Terminal structure of lead-acid storage battery

Abstract

The utility model belongs to the technical field of storage batteries, and discloses a lead-acid storage battery terminal structure which comprises a terminal head, one end of the terminal head is provided with an insertion hole in insertion connection with an external conductor, the other end of the terminal head is integrally provided with a connecting piece, and the position, close to the connecting piece, of the outer wall of the terminal head is provided with an annular notch. And busbars wrapping the connecting pieces are cast-welded on the outer sides of the annular notches. According to the lead-acid storage battery, the terminal head and the busbar are cast-welded into a whole, so that the stability and the structural strength of the terminal head in the subsequent use process are improved, the situation that the terminal head is loosened in the later period due to the fact that a welding point between the terminal head and the busbar is too small is avoided, and normal use of the lead-acid storage battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of storage batteries, in particular to a lead-acid battery terminal structure. Background Art

[0002] A lead-acid battery generally refers to an acidic storage battery. The main advantages of an acidic storage battery are a relatively high working voltage, a wide operating temperature range, good high and low rate discharge performance, rich raw material sources, and low prices. For a lead-acid battery, its positive electrode is lead dioxide, its negative electrode is spongy lead, its electrolyte is an aqueous sulfuric acid solution, the separator (diaphragm) uses a microporous rubber separator, a microporous plastic separator or other materials according to different types of lead-acid batteries, and the battery case is made of materials such as hard rubber, engineering plastics, and fiberglass.

[0003] As Figure 1 shown, a lead-acid battery in the prior art generally includes a battery case 7, positive and negative plates 71 arranged in the battery case 7, separator paper 72 arranged between adjacent plates 71, an end cap (not shown in the figure) arranged at one end of the battery case 7, and a terminal head 1 (or called a pole post) arranged on the end cap. A bus bar 3 is commonly welded on the positive and negative plates 71, and one side of the bus bar 3 away from the positive and negative plates 71 is welded to one end of the terminal head 1 close to the inside of the battery case 7.

[0004] Regarding the above related technology, the inventor believes that there are the following defects: One end of the terminal head is welded to the bus bar, and one end of the terminal head is connected to an external conductor. Since the terminal head is relatively small in volume, when welded to the bus bar, the size of the welding point is small and the connection is not firm enough. When the part of the terminal head outside the end cap is subjected to an external force, it is easy to cause the welding point between the terminal head and the bus bar to become loose, affecting the normal use of the lead-acid battery. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a lead-acid battery terminal structure.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A lead-acid battery terminal structure includes a terminal head. One end of the terminal head is provided with a jack for plugging in an external conductor. The other end of the terminal head is integrally formed with a connecting piece. A circular groove is arranged on the outer wall of the terminal head near the connecting piece, and a bus bar wrapping the connecting piece is cast-welded outside the circular groove.

[0007] By adopting the above technical solution, an annular notch and a connecting piece are provided on the terminal head. After the terminal head is placed in the shaped groove of the mold, a bus bar that wraps the connecting piece is formed in the annular notch through cast welding, which changes the operation in the traditional technology where the bus bar needs to be first welded to the battery plate and then the terminal head is welded to the bus bar. The terminal head and the bus bar are cast welded into one body, increasing the stability and structural strength of the terminal head during subsequent use, and avoiding the situation that the terminal head loosens later due to the too small welding point between the terminal head and the bus bar, which is beneficial to ensuring the normal use of the lead-acid battery.

[0008] Further, the cross-section of the bus bar near the terminal head is circular, and the diameter of the circle is equal to the outer diameter of the terminal head.

[0009] By adopting the above technical solution, the aesthetics of casting and welding the bus bar on the terminal head is ensured.

[0010] Further, a notch is provided on the side wall of the connecting piece away from the axis of the terminal head.

[0011] Further, a through hole is provided through the connecting piece.

[0012] Further, the shape of the through hole is rectangular or circular.

[0013] In summary, the present utility model has the following beneficial effects:

[0014] 1. In the present application, an annular notch and a connecting piece are provided on the terminal head. After the terminal head is placed in the shaped groove of the mold, a bus bar that wraps the connecting piece is formed in the annular notch through cast welding, which changes the operation in the traditional technology where the bus bar needs to be first welded to the battery plate and then the terminal head is welded to the bus bar. The terminal head and the bus bar are cast welded into one body, increasing the stability and structural strength of the terminal head during subsequent use, and avoiding the situation that the terminal head loosens later due to the too small welding point between the terminal head and the bus bar, which is beneficial to ensuring the normal use of the lead-acid battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an existing lead-acid battery;

[0016] Figure 2 is a schematic structural diagram of the terminal head in Embodiment 1 of the present utility model;

[0017] Figure 3 is Figure 2 a schematic structural diagram of another perspective in

[0018] Figure 4 is a schematic structural diagram of the present utility model in Embodiment 1 for highlighting the casting and welding of the bus bar on the terminal head by a special mold;

[0019] Figure 5 FIG. 0 is a schematic structural diagram of the middle busbar and the terminal head after casting and welding in Embodiment 1 of the present utility model;

[0020] Figure 6 is Figure 5 a schematic structural diagram of another perspective;

[0021] Figure 7 FIG. 1 is a schematic structural diagram of the terminal head in Embodiment 2 of the present utility model;

[0022] Figure 8 FIG. 2 is a schematic diagram of the state before the external conductor is installed on the terminal head in Embodiment 2 of the present utility model;

[0023] Figure 9 FIG. 3 is a schematic diagram of the state after the external conductor is installed on the terminal head in Embodiment 2 of the present utility model.

[0024] In the figure: 1. Terminal head; 11. Jack; 12. Annular notch; 13. External thread; 2. Connecting piece; 3. Busbar; 4. Threaded sleeve; 41. Anti-slip groove; 5. External conductor; 6. Reinforcement component; 61. Rotating shaft; 62. Reinforcement plate; 621. Arc-shaped through hole; 622. Abutting portion; 6221. Rubber sheet; 63. Push rod; 7. Shell; 71. Plate; 72. Partition paper. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] Embodiment 1

[0027] Such as Figure 2-6As shown in the figure, an embodiment of the present application discloses a lead-acid battery terminal structure, including a terminal head 1. One end of the terminal head 1 is provided with a jack 11 for inserting an external conductor 5. The other end of the terminal head 1 is integrally formed with a connecting piece 2. An annular notch 12 is provided on the outer wall of the terminal head 1 near the connecting piece 2. A bus bar 3 wrapping the connecting piece 2 is cast-welded outside the annular notch 12. The terminal head 1 is provided with an annular notch 12 and a connecting piece 2. After the terminal head 1 is placed in the shaped groove of the mold, a bus bar 3 wrapping the connecting piece 2 is formed in the annular notch 12 through cast-welding, which changes the operation in the traditional technology of first welding the bus bar 3 to the battery plate 71 and then welding the terminal head 1 to the bus bar 3. The terminal head 1 and the bus bar 3 are cast-welded into one body, increasing the stability and structural strength of the terminal head 1 during subsequent use, avoiding the situation that the terminal head 1 loosens later due to the too small welding point between the terminal head 1 and the bus bar 3, and being beneficial to ensuring the normal use of the lead-acid battery.

[0028] To ensure the aesthetics of the cast-welding of the bus bar 3 on the terminal head 1, the cross-section of the bus bar 3 on the side close to the terminal head 1 is circular, and the diameter of the circle is equal to the outer diameter of the terminal head 1.

[0029] The working principle of a lead-acid battery terminal structure in this embodiment is as follows: The terminal head 1 is provided with an annular notch 12 and a connecting piece 2. After the terminal head 1 is placed in the shaped groove of the mold, a bus bar 3 wrapping the connecting piece 2 is formed in the annular notch 12 through cast-welding, which changes the operation in the traditional technology of first welding the bus bar 3 to the battery plate 71 and then welding the terminal head 1 to the bus bar 3. The terminal head 1 and the bus bar 3 are cast-welded into one body, increasing the stability and structural strength of the terminal head 1 during subsequent use, avoiding the situation that the terminal head 1 loosens later due to the too small welding point between the terminal head 1 and the bus bar 3, and being beneficial to ensuring the normal use of the lead-acid battery.

[0030] Embodiment 2

[0031] As Figure 2 and Figure 3 shown, the difference between this embodiment and Embodiment 1 is that: a notch 21 is provided on the side wall of the connecting piece 2 away from the axis of the terminal head 1.

[0032] Embodiment 3

[0033] As Figure 7 shown, the difference between this embodiment and Embodiment 2 is that: a through hole 22 is provided through the connecting piece 2, and the shape of the through hole 22 is rectangular.

[0034] Embodiment 4

[0035] As Figure 8As shown in the figure, the difference between this embodiment and Embodiment 2 is that: a through hole 22 is provided through the connecting piece 2, and the shape of the through hole 22 is circular.

[0036] Embodiment 5

[0037] As Figure 9 shown in the figure, the difference between this embodiment and Embodiment 2 is that: the number of through holes 22 on the connecting piece 2 is two.

[0038] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A lead-acid battery terminal structure, characterized in that: The invention comprises a terminal head (1), one end of which is provided with a socket (11) for plugging into an external conductor (5), the other end of which is integrally formed with a connecting piece (2), an annular notch (12) being provided on the outer wall of the terminal head (1) near the connecting piece (2), and a busbar (3) wrapping around the connecting piece (2) being cast-welded on the outer side of the annular notch (12).

2. A lead-acid battery terminal structure according to claim 1, characterized in that: The cross section of the busbar (3) on the side close to the terminal head (1) is circular, and the diameter of the circle is equal to the outer diameter of the terminal head (1).

3. A lead-acid battery terminal structure according to claim 2, characterized in that: A notch (21) is provided on the side wall of the connecting piece (2) away from the axis of the terminal head (1).

4. A lead-acid battery terminal structure according to claim 2, characterized in that: The connecting piece (2) is provided with a through hole (22).

5. A lead-acid battery terminal structure according to claim 4, characterized in that: The through hole (22) is in a rectangular or circular shape.

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