Battery top cover capable of repeatedly supplementing liquid and battery

Abstract

The utility model belongs to the technical field of battery structures, and discloses a battery top cover capable of repeatedly supplementing liquid and a battery. The battery top cover comprises a top cover body, a sealing reinforcing piece and a sealing connecting piece, a connecting part is arranged on one side, far away from a battery cell, of the top cover body, the sealing reinforcing piece is fixedly connected to the connecting part and is provided with a communicating hole communicated with a liquid injection hole, and the sealing connecting piece can separately seal the communicating hole. By additionally arranging the sealing reinforcing piece and sealing the communicating hole of the sealing reinforcing piece through the sealing connecting piece, the sealing strength can be guaranteed during normal use, and electrolyte leakage is prevented. And during separation, liquid supplementing operation can be carried out through the communicating hole and the liquid injection hole. After the liquid supplementing operation is completed, the sealing connecting piece can be installed on the sealing reinforcing piece again, so that the liquid injection hole is sealed again. Therefore, the battery top cover not only can realize repeated liquid supplementing operation, but also is simple and quick to operate and simple in overall structure, and has economical liquid supplementing cost and relatively high liquid supplementing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of battery structure, in particular to a battery top cover and a battery capable of repeatedly replenishing liquid. Background Art

[0002] In existing batteries, the sealing of the injection hole of the battery top cover is achieved by using a sealing pin and an interference fit between the sealing pin and the injection hole. For example, Chinese invention patent application number 201610332924.0 discloses a battery top cover, in which a rubber part and a sealing pin are used to reliably seal the injection hole.

[0003] During the operation of the battery, the electrolyte may be consumed due to evaporation or electrolytic reaction, resulting in a drop in the liquid level. The reduction of electrolyte will directly affect the conductivity and capacity of the battery, and thus affect the overall performance of the battery. Regularly replenishing the electrolyte through the injection hole can maintain the optimal working state of the battery. Although the above-mentioned battery top cover can seal the injection hole, it is difficult to achieve repeated refilling operations, and the refilling cost is high.

[0004] Based on the above, there is an urgent need for a battery top cover and a battery that can be repeatedly replenished to solve the above technical problems. Utility Model Content

[0005] One purpose of the utility model is to provide a battery top cover that can be repeatedly filled with liquid, which has good sealing performance and can realize the operation of repeated filling with liquid at a low cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery cover for repeated refilling, including:

[0008] A top cover body, wherein the top cover body is provided with a liquid injection hole, and a connecting portion is provided on a side of the top cover body away from the battery core;

[0009] A sealing reinforcement member, wherein the sealing reinforcement member is fixedly connected to the connecting portion, and the sealing reinforcement member and the top cover body are sealed; the sealing reinforcement member has a connecting hole extending therethrough, and the connecting hole is connected to the liquid injection hole;

[0010] A sealing connector is detachably connected to the sealing reinforcement member, and when connected, the sealing connector can seal the communicating hole.

[0011] Preferably, the connecting portion is protrudingly disposed on the top cover body, and the connecting portion can limit the sealing reinforcement component.

[0012] Preferably, the connection portion is continuously arranged around the circumference of the sealing reinforcement member, and the connection portion is fixedly and sealingly connected to the side surface of the sealing reinforcement member.

[0013] Preferably, the connecting portion is integrally stamped and formed on the top cover body.

[0014] Preferably, the thickness of the top cover body at the inner side of the connecting portion is smaller than the thickness of the top cover body at the outer side of the connecting portion.

[0015] Preferably, the connecting portion is connected to the side surface of the sealing reinforcement member by welding.

[0016] Preferably, the sealing reinforcement member is a columnar member, the outer peripheral surface of the columnar member is fixed and sealed to the annular connecting portion, the connecting hole is arranged along the axial direction of the columnar member, the connecting hole is configured as a threaded hole, and the sealing connecting member is a sealing bolt, which is threadedly connected to the connecting hole.

[0017] Preferably, the battery top cover further comprises a sealing ring, which is sleeved on the sealing bolt, and when the sealing bolt is connected to the columnar member, the sealing ring seals and abuts between the nut portion of the sealing bolt and the end face of the columnar member.

[0018] Preferably, along a direction perpendicular to the top cover body, a sealing connection length between the sealing reinforcement member and the sealing connection member is not less than 2 mm.

[0019] The beneficial effects of the utility model are as follows: by adding a sealing reinforcement to the top cover body of the battery top cover, and using a sealing connector to seal the connecting hole of the sealing reinforcement, the sealing strength can be guaranteed when the sealing connector is fixedly connected to the sealing reinforcement to prevent leakage of the electrolyte. When the sealing connector is separated from the sealing reinforcement, the electrolyte can be injected through the connecting hole and the injection hole to complete the refilling operation. After the refilling operation is completed, the sealing connector can be installed on the sealing reinforcement again to achieve re-sealing of the injection hole. Therefore, the battery top cover can realize repeated refilling operations, and the operation is simple and quick, the overall structure is simple, and it has an economical refilling cost and a high refilling efficiency.

[0020] Another object of the present invention is to provide a battery that can be repeatedly refilled, which has good sealing performance and can achieve repeated refilling operations at a low cost.

[0021] To achieve this purpose, the utility model adopts the following technical solutions:

[0022] A battery, comprising the above-mentioned battery top cover.

[0023] The beneficial effects of the utility model are as follows: In the battery, by adding a sealing reinforcement member to the top cover body of the battery top cover, and using a sealing connector to seal the connecting hole of the sealing reinforcement member, the sealing strength can be guaranteed when the sealing connector and the sealing reinforcement member are fixedly connected to prevent leakage of the electrolyte. When the sealing connector is separated from the sealing reinforcement member, the electrolyte can be injected through the connecting hole and the injection hole to complete the refilling operation. After the refilling operation is completed, the sealing connector can be installed on the sealing reinforcement member again to achieve re-sealing of the injection hole. Therefore, the battery top cover can realize repeated refilling operations, and the operation is simple and quick, the overall structure is simple, and it has an economical refilling cost and a high refilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the battery top cover provided by the utility model;

[0025] Figure 2 It is a partial exploded view of the battery top cover provided by the utility model;

[0026] Figure 3 It is a top view of the battery top cover provided by the utility model;

[0027] Figure 4 is along Figure 3 The assembly drawing of the sealing reinforcement and the sealing connection from the middle AA perspective;

[0028] Figure 5 is along Figure 3 Exploded view of the seal reinforcement and seal connector from a medium AA perspective.

[0029] In the figure:

[0030] 1. Top cover body; 11. Liquid injection hole; 12. Connecting part;

[0031] 2. Sealing reinforcement; 21. Connecting hole;

[0032] 3. Sealing connector;

[0033] 4. Sealing ring;

[0034] 5. Remove plastic;

[0035] 6. Pole. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection 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 the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] The following is based on the attached Figure 1 To Attachment Figure 5 The utility model introduces a battery top cover and a battery capable of repeatedly replenishing liquid.

[0041] like Figures 1 to 3As shown, the battery includes a battery top cover, which includes a top cover body 1, a lower plastic 5, a pole 6 (including a positive pole and a negative pole), etc. The top cover body 1 is the main structural part of the battery top cover, and is usually made of metal materials such as aluminum to provide sufficient mechanical strength and protection. The top cover body 1 is designed with specific holes and notches for installing and fixing other components. The lower plastic 5 is located below the top cover body 1 and mainly plays the role of insulation and sealing. It is tightly combined with the top cover body 1 through injection molding or other processes to ensure the isolation of the inside of the battery from the external environment, thereby preventing electrolyte leakage and the invasion of external impurities. In addition, the lower plastic 5 can also absorb slight vibrations that may occur during the operation of the battery, which helps to protect the internal structure of the battery. The positive pole and the negative pole are key components for connecting the battery to the external circuit. They are respectively connected to the positive and negative poles inside the battery, and extend through the holes on the top cover body 1 to be electrically connected to external devices. The positive pole and the negative pole are usually made of metal materials with good conductive properties, such as copper or aluminum, to ensure that the current can be transmitted smoothly.

[0042] like Figure 4 As shown, in this embodiment, the battery top cover also includes a sealing reinforcement 2 and a sealing connector 3. Among them, the top cover body 1 is provided with a liquid injection hole 11, and a connecting portion 12 is provided on the side of the top cover body 1 away from the battery cell. The sealing reinforcement 2 is fixedly connected to the connecting portion 12, and the sealing reinforcement 2 and the top cover body 1 are sealed. The sealing reinforcement 2 has a connecting hole 21 that is arranged through, and the connecting hole 21 is connected to the liquid injection hole 11. When performing a liquid replenishment operation, the electrolyte can be supplemented into the battery through the connecting hole 21 and the liquid injection hole 11. The sealing connector 3 can be detachably connected to the sealing reinforcement 2, and when connected, the sealing connector 3 can seal the connecting hole 21, thereby preventing the electrolyte from leaking out from the liquid injection hole 11 and the connecting hole 21 during normal use.

[0043] When making a battery and injecting electrolyte for the first time, the electrolyte can be injected directly through the injection hole 11 of the top cover body 1 before installing the sealing reinforcement 2, or the electrolyte can be injected through the connecting hole 21 and the injection hole 11 after installing the sealing reinforcement 2. After the injection is completed, the sealing connector 3 is installed on the sealing reinforcement 2 to seal the connecting hole 21 to prevent the electrolyte from leaking during normal use of the battery.

[0044] When refilling is required, since the sealing connector 3 can seal the connecting hole 21 when connected, the sealing connector 3 is separated from the sealing reinforcement 2 before the refilling operation. In this way, the connecting hole 21 can be opened to provide a channel for the replenishment of the electrolyte. After separating the sealing connector 3, use a dedicated refilling device or syringe to slowly inject the electrolyte into the battery through the connecting hole 21 and the injection hole 11. When the amount of electrolyte replenishment reaches the preset standard, the sealing connector 3 needs to be reconnected to the sealing reinforcement 2 to ensure that the connecting hole 21 is resealed to prevent electrolyte leakage.

[0045] By adding a sealing reinforcement member 2 to the top cover body 1 and sealing the connecting hole 21 of the sealing reinforcement member 2 with the sealing connector 3, the sealing strength can be guaranteed when the sealing connector 3 is fixedly connected to the sealing reinforcement member 2 to prevent leakage of the electrolyte. When the sealing connector 3 is separated from the sealing reinforcement member 2, the electrolyte can be injected through the connecting hole 21 and the injection hole 11 to complete the rehydration operation. After the rehydration operation is completed, the sealing connector 3 can be installed on the sealing reinforcement member 2 again to achieve the re-sealing of the injection hole 11. Therefore, the battery top cover can realize repeated rehydration operations, and the operation is simple and fast, the overall structure is simple, and it has an economical rehydration cost and a high rehydration efficiency.

[0046] Preferably, in this embodiment, along the direction perpendicular to the top cover body 1, the sealing connection length between the sealing reinforcement 2 and the sealing connector 3 is not less than 2 mm, so as to ensure the sealing strength and prevent leakage of the electrolyte when the sealing reinforcement 2 and the sealing connector 3 are connected.

[0047] like Figure 4 , Figure 5 As shown, in this embodiment, the connection portion 12 is protrudingly arranged on the top cover body 1, and the connection portion 12 can limit the sealing reinforcement member 2. The protruding arrangement of the connection portion 12 can facilitate the process of installing the sealing reinforcement member 2 on the top cover body 1, for example, it serves as a positioning basis for the sealing reinforcement member 2 during installation, so as to facilitate manual or automatic determination of the position where the sealing reinforcement member 2 is installed on the top cover body 1, thereby facilitating the coaxial connection arrangement of the injection hole 11 and the communication hole 21.

[0048] Further, continue to refer to Figure 4 , Figure 5As shown, the connection part 12 is continuously arranged around the circumference of the sealing reinforcement 2, and the connection part 12 is fixed and sealed to the side of the sealing reinforcement 2. The connection part 12 adopts a convex structure of a closed shape such as an annular, elliptical annular, quadrilateral, pentagonal, etc., to be continuously arranged around the circumference of the sealing reinforcement 2. The sealing reinforcement 2 is arranged on the inner side of the connection part 12 and is fixed and sealed to the inner wall surface of the connection part 12. The circumferential continuous arrangement can significantly increase the connection area between the sealing reinforcement 2 and the connection part 12, thereby improving the connection strength between the sealing reinforcement 2 and the connection part 12, and improving the structural strength of the battery top cover. At the same time, the circumferential continuous arrangement can also facilitate the sealing connection between the connection part 12 and the side of the sealing reinforcement 2. Compared with only sealing the sealing reinforcement 2 and the top cover body 1 away from the side surface of the battery core, it can further prevent the leakage of electrolyte from the top cover body 1 and the sealing reinforcement 2, and ensure the performance and safety performance of the battery.

[0049] Optionally, in this embodiment, the connection portion 12 is welded to the side of the sealing reinforcement member 2 to achieve the effect of fixing and sealing. Compared with welding the sealing reinforcement member 2 to the side surface of the top cover body 1 away from the battery cell, the welding connection operation between the connection portion 12 and the side of the sealing reinforcement member 2 is more convenient, which can simplify the manufacturing process of the battery top cover, reduce the manufacturing cost, and achieve better sealing performance and connection strength.

[0050] Preferably, the thickness of the portion of the top cover body 1 located inside the connection portion 12 is less than the thickness of the portion of the top cover body 1 located outside the connection portion 12. Exemplarily, in this embodiment, the connection portion 12 is an annular protrusion structure, and the thickness of the portion of the top cover body 1 located inside the annular protrusion structure is less than the thickness of the portion of the top cover body 1 located outside the annular protrusion structure, so that the sealing connection length of the sealing reinforcement member 2 and the sealing connection member 3 can be guaranteed, and the sealing connection member 3 or the sealing reinforcement member 2 can be avoided from being too protruding, resulting in a phenomenon of reduced space utilization during battery installation.

[0051] In this embodiment, when the top cover body 1 is manufactured, the connection part 12 is integrally stamped and formed on the top cover body 1. The integral stamping method can not only form a high-strength connection part 12 and improve its structural strength, but also can simultaneously form the connection part 12 with higher efficiency and lower cost while stamping and forming the top cover body 1. At the same time, the stamping method can also conveniently control the thickness of the inner part of the top cover body 1 located at the connection part 12, making it smaller than the thickness of the outer part of the top cover body 1 located at the connection part 12, thereby avoiding the above-mentioned situation where the sealing connector 3 or the sealing reinforcement 2 is too protruding.

[0052] After the top cover body 1 is manufactured, the sealing reinforcement member 2 can be fixedly installed on the top cover body 1. In the present embodiment, the connecting portion 12 is an annular protrusion structure, and the sealing reinforcement member 2 is a columnar member. The diameter of the columnar member is equal to the inner diameter of the annular protrusion structure, so that it is convenient to fix and seal the outer peripheral surface of the columnar member with the annular connecting portion 12 during connection. The connecting hole 21 is arranged along the axial direction of the columnar member, and is coaxially arranged with the injection hole 11 when connected, so as to reduce the resistance when injecting the electrolyte. The connecting hole 21 is a threaded hole, and the sealing connector 3 is a sealing bolt, which is threadedly connected to the connecting hole 21 to facilitate detachable connection.

[0053] When assembling the battery top cover, it is only necessary to insert the columnar member into the annular protrusion structure to weld and connect. The insertion process does not need to consider the direction of the columnar member, which is convenient and quick, and there will be no installation direction error. When sealing, it is only necessary to screw the sealing bolt into the connecting hole 21. When liquid injection is required, it is only necessary to screw the sealing bolt out of the connecting hole 21, and the inside of the battery can be connected to the outside through the liquid injection hole 11 and the connecting hole 21, thereby realizing the injection of electrolyte.

[0054] Preferably, in this embodiment, the battery top cover further includes a sealing ring 4, which is sleeved on the sealing bolt. When the sealing bolt is connected to the columnar member, the sealing ring 4 seals and abuts between the nut portion of the sealing bolt and the end face of the columnar member to achieve sealing between the sealing bolt and the columnar member. Exemplarily, after the initial injection of electrolyte or the replenishment of electrolyte, the sealing bolt is screwed into the threaded hole so that the sealing ring 4 is compressed to a preset compression amount, which can achieve a better sealing effect and prevent leakage of liquid or gas.

[0055] More preferably, if Figure 5 As shown, a receiving groove for limiting and accommodating the sealing ring 4 is also provided at the upper end of the columnar member, so as to further improve the sealing performance and further avoid the phenomenon that the nut portion of the sealing bolt is too protruding.

[0056] The utility model also provides a battery, which includes the above-mentioned battery top cover. In the battery, by adding a sealing reinforcement 2 to the top cover body 1 of the battery top cover, and using the sealing connector 3 to seal the connecting hole 21 of the sealing reinforcement 2, the sealing strength can be guaranteed when the sealing connector 3 is fixedly connected to the sealing reinforcement 2 to prevent leakage of the electrolyte. When the sealing connector 3 is separated from the sealing reinforcement 2, the electrolyte can be injected through the connecting hole 21 and the injection hole 11 to complete the rehydration operation. After the rehydration operation is completed, the sealing connector 3 can be installed on the sealing reinforcement 2 again to achieve the re-sealing of the injection hole 11. Therefore, the battery top cover can realize repeated rehydration operations, and the operation is simple and quick, the overall structure is simple, and it has an economical rehydration cost and a high rehydration efficiency.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The battery cover can be used for repeated refilling, characterized in that: include: A top cover body (1), wherein the top cover body (1) is provided with a liquid injection hole (11), and a connecting portion (12) is provided on a side of the top cover body (1) away from the battery core; A sealing reinforcement member (2), the sealing reinforcement member (2) being fixedly connected to the connecting portion (12), and being sealed between the sealing reinforcement member (2) and the top cover body (1); the sealing reinforcement member (2) having a connecting hole (21) extending therethrough, and the connecting hole (21) being connected to the liquid injection hole (11); A sealing connector (3), wherein the sealing connector (3) is detachably connected to the sealing reinforcement member (2), and when connected, the sealing connector (3) is capable of sealing the communication hole (21).

2. The battery top cover according to claim 1, characterized in that: The connecting portion (12) is protrudingly arranged on the top cover body (1), and the connecting portion (12) is capable of limiting the position of the sealing reinforcement component (2).

3. The battery top cover according to claim 2, characterized in that: The connecting portion (12) is continuously arranged around the circumference of the sealing reinforcement member (2), and the connecting portion (12) is fixedly and sealingly connected to the side surface of the sealing reinforcement member (2).

4. The battery top cover according to claim 3, characterized in that: The connecting portion (12) is integrally stamped and formed on the top cover body (1).

5. The battery top cover according to claim 3, characterized in that: The thickness of the portion of the top cover body (1) located inside the connecting portion (12) is smaller than the thickness of the portion of the top cover body (1) located outside the connecting portion (12).

6. The battery top cover according to claim 3, characterized in that: The connecting portion (12) is connected to the side surface of the sealing reinforcement component (2) by welding.

7. The battery top cover according to claim 3, characterized in that: The sealing reinforcement member (2) is a columnar member, the outer peripheral surface of the columnar member is fixed and sealed to the annular connecting portion (12), the connecting hole (21) is arranged along the axial direction of the columnar member, the connecting hole (21) is configured as a threaded hole, and the sealing connecting member (3) is a sealing bolt, which is threadedly connected to the connecting hole (21).

8. The battery top cover according to claim 7, characterized in that: The battery top cover also includes a sealing ring (4), which is sleeved on the sealing bolt, and when the sealing bolt is connected to the columnar member, the sealing ring (4) seals and abuts between the nut portion of the sealing bolt and the end surface of the columnar member.

9. The battery top cover according to any one of claims 1 to 8, characterized in that: Along a direction perpendicular to the top cover body (1), the sealing connection length between the sealing reinforcement member (2) and the sealing connection member (3) is not less than 2 mm.

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

Images