Wide-temperature large-diameter nickel-metal hydride button cell

Abstract

The utility model discloses a wide-temperature large-diameter nickel-metal hydride button cell which comprises a shell, a folding pole group and a limiting base, the folding pole group is arranged in the shell and comprises a positive pole plate, a negative pole plate and a diaphragm, the positive pole plate and the negative pole plate are respectively arranged to be of a folding structure, and the positive pole plate and the negative pole plate are overlapped together in a crossed mode. The diaphragm is arranged between the contact surfaces of the positive pole plate and the negative pole plate, a groove is formed in the surface of the limiting base, the folding pole group is located in the groove of the limiting base, elastic supporting legs are arranged on the lower surface of the limiting base, the limiting base has elasticity through the elastic supporting legs, and the elastic supporting legs abut against the bottom of the shell; a guide ring is arranged on the lower surface of the limiting base; the structural design is novel, the novel folding pole group is adopted, the capacity of the battery is increased, compared with a common button battery, the capacity is higher, the service life is longer, the structural design strength of the shell is high, the folding pole group is limited, the position of the folding pole group is fixed, and displacement is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of button batteries, in particular to a nickel-hydrogen button battery with a wide temperature range and a large diameter. Background Art

[0002] Button batteries are widely used in life due to their small size, easy replacement, long life, safety, reliability, and affordability. These applications include electronic products, vehicle electronic systems, industrial automation, medical equipment, aerospace, military and defense, communications and network equipment, cold chain, industry, storage equipment, etc. These fields require batteries to adapt to extremely high or low ambient temperatures and still perform at high performance in high and low temperature environments.

[0003] The existing button battery generally consists of a negative electrode, a positive electrode, a separator, and a positive and negative electrode shell. The negative electrode, the positive electrode and the separator form a pole group. After the positive and negative electrode shells are pressed together, the pole group is fixed in the shell. Due to the lack of a limiting mechanism, the pole group is prone to displacement, which affects the normal use of the battery. In addition, the negative electrode and the positive electrode are both conventional planar structures, with small capacity, low space utilization and short service life. For example, Chinese patent application No. 202322380612.5 discloses a button battery, including a positive electrode material, a negative electrode material, a separator, a sealing ring, a positive electrode shell, a negative electrode shell, a positive ... The button battery has the above-mentioned problems; Chinese patent application No. 201810622971.8 discloses a button battery, including a base arranged in the positive electrode shell; the base includes an outer ring wall, an inner ring wall and a top wall, and the outer ring wall, the inner ring wall and the top wall form an annular cavity. Although the base is provided in the shell, it lacks an elastic structure, and it is easy for the pole group to shake, and the pole group has a conventional structure, small capacity and short life; it cannot meet the needs of actual use, so there is an urgent need for improved technology on the market to solve the above-mentioned problems. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a wide-temperature and large-diameter nickel-metal hydride button battery. The structural design is novel and the space utilization rate is high. A new foldable electrode group is adopted to increase the capacity of the battery. Compared with ordinary button batteries, the capacity is higher and the life is longer. In addition, the shell structure design has high strength, and the folded electrode group is restricted to fix its position to prevent displacement and contact with the side of the shell. It is also convenient for battery assembly and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wide-temperature, large-diameter nickel-metal hydride button battery, comprising a shell, a folded electrode group and a limiting base, the folded electrode group being arranged in the shell, the folded electrode group comprising a positive electrode plate, a negative electrode plate and a diaphragm, the positive electrode plate and the negative electrode plate being respectively arranged as a folding structure, the positive electrode plate and the negative electrode plate being cross-stacked together, and the diaphragm being arranged between the contact surfaces of the positive electrode plate and the negative electrode plate, a groove being arranged on the surface of the limiting base, the folded electrode group being located in the groove of the limiting base, an elastic support leg being arranged on the lower surface of the limiting base, the elastic support leg making the limiting base elastic, the elastic support leg being in conflict with the bottom of the shell, a guide ring being provided on the lower surface of the limiting base, the guide ring being slidably matched with the limiting ring on the bottom of the shell.

[0006] Furthermore, the shell includes a positive electrode shell and a negative electrode shell, the positive electrode shell and the negative electrode shell are respectively set to a convex structure, and a recessed portion is set in the center of the positive electrode shell. The positive electrode shell and the negative electrode shell are pressed together, and a sealing ring is set between the positive electrode shell and the negative electrode shell.

[0007] Furthermore, the positive electrode shell is provided with a downward lower bend, the negative electrode shell is provided with an upward upper bend, and the lower end of the positive electrode shell is provided with a closing portion, which corresponds to the bending position of the upper bend.

[0008] Furthermore, the limiting ring is provided on the negative electrode shell, the negative electrode shell is provided as a downwardly protruding structure, and the positive electrode shell is provided as an upwardly protruding structure.

[0009] Furthermore, a conductive gasket is provided between the limiting base and the folded electrode group, and the conductive gasket is made of steel strip.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] This structural design is novel and has high space utilization. It adopts a new folding electrode group to increase the capacity of the battery. Compared with ordinary button batteries, it has higher capacity and longer life. In addition, the shell structure is designed to have high strength, which restricts the folding electrode group to fix its position to prevent displacement and contact with the side of the shell. It is also convenient for battery assembly. The limiting base is elastic to ensure close contact between the positive plate, negative plate and diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0014] Figure 3 This is a schematic diagram of the structure of the electrode group removed in the utility model.

[0015] In the figure: 1 diaphragm, 2 positive electrode plate, 3 negative electrode plate, 4 guide ring, 5 limiting base, 6 elastic support leg, 7 conductive gasket, 8 limiting ring, 9 positive electrode shell, 10 sealing ring, 11 upper bend, 12 negative electrode shell, 13 recessed portion, 14 lower bend, 15 closing portion. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0017] See also Figure 1-3The utility model provides a technical solution: a wide temperature and large diameter nickel-metal hydride button battery, including a shell, a folding electrode group and a limiting base 5, the folding electrode group is arranged in the shell, the folding electrode group includes a positive electrode plate 2, a negative electrode plate 3 and a diaphragm 1, the positive electrode plate 2 and the negative electrode plate 3 are respectively arranged as a folding structure, the positive electrode plate 2 and the negative electrode plate 3 are cross-stacked together, and the diaphragm 1 is arranged between the contact surfaces of the positive electrode plate 2 and the negative electrode plate 3, the folding electrode group is formed by folding the positive electrode plate 2 and the negative electrode plate 3, increasing the capacity of the battery, and the space The battery has high utilization rate, low internal resistance, higher capacity and longer life than ordinary button batteries. The positive plate 2 and negative plate 3 adopt slurry-drawn electrodes, which are punched into two circles connected by a substrate in the middle by a mold, and then folded with the diaphragm 1 to form an electrode group. In the positive electrode slurry, high-temperature spherical nickel is used and rare earth oxides are added, which can make the battery have a high charging efficiency under high-temperature and low-current charging. In addition, under normal temperature and low temperature environments, the discharge can reach more than 80% of the rated capacity. Its performance far exceeds that of ordinary batteries. The negative electrode material uses high-temperature Alloy powder and ultrafine alloy powder allow ions to diffuse normally at low temperatures, ensuring the performance of the battery under high and low temperature conditions. Borate is added to the electrolyte to ensure that the battery capacity is fully utilized under high and low temperature conditions. A groove is provided on the surface of the limiting base 5, and the folded electrode group is located in the groove of the limiting base 5. The groove of the limiting base 5 limits the folded electrode group to fix its position, prevents displacement, and prevents contact with the side of the shell, and facilitates battery assembly. The lower surface of the limiting base 5 is provided with elastic legs 6. The elastic legs 6 make the limiting base 5 elastic. After the shell is assembled, elastic force is applied to the folded electrode group to ensure that the positive electrode plate 2, the negative electrode plate 3 and the diaphragm 1 are in close contact. The elastic legs 6 contact the bottom of the shell. The lower surface of the limiting base 5 is provided with a guide ring 4. The guide ring 4 slides with the limiting ring 8 on the bottom of the shell. The position of the limiting base 5 is determined by the cooperation of the guide ring 4 and the limiting ring 8, preventing the internal components of the battery from being displaced due to collision, ensuring the reliability of the battery structure, and making the battery power supply performance more reliable and stable.

[0018] The shell includes a positive electrode shell 9 and a negative electrode shell 12. The positive electrode shell 9 and the negative electrode shell 12 are respectively arranged as convex structures, and a recessed portion 13 is provided in the center of the positive electrode shell 9. The positive electrode shell 9 and the negative electrode shell 12 are pressed together, and a sealing ring 10 is provided between the positive electrode shell 9 and the negative electrode shell 12. The positive electrode shell 9 and the negative electrode shell 12 are tightly matched and will not be loose. The structural design of the shell increases the structural strength of the battery itself, increases conductivity and reduces internal resistance.

[0019] The positive electrode housing 9 is provided with a downward lower bend 14, and the negative electrode housing 12 is provided with an upward upper bend 11. The lower bend 14 and the upper bend 11 are respectively provided at least two locations. The lower end of the positive electrode housing 9 is provided with a closing portion 15, which corresponds to the bending position of the upper bend 11. The structural strength and connection strength of the housing are increased by the lower bend 14 and the upper bend 11, and the contact area with the sealing ring 10 is also increased, thereby improving the sealing effect and preventing leakage of the electrolyte inside the housing.

[0020] The limiting ring 8 is provided on the negative electrode housing 12 . The negative electrode housing 12 is provided as a downwardly protruding structure, and the positive electrode housing 9 is provided as an upwardly protruding structure.

[0021] A conductive gasket 7 is provided between the limiting base 5 and the folding pole group. The conductive gasket 7 is made of steel strip. According to actual needs, the conductive gasket 7 can make up for the depth of the groove of the limiting base 5, thereby making the elastic leg 6 more elastic and improving the practicality of the device.

[0022] Preparation method of button battery:

[0023] 1. Both positive and negative electrodes adopt slurry-drawn electrodes. The positive electrode uses foamed nickel as the matrix, and the negative electrode uses burr steel strip as the matrix. The positive and negative electrode sheets are obtained by high-temperature drying, rolling and punching.

[0024] 2. Punching a diaphragm of a specific shape 1;

[0025] 3. Fold the positive electrode plate 2, the negative electrode plate 3 and the separator 1 to obtain an electrode group;

[0026] 4. Place the limiting base 5 into the assembled sealing ring 10 and the negative electrode shell 12, with the flat surface facing upwards, and then place the folded electrode group on top;

[0027] 5. Add electrolyte and operate the equipment to make the electrolyte penetrate into the folded electrode group;

[0028] 6. Buckle the positive electrode shell 9, seal and clean;

[0029] 7. You will get a 300H high and low temperature battery.

[0030] By testing the battery at 0℃, 25℃ and 70℃ respectively, the data show that at 70℃, the discharge capacity can reach 95% to 100% of the rated capacity; at 25℃, the discharge capacity can reach 100% or more of the rated capacity; at 0℃, the discharge capacity can reach more than 80% of the rated capacity. The above results show that the performance of this wide-temperature battery far exceeds that of ordinary batteries, and due to its special raw materials and convex steel shell, the battery's high and low temperature service life and safety are guaranteed.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may also have various changes and improvements, which fall within the scope of the present invention to be protected.

Claims

1. A wide-temperature, large-diameter nickel-hydrogen button battery, comprising a housing, a folding electrode group, and a limiting base (5), characterized in that: The folded electrode group is arranged in the shell, and the folded electrode group includes a positive electrode plate (2), a negative electrode plate (3) and a diaphragm (1). The positive electrode plate (2) and the negative electrode plate (3) are respectively arranged in a folded structure. The positive electrode plate (2) and the negative electrode plate (3) are cross-stacked together, and the diaphragm (1) is arranged between the contact surfaces of the positive electrode plate (2) and the negative electrode plate (3). A groove is arranged on the surface of the limiting base (5), and the folded electrode group is located in the groove of the limiting base (5). The lower surface of the limiting base (5) is provided with an elastic leg (6), and the elastic leg (6) makes the limiting base (5) elastic. The elastic leg (6) contacts the bottom of the shell. The lower surface of the limiting base (5) is provided with a guide ring (4), and the guide ring (4) is in sliding cooperation with the limiting ring (8) on the bottom of the shell.

2. The wide-temperature, large-diameter nickel-metal hydride button battery according to claim 1, characterized in that: The housing comprises a positive electrode housing (9) and a negative electrode housing (12), the positive electrode housing (9) and the negative electrode housing (12) are respectively configured as convex structures, and a recessed portion (13) is provided at the center of the positive electrode housing (9), the positive electrode housing (9) and the negative electrode housing (12) are pressed together, and a sealing ring (10) is provided between the positive electrode housing (9) and the negative electrode housing (12).

3. The wide-temperature, large-diameter nickel-metal hydride button battery according to claim 2, characterized in that: The positive electrode shell (9) is provided with a downward lower bend (14), the negative electrode shell (12) is provided with an upward upper bend (11), and the lower end of the positive electrode shell (9) is provided with a closing portion (15), and the closing portion (15) corresponds to the bending position of the upper bend (11).

4. The wide-temperature, large-diameter nickel-metal hydride button battery according to claim 2, characterized in that: The limiting ring (8) is arranged on the negative electrode shell (12), the negative electrode shell (12) is arranged as a downward convex structure, and the positive electrode shell (9) is arranged as an upward convex structure.

5. The wide-temperature, large-diameter nickel-metal hydride button battery according to claim 1, characterized in that: A conductive gasket (7) is provided between the limiting base (5) and the folded electrode group, and the conductive gasket (7) is made of a steel strip.

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