Middle cover for lead-acid storage battery and battery thereof

Abstract

The utility model relates to the technical field of batteries, in particular to a middle cover for a lead-acid storage battery and a battery thereof, the middle cover comprises a cover body and two corresponding annular grooves arranged on the cover body, a connecting hole penetrating through the cover body is arranged in each annular groove, and an end cap is arranged above each connecting hole in a covering manner. The sealed end cap is arranged above the connecting hole of the middle cover, so that the connecting hole is in a closed state, when the cover is sealed, the connecting block can directly extend into the end cap and then is cured, and at the moment, the middle cover and the connecting block can be directly sealed only through one-time glue sealing, so that a sealing ring and primer can be omitted, and the cost is reduced. The production efficiency is improved, and the production cost is reduced. The utility model also discloses a battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a middle cover for a lead-acid battery and a battery thereof. Background Art

[0002] Lead-acid batteries are widely used in many fields due to their many advantages, including electric vehicles, UPS power supplies, solar energy storage systems and ship power systems. They can meet the requirements of these systems for large capacity, high energy density and long cycle life, and provide stable power support. In addition, lead-acid batteries also have the advantages of low price and simple maintenance.

[0003] The production process of lead-acid batteries involves the following steps: inserting the mold assembly into the battery shell after casting and welding, sealing the cover, curing, and finally adding an O-ring to the connecting block, welding the terminals, and pouring the bottom glue and color glue. Existing lead-acid batteries basically include a middle cover, a connecting block, a sealing ring, terminals, plates, and a battery box. The middle cover has a concave through-hole, and one end of the connecting block is connected to the tabs of the positive and negative plates, while the other end passes through the through-hole. At this time, the middle cover is placed on the battery box and sealed. The sealing ring is then tightened onto the connecting post. Finally, the protruding portion of the connecting post is fixedly connected to the terminal through welding. Then, the bottom glue and color glue are poured, and the connection block and the middle cover are sealed again. After the middle cover is sealed and connected to the battery box, the through-hole and the connecting block must be sealed with a sealing ring and bottom glue. This requires two separate sealing and curing operations, which is complicated and affects production efficiency. Utility Model Content

[0004] One of the purposes of the present utility model is to provide a middle cover for a lead-acid battery. In view of the shortcomings of the above-mentioned prior art, the utility model aims to solve the technical problem that after the middle cover of the lead-acid battery is sealed, a sealing ring and a bottom glue seal need to be installed, resulting in the need for two glue seal curing operations, which is complicated and affects production efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A middle cover for a lead-acid battery comprises a cover body and two annular grooves arranged corresponding to the cover body. A connecting hole penetrating the cover body is arranged in each annular groove, and an end cap is provided above the connecting hole.

[0007] Preferably, the end cap has a cavity, and the height of the end cap is smaller than the depth of the annular groove.

[0008] Preferably, two symmetrical limit blocks are provided in the annular groove, and each limit block is provided with a locking slot.

[0009] Preferably, the cover body and the end cap are an integrated structure, the end cap is extended upward along the connecting hole and the cavity is communicated with the connecting hole.

[0010] Preferably, the cover body and the end cap are of a split structure, and a hollow connecting column extends upward along the outer wall of the connecting hole.

[0011] Preferably, the outer wall of the connecting column and the inner wall of the cavity of the end cap are both provided with matching fixing structures.

[0012] Preferably, the card slot is connected to a terminal, and a card hole is provided at one end of the terminal, and the card hole corresponds to the connecting hole or the connecting column.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] The middle cover of the present invention includes a cover body and two annular grooves corresponding to the cover body. Each annular groove is provided with a connection hole that penetrates the cover body, and an end cap is provided above the connection hole. The present application provides a sealed end cap above the connection hole of the middle cover, so that the connection hole is in a closed state. When the cover is sealed, the connection block can be directly inserted into the end cap and then cured. In this case, only one glue seal is required to directly seal the middle cover and the connection block, thereby eliminating the need for sealing rings and primer, improving production efficiency and reducing production costs.

[0015] The second object of the present utility model is to provide a battery, comprising the above-mentioned middle cover, a plurality of connecting blocks connected to the middle cover, and electrode plates connected to the plurality of connecting blocks.

[0016] Preferably, a protrusion is provided at one end of the connecting block corresponding to the annular groove, the protrusion passes through the connecting hole and is connected to the end cap, and the protrusion is a conical structure.

[0017] Preferably, it further comprises a battery box provided with a plurality of cavities, the middle cover is arranged on the top of the battery box, and the electrode plates are accommodated in the cavities of the battery box.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The battery provided by the utility model has a simple structure and is easy to produce, and can quickly improve production efficiency, reduce waste of resources and avoid environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is one of the overall structural diagrams of the middle cover in the utility model;

[0022] Figure 2 This is the second overall structural diagram of the middle cover in the present utility model;

[0023] Figure 3 This is the third overall structural diagram of the middle cover in the present utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the terminal in the utility model;

[0025] Figure 5 It is a cross-sectional view of the middle cover and the connecting block in the utility model;

[0026] Figure 6 This is a schematic diagram of the overall structure of the battery in the present utility model;

[0027] Figure 7 This is a schematic diagram of the overall structure of the connecting block in the utility model;

[0028] Figure 8 It is a schematic diagram of the internal structure of the battery box in the utility model.

[0029] The reference numerals used in the above drawings are as follows:

[0030] 1-middle cover, 10-cover body, 11-annular groove, 12-connecting hole, 13-end cap, 14-cavity, 15-limiting block, 16-slot, 17-connecting column, 18-terminal, 19-hole, 2-connecting block, 21-protrusion, 3-plate, 4-battery box. DETAILED DESCRIPTION

[0031] In the description of the embodiments of the present application, the term "at least two" refers to more than two (including two), and similarly, "plurality" refers to more than two (including two). The orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying 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 limiting the embodiments of the present application.

[0032] In order to solve the problems raised in the above background technology, the inventors have designed a middle cover for a lead-acid battery and a battery thereof after in-depth research. The middle cover for a lead-acid battery and the battery provided by this application are explained in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] like Figures 1 to 5As shown, a middle cover for a lead-acid battery includes a cover body 10 and two annular grooves 11 disposed in correspondence with the cover body 10. Each annular groove 11 is provided with a connection hole 12 that penetrates the cover body 10, and an end cap 13 is provided above the connection hole 12. Specifically, including but not limited to, the annular groove 11 is provided on one side of the top of the cover body 10, and the two annular grooves 11 are symmetrical in vertical direction. The connection hole 12 is opened from the center of the annular groove 11 and penetrates the cover body 10. The end cap 13 is tightly connected to the connection hole 12 and is configured as a hexagonal nut structure.

[0035] Through the above scheme, the end cap 13 makes the connection hole 12 of the cover body 10 in a closed state. When sealing, the connecting block 2 can be directly extended into the end cap 13 and then cured. At this time, only one sealing with the sealing glue is required to directly seal the middle cover 1 and the connecting block 2, thereby omitting the sealing ring and the bottom glue, improving production efficiency, and reducing production costs.

[0036] As an improved embodiment, the end cap 13 has a cavity 14, and the height of the end cap 13 is less than the depth of the annular groove 11. Specifically, including but not limited to, the cavity 14 is a cylindrical structure so that the connecting column 17 can fully contact the end cap 13 to improve the sealing performance. At the same time, the height of the end cap 13 is less than the depth of the annular groove 11, so that the height of the end cap 13 is lower than the upper plane of the middle cover 1. Of course, the matching structure of the end cavity 14 and the connecting column 17 can be set according to actual needs.

[0037] Through the above solution, the cavity 14 is configured to accommodate the connecting column 17 to achieve connection with the terminal, while also ensuring the sealing of the middle cover 1, and the height of the end cap 13 is lower than the depth of the annular groove 11, which can prevent the connecting column 17 from being scratched.

[0038] As an improved embodiment, two symmetrical limit blocks 15 are further provided in the annular groove 11, and each limit block 15 is provided with a locking slot 16. Specifically, including but not limited to, the limit blocks 15 are provided to fit the groove arms of the annular groove 11, a gap is provided between the two limit blocks 15 and they are symmetrically distributed, the size of the gap is set corresponding to the width of the terminal 18, the limit blocks 15 are provided with a rectangular structure, and of course, the terminal 18 is also provided with a locking column that cooperates with the locking slot 16 to limit the position. The specific structure of the locking column can be set according to the shape of the locking slot 16.

[0039] Through the above solution, the arrangement of the clamping column and the clamping slot 16 enables the terminal 18 to be initially limited and fixed, which facilitates the fixation of the terminal 18.

[0040] As an improved specific embodiment, the cover body 10 and the end cap 13 are an integrated structure, the end cap 13 is extended upwardly along the connection hole 12, and the cavity 14 is connected to the connection hole 12. Specifically, including but not limited to, the cover body 10 and the end cap 13 are stamped into an integrated structure, the connection hole 12 and the cavity 14 of the end cap 13 have the same diameter, and the connection hole 12 and the cavity 14 are connected, and the end face is arranged above the connection hole 12. At this time, the sealing glue during sealing can be used for one-time sealing and then solidified. After the sealing is completed, it can be directly twisted off by the hexagonal gripper in the automatic equipment, and then recycled and reused to avoid waste of resources. After twisting off, the connecting column 17 leaks out, and at this time, the connecting block 2 and the terminal 18 can be welded and fixed.

[0041] Through the above solution, the end cap 13 and the middle cover 1 are configured as an integrated structure, so as to improve the production efficiency of the lead-acid battery.

[0042] As an improved specific embodiment, the slot 16 is connected to a terminal 18, and a latch hole 19 is provided at one end of the terminal 18, and the latch hole 19 corresponds to the connecting hole 12 or the connecting column 17. Specifically, including but not limited to, the terminal 18 can be set as a terminal, which can quickly store or release energy through the connection with the connecting column 17, and the connecting column 17 passes through the connecting hole 12 and the latch hole 19 from bottom to top. The terminal 18 can be further limited and fixed to facilitate the welding and fixation of the terminal 18 and the connecting column 17. The two sides of the terminal 18 are respectively provided with latches, which are directly inserted into the slot 16, and the bottom surface of the terminal 18 is in contact with the wall surface of the annular groove 11. Of course, the diameter of the latch hole 19 can be set to follow the connection column 17 to ensure that the terminal 18 can fit tightly with the connecting column 17, further improving the sealing performance.

[0043] Example 2

[0044] The difference from Example 1 is that: Figure 3 As shown, in this embodiment, the cover body 10 and the end cap 13 are of a split structure, and the connecting hole 12 has a hollow connecting column 17 extending upward along the outer wall. The outer wall of the connecting column 17 and the inner wall of the cavity 14 of the end cap 13 are both provided with matching fixing structures. Specifically, including but not limited to, the fixing structure can be set as a matching structure with an external thread on the outer wall of the connecting column 17 and an internal thread on the inner wall of the cavity 14, so as to achieve the sealing of the end cap 13 and the middle cover 1, and the connecting column 17 and the middle cover 1 are integrally processed and formed, and the connecting hole 12, the connecting column 17 and the cavity 14 are connected in sequence. When the capping is completed, the card hole 19 of the terminal 18 passes through the connecting block 2 and fits with the connecting column 17, as shown Figure 1As shown, in this embodiment, the limit block 15 is set as a higher rectangular block, and the setting of the card slot 16 is omitted, which is more convenient for the processing of the middle cover 1; the cover body 10 and the end cap 13 are set as a split structure, so that the end cap 13 can be detached and recycled, reducing resource loss and ensuring the sealing between the middle cover 1 and the end cap 13.

[0045] The other structures are the same as those in Example 1 and will not be described in detail here.

[0046] Example 3

[0047] like Figures 6 to 8 As shown, a battery includes the aforementioned middle cover 1, multiple connecting blocks 2 connected to the middle cover 1, and electrode plates 3 connected to the multiple connecting blocks 2. Specifically, the connecting blocks 2 are connected to the tabs of the electrode plates 3, so that the electrode plates 3 in multiple independent cavities 14 in the battery box 4 are connected in series, also have a conductive function, and are tightly fitted with the middle cover 1.

[0048] Furthermore, a protrusion 21 is provided on the end of the connecting block 2 corresponding to the annular groove 11. The protrusion 21 passes through the connecting hole 12 and connects to the end cap 13. The protrusion 21 has a conical structure. Specifically, the upper and lower blocks on the right end of the connecting block 2 are each provided with a protrusion 21, and the two protrusions 21 correspond to the two connecting holes 12. The diameter of the protrusion 21 decreases from bottom to top and fits tightly with the connecting holes 12. At the same time, the top of the protrusion 21 is configured as a cone so that it cannot completely fill the cavity 14 of the end cap 13, making it easier to twist off or remove the end cap 13.

[0049] Furthermore, the battery further includes a battery box 4 having multiple cavities, a middle cover 1 being disposed above the battery box 4, and the electrode plates 3 being accommodated in the cavities of the battery box 4. Specifically, the battery box 4 is provided with multiple independent cavities, which can separate the battery module composed of multiple electrode plates 3 and can also be interconnected via the connecting block 2. It should be noted that the electrode plates 3 include positive and negative plates, which have been described in the prior art and will not be repeated in detail here.

[0050] 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, and they should all be included in the scope of the claims and description of the present application.

Claims

1. A middle cover for a lead-acid battery, characterized in that: It comprises a cover body and two annular grooves arranged corresponding to the cover body. A connecting hole penetrating the cover body is arranged in each annular groove, and a sealing end cap is provided above the connecting hole.

2. The middle cover for a lead-acid battery according to claim 1, wherein: The end cap has a cavity, and a height of the end cap is smaller than a depth of the annular groove.

3. The middle cover for a lead-acid battery according to claim 2, characterized in that: Two symmetrical limiting blocks are further provided in the annular groove, and each limiting block is provided with a clamping slot.

4. The middle cover for a lead-acid battery according to claim 3, characterized in that: The cover body and the end cap are an integrated structure. The end cap is extended upward along the connecting hole, and the cavity is communicated with the connecting hole.

5. The middle cover for a lead-acid battery according to claim 3, characterized in that: The cover body and the end cap are of a split structure, and a hollow connecting column is extended upward along the outer wall of the connecting hole.

6. The middle cover for a lead-acid battery according to claim 5, characterized in that: The outer wall of the connecting column and the inner wall of the cavity of the end cap are both provided with matching fixing structures.

7. The middle cover for a lead-acid battery according to claim 5 or 6, characterized in that: The clamping slot is connected to a terminal, one end of the terminal is provided with a clamping hole, and the clamping hole corresponds to the connecting hole or the connecting column.

8. A battery, characterized in that: The invention comprises the middle cover according to any one of claims 1 to 7, a plurality of connection blocks connected to the middle cover, and electrode plates connected to the plurality of connection blocks.

9. The battery according to claim 8, characterized in that The middle cover includes a cover body and two annular grooves corresponding to the cover body. A connecting hole passing through the cover body is provided in each annular groove. A sealed end cap is provided above the connecting hole. A protrusion is provided at one end of the connecting block corresponding to the annular groove. The protrusion passes through the connecting hole and is connected to the end cap. The protrusion is a conical structure.

10. The battery according to claim 8, characterized in that It also includes a battery box with multiple cavities, the middle cover is arranged on the top of the battery box, and the electrode plates are accommodated in the cavities of the battery box.

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