Lead-acid storage battery

Abstract

The utility model discloses a lead-acid storage battery which comprises a battery shell, separators are arranged in the battery shell, a cavity of the battery shell is divided into a plurality of groups of cavities by the separators, a group of pole groups is arranged in each group of cavities, and each pole group comprises a plurality of groups of positive plates, a plurality of groups of negative plates and a plurality of groups of partition plates, according to the utility model, the positive electrode lug and the negative electrode lug are respectively arranged at the edges of the positive electrode plate and the negative electrode plate, so that the connection distance between the positive electrode busbar and the positive electrode butt welding piece and the distance between the negative electrode busbar and the negative electrode butt welding piece can be effectively reduced; the lead consumption is reduced, the weight of the battery is reduced to a certain extent, and when the battery is vibrated, the mass distribution of the whole battery is more concentrated because the connection distance is shortened, and the inertia moment caused by vibration is reduced, so that the battery is more stable when being subjected to external impact or vibration.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery technology, and in particular to a lead-acid battery. Background Technology

[0002] Lead-acid batteries are a type of acidic battery. Their positive electrode is lead dioxide, their negative electrode is spongy lead, and their electrolyte is an aqueous sulfuric acid solution. The separator or diaphragm is made of microporous rubber, microporous plastic, or other materials depending on the type of lead-acid battery. The battery casing is made of materials such as hard rubber, engineering plastics, and fiberglass.

[0003] In existing batteries, the tabs are located in the upper middle part of the plates, resulting in an excessively long connection distance between the busbar and the welding components. This leads to a heavy battery and low shock resistance. Therefore, there is an urgent need for a new type of lead-acid battery to solve this problem. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] A lead-acid battery includes a battery casing. A separator is provided inside the battery casing to divide the cavity of the battery casing into multiple sets of chambers. Each set of chambers contains a group of electrodes. The group of electrodes includes multiple sets of positive plates, multiple sets of negative plates, and multiple sets of separators. The separators are disposed between the positive plates and the negative plates. Positive electrode tabs and negative electrode tabs are respectively provided at the top edges of the positive plates and the negative plates.

[0006] As an improvement to the above technical solution, the separator includes a set of horizontal plates and two sets of vertical plates, which are staggered inside the battery case to divide the battery case into multiple chambers.

[0007] As an improvement to the above technical solution, multiple sets of positive electrode plates are welded together to form a positive electrode busbar, and multiple sets of negative electrode plates are welded together to form a negative electrode busbar. A positive electrode butt welding component is provided on the top of the positive electrode busbar, and a negative electrode butt welding component is provided on the top of the negative electrode busbar. Multiple sets of positive electrode butt welding components are connected in series to form a positive electrode post, and multiple sets of negative electrode butt welding components are connected in series to form a negative electrode post.

[0008] As an improvement to the above technical solution, the top of the battery casing is provided with a cover, and a positive terminal and a negative terminal are respectively provided at one end of the top of the cover. The positive terminal is connected to the positive terminal post, and the negative terminal is connected to the negative terminal post.

[0009] The beneficial effects of this utility model are:

[0010] By placing the positive and negative electrode tabs at the edges of the positive and negative plates respectively, the connection distance between the positive busbar and the positive electrode butt welding component, as well as the distance between the negative busbar and the negative electrode butt welding component, can be effectively reduced. This reduces the amount of lead used, lightens the weight of the battery to some extent, and when the battery is subjected to vibration, the shortened connection distance makes the mass distribution of the entire battery more concentrated, reducing the inertial torque caused by vibration, making the battery more stable when subjected to external impact or vibration. Attached Figure Description

[0011] Figure 1 This is a front view of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the battery casing of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the pole group of this utility model.

[0014] Reference numerals: 10. Battery casing; 11. Horizontal plate; 12. Vertical plate; 20. Cover; 21. Positive terminal; 22. Negative terminal; 30. Electrode group; 31. Positive plate; 32. Positive electrode tab; 33. Positive busbar; 34. Positive electrode butt welding piece; 35. Negative busbar; 36. Negative electrode butt welding piece; 37. Negative plate; 38. Separator; 39. Negative electrode tab. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] A lead-acid battery includes a battery casing 10. A separator is provided inside the battery casing 10, dividing the cavity of the battery casing 10 into multiple chambers. Each chamber contains a group of electrodes 30, which includes multiple positive electrode plates 31, multiple negative electrode plates 37, and multiple separators 38. The separators 38 are disposed between the positive electrode plates 31 and the negative electrode plates 37. The top edges of the positive electrode plates 31 and the negative electrode plates 37 are respectively provided with… It has a positive electrode tab 32 and a negative electrode tab 39. Multiple sets of the positive electrode plates 31 are welded together to form a positive electrode busbar 33 through the positive electrode tab 32. Multiple sets of the negative electrode plates 37 are welded together to form a negative electrode busbar 35 through the negative electrode tab 39. A positive electrode butt welding component 34 is provided on the top of the positive electrode busbar 33. A negative electrode butt welding component 36 is provided on the top of the negative electrode busbar 35. Multiple sets of the positive electrode butt welding components 34 are connected in series to form a positive electrode post. Multiple sets of the negative electrode butt welding components 36 are connected in series to form a negative electrode post.

[0017] The separator 38 isolates the positive electrode plate 31 and the negative electrode plate 37 to prevent short circuits while allowing ions in the electrolyte to pass freely, ensuring the electrochemical reaction proceeds. The positive electrode tabs 32 and 39 are located at the top edge; their function is to connect the individual positive electrode plates 31 and 37 to form a single electrode. During battery charging and discharging, current is conducted between the positive electrode plates 31 and 37 through the positive electrode tabs 32 and 39, connecting the entire electrode group to the external circuit, allowing electrons to pass between the plates and the external environment. The smooth transfer between loads ensures the continuity and efficiency of the charging and discharging reaction. The positive electrode welding piece 34 set on the top of the positive electrode bus 33 and the negative electrode welding piece 36 set on the top of the negative electrode bus 35 are used to connect the busbars of each electrode group, so that the positive and negative electrodes of the entire battery can be stably connected to the external circuit, ensuring that the current can flow smoothly into and out of the battery. After the electrode group 30 is assembled in the battery case 10, the negative electrode welding pieces and positive electrode welding pieces of adjacent chambers are welded together by through-wall welding, so that multiple chambers are connected in series.

[0018] In traditional battery structure designs, the tabs are often located in the upper middle part of the plates. When performing series connection operations between adjacent chambers, in order to successfully perform through-wall welding to achieve the series connection, the positive electrode butt welding piece 34 or the negative electrode butt welding piece 36 in the chamber must be tightly attached to the inner wall of the chamber. As a result, the positive electrode bus 33 and the negative electrode bus 35, being located in the middle of the electrode group, are far from the inner wall of the chamber. This inevitably leads to a significant increase in the connection distance between the positive electrode bus 33 and the positive electrode butt welding piece 34, and between the negative electrode bus 35 and the negative electrode butt welding piece 36. In this application, the positive electrode tab 32 and the negative electrode tab 39 are respectively located at the edges of the positive electrode plate 31 and the negative electrode plate 37, so that the positive electrode bus 33 and the negative electrode bus 35 can be closer to the inner wall of the chamber. This reduces the connection distance between the positive busbar 33 and the positive electrode butt welding piece 34, and between the negative busbar 35 and the negative electrode butt welding piece 36. Since the positive busbar 33 or the negative busbar 35 is usually made of lead, the length of the positive busbar 33 or the negative busbar 35 can be reduced accordingly due to the shortened connection distance, effectively reducing the amount of lead used. This not only reduces costs but also reduces the weight of the battery to some extent. Providing positive electrode tabs 32 or negative electrode tabs 39 at the edge can make the internal structure of the battery more compact and stable. When the battery is vibrated, the mass distribution of the entire battery is more concentrated due to the shortened connection distance, reducing the inertial torque caused by vibration, making the battery more stable when subjected to external impact or vibration.

[0019] In one embodiment, reference Figure 2The separator includes a set of horizontal plates 11 and two sets of vertical plates 12. The horizontal plates 11 and the two sets of vertical plates 12 are staggered inside the battery case 10 to divide the battery case 10 into multiple chambers. The division of the chambers also has a positive effect on the distribution of electrolyte and heat dissipation. The electrolyte can more evenly wet the electrode groups 30 in each chamber, ensuring that each electrode group 30 can fully participate in the electrochemical reaction. At the same time, the heat generated during battery charging and discharging can also be dispersed and conducted between the chambers to a certain extent, avoiding local overheating.

[0020] In one embodiment, reference Figure 1 The battery casing 10 has a cover 20 on its top. One end of the top of the cover 20 has a positive terminal 21 and a negative terminal 22. The positive terminal 21 is connected to the positive terminal, and the negative terminal 22 is connected to the negative terminal. The cover 20 and the battery casing 10 are heat-sealed together to seal the internal structure of the battery. The positive terminal 21 and the negative terminal 22 on its top end are the interfaces for connecting the battery to external devices. The positive terminal 21 is welded to the positive terminal, and the negative terminal 22 is welded to the negative terminal.

[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A lead-acid battery, characterized in that, The battery includes a battery casing (10), which is provided with a separator that divides the cavity of the battery casing (10) into multiple chambers. Each chamber is provided with a group of electrodes (30). The group of electrodes (30) includes multiple positive plates (31), multiple negative plates (37), and multiple separators (38). The separators (38) are disposed between the positive plates (31) and the negative plates (37). Positive electrode tabs (32) and negative electrode tabs (39) are respectively provided at the top edges of the positive plates (31) and the negative plates (37).

2. The lead-acid battery according to claim 1, characterized in that: The separator includes a set of horizontal plates (11) and two sets of vertical plates (12), which are staggered inside the battery case (10) to divide the battery case (10) into multiple chambers.

3. A lead-acid battery according to claim 2, characterized in that: Multiple sets of positive electrode plates (31) are welded together to form a positive electrode busbar (33) via positive electrode tabs (32), and multiple sets of negative electrode plates (37) are welded together to form a negative electrode busbar (35) via negative electrode tabs (39). A positive electrode butt welding piece (34) is provided on the top of the positive electrode busbar (33), and a negative electrode butt welding piece (36) is provided on the top of the negative electrode busbar (35). Multiple sets of positive electrode butt welding pieces (34) are connected in series to form a positive electrode post, and multiple sets of negative electrode butt welding pieces (36) are connected in series to form a negative electrode post.

4. A lead-acid battery according to claim 3, characterized in that: The top of the battery casing (10) is provided with a cover (20), and a positive terminal (21) and a negative terminal (22) are respectively provided at one end of the top of the cover (20). The positive terminal (21) is connected to the positive terminal post, and the negative terminal (22) is connected to the negative terminal post.

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