Hard Shell Button Battery

Abstract

The present invention relates to a hard shell button battery, comprising an upper shell, a lower shell, an insulating member, a pole core, a first insulating layer, a second insulating layer and an elastic support member; the upper shell and the lower shell are insulated and sealed with each other through the insulating member to form a sealed cavity for accommodating the pole core, the first insulating layer, the second insulating layer and the elastic support member on the inner side of the two; the first pole piece of the pole core leads to a first pole ear attached to the inner wall of the lower shell; the second pole piece of the pole core leads to a second pole ear attached to the inner wall of the upper shell; one end of the elastic support member is supported on the first insulating layer to press the first pole ear against the inner wall of the lower shell, and the other end of the elastic support member is supported on the second insulating layer to press the second pole ear against the inner wall of the upper shell. Compared with the prior art, the elastic support member squeezes the first pole ear and the second pole ear to the lower shell and the upper shell respectively, thereby achieving electrical connection, improving the stability of the electrical connection, and having a simple structure without the need for a welding process.

Description

Technical Field

[0001] The invention belongs to the technical field of button batteries, and in particular relates to a hard shell button battery. Background Art

[0002] Button batteries, also known as button batteries, are batteries that look like a small button. Generally speaking, they have a larger diameter and are thinner (compared to cylindrical batteries such as the No. 5 AA batteries on the market). Button batteries include hard-shell button batteries and soft-pack button batteries.

[0003] Among them, the hard shell button battery is a fully metal shell sealed battery, which is characterized by small battery size and strong sealing, so it is widely used in computers, hearing aids, electronic watches, radios and various small electronic products.

[0004] The existing hard shell button battery includes an upper shell, a lower shell, an insulating part and a pole core. The upper shell and the lower shell are insulated and sealed by an insulating layer to form a sealed cavity, and the pole core is placed in the sealed cavity. There are two main internal electrical connections of the existing hard shell button battery. One is to directly contact the two end surfaces of the pole core through the upper and lower shells to achieve extrusion electrical connection, but the electrical connection effect of this connection method is unstable and prone to short circuit; the other is to weld the positive and negative ears of the pole core to the upper shell and the lower shell respectively to achieve electrical connection, but this connection method has a complex structure, is not easy to process, and has a large internal resistance of the battery. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to provide a hard shell button battery in view of the problems of unstable internal electrical connection effect and complex structure of existing hard shell button batteries.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a hard shell button battery, comprising an upper shell, a lower shell, an insulating member, a pole core, a first insulating layer, a second insulating layer and an elastic support member;

[0007] The upper shell and the lower shell are insulated and sealed with each other through the insulating member to form a sealed cavity inside the upper shell and the lower shell; the pole core, the first insulating layer, the second insulating layer and the elastic support member are accommodated in the sealed cavity;

[0008] The pole core comprises a first pole piece, a diaphragm and a second pole piece, the first pole piece and the second pole piece have opposite polarities, the first pole piece leads to a first pole ear, the first pole ear comprises a first foil attached to the inner wall of the lower shell facing the first end face of the pole core; the second pole piece leads to a second pole ear, the second pole ear comprises a second foil attached to the inner wall of the upper shell facing the second end face of the pole core;

[0009] The first insulating layer is arranged between the first end surface of the pole core and the first foil, the second insulating layer is arranged between the second end surface of the pole core and the second foil, one end of the elastic support member is supported on the first insulating layer to press the first foil against the inner wall of the lower shell, and the other end of the elastic support member is supported on the second insulating layer to press the second foil against the inner wall of the upper shell.

[0010] Optionally, a through hole penetrating the first end surface and the second end surface of the pole core is provided at the axis center of the pole core, and the elastic support member is inserted into the through hole.

[0011] Optionally, a cross-sectional area at any point of the elastic support member is smaller than a cross-sectional area of ​​the through hole.

[0012] Optionally, the elastic support member includes an elastic member passing through the through hole, a first support end and a second support end;

[0013] The top surface of the first supporting end is pressed tightly against the first insulating layer, and the bottom surface of the first supporting end is connected to the first end of the elastic member;

[0014] The top surface of the second supporting end is pressed tightly against the second insulating layer, and the bottom surface of the second supporting end is connected to the second end of the elastic member.

[0015] Optionally, the elastic support member is integrally formed.

[0016] Optionally, the elastic member includes a guide sleeve and an elastic element disposed in the guide sleeve, the bottom surface of the first supporting end is connected to the first end of the elastic element, and the bottom surface of the second supporting end is connected to the second end of the elastic element.

[0017] Optionally, when the pressure in the sealed cavity exceeds a preset value, the upper shell and the lower shell may slide relative to each other.

[0018] Optionally, when the upper shell and the lower shell slide relative to each other to a limit, the elastic support member returns to a free length and no longer compresses the first insulating layer and the second insulating layer.

[0019] Optionally, the upper shell is a cylindrical structure with an opening downward, and the opening edge of the upper shell extends outward to form a first annular folded edge; the lower shell is a cap-shaped structure, and the edge of the lower shell is bent toward the upper shell to form a second annular folded edge that wraps the first annular folded edge.

[0020] Optionally, the insulating member is provided with an external thread, the lower shell is provided with an internal thread matching the external thread, and the insulating member is threadably connected to the lower shell.

[0021] Compared with the prior art, the hard-shell button battery provided in the embodiment of the present invention has an elastic support member that squeezes the first pole ear and the second pole ear to the lower shell and the upper shell respectively, and the first pole ear and the lower shell are directly in contact to achieve electrical connection, and the second pole ear and the upper shell are directly in contact to achieve electrical connection. The structure is simple, and no welding process is required, which reduces the difficulty of processing and facilitates processing and installation; it also improves the stability of the contact between the first pole ear and the lower shell and between the second pole ear and the upper shell, thereby ensuring the stability of the internal electrical connection of the hard-shell button battery. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 yes Figure 1 Reference diagram of the usage status of the hard shell button battery;

[0024] Figure 3 It is a schematic structural diagram of an elastic support member provided in another embodiment of the present invention.

[0025] The reference numerals in the specification are as follows:

[0026] 1. upper shell; 11. first annular folded edge;

[0027] 2. lower shell; 21. second annular fold;

[0028] 3. Insulation parts;

[0029] 4, pole core; 4a, first end surface; 4b, second end surface;

[0030] 41. first pole piece; 42. diaphragm; 43. second pole piece; 44. through hole;

[0031] 5. Elastic support member;

[0032] 51, first supporting end; 511, first supporting portion; 512, first connecting portion; 513, first limiting portion;

[0033] 52, elastic member; 521, support column; 522, guide sleeve; 523, elastic element;

[0034] 53, second supporting end; 531, second supporting portion; 532, second connecting portion; 533, second limiting portion;

[0035] 6. Sealed cavity; 7. First insulating layer; 8. Second insulating layer;

[0036] 9. a first electrode tab; 91. a first foil;

[0037] 10. a second electrode tab; 101. a second foil. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] like Figure 1 As shown, a hard shell button battery provided by an embodiment of the present invention includes an upper shell 1, a lower shell 2, an insulating member 3, a pole core 4, a first insulating layer 7, a second insulating layer 8 and an elastic support member 5;

[0040] The upper shell 1 and the lower shell 2 are insulated and sealed with each other through the insulating member 3 to form a sealed cavity 6 inside the two. The pole core 4, the first insulating layer 7, the second insulating layer 8 and the elastic support member 5 are accommodated in the sealed cavity 6.

[0041] The pole core 4 includes a first pole piece 41, a diaphragm 42 and a second pole piece 43. The first pole piece 41 and the second pole piece 43 have opposite polarities. The first pole piece 41 leads to a first pole ear 9. The first pole ear 9 includes a first foil 91 attached to the inner wall of the first end face 4a of the lower shell 2 facing the pole core 4. The second pole piece 43 leads to a second pole ear 10. The second pole ear 10 includes a second foil 101 attached to the inner wall of the second end face 4b of the upper shell 1 facing the pole core 4.

[0042] The first insulating layer 7 is arranged between the first end face 4a of the pole core 4 and the first foil 91, the second insulating layer 8 is arranged between the second end face 4b of the pole core 4 and the second foil 101, one end of the elastic support member 5 is supported on the first insulating layer 7 to press the first foil 91 against the inner wall of the lower shell 2, and the other end of the elastic support member 5 is supported on the second insulating layer 8 to press the second foil 101 against the inner wall of the upper shell 1.

[0043] Compared with the prior art, the hard-shell button battery provided by the embodiment of the present invention has an elastic support member 5 that squeezes the first foil 91 and the second foil 101 to the lower shell 2 and the upper shell 1 respectively, and the first pole ear 9 and the lower shell 2 are directly in contact to achieve electrical connection, and the second pole ear 10 and the upper shell 1 are directly in contact to achieve electrical connection. The structure is simple, and no welding process is required, which reduces the difficulty of processing and facilitates processing and installation; it also improves the stability of the contact between the first pole ear 9 and the lower shell 2 and between the second pole ear 10 and the upper shell 1, thereby ensuring the stability of the internal electrical connection of the hard-shell button battery; at the same time, the first insulating layer 7 can prevent the first end face 4a of the pole core 4 from directly contacting the first foil 91, and the second insulating layer 8 can prevent the second end face 4b of the pole core 4 from directly contacting the second foil 101, thereby avoiding causing an internal short circuit in the hard-shell button battery.

[0044] It should be noted that the elastic support member 5 is not electrically conductive.

[0045] Specifically, the aluminum foil end of the first pole piece 41 is folded 90 degrees to lead out the first pole tab 9 ; the copper foil end of the second pole piece 43 is folded 90 degrees to lead out the second pole tab 10 .

[0046] In one embodiment, the elastic support member 5 is located at the outer periphery of the pole core 4 , which is convenient for installation and processing, and can buffer the radial compression of the pole core 4 , thereby better protecting the pole core 4 .

[0047] In another embodiment, if Figure 1 As shown, a through hole 44 penetrating the first end face 4a and the second end face 4b of the pole core 4 is provided at the axis of the pole core 4, and the elastic support member 5 is inserted in the through hole 44; the internal space is fully utilized, the diameter of the hard shell button battery is not changed, and the elastic support member 5 is avoided from being arranged outside the pole core 4, thereby increasing the diameter of the hard shell button battery and causing the hard shell button battery to be unable to be installed in the original battery compartment, and the impact on the volume energy density of the hard shell button battery is also reduced.

[0048] Preferably, if Figure 1 As shown, the cross-sectional area of ​​any point of the elastic support member 5 is smaller than the cross-sectional area of ​​the through hole 44; when the upper shell 1 and the lower shell 2 are pressed and fixed, the elastic support member 5 can be compressed until it is completely located in the through hole 44, without changing the height of the hard shell button battery, maintaining the original size of the hard shell button battery, and not affecting the installation of the hard shell button battery, nor affecting the volume energy density of the hard shell button battery.

[0049] In one embodiment, if Figure 1 As shown, the elastic support member 5 includes an elastic member 52 penetrating into the through hole 44, a first support end 51 and a second support end 53;

[0050] The top surface of the first support end 51 is pressed against the first insulating layer 7 , and the bottom surface of the first support end 51 is connected to the first end of the elastic member 52 ; this can provide a better support effect for the first foil 91 and ensure the stability of the electrical connection between the first foil 91 and the lower shell 2 .

[0051] The top surface of the second support end 53 is pressed against the second insulating layer 8 , and the bottom surface of the second support end 53 is connected to the second end of the elastic member 52 , which can provide better support for the second foil 101 and ensure the stability of the electrical connection between the second foil 101 and the upper shell 1 .

[0052] In one embodiment, if Figure 1 As shown, the elastic support member 5 is integrally formed, which improves the strength of the elastic support member 5, makes it less likely to bend and deform, and ensures the stability of supporting the first foil 91 and the second foil 101. The structure is simple and easy to process.

[0053] Preferably, the elastic support member 5 is a rubber member; rubber has good elasticity, insulation and corrosion resistance, and high strength.

[0054] In one embodiment, if Figure 1 As shown, the elastic member 52 is a support column 521, and the cross-sectional area of ​​any one of the first support end 51 and the second support end 53 is larger than the cross-sectional area of ​​the support column 521; the supporting effect of the elastic support member 5 on the first foil 91 and the second foil 101 is improved, and the structure of the elastic support member 5 is simplified, thereby reducing the overall weight of the hard shell button battery.

[0055] Specifically, the support column 521 has a single cross-sectional area, a simple structure, and is easy to process.

[0056] In one embodiment, if Figure 1 As shown, the top surface area of ​​the first support end 51 is smaller than the bottom surface area; the top surface of the first support end 51 can support the first insulating layer 7 at all places;

[0057] The top surface area of ​​the second supporting end 53 is smaller than the bottom surface area thereof; any part of the top surface of the second supporting end 53 can support the second insulating layer 8 .

[0058] Specifically, the top surface of the first support end 51 is circular, elliptical or polygonal, and the bottom surface of the first support end 51 is circular, elliptical or polygonal; the top surface of the second support end 53 is circular, elliptical or polygonal, and the bottom surface of the second support end 53 is circular, elliptical or polygonal.

[0059] In another embodiment, if Figure 3 As shown, the elastic member 52 includes a guide sleeve 522 and an elastic element 523 arranged in the guide sleeve 522, the bottom surface of the first support end 51 is connected to the first end of the elastic element 523, and the bottom surface of the second support end 53 is connected to the second end of the elastic element 523; the guide sleeve 522 can guide the deformation of the elastic element 523, avoid the elastic support member 5 from squeezing the pole core, facilitate the expansion and contraction of the elastic support member 5, and improve the supporting effect on the first foil 91 and the second foil 101.

[0060] Specifically, the first supporting end 51 includes a first supporting portion 511 abutting against the first insulating layer 7, a first limiting portion 513 connected to the first end of the elastic element 523, and a first connecting portion 512 connecting the first supporting portion 511 and the first limiting portion 513; the guide sleeve 522 is slidably connected to the first connecting portion 512, the first limiting portion 513 is slidably disposed in the guide sleeve 522, and the first limiting portion 513 cannot slide out of the guide sleeve 522;

[0061] The second supporting end 53 includes a second supporting portion 531 abutting against the second insulating layer 8, a second limiting portion 533 connected to the second end of the elastic element 523, and a second connecting portion 532 connecting the second supporting portion 531 and the second limiting portion 533; the guide sleeve 522 is slidably connected to the second connecting portion 532, the second limiting portion 533 is slidably arranged in the guide sleeve 522, and the second limiting portion 533 cannot slide out of the guide sleeve 522; the guide sleeve 522 can limit the elastic element 523 to push the first supporting end 51 and the second supporting end 53 to extend outward to the extreme position, so that the elastic element 523 is always kept in a compressed state, ensuring the support for the first foil 91 and the second foil 101.

[0062] In one embodiment, if Figure 1 and 2 As shown, when the pressure in the sealed cavity 6 exceeds a preset value, the upper shell 1 and the lower shell 2 can slide relative to each other; when the hard shell button battery is overcharged, gas will be generated in the sealed cavity 6, resulting in an increase in the pressure in the sealed cavity 6, thereby pushing the upper shell 1 and the lower shell 2 away from each other, effectively alleviating the bloating phenomenon and improving the safety of the hard shell button battery; at the same time, the compressed elastic support member 5 gradually restores its free length as the upper shell 1 and the lower shell 2 move away from each other, thereby always squeezing the first foil 91 and the second foil 101 against the lower shell 2 and the upper shell 1, respectively, to ensure that the lower shell 2 and the first foil 91 are always in contact, and the upper shell 1 and the second foil 101 are always in contact, thereby improving the stability of the electrical connection between the first foil 91 and the lower shell 2 and the second foil 101 and the upper shell 1.

[0063] Specifically, the insulating part 3 is fixedly connected to the upper shell 1, the lower shell 2 is buckled on the open end of the upper shell 1, and the lower shell 2 and the insulating part 3 are interference fit; when the hard shell button battery is overcharged, the pressure in the sealed cavity 6 gradually increases. When the pressure in the sealed cavity 6 is greater than the friction between the lower shell 2 and the insulating part 3, the lower shell 2 is pushed to move outward, thereby alleviating the bloating phenomenon.

[0064] Preferably, if Figure 2 As shown, when the upper shell 1 and the lower shell 2 slide relative to each other to the limit, the elastic support member 5 returns to its free length and no longer presses the first insulating layer 7 and the second insulating layer 8; the pressure of the elastic support member 5 on the first foil 91 and the second foil 101 disappears, the first foil 91 is separated from the lower shell 2, and the second foil 101 is separated from the upper shell 1, thereby forming a short circuit, and then the hard shell button battery stops charging, avoiding the safety hazard caused by overcharging and gas production of the hard shell button battery, avoiding explosion caused by excessive internal pressure of the hard shell button battery, and improving the safety of the hard shell button battery.

[0065] In one embodiment, if Figure 1 and Figure 2As shown, the upper shell 1 is a cylindrical structure with an opening downward, and the opening edge of the upper shell 1 extends outward to form a first annular folded edge 11; thus, the upper shell 1 and the lower shell 2 are extruded face to face during installation, so as to avoid excessive extrusion causing the upper shell 1 to pierce the insulating member 3 and directly contact the lower shell 2 to cause a short circuit;

[0066] The lower shell 2 is a cap-shaped structure, and the edge of the lower shell 2 is bent toward the upper shell 1 to form a second annular fold 21 that wraps around the first annular fold 11 , thereby improving the sealing performance of the connection between the upper shell 1 and the lower shell 2 .

[0067] Specifically, the insulating member 3 wraps the open end of the upper shell 1 ; the end of the second annular folded edge 21 overlaps the insulating member 3 ; and the upper shell 1 and the lower shell 2 are insulated from each other to avoid a short circuit.

[0068] In one embodiment, not shown in the figure, the insulating member 3 is provided with an external thread, the lower shell 2 is provided with an internal thread matching the external thread, and the insulating member 3 is threadedly connected to the lower shell 2; the structure is simple, the connection is stable, the sealing is more reliable, and it is easy to install.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard shell button battery, It is characterized in that It includes an upper shell, a lower shell, an insulating member, a pole core, a first insulating layer, a second insulating layer and an elastic supporting member; The upper shell and the lower shell are insulated and sealed with each other through the insulating member to form a sealed cavity inside the upper shell and the lower shell; the pole core, the first insulating layer, the second insulating layer and the elastic support member are accommodated in the sealed cavity; The pole core comprises a first pole piece, a diaphragm and a second pole piece, the first pole piece and the second pole piece have opposite polarities, the first pole piece leads to a first pole ear, the first pole ear comprises a first foil attached to the inner wall of the lower shell facing the first end face of the pole core; the second pole piece leads to a second pole ear, the second pole ear comprises a second foil attached to the inner wall of the upper shell facing the second end face of the pole core; The first insulating layer is arranged between the first end surface of the pole core and the first foil, the second insulating layer is arranged between the second end surface of the pole core and the second foil, one end of the elastic support member is supported on the first insulating layer to press the first foil against the inner wall of the lower shell, and the other end of the elastic support member is supported on the second insulating layer to press the second foil against the inner wall of the upper shell; The upper shell is a cylindrical structure with an opening downward, and the opening edge of the upper shell extends outward to form a first annular folded edge; the lower shell is a cap-shaped structure, and the edge of the lower shell is bent toward the upper shell to form a second annular folded edge that wraps the first annular folded edge; the lower shell is interference-fitted with the insulating member; When the pressure in the sealed cavity exceeds a preset value, the upper shell and the lower shell can slide relative to each other; When the upper shell and the lower shell slide relative to each other to a limit, the elastic support member recovers to a free length and no longer compresses the first insulating layer and the second insulating layer.

2. The hard shell button battery according to claim 1, It is characterized in that A through hole penetrating the first end surface and the second end surface of the pole core is provided at the axis center of the pole core, and the elastic support member is inserted into the through hole.

3. The hard shell button battery according to claim 2, It is characterized in that The cross-sectional area of ​​any one location of the elastic support member is smaller than the cross-sectional area of ​​the through hole.

4. The hard shell button battery according to claim 2, It is characterized in that The elastic support member comprises an elastic member passing through the through hole, a first support end and a second support end; The top surface of the first supporting end is pressed tightly against the first insulating layer, and the bottom surface of the first supporting end is connected to the first end of the elastic member; The top surface of the second supporting end is pressed tightly against the second insulating layer, and the bottom surface of the second supporting end is connected to the second end of the elastic member.

5. The hard shell button battery according to claim 4, It is characterized in that The elastic supporting member is integrally formed.

6. The hard shell button battery according to claim 4, It is characterized in that The elastic member includes a guide sleeve and an elastic element arranged in the guide sleeve, the bottom surface of the first supporting end is connected to the first end of the elastic element, and the bottom surface of the second supporting end is connected to the second end of the elastic element.

7. The hard shell button battery according to claim 1, It is characterized in that The insulating member is provided with an external thread, the lower shell is provided with an internal thread matched with the external thread, and the insulating member is threadedly connected to the lower shell.

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