A button battery pack and a manufacturing method thereof

Abstract

The present invention discloses a button battery pack and a manufacturing method thereof, comprising: a connection shell, a first battery, a second battery, a first component, and a second component; wherein, the first battery, the first component, and the second battery are sequentially arranged in the connection shell, and the first battery is welded to the connection shell; the first battery and the second battery are connected in the same polarity through the first component; the second component is welded to the other pole of the second battery; thus, while improving the output power of the battery, the volume of the battery or the battery pack is effectively reduced, which has very strong practicability and high reliability.

Description

Technical Field

[0001] The present invention relates to the field of button batteries, and particularly to a button battery pack and a manufacturing method thereof. Background Art

[0002] At present, button batteries are increasingly widely used and are involved in many fields, such as electronic products, military products, medical devices, etc. In recent years, the development of electronic products has been very rapid. With the diversification of products and the expanding application fields, many electronic products have put forward high requirements for the capacity, volume and output power of the batteries used in order to facilitate customers' use, and are developing towards the trend of portability. To meet the market demand, it is imperative to develop new high-power batteries.

[0003] However, the button batteries on the current market have a small continuous discharge current and low output power; while soft-pack batteries cannot meet the market demand due to factors such as too large volume, poor mechanical strength and low safety. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a button battery pack and a manufacturing method thereof, which effectively reduce the volume of the battery or battery pack while improving the output power of the battery.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] Embodiments of the present invention provide a button battery pack, including: a connection shell, a first battery, a second battery, a first component and a second component; wherein,

[0007] The first battery, the first component and the second battery are sequentially arranged in the connection shell, and the first battery is welded to the connection shell;

[0008] The first battery and the second battery are connected in the same polarity through the first component;

[0009] The second component is welded to the other pole of the second battery.

[0010] Wherein, the first battery and the second battery are respectively welded to the connection shell through the sides.

[0011] Wherein, the first component includes a base solder tab, a connecting piece and an extended solder tab, and the base solder tab and the extended solder tab are horizontally parallel and have different horizontal position heights.

[0012] Wherein, the first component further includes a spring piece, the spring piece is arranged between the first battery and the second battery, one side of the spring piece is connected to the base solder tab or one pole of the first battery, and the other side of the spring piece is connected to one pole of the second battery.

[0013] Among them, the connection shell includes a first notch, and the extended solder tab extends out of the connection shell through the first notch.

[0014] Among them, the first notch is a U-shaped notch or a V-shaped notch.

[0015] Among them, the second component is welded to the second battery, the second component extends out of the connection shell, and the extending direction of the second component is different from the extending direction of the extended solder tab.

[0016] An embodiment of the present invention further provides a method for manufacturing a button battery pack, including:

[0017] Winding a steel strip around the outside of the first battery or directly stamping the steel strip by a mold to form a connection shell, and welding the first battery and the connection shell;

[0018] Welding the first component to one pole of the first battery;

[0019] Welding one pole of the second battery to the other side of the first component, wherein the first battery and the second battery are connected with the same pole through the first component;

[0020] Welding the second component to the other pole of the second battery.

[0021] A button battery pack and a manufacturing method thereof provided by an embodiment of the present invention include: a connection shell, a first battery, a second battery, a first component, and a second component; wherein, the first battery, the first component, and the second battery are sequentially arranged in the connection shell, and the first battery is welded to the connection shell; the first battery and the second battery are connected with the same pole through the first component; the second component is welded to one pole of the second battery; thus, while improving the output power of the battery, the volume of the battery or the battery pack is effectively reduced, which has very strong practicability and high reliability. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a button battery pack provided by an embodiment of the present invention;

[0023] Figure 2 It is an exploded view of a button battery pack provided by an embodiment of the present invention;

[0024] Figure 3 It is a connection diagram of a first component and a connection shell provided by an embodiment of the present invention;

[0025] Figure 4 It is a schematic cross-sectional view of a button battery pack provided by an embodiment of the present invention;

[0026] Figure 5 Schematic flow chart of the preparation method of the button battery pack provided in an embodiment of the present invention.

[0027] In the figure, there are connection shell 1, first battery 2, first component 3, second battery 4, second component 5, base solder tab 6, connecting piece 7, extended solder tab 8, and elastic piece 9. Detailed implementation manners

[0028] To better illustrate this embodiment, some components in the drawings are omitted, enlarged or reduced, which do not represent the sizes of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. For ordinary technicians in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0029] Refer to Figures 1 to 4 , a button battery pack provided in an embodiment of the present invention, includes: connection shell 1, first battery 2, second battery 4, first component 3, and second component 5; wherein,

[0030] The first battery 2, the first component 3, and the second battery 4 are sequentially placed in the connection shell 1, and the first battery 2 is welded to the connection shell 1;

[0031] The first battery 2 and the second battery 4 are connected in the same polarity through the first component 3;

[0032] The second component 5 is welded to the other pole of the second battery 4.

[0033] Here, the first battery 2 and the second battery 4 are placed in the connection shell 1, and at the same time, the first component 3 is used to connect the first battery 2 and the second battery 4 respectively, and the outer shells of the two batteries are connected in the same polarity to form a parallel-connected battery pack of the two batteries. Here, the connection shell 1 can be an external metal shell. In this way, the current output load capacity of the battery pack is increased, and the overall stability, storage performance, consistency, and anti-leakage performance of the battery are improved, and the service life of the battery is extended.

[0034] Here, the first component 3 is welded to the negative electrode surface of the first battery 2 placed in the connection shell 1 and does not contact the connection shell 1. The second battery 4 is installed in place. The negative electrode surface of the second battery 4 is in close contact with the first component 3 and is well connected and fixed through side welding. The second component 5 can be welded and fixed to the positive electrode of the battery pack according to requirements.

[0035] In an optional embodiment, the first battery 2 and the second battery 4 are respectively welded to the connection shell 1 through the sides.

[0036] Here, the inner diameter of the connection shell 1 is adapted to the outer diameters of the first battery 2 and the second battery 4. The negative electrode of the first battery 2 is inserted into place in the direction consistent with the opening of the connection shell 1, or good connection is achieved through side welding.

[0037] In an alternative embodiment, the first component 3 includes a base solder tab 6, a connecting member 7, and an extended solder tab 8. The base solder tab 6 and the extended solder tab 8 are horizontally parallel and have different horizontal position heights.

[0038] Here, the connecting member 7 is perpendicular to the base solder tab 6 and the extended solder tab 8 respectively. The base solder tab 6 is connected to one pole of the first battery 2 and extends outward, and then the direction is changed through the connecting member 7, finally making the base solder tab 6 and the extended solder tab 8 at different heights.

[0039] In an alternative embodiment, see Figure 2 and Figure 3 , the first component 3 further includes a spring piece 9. The spring piece 9 is placed between the first battery 2 and the second battery 4. One side of the spring piece 9 is connected to the base solder tab 6 or one pole of the first battery 2, and the other side of the spring piece 9 is connected to one pole of the second battery 4.

[0040] Here, the spring piece 9 can be made of iron-chromium-aluminum alloy. The spring piece can be welded to the base solder tab or on one side of the base solder tab, and is used for the parallel contact of the negative electrode surfaces of two button cells. One end of the spring piece is welded to the negative electrode surface of the battery, and the other end can freely extend when pressed. The welding position of the spring piece is appropriate, generally at the center position of the button cell to avoid the possibility of contact with the positive electrode surface.

[0041] In an alternative embodiment, the connection shell 1 includes a first notch. The extended solder tab extends outside the connection shell 1 through the first notch.

[0042] Here, the first notch is a U-shaped notch or a V-shaped notch; the extended solder tab has a uniform and symmetric gap with the welding steel strip at the first notch, and insulating glue (such as: 703 / 704 silicone rubber) is filled to cure and position to avoid contact short circuit.

[0043] In an alternative embodiment, the second component 5 is welded to the second battery 4, and the second component 5 extends outside the connection shell 1. The extending direction of the second component 5 outside is different from the extending direction of the extended solder tab.

[0044] Here, the extending directions of the first component 3 and the second component 5 outside are different, ensuring the convenience of positive and negative electrode connection. <,

[0045] In another embodiment, as Figure 5 shown, a method for manufacturing a button battery pack is further provided, including:

[0046] Step S1: Wind the steel strip around the outside of the first battery 2 to form a connection shell 1, and weld the first battery 2 to the connection shell 1;

[0047] Here, when welding, ensure that the edge of the steel strip is flush with the positive electrode surface of the first battery 2 and does not protrude above the battery positive electrode surface.

[0048] Step S2: Weld the first component 3 to one pole of the first battery 2;

[0049] Step S3: Weld one pole of the second battery 4 to the other side of the first component 3, wherein the first battery 2 and the second battery 4 are connected with the same pole through the first component 3;

[0050] Step S4: Weld the second component 5 to the other pole of the second battery 4.

[0051] In summary, compared with the prior art, the button-type battery pack and its manufacturing method provided by the embodiment of the present invention include: a connection shell 1, a first battery 2, a second battery 4, a first component 3, and a second component 5; wherein, the first battery 2, the first component 3, and the second battery 4 are sequentially placed in the connection shell 1, and the first battery 2 is welded to the connection shell 1; the first battery 2 and the second battery 4 are connected with the same pole through the first component 3; the second component 5 is welded to one pole of the second battery 4; thus, while improving the output power of the battery, the volume of the battery or the battery pack is effectively reduced, which has very strong practicability and high reliability.

[0052] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and scope of the present invention are included in the protection scope of the present invention.

Claims

1. A button battery pack, characterized in that, Comprising: A connection shell, a first battery, a second battery, a first component, and a second component; wherein, The first battery, the first component, and the second battery are sequentially disposed within the connection shell, and the first battery is welded to the connection shell; The first battery and the second battery are connected in the same polarity through the first component; The second component is welded to the other pole of the second battery; the first component is welded to the negative electrode surface of the first battery disposed within the connection shell and does not contact the connection shell, and the first battery and the second battery are respectively welded to the connection shell through the sides; the first component includes a base solder tab, a connecting member, and an extending solder tab, the base solder tab and the extending solder tab are horizontally parallel and have different horizontal position heights; the connection shell includes a first notch, and the base solder tab extends outside the connection shell through the first notch; the connection shell is an externally installed metal shell.

2. The button cell battery pack according to claim 1, characterized in that, The first component further includes a spring piece, the spring piece is disposed between the first battery and the second battery, one side of the spring piece is connected to the base solder tab or one pole of the first battery, and the other side of the spring piece is connected to one pole of the second battery.

3. The button cell battery pack according to claim 1, characterized in that, The first notch is a U-shaped notch or a V-shaped notch.

4. The button cell battery pack according to claim 1, wherein The second component is welded to the second battery, the second component extends outside the connection shell, and the extending direction of the second component outside the connection shell is different from the extending direction of the extending solder tab.

5. A method for manufacturing a button battery pack as described in any one of claims 1-4, characterized in that, Comprising: Wrapping a steel strip around the outside of the first battery or directly stamping the steel strip by a mold to form a connection shell, and welding the first battery to the connection shell; Welding the first component to one pole of the first battery; Welding one pole of the second battery to the other side of the first component, wherein the first battery and the second battery are connected in the same polarity through the first component; Welding the second component to the other pole of the second battery.

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