Cover plate assembly of battery and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a cover plate assembly of a battery and the battery, and the cover plate assembly of the battery comprises a cover body, an anti-explosion valve and a connecting piece; the cover body is used for being installed on a shell of the battery, a containing cavity is formed in the cover body, the anti-explosion valve is embedded in the containing cavity, and the anti-explosion valve is detachably connected with the cover body through a connecting piece. The explosion-proof valve can be replaced regularly, so that normal work of the battery is guaranteed; and after the explosion-proof valve is disassembled, electrolyte can be supplemented into the battery, so that the service life of the battery can be prolonged.

Description

Technical Field

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

[0002] With the continuous development of the battery industry, lithium-ion batteries are widely used in the field of power batteries due to their high energy density, providing power for vehicle operation.

[0003] The battery includes a battery body, a cover plate and an explosion-proof valve. The battery body contains a battery cell. The battery body has a receiving cavity for accommodating the cover plate, and the receiving cavity is connected to the battery cell. The cover plate is installed in the receiving cavity, and the explosion-proof valve is fixed to the cover plate by welding.

[0004] However, as the battery is continuously charged and discharged, gas will gradually be generated inside the battery, causing the pressure inside the battery to gradually increase, which will have a certain attenuation on the performance of the explosion-proof valve and affect the effectiveness of the explosion-proof valve. Utility Model Content

[0005] The present application provides a battery cover assembly and a battery, and the explosion-proof valve can be replaced regularly to ensure the normal operation of the battery.

[0006] The present application provides a battery cover assembly, comprising a cover body, an explosion-proof valve, and a connector;

[0007] The cover body is used to be installed on the battery shell. The cover body is provided with an accommodating cavity. The explosion-proof valve is embedded in the accommodating cavity. The explosion-proof valve is detachably connected to the cover body through a connecting piece.

[0008] In a possible implementation, the cover assembly of the battery provided in the present application has a connecting piece which is a screw, a threaded hole is provided on the cover body, and the screw passes through the explosion-proof valve and is threadedly connected to the threaded hole.

[0009] In one possible implementation, the cover assembly of the battery provided in the present application has at least two connecting parts on the peripheral side of the explosion-proof valve, and at least two connecting members are provided, each connecting member is provided in a one-to-one correspondence with each connecting part, and the connecting part is detachably connected to the cover body through the connecting member.

[0010] In a possible implementation, the cover plate assembly of the battery provided in the present application has a cover body with at least two clearance grooves on the peripheral side of the accommodating cavity, and each connecting portion is respectively embedded in each clearance groove.

[0011] In one possible implementation, the cover assembly of the battery provided in the present application further includes a sealing ring, which is arranged between the bottom surface of the explosion-proof valve and the accommodating cavity, and is configured to seal the explosion-proof valve and the accommodating cavity.

[0012] In a possible implementation, the cover plate assembly of the battery provided in the present application has a bottom surface of the cover body having an annular boss, and the annular boss surrounds the accommodating cavity.

[0013] In a possible implementation, the cover assembly of the battery provided in the present application further includes a protective member, which is mounted on the explosion-proof valve and is configured to protect the surface of the explosion-proof valve.

[0014] In a possible implementation, the battery cover assembly provided in the present application further includes a terminal, a lower plastic plate, and an upper plastic plate;

[0015] The pole is connected to the cover body, and the pole is used to connect to the tab in the battery;

[0016] The lower plastic plate is arranged below the cover body, and the upper plastic plate is arranged above the cover body.

[0017] In a possible implementation, the cover plate assembly of the battery provided in the present application further includes a sealing ring, which is disposed between the pole and the cover body.

[0018] The present application also provides a battery, comprising a battery body and a battery cover assembly according to any one of the above technical solutions arranged on the battery body.

[0019] The present application provides a battery cover assembly and a battery, wherein the battery cover assembly is provided with a cover body, an explosion-proof valve and a connector. The cover body is used to be installed on the battery shell, the cover body has a receiving cavity, the explosion-proof valve is embedded in the receiving cavity, and the explosion-proof valve is detachably connected to the cover body through a connector. After the battery is used for a long time, the explosion-proof valve may cause metal creep and metal fatigue problems. At this time, the explosion-proof valve can be disassembled through the connector to replace it with a new explosion-proof valve, thereby ensuring the normal operation of the battery. In addition, after the explosion-proof valve is disassembled, the electrolyte can be replenished into the battery, thereby improving the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 An overall schematic diagram of the cover assembly of the battery provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the exploded structure of the cover assembly of the battery provided in an embodiment of the present application;

[0023] Figure 3 A cross-sectional view of a cover assembly of a battery provided in an embodiment of the present application;

[0024] Figure 4 for Figure 3 A partial enlarged view of the

[0025] Figure 5 A schematic structural diagram of an explosion-proof valve embodied in a cover assembly of a battery provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100-cover body;

[0028] 110-accommodation cavity;

[0029] 120-give-way slot;

[0030] 130-annular boss;

[0031] 200-explosion-proof valve;

[0032] 210-connection part;

[0033] 300-connector;

[0034] 400-seal ring;

[0035] 500-protective parts;

[0036] 600-pole;

[0037] 700- plastic plate;

[0038] 800-lower plastic plate;

[0039] 900-Sealing ring.

[0040] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the implementation of the application described herein, for example, can be implemented in an order other than those illustrated or described herein. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

[0043] As mentioned in the background technology: With the continuous development of the battery industry, lithium-ion batteries are widely used in the field of power batteries due to their high energy density to provide power for vehicle operation.

[0044] The battery includes a battery body, a cover plate and an explosion-proof valve. The battery body contains a battery cell. The battery body has a receiving cavity for accommodating the cover plate, and the receiving cavity is connected to the battery cell. The cover plate is installed in the receiving cavity, and the explosion-proof valve is fixed to the cover plate by welding.

[0045] However, as the battery is continuously charged and discharged, gas will gradually be generated inside the battery, causing the pressure inside the battery to gradually increase, which will have a certain attenuation on the performance of the explosion-proof valve and affect the effectiveness of the explosion-proof valve.

[0046] In order to solve the technical problems raised above, the present application provides a battery cover assembly and a battery, wherein the battery cover assembly is provided with a cover body, an explosion-proof valve and a connecting piece, the cover body is used to be installed on the battery shell, the cover body has a accommodating cavity, the explosion-proof valve is embedded in the accommodating cavity, and the explosion-proof valve is detachably connected to the cover body through a connecting piece. After the battery is used for a long time, the explosion-proof valve may cause metal creep and metal fatigue problems. At this time, the explosion-proof valve can be disassembled through the connecting piece to replace it with a new explosion-proof valve, thereby ensuring the normal operation of the battery. Moreover, after disassembling the explosion-proof valve, the electrolyte can be replenished into the battery, thereby improving the service life of the battery.

[0047] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0048] Figure 1 An overall schematic diagram of the cover assembly of the battery provided in an embodiment of the present application; Figure 2 A schematic diagram of the exploded structure of the cover assembly of the battery provided in an embodiment of the present application; Figure 3 A cross-sectional view of a cover assembly of a battery provided in an embodiment of the present application; Figure 4 for Figure 3 A partial enlarged view of the .

[0049] refer to Figures 1-4 , an embodiment of the present application discloses a battery cover assembly, including a cover body 100, an explosion-proof valve 200 and a connector 300.

[0050] The cover body 100 is used to be installed on the battery housing. The cover body 100 has a receiving cavity 110 . The explosion-proof valve 200 is embedded in the receiving cavity 110 . The explosion-proof valve 200 is detachably connected to the cover body 100 through a connector 300 .

[0051] Exemplarily, the cover body 100 is made of a plain aluminum sheet or an Al-Mn alloy to ensure corrosion resistance of the cover body 100 . The thickness of the cover body 100 is between 2 and 3 mm, and the shape of the cover body 100 can be rectangular.

[0052] Exemplarily, the explosion-proof valve 200 is a circular explosion-proof disc with a notch in the middle. The residual thickness of the explosion-proof disc at the notch is between 0.045 mm and 0.3 mm, so that the explosion-proof disc can be applied to different types of batteries.

[0053] Exemplarily, the accommodating cavity 110 passes through the cover body 100. When the explosion-proof valve 200 is opened, the gas inside the battery can be discharged through the accommodating cavity 110 and the explosion-proof valve 200. The accommodating cavity 110 is stepped, and the explosion-proof valve 200 is placed on the step of the accommodating cavity 110.

[0054] Exemplarily, the connecting member 300 can be a rivet or fixing glue, or it can be a connecting ring. The outer peripheral wall of the connecting ring has an external thread, and the cover body 100 is provided with an internal thread on the inner peripheral wall of the accommodating cavity 110. The connecting ring is threadedly connected to the cover body 100 at the accommodating cavity 110. When the explosion-proof valve 200 needs to be installed on the cover body 100, the explosion-proof valve 200 is first placed in the accommodating cavity 110, and then the connecting ring is threadedly connected in the accommodating cavity 110 so that the connecting ring presses the explosion-proof valve 200 tightly in the accommodating cavity 110.

[0055] By adopting the above technical solution, after the battery is used for a long time, the explosion-proof valve 200 may cause metal creep and metal fatigue problems. At this time, the explosion-proof valve 200 can be disassembled by removing the connecting piece 300 and replaced with a new explosion-proof valve 200, thereby ensuring the normal operation of the battery. Moreover, after the explosion-proof valve 200 is disassembled, the electrolyte can be replenished into the battery, thereby improving the service life of the battery.

[0056] In some embodiments, the connecting member 300 is a screw. The cover body 100 has a threaded hole. The screw passes through the explosion-proof valve 200 and is threadedly connected to the threaded hole.

[0057] For example, the threaded hole on the cover body 100 does not penetrate the cover body 100 to prevent the screw from penetrating the cover body 100 , thereby preventing the liquid inside the battery from leaking through the threaded hole.

[0058] Illustratively, the explosion-proof valve 200 has a through hole, and the screw passes through the explosion-proof valve 200 through the through hole.

[0059] By adopting this technical solution, when installing the explosion-proof valve 200 on the cover body 100, one only needs to place the explosion-proof valve 200 in the accommodating cavity 110 and then secure it with screws. When the explosion-proof valve 200 needs to be replaced, the screws can be removed to remove the explosion-proof valve 200. This makes it easy for workers to install and remove the explosion-proof valve 200.

[0060] Compared with the prior art, the explosion-proof valve 200 is welded to the cover body 100. When the explosion-proof valve 200 is welded to the cover body 100, the explosion-proof valve 200 and the cover body 100 may become partially granulated due to welding. During the use of the battery, the granulated parts of the cover body 100 and the explosion-proof valve 200 may fall into the interior of the battery, thereby causing damage to the battery. The present application uses screws to connect the explosion-proof valve 200 and the cover body 100, reducing the risk of metal foreign matter entering the interior of the battery, thereby improving the service life of the battery.

[0061] Figure 5 A schematic structural diagram of an explosion-proof valve embodied in a cover assembly of a battery provided in an embodiment of the present application.

[0062] In some embodiments, reference Figure 4 and Figure 5 The explosion-proof valve 200 has at least two connecting parts 210 on its peripheral side, and at least two connecting members 300 are provided. Each connecting member 300 is provided in a one-to-one correspondence with each connecting part 210, and the connecting part 210 is detachably connected to the cover body 100 through the connecting member 300.

[0063] Exemplarily, there are four connecting parts 210 and four connecting members 300, and the four connecting parts 210 are respectively located on the peripheral sides of the explosion-proof valve 200. When the explosion-proof valve 200 is installed on the cover body 100, the four connecting members 300 respectively connect the four connecting parts 210 to the cover body 100, ensuring the stability of the explosion-proof valve 200 installed on the cover body 100.

[0064] Illustratively, the connecting portion 210 is a connecting piece, and the connecting piece and the explosion-proof valve 200 are integrally formed to reduce the manufacturing cost of the explosion-proof valve 200 .

[0065] Exemplarily, the connecting portion 210 has a through hole, and the through hole has a thread groove. The connecting portion 210 is threadably connected to the screw through the thread groove to improve the stability of the connection between the connecting portion 210 and the screw.

[0066] By adopting the above technical solution and providing the connecting portion 210 , the explosion-proof valve 200 is detachably connected to the cover body 100 via the connecting portion 210 and the connecting piece 300 , thereby improving the stability of the explosion-proof valve 200 installed on the cover body 100 .

[0067] Moreover, the provision of the connecting portion 210 increases the distance between the connecting piece 300 and the notch in the explosion-proof valve 200, reduces the stress generated on the explosion-proof valve 200 itself when the connecting piece 300 is connected to the explosion-proof valve 200, and avoids damage to the function of the explosion-proof valve 200 itself caused by the connection of the connecting piece 300 to the explosion-proof valve 200.

[0068] In some embodiments, reference Figure 2 The cover body 100 has at least two clearance grooves 120 on the peripheral side of the accommodating cavity 110 , and each connecting portion 210 is respectively embedded in each clearance groove 120 .

[0069] Exemplarily, four of the clearance grooves 120 and the connecting portion 210 are provided. The four clearance grooves 120 are evenly spaced and arranged on the circumference of the accommodating cavity 110 , and the connecting portion 210 is completely embedded in the clearance grooves 120 .

[0070] By adopting the above technical solution, by setting the clearance groove 120, the connecting part 210 is embedded in the clearance groove 120. After the explosion-proof valve 200 is installed on the cover body 100, the upper surface of the cover body 100 is in a flat state to prevent the connecting part 210 from protruding from the cover body 100.

[0071] In some embodiments, reference Figure 4 The battery cover assembly further includes a sealing ring 400 , which is disposed between the bottom surface of the explosion-proof valve 200 and the accommodating chamber 110 . The sealing ring 400 is configured to seal the explosion-proof valve 200 and the accommodating chamber 110 .

[0072] For example, the sealing ring 400 may be an O-shaped structure, and the material of the sealing ring 400 may be fluororubber.

[0073] Exemplarily, the accommodating chamber 110 is stepped, and the sealing ring 400 abuts against the step of the accommodating chamber 110 . After the explosion-proof valve 200 is placed in the accommodating chamber 110 , the explosion-proof valve 200 squeezes the sealing ring 400 against the step of the accommodating chamber 110 .

[0074] By adopting the above technical solution and providing the sealing ring 400, when the explosion-proof valve 200 is installed in the accommodating cavity 110, the sealing ring 400 is first placed in the accommodating cavity 110, and then the explosion-proof valve 200 is installed, so that the sealing ring 400 is located between the accommodating cavity 110 and the explosion-proof valve 200, thereby ensuring the sealing of the explosion-proof valve 200 after being installed in the accommodating cavity 110, and preventing the liquid inside the battery from leaking through the accommodating cavity 110.

[0075] In some embodiments, reference Figure 4 The bottom surface of the cover body 100 has an annular boss 130 , and the annular boss 130 surrounds the accommodating cavity 110 .

[0076] Illustratively, the annular boss 130 is integrally formed on the bottom surface of the cover body 100 .

[0077] Exemplarily, the connecting member 300 is a screw, and the annular boss 130 is located directly below the screw. When the screw is threadedly connected to the cover body 100, the screw does not penetrate into the annular boss 130, so as to improve the structural strength of the cover body 100 at the screw.

[0078] By adopting the above technical solution and providing the annular boss 130 , the structural strength of the cover body 100 at the accommodating cavity 110 can be improved.

[0079] In some embodiments, reference Figure 2 The battery cover assembly further includes a protective member 500 , which is mounted on the explosion-proof valve 200 . The protective member 500 is configured to protect the surface of the explosion-proof valve 200 .

[0080] The protective member 500 is located on a surface of the explosion-proof valve 200 facing away from the cover body 100 .

[0081] Exemplarily, the protective member 500 is a protective film made of PET, and a small circular hole is opened in the center of the protective film. When the air pressure inside the battery is too high and the notch in the explosion-proof valve 200 bursts, the gas inside the battery is quickly discharged through the explosion-proof valve 200 and the small circular hole in the protective member 500 in turn.

[0082] By adopting the above technical solution and providing the protective member 500 , the surface of the explosion-proof valve 200 can be protected.

[0083] In some embodiments, reference Figure 2 The battery cover assembly also includes a pole 600, a lower plastic plate 800 and an upper plastic plate 700.

[0084] The pole 600 is connected to the cover body 100 and is used to be connected to a tab in the battery.

[0085] The lower plastic plate 800 is disposed below the cover body 100 , and the upper plastic plate 700 is disposed above the cover body 100 .

[0086] For example, the pole 600 is made of AL alloy and is mainly used to connect the tabs in the battery. It plays the role of conducting electrons during the use of the battery. The diameter of the pole 600 is defined according to the battery overcurrent size. Under normal circumstances, the overcurrent area of ​​the pole 600 is less than or equal to 6A / mm 2 .

[0087] For example, the upper plastic plate 700 and the lower plastic plate 800 are both made of PP material, and their main functions are insulation and structural support.

[0088] Exemplarily, the cover plate assembly of the battery also includes a rivet, and the pole 600 is connected to the cover body 100 through the rivet. The welding part includes a rivet rod and a rivet block. One end of the rivet rod is connected to the pole 600, and the other end passes through the lower plastic plate 800, the cover body 100 and the upper plastic plate 700 respectively. The rivet block is arranged on the upper plastic plate 700 and is connected to the other end of the rivet rod.

[0089] By adopting the above technical solution, by providing a pole 600 for connecting the pole lugs in the battery, and by providing a lower plastic plate 800 and an upper plastic plate 700, not only the cover body 100 and the battery are insulated, but also the structural strength of the cover body 100 is improved.

[0090] In some embodiments, reference Figure 2 This assembly of the battery further includes a sealing ring 900 , which is disposed between the pole 600 and the cover body 100 .

[0091] For example, the sealing ring 900 may be an O-ring, and the outer layer of the sealing ring 900 may be fluororubber.

[0092] Exemplarily, the pole 600 is installed on the cover body 100 through a rivet rod and a rivet block. The rivet rod passes through the lower plastic plate 800, the cover body 100 and the upper plastic plate 700. The sealing ring 400 is sleeved on the rivet rod to ensure a sealed connection between the rivet rod and the lower plastic plate 800.

[0093] By adopting the above technical solution and providing the sealing ring 900 , the sealing of the electrode 600 installed on the cover body 100 is ensured, thereby preventing the liquid inside the battery from leaking at the connection between the electrode 600 and the cover body 100 .

[0094] An embodiment of the present application further discloses a battery, comprising a battery body and a cover assembly of the battery according to any one of the above embodiments, arranged on the battery body.

[0095] The structure and principle of the battery cover assembly have been clearly explained in the above embodiments and will not be elaborated here one by one.

[0096] By adopting the above technical solution, after the battery is used for a long time, the explosion-proof valve 200 may cause metal creep and metal fatigue problems. At this time, the explosion-proof valve 200 can be disassembled by removing the connecting piece 300 and replaced with a new explosion-proof valve 200, thereby ensuring the normal operation of the battery. Moreover, after the explosion-proof valve 200 is disassembled, the electrolyte can be replenished into the battery, thereby improving the service life of the battery.

[0097] Compared with the prior art, the explosion-proof valve 200 is welded to the cover body 100. When the explosion-proof valve 200 is welded to the cover body 100, the explosion-proof valve 200 and the cover body 100 may become partially granulated due to welding. During the use of the battery, the granulated parts of the cover body 100 and the explosion-proof valve 200 may fall into the interior of the battery, thereby causing damage to the battery. The present application uses a connector 300 to connect the explosion-proof valve 200 and the cover body 100, reducing the risk of metal foreign matter entering the interior of the battery, thereby improving the service life of the battery.

[0098] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0099] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0100] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0101] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0102] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover assembly, characterized in that: It includes a cover body, an explosion-proof valve and a connecting piece; The cover body is used to be installed on the battery housing. The cover body is provided with a receiving cavity. The explosion-proof valve is embedded in the receiving cavity. The explosion-proof valve is detachably connected to the cover body through the connecting piece.

2. The battery cover assembly according to claim 1, characterized in that: The connecting piece is a screw, and the cover body is provided with a threaded hole. The screw passes through the explosion-proof valve and is threadedly connected with the threaded hole.

3. The battery cover assembly according to claim 2, characterized in that: The explosion-proof valve has at least two connecting parts on its circumferential side, and at least two connecting members are provided, each of the connecting members is provided in one-to-one correspondence with each of the connecting parts, and the connecting parts are detachably connected to the cover body through the connecting members.

4. The battery cover assembly according to claim 3, characterized in that: The cover body has at least two clearance grooves on the peripheral side of the accommodating cavity, and each of the connecting parts is respectively embedded in each of the clearance grooves.

5. The battery cover assembly according to any one of claims 1 to 4, characterized in that: It also includes a sealing ring, which is arranged between the bottom surface of the explosion-proof valve and the accommodating chamber, and is configured to seal the explosion-proof valve and the accommodating chamber.

6. The battery cover assembly according to any one of claims 1 to 4, characterized in that: The bottom surface of the cover body is provided with an annular boss, and the annular boss surrounds the accommodating cavity.

7. The battery cover assembly according to any one of claims 1 to 4, characterized in that: Also included is a protective member, which is mounted on the explosion-proof valve and is configured to protect a surface of the explosion-proof valve.

8. The battery cover assembly according to any one of claims 1 to 4, characterized in that: It also includes a pole, a lower plastic plate and an upper plastic plate; The pole is connected to the cover body, and the pole is used to be connected to the pole lug in the battery; The lower plastic plate is arranged below the cover body, and the upper plastic plate is arranged above the cover body.

9. The battery cover assembly according to claim 8, characterized in that: A sealing ring is also included, and the sealing ring is arranged between the pole and the cover body.

10. A battery, characterized in that: A battery cover assembly comprising a battery body and the battery cover assembly according to any one of claims 1 to 9 arranged on the battery body.

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