Button battery

Abstract

The present invention relates to a button battery, comprising a soft-pack battery cell, a first electrode cover assembly and a second electrode cover assembly, wherein the first electrode cover assembly covers the first end face of the soft-pack battery cell, and the second electrode cover assembly covers the second end face of the soft-pack battery cell; the soft-pack battery cell leads out a first pole ear and a second pole ear with different polarities; the first electrode cover assembly comprises a first insulating cover, a first electrode sheet and a first inner connecting sheet; the first electrode sheet is electrically connected to the first inner connecting sheet; the first pole ear is electrically connected to the first inner connecting sheet; the second electrode cover assembly comprises a second insulating cover, a second electrode sheet and a second inner connecting sheet; the second electrode sheet is electrically connected to the second inner connecting sheet; the second pole ear is electrically connected to the second inner connecting sheet. Compared with the prior art, the button battery of the present invention does not have an additional insulating layer, reduces the increase in the radial size of the button battery, reduces the difficulty of welding, is conducive to the production and assembly of the button battery, is suitable for mass production, improves production efficiency, and reduces production costs.

Description

Technical Field

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

[0002] Button batteries, also known as button batteries, are batteries with an appearance similar to that of a small button. Generally speaking, they have a larger diameter and a thinner thickness. Due to their small size, button batteries are widely used in various microelectronic products. In recent years, with the development of science and technology, button batteries have become more and more integrated into people's lives, and the requirements for button batteries have also become higher and higher.

[0003] The existing hard shell button cell includes an upper cover, a lower cover, an insulating layer and a soft pack battery cell. The upper cover and the lower cover are insulated and connected by the insulating layer, and a cavity for accommodating the soft pack battery cell is formed inside the upper cover and the lower cover. However, the insulating layer is provided between the upper cover and the lower cover, which not only increases the size of the button cell and reduces the energy density of the button cell, but also has a complicated processing technology, low production efficiency and high cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a button battery in view of the problems of low production efficiency and high cost of existing button batteries.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a button battery, comprising a soft-pack battery cell, a first electrode cover assembly and a second electrode cover assembly, wherein the first electrode cover assembly covers a first end surface of the soft-pack battery cell, and the second electrode cover assembly covers a second end surface of the soft-pack battery cell; the soft-pack battery cell leads to a first pole ear and a second pole ear with different polarities;

[0006] The first electrode cover assembly includes a first insulating cover, a first electrode sheet and a first inner connecting sheet; the first electrode sheet is connected to a side of the first insulating cover away from the soft-pack battery cell, and the first inner connecting sheet is connected to a side of the first insulating cover close to the soft-pack battery cell; the first electrode sheet is electrically connected to the first inner connecting sheet; the first electrode tab is electrically connected to the first inner connecting sheet;

[0007] The second electrode cover assembly includes a second insulating cover, a second electrode sheet and a second inner connecting sheet; the second electrode sheet is connected to a side of the second insulating cover away from the soft-pack battery cell, and the second inner connecting sheet is connected to a side of the second insulating cover close to the soft-pack battery cell; the second electrode sheet is electrically connected to the second inner connecting sheet; and the second electrode tab is electrically connected to the second inner connecting sheet.

[0008] Optionally, the first insulating cover is provided with a first through hole penetrating the first insulating cover, a first electrical connector is provided in the first through hole, and the first electrode sheet and the first inner connecting sheet are electrically connected via the first electrical connector;

[0009] The second insulating cover is provided with a second through hole penetrating the second insulating cover, a second electrical connector is provided in the second through hole, and the second electrode sheet and the second inner connecting sheet are electrically connected via the second electrical connector.

[0010] Optionally, the first electrical connection member is a first conductive layer disposed on an inner wall of the first through hole or a first conductive column inserted into the first through hole;

[0011] The second electrical connection member is a second conductive layer disposed on the inner wall of the second through hole or a second conductive column inserted into the second through hole.

[0012] Optionally, a first groove is provided on a side of the first insulating cover away from the soft-pack battery cell, and the first electrode sheet is fixed in the first groove;

[0013] A second groove is provided on a side of the second insulating cover away from the soft-pack battery cell, and the second electrode sheet is fixed in the second groove.

[0014] Optionally, a third groove is provided on a side of the first insulating cover close to the soft-pack battery cell, and the first inner connecting piece is fixed in the third groove;

[0015] A fourth groove is provided on one side of the second insulating cover close to the soft-pack battery core, and the second inner connecting piece is fixed in the fourth groove.

[0016] Optionally, the soft-pack battery cell includes a soft-pack shell and a pole core, the soft-pack shell includes a shell wrapping the pole core and a folded edge sealing the shell; the first pole ear is led out from the pole core and passes through the soft-pack shell from the folded edge, and the second pole ear is led out from the pole core and passes through the soft-pack shell from the folded edge.

[0017] Optionally, the first pole tab is welded to the first inner connecting piece, and a first insulating layer is attached to a portion of the first pole tab other than a welding point where the portion of the first pole tab is exposed from the soft shell;

[0018] The second pole tab is welded to the second inner connecting piece, and a second insulating layer is attached to a portion of the second pole tab other than a welding point of a portion exposed from the soft shell.

[0019] Optionally, a third insulating layer is attached to an end surface of the soft shell facing the first electrode cover assembly.

[0020] Optionally, a fourth insulating layer is attached to an end surface of the soft packaging shell facing the second electrode cover assembly.

[0021] Optionally, a fifth insulating layer is attached to the outer side wall of the folded edge.

[0022] Compared with the prior art, the button battery provided in the embodiment of the present invention has a first insulating cover integrated on the first electrode cover assembly, a first inner connecting sheet electrically connected to the first pole ear is arranged on the inner side of the first insulating cover, and an electrode sheet electrically connected to the first inner connecting sheet is arranged on the outer side of the first insulating cover; the second insulating cover is integrated on the second electrode cover assembly, a second inner connecting sheet electrically connected to the second pole ear is arranged on the inner side of the second insulating cover, and a second electrode sheet electrically connected to the second inner connecting sheet is arranged on the outer side of the second insulating cover; the first electrode cover assembly is arranged on one end face of the soft-pack battery cell, and the second electrode cover assembly is arranged on the other end face of the soft-pack battery cell, and the button battery is more convenient to be electrically connected to other electronic devices through the first electrode sheet and the second electrode sheet. It ensures that the first electrode cover assembly and the second electrode cover assembly are not in contact, enhances the insulation between the positive and negative electrodes of the button battery, and avoids short circuits inside the button battery; it also provides space for the expansion of the overcharged button battery, thereby increasing the safety of the button battery; and the button battery of the present invention does not require an additional insulating layer, thereby avoiding the situation where the insulating layer is punctured and causes a short circuit, reducing the increase in the radial size of the button battery, and improving the energy density of the button battery; at the same time, the welding of the first pole ear and the first inner connecting piece and the second pole ear and the second inner connecting piece is more convenient, reducing the welding difficulty, improving the welding quality, facilitating the production and assembly of the button battery, being suitable for mass production, improving the production efficiency, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a button battery provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 AA section view;

[0025] Figure 3 yes Figure 1 Schematic diagram of the explosion structure.

[0026] The reference numerals in the specification are as follows:

[0027] 1. Soft-pack battery cell; 11. First pole ear; 12. Second pole ear; 13. Shell; 14. Folding edge;

[0028] 2. First electrode cover assembly; 21. First insulation cover; 211. First through hole; 212. First groove; 22. First electrode sheet; 23. First inner connecting sheet;

[0029] 3. Second electrode cover assembly; 31. Second insulating cover; 311. Second through hole; 312. Fourth groove; 32. Second electrode sheet; 33. Second inner connecting sheet;

[0030] 4. First insulating layer; 5. Second insulating layer; 6. Third insulating layer; 7. Fourth insulating layer;

[0031] 8. Fifth insulating layer. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figures 1 to 3 As shown, the button battery provided by the embodiment of the present invention comprises a soft-pack battery cell 1, a first electrode cover assembly 2 and a second electrode cover assembly 3, wherein the first electrode cover assembly 2 covers the first end surface of the soft-pack battery cell 1, and the second electrode cover assembly 3 covers the second end surface of the soft-pack battery cell 1; the soft-pack battery cell 1 leads to a first pole ear 11 and a second pole ear 12 with different polarities;

[0034] The first electrode cover assembly 2 includes a first insulating cover 21, a first electrode sheet 22 and a first inner connecting sheet 23; the first electrode sheet 22 is connected to a side of the first insulating cover 21 away from the soft-pack battery cell 1, and the first inner connecting sheet 23 is connected to a side of the first insulating cover 21 close to the soft-pack battery cell 1; the first electrode sheet 22 is electrically connected to the first inner connecting sheet 23; the first electrode tab 11 is electrically connected to the first inner connecting sheet 23;

[0035] The second electrode cover assembly 3 includes a second insulating cover 31, a second electrode sheet 32 ​​and a second inner connecting sheet 33; the second electrode sheet 32 ​​is connected to the side of the second insulating cover 31 away from the soft-pack battery cell 1, and the second inner connecting sheet 33 is connected to the side of the second insulating cover 31 close to the soft-pack battery cell 1; the second electrode sheet 32 ​​is electrically connected to the second inner connecting sheet 33; the second pole tab 12 is electrically connected to the second inner connecting sheet 33.

[0036] In the button battery provided in the embodiment of the present invention, compared with the prior art, the first insulating cover 21 is integrated on the first electrode cover assembly 2, a first inner connecting piece 23 is arranged on the inner side of the first insulating cover 21 to be electrically connected to the first pole ear 11, and an electrode sheet electrically connected to the first inner connecting piece 23 is arranged on the outer side of the first insulating cover 21; the second insulating cover 31 is integrated on the second electrode cover assembly 3, a second inner connecting piece 33 is arranged on the inner side of the second insulating cover 31 to be electrically connected to the second pole ear 12, and a second electrode sheet 32 ​​electrically connected to the second inner connecting piece 33 is arranged on the outer side of the second insulating cover 31; the first electrode cover assembly 2 is arranged on one end face of the soft-pack battery cell 1, and the second electrode cover assembly 3 is arranged on the other end face of the soft-pack battery cell 1, and the button battery is more It is convenient to electrically connect with other electronic devices, ensures that the first electrode cover assembly 2 and the second electrode cover assembly 3 are not in contact, enhances the insulation between the positive and negative electrodes of the button battery, and avoids short circuits inside the button battery; it also provides space for the expansion of overcharged button batteries, thereby increasing the safety of the button batteries; and the button battery of the present invention does not require an additional insulating layer, thereby avoiding the situation where the insulating layer is punctured and causes a short circuit, reducing the increase in the radial size of the button battery, and improving the energy density of the button battery; at the same time, the welding of the first pole ear 11 with the first inner connecting piece 23 and the second pole ear 12 with the second inner connecting piece 33 is more convenient, reducing the welding difficulty, improving the welding quality, facilitating the production and assembly of button batteries, being suitable for mass production, improving production efficiency, and reducing production costs.

[0037] Specifically, the first insulating cover 21 is bonded to the first end surface of the soft-pack battery cell 1 , and the second insulating cover 31 is bonded to the second end surface of the soft-pack battery cell 1 ; the connection is stable, the structure is simple, and the installation is convenient.

[0038] In one embodiment, the first electrode cover assembly is configured as a PCB board, the first insulating cover is a substrate of the PCB board, an inner copper foil layer is provided on a side of the substrate close to the soft-pack battery cell, and an outer copper foil layer is provided on a side of the substrate away from the soft-pack battery cell; a first inner connecting sheet is etched on the inner copper foil layer, and a first electrode sheet is etched on the outer copper foil layer; the first electrode sheet and the first inner connecting sheet are connected by vias; the PCB board can be used in various complex circuit connections, expand the application range of button batteries, and better electrically connect various electronic devices.

[0039] Specifically, an internal circuit is etched on the internal copper foil layer, and a protection circuit is provided on the internal circuit; circuit protection elements such as a positive temperature coefficient thermistor are connected to the internal circuit, which can better protect the button battery, improve the safety of the button battery, and extend the service life of the button battery.

[0040] Specifically, an external circuit is etched on the external copper foil layer; the substrate can be installed with various electronic components, thereby expanding the application scope of the button battery.

[0041] In one embodiment, if Figure 2 and Figure 3 As shown, the first insulating cover 21 is provided with a first through hole 211 penetrating through the first insulating cover 21, and a first electrical connector is provided in the first through hole 211. The first electrode sheet 22 and the first inner connecting sheet 23 are electrically connected via the first electrical connector, thereby facilitating the electrical connection between the first electrode sheet 22 and the first inner connecting sheet 23 and avoiding interference with other structures that may cause a short circuit.

[0042] Specifically, the first electrical connection member is a first conductive layer disposed on the inner wall of the first through hole 211 ; it has a simple structure and is easy to process and install.

[0043] Specifically, the first electrical connector is a first conductive column inserted into the first through hole 211; it has a simple structure and a stable electrical connection effect.

[0044] In one embodiment, if Figure 2 As shown, the center lines of the first electrode sheet 22, the first insulating cover 21 and the first inner connecting sheet 23 are located on the same axis; the first through hole 211 is located at the center of the first insulating cover 21; the first electrode sheet 22 and the first inner connecting sheet 23 are prevented from being located at the edge of the first insulating cover 21 and thus contacting other electronic components to cause a short circuit, thereby improving the safety of the button battery.

[0045] In one embodiment, if Figure 2 and Figure 3 As shown, a first groove 212 is provided on the side of the first insulating cover 21 away from the soft-pack battery cell 1, and the first electrode sheet 22 is fixed in the first groove 212; the stability of the connection between the first electrode sheet 22 and the first insulating cover 21 is increased, the compactness of the overall structure of the button battery is improved, and the size of the button battery is avoided from being increased too much. The structure is simple and easy to install.

[0046] Specifically, the first electrode sheet 22 can be fixed on the first insulating cover 21 by injection molding or pasting.

[0047] Preferably, the thickness of the first electrode sheet 22 is not less than the depth of the first groove 212 , which facilitates the installation of the first electrode sheet 22 in the first groove 212 and the connection of the first electrode sheet 22 with other electronic components.

[0048] In one embodiment, if Figure 2 As shown, a third groove is provided on one side of the first insulating cover 21 close to the soft-pack battery cell 1, and the first inner connecting piece 23 is fixed in the third groove; the stability of the connection between the first inner connecting piece 23 and the first insulating cover 21 is increased, the compactness of the overall structure of the button battery is improved, and the size of the button battery is avoided from being increased too much. The structure is simple and easy to install.

[0049] Specifically, the first inner connecting piece 23 can be fixed on the first insulating cover 21 by injection molding or patching.

[0050] Preferably, the thickness of the first inner connecting piece 23 is not less than the depth of the third groove, so that the first inner connecting piece 23 can be easily installed in the third groove and the first inner connecting piece 23 can be more easily connected to the first electrode tab 11 .

[0051] In one embodiment, the second electrode cover assembly is configured as a PCB board, the second insulating cover is a substrate of the PCB board, an internal copper foil layer is provided on a side of the substrate close to the soft-pack battery cell, and an external copper foil layer is provided on a side of the substrate away from the soft-pack battery cell; a second inner connecting sheet is etched on the internal copper foil layer, and a second electrode sheet is etched on the external copper foil layer; the second electrode sheet and the second inner connecting sheet are connected by vias; the PCB board can be used in various complex circuit connections, expand the scope of application of button batteries, and better electrically connect various electronic devices.

[0052] Specifically, an internal circuit is etched on the internal copper foil layer, and a protection circuit is provided on the internal circuit; circuit protection elements such as a positive temperature coefficient thermistor are connected to the internal circuit, which can better protect the button battery, improve the safety of the button battery, and extend the service life of the button battery.

[0053] Specifically, an external circuit is etched on the external copper foil layer; the substrate can be installed with various electronic components, thereby expanding the application scope of the button battery.

[0054] In one embodiment, if Figure 2 and Figure 3 As shown, the second insulating cover 31 is provided with a second through hole 311 penetrating through the second insulating cover 31, and a second electrical connector is provided in the second through hole 311. The second electrode sheet 32 ​​and the second inner connecting sheet 33 are electrically connected through the second electrical connector, which facilitates the electrical connection between the second electrode sheet 32 ​​and the second inner connecting sheet 33 and avoids interference with other structures that may cause a short circuit.

[0055] Specifically, the second electrical connection member is a second conductive layer disposed on the inner wall of the second through hole 311 ; it has a simple structure and is easy to process and install.

[0056] Specifically, the second electrical connection member is a second conductive column inserted into the second through hole 311; it has a simple structure and a stable electrical connection effect.

[0057] In one embodiment, if Figure 2 As shown, the center lines of the second electrode sheet 32, the second insulating cover 31 and the second inner connecting sheet 33 are located on the same axis; the second through hole 311 is located at the center of the second insulating cover 31; the second electrode sheet 32 ​​and the second inner connecting sheet 33 are prevented from being located at the edge of the second insulating cover 31 and contacting other electronic components to cause a short circuit, thereby improving the safety of the button battery.

[0058] In one embodiment, if Figure 2 As shown, a second groove is provided on the side of the second insulating cover 31 away from the soft-pack battery cell 1, and the second electrode sheet 32 ​​is fixed in the second groove; the stability of the connection between the second electrode sheet 32 ​​and the second insulating cover 31 is increased, the compactness of the overall structure of the button battery is improved, and the size of the button battery is avoided from being increased too much. The structure is simple and easy to install.

[0059] Specifically, the second electrode sheet 32 ​​can be fixed on the second insulating cover 31 by injection molding or patching.

[0060] Preferably, the thickness of the second electrode sheet 32 ​​is not less than the depth of the second groove, so that the second electrode sheet 32 ​​can be easily installed in the second groove and connected with other electronic components.

[0061] In one embodiment, if Figure 2 and Figure 3 As shown, a fourth groove 312 is provided on one side of the second insulating cover 31 close to the soft-pack battery cell 1, and the second inner connecting piece 33 is fixed in the fourth groove 312; the stability of the connection between the second inner connecting piece 33 and the second insulating cover 31 is increased, the compactness of the overall structure of the button battery is improved, and the size of the button battery is avoided from being increased too much. The structure is simple and easy to install.

[0062] Specifically, the second inner connecting piece 33 can be fixed on the second insulating cover 31 by injection molding or patching.

[0063] Preferably, the thickness of the second inner connecting piece 33 is not less than the depth of the fourth groove 312 , so that the second inner connecting piece 33 can be installed in the fourth groove 312 and the second inner connecting piece 33 can be connected to the second pole tab 12 more conveniently.

[0064] In one embodiment, if Figure 3 As shown, the soft-pack battery cell 1 includes a soft-pack shell and a pole core, the soft-pack shell includes a shell 13 wrapping the pole core and a folded edge 14 sealing the shell 13; the first pole ear 11 is led out from the pole core and passes through the soft-pack shell from the folded edge 14, and the second pole ear 12 is led out from the pole core and passes through the soft-pack shell from the folded edge 14.

[0065] Specifically, the lead-out positions of the first pole lug 11 and the second pole lug 12 differ by 180 degrees on the circumference; increasing the distance between the first pole lug 11 and the second pole lug 12 facilitates the lead-out of the first pole lug 11 and the second pole lug 12 and avoids interference between the first pole lug 11 and the second pole lug 12.

[0066] In one embodiment, the soft-pack battery cell 1 also includes a support member encapsulated in the soft-pack shell, the pole core is a wound pole core, a through hole penetrating the two end faces of the pole core is provided at the axis of the pole core, and the support member is inserted in the through hole; the support member is used to play an internal support role when the two end faces of the button battery are squeezed, and the squeezing force acts on the support member through the soft-pack shell, thereby avoiding the two end faces of the pole core from being directly collided and squeezed, thereby causing an internal short circuit in the button battery, and can better protect the pole core.

[0067] In one embodiment, if Figure 2 and Figure 3 As shown, the first pole tab 11 is welded to the first inner connecting piece 23, and the first insulating layer 4 is attached to the portion of the first pole tab 11 exposed from the soft shell except the welding point; the first insulating layer 4 provides insulation protection for the first pole tab 11 to prevent short circuit inside the button battery.

[0068] In one embodiment, if Figure 2 and Figure 3 As shown, the second pole tab 12 is welded to the second inner connecting piece 33, and the second insulating layer 5 is attached to the portion of the second pole tab 12 exposed from the soft shell except the welding point; the second insulating layer 5 provides insulation protection for the second pole tab 12 to prevent short circuit inside the button battery.

[0069] In one embodiment, if Figure 2 and Figure 3 As shown, a third insulating layer 6 is attached to the end surface of the soft-pack shell facing the first electrode cover assembly 2, which prevents the welding points of the first pole ear 11 and the first inner connecting piece 23 from piercing the soft-pack shell and causing an internal short circuit in the button battery, thereby enhancing the insulation between the positive and negative electrodes of the button battery, better protecting the soft-pack battery cell, and improving the safety of the button battery.

[0070] In one embodiment, if Figure 2 and Figure 3 As shown, a fourth insulating layer 7 is attached to one end surface of the soft-pack shell facing the second electrode cover assembly 3, which prevents the welding points of the second pole ear 12 and the second inner connecting piece 33 from piercing the soft-pack shell and causing an internal short circuit in the button battery, thereby enhancing the insulation between the positive and negative electrodes of the button battery, better protecting the soft-pack battery cell, and improving the safety of the button battery.

[0071] In one embodiment, if Figure 2 and Figure 3 As shown, a fifth insulating layer 8 is attached to the outer side wall of the folded edge 14, which further plays the role of insulating protection and prevents the button battery from short circuiting.

[0072] 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 button battery, characterized in that: It comprises a soft-pack battery cell, a first electrode cover assembly and a second electrode cover assembly, wherein the first electrode cover assembly covers a first end surface of the soft-pack battery cell, and the second electrode cover assembly covers a second end surface of the soft-pack battery cell; the soft-pack battery cell leads to a first pole ear and a second pole ear with different polarities; The first electrode cover assembly includes a first insulating cover, a first electrode sheet and a first inner connecting sheet; the first electrode sheet is connected to a side of the first insulating cover away from the soft-pack battery cell, and the first inner connecting sheet is connected to a side of the first insulating cover close to the soft-pack battery cell; the first electrode sheet is electrically connected to the first inner connecting sheet; the first electrode tab is electrically connected to the first inner connecting sheet; The second electrode cover assembly includes a second insulating cover, a second electrode sheet, and a second inner connecting sheet; the second electrode sheet is connected to a side of the second insulating cover away from the soft-pack battery cell, and the second inner connecting sheet is connected to a side of the second insulating cover close to the soft-pack battery cell; the second electrode sheet is electrically connected to the second inner connecting sheet; and the second electrode tab is electrically connected to the second inner connecting sheet; The first electrode cover assembly and the second electrode cover assembly are not in contact; The first insulating cover is bonded to the first end surface of the soft-pack battery cell, and the second insulating cover is bonded to the second end surface of the soft-pack battery cell.

2. The button battery according to claim 1, characterized in that: The first insulating cover is provided with a first through hole penetrating through the first insulating cover, a first electrical connector is provided in the first through hole, and the first electrode sheet and the first inner connecting sheet are electrically connected through the first electrical connector; The second insulating cover is provided with a second through hole penetrating the second insulating cover, a second electrical connector is provided in the second through hole, and the second electrode sheet and the second inner connecting sheet are electrically connected via the second electrical connector.

3. The button battery according to claim 2, characterized in that: The first electrical connection member is a first conductive layer disposed on the inner wall of the first through hole or a first conductive column inserted into the first through hole; The second electrical connection member is a second conductive layer disposed on the inner wall of the second through hole or a second conductive column inserted into the second through hole.

4. The button battery according to claim 1, characterized in that: A first groove is provided on a side of the first insulating cover away from the soft-pack battery cell, and the first electrode sheet is fixed in the first groove; A second groove is provided on a side of the second insulating cover away from the soft-pack battery cell, and the second electrode sheet is fixed in the second groove.

5. The button battery according to claim 1, characterized in that: A third groove is provided on one side of the first insulating cover close to the soft-pack battery cell, and the first inner connecting piece is fixed in the third groove; A fourth groove is provided on one side of the second insulating cover close to the soft-pack battery core, and the second inner connecting piece is fixed in the fourth groove.

6. The button battery according to claim 1, characterized in that: The soft-pack battery cell includes a soft-pack shell and a pole core, wherein the soft-pack shell includes a shell that wraps the pole core and a folded edge that seals the shell; the first pole ear is led out from the pole core and passes through the soft-pack shell from the folded edge, and the second pole ear is led out from the pole core and passes through the soft-pack shell from the folded edge.

7. The button battery according to claim 6, characterized in that: The first pole tab is welded to the first inner connecting piece, and a first insulating layer is attached to a portion of the first pole tab other than a welding point where the portion of the first pole tab is exposed from the soft shell; The second pole tab is welded to the second inner connecting piece, and a second insulating layer is attached to a portion of the second pole tab other than a welding point of a portion exposed from the soft shell.

8. The button battery according to claim 7, characterized in that: A third insulating layer is attached to an end surface of the soft package shell facing the first electrode cover assembly.

9. The button battery according to claim 7, characterized in that: A fourth insulating layer is attached to an end surface of the soft package shell facing the second electrode cover assembly.

10. The button battery according to claim 6, characterized in that: A fifth insulating layer is attached to the outer side wall of the folded edge.

Images