Battery cover plate, battery and battery box

Abstract

The utility model relates to a battery cover plate, a battery and a battery box, the battery cover plate comprises a cover plate, a pole, a support sealing assembly and a fixing assembly, the cover plate is provided with at least one fixing groove, and the groove bottom of the fixing groove is provided with a connecting hole; the pole is arranged in the fixing groove; the supporting and sealing assembly comprises a protective ring body and a sealing ring, the protective ring body and the sealing ring are both arranged in the fixing groove, the protective ring body and the sealing ring both abut against the bottom of the pole and the groove bottom of the fixing groove respectively, the protective ring body is arranged outside the connecting hole in a surrounding mode, and the sealing ring is arranged outside the protective ring body in a surrounding mode; the fixing assembly is arranged on the cover plate and abuts against the pole. Therefore, the stability of the compression amount of the sealing ring is ensured, namely, the sealing effect is ensured, and the use safety is improved; and furthermore, electrolyte is prevented from corroding the sealing ring.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery cover, a battery and a battery box. Background Art

[0002] The battery cover is a key part of the battery assembly, which mainly plays the role of sealing and protecting the internal structure of the battery. However, there are still some problems in the design and use of the battery cover in the related art, especially in the sealing performance.

[0003] Traditional battery covers usually use sealing rings to achieve sealing to prevent electrolyte leakage. However, this method has some significant disadvantages in practical applications. First, when the battery cover is subjected to external force, the sealing ring may be over-compressed or under-compressed. Over-compression can cause the sealing ring to deform or even damage, thereby reducing its sealing performance; while insufficient compression may prevent the sealing ring from fitting tightly, which will also lead to poor sealing. Both situations may cause electrolyte leakage, which will have a serious impact on the performance and safety of the battery.

[0004] Secondly, one side of the sealing ring is directly exposed to the electrolyte environment. Long-term contact with the electrolyte can easily lead to corrosion of the sealing ring material. The electrolyte is usually highly corrosive and can gradually corrode the sealing ring, causing it to lose elasticity and then crack or break. Once the sealing ring is damaged, the electrolyte will seep out through the damaged area, which not only reduces the service life of the battery, but may also pollute the external environment. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a battery cover, a battery and a battery box, which can solve the problem that the sealing performance of the sealing ring decreases due to excessive compression, insufficient compression and electrolyte corrosion.

[0006] The first aspect of the utility model provides a battery cover, which includes:

[0007] A cover plate, wherein at least one fixing groove is formed on the cover plate, and a connecting hole is formed at the bottom of the fixing groove;

[0008] A pole, wherein the pole is arranged in the fixing groove;

[0009] A support seal assembly, the support seal assembly comprising a protective ring body and a sealing ring, the protective ring body and the sealing ring are both arranged in the fixing groove, the protective ring body and the sealing ring are respectively supported on the bottom of the pole and the bottom of the fixing groove, the protective ring body is arranged outside the connecting hole, and the sealing ring is arranged outside the protective ring body; and

[0010] A fixing assembly is arranged on the cover plate and abuts against the pole.

[0011] Preferably, the support seal assembly further comprises a support ring body, and the support ring body is arranged in the fixing groove;

[0012] The supporting ring body is respectively supported on the bottom of the pole and the bottom of the fixing groove.

[0013] Preferably, a first positioning groove is further formed at the bottom of the fixing groove, and at least a portion of the protective ring body is disposed in the first positioning groove; and / or

[0014] A second positioning groove is formed at the bottom of the pole, and at least a portion of the protective ring body is disposed in the second positioning groove.

[0015] Preferably, the cross section of the protective ring body is O-shaped, rectangular, L-shaped, T-shaped, cross-shaped or irregular.

[0016] Preferably, a relief step is provided on the support ring body, and the bottom peripheral edge of the pole is supported on the relief step.

[0017] Preferably, a first sealing groove is formed at the bottom of the pole, and the sealing ring is located in the first sealing groove; and / or

[0018] A second sealing groove is also formed at the bottom of the fixing groove, and the sealing ring is located in the second sealing groove.

[0019] Preferably, the fixing assembly includes a pull ring and an injection molded part, the pull ring is arranged on the peripheral groove wall in the fixing groove, the pull ring, the support ring body and the side wall of the pole jointly define a molding interval, the injection molded part is injection molded in the molding interval, and the injection molded part is respectively abutted against the pull ring and the pole.

[0020] Preferably, the injection molded part extends outward from the molding interval and covers the outer side surface of the pull ring, and the injection molded part is connected to the cover plate.

[0021] Preferably, the protective ring body is provided with an anti-corrosion coating at least on the side surface adjacent to the connecting hole.

[0022] The second aspect of the utility model further provides a battery, which comprises a box body and the battery cover plate described in any one of the above technical solutions, wherein the battery cover plate is arranged on the box body.

[0023] The third aspect of the utility model further provides a battery box, wherein a receiving cavity is provided in the battery box, and the battery described in the above scheme is arranged in the receiving cavity.

[0024] The implementation of this utility model has the following beneficial effects:

[0025] The utility model relates to a battery cover, a battery and a battery box. On the battery cover, a protective ring body is provided so that the bottom of the pole can be supported, thereby preventing the pole from being compressed by force on the sealing ring and preventing the compression of the sealing ring from increasing; a fixing component is provided so that the top of the pole can be supported, thereby preventing the pole from being compressed by force and moving away from the sealing ring and preventing the compression of the sealing ring from decreasing; in this way, the stability of the compression of the sealing ring is effectively guaranteed, that is, the sealing effect is guaranteed, electrolyte leakage is prevented, and the use safety is improved;

[0026] Furthermore, by providing a protective ring body between the sealing ring and the connecting hole, the electrolyte overflowing through the connecting hole can be blocked by the protective ring body, preventing the electrolyte from corroding the sealing ring, thereby improving the durability of the product and further ensuring the sealing performance of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0028] Figure 1 It is a schematic diagram of the structure of the battery cover in some embodiments of the utility model;

[0029] Figure 2 From another perspective Figure 1 The structural schematic diagram of the battery cover shown;

[0030] Figure 3 It is a schematic diagram of the internal structure of the battery cover in some embodiments of the utility model;

[0031] Figure 4 yes Figure 3 An enlarged view of the battery cover at point A is shown.

[0032] Description of Figure Numbers:

[0033] 1-cover plate; 11-fixing groove; 111-first positioning groove; 12-connecting hole

[0034] 2-pole; 21-first sealing groove;

[0035] 3-support sealing assembly; 31-protection ring body; 32-support ring body; 321-avoidance step; 33 sealing ring;

[0036] 4-fixing component; 41-pull ring; 42-injection molded part; 43-molding interval. DETAILED DESCRIPTION

[0037] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0038] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] Figure 1 The battery cover 10 in some embodiments of the utility model is shown. The battery cover 10 is used for applying to the battery to seal and protect the internal components of the battery, and also to conduct electricity. Figures 1 to 4As shown, the battery cover 10 includes a cover 1, a pole 2, a support sealing assembly 3 and a fixing assembly 4. The cover 1 supports the remaining components. The pole 2 transmits electrical energy. The support sealing assembly 3 supports the pole 2 and seals the matching position of the pole 2 and the cover 1. The fixing assembly 4 and the support sealing assembly 3 can limit and fix the pole 2 from two opposite directions.

[0042] like Figures 1 to 4 As shown, at least one fixing groove 11 is formed on the cover plate 1 , and a connecting hole 12 is formed at the bottom of the fixing groove 11 .

[0043] It can be understood that at least one fixing groove 11 is provided on the cover plate 1, and the fixing groove 11 is used to position and fix the pole 2. A connection hole 12 is further provided at the bottom of the fixing groove 11, and the connection hole 12 is used to connect the pole 2 inside the battery, and further electrically connect to the outside through the pole 2.

[0044] like Figures 1 to 3 As shown, the pole 2 is arranged in the fixing slot 11 .

[0045] It can be understood that the pole 2 plays a role in transmitting electrical energy.

[0046] like Figures 1 to 4 As shown, the supporting sealing assembly 3 includes a protective ring body 31 and a sealing ring 33, both of which are arranged in the fixing groove 11, and the protective ring body 31 and the sealing ring 33 are respectively supported on the bottom of the pole 2 and the bottom of the fixing groove 11, and the protective ring body 31 is placed outside the connecting hole 12, and the sealing ring 33 is placed outside the protective ring body 31.

[0047] It can be understood that the protective ring body 31 is disposed outside the connection hole 12 to prevent the electrolyte from leaking outward through the connection hole 12, thereby preventing the electrolyte from contacting the sealing ring 33. The sealing ring 33 is located outside the protective ring body 31, that is, the sealing ring 33 is located outside the protective ring body 31, which prevents the electrolyte from leaking from the gap between the pole 2 and the fixing groove 11.

[0048] like Figures 1 to 4 As shown, the fixing assembly 4 is disposed on the cover plate 1 and abuts against the pole 2 .

[0049] It can be understood that the fixing assembly 4 is arranged on the cover plate 1 and around the periphery of the fixing groove 11. It cooperates with the supporting sealing assembly 3 to clamp and fix the pole 2 from both sides to ensure the stability and safety of the pole 2 during battery operation.

[0050] In summary, on the one hand, when the internal electrolyte leaks out through the connecting hole 12, the electrolyte will be preferentially blocked by the protective ring body 31, preventing the electrolyte from further leaking into the sealing ring 33 after passing through the connecting hole 12, thereby preventing the electrolyte from corroding the sealing ring, thereby ensuring the sealing performance of the sealing ring 33 and improving the durability of the product.

[0051] On the other hand, when the pole 2 is subjected to a force from top to bottom, the pole 2 will be pressed against the protective ring body 31, that is, the force will be concentrated on the protective ring body 31 rather than the sealing ring 33, thereby preventing the sealing ring 33 from being damaged due to the force, thereby ensuring the position stability of the pole 2 in the fixing groove 11 and avoiding excessive compression of the sealing ring 33.

[0052] In other aspects, when the pole 2 is subjected to a force acting from bottom to top, the movable gap of the pole 2 in the direction away from the sealing ring 33 is limited by the fixing assembly 4, and the fixing assembly 4 is fixedly arranged in the fixing groove 11, so that the position of the pole 2 can be kept fixed, avoiding the reduction of the compression of the sealing ring 33 due to the distance of the pole 2, thereby ensuring the sealing performance of the sealing ring 33.

[0053] It should be noted that the force from top to bottom or from bottom to top includes the force directly perpendicular to the upper surface of the pole 2, and also includes the force applied in other directions but with a component in that direction. Of course, even if the pole 2 is subjected to a force in an inclined direction, the movable gap of the pole 2 in the fixing groove 11 is also limited by the supporting sealing component 3 and the fixing component 4, which can also avoid the position stability of the pole 2 in the horizontal direction, and prevent the sealing effect of the sealing ring 33 from being reduced or even disappearing due to the movement of the pole 2.

[0054] like Figures 1 to 4 As shown, the support seal assembly further includes a support ring 32 , which is disposed in the fixing groove 11 ; the support ring 32 is supported on the bottom of the pole 2 and the bottom of the fixing groove 11 .

[0055] It can be understood that the support ring 32 plays a supporting and positioning role to ensure the stability of the pole 2 in the fixing groove 11. On the one hand, the support ring 32 can work together with the protective ring 31 to bear the force acting on the pole 2 from top to bottom, further preventing the sealing ring 33 from being damaged by the force. On the other hand, it can also prevent the pole 2 from moving towards the direction close to the sealing ring 33 due to the force, further avoiding excessive compression of the sealing ring 33.

[0056] Of course, the support ring body 32 can be further configured to cooperate with the outer edge of the pole 2, so that when the outer edge of the support ring body 32 has been limited in the fixing groove 11, the inner edge of the support ring body 32 can also limit the pole 2, thereby preventing the pole 2 from moving along the circumferential direction, further improving the setting stability of the pole 2.

[0057] like Figure 3 and Figure 4 As shown, in some embodiments of the battery cover 10 , a first positioning groove 111 is further defined at the bottom of the fixing groove 11 , and at least a portion of the protective ring body 31 is disposed in the first positioning groove 111 .

[0058] It can be understood that the first positioning groove 111 is used to position the protection ring body 31, prevent the protection ring body 31 from shifting during the production process, and ensure the production yield. At the same time, it also prevents the protection ring body 31 from shifting due to excessive internal pressure of the battery during actual use, and ensures the electrolyte protection effect of the protection ring body 31.

[0059] In some embodiments of the battery cover 10 , a second positioning groove is formed at the bottom of the pole 2 , and at least a portion of the protective ring body 31 is disposed in the second positioning groove.

[0060] It can be understood that the second positioning groove is used to position the protection ring body 31 to prevent the protection ring body 31 from being offset, thereby ensuring the protection ring body 31 has an electrolyte barrier effect.

[0061] In some embodiments of the battery cover 10, a first positioning groove 111 is further provided at the bottom of the fixing groove 11, and at least a portion of the protective ring body 31 is disposed in the first positioning groove 111, and a second positioning groove is provided at the bottom of the pole 2, and at least a portion of the protective ring body 31 is disposed in the second positioning groove.

[0062] It can be understood that the protection ring body 31 is positioned by the first positioning groove 11 and the second positioning groove at the same time, which can greatly improve the position stability of the protection ring body 31 and effectively ensure the protection effect of the protection ring body 31. At the same time, if the protection ring body 31 is made of some hard materials, after the protection ring body 31 is assembled in the fixing groove 11, the pole 2 can also be positioned by the protection ring body 31.

[0063] like Figure 4 As shown, in some embodiments of the battery cover 10, the cross-section of the protective ring body 31 is O-shaped, rectangular, L-shaped, T-shaped, cross-shaped or irregular.

[0064] It can be understood that the irregular shape can be configured as the protective ring body 31 including a main annular portion with a rectangular cross-section, the main annular portion protrudes outward to form at least one flange, and the protective ring body 31 can be positioned by matching the flange with the external groove body.

[0065] like Figure 3 and Figure 4 As shown, in some embodiments of the battery cover 10 , a relief step 321 is provided on the support ring 32 , and the bottom circumference of the pole 2 is supported on the relief step 321 .

[0066] It can be understood that the arrangement of the avoidance step 321 allows the support ring body 32 to be pre-mounted on the pole 2 during the assembly process, thereby improving assembly convenience. The support ring body 32 can also be assembled in advance, and then the pole 2 can be positioned and installed through the avoidance step 321.

[0067] like Figure 2 and Figure 3 As shown, in some embodiments of the battery cover 10 , a first sealing groove 21 is formed at the bottom of the pole 2 , and the sealing ring 33 is located in the first sealing groove 21 .

[0068] It can be understood that the provision of the first sealing groove 21 increases the matching area between the sealing ring 33 and the pole 2 , thereby improving the sealing performance of the contact position between the sealing ring 33 and the pole 2 .

[0069] In some embodiments of the battery cover 10 , a second sealing groove is further formed at the bottom of the fixing groove 11 , and the sealing ring 33 is located in the second sealing groove.

[0070] It can be understood that the opening of the second sealing groove increases the contact area between the sealing ring 33 and the bottom of the fixing groove 11 , thereby improving the sealing performance between the sealing ring 33 and the bottom of the fixing groove 11 .

[0071] In some embodiments of the battery cover 10 , a first sealing groove 21 is formed at the bottom of the pole 2 , and the sealing ring 33 is located in the first sealing groove 21 . A second sealing groove is also formed at the bottom of the fixing groove 11 , and the sealing ring 33 is located in the second sealing groove.

[0072] It can be understood that in this embodiment, the first sealing groove 21 and the second sealing groove are provided simultaneously, which can enhance the sealing performance of the sealing ring 33 to the pole 2 and the bottom of the fixing groove 11, and further improve the sealing and leakproof performance of the product.

[0073] like Figures 1 to 4 As shown, in some embodiments of the battery cover 10, the fixing assembly 4 includes a pull ring 41 and an injection molded part 42, the pull ring 41 is arranged on the peripheral groove wall in the fixing groove 11, the pull ring 41, the support ring body 32 and the side wall of the pole 2 jointly define a molding interval 43, and the injection molded part 42 is injection molded and arranged in the molding interval 43 (the molding interval 43 is shown in FIG. Figure 4 ), the injection molded part 42 is respectively supported on the pull ring 41 and the pole 2.

[0074] It can be understood that the circumference of the pull ring 41 can be configured to match the groove wall profile of the fixing groove 11, so that after the pull ring 41 is placed in the fixing groove 11, the pull ring 41 will fit the groove wall profile of the fixing groove 11. The pull ring 41 can be fixed in the fixing groove 11 by welding, riveting, bonding, clamping, screwing or welding. The injection molded part 42 is used to fill the matching gap between the pole 2 and the pull ring 41.

[0075] Among them, since the injection molded part 42 is injection molded in the molding interval 43, various matching gaps between the pole 2 and the pull ring 41 will be fully filled, and the molded injection molded part 42 can also limit the position of the pole 2 and support it from all directions.

[0076] It should be noted that, in the process of assembling and generating in the correct order, after the molding interval 43 is defined, it is sent into the injection mold accordingly, and then the rubber material is injected into the molding interval 43 by injection molding; then, the rubber material is cooled and molded to form the injection molded part 42. Before the injection molding of the injection molded part 42, a pre-tightening force can be applied to the pole 2 to achieve pre-tightening and holding of the sealing ring 33, so that the sealing ring 33 can maintain the holding amount when the sealing performance is optimal as much as possible, thereby further improving the sealing protection of the product.

[0077] like Figure 4 As shown, in some embodiments of the battery cover 10 , the injection molded part 42 extends outward from the molding space 43 and covers the outer surface of the pull ring 41 , and the injection molded part 42 is connected to the cover 1 .

[0078] It can be understood that configuring the injection molded part 42 to directly cover the pull ring 41 can, on the one hand, provide sufficient protection for the pull ring 41, and on the other hand, can also increase the contact area between the injection molded part 42 and the cover plate 1, thereby preventing the injection molded part 42 from being damaged by stress concentration due to too small a contact area with the outside when a force is applied.

[0079] In some embodiments of the battery cover 10 , the protective ring body 31 is provided with an anti-corrosion coating at least on the side surface adjacent to the connecting hole 12 .

[0080] It can be understood that the provision of the anti-corrosion coating can improve the durability of the protective ring body 31 and further improve the durability of the product.

[0081] The battery of the utility model can be used for charging and discharging. The battery comprises a box body and a battery cover plate 10, wherein the battery cover plate 10 is arranged on the box body.

[0082] It can be understood that the box body has a loading function and is used to load the battery cells corresponding to the battery field, namely, electrolyte, etc.

[0083] The battery box of the utility model can be applied to various fields of electricity consumption or charging. A accommodating cavity is provided in the battery box, and batteries are arranged in the accommodating cavity. The number of batteries in the battery box can be configured to be one or more, which can be adjusted according to application requirements and design needs.

[0084] The implementation of this utility model has the following beneficial effects:

[0085] The utility model relates to a battery cover, a battery and a battery box. On the battery cover, a protective ring body is provided so that the bottom of the pole can be supported, thereby preventing the pole from being compressed by force on the sealing ring and preventing the compression of the sealing ring from increasing; a fixing component is provided so that the top of the pole can be supported, thereby preventing the pole from being compressed by force and moving away from the sealing ring and preventing the compression of the sealing ring from decreasing; in this way, the stability of the compression of the sealing ring is effectively guaranteed, that is, the sealing effect is guaranteed, electrolyte leakage is prevented, and the use safety is improved;

[0086] Furthermore, by providing a protective ring body between the sealing ring and the connecting hole, the electrolyte overflowing through the connecting hole can be blocked by the protective ring body, preventing the electrolyte from corroding the sealing ring, thereby improving the durability of the product and further ensuring the sealing performance of the sealing ring.

[0087] The scheme of the utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required for the utility model. In addition, it can be understood that the steps in the method of the embodiment of the utility model can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the utility model can be merged, divided and deleted according to actual needs.

[0088] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A battery cover, characterized in that: include: A cover plate (1), wherein at least one fixing groove (11) is formed on the cover plate (1), and a connecting hole (12) is formed at the bottom of the fixing groove (11); A pole (2), the pole (2) being arranged in the fixing groove (11); A support sealing assembly (3), the support sealing assembly (3) comprising a protective ring body (31) and a sealing ring (33), the protective ring body (31) and the sealing ring (33) are both arranged in the fixing groove (11), the protective ring body (31) and the sealing ring (33) are both supported on the bottom of the pole (2) and the bottom of the fixing groove (11), respectively, the protective ring body (31) is arranged outside the connecting hole (12), and the sealing ring (33) is arranged outside the protective ring body (31); and A fixing component (4), wherein the fixing component (4) is arranged on the cover plate (1) and abuts against the pole (2).

2. The battery cover according to claim 1, characterized in that: The support seal assembly (3) further comprises a support ring body (32), wherein the support ring body (32) is arranged in the fixing groove (11); The supporting ring body (32) is respectively supported on the bottom of the pole (2) and the bottom of the fixing groove (11).

3. The battery cover according to claim 1 or 2, characterized in that: The bottom of the fixing groove (11) is further provided with a first positioning groove (111), and at least a portion of the protective ring body (31) is arranged in the first positioning groove (111); and / or A second positioning groove is provided at the bottom of the pole (2), and at least a portion of the protection ring body (31) is arranged in the second positioning groove.

4. The battery cover according to claim 2, characterized in that: The support ring body (32) is provided with a relief step, and the bottom peripheral edge of the pole (2) is supported on the relief step.

5. The battery cover according to claim 2, characterized in that: The fixing assembly (4) comprises a pull ring (41) and an injection molded part (42); the pull ring (41) is arranged on the peripheral groove wall in the fixing groove (11); the pull ring (41), the support ring body and the side wall of the pole (2) jointly define a molding interval (43); the injection molded part (42) is injection molded in the molding interval (43); and the injection molded part (42) is respectively abutted against the pull ring (41) and the pole (2).

6. The battery cover according to claim 5, characterized in that: The injection molded part (42) extends outward from the molding spacer (43) and covers the outer surface of the pull ring (41), and the injection molded part (42) is connected to the cover plate (1).

7. The battery cover according to claim 1, characterized in that: A first sealing groove (21) is provided at the bottom of the pole (2), and the sealing ring (33) is located in the first sealing groove (21); and / or The bottom of the fixing groove (11) is also provided with a second sealing groove, and the sealing ring (33) is located in the second sealing groove.

8. The battery cover according to claim 1, characterized in that: The protective ring body (31) is provided with an anti-corrosion coating at least on the side surface adjacent to the connecting hole (12).

9. A battery, characterized in that: It comprises a box body and a battery cover plate as claimed in any one of claims 1 to 8, wherein the battery cover plate (1) is arranged on the box body.

10. A battery box, characterized in that: The battery box is provided with a receiving cavity, and a plurality of batteries according to claim 8 are arranged in the receiving cavity.

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