Three-tab lithium ion battery and sodium ion battery

Abstract

The utility model discloses a three-tab lithium ion battery and a three-tab sodium ion battery, which relate to the technical field of batteries and comprise a battery body, the upper end of the battery body is respectively provided with a first positive tab, a second positive tab and a negative tab, and the front surface of the battery is provided with a positive tab and a negative tab from left to right. The first positive tab, the second positive tab and the negative tab or the first positive tab, the negative tab and the second positive tab are arranged in sequence; the protective cover is arranged at the upper end of the battery body, the protective cover is movably clamped at the upper end of the battery body, a deviation rectifying plate is arranged at the upper end of the interior of the protective cover, the protective cover can protect positive and negative tabs above the battery body, and meanwhile, the deviation rectifying plate is arranged at the upper part of the interior of the protective cover; and the deviation rectifying plate can deflect the positive and negative tabs towards one side when the protective cover is closed, so that the positive and negative tabs are bent to be attached to the upper part of the battery body, and the positive and negative tabs are prevented from being easily damaged and scraped when erected.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a three-tab lithium-ion battery and a sodium-ion battery. Background Technique

[0002] With the development of social economy and the progress of the times, digital electronic products have become an integral part of people's lives and work, whether for entertainment, life, or work. Digital electronic products often require batteries for power supply, which has led to a shortage in the production of batteries on the market.

[0003] Generally, a positive tab and a negative tab are provided at the upper end of a battery. However, during the transportation of the battery, since the positive tab and the negative tab are exposed, it is very easy for the two tabs to come into contact with external objects, which may cause a short circuit or damage to the surface of the tabs, resulting in the battery being unable to be used subsequently. Therefore, we propose a three-tab lithium-ion battery and a sodium-ion battery to solve the problems mentioned above. Content of the Utility Model

[0004] The purpose of the utility model is to provide a three-tab lithium-ion battery and a sodium-ion battery to solve the problem that during the transportation of the battery, since the positive tab and the negative tab are exposed, it is very easy for the two tabs to come into contact with external objects, which may cause a short circuit or damage to the surface of the tabs, resulting in the battery being unable to be used subsequently as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A three-tab lithium-ion battery and a sodium-ion battery, including a battery body, and a first positive tab, a second positive tab, and a negative tab are respectively provided at the upper end of the battery body;

[0006] It further includes:

[0007] From left to right on the front of the battery, it is successively composed of a first positive tab, a second positive tab, and a negative tab or a first positive tab, a negative tab, and a second positive tab;

[0008] A protective cover, which is provided at the upper end of the battery body, and the protective cover is movably clamped at the upper end of the battery body. A deviation correction plate is provided at the upper end inside the protective cover. The deviation correction plate swings inside the upper end of the protective cover through a rotating seat. A first spring is provided at the rear end of the deviation correction plate. The other end of the first spring is fixed to the upper end inside the protective cover through a buckle, and the deviation correction plate and the first spring are fixedly connected through a buckle. A cushion plate is provided inside the protective cover, and the cushion plate is located on one side inside the protective cover.

[0009] Preferably, a chute is provided on one side of the inner wall of the protective cover, a sliding plate is provided at the rear end of the backing plate, the sliding plate is slidably engaged inside the chute through a limiting structure, and the backing plate moves up and down on one side of the inner wall of the protective cover through the sliding plate. A second spring is provided inside the chute, the second spring is fixed to the upper end inside the chute through a buckle, and the bottom of the second spring is fixed to the upper end of the sliding plate through a buckle.

[0010] Preferably, a limiting block is provided at the upper end inside the protective cover.

[0011] Preferably, a locking convex block is provided on one side inside the protective cover.

[0012] Preferably, a sponge pad is provided at the upper end inside the protective cover, and the sponge pad is located above the backing plate.

[0013] Preferably, the battery outer packaging film is an aluminum-plastic packaging film.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. A protective cover that is movably engaged is provided at the upper end of the battery body. The protective cover can protect the positive and negative electrode tabs above the battery body. At the same time, a deviation correction plate is provided above the inside of the protective cover. The deviation correction plate can deflect the positive and negative electrode tabs to one side when closing the protective cover, so that the positive and negative electrode tabs are bent to fit above the battery body, preventing the positive and negative electrode tabs from standing up and being easily damaged and scratched. At the same time, a backing plate is provided inside the protective cover. The backing plate is located between the positive and negative electrode tabs and the battery body to support the bottom when the positive and negative electrode tabs are bent, preventing the positive and negative electrode tabs from being bent too much and causing damage.

[0016] 2. By adding a positive electrode tab to the traditional two-electrode tab battery and changing it into a three-electrode tab battery, and the three electrode tabs are respectively led out from the middle of the electrode plate. When the battery is working, the shuttle distance between electrons is reduced, the internal resistance is lowered, the rate performance of the battery is enhanced, which is beneficial to the high-rate discharge of the battery. And the internal winding core of the battery is made by winding the positive electrode plate, negative electrode plate and separator. When the battery is tested or applied, the two positive electrode tabs must be connected to the positive terminal at the same time, and the negative electrode tab is connected to the negative terminal. This wound three-electrode tab lithium-ion battery and sodium-ion battery have a 5C rate discharge capacity ≥ 80% of the initial capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the closed structure of the protective cover of the present utility model;

[0019] Figure 3 is a schematic diagram of the opened structure of the protective cover of the present utility model;

[0020] Figure 4 This is the front view of Embodiment 1 of the present utility model;

[0021] Figure 5 This is the front view of Embodiment 2 of the present utility model;

[0022] Figure 6 This is the structural diagram of the positive electrode sheet of the present utility model;

[0023] Figure 7 This is the structural diagram of the negative electrode sheet of the present utility model;

[0024] In the figure: 1. Battery body; 2. First positive electrode tab; 3. Negative electrode tab; 4. Second positive electrode tab; 5. Protective cover; 6. Limiting block; 7. Locking convex block; 8. Deviation correction plate; 9. First spring; 10. Rotating seat; 11. Sponge pad; 12. Chute; 13. Second spring; 14. Slide plate; 15. Cushion plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Embodiment 1: A three-tab lithium-ion battery and sodium-ion battery, including a battery body 1, and a first positive electrode tab 2, a second positive electrode tab 4, and a negative electrode tab 3 are respectively arranged at the upper end of the battery body 1;

[0027] It further includes:

[0028] From left to right on the front of the battery, there are successively a first positive electrode tab 2, a second positive electrode tab 4, and a negative electrode tab 3;

[0029] A protective cover 5, which is arranged at the upper end of the battery body 1, and the protective cover 5 is movably clamped at the upper end of the battery body 1. An upper end inside the protective cover 5 is provided with a deviation correction plate 8. The deviation correction plate 8 swings inside the upper end of the protective cover 5 through a rotating seat 10. A first spring 9 is arranged at the rear end of the deviation correction plate 8, and the other end of the first spring 9 is fixed to the upper end inside the protective cover 5 through a buckle, and the deviation correction plate 8 and the first spring 9 are fixedly connected through a buckle. A cushion plate 15 is arranged inside the protective cover 5, and the cushion plate 15 is located on one side inside the protective cover 5.

[0030] The protective cover 5 can protect the positive and negative electrode tabs above the battery body 1. At the same time, a deviation correction plate 8 is arranged above the inside of the protective cover 5. The deviation correction plate 8 can deflect the positive and negative electrode tabs to one side when closing the protective cover 5, so that the positive and negative electrode tabs are bent to fit above the battery body 1, preventing the positive and negative electrode tabs from standing up easily and causing damage and scratching.

[0031] Please refer toFigure 2-3 , on one side of the inner wall of the protective cover 5, a chute 12 is provided. At the rear end of the backing plate 15, a sliding plate 14 is provided. The sliding plate 14 is slidably engaged inside the chute 12 through a limiting structure, and the backing plate 15 moves up and down on one side of the inner wall of the protective cover 5 through the sliding plate 14. Inside the chute 12, a second spring 13 is provided. The second spring 13 is fixed inside the upper end of the chute 12 through a buckle, and the bottom of the second spring 13 is fixed to the upper end of the sliding plate 14 through a buckle, so that when the protective cover 5 descends, the backing plate 15 still remains and fits on the upper end of the battery body 1.

[0032] Please refer to Figure 2-3 , at the upper end inside the protective cover 5, a limiting block 6 is provided, leaving a distance between the inside of the protective cover 5 and the battery body 1.

[0033] Please refer to Figure 2-3 , on one side inside the protective cover 5, a locking projection block 7 is provided, which can play a role in fixing the protective cover 5.

[0034] Please refer to Figure 2-3 , at the upper end inside the protective cover 5, a sponge pad 11 is provided, and the sponge pad 11 is located above the backing plate 15 to protect the upper part of the positive and negative electrode tabs.

[0035] Please refer to Figure 1 , the battery outer packaging film is an aluminum-plastic packaging film, and this material has good isolation performance.

[0036] Please refer to Figure 1-4 , the main material of the positive electrode sheet is one or more of lithium cobaltate, lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, lithium manganese iron phosphate, layered oxide-based positive electrode materials, polyanion-based positive electrode materials, and Prussian blue-based positive electrode materials. The main material of the negative electrode sheet is one or more of graphite, hard carbon, soft carbon, and amorphous carbon. The internal battery winding core is made by winding the positive electrode sheet, negative electrode sheet, and separator, including one or more of manual winding, semi-automatic winding, and full-automatic winding methods. The 5C rate discharge capacity of this wound three-tab lithium-ion battery and sodium-ion battery is ≥80% of the initial capacity. The welding method of the battery positive electrode tab is ultrasonic welding or spot welding, and the welding method of the negative electrode tab is ultrasonic welding or spot welding. The internal electrode sheet structure of the battery is applicable to both lithium-ion batteries and sodium-ion batteries.

[0037] Example 2: A three-tab lithium-ion battery and sodium-ion battery, including a battery body 1. At the upper end of the battery body 1, a first positive electrode tab 2, a second positive electrode tab 4, and a negative electrode tab 3 are respectively provided;

[0038] It also includes:

[0039] From left to right on the front of the battery, it is successively composed of a first positive electrode tab 2, a negative electrode tab 3, and a second positive electrode tab 4;

[0040] A protective cover 5 is provided at the upper end of the battery body 1, and the protective cover 5 is movably snap-fitted to the upper end of the battery body 1. A deviation correction plate 8 is provided at the upper end inside the protective cover 5. The deviation correction plate 8 swings inside the upper end of the protective cover 5 through a rotating seat 10. A first spring 9 is provided at the rear end of the deviation correction plate 8. The other end of the first spring 9 is fixed to the upper end inside the protective cover 5 by a buckle, and the deviation correction plate 8 and the first spring 9 are fixedly connected by a buckle. A backing plate 15 is provided inside the protective cover 5, and the backing plate 15 is located on one side inside the protective cover 5.

[0041] Please refer to Figure 2-3 , a chute 12 is provided on one side of the inner wall of the protective cover 5. A sliding plate 14 is provided at the rear end of the backing plate 15. The sliding plate 14 is slidably snap-fitted inside the chute 12 through a limiting structure, and the backing plate 15 moves up and down on one side of the inner wall of the protective cover 5 through the sliding plate 14. A second spring 13 is provided inside the chute 12. The second spring 13 is fixed to the upper end inside the chute 12 by a buckle, and the bottom of the second spring 13 is fixed to the upper end of the sliding plate 14 by a buckle.

[0042] Please refer to Figure 2-3 , a limiting block 6 is provided at the upper end inside the protective cover 5.

[0043] Please refer to Figure 2-3 , a locking projection block 7 is provided on one side inside the protective cover 5.

[0044] Please refer to Figure 2-3 , a sponge pad 11 is provided at the upper end inside the protective cover 5, and the sponge pad 11 is located above the backing plate 15.

[0045] Please refer to Figure 1 , the battery outer packaging film is an aluminum-plastic packaging film.

[0046] Please refer to Figure 1-4 , the main material of the positive electrode plate is one or more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium manganese oxide, lithium iron phosphate, lithium manganese iron phosphate, layered oxide-based positive electrode materials, polyanion-based positive electrode materials, and Prussian blue-based positive electrode materials. The main material of the negative electrode plate is one or more of graphite, hard carbon, soft carbon, and amorphous carbon. The internal battery core is made by winding the positive electrode plate, negative electrode plate, and separator, including one or more of manual winding, semi-automatic winding, and fully automatic winding methods. The 5C rate discharge capacity of this wound three-tab lithium-ion battery and sodium-ion battery is ≥80% of the initial capacity. The welding method of the battery positive electrode tab is ultrasonic welding or spot welding, and the welding method of the negative electrode tab is ultrasonic welding or spot welding. The internal electrode plate structure of the battery is applicable to both lithium-ion batteries and sodium-ion batteries.

[0047] Working principle: Cover the protective cover 5 on the upper end of the battery body 1. At this time, the positive and negative electrode tabs are in a standing state. First, the backing plate 15 fits on the upper end of the battery body 1. Then, while the protective cover 5 slowly descends, the backing plate 15 still fits on the upper end of the battery body 1 under the action of the chute 12 and the sliding plate 14. The slow descent of the protective cover 5 causes the alignment plate 8 to contact the upper ends of the positive and negative electrode tabs. Since the alignment plate 8 is inclined, when the alignment plate 8 descends, it inclines the positive and negative electrode tabs towards the backing plate 15. At the same time, the alignment plate 8 swings upward under the action of pressure until the protective cover 5 is completely closed on the battery body 1. At this time, the alignment plate 8 is in a parallel state. At the same time, the positive and negative electrode tabs are bent and fit on the upper end of the backing plate 15, and the sponge pad 11 also fits on the upper ends of the positive and negative electrode tabs to protect the positive and negative electrode tabs.

[0048] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A three-electrode lithium-ion battery or sodium-ion battery, comprising a battery body (1), wherein the upper end of the battery body (1) is respectively provided with a first positive electrode ear (2), a second positive electrode ear (4) and a negative electrode ear (3); Features: Also includes: The front side of the battery is composed of, from left to right, a first positive electrode ear (2), a second positive electrode ear (4) and a negative electrode ear (3) or a first positive electrode ear (2), a negative electrode ear (3) and a second positive electrode ear (4) arranged in sequence; A protective cover (5) is arranged at the upper end of a battery body (1), and the protective cover (5) is movably engaged with the upper end of the battery body (1); a deflection correction plate (8) is arranged at the inner upper end of the protective cover (5); the deflection correction plate (8) swings at the inner upper end of the protective cover (5) through a rotating seat (10); a first spring (9) is arranged at the rear end of the deflection correction plate (8); the other end of the first spring (9) is fixed to the inner upper end of the protective cover (5) by a buckle, and the deflection correction plate (8) and the first spring (9) are fixedly connected by the buckle; a pad (15) is arranged inside the protective cover (5), and the pad (15) is located on one side of the inner part of the protective cover (5).

2. A three-electrode lithium-ion battery or sodium-ion battery according to claim 1, characterized in that: A slide groove (12) is provided on one side of the inner wall of the protective cover (5), and a slide plate (14) is provided at the rear end of the pad (15). The slide plate (14) is slidably engaged in the interior of the slide groove (12) through a limiting structure, and the pad (15) moves up and down on one side of the inner wall of the protective cover (5) through the slide plate (14). A second spring (13) is provided inside the slide groove (12), and the second spring (13) is fixed to the upper end of the interior of the slide groove (12) through a buckle, and the bottom of the second spring (13) is fixed to the upper end of the slide plate (14) through a buckle.

3. A three-electrode lithium-ion battery or sodium-ion battery according to claim 1, characterized in that: A limiting block (6) is provided at the inner upper end of the protective cover (5).

4. A three-electrode lithium-ion battery or sodium-ion battery according to claim 1, characterized in that: A locking protrusion block (7) is provided on one side of the interior of the protective cover (5).

5. A three-electrode lithium-ion battery or sodium-ion battery according to claim 1, characterized in that: A sponge pad (11) is provided at the inner upper end of the protective cover (5), and the sponge pad (11) is located at the upper end of the pad (15).

6. A three-electrode lithium-ion battery or sodium-ion battery according to claim 1, characterized in that: The battery outer packaging film is an aluminum-plastic packaging film.

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