A lead-acid battery that does not reverse polarity

Abstract

The present invention discloses a lead-acid battery that does not reverse polarity, comprising a battery body, a positive electrode, a negative electrode, and a battery cover. The battery body comprises a battery tank, a plate group fixedly connected in the battery tank, and a tab on the plate group. The positive electrode and the negative electrode are both fixedly connected to the tab. The positive electrode and the negative electrode are both truncated in a cone shape with a bottom diameter greater than a top diameter. The bottom diameter R1 of the positive electrode is greater than the bottom diameter R2 of the negative electrode. The positive electrode and the negative electrode are both provided with a limiting boss on the side periphery of the middle portion. The positive electrode and the negative electrode are both sleeved with a top block that cooperates with the limiting boss. The present invention, by redesigning the pole holes for the poles to pass through on the poles and the battery cover, can prevent artificial reverse polarity with a simple structure, cleverly improving the safety, service life, and discharge capacity of the battery. The redesign of the welding structure between the tab and the pole ensures smooth welding, and the structure is simpler, which can save manufacturing costs.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid battery shell structure design and assembly and capping process, in particular to a non-reversible lead-acid battery. Background Art

[0002] Lead-acid batteries are batteries whose electrodes are primarily made of lead and its oxides, and whose electrolyte is a sulfuric acid solution. In the discharged state, the positive electrode is primarily composed of lead dioxide, while the negative electrode is primarily composed of lead. They offer advantages such as stable voltage, low price, simple maintenance, consistent quality, and high reliability, making them one of the most widely used batteries on the market.

[0003] Currently, lead-acid battery manufacturers mostly design their battery casings to have equal-sized positive and negative terminals, sharing common components. This makes cap reverse polarity a common problem during the production process, leading to oxidation and corrosion of the positive terminal of the lead-acid battery, resulting in premature product failure. Currently, this problem is generally addressed by designing the terminal and battery cover structures. For example, utility model patent application number CN200220020024.6 (hereinafter referred to as prior art solution one) discloses a lead-acid battery output structure that employs a "large positive terminal and small negative terminal" design to prevent intentional polarity reverse and increase discharge energy. Separately, invention patent application number CN201410468994.X (hereinafter referred to as prior art solution two) discloses a battery that not only prevents reverse polarity when the battery cover is engaged, but also utilizes a comb-shaped connection device for welding to the terminal tab, improving product quality.

[0004] From the above-mentioned prior art, it can be seen that designing a battery that can prevent artificial polarity reversal is in line with the development prospects of batteries. Considering that the welding of the tabs and poles on the existing plate groups usually requires strict dimensional requirements, if the requirements are not met, the tabs must be corrected using dedicated tab shaping equipment (such as the battery tab automatic sorting device disclosed in the utility model patent application number CN201621053293.0). If the comb-shaped connection device in the second prior art solution is adopted, it is easy for some tabs to not pass smoothly through the comb teeth, resulting in increased costs. In addition, lead-acid batteries are dangerous goods. Therefore, this patent proposes a lead-acid battery with high safety and lower manufacturing costs. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a lead-acid battery with no polarity reversal. By redesigning the pole holes on the poles and the battery cover for the poles to pass through, the present invention can curb the artificial polarity reversal with a simple structure, cleverly improving the safety, service life and discharge capacity of the battery. In addition, by redesigning the welding structure between the pole ears and the poles, it is ensured that welding can be carried out smoothly, and the structure is simpler, which can save manufacturing costs.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A non-reversible lead-acid battery, the lead-acid battery comprising a battery body, a positive electrode column, a negative electrode column and a battery cover, the battery body comprising a battery slot, a plate group fixedly connected in the battery slot and a pole ear on the plate group; the positive electrode column and the negative electrode column are both fixedly connected to the pole ear, the positive electrode column and the negative electrode column are both in the shape of a truncated cone with a bottom diameter greater than a top diameter, the bottom diameter R1 of the positive electrode column is greater than the bottom diameter R2 of the negative electrode column, the middle side periphery of the positive electrode column and the negative electrode column are both provided with a limiting boss, and the positive electrode column and the negative electrode column are both sleeved with The top blocks that cooperate with the limiting boss have different specifications. The battery cover is used to cover the upper part of the battery body, and the battery cover is respectively provided with a positive electrode hole for the positive electrode column to pass through and a negative electrode hole for the negative electrode column to pass through. After the battery cover is closed, the positive electrode hole cooperates with the positive electrode column, and the negative electrode hole cooperates with the negative electrode column. The bottom inner diameter of the negative electrode hole is smaller than the top surface diameter of the positive electrode column. The side of the bottom end of the battery cover close to the positive electrode hole cooperates with the top block on the positive electrode column, and the side of the bottom end of the battery cover close to the negative electrode hole cooperates with the top block on the negative electrode column.

[0008] Preferably, an annular sealing sleeve is provided in each of the positive electrode hole and the negative electrode hole.

[0009] Preferably, a sealing gasket is fixedly connected to each of the top blocks.

[0010] Preferably, the upper end surface of the battery cover is provided with countersunk holes on one side close to the positive electrode hole and the negative electrode hole, and the annular sealing sleeve is in an I-shape to ensure that the bottom surface of the countersunk hole can be sealed.

[0011] Preferably, the bottom ends of the positive electrode column and the negative electrode column are fixedly connected with welding blocks for connecting the tabs.

[0012] Preferably, the top ends of the two tabs are chamfered, and the bottom end of the welding block is provided with a plurality of trapezoidal grooves, the bottom angles of the trapezoidal grooves being greater than the chamfer angles of the tabs, ensuring that there are sufficient weldable positions between the tabs and the trapezoidal grooves in the width direction.

[0013] Preferably, a keyway is provided on one side of the battery cover close to the countersunk hole.

[0014] Preferably, the angle between the busbar and the bottom surface of the positive electrode column and the negative electrode column does not exceed 10°.

[0015] Preferably, the length of the trapezoidal groove is 1.5-2.0 times the length of the top of the tab.

[0016] Preferably, the difference between the width of the bottom of the trapezoidal groove and the width of the top of the tab is 1.0 mm to 2.0 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects: through the technical solution of the positive and negative poles being in the shape of a truncated cone, and the size of the positive pole being larger than that of the negative pole, not only can the battery cover be prevented from being installed upside down and the discharge capacity of the battery be enhanced, but also after the battery cover is normally assembled, the annular sealing sleeve and the sealing gasket are squeezed, which has a better sealing effect than the straight column type electrode poles used in the prior art. This simple structure cleverly improves the safety, service life and discharge capacity of the battery; through the welding block with a trapezoidal groove at the bottom, sufficient position is reserved for the welding of the pole ear, so that even if the tolerance of the pole ear is large, welding can be carried out smoothly. Compared with the existing comb-shaped welding structure, the situation where the pole ear cannot pass through the comb teeth for welding due to large tolerance will not occur, and the structure is simpler, and the processing requirements for the pole ear are greatly reduced, which can save manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the structure of a lead-acid battery without polarity reversal proposed by the present invention;

[0019] Figure 2 This is a schematic structural diagram of a negative electrode column in a lead-acid battery without polarity reversal proposed by the present invention, mainly showing an annular sealing sleeve;

[0020] Figure 3 This is a schematic diagram of the assembly of a non-reversible lead-acid battery proposed by the present invention, mainly showing the keyway.

[0021] In the figure: 1. Battery body; 2. Positive pole; 3. Negative pole; 4. Battery cover; 5. Battery slot; 6. Tab; 7. Limiting boss; 8. Top block; 9. Positive pole hole; 10. Negative pole hole; 11. Annular sealing sleeve; 12. Sealing gasket; 13. Countersunk hole; 14. Welding block; 15. Trapezoidal groove; 16. Keyway. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0023] See also Figure 1-3 The present invention provides the following technical solution: a non-reversible lead-acid battery, comprising a battery body 1, a positive electrode column 2, a negative electrode column 3, and a battery cover 4. The battery body 1 includes a battery container 5, a plate group fixedly connected within the battery container 5, and a tab 6 on the plate group; the positive electrode column 2 and the negative electrode column 3 are both fixedly connected to the tab 6. The positive electrode column 2 and the negative electrode column 3 are both in the shape of a cone with a bottom diameter larger than the top diameter. The bottom diameter R1 of the positive electrode column 2 is larger than the bottom diameter R2 of the negative electrode column 3. Such positive electrode column 2 and negative electrode column 3 not only make it impossible to cover the battery cover 4 when it is reversed, so that it can only be covered with positive and negative covers facing each other, which will not cause the battery to be used in reverse, protecting the battery while protecting the equipment, and making the positive electrode terminal larger, which can increase the current carrying capacity and improve the battery's high current discharge capacity; effectively solve the problem of premature failure of the product caused by oxidation and corrosion of the positive electrode of the lead-acid battery, and increase the service life of the battery, but also can have an extrusion force between the annular sealing sleeve 11 and the sealing gasket 12 after assembly, so as to achieve a better sealing effect. The positive electrode column 2 and the negative electrode column 3 are both provided with a limiting boss 7 on the side periphery of the middle part. After the top block 8 is placed on the limiting boss 7, it can prevent the top block 8 from sinking, thereby over-tightening the assembly and poor sealing performance. The positive electrode column 2 and the negative electrode column 3 are both sleeved with a top block 8 that cooperates with the limiting boss 7. The specifications of the two top blocks 8 are different, ensuring that the electrode cannot pass through the electrode hole when the battery cover 4 is reversed; the battery cover 4 is used to cover the upper part of the battery body 1, and the battery cover 4 is respectively provided with a positive electrode hole 9 for the positive electrode column 2 to pass through and a negative electrode hole 10 for the negative electrode column 3 to pass through, and after the battery cover 4 is covered, the positive electrode hole 9 cooperates with the positive electrode column 2, and the negative electrode hole 10 cooperates with the negative electrode column 3; the bottom inner diameter of the negative electrode hole 10 is smaller than the top surface diameter of the positive electrode column 2, so that the top of the positive electrode column 2 cannot pass through the negative electrode hole 10 when the battery cover 4 is reversed. The side of the bottom end of the battery cover 4 close to the positive electrode hole 9 cooperates with the top block 8 on the positive electrode column 2, and the side of the bottom end of the battery cover 4 close to the negative electrode hole 10 cooperates with the top block 8 on the negative electrode column 3.

[0024] like Figure 1 and Figure 2As shown, an annular sealing sleeve 11 is sleeved within each of the positive electrode hole 9 and the negative electrode hole 10, and a sealing gasket 12 is fixedly connected to the top block 8. The annular sealing sleeve 11 and the sealing gasket 12 are both made of insulating rubber. After the positive electrode column 2 and the negative electrode column 3 are assembled, they form an interference fit with the annular sealing sleeve 11. At the same time, the sealing gasket 12 is squeezed by the top block 8, sealing the gap between the positive electrode hole 9 and the positive electrode column 2, and the gap between the negative electrode hole 10 and the negative electrode column 3, to prevent leakage and contamination.

[0025] like Figure 1 and Figure 2 As shown, the upper end surface of the battery cover 4 is provided with countersunk holes 13 near the positive electrode hole 9 and the negative electrode hole 10. The top ends of the positive electrode post 2 and the negative electrode post 3 are lower than the top openings of the countersunk holes 13, so that the positive electrode post 2 and the negative electrode post 3 are not exposed on the surface of the battery cover 4, thus preventing damage to the posts. The countersunk holes 13 also reserve wiring space for external wiring cards. The annular sealing sleeve 11 is in an I-shape and can cover the bottom surface of the countersunk holes 13, providing a better sealing effect.

[0026] like Figure 1 and Figure 2 As shown, the bottom ends of the positive electrode column 2 and the negative electrode column 3 are fixedly connected with welding blocks 14 for connecting to the electrode tabs 6, which are used for welding to the electrode tabs 6 to connect the electrode columns to the electrode group.

[0027] like Figure 1 and Figure 2 As shown, the top ends of the two tabs 6 are chamfered, and a plurality of trapezoidal grooves 15 are provided at the bottom end of the welding block 14. The bottom angles of the trapezoidal grooves 15 are all greater than the chamfer angles of the tabs 6. Compared with the existing comb-shaped structure for welding the tabs 6, the arrangement of the trapezoidal grooves 15 ensures that even if the tolerance is large, the top ends of the tabs 6 are still located in the trapezoidal grooves 15, ensuring that the tabs 6 and the welding block 14 can be welded. In addition, the structure is simpler, which can save manufacturing costs.

[0028] In this embodiment, the tab 6 can also be configured to be L-shaped, and the trapezoidal groove 15 is opened at the top of the welding block 14 , which makes it easier to weld the welding block 14 to the tab 6 from the outside of the battery body 1 .

[0029] like Figure 3 As shown, a keyway 16 is provided on one side of the battery cover 4 near the countersunk hole 13 so that the external wiring card can be smoothly placed in the countersunk hole 13 for wiring with the pole.

[0030] like Figure 1 and Figure 2 As shown, the angles between the busbars and the bottom surfaces of the positive electrode column 2 and the negative electrode column 3 do not exceed 10°, which can ensure that when the battery cover 4 is assembled with the electrode, there is an interference fit between the electrode and the annular sealing sleeve 11.

[0031] like Figure 1and Figure 2 As shown, the length of the trapezoidal groove 15 is 1.5-2.0 times the length of the top of the tab 6, ensuring that there is enough welding position between the tab 6 and the trapezoidal groove 15 in the length direction, so that welding can still be performed when the actual welding position changes due to a large tolerance after processing of the tab 6.

[0032] like Figure 1 and Figure 2 As shown, the difference between the bottom width of the trapezoidal groove 15 and the top width of the tab 6 is 1.0 mm to 2.0 mm, ensuring that there is enough welding space between the tab 6 and the trapezoidal groove 15 in the width direction.

[0033] The working principle and usage process of the present invention are as follows: when the top of the pole tab 6 is welded to the bottom of the trapezoidal groove 15, since the difference between the bottom width of the trapezoidal groove 15 and the top width of the pole tab 6 is 1.0mm-2.0mm, and the length of the trapezoidal groove 15 is 1.5-2.0 times the length of the top of the pole tab 6, the pole tab 6 has enough space to be welded to the welding block 14, and even if the tolerance of the pole tab 6 is large, it can be welded smoothly. Compared with the existing comb-shaped welding structure, the situation that the pole tab 6 cannot pass through the comb teeth for welding due to large tolerance will not occur, and the structure is simpler, the processing requirements for the pole tab 6 are greatly reduced, and the manufacturing cost can be saved. The battery cover 4 is placed on the battery body 1. Since the size of the positive electrode column 2 is larger than that of the negative electrode column 3, the battery cover 4 cannot be installed upside down, and the battery discharge capacity is stronger. Since the positive electrode column 2 and the negative electrode column 3 are both frustum-shaped, when the battery cover 4 is installed, the positive electrode column 2 and the negative electrode column 3 form an interference fit with the annular sealing sleeve 11, and the top block 8 squeezes the sealing gasket 12. Compared with the straight column type electrode column used in the prior art, it has a better sealing effect. Through this simple structure, the safety, service life and discharge capacity of the battery are cleverly improved.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lead-acid battery without reverse polarity, characterized in that: The lead-acid battery comprises: The battery body includes a battery container, a plate group fixedly connected in the battery container, and tabs on the plate group; The positive and negative electrode columns are both truncated cone-shaped with a larger bottom diameter than a top diameter. The bottom diameter R1 of the positive electrode column is larger than the bottom diameter R2 of the negative electrode column. Position-limiting bosses are provided on the central side of each of the positive and negative electrode columns. Top blocks that cooperate with the position-limiting bosses are sleeved on each of the positive and negative electrode columns. The two top blocks have different specifications. A battery cover, wherein the battery cover is respectively provided with a positive electrode hole for the positive electrode column to pass through and a negative electrode hole for the negative electrode column to pass through, and after the battery cover is closed, the positive electrode hole cooperates with the positive electrode column, and the negative electrode hole cooperates with the negative electrode column, the bottom inner diameter of the negative electrode hole is smaller than the top surface diameter of the positive electrode column, and the side of the bottom end of the battery cover close to the positive electrode hole cooperates with the top block on the positive electrode column, and the side of the bottom end of the battery cover close to the negative electrode hole cooperates with the top block on the negative electrode column.

2. A lead-acid battery without polarity reversal according to claim 1, characterized in that: An annular sealing sleeve is sleeved in each of the positive electrode hole and the negative electrode hole.

3. A lead-acid battery without polarity reversal according to claim 2, characterized in that: The top blocks are all fixedly connected with sealing pads.

4. A lead-acid battery without polarity reversal according to claim 2, characterized in that: The upper end surface of the battery cover is provided with countersunk holes on one side close to the positive electrode hole and the negative electrode hole, and the annular sealing sleeve is in an I-shape.

5. The non-reversible lead-acid battery according to claim 1, characterized in that: The bottom ends of the positive electrode column and the negative electrode column are both fixedly connected with welding blocks for connecting the tabs.

6. A lead-acid battery without polarity reversal according to claim 5, characterized in that: The top ends of the two tabs are chamfered, and the bottom end of the welding block is provided with a plurality of trapezoidal grooves, and the bottom angles of the trapezoidal grooves are all greater than the chamfer angles of the tabs.

7. The non-reversible lead-acid battery according to claim 4, characterized in that: A key groove is provided on one side of the battery cover close to the countersunk hole.

8. The non-reversible lead-acid battery according to claim 1, characterized in that: The angles between the busbars and the bottom surfaces of the positive and negative poles do not exceed 10°.

9. The non-reversible lead-acid battery according to claim 6, characterized in that: The length of the trapezoidal groove is 1.5-2.0 times the length of the top of the tab.

10. The non-reversible lead-acid battery according to claim 6, characterized in that: The difference between the width of the bottom of the trapezoidal groove and the width of the top of the tab is 1.0 mm to 2.0 mm.

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