Square battery and electronic device thereof

Abstract

The utility model relates to the technical field of batteries, and discloses a square battery, which comprises a battery cell main body fixedly connected with a positive tab and a negative tab, and further comprises a rigid metal shell coated outside the battery cell main body, the rigid metal shell comprises a first rigid metal shell and a second rigid metal shell, the first rigid metal shell and the second rigid metal shell are welded into a whole through laser, the front surface of the battery cell main body is bonded with the first rigid metal shell, the rear surface of the battery cell main body is bonded with the second rigid metal shell, and the rigid metal shells achieve the purpose of sealing the square battery, so that the battery cell main body can be effectively protected, and the service life of the square battery is prolonged. And the compression resistance and the mechanical shock resistance of the square battery are improved. The utility model further discloses an electronic device adopting the square battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a square battery and an electronic device thereof. Background Art

[0002] With the increasing acceleration of the development of electronic products, button batteries have been widely used in various electronic products due to their simple structure and high safety, and are mainly used as the power supply for various electronic products, such as Bluetooth headsets, mobile power supplies, tablet computers, mobile phones, cameras, etc.

[0003] For current square batteries, only a layer of adhesive tape or plastic shell is wrapped outside, with low operating efficiency, weak impact resistance and compressive resistance, and it is easy to cause the battery to be crushed by extrusion or the battery to leak liquid due to falling during the use of the product, posing a safety hazard. And people's requirements for square batteries are also increasing day by day. Square batteries not only need to have a high energy density, but also need certain compressive resistance and mechanical impact resistance. To meet the market demand, new types of square batteries need to be developed. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned defects in the prior art, and provide a square battery and an electronic device thereof, which are used to solve the problem that the existing square battery is easy to be crushed and the battery leaks liquid due to falling, causing safety hazards.

[0005] To achieve the above purpose, in the first aspect, the utility model provides a square battery, including a core body, the core body is fixedly connected with a positive electrode tab and a negative electrode tab, and further includes a rigid metal shell covering the outside of the core body, the rigid metal shell includes a first rigid metal shell and a second rigid metal shell, the first rigid metal shell and the second rigid metal shell are welded into one body by laser, the front surface of the core body is bonded to the first rigid metal shell, and the rear surface of the core body is bonded to the second rigid metal shell.

[0006] Preferably, a first adhesive layer is provided on the front surface of the core body, the first adhesive layer is bonded to the first rigid metal shell, a second adhesive layer is provided on the rear surface of the core body, and the second adhesive layer is bonded to the second rigid metal shell.

[0007] Preferably, an insulating component is arranged between the rigid metal shell and the core body, the insulating component includes a head high-temperature adhesive installed on the top of the core body and covering the positive electrode tab and the negative electrode tab, a bottom high-temperature adhesive installed at the bottom of the core body, and side high-temperature adhesives are respectively arranged on both sides of the core body.

[0008] Preferably, it further includes a connecting piece welded on the positive electrode tab and the negative electrode tab, and one end of the connecting piece is located in the head high-temperature adhesive.

[0009] Preferably, it further includes nickel sheets welded to the positive electrode tab and the negative electrode tab, a PCM board welded to the nickel sheets, and a connecting member welded to the PCM board. The nickel sheets and the PCM board are located in the high-temperature glue at the head, and both the nickel sheets and the PCM board are accommodated between the first rigid metal shell and the second rigid metal shell.

[0010] The nickel sheets and the PCM board are located in the high-temperature glue at the head, and both the nickel sheets and the PCM board are accommodated between the first rigid metal shell and the second rigid metal shell.

[0011] Preferably, it further includes a high-temperature glue for the PCM board installed on the PCM board, and the high-temperature glue for the PCM board is accommodated between the first rigid metal shell and the second rigid metal shell.

[0012] Preferably, the top edge and the bottom edge of the first rigid metal shell are respectively bent inward to form a first folded plate, and the top edge and the bottom edge of the second rigid metal shell are respectively bent inward to form a second folded plate.

[0013] Preferably, the two side edges of the first rigid metal shell are respectively bent outward to form an L-shaped third folded plate, and the two side edges of the second rigid metal shell are respectively bent outward to form an L-shaped fourth folded plate.

[0014] Preferably, the outer side edges of the third folded plate and the fourth folded plate respectively have at least one pair of corresponding hanging ears protruding outward, and the corresponding hanging ears are provided with communicating mounting holes.

[0015] In a second aspect, the present invention further provides an electronic device, including a device shell, and further including a square battery according to any one of the first aspect for providing electrical energy, and the square battery is arranged inside the device shell.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, the rigid metal shell of the battery cell body realizes the purpose of sealing the square battery, can effectively protect the battery cell body, improves the compressive performance and the anti-mechanical shock performance of the square battery. The rigid metal shell bonds the battery cell body through the first adhesive layer and the second adhesive layer, without damaging the battery cell body and improving the convenience and effect of bonding; the rigid metal shell is formed by a bending process, and the cost is lower than that of the traditional stamping shell. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional schematic diagram of a square battery provided in Embodiment 1 of the present invention;

[0020] Figure 2 It is an exploded structural schematic diagram of a square battery provided in Embodiment 1 of the present invention;

[0021] Figure 3 It is a three-dimensional schematic diagram of a square battery after removing the rigid metal shell provided in Embodiment 1 of the present invention;

[0022] Figure 4 It is a three-dimensional schematic diagram of a square battery after removing the rigid metal shell, PCM board high-temperature adhesive and head high-temperature adhesive provided in Embodiment 1 of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the rigid metal shell in a square battery provided in Embodiment 1 of the present invention.

[0024] In the figure, there are included:

[0025] 1. First rigid metal shell; 11. First folding plate; 12. Third folding plate; 15. First opening; 2. Core body; 21. Positive electrode tab; 22. Negative electrode tab; 3. Connecting piece; 4. Insulating component; 41. Head high-temperature adhesive; 42. Bottom high-temperature adhesive; 43. Side high-temperature adhesive; 6. Second rigid metal shell; 61. Second folding plate; 62. Fourth folding plate; 65. Second opening; 8. First adhesive layer; 9. Second adhesive layer; 10. Nickel sheet; 110. PCM board; 120. PCM board high-temperature adhesive; 130. Hanging ear; 140. Mounting hole; 16. Rigid metal shell. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the present embodiments of the present invention in conjunction with the drawings in the present embodiments of the present invention. Obviously, the described present embodiments are one embodiment of the present invention, rather than all embodiments of the present invention. Based on the present embodiments of the present invention, all other present embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Example 1

[0028] Please refer to Figures 1 to 5 , an embodiment of the present utility model provides a square battery. Other methods such as label stickers, inkjet printing, laser engraving, etc. can be selected to reflect battery information on the outer surface of a square battery. It includes a battery cell main body 2, and a positive electrode tab 21 and a negative electrode tab 22 are fixedly connected to the battery cell main body 2. It also includes a rigid metal shell 16 wrapped outside the battery cell main body 2. The rigid metal shell 16 includes a first rigid metal shell 1 and a second rigid metal shell 6. The first rigid metal shell 1 and the second rigid metal shell 6 are welded into one body by laser welding, and the first rigid metal shell 1 and the second rigid metal shell 6 achieve the purpose of sealing the square battery. The front surface of the battery cell main body 2 is adhered to the first rigid metal shell 1, and the rear surface of the battery cell main body 2 is adhered to the second rigid metal shell 6. The first rigid metal shell 1 and the second rigid metal shell 6 are oppositely arranged on the front and rear surfaces of the battery cell main body 2 to wrap the battery cell main body 2. When the square battery is subjected to external force impact or extrusion, the first rigid metal shell 1 and the second rigid metal shell 6 can effectively protect the battery cell main body 2 and prevent potential safety hazards.

[0029] Furthermore, please refer to Figure 1 and Figure 2 , a first adhesive layer 8 is provided on the front surface of the battery cell main body 2. The first adhesive layer 8 is adhered to the first rigid metal shell 1. A second adhesive layer 9 is provided on the rear surface of the battery cell main body 2. The second adhesive layer 9 is adhered to the second rigid metal shell 6. The battery cell main body 2 is connected to the first rigid metal shell 1 through the first adhesive layer 8, and the battery cell main body 2 is connected to the second rigid metal shell 6 through the second adhesive layer 9. The battery cell main body 2, the positive electrode tab 21, the negative electrode tab 22, the first adhesive layer 8 and the second adhesive layer 9 are all accommodated inside the rigid metal shell 16.

[0030] It should be noted that the first adhesive layer 8 and the second adhesive layer 9 can be double-sided adhesive tapes, or other adhesives such as double-sided adhesive foam and spacers, and no specific limitation is made here. The rigid metal shell 16 is a steel structure part, made of steel material, and its thickness can be selected from 0.05 - 0.5 mm.

[0031] Furthermore, please refer to Figures 2 to 4, an insulating component 4 is provided between the rigid metal housing 16 and the battery cell main body 2. The insulating component 4 includes a head high-temperature adhesive 41 installed on the top of the battery cell main body 2 and wrapping the positive electrode tab 21 and the negative electrode tab 22, a bottom high-temperature adhesive 42 installed at the bottom of the battery cell main body 2, and side high-temperature adhesives 43 are respectively provided on both sides of the battery cell main body 2. The side high-temperature adhesives 43 are attached to both sides of the battery cell main body 2 and wrap the folded edges of the battery cell main body 2. The high-temperature adhesive has good bonding performance. The battery cell main body 2 is coated with the head high-temperature adhesive 4, the bottom high-temperature adhesive 5, and the side high-temperature adhesives 43, so that the battery cell main body 2 is still protected against sealing, insulation, and corrosion in a high-temperature environment.

[0032] Further, please refer to Figures 1 to 5 , this square battery further includes a connector 3 welded to the positive electrode tab 21 and the negative electrode tab 22. The connector 3 can be directly connected to the positive electrode tab 21 and the negative electrode tab 22 on the battery cell main body 2, with low cost. One end of the connector 3 is located inside the head high-temperature adhesive 41. It should be noted that the connector 3 can be a terminal wire or an electronic wire, a formed nickel sheet, an FPC, and is not specifically limited herein.

[0033] Of course, the connector 3 can also not be directly connected to the positive electrode tab 21 and the negative electrode tab 22 on the battery cell main body 2. A nickel sheet 10 can be welded to the positive electrode tab 21 and the negative electrode tab 22, a PCM board 110 can be welded to the nickel sheet 10, and the connector 3 can be welded to the PCM board 110. The PCM board 110 plays a role in protecting the battery. At this time, the nickel sheet 10 and the PCM board 110 are located inside the head high-temperature adhesive 4, and the nickel sheet 10 and the PCM board 110 are both accommodated between the first rigid metal housing 1 and the second rigid metal housing 6. The power output sequence inside the battery cell main body 2 is from the nickel sheet 10 to the PCM board 110, then to the connector 3, and finally the power on the connector 3 is transmitted to other electronic devices. For the power output conditions, the PCM board 110 can be welded to the nickel sheet 10, the connector 3 can be welded to the PCM board 110, and both the positive electrode tab 21 and the negative electrode tab 22 can be welded to the nickel sheet 10. The nickel sheet 10 is a commonly used conductive material for connecting between the battery cell electrode tabs. With its high conductivity, good processability and weldability, excellent corrosion resistance and high temperature resistance, and good compatibility with the negative electrode graphite, it not only ensures the stable transmission of the internal current of the battery and the stable performance of the battery, but also improves the safety and stability of the battery.

[0034] Further, please refer to Figure 2 and Figure 3 , this square battery further includes a PCM board high-temperature adhesive 120 installed on the PCM board 110. The PCM board high-temperature adhesive 120 is located outside the connector 3 and is accommodated between the first rigid metal housing 1 and the second rigid metal housing 6.

[0035] Further, please refer to Figure 1and Figure 2 The top and bottom edges of the first rigid metal housing 1 are bent inward to form first folded plates 11 respectively, and the top and bottom edges of the second rigid metal housing 6 are bent inward to form second folded plates 61 respectively. The two side edges of the first rigid metal housing 1 are bent outward to form L-shaped third folded plates 12, and the two side edges of the second rigid metal housing 6 are bent outward to form L-shaped fourth folded plates 62. It should be noted that the first folded plates 11 and the second folded plates 61 are overlapped and not welded together. The third folded plates 12 and the fourth folded plates 62 are welded, which saves costs compared with traditional full welding. The first folded plates 11, the second folded plates 61, the third folded plates 12 and the fourth folded plates 62 are realized by a bending process. There is a gap between the first folded plates 11 and the third folded plates 12, and there is a gap between the second folded plates 61 and the fourth folded plates 62. Of course, the first folded plates 11, the second folded plates 61, the third folded plates 12 and the fourth folded plates 62 can also be realized by a stretching process. In this case, there is no gap between the first folded plates 11 and the third folded plates 12, and there is no gap between the second folded plates 61 and the fourth folded plates 62.

[0036] At least one corresponding hanging ear 130 protruding outward is respectively provided on the outer sides of the third folded plates 12 and the fourth folded plates 62, and through holes 140 communicating with each other are formed in the corresponding hanging ears 130. Fasteners (not shown in the drawings) are connected between the through holes 140. It should be noted that the fasteners can be bolts or other fasteners, and no specific limitation is made here.

[0037] Further, please refer to Figures 1 to 3 The top of the first rigid metal housing 1 is provided with a first opening 15 for the connector 3 to pass through, and the top of the second rigid metal housing 6 is provided with a second opening 65 for the connector 3 to pass through. The top of the connector 3 passes through the first opening 15 and the second opening 65 and extends to the outside, which facilitates the connection of the connector 3 to other electronic devices.

[0038] The working principle of a square battery in this embodiment is:

[0039] The power output sequence within the battery cell main body 2 is from the nickel sheet 10 to the PCM board 110 and then to the connecting member 3. Finally, the connecting member 3 delivers the electric energy to other electronic devices. The head high-temperature adhesive 4 installed on the top of the battery cell main body 2 and wrapping the positive electrode tab 21, negative electrode tab 22, and the connecting member 3, the bottom high-temperature adhesive 5 installed at the bottom of the battery cell main body 2, and the side high-temperature adhesive 43 installed on the side of the battery cell main body 2 ensure that the battery cell main body 2 is still protected against sealing, insulation, and corrosion in a high-temperature environment. The battery cell main body 2, positive electrode tab 21, negative electrode tab 22, head high-temperature adhesive 41, bottom high-temperature adhesive 42, side high-temperature adhesive 43, first adhesive layer 8, and second adhesive layer 9 are all accommodated between the first rigid metal housing 1 and the second rigid metal housing 6. The first rigid metal housing 1 and the second rigid metal housing 6 achieve the purpose of sealing the square battery. The first rigid metal housing 1 and the second rigid metal housing 6 are steel structure parts, which can effectively protect the battery cell main body 2 and improve the compressive resistance and anti-mechanical shock performance of the square battery. The battery cell main body 2 is coated with the insulation component 4, so that the battery cell main body 2 is still protected against sealing, insulation, and corrosion in a high-temperature environment, and the high-temperature adhesive maintains good bonding performance.

[0040] Embodiment 2

[0041] The present utility model also provides an electronic device (not shown in the drawings), including a device housing (not shown in the drawings), and further including the square battery described in Embodiment 1 for providing electric energy. The square battery is disposed inside the device housing to provide electric energy for the electronic device.

[0042] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any changes, modifications, substitutions, combinations, and simplifications made within the spirit and principle of the present utility model shall be equivalent replacement methods and shall be included within the protection scope of the present utility model.

Claims

1. A square battery, comprising a battery body (2), wherein the battery body (2) is fixedly connected with a positive electrode ear (21) and a negative electrode ear (22), characterized in that: It also includes a rigid metal shell (16) covering the outside of the battery cell body (2), wherein the rigid metal shell (16) includes a first rigid metal shell (1) and a second rigid metal shell (6), wherein the first rigid metal shell (1) and the second rigid metal shell (6) are integrated by laser welding, the front surface of the battery cell body (2) is bonded to the first rigid metal shell (1), and the rear surface of the battery cell body (2) is bonded to the second rigid metal shell (6).

2. A square battery according to claim 1, characterized in that: The front surface of the battery cell body (2) is provided with a first adhesive layer (8), the first adhesive layer (8) is bonded to the first rigid metal shell (1), and the rear surface of the battery cell body (2) is provided with a second adhesive layer (9), the second adhesive layer (9) is bonded to the second rigid metal shell (6).

3. A square battery according to claim 1, characterized in that: An insulating component (4) is provided between the rigid metal shell (16) and the battery cell body (2), and the insulating component (4) comprises a head high-temperature glue (41) installed on the top of the battery cell body (2) and wrapping the positive electrode ear (21) and the negative electrode ear (22), a bottom high-temperature glue (42) installed on the bottom of the battery cell body (2), and side high-temperature glue (43) is respectively provided on both sides of the battery cell body (2).

4. A square battery according to claim 3, characterized in that: It also includes a connector (3) welded to the positive electrode ear (21) and the negative electrode ear (22), and one end of the connector (3) is located in the head high-temperature glue (41).

5. A square battery according to claim 3, characterized in that: It also includes a nickel sheet (10) welded to the positive electrode ear (21) and the negative electrode ear (22), a PCM plate (110) welded to the nickel sheet (10), and a connecting piece (3) welded to the PCM plate (110); the nickel sheet (10) and the PCM plate (110) are located in the head high-temperature glue (41); and the nickel sheet (10) and the PCM plate (110) are both accommodated between the first rigid metal shell (1) and the second rigid metal shell (6).

6. A square battery according to claim 5, characterized in that: It also includes a PCM board high temperature glue (120) installed on the PCM board (110), and the PCM board high temperature glue (120) is accommodated between the first rigid metal shell (1) and the second rigid metal shell (6).

7. A square battery according to claim 1, characterized in that: The top edge and bottom edge of the first rigid metal shell (1) are respectively bent inwards to form a first folded plate (11), and the top edge and bottom edge of the second rigid metal shell (6) are respectively bent inwards to form a second folded plate (61).

8. A square battery according to claim 1, characterized in that: The two side edges of the first rigid metal shell (1) are respectively bent outwards to form an L-shaped third folded plate (12), and the two side edges of the second rigid metal shell (6) are respectively bent outwards to form an L-shaped fourth folded plate (62).

9. A square battery according to claim 8, characterized in that: The outer sides of the third folding plate (12) and the fourth folding plate (62) are respectively provided with at least one corresponding hanging ear (130) protruding outwards, and the corresponding hanging ears (130) are provided with interconnected mounting holes (140).

10. An electronic device, comprising a device housing, characterized in that: It also includes a square battery as claimed in any one of claims 1 to 9 for providing electrical energy, wherein the square battery is arranged inside the device housing.

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