Lead storage battery with butt welding lead parts

Abstract

The utility model discloses a lead storage battery with butt welding lead parts, which comprises a battery jar, a plurality of partition plates and a plurality of groups of butt welding lead parts, the battery jar is divided into a plurality of battery grids by the partition plates, and each group of butt welding lead parts comprises a right partial lead part and a left partial lead part which are oppositely arranged. The right partial lead part and the left partial lead part are respectively positioned at the tops of the positive electrode group and the negative electrode group and are welded with the positive electrode group and the negative electrode group, the right partial lead part comprises a first butt welding piece and a first base, the first base and the first butt welding piece are fixed into an integral structure, the left partial lead part comprises a second butt welding piece and a second base, and the second base and the bottom of the second butt welding piece are fixed into an integral structure. A first bevel opening is formed in the upper end of the first butt welding piece, and a second bevel opening is formed in the upper end of the second butt welding piece. The first inclined opening and the second inclined opening are formed in the butt welding parts of the left lead part and the right lead part, so that the welding contact surface between the left lead part and the right lead part is increased, and the connection melting area and the thickness of the left lead part and the right lead part are increased.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a lead-acid battery with butt-welded lead parts. Background Technology

[0002] In the production process of existing lead-acid batteries, casting welding technology is typically used to weld battery terminals, lead parts, and other components. Existing lead-acid batteries mainly consist of a battery casing, battery cover, multiple electrode groups, and butt-welded lead parts. Multiple electrode groups are located inside the battery casing and include multiple positive and negative plates, and separators, which are stacked in an alternating manner. Separators separate the positive and negative plates. The tops of the positive and negative plates have tabs. Busbars connect to the tabs of the positive and negative plates in the multiple electrode groups. The butt-welded lead parts are welded to one side of the tabs of the positive and negative plates via the busbars. To facilitate demolding, the butt-welded lead parts of traditional electrode groups are usually designed in cylindrical or semi-circular shapes. However, the existing design of butt-welded lead parts has the following shortcomings:

[0003] 1) The pole groups are connected by welding lead parts. The material of the welding lead parts is pure lead. When connecting, the two welding lead parts are melted and then cooled and solidified into a whole. The two welding lead parts are cylindrical and semi-circular in shape. When welding, the contact surface between the two welding lead parts is relatively small, and the welding operation is not very convenient.

[0004] 2) During high-current discharge, the contact area between the two soldered lead parts is relatively small, which easily leads to heat generation and temperature rise, reducing the utilization rate of the battery. This structure will result in a small cross-sectional area when the electrode groups are connected by a bridge, which cannot carry a large current discharge. Utility Model Content

[0005] This utility model addresses the technical problems existing in the prior art by providing a lead-acid battery that increases the contact surface between the left and right lead parts by setting a first bevel and a second bevel on the weld joints of the left and right lead parts, thereby increasing the connection melting area and thickness of the left and right lead parts, improving conductivity, reducing the heat generation at the connection of the two weld joints during high-current discharge of the battery, and improving the high-current discharge capacity of the lead-acid battery.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A lead-acid battery with butt-welded lead components includes a battery case, several partition plates, and several sets of butt-welded lead components. The partition plates are fixed at intervals inside the battery case to divide the battery case into several battery cells. A positive electrode group and a negative electrode group are fixed in two adjacent battery cells respectively. Each set of butt-welded lead components is located at the top of two adjacent battery cells. Each set of butt-welded lead components includes a right-biased lead component and a left-biased lead component arranged opposite each other. The right-biased lead component and the left-biased lead component are located at the top of the positive electrode group and the negative electrode group respectively and are welded to them. The right-biased lead component includes a first butt-welded part and a first base. The first base is located at the bottom of the first butt-welded part and is fixed to it as an integral structure. The left-biased lead component includes a second butt-welded part and a second base. The second base is located at the bottom of the second butt-welded part and is fixed to it as an integral structure. The upper end of the first butt-welded part is provided with a first bevel, and the upper end of the second butt-welded part is provided with a second bevel.

[0008] Furthermore, a V-shaped cavity is formed between the first bevel of the first pair of weldments and the second bevel of the second pair of weldments.

[0009] Furthermore, the first pair of welded parts extends horizontally outward from the bottom edge of the first bevel to form a first protrusion, and a first groove is formed on one side of the first pair of welded parts, the first groove being located below the first protrusion. The second pair of welded parts extends horizontally outward from the bottom edge of the first bevel to form a second protrusion, and a second groove is formed on one side of the second pair of welded parts, the second groove being located below the second protrusion.

[0010] Furthermore, a retaining groove is formed between the first empty slot of the first pair of welded parts and the second empty slot of the second pair of welded parts.

[0011] Furthermore, the top of the first weld joint extends horizontally to form a first plane, which is located at the upper end of the first bevel.

[0012] Furthermore, the top of the second weldment extends horizontally to form a second plane, which is located at the upper end of the second bevel.

[0013] Furthermore, the first weld joint includes a first arcuate surface and a first rectangular plane, the first rectangular plane being located below the first protrusion, the first slot being formed by connecting the first rectangular plane to the bottom of the first protrusion, and the first arcuate surface surrounding the outside of the first rectangular plane.

[0014] Furthermore, the second weld joint includes a second arcuate surface and a second rectangular plane, the second rectangular plane being located below the second protrusion, the second slot being formed by connecting the second rectangular plane with the bottom of the second protrusion, and the second arcuate surface surrounding the outside of the second rectangular plane.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The lead-acid battery of this utility model includes a battery case, several partition plates, and several sets of welded lead parts. The partition plates divide the battery case into several battery cells. Positive and negative electrode groups are fixed in adjacent battery cells respectively. Each set of welded lead parts includes a right-biased lead part and a left-biased lead part arranged opposite each other. The right-biased lead part and the left-biased lead part are located on top of the positive and negative electrode groups and welded to them. The right-biased lead part includes a first welded component and a first base. The first base is located at the bottom of the first welded component and is fixed to it as an integral structure. The left-biased lead part includes a second welded component and a second base. The second base is located at the bottom of the second welded component and is fixed to it as an integral structure. The upper end of the first welded component has a first bevel, and the upper end of the second welded component has a second bevel. This utility model increases the contact surface between the welded components of the left and right lead parts by providing the first and second bevels on the welded components, increasing the connection melting area and thickness of the left and right lead parts, improving conductivity, and reducing heat generation at the connection of the two welded components during high-current discharge of the battery.

[0017] 2) The first pair of welded parts of this utility model extends horizontally outward from the bottom edge of the first bevel to form a first protrusion, and the second pair of welded parts extends horizontally outward from the bottom edge of the first bevel to form a second protrusion. By setting the first protrusion and the second protrusion, the right-biased lead parts and the left-biased lead parts can be conveniently welded, and can block the downward transfer of heat and lead liquid during welding, so as to avoid damage to the partition plate of the battery compartment during welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the welded lead parts in the lead-acid battery according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of another angle after welding the lead-acid parts in the lead-acid battery according to Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a pair of lead soldering parts according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the right-biased lead part according to Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the left-biased lead part in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the lead soldering parts according to Embodiment 2 of this utility model.

[0024] In the diagram: Battery slot 1, separator plate 2, butt welded lead part 3, right-biased lead part 31, first butt welded part 311, first bevel 3111, first protrusion 3112, first empty slot 3113, first plane 3114, first base 312, left-biased lead part 32, second butt welded part 321, second bevel 3211, second protrusion 3212, second empty slot 3213, second plane 3214, second base 322, V-shaped cavity 33, card slot 34. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings, which form part of this specification. The principles of the present invention will be illustrated through embodiments, and other aspects, features, and advantages of the present invention will become apparent from this detailed description. In the accompanying drawings, the same or similar parts in different figures are indicated by the same reference numerals. Example

[0026] like Figures 1-3As shown, this utility model provides a lead-acid battery with butt-welded lead parts 3. The lead-acid battery includes a battery case 1, several partition plates 2, and several sets of butt-welded lead parts 3. The partition plates 2 are fixedly spaced apart inside the battery case 1 to divide the battery case 1 into several battery cells. A positive electrode group and a negative electrode group are fixed in adjacent battery cells respectively. Specifically, the positive electrode group consists of several positive electrode plates and a first separator, with the first separator located between two adjacent positive electrode plates so that the positive electrode plates can be stacked on top of each other. The negative electrode group consists of several negative electrode plates and a second separator, with the second separator located between two adjacent negative electrode plates so that the negative electrode plates can be stacked on top of each other. Each set of butt-welded lead parts 3 is located at the top of two adjacent battery cells. Each set of lead-bonded components 3 includes a right-biased lead component 31 and a left-biased lead component 32 arranged opposite to each other. The right-biased lead component 31 and the left-biased lead component 32 are located on top of the positive electrode group and the negative electrode group respectively and are welded to them. The right-biased lead component 31 includes a first welding element 311 and a first base 312. The first base 312 is located at the bottom of the first welding element 311 and is fixed to it as an integral structure. The left-biased lead component 32 includes a second welding element 321 and a second base 322. The second base 322 is located at the bottom of the second welding element 321 and is fixed to it as an integral structure. The upper end of the first welding element 311 is provided with a first bevel 3111, and the upper end of the second welding element 321 is provided with a second bevel 3211. This invention utilizes the welding lead component 3, which is placed on top of the positive and negative electrode groups and welded to them. The welding lead component 3 is used for welding between the positive and negative electrode groups. A first bevel 3111 is provided at the upper end of the first welding component 311, and a second bevel 3211 is provided at the upper end of the second welding component 321. This facilitates welding and melting when the right-biased lead component 31 and the left-biased lead component 32 are placed on top of the positive and negative electrode groups. Compared to traditional cylindrical or semi-circular lead components, the welding lead component 3 designed in this invention, with its first bevel 3111 and second bevel 3211, increases the contact area between the welding components of the left and right lead components, increasing the connection melting area and thickness of the left and right lead components, improving conductivity, reducing heat generation at the connection point during high-current discharge of the battery, avoiding temperature rise at the connection point, improving battery safety, and making it more suitable for high-current discharge conditions.

[0027] In the first embodiment of this utility model, a V-shaped cavity 33 is formed between the first bevel 3111 of the first welding component 311 and the second bevel 3211 of the second welding component 321. During welding, the right-biased lead component 31 and the left-biased lead component 32 are arranged opposite to each other. The V-shaped cavity 33 formed by the first bevel 3111 of the first welding component 311 and the second bevel 3211 of the second welding component 321 is the welding area, which can increase the contact surface for welding the lead components and make the welding operation more convenient.

[0028] like Figures 4-5As shown, in a specific implementation of this utility model, the first pair of welded parts 311 extends horizontally outward from the bottom edge of the first bevel 3111 to form a first protrusion 3112, and a first slot 3113 is formed on one side of the first pair of welded parts 3111. The first slot 3113 is located below the first protrusion 3112. The second pair of welded parts 321 extends horizontally outward from the bottom edge of the first bevel 3111 to form a second protrusion 3212, and a second slot 3213 is formed on one side of the second pair of welded parts 3211. The second slot 3213 is located below the second protrusion 3212. A retaining groove 34 is formed between the first slot 3113 of the first pair of welded parts 3111 and the second slot 3213 of the second pair of welded parts 321. The clamping groove 34 formed by the first empty groove 3113 of the first weldment 311 and the second empty groove 3213 of the second weldment 321 conveniently clamps the partition plate 2 of the battery compartment 1. By setting the first protrusion 3112 and the second protrusion 3212, the right-biased lead part 31 and the left-biased lead part 32 can block the downward transfer of heat and lead liquid during welding, and avoid damage to the partition plate 2 of the battery compartment 1 during welding.

[0029] In Embodiment 1 of this utility model, the top of the first weldment 311 extends horizontally to form a first plane 3114, which is located at the upper end of the first bevel 3111. The top of the second weldment 321 extends horizontally to form a second plane 3214, which is located at the upper end of the second bevel 3211. The first weldment 311 includes a first arcuate surface and a first rectangular plane. The first rectangular plane is located below the first protrusion 3112. The first slot 3113 is formed by connecting the first rectangular plane with the bottom of the first protrusion 3112. The first arcuate surface surrounds the outside of the first rectangular plane. The second weldment 321 includes a second arcuate surface and a second rectangular plane. The second rectangular plane is located below the second protrusion 3212. The second slot 3213 is formed by connecting the second rectangular plane with the bottom of the second protrusion 3212. The second arcuate surface surrounds the outside of the second rectangular plane. The first arc-shaped surface of the first pair of weldments 311 and the second arc-shaped surface of the second pair of weldments 321 are distributed opposite to each other, and the first rectangular plane of the first pair of weldments 311 and the second rectangular plane of the second pair of weldments 321 are distributed opposite to each other.

[0030] Example 2: This utility model provides a lead-acid battery with a butt-welded lead component 3. The structure of the lead-acid battery is basically the same as that of Example 1. For ease of description and to save space, only the differences from Example 1 will be described below.

[0031] Each set of soldered lead parts 3 includes a right-biased lead part 31 and a left-biased lead part 32 arranged opposite to each other. The right-biased lead part 31 and the left-biased lead part 32 are located on top of the positive electrode group and the negative electrode group respectively and are soldered to them. The right-biased lead part 31 is the positive electrode lead part, and the left-biased lead part 32 is the negative electrode lead part. The top of the first solder joint 311 of the right-biased lead part 31 has a first horizontal plane 3114 and a first inclined surface extending downward from the bottom line of the first plane 3114. The top of the second solder joint 321 of the left-biased lead part 32 has a second horizontal plane 3214 and a second inclined surface extending downward from the bottom line of the second plane 3214. The main difference between this embodiment 2 and embodiment 1 is that the structural design of the right-biased lead part 31 and the left-biased lead part 32 is different. In this embodiment 2, the first solder joint 311 of the right-biased lead part 31 does not have a first protrusion 3112, and the second solder joint 321 of the left-biased lead part 32 does not have a second protrusion 3212.

[0032] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of this application. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A lead storage battery having a butt welded lead component, characterized by: The lead storage battery comprises a battery tank, a plurality of partition plates, a plurality of groups of butt-welded lead parts, the plurality of partition plates are fixed at intervals in the battery tank to divide the battery tank into a plurality of battery cells, a positive electrode group and a negative electrode group are respectively fixed in adjacent two battery cells, each group of butt-welded lead parts is located at the top of the adjacent two battery cells, each group of butt-welded lead parts comprises oppositely arranged right and left offset lead parts, the right and left offset lead parts are respectively located at the top of the positive electrode group and the negative electrode group and are welded thereto, the right offset lead part comprises a first butt-welding part and a first base, the first base is located at the bottom of the first butt-welding part and is fixed in an integral structure, the left offset lead part comprises a second butt-welding part and a second base, the second base is located at the bottom of the second butt-welding part and is fixed in an integral structure, the upper end of the first butt-welding part is provided with a first bevel, and the upper end of the second butt-welding part is provided with a second bevel.

2. A lead storage battery having butt welded lead parts as defined in claim 1 wherein: A V-shaped cavity is formed between the first bevel of the first butt-welding part and the second bevel of the second butt-welding part.

3. A lead storage battery having butt welded lead parts as defined in claim 2 wherein: The first butt-welding part extends horizontally outward from the bottom edge of the first bevel to form a first protrusion, one side of the first butt-welding part is formed with a first hollow groove, the first hollow groove is located below the first protrusion, the second butt-welding part extends horizontally outward from the bottom edge of the first bevel to form a second protrusion, one side of the second butt-welding part is formed with a second hollow groove, and the second hollow groove is located below the second protrusion.

4. A lead storage battery having butt welded lead parts as defined in claim 3 wherein: A clamping plate groove is formed between the first hollow groove of the first butt-welding part and the second hollow groove of the second butt-welding part.

5. The lead storage battery having butt welded lead parts of claim 1 wherein: A first flat surface is formed on the top of the first butt-welding part in a horizontal direction, and the first flat surface is located at the upper end of the first bevel.

6. The lead storage battery having butt welded lead parts of claim 1 wherein: A second flat surface is formed on the top of the second butt-welding part in a horizontal direction, and the second flat surface is located at the upper end of the second bevel.

7. The lead storage battery having butt welded lead parts as defined in claim 3 wherein: The first butt-welding part comprises a first arc-shaped curved surface and a first rectangular flat surface, the first rectangular flat surface is located below the first protrusion, the first hollow groove is formed by connecting the first rectangular flat surface and the bottom of the first protrusion, and the first arc-shaped curved surface surrounds the outside of the first rectangular flat surface.

8. The lead storage battery having butt welded lead parts of claim 3 wherein: The second butt-welding part comprises a second arc-shaped curved surface and a second rectangular flat surface, the second rectangular flat surface is located below the second protrusion, the second hollow groove is formed by connecting the second rectangular flat surface and the bottom of the second protrusion, and the second arc-shaped curved surface surrounds the outside of the second rectangular flat surface.

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