Nickel-metal hydride cylindrical power battery

Abstract

The utility model discloses a nickel-metal hydride cylindrical power battery, and relates to the technical field of power batteries. The utility model comprises an outer fixed shell, an outer insulating shell, a conductive disc and a top polar plate, the outer insulating shell is fixed on the outer surface of the outer fixed shell, a plurality of elastic rings are fixed on the peripheral side surface of the outer insulating shell, a conductive ring is fixed at the top end of the outer fixed shell, a sealing ring is fixed on the inner wall of the conductive ring, and the conductive disc is fixed on the inner wall of the sealing ring. Top polar plates are fixed to the top ends of the conductive discs. By arranging the outer fixed shell, the outer insulating shell, the conductive disc and the top polar plate, the problems that heating loss is easily caused by current passing between the polar plate and the polar lug in the nickel-hydrogen power battery, the battery is not good enough in high-temperature environment applicability, and the nickel-hydrogen power battery is easily limited in discharge current when being used in high-rate electric equipment are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to power batteries, and in particular relates to a nickel-hydrogen cylindrical power battery. Background Art

[0002] Nickel-hydrogen batteries react with nickel metal by the transfer of hydroxyl ions loaded with electrons to perform storage and discharge reactions. They have 30% more power reserves than nickel-cadmium batteries, are lighter than nickel-cadmium batteries, have longer service life, and are environmentally friendly. The cylindrical battery core design structure consists of positive and negative plates, diaphragms, and tabs. The tabs need to be welded to the plates for welding coordination. After being connected to the outside, the battery is charged and discharged when it is working. However, it still has the following disadvantages in actual use:

[0003] In nickel-hydrogen power batteries, the tabs are directly fixed on the positive and negative plates in the battery. During the operation of the battery, the connection between the tabs and the positive and negative plates is fixed by welding. The traditional tabs have a small contact area with the positive plate, and the negative plate is wrapped by a diaphragm and is not in direct contact with the bottom of the steel shell, resulting in limited discharge current, small welding points, large internal resistance when current passes through, and high heat generation;

[0004] Due to internal resistance and ambient temperature, nickel-hydrogen power batteries will produce a small amount of gas inside when the temperature rises. If it remains directly in the battery, it will cause bulging. In addition, the battery has a smooth surface and low heat dissipation efficiency, which is not conducive to timely discharge of heat. The battery is not suitable for use in high temperature environments.

[0005] The design structure of the cylindrical battery core is composed of positive and negative plates, diaphragms, tabs, and tapes; the tabs need to be welded to the positive plate. As the conductive connector of the battery, the tabs determine the upper limit of the battery's discharge current to a certain extent. The traditional tabs have a small contact area with the positive plate, and the negative plate is wrapped by the diaphragm and has no direct contact with the bottom of the steel shell, which limits its discharge current and the use of nickel-hydrogen power batteries in high-rate electrical equipment. Utility Model Content

[0006] The utility model aims to provide a nickel-hydrogen cylindrical power battery. By arranging an external fixing shell, an external insulating shell, a conductive disk and a top electrode plate, the utility model solves the problems that the current passing between the electrode plate and the electrode ear in the nickel-hydrogen power battery is easy to cause heat loss, the battery is not suitable for high temperature environment, and the nickel-hydrogen power battery is easy to be limited in discharge current when used in high-rate electrical equipment.

[0007] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0008] The utility model discloses a nickel-hydrogen cylindrical power battery, comprising an outer fixed shell, an outer insulating shell, a conductive disk and a top electrode plate. The outer surface of the outer fixed shell is fixed with the outer insulating shell, a plurality of elastic rings are fixed on the peripheral side surface of the outer insulating shell, a conductive ring is fixed on the top of the outer fixed shell, a sealing ring is fixed on the inner wall of the conductive ring, a conductive disk is fixed on the inner wall of the sealing ring, and a top electrode plate is fixed on the top of the conductive disk. When working, the positive electrode plate, the negative electrode plate and the insulating film are accommodated in the outer fixed shell and serve as the negative electrode of the battery. The outer fixed shell is protected by the outer insulating shell, and is fixed to the positive electrode plate through the conductive disk and the top electrode plate, so as to be connected to the positive electrode of the battery.

[0009] Furthermore, a negative electrode plate is fixed to the bottom of the outer fixed shell, and the negative electrode plate is in a spiral shape. A positive electrode plate is fixed to the bottom end of the conductive disk, and the positive electrode plate is also in a spiral shape and is arranged in the outer fixed shell. An insulating film is arranged between the positive electrode plate and the negative electrode plate, and the insulating film is in a spiral shape. The insulating film is in contact with the positive electrode plate and the negative electrode plate respectively. The outer fixed shell cooperates with the negative electrode plate and the positive electrode plate to form a battery circuit under the separation of the insulating film.

[0010] Furthermore, the conductive ring is fixed on the inner wall of the outer insulating shell, a negative pole tab is fixed on the top of the conductive ring, and the conductive ring is negatively connected to electricity through the negative pole tab.

[0011] Furthermore, the spacings between adjacent elastic rings are equal, the interiors of the elastic rings are hollow, and the elastic rings increase the heat dissipation capacity of the outer fixing shell.

[0012] Furthermore, a ventilation hole is provided through the inner center of the conductive disk, and the ventilation hole is communicated with the outer fixed shell. The conductive disk receives air generated when the battery is overheated through the ventilation hole.

[0013] Furthermore, an elastic membrane is fixed through the inner center of the top electrode plate, the elastic membrane corresponds to the position of the air vent, and a positive electrode ear is fixed to one side of the top electrode plate, and the top electrode plate connects the positive electrode ear thereto.

[0014] The utility model has the following beneficial effects:

[0015] The utility model solves the problem that the current passing between the plate and the tab in the nickel-hydrogen power battery easily causes heat loss and the battery charge and discharge rate is not good enough by arranging an external fixing shell, a conductive disk and a top plate. When the positive tab and the negative tab are connected to the external circuit, a charge and discharge loop is formed. When working, the positive plate is fixed to the conductive disk, and the negative plate is fixed to the external fixing shell, so that the electrodes are arranged with full tabs, the contact area between the battery conductive structure and the positive plate and the negative plate is larger, the internal resistance is smaller, and the heat loss is smaller.

[0016] The utility model solves the problem that the battery is not well adapted to high-temperature environments by arranging an outer fixed shell, an outer insulating shell, a conductive disk and a top electrode plate. When the temperature in the outer fixed shell is too high and gas is generated, the gas enters the air holes on the conductive disk. When the air pressure further increases, the elastic membrane of the middle top electrode plate is deformed when the air pressure in the air holes increases, so that more gas can be accommodated in the air holes to prevent the air pressure in the air holes from being higher. During operation, the outer insulating shell is protected by an elastic ring, and the heat dissipation area of ​​the outer fixed shell is increased, thereby increasing the heat dissipation capacity of the battery and making the battery better adapted to high-temperature environments.

[0017] The utility model solves the problem that the nickel-hydrogen power battery is easily limited in discharge current when used in high-rate electrical equipment by arranging an external fixed shell, a conductive disk and a top electrode plate. The utility model adopts a full-pole ear connection design for the positive electrode plate and the negative electrode plate. The disc-shaped conductive disk and the top electrode plate are used as the positive electrode plate connection electrode. The full-pole ear negative electrode plate has a 2mm blank space at the bottom for folding. After winding, it protrudes 0.5mm beyond the diaphragm and can be directly contacted and fixed with the bottom of the external fixed shell, thereby increasing the conductive cross-sectional area of ​​the battery for charging and discharging, improving its high-rate charging and discharging performance, and having the advantage of being able to perform rate charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a three-dimensional diagram of the assembly structure of a nickel-hydrogen cylindrical power battery;

[0020] Figure 2 It is a three-dimensional diagram of the cross-sectional structure of the external fixed shell;

[0021] Figure 3 for Figure 2 A magnified view of the structure at A;

[0022] Figure 4 It is a three-dimensional diagram of the cross-sectional structure of the outer insulating shell;

[0023] Figure 5 for Figure 4 A magnified view of the structure at B in FIG.

[0024] Figure 6 It is a partially cutaway structural stereogram of the conductive disk;

[0025] Figure 7 This is a three-dimensional diagram of the top plate structure.

[0026] Reference numerals:

[0027] 1. External fixed shell; 101. Negative plate; 102. Insulating film; 103. Positive plate; 104. Conductive ring; 105. Negative pole ear; 2. External insulating shell; 201. Elastic ring; 3. Conductive disk; 301. Air vent; 302. Sealing ring; 4. Top plate; 401. Elastic film; 402. Positive pole ear. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0029] See also Figure 1-7 The utility model is a nickel-hydrogen cylindrical power battery, comprising an outer fixed shell 1, an outer insulating shell 2, a conductive disk 3 and a top plate 4. The outer insulating shell 2 is fixed on the outer surface of the outer fixed shell 1. The outer fixed shell 1 seals the positive plate 103, the negative plate 101 and the insulating film 102 therein, and contains the electrolyte therein. The outer fixed shell 1 is sealed therein by the outer insulating shell 2 and is insulated. A plurality of elastic rings 201 are fixed on the peripheral side of the outer insulating shell 2. The outer insulating shell 2 is protected by the elastic rings 201. A conductive ring 104 is fixed to the top of the shell 1, and the outer fixed shell 1 is connected to the negative electrode ear 105 through the conductive ring 104, and a sealing ring 302 is fixed thereon, a sealing ring 302 is fixed on the inner wall of the conductive ring 104, the sealing ring 302 seals the gap between the conductive ring 104 and the conductive disk 3, and insulates the conductive ring 104 and the conductive disk 3, a conductive disk 3 is fixed on the inner wall of the sealing ring 302, the conductive disk 3 connects the positive electrode plate 103 to its bottom, a top electrode plate 4 is fixed on the top of the conductive disk 3, and the top electrode plate 4 is connected to the positive electrode.

[0030] Specifically, a negative electrode plate 101 is fixed at the bottom of the outer fixed shell 1, and the negative electrode plate 101 is in a spiral shape. A positive electrode plate 103 is fixed at the bottom of the conductive disk 3, and the positive electrode plate 103 is also in a spiral shape and is arranged in the outer fixed shell 1. An insulating film 102 is arranged between the positive electrode plate 103 and the negative electrode plate 101, and the insulating film 102 is in a spiral shape. The insulating film 102 contacts the positive electrode plate 103 and the negative electrode plate 101 respectively. A 2 mm gap is left between the bottom of the negative electrode plate 101 and the bottom of the insulating film 102, and the gap is used for folding. After winding, the length exceeding the insulating film 102 is 0.5 mm, which can be directly in contact with the bottom of the outer fixed shell 1, thereby increasing the conductive cross-sectional area of ​​the battery charging and discharging. As a current collector, it is directly fixed to the bottom of the outer fixed shell 1 to form full-ear conductivity. The outer fixed shell 1 cooperates with the negative electrode plate 101 and the positive electrode plate 103 to perform power connection operations, and the positive electrode plate 103 and the negative electrode plate 101 are insulated by the insulating film 102.

[0031] Furthermore, the conductive ring 104 is fixed on the inner wall of the outer insulating shell 2 , and a negative pole ear 105 is fixed on the top of the conductive ring 104 . The conductive ring 104 is fixed on the inner wall of the outer insulating shell 2 , and is protected by the outer insulating shell 2 , and the electrons generated on the negative electrode plate 101 are conducted out through the negative pole ear 105 .

[0032] The operation process of this embodiment is as follows: during operation, when the battery is running, the positive plate 103 and the negative plate 101 cooperate to generate electrical energy through a chemical reaction. After generating electrical energy, the electrons generated by the negative electrode are transferred to the outer fixed shell 1, and then transferred to the conductive ring 104 through the outer fixed shell 1, and then transferred to the negative electrode ear 105 through the conductive ring 104, and then led out from the negative electrode ear 105. The positive plate 103 is fixed on the conductive disk 3, and is connected to the top electrode plate 4 through the conductive disk 3. The electrons are transferred to the top electrode plate 4 through the positive electrode ear 402, and then transferred to the negative electrode ear 105 through the conductive disk 3. The positive electrode 103 is passed to the positive electrode plate 103 to form a discharge circuit. When the positive electrode tab 402 and the negative electrode tab 105 are connected to the external circuit, a charge and discharge circuit is formed. When working, the positive electrode plate 103 is fixed to the conductive disk 3, and the negative electrode plate 101 is fixed to the external fixed shell 1, so that the electrodes are arranged in a full-tab arrangement. The contact area between the battery conductive structure and the positive electrode plate 103 and the negative electrode plate 101 is larger, and the internal resistance is smaller. By adopting the full-tab arrangement, the conductive cross-sectional area of ​​the positive electrode plate 103 and the negative electrode plate 101 for charging and discharging is increased, the high-rate charge and discharge performance of the battery is improved, and the charging efficiency is accelerated. Specific embodiment 2

[0033] See also Figure 1 , 4 , 5, 6, 7, based on the specific embodiment 1, the spacing between adjacent elastic rings 201 is equal, and the interior of the elastic ring 201 is hollow. When working, the elastic ring 201 is used to protect the outer insulating shell 2, and the heat dissipation area of ​​the outer fixed shell 1 is increased, thereby increasing the heat dissipation capacity of the battery.

[0034] Specifically, a ventilation hole 301 is formed through the center of the conductive plate 3 , and the ventilation hole 301 is connected to the outer fixing shell 1 . The conductive plate 3 partially accommodates the gas generated by the increased temperature in the outer fixing shell 1 through the ventilation hole.

[0035] Furthermore, an elastic membrane 401 is fixed through the inner center of the top electrode plate 4, and the elastic membrane 401 corresponds to the position of the air hole 301. A positive electrode ear 402 is fixed on one side of the top electrode plate 4. When the air pressure in the air hole 301 increases, the elastic membrane 401 of the top electrode plate 4 is deformed, so that more gas can be accommodated in the air hole 301 to prevent the air pressure in the air hole 301 from being higher, and the positive electrode of the battery is connected to the power through the positive electrode ear 402.

[0036] The operation process of this embodiment is as follows: when the temperature in the outer fixed shell 1 is too high and gas is generated, the gas enters the air hole 301 on the conductive disk 3. When the gas pressure further increases, the elastic membrane 401 of the middle top plate 4 is deformed when the gas pressure in the air hole 301 increases, so that more gas can be accommodated in the air hole 301 to prevent the gas pressure in the air hole 301 from being higher. During operation, the outer insulating shell 2 is protected by the elastic ring 201, and the heat dissipation area of ​​the outer fixed shell 1 is increased, thereby increasing the heat dissipation capacity of the battery.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nickel-hydrogen cylindrical power battery, comprising an outer fixing shell (1), an outer insulating shell (2), a conductive disk (3) and a top electrode plate (4), characterized in that: An outer insulating shell (2) is fixed on the outer surface of the outer fixed shell (1), a plurality of elastic rings (201) are fixed on the peripheral side surface of the outer insulating shell (2), a conductive ring (104) is fixed on the top of the outer fixed shell (1), a sealing ring (302) is fixed on the inner wall of the conductive ring (104), a conductive disk (3) is fixed on the inner wall of the sealing ring (302), and a top electrode plate (4) is fixed on the top of the conductive disk (3).

2. A nickel-hydrogen cylindrical power battery according to claim 1, characterized in that: A negative electrode plate (101) is fixed to the bottom of the outer fixed shell (1), and the negative electrode plate (101) is in a spiral shape. A positive electrode plate (103) is fixed to the bottom end of the conductive disk (3), and the positive electrode plate (103) is also in a spiral shape and is arranged in the outer fixed shell (1). An insulating film (102) is arranged between the positive electrode plate (103) and the negative electrode plate (101), and the insulating film (102) is in a spiral shape. The insulating film (102) is in contact with the positive electrode plate (103) and the negative electrode plate (101), respectively.

3. A nickel-hydrogen cylindrical power battery according to claim 1, characterized in that: The conductive ring (104) is fixed on the inner wall of the outer insulating shell (2), and a negative electrode tab (105) is fixed on the top of the conductive ring (104).

4. A nickel-hydrogen cylindrical power battery according to claim 1, characterized in that: The spacing between adjacent elastic rings (201) is equal, and the interior of the elastic ring (201) is hollow.

5. The nickel-hydrogen cylindrical power battery according to claim 1, characterized in that: A ventilation hole (301) is provided through the inner center of the conductive disk (3), and the ventilation hole (301) is connected to the outer fixed shell (1).

6. A nickel-hydrogen cylindrical power battery according to claim 5, characterized in that: An elastic membrane (401) is fixedly passed through the inner center of the top electrode plate (4), the elastic membrane (401) corresponds to the position of the air vent (301), and a positive electrode tab (402) is fixedly disposed on one side of the top electrode plate (4).

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