Battery cover plate and battery

Abstract

The utility model relates to power battery technical field and provide a kind of battery cover plate and battery.The battery cover plate includes cover plate body, the pole post being equipped in the mounting hole of cover plate body, and plastic part and sealing element;Plastic part includes the first plastic part and the second plastic part of being equipped in the both sides of cover plate body;Sealing element includes the first sealing element and the second sealing element of being set on pole post, first sealing element is close to the first plastic part setting, the second sealing element is close to the second plastic part setting, and first plastic part, first sealing element, second sealing element and second plastic part can be insulated and sealed between cover plate body and pole post;The both ends of pole post are respectively provided with support part and pressing part, support part is at least used to support first plastic part, and pressing part is by second sealing element and is pressed tightly on cover plate body on second plastic part.The battery cover plate of the utility model not only can guarantee the reliability of first plastic part and second plastic part installation, but also can improve the sealing performance of battery cover plate.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery cover. This utility model also relates to a battery equipped with the aforementioned battery cover. Background Technology

[0002] As a crucial structural component in lithium batteries, the battery cover's sealing performance directly impacts the battery's leak-proof capability, insulation characteristics, and long-term stability. Among these components, the terminals, as the core conductive parts connecting the battery's internal and external circuits, require particularly stringent sealing performance between themselves and the cover body.

[0003] Battery covers typically consist of a cover body, terminals, an upper plastic component, a lower plastic component, and a sealing ring. However, existing battery covers suffer from electrolyte leakage in practical applications, therefore, the sealing performance between the terminals and the cover body needs further improvement. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery cover that can improve the sealing performance of the battery cover.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A battery cover includes a cover body, an electrode post disposed in a mounting hole in the cover body, and a plastic part and a sealing part;

[0007] The plastic parts include a first plastic part and a second plastic part disposed on both sides of the cover plate body;

[0008] The sealing element includes a first sealing element and a second sealing element sleeved on the pole post. The first sealing element is disposed close to the first plastic part, and the second sealing element is disposed close to the second plastic part. The first plastic part, the first sealing element, the second sealing element and the second plastic part can provide insulation and sealing between the cover plate body and the pole post.

[0009] The pole post is provided with a support part and a pressing part at both ends. The support part is used to support the first plastic part at least. The pressing part presses the second plastic part onto the cover plate body through the second sealing member.

[0010] Furthermore, the pole includes a pole body; the support portion includes a first protruding edge extending radially outward along a first end of the pole body in the thickness direction of the cover plate; and / or, the clamping portion includes a second protruding edge extending radially outward along a second end of the pole body in the thickness direction of the cover plate.

[0011] Furthermore, the cover plate body is provided with a protrusion that arches out in the thickness direction of the cover plate; the mounting hole is provided through the protrusion.

[0012] Furthermore, relative to the side with the protrusion, the other side of the cover plate body is formed with a mounting groove; the first through hole of the first plastic part is provided with a support edge located in the mounting groove, and the support edge is supported on the support portion.

[0013] Furthermore, a first anti-rotation structure is provided between the cover plate body and the first plastic part, the first anti-rotation structure being used to restrict the rotation of the first plastic part relative to the cover plate body.

[0014] Furthermore, the first anti-rotation structure includes a first anti-rotation protrusion disposed on one of the cover plate body and the first plastic part, and a first anti-rotation groove disposed on the other of the cover plate body and the first plastic part; the first anti-rotation protrusion is located within the first anti-rotation groove.

[0015] Furthermore, a second anti-rotation structure is provided between the cover plate body and the second plastic part, the second anti-rotation structure being used to restrict the rotation of the second plastic part relative to the cover plate body.

[0016] Furthermore, the second anti-rotation structure includes a second anti-rotation protrusion disposed on one of the cover plate body and the second plastic part, and a second anti-rotation groove disposed on the other of the cover plate body and the second plastic part; the second anti-rotation protrusion is confined within the second anti-rotation groove.

[0017] Furthermore, the cover plate body has mounting holes at both ends, and the electrode includes a positive electrode and a negative electrode respectively disposed in each mounting hole; the cover plate body is provided with an explosion-proof valve, which is located between the positive electrode and the negative electrode, and the first plastic part is provided with a vent, which is correspondingly disposed with the explosion-proof valve; and / or, the cover plate body is provided with an injection hole, and the first plastic part is provided with a connecting hole communicating with the injection hole.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] The battery cover of this utility model, through the provision of a first sealing element and a second sealing element, is positioned close to a first plastic component and a second plastic component, respectively. These components, along with the first plastic component, the first sealing element, the second sealing element, and the second plastic component, provide insulation and sealing between the cover body and the terminal post. Simultaneously, the support and clamping parts at both ends of the terminal post cooperate to secure the first and second plastic components to the cover body. This not only ensures the reliability of the installation of the first and second plastic components but also improves the sealing performance at the terminal post installation location, thereby enhancing the sealing performance of the battery cover and resulting in excellent performance.

[0020] Furthermore, the support portion adopts a first protruding edge extending radially outward along the pole body, which facilitates design and manufacturing and provides good support for the first plastic part. The clamping portion adopts a second protruding edge extending radially outward along the pole body, which can be formed by press riveting, facilitating design and implementation. Moreover, the second protruding edge can effectively clamp the second sealing element, thereby firmly pressing the second plastic part onto the cover plate body.

[0021] Secondly, the cover plate body has protrusions, and the mounting holes are arranged on these protrusions. This not only improves the structural strength of the cover plate body itself but also enhances the structural strength at the mounting position of the pole. On the other side of the cover plate body, opposite the side with the protrusions, a mounting groove is formed, which facilitates the installation of the first plastic component. This allows the supporting edge of the first plastic component to be well supported on the support portion of the pole, ensuring the reliability of the first plastic component's installation on the cover plate body.

[0022] Furthermore, the first anti-rotation structure effectively restricts the rotation of the first plastic part relative to the cover plate body. The first anti-rotation structure uses a combination of a first anti-rotation protrusion and a first anti-rotation groove, which is simple in structure, easy to design and implement, and can effectively prevent the rotation of the first plastic part relative to the cover plate body. Thus, during battery cover plate assembly, the relative position of the first plastic part on the cover plate body can be guaranteed.

[0023] The second anti-rotation structure effectively restricts the rotation of the second plastic component relative to the cover plate body. This structure utilizes a combination of a second anti-rotation protrusion and a second anti-rotation groove. It is simple in structure, easy to design and implement, and effectively prevents the second plastic component from rotating relative to the cover plate body. This ensures the relative position of the second plastic component on the cover plate body during battery cover assembly.

[0024] In addition, the explosion-proof valve is located between the positive and negative terminals, which shortens the gas release path and quickly balances the pressure difference between the inside and outside of the battery. The vent on the first plastic part is correspondingly set to the explosion-proof valve, which facilitates the rapid discharge of gas. The liquid injection hole on the cover plate body and the connecting hole on the first plastic part facilitate the smooth liquid injection process.

[0025] Another objective of this invention is to provide a battery having a battery cover as described above.

[0026] The battery of this invention, by adopting the aforementioned battery cover, can improve the sealing performance of the battery cover, thereby improving the sealing performance of the battery and its reliability in use. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a perspective view of the battery cover plate described in an embodiment of the present utility model;

[0029] Figure 2 This is an exploded view of the battery cover plate described in an embodiment of the present invention;

[0030] Figure 3 This is a top view of the battery cover plate described in an embodiment of the present utility model;

[0031] Figure 4 for Figure 3 A sectional view along the AA direction;

[0032] Figure 5 This is a partial enlarged view of the battery cover plate described in an embodiment of the present utility model;

[0033] Figure 6 This is a partial enlarged view of the cover plate body described in an embodiment of the present utility model from a first perspective;

[0034] Figure 7 This is a partially enlarged second-view view of the cover plate body described in this embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the pole structure described in an embodiment of the present utility model;

[0036] Figure 9 This is a first-view structural schematic diagram of the second plastic part according to an embodiment of the present invention;

[0037] Figure 10 This is a structural schematic diagram of the second plastic part from a second perspective according to an embodiment of the present utility model;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Cover plate body; 2. First plastic part; 3. Second plastic part; 4. Terminal post; 6. Explosion-proof valve;

[0040] 11. Protrusion; 12. Mounting groove; 101. Mounting hole; 102. Explosion-proof valve hole; 103. Injection hole; 104. Second anti-rotation groove; 105. First anti-rotation groove; 201. First through hole; 202. Support edge; 203. First anti-rotation protrusion; 204. Vent part; 205. Connecting hole; 300. Settling groove; 301. Second through hole; 302. Second anti-rotation protrusion; 41. Positive electrode post; 42. Negative electrode post; 401. Electrode post body; 402. First protruding edge; 403. Second protruding edge; 51. First seal; 52. Second seal; 61. Explosion-proof valve body; 62. Explosion-proof valve patch. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0043] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0045] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] This embodiment relates to a battery cover that can improve the sealing performance at the terminal mounting position, thereby enhancing the sealing performance of the battery cover.

[0048] In terms of overall structure, refer to Figures 1 to 4 As shown, the battery cover plate of this embodiment includes a cover plate body 1, a terminal post 4 disposed in a mounting hole 101 of the cover plate body 1, and plastic parts and sealing parts. The plastic parts include a first plastic part 2 and a second plastic part 3 disposed on both sides of the cover plate body 1. The sealing parts include a first sealing part 51 and a second sealing part 52 sleeved on the terminal post 4. The first sealing part 51 is disposed near the first plastic part 2, and the second sealing part 52 is disposed near the second plastic part 3. The first plastic part 2, the first sealing part 51, the second sealing part 52, and the second plastic part 3 can provide insulation and sealing between the cover plate body 1 and the terminal post 4. Furthermore, each end of the terminal post 4 is provided with a support portion and a pressing portion. The support portion is at least used to support the first plastic part 2, and the pressing portion presses the second plastic part onto the cover plate body 1 through the second sealing part 52.

[0049] In the above structure, the first sealing element 51 and the second sealing element 52 are positioned close to the first plastic part 2 and the second plastic part 3, respectively. These elements, along with the first plastic part 2, the first sealing element 51, the second sealing element 52, and the second plastic part 3, provide insulation and sealing between the cover plate body 1 and the terminal post 4. This creates a double-sealing structure at the terminal post 4 mounting position, improving the sealing performance at that location and enhancing the overall sealing performance of the battery cover. Simultaneously, the cooperation of the support and clamping parts at both ends of the terminal post 4 secures the first plastic part 2 and the second plastic part 3 firmly to the cover plate body 1, ensuring reliable installation of these components.

[0050] To be more detailed, please refer to... Figures 1 to 4 As shown, and in combination Figure 5 As shown, the battery cover in this embodiment includes a cover body 1, a terminal post 4, a first plastic part 2, a second plastic part 3, a first sealing member 51, and a second sealing member 52. The first plastic part 2 is also the lower plastic part, and the second plastic part 3 is also the upper plastic part.

[0051] In addition, the cover plate body 1 is provided with a mounting hole 101, the first plastic part 2 is provided with a first through hole 201, and the second plastic part 3 is provided with a second through hole 301. In a preferred embodiment, the diameter of the first through hole 201 is larger than the diameter of the mounting hole 101, and the diameter of the mounting hole 101 is larger than the outer diameter of the pole post 4. At this time, a first gap is formed between the first plastic part 2 and the pole post 4, and between the cover plate body 1 at the end of the mounting hole 101 near the first plastic part 2 and the pole post 4. The diameter of the second through hole 301 is basically the same as that of the mounting hole 101, thus forming a second gap that communicates with the first gap between the second plastic part 3 and the pole post 4, and between the cover plate body 1 at the end of the mounting hole 101 near the second plastic part 3 and the pole post 4.

[0052] In this embodiment, the first sealing element 51 and the second sealing element 52 are sleeved on the pole post 4. The first sealing element 51 can seal the first gap, and the second sealing element 52 can seal the second gap. This allows the first plastic part 2, the first sealing element 51, the second sealing element 52 and the second plastic part 3 to insulate and seal between the cover plate body 1 and the pole post 4. Furthermore, the arrangement of the first sealing element 51 and the second sealing element 52 can also form a double sealing structure at the pole post installation position, thereby improving the sealing performance at the pole post installation position.

[0053] As a preferred embodiment, by Figure 5 Combination Figure 8 As shown, in this embodiment, the pole post 4 includes a pole post body 401, and the aforementioned support portion includes a first protruding edge 402 extending radially outward from a first end of the pole post body 401 in the thickness direction of the cover plate. Specifically, the first end in the thickness direction of the cover plate is... Figure 5 The lower end of the pole body 401 in the state. Here, the support part adopts a first protruding edge 402 that extends radially outward along the pole body 401. This structure is relatively simple, easy to design and manufacture, and can provide good support for the first plastic part 2.

[0054] The aforementioned clamping portion includes a second convex edge 403 extending radially outward from the second end of the pole body 401 in the thickness direction of the cover plate. Specifically, the second end in the thickness direction of the cover plate is... Figure 5 The upper end of the pole body 401 in the state. The clamping part adopts a second protruding edge 403 that extends radially outward along the pole body 401. After the pole 4 is assembled with the first plastic part 2, the first sealing part 51, the second plastic part 3 and the second sealing part 52, the second protruding edge 403 can be formed by press riveting, so that the second protruding edge 403 is pressed onto the second sealing part 52, and the second plastic part 3 can be pressed well onto the cover plate body 1.

[0055] In this embodiment, the first sealing element 51 and the second sealing element 52 are preferably sealing rings. Specifically, in terms of structure, as... Figure 2 and Figure 5 As shown, the first sealing ring has an L-shaped cross-section and a first main body portion located in the gap between the cover plate body 1 and the pole post 4, and a first extending flange extending radially outward from one end of the first main body portion. This first extending flange can abut against the first plastic part 2. The second sealing ring also has an L-shaped cross-section and a second extending flange located in the second main body portion, and a second extending flange extending radially outward from one end connected to the second main body portion. The second extending flange overlaps the second plastic part 3, and the second main body portion is located in the gap between the cover plate body 1 and the pole post 4, and can abut against the first main body portion of the first sealing ring.

[0056] In specific implementation, the height of the first extended protrusion in the first sealing ring before being compressed by the cover plate body 1 is H1, and the height of the first extended protrusion after compression is h1. The compression amount of the first sealing ring, i.e., h1 / H1, ranges from 25% to 45%, for example, set to 25%, 30%, 35%, 40%, or 45%. This setting can avoid the compression amount being too small, which would not meet the sealing strength, or the compression amount being too large, which would cause the first sealing ring to be over-compressed, resulting in irreversible elastic deformation that affects the service life, and cause deformation of the sealing element, affecting the actual sealing effect.

[0057] The second extended flange in the second sealing ring has a height of H2 before being compressed by the cover plate body 1, and a height of h2 after compression. The compression amount of the second sealing ring, i.e., h2 / H2, ranges from 25% to 45%, for example, set to 25%, 30%, 35%, 40%, or 45%. This setting avoids insufficient sealing strength due to too small a compression amount, or excessive compression causing irreversible elastic deformation that affects service life and seal deformation, thus affecting the actual sealing effect.

[0058] To facilitate the improvement of the installation effect of the second seal 52, such as Figure 5 , Figure 9 and Figure 10 As shown, in this embodiment, a recess 300 is also provided on the second plastic part 3, and the second sealing member 52, that is, the second sealing ring, is installed in the recess 300. This allows the second extended protrusion to better overlap the second plastic part 3, and also ensures the reliability of the installation of the second sealing ring.

[0059] In this embodiment, preferably, a protrusion 11 arching in the thickness direction of the cover plate body 1 is provided on the cover plate body 1, and a mounting hole 101 for mounting the pole post 4 is provided through the protrusion 11. At this time, the mounting hole 101 is arranged on the protrusion 11, which can improve the structural strength of the cover plate body 1 itself by utilizing the arched protrusion 11, and also improve the structural strength at the mounting position of the pole post 4.

[0060] Reference Figure 5 and Figure 6 As shown, in this embodiment, a mounting groove 12 is formed on the other side of the cover plate body 1, relative to the side with the protrusion 11. Furthermore, a support edge 202 located in the mounting groove 12 is provided at the first through hole 201 of the first plastic part 2, and the support edge 202 is supported on the support portion. Here, the mounting groove 12 facilitates the installation of the first plastic part 2, ensuring that the support edge 202 on the first plastic part 2 is well supported on the support portion of the pole post 4, thus guaranteeing the reliability of the first plastic part 2's installation on the cover plate body 1.

[0061] Specifically, a cylindrical body is formed on the first plastic part 2 at the position corresponding to the first through hole 201, extending axially from the first through hole 201 towards the mounting groove 12. A supporting edge 202 is connected to the end of the cylindrical body and extends towards the pole post 4. The cylindrical body and the supporting edge 202 are integrally formed on the first plastic part 2, and the cylindrical body and the supporting edge 202 are located in the mounting groove 12. At this time, the supporting edge 202 is set at one end of the cylindrical body, which can also improve the structural strength of the first plastic part 2.

[0062] In a preferred embodiment, a first anti-rotation structure is provided between the cover plate body 1 and the first plastic part 2. The first anti-rotation structure is used to restrict the rotation of the first plastic part 2 relative to the cover plate body 1. By utilizing the first anti-rotation structure, the rotation of the first plastic part 2 relative to the cover plate body 1 can be effectively restricted.

[0063] In some feasible embodiments, preferably, the first anti-rotation structure of this embodiment includes a first anti-rotation protrusion 203 disposed on one of the cover plate body 1 and the first plastic part 2, and a first anti-rotation groove 105 disposed on the other of the cover plate body 1 and the first plastic part 2, with the first anti-rotation protrusion 203 confined within the first anti-rotation groove 105. Through the cooperation of the first anti-rotation protrusion 203 and the first anti-rotation groove 105, the accuracy of the relative position of the first plastic part 2 on the cover plate body 1 can be ensured during battery cover assembly.

[0064] In specific implementation, refer to Figure 2 and Figure 5 and combined Figure 6As shown, a first anti-rotation protrusion 203 is provided on the first plastic part 2. The first anti-rotation protrusion 203 is arranged circumferentially along the first through hole 201. Corresponding to the first anti-rotation protrusion 203, a first anti-rotation groove 105 is provided on the cover plate body 1. The outer contours of the first anti-rotation protrusion 203 and the first anti-rotation groove 105 are polygonal. The first anti-rotation protrusion 203 is located in the first anti-rotation groove 105, and the edge of the first anti-rotation protrusion 203 can be limited by the first anti-rotation groove 105, thereby preventing the first plastic part 2 from rotating relative to the cover plate body 1.

[0065] It is understandable that, in addition to setting the first anti-rotation protrusion 203 on the first plastic part 2 and setting the first anti-rotation groove 105 on the cover plate body 1, the first anti-rotation protrusion 203 can also be set on the cover plate body 1, and correspondingly, the first anti-rotation groove 105 can be set on the first plastic part 2. Such a setting is also acceptable.

[0066] It is also understandable that the first anti-rotation structure can also use a column with a cross-sectional shape of triangle, quadrilateral or other polygon, and a slot with the same cross-sectional shape. For example, the column is set on the first plastic part 2 and the slot is set on the cover plate body 1. By inserting and cooperating the column and the slot, the rotation of the first plastic part 2 relative to the cover plate body 1 is restricted.

[0067] As a preferred embodiment, in this example, a second anti-rotation structure is provided between the cover plate body 1 and the second plastic part 3. The second anti-rotation structure is used to restrict the rotation of the second plastic part 3 relative to the cover plate body 1. This second anti-rotation structure effectively restricts the rotation of the second plastic part 3 relative to the cover plate body 1.

[0068] In some feasible embodiments, preferably, the second anti-rotation structure of this embodiment includes a second anti-rotation protrusion 302 provided on one of the cover plate body 1 and the second plastic part 3, and a second anti-rotation groove 104 provided on the other of the cover plate body 1 and the second plastic part 3, wherein the second anti-rotation protrusion 302 is confined within the second anti-rotation groove 104. Thus, during battery cover assembly, the cooperation of the second anti-rotation protrusion 302 and the second anti-rotation groove 104 can effectively prevent the second plastic part 3 from rotating relative to the cover plate body 1, thereby ensuring the accuracy of the relative position of the second plastic part 3 on the cover plate body 1.

[0069] Specifically, refer to Figure 2 , Figure 5 , Figure 7 and combined Figure 9 and Figure 10As shown, in this embodiment, a second anti-rotation protrusion 302 is provided on the second plastic part 3, and a second anti-rotation groove 104 is provided on the cover plate body 1. The second anti-rotation protrusions 302 are two arranged at circumferential intervals along the second through hole 301, and the number of second anti-rotation grooves 104 matches the number of second anti-rotation protrusions 302. During installation, the two second anti-rotation protrusions 302 on the second plastic part 3 are inserted into the corresponding second anti-rotation grooves 104. This effectively restricts the rotation of the second plastic part relative to the cover plate body 1, thereby ensuring the relative position of the second plastic part 3 relative to the cover plate body 1.

[0070] It should be noted that, in this embodiment, the number of the second anti-rotation protrusion 302 and the second anti-rotation groove 104 can be two, three, or four, etc. Of course, the second anti-rotation protrusion 302 and the second anti-rotation groove 104 can also be one. In this case, the cross-sectional shape of the second anti-rotation protrusion 302 and the second anti-rotation groove 104 is no longer circular, but is set as a triangle, quadrilateral, or other polygon. Such a setting is also feasible.

[0071] Looking back Figures 1 to 4 As shown, in this embodiment, mounting holes 101 are provided at both ends of the cover plate body 1, and the electrode post 4 includes a positive electrode post 41 and a negative electrode post 42 respectively disposed in each mounting hole 101. This allows the positive and negative electrodes to be led out on the cover plate body 1, that is, the positive and negative electrodes can be arranged on the same side of the battery. Specifically, the positive electrode post 41 and the negative electrode post 42 are structurally identical, each including an electrode post body 401, and a first protruding edge 402 and a second protruding edge 403 that connect to the electrode post body 401 and extend radially outward along the electrode post body 401. The first protruding edge 402 and the second protruding edge 403 are respectively disposed at both ends of the electrode post body 401.

[0072] In this embodiment, an explosion-proof valve 6 is provided on the cover plate body 1, located between the positive terminal 41 and the negative terminal 42. A vent 204 is provided on the first plastic part 2, corresponding to the explosion-proof valve 6. Positioning the explosion-proof valve 6 between the positive terminal 41 and the negative terminal 42 shortens the gas release path and quickly balances the pressure difference between the inside and outside of the battery. The vent 204 on the first plastic part 2, corresponding to the explosion-proof valve 6, facilitates the rapid discharge of gas.

[0073] In specific implementation, the cover plate body 1 is provided with an explosion-proof valve hole 102, and the explosion-proof valve 6 is installed at the explosion-proof valve hole 102. The explosion-proof valve 6 includes an explosion-proof valve body 61 and an explosion-proof valve patch 62. The installation of the explosion-proof valve 6 can be carried out with reference to the installation method in the prior art. In addition, in this embodiment, the venting part 204 provided on the first plastic part 2 is preferably a plurality of venting holes arranged at intervals.

[0074] Furthermore, in this embodiment, an injection hole 103 is also provided on the cover plate body 1, and a connecting hole 205 is provided on the first plastic part 2 to connect with the injection hole 103. The injection hole 103 on the cover plate body 1 and the connecting hole 205 on the first plastic part 2 facilitate the smooth progress of the injection process.

[0075] In this embodiment, during the specific assembly of the battery cover, the first sealing member 51 is sleeved on the pole post 4 with the support portion. Then, the pole post 4 with the first sealing member 51 sleeved on it passes sequentially through the first through hole 201 on the first plastic part 2, the mounting hole 101 on the cover body 1, and the second through hole 301 on the second plastic part 3. Then, the second sealing member 52 is sleeved on the pole post 4, so that the second sealing member 52 is pressed on the second plastic part 3. Then, the end of the pole post 4 near the second plastic part 3 is riveted to form a pressing part, that is, a second protruding edge 403 is formed, so that the second protruding edge 403 presses the second plastic part 3 onto the cover body 1 through the second sealing member.

[0076] The battery cover in this embodiment not only ensures the reliability of the installation of the first plastic part 2 and the second plastic part 3, but also improves the sealing performance at the installation position of the terminal post 4 by adopting a double sealing structure, thereby improving the sealing performance of the battery cover and having a good performance.

[0077] Example 2

[0078] This embodiment relates to a battery, which has a battery cover plate as described in Embodiment 1.

[0079] In terms of specific structure, the battery includes a housing with an opening and an electrode assembly disposed inside the housing. A battery cover is connected to the opening of the housing, and the terminal post 4 on the battery cover is electrically connected to the electrode assembly.

[0080] The battery in this embodiment uses the battery cover plate of Embodiment 1, which improves the sealing performance of the battery cover plate, thereby improving the sealing performance of the battery and its reliability.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cover, characterized in that: It includes a cover plate body, an electrode post disposed in the mounting hole of the cover plate body, and plastic parts and sealing parts; The plastic parts include a first plastic part and a second plastic part disposed on both sides of the cover plate body; The sealing element includes a first sealing element and a second sealing element sleeved on the pole post. The first sealing element is disposed close to the first plastic part, and the second sealing element is disposed close to the second plastic part. The first plastic part, the first sealing element, the second sealing element and the second plastic part can provide insulation and sealing between the cover plate body and the pole post. The pole post is provided with a support part and a pressing part at its two ends respectively. The support part is used to support the first plastic part at least, and the pressing part presses the second plastic part onto the cover plate body through the second sealing member.

2. The battery cover according to claim 1, characterized in that: The pole includes a pole body; The support portion includes a first protruding edge extending radially outward along a first end of the pole body in the thickness direction of the cover plate; and / or, the clamping portion includes a second protruding edge extending radially outward along a second end of the pole body in the thickness direction of the cover plate.

3. The battery cover according to claim 1, characterized in that: The cover plate body is provided with a protrusion that arches out in the thickness direction of the cover plate; The mounting hole is provided through the protrusion.

4. The battery cover according to claim 3, characterized in that: A mounting groove is formed on the other side of the cover plate body, relative to the side with the protrusion. The first plastic part has a support edge located in the mounting groove at the first through hole, and the support edge is supported on the support part.

5. The battery cover according to claim 1, characterized in that: A first anti-rotation structure is provided between the cover plate body and the first plastic part, the first anti-rotation structure being used to restrict the rotation of the first plastic part relative to the cover plate body.

6. The battery cover according to claim 5, characterized in that: The first anti-rotation structure includes a first anti-rotation protrusion provided on one of the cover plate body and the first plastic part, and a first anti-rotation groove provided on the other of the cover plate body and the first plastic part; The first anti-rotation protrusion is located in the first anti-rotation groove.

7. The battery cover according to claim 1, characterized in that: A second anti-rotation structure is provided between the cover plate body and the second plastic part, the second anti-rotation structure being used to restrict the rotation of the second plastic part relative to the cover plate body.

8. The battery cover according to claim 7, characterized in that: The second anti-rotation structure includes a second anti-rotation protrusion provided on one of the cover plate body and the second plastic part, and a second anti-rotation groove provided on the other of the cover plate body and the second plastic part; The second anti-rotation protrusion is located in the second anti-rotation groove.

9. The battery cover according to any one of claims 1 to 7, characterized in that: The cover plate body has mounting holes at both ends, and the pole includes a positive pole and a negative pole respectively disposed in each mounting hole; The cover plate body is provided with an explosion-proof valve, which is located between the positive terminal and the negative terminal. The first plastic part is provided with a vent, which is correspondingly provided with the explosion-proof valve. And / or, the cover plate body is provided with an injection hole, and the first plastic part is provided with a connecting hole that connects to the injection hole.

10. A battery, characterized in that: The battery is provided with a battery cover plate as described in any one of claims 1 to 9.

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