Lead storage battery structure capable of preventing cast-weld overmelting of tabs

Abstract

The utility model discloses a lead storage battery structure capable of preventing cast-weld overmelting of tabs, which comprises a plate group, the plate group comprises a plurality of positive plates and negative plates which are alternately stacked, positive tabs are arranged on the top surfaces of the positive plates, negative tabs are arranged on the top surfaces of the negative plates, and the positive tabs in the same plate group are connected in series through a positive busbar. The negative tabs in the same plate group are connected in series through a negative busbar, and the width of the positive busbar is larger than that of the negative busbar. According to the lead storage battery structure capable of preventing the tab cast-weld overmelting, the width of the positive busbar is designed to be wider than that of the negative busbar, so that the positive tab is thicker than the negative tab, hot melting can be balanced when the positive busbar and the negative busbar are formed by cast-weld, the positive tab can be fully welded, and the service life of the lead storage battery structure is prolonged. And the over-melting phenomenon of the negative tab is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid batteries, and in particular relates to a lead-acid battery structure capable of preventing over-melting of tab casting welding. Background Art

[0002] Lead-acid batteries generally include a battery slot, which is divided into multiple cells. Each cell is filled with a pole group, which is composed of a positive plate, a negative plate and a separator therebetween. The positive plate has a positive ear, and the negative plate has a negative ear. Each pole group has a positive bus and a negative bus that respectively connect all the positive plates and all the negative plates in series.

[0003] The battery pole group cast welding assembly is to weld multiple positive / negative plates together through a cast welding mold.

[0004] For example, the utility model with the authorization announcement number CN207199730U discloses a battery, wherein the pole group is composed of a positive plate, a negative plate and a separator therebetween, the positive plate has a positive ear, the negative plate has a negative ear, each pole group has a positive bus and a negative bus that respectively connect all the positive plates and all the negative plates in series, the thickness of the positive ear is greater than that of the negative ear; the thickness of the positive ear is 2.0 to 3.0 mm, and the thickness of the negative ear is 1.0 to 2.0 mm. The bus thickness is 7 to 9 mm.

[0005] However, due to the difference in thickness between the positive and negative lugs, the welding process will cause the positive and negative lugs to be welded asynchronously. Since the negative lug is thinner, the negative lug will often over-melt while the positive lug has not been completely welded, thus affecting the battery quality. Utility Model Content

[0006] The utility model aims at the above technical problems existing in the prior art and provides a lead-acid battery structure capable of preventing overmelting of the tab cast welding. With this structure, the heat melting can be balanced, the positive tab can be fully welded, and the negative tab will not overmelt.

[0007] A lead-acid battery structure capable of preventing overmelting of pole tab cast welding comprises a pole group, wherein the pole group comprises a plurality of alternately stacked positive plates and negative plates, wherein the top surface of the positive plate has a positive pole tab, and the top surface of the negative plate has a negative pole tab, wherein the positive pole tabs in the same pole group are connected in series by a positive pole bus, and the negative pole tabs in the same pole group are connected in series by a negative pole bus, and the width of the positive pole bus is wider than that of the negative pole bus.

[0008] Preferably, the width of the positive electrode bus bar is 1 to 3 mm wider than that of the negative electrode bus bar.

[0009] Preferably, the lead-acid battery structure capable of preventing overmelting of the tab cast welding comprises a plurality of pole groups, and adjacent pole groups are connected in series via one of the positive electrode bus and the negative electrode bus.

[0010] More preferably, the lead-acid battery structure capable of preventing overmelting of the tab cast welding further comprises a battery slot and a battery cover covering each other, wherein the battery slot is divided into a plurality of cells by a partition plate, and each cell is provided with a pole group;

[0011] The bottom surface of the battery cover has a positive busbar receiving groove for receiving a positive busbar and a negative busbar receiving groove for receiving a negative busbar, and the width of the positive busbar receiving groove is wider than that of the negative busbar receiving groove.

[0012] More preferably, the width of the positive electrode bus bar accommodating groove is 1 to 3 mm wider than the width of the negative electrode bus bar accommodating groove.

[0013] More preferably, the positive busbar and the negative busbar are connected in a direct connection manner, and the positive busbar and the negative busbar are located higher than the top surface of the separator.

[0014] The utility model can prevent the lead-acid battery structure from overmelting during cast welding of the pole ear. The width of the positive electrode bus is designed to be wider than that of the negative electrode bus, so that the positive electrode ear is thicker than the negative electrode ear. When the positive electrode bus and the negative electrode bus are formed by cast welding, the heat melting can be balanced, the positive electrode ear can be fully welded, and the negative electrode ear will not overmelt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the top view of the structure of each busbar in the pole group in the lead-acid battery structure of the utility model.

[0016] Figure 2 The utility model is a schematic diagram of the matching structure of the busbar and the battery slot in the lead-acid battery structure.

[0017] Figure 3 It is a schematic diagram of the bottom view of the battery cover in the lead-acid battery structure of the utility model.

[0018] Figure numerals: battery container 1, battery cover 2, electrode group 3, positive electrode ear 4, negative electrode ear 5, positive electrode bus 6, negative electrode bus 7, positive electrode bus accommodating groove 8, negative electrode bus accommodating groove 9. DETAILED DESCRIPTION

[0019] like Figures 1 to 3 As shown, a lead-acid battery structure capable of preventing over-melting of the tab cast welding comprises a battery container 1 and a battery cover 2 covering each other, wherein the battery container 1 is divided into a plurality of cells by a partition plate, and a pole group 3 is arranged in each cell.

[0020] like Figure 2In the illustrated structure, the battery slot 1 is divided into 6 cells, which are arranged in a 1×6 manner. Of course, the cells in the battery slot can also be arranged in a 2×3 manner. The number of cells in the battery slot can also be other, such as 1 or 3.

[0021] Each pole group 3 includes a plurality of alternately stacked positive plates and negative plates, and a separator is used between the positive plates and the negative plates to separate the plates to avoid short circuit. The top surface of the positive plate has a positive electrode ear 4, and the top surface of the negative plate has a negative electrode ear 5. The positive electrode ears 4 in the same pole group 3 are connected in series by a positive electrode bus 6, and the negative electrode ears 5 in the same pole group 3 are connected in series by a negative electrode bus 7. The width of the positive electrode bus 6 is wider than that of the negative electrode bus 7.

[0022] Specifically, how much wider the width of the positive busbar 6 is than the width of the negative busbar 7 can be determined according to the actual specifications of the lead-acid battery. If the battery itself is large and the busbar is wide, the difference between the width of the positive busbar and the width of the negative busbar can be set larger. Conversely, the difference can be set smaller. In short, the principle to be followed is to balance the heat melting when the positive busbar and the negative busbar are cast and welded during the cast welding process as much as possible, so that the positive ear can be fully welded and the negative ear will not be over-melted. Specifically, for general lead-acid batteries, the width of the positive busbar is 1 to 3 mm wider than the width of the negative busbar.

[0023] like Figure 1 and 2 As shown, for a lead-acid battery including a plurality of pole groups 3, adjacent pole groups 3 are connected in series through one of the positive pole busbars 6 and the negative pole busbar 7. The positive pole busbar 6 and the negative pole busbar 7 located at the head and tail are used to connect the positive pole column and the negative pole column. Preferably, the positive pole busbar 6 and the negative pole busbar 7 are connected in a direct connection manner, and the positions of the positive pole busbar 6 and the negative pole busbar 7 are higher than the top surface of the partition plate.

[0024] like Figure 3 The bottom surface of the battery cover 2 in the lead-acid battery structure of the utility model is shown. The bottom surface of the battery cover 2 has a positive busbar accommodating groove 8 for accommodating the positive busbar 6 and a negative busbar accommodating groove 9 for accommodating the negative busbar 7. The width of the positive busbar accommodating groove 8 is wider than that of the negative busbar accommodating groove 9. Preferably, the width of the positive busbar accommodating groove 8 is 1 to 3 mm wider than that of the negative busbar accommodating groove 9.

[0025] The utility model can prevent the lead-acid battery structure from overmelting during cast welding of the pole ear. The width of the positive electrode bus is designed to be wider than that of the negative electrode bus, so that the positive electrode ear is thicker than the negative electrode ear. When the positive electrode bus and the negative electrode bus are formed by cast welding, the heat melting can be balanced, the positive electrode ear can be fully welded, and the negative electrode ear will not overmelt.

Claims

1. A lead-acid battery structure capable of preventing overmelting of tab cast welding, comprising a pole group, the pole group comprising a plurality of alternately stacked positive plates and negative plates, the top surface of the positive plate having a positive tab, the top surface of the negative plate having a negative tab, the positive tabs in the same pole group being connected in series by a positive bus bar, and the negative tabs in the same pole group being connected in series by a negative bus bar, characterized in that: The width of the positive electrode bus bar is wider than the width of the negative electrode bus bar.

2. The lead-acid battery structure capable of preventing overmelting of the tab casting welding according to claim 1, characterized in that: The width of the positive electrode bus bar is 1 to 3 mm wider than that of the negative electrode bus bar.

3. The lead-acid battery structure capable of preventing overmelting of the tab casting welding according to claim 1, characterized in that: It includes a plurality of pole groups, and adjacent pole groups are connected in series via a positive electrode bus and a negative electrode bus.

4. The lead-acid battery structure capable of preventing overmelting of the tab casting welding according to claim 3 is characterized in that: It also includes a battery slot and a battery cover that cover each other, wherein the battery slot is divided into a plurality of cells by a partition plate, and each cell has a pole group; The bottom surface of the battery cover has a positive busbar receiving groove for receiving a positive busbar and a negative busbar receiving groove for receiving a negative busbar, and the width of the positive busbar receiving groove is wider than that of the negative busbar receiving groove.

5. The lead-acid battery structure capable of preventing overmelting of the tab casting welding according to claim 4, characterized in that: The width of the positive electrode bus bar accommodating groove is 1 to 3 mm wider than the width of the negative electrode bus bar accommodating groove.

6. The lead-acid battery structure capable of preventing overmelting of the tab casting welding according to claim 4, characterized in that: The positive busbar and the negative busbar are connected in a direct connection manner, and the positive busbar and the negative busbar are located higher than the top surface of the partition plate.

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