Battery and electric device

Abstract

The utility model provides a battery and electric device relates to battery technical field, the utility model provides a battery and electric device, it includes battery body, its battery body includes two shell, one of two shell inner wall is provided with the deep pit, the other shell inner wall is provided with the shallow pit, the side face of battery body is provided with the side sealing edge, the side sealing edge is provided with the deep pit, the shallow pit is provided with the shallow pit. A top sealing area is arranged on one side of the position of a tab at the head of the battery body, a positive tab is fixedly connected to the surface of the battery body, a negative tab is fixedly connected to one side of the positive tab on the surface of the battery body, positive plates and negative plates are arranged in the battery body in a staggered manner, and an included angle between a bending area of the positive tab (2) and a bending area of the negative tab (3) is 10-60 degrees. When the secondary battery disclosed by the utility model is packaged, the tabs are not easy to fall off from the current collector, the head space can be fully utilized, the energy density and the use effect of the battery are improved, the sealing performance of the battery is also improved, the problems of liquid leakage and the like are prevented, and the service life of the secondary battery is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electrical device. Background Art

[0002] A battery is a cup, tank, or other container, or part of a composite container, that contains an electrolyte solution and metal electrodes to generate an electric current. It is a device that converts chemical energy into electrical energy and has a positive electrode and a negative electrode. Existing batteries are configured as secondary batteries to improve efficiency and reduce costs. Secondary batteries are currently widely used in electronic products such as mobile devices, power tools, and electric vehicles.

[0003] Traditional secondary batteries include a shell, an electrode assembly and an electrolyte inside the shell. The electrode assembly generally consists of a positive electrode sheet, a separator and a negative electrode sheet. However, in actual use, it is found that during use, due to the simple center structure of the battery, the existing secondary batteries will have problems such as the center structure tabs easily falling off and the current collector at the tab position being damaged, as well as a problem of reduced energy density due to low head space utilization. Utility Model Content

[0004] The utility model provides a battery and an electrical device to solve the problems of easy detachment of the central structure tab in the battery, damage to the current collector at the tab position, and reduced energy density due to low head space utilization.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a battery and an electrical device, comprising a battery body, the battery body comprising two shells, the inner wall of one of the two shells is provided with a deep pit, and the inner wall of the other of the two shells is provided with a shallow pit, the side of the battery body is provided with a side seal, and the side of the head pole ear position of the battery body is provided with a top seal area, the surface of the battery body is fixedly connected to the positive pole ear, the surface of the battery body is fixedly connected to the negative pole ear on the side of the positive pole ear, positive and negative pole sheets are alternately arranged inside the battery body, and the positive and negative pole sheets are in a wound or stacked state, the positive pole sheet is fixedly connected to the positive pole ear, and the negative pole sheet is fixedly connected to the negative pole ear, the inner wall of the battery body is located on the surface of the positive pole sheet and the negative pole sheet, respectively fixedly connected with a diaphragm, wherein the angle between the bending area of ​​the positive pole ear and the negative pole ear is between 10°-60°.

[0006] The effect achieved by the above components is that the tabs are not likely to fall off the current collector during packaging of the secondary battery, which can fully utilize the head space, improve the battery energy density and use effect, and also improve the sealing of the battery, prevent leakage and other problems, and extend the service life of the secondary battery.

[0007] Preferably, a heat-sealed aluminum-plastic film packaging bag is provided on the surface of the battery body.

[0008] The effect achieved by the above components is: through the provision of the aluminum-plastic film packaging bag, the battery body is packaged and protected by the aluminum-plastic film packaging bag after assembly, thereby making the composition of the battery body more stable, preventing the problem of loose components, and improving the service life of the secondary battery.

[0009] Preferably, the surface of the battery body is provided with tab glue at the positive tab and the negative tab respectively.

[0010] The effect achieved by the above components is: through the provision of the tab glue, the installation of the positive tab and the negative tab is made more stable and firm, thereby ensuring the integrity of the entire secondary battery and not easily causing problems such as leakage.

[0011] Preferably, a deep pit is provided on the inner wall of the battery body, and a shallow pit is provided on the inner wall of the battery body on one side of the deep pit. The positive electrode ear is installed at the deep pit position of the battery body, and the positive electrode ear and the negative electrode ear are bent toward the top sealing area. The position where the positive electrode ear is welded to the current collector faces the deep pit surface, and the position where the negative electrode ear is welded to the current collector faces the shallow pit surface.

[0012] The effect achieved by the above components is: by setting deep pits and shallow pits, it can prevent the current collector from being damaged or the tabs from falling off due to the tension generated when the aluminum-plastic film packaging bag is sealed. Since the material of the positive electrode current collector is relatively soft, if the welding position is facing the shallow pit surface and there is no current collector as support, the pulling force generated during packaging will directly act on the current collector, causing damage to the current collector and falling off of the tabs.

[0013] Preferably, the inner wall of the battery body is provided with a third protective glue and a fourth protective glue at the location of the negative electrode tab, and the inner wall of the battery body is provided with a first protective glue and a second protective glue at the location of the positive electrode tab. The above components achieve the following effects: by providing protective glue at the assembly locations of the positive and negative electrode tabs and extending the protective glue beyond the edge of the electrode assembly, a gap is created between the protective glue and the top seal, thereby preventing the protective glue from extending to the top seal during the top seal area, affecting the package, resulting in poor sealing performance and causing leakage.

[0014] Preferably, the assembly position of the positive electrode tab is provided with a first safety glue and a second safety glue, and the assembly position of the negative electrode tab is provided with a third safety glue and a fourth safety glue.

[0015] The effect achieved by the above components is: by setting safety glue at the assembly position of the positive and negative tabs, a good protection effect is provided for the exposed current collector in the tab slot inside the battery and the active layer in the other pole piece, preventing short circuits caused by contact and affecting the use of the battery body.

[0016] Preferably, an electrical device is used for the battery.

[0017] In summary, the beneficial effects of the present invention are as follows:

[0018] When the secondary battery is packaged, the tabs are not easily fixed on the current collector and fall off, which can make full use of the head space, improve the battery energy density and use effect, and also improve the sealing of the battery, prevent the occurrence of problems such as leakage, and extend the service life of the secondary battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 Cross-sectional view at the middle AA position;

[0021] Figure 3 For this utility model Figure 1 Cross-sectional view at the middle BB position.

[0022] Legend: 1. Battery body; 2. Positive ear; 3. Negative ear; 4. Top seal area; 5. Side seal; 6. Ear glue; 7. Positive electrode sheet; 8. Negative electrode sheet; 9. Aluminum-plastic film packaging bag; 10. Deep pit; 11. Shallow pit; 12. Diaphragm; 13. First safety glue; 14. First protective glue; 15. Second safety glue; 16. Third safety glue; 17. Fourth safety glue; 18. Second protective glue; 19. Third protective glue; 20. Fourth protective glue. DETAILED DESCRIPTION

[0023] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0024] See also Figure 1-Figure 3The utility model provides a battery and an electrical device, including a battery body 1, the battery body 1 includes two shells, the inner wall of one of the two shells is provided with a deep pit 10, the inner wall of the other of the two shells is provided with a shallow pit 11, the side of the battery body 1 is provided with a side sealing edge 5, the side of the head of the battery body 1 is provided with a top sealing area 4, the surface of the battery body 1 is fixedly connected to the positive ear 2, the surface of the battery body 1 is located on the side of the positive ear 2 and is fixedly connected to the negative ear 3, the battery body 1 is staggered with positive electrode sheets 7 and negative electrode sheets 8, and the positive electrode sheets 7 and the negative electrode sheets 8 are in a wound or stacked state, the positive electrode sheet 7 is fixedly connected to the positive ear 2, and the negative electrode sheet 8 is fixedly connected to the negative ear 3, the inner wall of the battery body 1 is located on the surface of the positive electrode sheet 7 and the negative electrode sheet 8, respectively, with a diaphragm 12 fixedly connected. When the secondary battery is manufactured and packaged, the positive ear 2 is firstly placed on the battery body 1. The positive electrode sheet 7 and the negative electrode sheet 3 are assembled to the designated position of the battery body 1, and the aluminum-plastic film packaging bag 9 is punched, and then the positive electrode sheet 7 and the negative electrode sheet 8 after winding / stacking are completed are placed in the deep pit 10 of the aluminum-plastic film packaging bag 9. The surfaces of the positive electrode sheet 7 and the negative electrode sheet 8 are provided with a diaphragm 12, and the battery top sealing area 4 and the unilateral side sealing area are heat-sealed, and then the heat-sealed battery is injected with liquid. After injecting an appropriate amount of liquid, a vacuum is formed and the battery is allowed to stand at a high temperature. Then, after standing in a vacuum, the battery is divided into volumes, and the battery cell after the volume division is vacuumed, and then the unilateral side sealing area is heat-sealed, the air bag is removed, and finally the side sealing edge 5 of the battery cell is folded. At this time, the ear of the secondary battery is not easy to fall off on the current collector during packaging, the head space can be fully utilized, the battery energy density and use effect can be improved, the sealing of the battery is also improved, the occurrence of problems such as leakage is prevented, and the service life of the secondary battery is extended.

[0025] See also Figure 1-Figure 3 In one embodiment, the surface of the battery body 1 is heat-sealed and protected by an aluminum-plastic film packaging bag 9. By providing the aluminum-plastic film packaging bag 9, the battery body 1 is packaged and protected by the aluminum-plastic film packaging bag 9 after assembly, thereby making the composition of the battery body 1 more stable, and less likely to have problems with loose components, thereby improving the service life of the secondary battery. The surface of the battery body 1 is provided with tab glue 6 at the positions of the positive tab 2 and the negative tab 3. The provision of the tab glue 6 makes the installation of the positive tab 2 and the negative tab 3 more stable and firm, thereby ensuring the integrity of the entire secondary battery and less likely to cause problems such as leakage.

[0026] See also Figure 1-Figure 3In one embodiment, a deep pit 10 is provided on the inner wall of the battery body 1, and a shallow pit 11 is provided on the inner wall of the battery body 1 on one side of the deep pit 10. The positive electrode ear 2 is installed at the position of the deep pit 10 of the battery body 1, and the positive electrode ear 2 and the negative electrode ear 3 are bent toward the top sealing area 4. The position where the positive electrode ear 2 is welded to the current collector faces the deep pit 10, and the position where the negative electrode ear 3 is welded to the current collector faces the shallow pit 11. The arrangement of the deep pit 10 and the shallow pit 11 can prevent the current collector from being damaged or the ear from falling off due to the tension generated when the aluminum-plastic film packaging bag 9 is sealed. Since the material of the positive electrode current collector is relatively soft, if the welding position faces the shallow pit 11, there is no current collector as support, and the pulling force generated during packaging will directly act on the current collector, resulting in damage to the current collector and falling off of the ear.

[0027] See also Figure 1-Figure 3 In one embodiment, a third protective glue 19 and a fourth protective glue 20 are provided on the inner wall of the battery body 1 at the position of the negative electrode ear 3, and a first protective glue 14 and a second protective glue 18 are provided on the inner wall of the battery body 1 at the position of the positive electrode ear 2. By providing protective glue at the assembly position of the positive electrode ear 2 and the negative electrode ear 3, and extending the protective glue beyond the edge position of the electrode assembly, a gap is created between the protective glue and the top seal, thereby preventing the protective glue from extending to the top seal when the top seal area 4 is sealed, affecting the packaging, resulting in poor sealing performance and leakage. A first safety glue 13 and a second safety glue 15 are provided at the assembly position of the positive electrode ear 2, and a third safety glue 16 and a fourth safety glue 17 are provided at the assembly position of the negative electrode ear 3. By providing safety glue at the assembly positions of the positive electrode ear 2 and the negative electrode ear 3, a good protection effect is achieved for the exposed current collector in the electrode ear groove inside the battery and the active layer in the other electrode sheet, thereby preventing short circuit caused by contact and affecting the use of the battery body 1.

[0028] Working principle: When the secondary battery is manufactured and packaged, the positive electrode ear 2 and the negative electrode ear 3 are first assembled to the designated position of the battery body 1, and the ear glue 6 is applied. At the same time, the positive electrode ear 2 and the negative electrode ear 3 are bent toward the top sealing area 4, and the angle between the positive electrode ear 2 and the negative electrode ear 3 and the bending area is θ, 10°<θ<60°, and the aluminum-plastic film packaging bag 9 is punched to form a deep pit 10 surface and a shallow pit 11 surface of the aluminum-plastic film packaging bag 9. Then, the positive electrode sheet 7 and the negative electrode sheet 8 after winding / stacking are placed in the deep pit 10 surface of the aluminum-plastic film packaging bag 9 (the surface of the positive electrode sheet 7 and the negative electrode sheet 8 is provided with a diaphragm 12), and the third protective glue 19 and the fourth protective glue 20 are provided at the position of the negative electrode ear 3, and the first protective glue 14 and the second protective glue 18 are provided at the position of the positive electrode ear 2. A first safety glue 13 and a second safety glue 15 are set at the assembly position of the positive electrode ear 2, and a third safety glue 16 and a fourth safety glue 17 are set at the assembly position of the negative electrode ear 3, and the battery top sealing area 4 and the unilateral side sealing area are heat-sealed, and then the heat-sealed battery is injected with liquid, and a proper amount of liquid is injected to form a vacuum and high-temperature static state, and then the capacity is divided after vacuum static state, and the battery cell after capacity division is vacuumed, and then the unilateral side sealing area is heat-sealed, the air bag is cut off, and finally the side sealing edge 5 of the battery cell is folded. At this time, the pole ear of the secondary battery is not easy to fall off on the current collector during packaging, and the head space can be fully utilized, thereby improving the battery energy density and use effect, and also improving the sealing of the battery, preventing the occurrence of problems such as leakage, and extending the service life of the secondary battery.

[0029] The above embodiments merely represent implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A battery, characterized in that: The battery body (1) comprises a battery body, wherein the battery body (1) comprises two shells, wherein a deep pit (10) is provided on the inner wall of one of the two shells, and a shallow pit (11) is provided on the inner wall of the other of the two shells, and a side sealing edge (5) is provided on the side of the battery body (1), and a positive electrode ear (2) is fixedly connected to the surface of the battery body (1), and a negative electrode ear (3) is fixedly connected to the surface of the battery body (1) on one side of the positive electrode ear (2), and a side of the head electrode ear position of the battery body (1) is provided There is a top sealing area (4), and the positive electrode sheets (7) and the negative electrode sheets (8) are alternately arranged inside the battery body (1), and the positive electrode sheets (7) and the negative electrode sheets (8) are in a wound or stacked state, the positive electrode sheet (7) is fixedly connected to the positive electrode ear (2), and the negative electrode sheet (8) is fixedly connected to the negative electrode ear (3), and the inner wall of the battery body (1) is located on the surface of the positive electrode sheet (7) and the negative electrode sheet (8), and a diaphragm (12) is fixedly connected respectively, wherein the angle between the bending area of ​​the positive electrode ear (2) and the negative electrode ear (3) is between 10° and 60°.

2. A battery according to claim 1, characterized in that: A heat-sealed aluminum-plastic film packaging bag (9) is provided on the surface of the battery body (1).

3. A battery according to claim 1, characterized in that: The surface of the battery body (1) is provided with tab glue (6) at the positions of the positive tab (2) and the negative tab (3).

4. A battery according to claim 1, characterized in that: The inner wall of the battery body (1) is provided with a deep pit (10), and the inner wall of the battery body (1) is provided with a shallow pit (11) on one side of the deep pit (10). The positive electrode ear (2) is installed at the position of the deep pit (10) of the battery body (1), and the positive electrode ear (2) and the negative electrode ear (3) are bent toward the top sealing area (4). The positive electrode ear (2) is welded to the position of the current collector facing the deep pit (10), and the negative electrode ear (3) is welded to the position of the current collector facing the shallow pit (11).

5. A battery according to claim 1, characterized in that: The inner wall of the battery body (1) is provided with a third protective glue (19) and a fourth protective glue (20) at the position of the negative electrode ear (3), and the inner wall of the battery body (1) is provided with a first protective glue (14) and a second protective glue (18) at the position of the positive electrode ear (2).

6. A battery according to claim 1, characterized in that: The assembly position of the positive electrode tab (2) is provided with a first safety glue (13) and a second safety glue (15), and the assembly position of the negative electrode tab (3) is provided with a third safety glue (16) and a fourth safety glue (17).

7. An electrical device, characterized in that: Used in the battery according to any one of claims 1 to 6.

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