the cover plate body (100) and the pressing member (300).

9. The battery cover plate according to any one of claims 1-4, characterized in that, It also includes a first plastic sealing component (600) and a second plastic sealing component (700), wherein the first plastic sealing component (600) is arranged on a side of the cover body (100) away from the first limiting portion (220), and the second plastic sealing component (700) is arranged on a side of the cover body (100) facing the first limiting portion (220), and the first plastic sealing component (600) and the second plastic sealing component (700) seal the cover body (100), the pressing component (300), the sealing component (400) and the pole (200).

10. A power battery, characterized in that, It comprises a battery body and the battery cover plate according to any one of claims 1 to 9, wherein the battery body is connected to the battery cover plate.

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