Foamed nickel plate, electrode plate manufacturing device using same, and electrode plate with lug
By designing a long strip-shaped foamed nickel plate with alternately arranged foamed nickel and smooth nickel belts, combined with a dedicated electrode plate production device, the electrode plate with ears is directly formed, which solves the problem of lengthy process and pollution in the prior art, and achieves the effect of simplifying the process and reducing costs.
Patent Information
- Application Number
- CN202421543727.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-02
AI Technical Summary
When preparing electrode plates, existing foamed nickel plates require additional ears and compaction forming, resulting in lengthy process and produce scraps and dust, causing environmental pollution and loss of active substances.
A long strip-shaped foamed nickel plate is designed, and the foamed nickel zone and the smooth nickel belt zone are arranged alternately along the length direction. A specific electrode plate production device is used to directly form the electrode plate with ears through coating, drying, calendering and slitting mechanisms, and the ultrasonic peeling and compaction forming process is omitted.
The process flow is simplified, the loss of active substances and the generation of powders is reduced, the cost and environmental pollution are reduced, and the health of employees is guaranteed.
Smart Images
Figure CN223092929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a foamed nickel plate, and more particularly to a foamed nickel plate suitable for preparing an electrode plate with ears, an electrode plate manufacturing device using the same, and an electrode plate with ears. Background Art
[0002] The foamed nickel plate has good adsorption performance and electrical conductivity, and is widely used in the fields of batteries, catalysts, sensors, etc. Especially in the battery field, as an electrode material, the foamed nickel plate plays a dual role of an electrode current collector and a carrier of active substances, which helps to improve the energy density and cycle life of the battery.
[0003] The foamed nickel plate can be prepared by various methods such as known sintering methods, foaming methods, vacuum vapor deposition methods, and electroplating methods. The existing foamed nickel plate (1) is usually in the form of a continuous long strip and is used as a base material in an electrode plate manufacturing device. It is entirely formed by a foamed nickel region (1a). After its surface is coated with a paste as an electrode active substance and dried, it is cut into a suitable size by a rolling and slitting mechanism and can be used as an electrode plate for a single battery.
[0004] The positive electrode plate of a nickel-metal hydride battery usually has ears, and these ears can be used as joints for spot welding of current collectors. Since the whole of the existing foamed nickel plate is a foamed nickel body and does not have ears, when using a whole large plate directly obtained by the existing preparation process of the foamed nickel plate, in order to facilitate subsequent spot welding of current collectors, it is necessary to additionally provide a local area (i.e., without a bottom) where the surface-coated active substance is peeled off; furthermore, due to the relatively soft texture of the foamed nickel plate itself, it is also necessary to go through processes such as compaction and molding before it has sufficient strength for spot welding. As a result, the entire process becomes lengthy, and scraps and flying dust are generated during the process of peeling off the active substance or cutting the foamed nickel plate, causing environmental pollution and loss and waste of active substances. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a novel foamed nickel plate suitable for manufacturing an electrode plate with ears. The purpose of the utility model is also to provide an electrode plate manufacturing device using the foamed nickel plate as a base material, and an electrode plate with ears manufactured by the electrode plate manufacturing device.
[0006] The foamed nickel plate of the utility model is characterized in that it is in the form of a long strip, and a plurality of foamed nickel regions (1a) and a plurality of smooth nickel strip regions (1b) are formed along the length direction, and the foamed nickel regions (1a) and the smooth nickel strip regions (1b) are alternately arranged in the width direction.
[0007] Preferably, the widths of the plurality of smooth nickel strip regions (1b) are the same and are 5 - 15 mm.
[0008] Preferably, the widths of the plurality of foamed nickel regions (1a) are the same, being 30 to 100 mm.
[0009] Preferably, two of the plurality of foamed nickel regions (1a) are located on both sides in the width direction of the foamed nickel plate (1).
[0010] Preferably, the widths of the foamed nickel regions (1a) located on both sides in the width direction of the foamed nickel plate (1) are half of the widths of the other foamed nickel regions (1a) among the plurality of foamed nickel regions (1a).
[0011] The electrode plate manufacturing apparatus of the present utility model is characterized in that it includes: a coating mechanism, a paste recovery mechanism, a drying mechanism, and a rolling and slitting mechanism.
[0012] The coating mechanism coats paste as electrode active material on the above-mentioned foamed nickel plate (1).
[0013] The paste recovery mechanism scrapes off and recycles the paste coated on the smooth nickel strip region (1b) by using a scraper.
[0014] The drying mechanism dries the paste coated on the foamed nickel region (1a).
[0015] The rolling and slitting mechanism rolls the dried paste and slits the foamed nickel plate (1) along the smooth nickel strip region (1b), thereby forming a plurality of electrode plates with ears.
[0016] Preferably, the rolling and slitting mechanism can slit the foamed nickel plate (1) along the midline of the smooth nickel strip region (1b).
[0017] The widths of the foamed nickel regions (1a) located on both sides in the width direction of the foamed nickel plate (1) are half of the widths of the other foamed nickel regions (1a) among the plurality of foamed nickel regions (1a).
[0018] The rolling and slitting mechanism can further slit along the midline of the other foamed nickel regions (1a), thereby forming a plurality of electrode plates with ears.
[0019] Preferably, the rolling and slitting mechanism can further slit the foamed nickel plate (1) along the width direction of the foamed nickel plate (1).
[0020] The electrode plate with ears of the present utility model is characterized in that it is an electrode plate manufactured according to the above-mentioned electrode plate manufacturing apparatus, and includes a main body part and ears.
[0021] The main body is formed by the foamed nickel region (1a), and the ear part is formed by the smooth nickel strip region (1b).
[0022] Preferably, the electrode plate with ears is the positive electrode plate used in a nickel-hydrogen battery.
[0023] Effect of the utility model
[0024] The foamed nickel plate of the present utility model alternately has a foamed nickel region and a smooth nickel strip region in the width direction. When such a foamed nickel plate is used as a base material, a large plate without a bottom can be directly manufactured without peeling the active material. In addition, since the material of the smooth nickel strip is harder than that of the foamed nickel, it can be directly used for spot welding. Therefore, processes such as compaction and molding are not required, and finished electrode plates can be directly obtained after slitting. While greatly simplifying the process, the powder loss during the peeling of the active material and the cutting of the foamed nickel plate is avoided, the cost is greatly reduced, and the factory dust can be reduced to ensure the health of employees. Description of the drawings
[0025] Figure 1 (A) is a schematic diagram showing the structure of a foamed nickel plate in the prior art. Figure 1 (B) is a schematic diagram showing the structure of the foamed nickel plate of the present utility model.
[0026] Figure 2 is a schematic diagram showing the preparation process of the current positive electrode process adopted by the electrode plate manufacturing device in the prior art.
[0027] Figure 3 is a schematic diagram showing the preparation process of the new positive electrode process adopted by the electrode plate manufacturing device of the present utility model. Detailed implementation manners
[0028] The foamed nickel plate (also called the nickel foam plate) is generally the raw material, i.e., the base material, for manufacturing the electrode plate of a battery. At present, the preparation methods of foamed nickel mainly include two types: chemical method and physical method. The chemical method uses a metal salt solution as the raw material, reacts in the pores of a polymer foam to generate metal hydroxide, and then reduces it to metal. The physical method uses a metal foam as a template, deposits nickel or nickel alloy on the surface of the template, and then dissolves the template from the surface.
[0029] The commonly used foamed nickel plate in the prior art is as shown in Figure 1 (A). The entire foamed nickel plate (1) is foamed nickel (1a). When such an entire foamed nickel is used to manufacture the electrode plate of a battery, since there is no ear part for the current collector spot welding joint, a region where the local active material needs to be peeled off to expose the base material needs to be specially set. For example, ultrasonic peeling and other means are used to peel off the active material at the edge to expose the bottomless part.
[0030] In contrast, the foamed nickel plate of the present utility model is characterized in that it is a strip-shaped nickel plate, and a plurality of strip-shaped foamed nickel regions and a plurality of strip-shaped smooth nickel strip regions are alternately arranged in the width direction of the nickel plate. By using such a new type of foamed nickel plate as the base material, an electrode plate without a bottom can be directly manufactured without peeling off the active material.
[0031] Next, with reference to the drawings, the specific form of the foamed nickel plate of the present utility model will be described.
[0032] Figure 1 (B) is a schematic diagram showing the structure of the foamed nickel plate of the present utility model.
[0033] As Figure 1 (B) shows, the foamed nickel plate (1) of the present utility model is in the form of a long strip, and a plurality of foamed nickel regions (1a) and a plurality of smooth nickel strip regions (1b) are formed along the length direction. The foamed nickel regions (1a) and the smooth nickel strip regions (1b) are alternately arranged in the width direction. Among them, the foamed nickel region (1a) is a region for supporting the active material, that is, the paste, and the smooth nickel strip region (1b) is a region for forming the plate ear described later.
[0034] The widths of the plurality of smooth nickel strip regions (1b) can be the same or different, depending on the required plate size, and are preferably 5 - 15 mm. In addition, the widths of the plurality of foamed nickel regions (1a) can also be the same or different, depending on the required plate size, and are preferably 30 - 100 mm.
[0035] The foamed nickel region (1a) and the smooth nickel strip region (1b) are long strip-shaped regions formed along the length direction of the foamed nickel plate (1), and each can have a plurality. Preferably, they are arranged symmetrically in the width direction of the foamed nickel plate (1), but they can also be arranged asymmetrically.
[0036] As a preferred embodiment, foamed nickel regions (1a) are provided on both sides in the width direction of the foamed nickel plate (1). In addition, one or more foamed nickel regions (1a) can also be provided at other positions including the central part in the width direction of the foamed nickel plate (1). Between two adjacent foamed nickel regions (1a), one smooth nickel strip region (1b) is formed.
[0037] In the subsequent electrode plate manufacturing process, it is preferable to slit the foamed nickel plate (1) in the smooth nickel strip region (1b). Regarding the specific cutting position of the smooth nickel strip region, it depends on the size and shape of the required electrode plate. The cutting line can be the midline of the smooth nickel strip region or the boundary line between the smooth nickel strip region and the foamed nickel region. When slitting along the midline or the boundary line of the smooth nickel strip region (1b), multiple electrode plates with smooth nickel strip regions (1b) as ears on one or both sides can be obtained.
[0038] At this time, the width of the foamed nickel regions (1a) on both sides in the width direction of the foamed nickel plate (1) is preferably half of the width of the other foamed nickel regions (1a). In this way, when slitting along the midline of the other foamed nickel regions (1a), two electrode plates with the same width can be formed at one time.
[0039] Due to the composite structure in which the foamed nickel regions (1a) and the smooth nickel strip regions (1b) are alternately formed, the foamed nickel plate of the present utility model can prepare electrode plates with ears on one or both sides through a simplified process flow.
[0040] Figure 2 It is a schematic diagram showing the preparation process of the current positive electrode process adopted by the electrode plate manufacturing device of the prior art.
[0041] As Figure 2 shown, the entire foamed nickel plate 1 is coated with paste as the electrode active material on the surface by a coating mechanism. After drying by a drying mechanism, part of the active material is peeled off by an ultrasonic peeling mechanism to form an uncoated part (without a bottom). Then, through rolling and slitting, a large plate with coated parts and uncoated parts alternately in the width direction is obtained. The uncoated part is cut along the length direction to slit the large plate into small plates, and multiple small plates with an uncoated part on one side are obtained. Finally, the uncoated part is formed into an ear without a bottom to form the finished positive electrode.
[0042] In the current positive electrode process, the paste is filled into the interior of the porous foamed nickel during the coating process and is difficult to peel off. Only ultrasonic waves can be used to shake off the active material, and the loss of the active material will occur when peeling off the powder and it cannot be recycled. In addition, since the substrate of the uncoated part is foamed nickel and the strength of the foamed nickel is insufficient, it is necessary to compact and form it to form an ear to meet the spot welding requirements. Therefore, the ultrasonic peeling process and the no-bottom forming process are two essential processes in the current positive electrode process.
[0043] By using the foamed nickel plate of the present utility model as the substrate, the electrode plate manufacturing device of the present utility model can directly omit the above two process steps.
[0044] The plate manufacturing device of the present utility model is characterized in that it comprises a coating mechanism, a paste recycling mechanism, a drying mechanism, a rolling and slitting mechanism. The coating mechanism coats paste on the foamed nickel plate of the present utility model as the electrode active material. The paste recycling mechanism scrapes off the paste coated on the smooth nickel strip area with a scraper and recycles it. The drying mechanism dries the paste coated on the foamed nickel area. The rolling and slitting mechanism rolls the dried paste and slits the foamed nickel plate along the smooth nickel strip area, thereby forming a plurality of electrode plates with ears.
[0045] Figure 3 It is a schematic diagram showing the preparation process of the new positive electrode process adopted by the electrode plate manufacturing device of the present utility model. In this new positive electrode process, the foamed nickel plate of the present utility model is used as the substrate.
[0046] As Figure 3 shown, the foamed nickel plate (1) of the present utility model successively passes through a coating process, an ear paste recycling process, a drying process, and a rolling and slitting process, without going through an ultrasonic peeling process and a bottomless forming process, and directly obtains a positive electrode plate with ears, that is, a finished positive electrode, with a simplified process flow.
[0047] Specifically, when filling the paste onto the surface of the foamed nickel plate (1), since the paste coated on the smooth nickel strip area (1b) can be easily scraped off with a scraper, the ultrasonic peeling process can be omitted. Moreover, the paste scraped off in this way can be directly recycled, greatly reducing the loss of the active material.
[0048] Furthermore, since the nickel strip in the smooth nickel strip area (1b) has a higher strength than the foamed nickel and the demand for spot welding can be met without improving the hardness of the bottomless part through a forming process, the bottomless forming process can be omitted, and an electrode plate with ears can be directly obtained, thereby further simplifying the process.
[0049] In the rolling and slitting mechanism, rolling and slitting can be carried out simultaneously or step by step.
[0050] The slitting mechanism can slit along the center line of the smooth nickel strip area (1b) (i.e., located in the center of the width direction). When the foamed nickel areas (1a) are located on both sides of the width direction of the nickel plate and the width of the foamed nickel area (1a) in other parts, such as the center, is relatively wide, about twice the width of the foamed nickel areas (1a) on both sides, the slitting mechanism can also slit along the center line of the other foamed nickel areas (1a) except for the two sides, so as to obtain a plurality of small plates with ears on one side with fewer steps.
[0051] In addition, the slitting mechanism can further slit the foamed nickel plate along the width direction of the foamed nickel plate (1), thereby forming a plurality of electrode plates with ears having a specified length.
[0052] The electrode plate with ears of the present utility model is an electrode plate manufactured according to the above-mentioned plate manufacturing device, including a main body part and ears. The main body part is formed by a foamed nickel region (1a), which is obtained by coating paste on the foamed nickel region and then drying and rolling. The ears are formed by a smooth nickel strip region (1b).
[0053] The small plates prepared by the above-mentioned new positive electrode process have appropriate sizes and have smooth nickel strip regions as ears on one or both sides. Therefore, they are suitable for use as the positive electrode plates with ears of nickel-metal hydride batteries.
[0054] The foamed nickel plate of the present utility model can be used in the manufacturing process of battery plates. The battery can be a square battery or a cylindrical battery, without particular limitation, and is preferably a nickel-metal hydride battery.
[0055] Above, the form in which the foamed nickel regions (1a) are located on both sides in the width direction is taken as an example for illustration, but it is not limited thereto. It can also be the form in which the smooth nickel strip regions (1b) are located on both sides in the width direction, or the form in which one side is the smooth nickel strip region (1b) and the other side is the foamed nickel region (1a). The widths of the smooth nickel strip region and the foamed nickel region can be the same or different respectively, which is determined according to the required plate size, and the cutting position can be the midline of the smooth nickel strip region or the boundary line between the smooth nickel strip region and the foamed nickel region.
[0056] Using the foamed nickel plate of the present utility model, a large plate without a bottom can be directly manufactured, and through processes such as drying, rolling, and cutting, a positive electrode plate with ears, that is, a finished plate, can be directly obtained. The process is greatly simplified and no peeling powder is generated. The cost is significantly reduced, and at the same time, the factory dust can be reduced, ensuring the life and health of employees.
[0057] Above, the foamed nickel plate of the present utility model has been described through the drawings and specific embodiments, but the present utility model is not limited to the above-mentioned specific embodiments. Various deformations or element changes can be made without departing from the gist of the present utility model, and these deformations or element changes are also included in the protection scope of the present utility model.
Claims
1. A foamed nickel plate, characterized in that: It is in the form of a long strip, and multiple foamed nickel regions (1a) and multiple smooth nickel strip regions (1b) are formed along the length direction. The foamed nickel regions (1a) and the smooth nickel strip regions (1b) are alternately arranged in the width direction.
2. The foamed nickel plate according to claim 1, wherein The width of the multiple smooth nickel strip regions (1b) is 5 - 15 mm.
3. The foamed nickel plate according to claim 1 or 2, characterized in that, The width of the multiple foamed nickel regions (1a) is 30 - 100 mm.
4. The foamed nickel plate according to claim 1 or 2, characterized in that, Two of the multiple foamed nickel regions (1a) are located on both sides of the foamed nickel plate (1) in the width direction.
5. The foamed nickel plate according to claim 4, wherein The width of the foamed nickel regions (1a) located on both sides of the foamed nickel plate (1) in the width direction is half of the width of the other foamed nickel regions (1a) among the multiple foamed nickel regions (1a).
6. A plate manufacturing device, characterized in that: It includes: a coating mechanism, a paste recovery mechanism, a drying mechanism, and a rolling and slitting mechanism. The coating mechanism coats paste as the electrode active material on the foamed nickel plate (1) according to any one of claims 1 - 5. The paste recovery mechanism scrapes off and recycles the paste coated on the smooth nickel strip region (1b) using a scraper. The drying mechanism dries the paste coated on the foamed nickel region (1a). The rolling and slitting mechanism rolls the dried paste and slits the foamed nickel plate (1) along the smooth nickel strip region (1b), thereby forming multiple electrode plates with ears.
7. The electrode plate manufacturing device according to claim 6, characterized in that The rolling and slitting mechanism can slit the foamed nickel plate (1) along the midline of the smooth nickel strip region (1b). The width of the foamed nickel regions (1a) located on both sides of the foamed nickel plate (1) in the width direction is half of the width of the other foamed nickel regions (1a) among the multiple foamed nickel regions (1a). The rolling and slitting mechanism can further slit along the midline of the other foamed nickel regions (1a), thereby forming multiple electrode plates with ears.
8. The plate manufacturing apparatus according to claim 6 or 7, characterized in that, The rolling and slitting mechanism can further slit the foamed nickel plate (1) along the width direction of the foamed nickel plate (1).
9. An electrode plate with ears, characterized in that, It is an electrode plate manufactured by the electrode plate manufacturing device according to any one of claims 6 - 8, including a main body part and ears. The main body part is formed by the foamed nickel region (1a), and the ears are formed by the smooth nickel strip region (1b).
10. The electrode plate with ears according to claim 9, characterized in that, The electrode plate with ears is the positive electrode plate used in a nickel - hydrogen battery.