Grid suitable for storage battery and storage battery

Abstract

The utility model relates to the field of electric energy design, in particular to a grid structure design of a storage battery. According to the technical scheme, the grid suitable for the storage battery comprises a frame and tabs arranged on the frame, transverse ribs and vertical ribs are arranged in the frame, the grid forms a plurality of layers of partitions in the height direction, and the transverse ribs and the vertical ribs are arranged in the frame. The distance between the vertical ribs in each layer of partition is smaller than the distance between the vertical ribs in the upper layer of partition. According to the grid suitable for the storage battery and the storage battery, the utilization rate of the whole grid and the utilization rate of lead plaster attached to the whole grid are integrally improved by optimizing the structure of the grid, the loss rate of each position is balanced, and the service life of the whole grid is optimized.

Description

Technical Field

[0001] The utility model relates to the field of electric energy design, in particular to the grid structure design of a storage battery. Background Art

[0002] A battery is a device that can convert electrical energy into chemical energy and convert the chemical energy back into electrical energy when needed. It usually consists of one or more electrochemical cells and can store electrical energy without an external power source. As an important energy storage device, batteries have a wide range of applications in modern society, such as electric transportation, household appliances, and industrial automation.

[0003] The battery consists of a casing, connectors, electrolyte and plates, where the chemical reactions for storing and releasing electrical energy take place. The grid is a grid-like structure used to support and fix the positive and negative plates, which is usually made of conductive materials such as lead, lead alloys or other metal materials. On the one hand, the grid acts as a carrier of the active material, keeping the active material attached and giving the plate a certain shape; on the other hand, the grid conducts current so that the current is distributed as evenly as possible in every part of the active material, forming a relatively uniform conductor.

[0004] For example, a Chinese patent document with the announcement number CN 209675402 discloses a grid, which includes three parts: a main body, a tab and an outer frame, and the tab is located above the main body. Among them, the main body includes a plurality of horizontal ribs and a plurality of vertical ribs, which are interlaced with each other to form a plurality of grid structures. Lead paste, as a common active substance, is applied on these grid structures. The horizontal ribs mainly play the role of supporting the lead paste, and the vertical ribs mainly play the role of conducting current.

[0005] However, this technical solution has certain technical defects. During the use of the battery, the current formed by the active material needs to reach the vertical ribs near it, and then be transmitted from bottom to top along the vertical ribs to reach the upper pole ear position, which serves as the output port of the current. In this process, the active material at the top is closer to the pole ear in the height direction, the resistance to current transmission is small, and the current is easier to form, so the use efficiency of the active material and the vertical ribs above is higher. The active material at the bottom is farther away from the pole ear in the height direction, the resistance to current transmission is large, and the difficulty of current formation is relatively large, so the utilization rate of the active material and the vertical ribs below is low.

[0006] Such upper and lower imbalance not only results in low utilization of the grid and active materials, but also makes the upper grid and lead paste more susceptible to wear and corrosion. The grid wear in the upper and lower areas is uneven, and the service life of the product is not ideal. Utility Model Content

[0007] The purpose of the utility model is to provide a grid suitable for a battery and a battery, wherein the utilization rate of the entire grid and the lead paste attached thereto is improved as a whole through optimization of the grid structure, the loss rate at each position is balanced, and the overall service life is optimized.

[0008] The above technical purpose of the utility model is achieved through the following technical scheme: a grid suitable for a battery, comprising a frame and a pole ear arranged on the frame, wherein the frame is provided with horizontal ribs and vertical ribs, and the grid forms multiple layers of partitions in the height direction, and the spacing between each of the vertical ribs in each layer of partition is smaller than the spacing between each of the vertical ribs in the previous layer of partition.

[0009] As a preferred embodiment of the present invention, the number of partitions is greater than or equal to 3.

[0010] As a preferred embodiment of the present invention, the cross-sectional size of the vertical ribs in each partition layer is greater than the cross-sectional size of the vertical ribs in the next partition layer.

[0011] As a preferred embodiment of the present invention, the vertical spacing between the transverse ribs in each partition layer is greater than the vertical spacing between the transverse ribs in the previous partition layer.

[0012] As a preferred embodiment of the present invention, each transverse rib in a layer is evenly distributed, and each vertical rib in each layer is evenly distributed.

[0013] As a preferred embodiment of the present invention, the cross-sections of the vertical ribs and the horizontal ribs are circular or diamond-shaped.

[0014] As a preferred embodiment of the present invention, the width dimension of the cross section of the vertical ribs and the horizontal ribs is greater than or equal to 0.7 mm.

[0015] As a preferred embodiment of the present invention, the frame is provided with rounded corners at four corners.

[0016] A storage battery comprises a shell and a connector, and also comprises a grid suitable for the storage battery.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. The electrons in the bottom area have a shorter horizontal distance to reach the vertical ribs because the vertical ribs in the area are more densely arranged, which makes it easier for the electrons to reach the vertical ribs, thereby reducing the difficulty of current formation. Furthermore, the utilization efficiency of the active materials in the bottom area is improved, and the utilization rate of the vertical ribs in this part is also improved.

[0019] 2. The vertical spacing of the horizontal reinforcement of the lower partition is larger. This is because the horizontal spacing of the vertical reinforcement of the lower partition is already smaller. Such a setting can ensure that the area of ​​each rectangular space in the lower partition is appropriate and not too small, thereby avoiding the problem of difficulty in applying lead paste caused by too small rectangular space.

[0020] 3. The thickness of the vertical bars in the upper partition should be thicker than that in the lower partition. Since more current passes through the vertical bars in the upper partition, setting a larger thickness will be beneficial to the integrity of the current.

[0021] 4. The horizontal and vertical ribs can be made of quadrangular prisms or cylinders, which can make the thickness of the active material on the rib symmetrical with its own structural center after applying the paste, which is more conducive to the uniformity of the conductive system from the active material to the rib. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of embodiment 1.

[0023] In the figure:

[0024] 1. Frame, 11. Rounded corners, 2. Ears, 3. Horizontal ribs, 4. Vertical ribs, A1. Partition one, A2. Partition two, A3. Partition three. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0027] Embodiment 1, as Figure 1 As shown, a grid suitable for a battery comprises a frame 1 and a tab 2 arranged on the frame 1. The tab is arranged above the frame 1 and is an output port for current. The four corners of the frame 1 are rounded corners 11 processed by arcs.

[0028] The entire grid is divided into multiple layers in the vertical direction. The number of layers of the partition is determined according to the size of the actual product, but the number of layers is greater than or equal to 3. It can be 3 layers, 4 layers, 5 layers, etc. In this embodiment, it is set to 3 layers. Figure 1 As shown, from top to bottom they are partition one A1, partition two A2 and partition three A3.

[0029] In each partition, a horizontal rib 3 and a vertical rib 4 are provided, which extend in the horizontal direction and the vertical direction respectively and are perpendicular to each other. The horizontal rib 3 and the vertical rib 4 form rectangular spaces.

[0030] In this case, the core is the gradual change of the vertical ribs 4. From top to bottom, the horizontal spacing of the vertical ribs 4 decreases in each layer. Figure 1 As shown, the horizontal spacing of the vertical ribs 4 in the partition three A3 is the smallest, the horizontal spacing of the vertical ribs 4 in the partition two A2 is the second largest, and the horizontal spacing in the partition one A1 is the largest.

[0031] The electrons formed by the active material in the bottom area are more difficult to reach the corresponding vertical ribs, which results in difficulty in forming current and low efficiency of lead paste. In this case, the electrons in the bottom area have a smaller horizontal distance to reach the vertical ribs 4, which is easier, since the vertical ribs 4 in the area are more densely arranged, thus reducing the difficulty of current formation. Furthermore, the utilization efficiency of the active material in the bottom area is improved, and the utilization rate of the vertical ribs 4 in this part is also improved.

[0032] The engineering personnel determine the specific number of partitions and the spacing value of the vertical bars 4 in each partition by experiment. The adjustment result is preferably such that the current passing through the vertical bars 4 at all different heights in the entire grid is uniform.

[0033] The horizontal ribs 3 and vertical ribs 4 can be quadrangular prisms or cylinders, that is, the cross section is rhombus or circular. Such a setting can make the thickness of the active material on the rib symmetrical with its own structural center after the paste is applied, which is more conducive to the uniformity of the conductive system from the active material to the rib. If the cross section is circular, the diameter is greater than 0.7mm. If it is rhombus, its width dimension, that is, the diagonal distance between the two nearest corners is greater than 0.7mm. If it is lower than this value, its structural strength will be adversely affected.

[0034] In addition to the gradient design of the spacing of the vertical ribs 4, the spacing of the horizontal ribs 3 and the thickness of the vertical ribs 4 are also gradiently designed. The thickness of the vertical ribs 4 in the upper partition is thicker than that in the lower partition. This is because more current passes through the vertical ribs 4 in the upper partition, and setting a larger thickness will be beneficial to the integrity of the current passing. The vertical spacing of the horizontal ribs 3 in the lower partition is larger. This is because the horizontal spacing of the vertical ribs 4 in the lower partition is already smaller. Such a setting can ensure that the area of ​​each rectangular space in the lower partition is appropriate and not too small, thereby avoiding the problem of difficult lead paste application caused by too small rectangular space.

[0035] A storage battery comprises a housing and a connector, and also comprises the above-mentioned grid suitable for the storage battery.

Claims

1. A grid suitable for a battery, comprising a frame (1) and a pole ear (2) arranged on the frame (1), wherein the frame (1) is provided with a horizontal rib (3) and a vertical rib (4), characterized in that: The grid forms multiple layers of partitions in the height direction, and the spacing between the vertical ribs (4) in each layer of partitions is smaller than the spacing between the vertical ribs (4) in the previous layer of partitions; in the partitions of the same layer, the vertical ribs (4) are evenly distributed in the horizontal direction, and in the same layer, the horizontal spacing between the vertical ribs (4) is the same; all the horizontal ribs (3) and all the vertical ribs (4) form a plurality of squares, and the vertical distance of each square is greater than the horizontal distance.

2. A grid suitable for a battery according to claim 1, characterized in that: The number of partitions is greater than or equal to 3.

3. A grid suitable for a battery according to claim 1, characterized in that: The cross-sectional dimensions of the vertical ribs (4) in each layer of partitions are greater than the cross-sectional dimensions of the vertical ribs (4) in the next layer of partitions.

4. A grid suitable for a battery according to claim 1, characterized in that: The vertical spacing between the transverse ribs (3) in each layer of partitions is greater than the vertical spacing between the transverse ribs (3) in the previous layer of partitions.

5. A grid suitable for a battery according to claim 1, characterized in that: The transverse reinforcements (3) in each layer are evenly spaced and distributed, and the vertical reinforcements (4) in each layer are evenly spaced and distributed.

6. A grid suitable for a battery according to any one of claims 1 to 5, characterized in that: The cross-sections of the vertical ribs (4) and the transverse ribs (3) are circular or rhombus-shaped.

7. A grid suitable for a battery according to any one of claims 1 to 5, characterized in that: The width of the cross section of the vertical rib (4) and the transverse rib (3) is greater than or equal to 0.7 mm.

8. A grid suitable for a battery according to any one of claims 1 to 5, characterized in that: The frame (1) is provided with rounded corners (11) at four corners.

9. A storage battery, comprising a housing and a connector, characterized in that it also comprises a grid suitable for a storage battery as described in any one of claims 1 to 8.

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