Lightweight flooded battery for new energy vehicle

Abstract

The utility model discloses a new energy vehicle lightweight flooded battery, which comprises a battery case and a pole group, the pole group comprises a plurality of pole groups, a plurality of cavities are arranged in the battery case, ribs are arranged on two sides of the side wall of each cavity, each pole group is arranged in one cavity, the pole groups are in interference fit with the cavities, and the pole groups are arranged in the cavities. Due to the adoption of the thick polar plates, the use amount of grids in the battery can be reduced, the lead consumption can be reduced, and due to the fact that the appearance size of the battery shell is not changed and the number of the polar plates in a single grid is reduced, the battery shell is relatively open, and the battery shell is not easy to deform. The effective size of the interior of the cavity can be reduced by matching with the ribs on the side wall of the cavity, so that the pole group is tightly assembled in the battery shell, the problems of overlarge internal space, shaking of the pole plate and falling of active substances are prevented, the weight of the battery is reduced by 8% under the conditions that the appearance size of the battery shell is not changed and the service life of the storage battery is prolonged, and the use requirement of a new energy vehicle is met.

Description

Technical Field

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

[0002] In recent years, in response to the national call, more and more car companies have invested in the development of new energy vehicles. The operating environment and conditions of lead-acid batteries in new energy vehicles have changed compared with traditional fuel vehicles. Compared with traditional fuel vehicles, the operating temperature of starting lead-acid batteries in new energy vehicles is not high, and there is no need to start the combustion engine. Therefore, high CCA is not required. In order to ensure the range, new energy vehicles need to make various components lightweight, which requires changes to the design of lead-acid batteries to adapt to the operating conditions of new energy vehicles.

[0003] Lead-acid batteries have a low specific energy. To meet the power demand of vehicles and reduce battery weight by more than 5% while keeping the overall battery size unchanged, and at the same time improve the cycle capacity and service life of flooded lead-acid batteries to provide a more continuous and longer-lasting energy supply for new energy vehicles, a lightweight flooded battery for new energy vehicles is urgently needed 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 lightweight flooded battery for new energy vehicles includes a battery casing and an electrode group. The electrode group includes multiple electrode groups. The battery casing has multiple sets of chambers. Ribs are arranged on both sides of the sidewalls of the chambers. Each electrode group is placed in a set of chambers. The electrode group and the chamber are interference-fitted. Each electrode group includes multiple positive plates, multiple negative plates and multiple separators. The separators are disposed between the positive plates and the negative plates. Each positive plate and negative plate has a grid inside. The grid has several vertically interwoven longitudinal ribs and transverse ribs forming several large grids.

[0006] As an improvement to the above technical solution, it also includes a large battery cover and a small battery cover that is heat-sealed to the large battery cover. The large battery cover and the battery shell are heat-sealed together, and a handle is installed on the large battery cover.

[0007] As an improvement to the above technical solution, the size of the large grid of the plate grid is 12mm×7mm.

[0008] As an improvement to the above technical solution, multiple positive plates are welded together to form a positive busbar, and multiple negative plates are welded together to form a negative busbar. A positive electrode butt welding component is provided at the end of the positive busbar, and a negative electrode butt welding component is provided at the end of the negative 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.

[0009] As an improvement to the above technical solution, the partition is a PE glass fiber layer composite partition.

[0010] The beneficial effects of this utility model are:

[0011] By using thicker plates, the amount of grid material used in the battery can be reduced, thus lowering lead loss. Since the battery casing dimensions remain unchanged, the reduced number of plates per cell creates more internal space. Combined with ribs on the side walls of the chamber, this further reduces the effective internal size of the chamber, allowing the electrode group to be tightly assembled within the battery casing. This prevents problems such as plate movement and active material shedding due to excessive internal space. While maintaining the same battery casing dimensions and improving battery life, the battery weight is reduced by up to 8%, meeting the needs of new energy vehicles. In short, while meeting the vehicle's power requirements, the reduced battery weight improves the range of new energy vehicles, extends battery life, and lowers costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the battery casing of this utility model;

[0014] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0015] Figure 4 This is a schematic diagram of the structure of the pole group of this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the plate grid of this utility model.

[0017] Reference numerals: 1. Battery casing; 2. Battery cover; 3. Battery cap; 4. Handle; 5. Positive terminal post; 6. Terminal group; 601. Positive plate; 602. Negative plate; 603. Separator; 604. Positive busbar; 605. Negative busbar; 606. Positive butt weld; 607. Negative butt weld; 7. Negative terminal post; 8. Rib. Detailed Implementation

[0018] 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.

[0019] A lightweight flooded battery for new energy vehicles includes a battery casing 1, a battery cover 2, and a battery cover 3 that is heat-sealed to the battery cover 2. The battery cover 2 and the battery casing 1 are heat-sealed together, and a handle 4 is installed on the battery cover 2.

[0020] The battery casing 1 is sealed by the battery cover 2 to prevent moisture, dust and impurities from the external environment from entering the battery. The handle 4 makes it easy to take out the battery.

[0021] Electrode group 6 includes multiple electrode groups. Multiple chambers are formed inside the battery casing 1. Ribs 8 are arranged on both sides of the sidewall of each chamber. Each electrode group is placed in one chamber. The electrode group and the chamber are interference-fitted. Each electrode group includes multiple positive electrode plates 601, multiple negative electrode plates 602, and multiple separators 603. The separators 603 are disposed between the positive electrode plates 601 and the negative electrode plates 602. Multiple positive electrode plates 601 are welded together to form a positive electrode busbar 604 through positive electrode plate lugs. Multiple negative electrode plates 602 are welded together to form a negative electrode busbar 605 through negative electrode plate lugs. A positive electrode butt welding component 606 is provided at the end of the positive electrode busbar 604. A negative electrode butt welding component 607 is provided at the end of the negative electrode busbar 605. Multiple sets of positive electrode butt welding components 606 are connected in series to form a positive electrode post 5. Multiple sets of negative electrode butt welding components 607 are connected in series to form a negative electrode post 7.

[0022] After assembling the electrode group 6 in the battery casing 1, the positive electrode butt welding piece 606 and the negative electrode butt welding piece 607 of each chamber are welded together by through-wall welding, so that multiple chambers are connected in series. The battery cover 2 and the battery casing 1 are then heat-sealed together. Electrolyte is added for formation. After formation, the formed electrolyte is poured out, and a high-density electrolyte is added, referring to... Figure 1 The battery cover 2 and battery cover 3 are heat-sealed together, and the handle 4 is installed in the handle installation position reserved in the battery cover 2, thus completing the production of the entire battery.

[0023] The thickness of the positive electrode plate 601 is 1.91mm, and the thickness of the negative electrode plate 602 is 1.66mm. Compared with the traditional positive electrode plate thickness of 1.57mm and negative electrode plate thickness of 1.38mm, both the positive electrode plate 601 and the negative electrode plate 602 are thicker. Using thicker electrode plates reduces the amount of grid material used in the battery, thus reducing lead loss. Since the battery casing dimensions remain unchanged, the reduced number of electrode plates per cell results in a more spacious interior. Combined with the ribs 8 on the sidewalls of the chamber, this reduces the effective size of the chamber, allowing the electrode group to be tightly assembled within the battery casing 1. This prevents problems such as electrode plate movement and active material shedding due to excessive internal space. While maintaining the same battery casing dimensions and improving battery life, the battery weight is reduced by up to 8%, meeting the needs of new energy vehicles. This approach reduces battery weight, improves the range of new energy vehicles, extends battery life, and reduces costs while meeting the vehicle's power requirements.

[0024] In one embodiment, each of the positive electrode plate 601 and negative electrode plate 602 is provided with a grid. The grid has a number of vertically interwoven longitudinal ribs and transverse ribs forming a number of large grids. The size of the large grid is 12mm×7mm. The grid thickness is increased by 0.1mm compared to the traditional grid, which improves the grid's corrosion resistance. Since a large current discharge capability is not required, a large grid design is adopted.

[0025] In one embodiment, the separator 603 is a PE glass fiber composite separator. In order to increase the battery life, a PE glass fiber composite separator is used. Compared with a conventional separator, the PE glass fiber composite separator has an additional PE layer, which increases the thickness of the electrode group. Combined with the newly designed battery case with internal ribs, the electrode group is interference-fitted in the battery case 1.

[0026] 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 lightweight flooded battery for new energy vehicles, characterized in that, The battery includes a battery casing (1) and an electrode group (6). The electrode group (6) includes multiple electrode groups. The battery casing (1) has multiple sets of chambers. Ribs (8) are arranged on both sides of the sidewall of the chamber. Each electrode group is placed in a set of chambers. The electrode group is interference-fitted with the chamber. Each electrode group includes multiple positive plates (601), multiple negative plates (602) and multiple separators (603). The separators (603) are disposed between the positive plates (601) and the negative plates (602). Each set of positive plates (601) and negative plates (602) is provided with a grid. The grid surface is provided with several vertically interwoven longitudinal ribs and transverse ribs to form several large grids.

2. The lightweight flooded battery for new energy vehicles according to claim 1, characterized in that: It also includes a battery cover (2) and a battery cover (3) that is heat-sealed to the battery cover (2). The battery cover (2) and the battery shell (1) are heat-sealed together. A handle (4) is installed on the battery cover (2).

3. A lightweight flooded battery for new energy vehicles according to claim 1, characterized in that: The size of the large grid of the plate is 12mm × 7mm.

4. A lightweight flooded battery for new energy vehicles according to claim 1, characterized in that: Multiple positive electrode plates (601) are welded together to form a positive electrode busbar (604) through positive electrode plate lugs, and multiple negative electrode plates (602) are welded together to form a negative electrode busbar (605) through negative electrode plate lugs. A positive electrode butt welding component (606) is provided at the end of the positive electrode busbar (604), and a negative electrode butt welding component (607) is provided at the end of the negative electrode busbar (605). Multiple sets of positive electrode butt welding components (606) are connected in series to form a positive electrode post (5), and multiple sets of negative electrode butt welding components (607) are connected in series to form a negative electrode post.

5. A lightweight flooded battery for new energy vehicles according to claim 1, characterized in that: The partition (603) is a PE glass fiber composite partition.

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