阅读说明：本技术 纽扣电池组件和电子设备 (Button cell subassembly and electronic equipment ) 是由 张丰学 夏祖见 黄亦农 于 2021-08-06 设计创作，主要内容包括：本发明公开一种纽扣电池组件和电子设备,由于盖壳的绝缘粘接中层是胶层结构,如果用电设备的电极线直接焊接于盖壳,焊接过程的高温会破坏绝缘粘接中层,导致无法有效绝缘或粘接,因此,通过设置导线连接座,可减少纽扣电池应用时的损坏,以减少报废率；此外,第二金属弹性结构还能对焊接外层施加向内的盖壳压力F2,由于该盖壳压力F2大于第一金属弹性结构对内导电部施加的导电压力F1,因此,盖壳压力F2会使焊接外层夹固绝缘粘接中层,避免纽扣电池内部产生的气体将绝缘粘接中层与焊接外层或导电内层的粘接处冲开,从而可有效提高纽扣电池的结构稳定性,进一步延长纽扣电池的使用寿命。(The invention discloses a button cell assembly and electronic equipment, wherein an insulating bonding middle layer of a cover shell is of a glue layer structure, if an electrode wire of electric equipment is directly welded on the cover shell, the insulating bonding middle layer can be damaged by high temperature in the welding process, so that effective insulation or bonding cannot be realized, and therefore, by arranging a lead connecting seat, the damage of the button cell during application can be reduced, and the rejection rate is reduced; in addition, the second metal elastic structure can also exert inward cover shell pressure F2 to the welding outer layer, because this cover shell pressure F2 is greater than the electrically conductive pressure F1 that the first metal elastic structure applyed to the internal conductive part, consequently, cover shell pressure F2 can make welding outer layer clamping insulating bonding middle level, avoid the inside gas that produces of button cell to dash the bonding department of insulating bonding middle level and welding outer layer or electrically conductive inlayer to open, thereby can effectively improve button cell's structural stability, further prolong button cell's life.)

1. A button cell assembly is characterized by comprising a lead connecting seat and a button cell;

the lead connecting seat comprises an external connecting plate and a fixed bottom plate;

the button battery comprises a battery cell, a metal shell and a cover shell connected with the metal shell in a sealing manner;

the cover shell comprises a welding outer layer, an insulating bonding middle layer and a conductive inner layer, the welding outer layer comprises an outer welding side part, an outer bonding middle part and an outer through hole part, the insulating bonding middle layer comprises a middle insulating bonding part and a middle through hole part, the conductive inner layer comprises an inner bonding part and an inner conductive part, the outer welding side part is welded with the opening end of the metal shell, the inner conductive part is exposed out of the middle through hole part through the outer through hole part, the middle insulating bonding part is seamlessly bonded with the outer bonding middle part and the inner bonding part after an insulating electrolyte corrosion-resistant material with the heat shrinkage rate of less than 6% at 100 ℃ is melted, and the bonding strength between the middle part and the inner bonding part is more than or equal to 0.1N per square millimeter at normal temperature;

one pole of the battery cell is electrically communicated with the welding outer layer, and the other pole of the battery cell is electrically communicated with the conductive inner layer;

the external connection plate comprises an insulation body, a first metal elastic structure arranged in the middle of the insulation body, a second metal elastic structure arranged on the periphery of the insulation body, a first electrode metal connection area and a second electrode metal connection area;

the insulating body is provided with a conducting surface and an outer connecting surface which are arranged in an opposite way, the conducting surface is provided with the first metal elastic structure and is used for electrically contacting the inner conducting part when elastic change occurs, and the outer connecting surface is provided with the first electrode metal connecting area and the second electrode metal connecting area;

the first electrode metal connection region is in electrical communication with the first metal spring structure;

the second electrode metal connecting region is electrically communicated with the second metal elastic structure;

the fixed bottom plate comprises a bottom shell main body and a supporting plate arranged at the edge of the bottom shell main body;

the external joint surface is also provided with a connecting structure;

the supporting plate is fixedly connected to the connecting structure, so that an installation space is formed among the bottom shell main body, the supporting plate and the insulating body, and the button battery is accommodated in the installation space;

the second metal elastic structure is elastically deformed under the action of the fixed bottom plate to generate cover shell pressure F2 on the welding outer layer, and the cover shell pressure F2 is greater than or equal to the conductive pressure F1 of the first metal elastic structure on the inner conductive part.

2. The button cell assembly as defined in claim 1, wherein a third resilient structure is provided on the bottom case body.

3. The button cell assembly according to claim 2, wherein the third resilient structure is a metal dome.

4. The button cell assembly according to claim 1, wherein the first electrode metal connection region and the second electrode metal connection region are made of copper, nickel, tin, or an alloy of these elements.

5. The button cell assembly as set forth in claim 1, wherein the insulating adhesive middle layer is made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC.

6. The button cell assembly as defined in claim 1, wherein said button cell is a secondary rechargeable cell.

7. A button cell assembly according to any one of claims 1 to 6 wherein the bond strength between the middle insulating bond and the outer and inner bond middle portions is greater than or equal to 1N per square millimeter and less than or equal to 5N per square millimeter.

8. Button cell assembly according to one of the claims 1 to 6, wherein the second metal spring structure is provided as an annular metal spring.

9. A button cell assembly according to any one of claims 1 to 5 wherein the second metal spring structure is in contact with the outer weld layer at a location on the middle layer of the insulating adhesive layer corresponding to the side of the outer weld layer.

10. An electronic device comprising an electronic device body including an electric device, and a button cell assembly according to any one of claims 1 to 9, the button cell assembly being located in the electronic device body, and one of poles of the electric device being electrically communicated with the first electrode metal connection region; the other electrode is electrically connected to the second electrode metal connection region.

Technical Field

The invention relates to the technical field of batteries, in particular to a button battery assembly and electronic equipment.

Background

In addition, the portable electronic devices are increasingly more complex and light, and therefore have higher endurance requirements. Especially, in recent years, a wearable 3C consumer electronics market has scraped a lot of sales cyclones (such as TWS earphones), and has become an indispensable electronic product in modern life.

In the related art, the button cell is usually welded to an electrode line of the power utilization circuit in an application scenario to keep the button cell and the power utilization circuit connected. Currently, manufacturers have used the circuit to connect the button cell by welding (such as spot welding, impedance welding, ultrasonic welding, laser spot welding, and electric welding of conduction medium value welding type). And button cell's shell is made by stainless steel material, and the welded fastening degree of difficulty of stainless steel material and electrode line is great, leads to welding efficiency lower, has reduced button cell and consumer's installation effectiveness, simultaneously, in welding process, leads to button cell's shell to damage easily, and then reduces button cell's life, leads to button cell to scrap even.

Disclosure of Invention

The invention mainly aims to provide a button cell assembly, and aims to solve the technical problem of how to reduce damage of a button cell when the button cell is installed on electric equipment.

In order to achieve the purpose, the button cell assembly provided by the invention comprises a lead connecting seat and a button cell;

the lead connecting seat comprises an external connecting plate and a fixed bottom plate;

the button battery comprises a battery cell, a metal shell and a cover shell connected with the metal shell in a sealing manner;

the cover shell comprises a welding outer layer, an insulating bonding middle layer and a conductive inner layer, the welding outer layer comprises an outer welding side part, an outer bonding middle part and an outer through hole part, the insulating bonding middle layer comprises a middle insulating bonding part and a middle through hole part, the conductive inner layer comprises an inner bonding part and an inner conductive part, the outer welding side part is welded with the opening end of the metal shell, the inner conductive part is exposed out of the middle through hole part through the outer through hole part, the middle insulating bonding part is seamlessly bonded with the outer bonding middle part and the inner bonding part after an insulating electrolyte corrosion-resistant material with the heat shrinkage rate of less than 6% at 100 ℃ is melted, and the bonding strength between the middle part and the inner bonding part is more than or equal to 0.1N per square millimeter at normal temperature;

one pole of the battery cell is electrically communicated with the welding outer layer, and the other pole of the battery cell is electrically communicated with the conductive inner layer;

the external connection plate comprises an insulation body, a first metal elastic structure arranged in the middle of the insulation body, a second metal elastic structure arranged on the periphery of the insulation body, a first electrode metal connection area and a second electrode metal connection area;

the insulating body is provided with a conducting surface and an outer connecting surface which are arranged in an opposite way, the conducting surface is provided with the first metal elastic structure and is used for electrically contacting the inner conducting part when elastic change occurs, and the outer connecting surface is provided with the first electrode metal connecting area and the second electrode metal connecting area;

the first electrode metal connection region is in electrical communication with the first metal spring structure;

the second electrode metal connecting region is electrically communicated with the second metal elastic structure;

the fixed bottom plate comprises a bottom shell main body and a supporting plate arranged at the edge of the bottom shell main body;

the external joint surface is also provided with a connecting structure;

the supporting plate is fixedly connected to the connecting structure, so that an installation space is formed among the bottom shell main body, the supporting plate and the insulating body, and the button battery is accommodated in the installation space;

the second metal elastic structure is elastically deformed under the action of the fixed bottom plate to generate cover shell pressure F2 on the welding outer layer, and the cover shell pressure F2 is greater than or equal to the conductive pressure F1 of the first metal elastic structure on the inner conductive part.

Optionally, a third elastic structure is disposed on the bottom case main body.

Optionally, the third elastic structure is a metal elastic sheet.

Optionally, the first electrode metal connection region and the second electrode metal connection region are made of copper, nickel, tin or an alloy of these elements.

Optionally, the material of the insulating bonding middle layer is one or more of PP, PFA, PVDF, PTFE, ETFE, and PVC.

Optionally, the button cell is a secondary rechargeable battery.

Optionally, the bonding strength between the middle insulating bonding part and the outer bonding middle part and between the middle insulating bonding part and the inner bonding part is greater than or equal to 1N per square millimeter and less than or equal to 5N per square millimeter.

Optionally, the second metal elastic structure is provided as an annular metal spring.

Optionally, the contact position of the second metal elastic structure and the welding outer layer is located at a position corresponding to the side of the bonding position of the insulating bonding middle layer and the welding outer layer.

The invention also provides electronic equipment, which comprises an electronic equipment main body containing an electric device and the button battery assembly, wherein the button battery assembly is positioned in the electronic equipment main body, and one pole of the electric device is electrically communicated with the first electrode metal connecting area; the other electrode is electrically connected to the second electrode metal connection region.

The cover shell of the button battery is divided into a welding outer layer, an insulating bonding middle layer and a conductive inner layer, wherein the welding outer layer is electrically communicated with one pole of the battery cell, the conductive inner layer is electrically communicated with the other pole of the battery cell, and the battery cell can be packaged after the outer welding side part of the welding outer layer is welded with the opening end of the metal shell.

Because the conductive inner layer and the welding outer layer are insulated by the insulating bonding middle layer, the metal shell is also insulated with the conductive inner layer, so that the mutual conduction and short circuit of two electrodes of the battery cell can be prevented; because the conductive inner layer and the welding outer layer of the cover shell are insulated in advance, when the cover shell is used for packaging the metal shell, only the welding outer layer and the metal shell need to be welded without arranging an insulating film, so that the packaging process of the battery can be simplified, and the packaging efficiency is improved.

The insulating body and the PMKD of wire connecting seat enclose to close and form installation space to accomodate installation button cell, after button cell packed into installation space, the welding skin switched on with second metal elastic structure butt, electrically conductive inlayer and first metal elastic structure butt, thereby made the first electrode metal joining region of outer joint face switch on with button cell's an electrode, second electrode metal joining region switches on with button cell's another electrode.

First electrode metal joining region, second electrode metal joining region are used for supplying the welding of electric equipment's positive and negative electrode line or butt contact, and the electrode line of electric equipment can switch on with button cell's electrode after welding with first electrode metal joining region, second electrode metal joining region to realize electric equipment and button cell's electric conductance.

Because the insulating bonding middle layer of the cover shell is of a glue layer structure, if the electrode wire of the electric equipment is directly welded on the cover shell, the insulating bonding middle layer can be damaged by high temperature in the welding process, so that effective insulation or bonding cannot be realized, and therefore, the damage of the button cell in application can be reduced by arranging the lead connecting seat, and the rejection rate is reduced; in addition, the second metal elastic structure can also exert inward cover shell pressure F2 to the welding outer layer, because this cover shell pressure F2 is greater than the electrically conductive pressure F1 that the first metal elastic structure applyed to the internal conductive part, consequently, cover shell pressure F2 can make welding outer layer clamping insulating bonding middle level, avoid the inside gas that produces of button cell to dash the bonding department of insulating bonding middle level and welding outer layer or electrically conductive inlayer to open, thereby can effectively improve button cell's structural stability, further prolong button cell's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a button cell assembly according to an embodiment of the present invention;

FIG. 2 is a disassembled schematic view of one embodiment of a button cell assembly according to the present invention;

FIG. 3 is a disassembled sectional view of one embodiment of the wire connecting seat of the present invention;

FIG. 4 is a schematic structural view of an embodiment of a button cell of the present invention;

fig. 5 is a schematic cross-sectional view of an embodiment of a button cell of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a button battery assembly which is used for being installed in an electronic equipment main body containing an electric appliance to supply electric energy to the electric appliance.

In the embodiment of the invention, as shown in fig. 1 to 5, the button cell assembly includes a lead connecting seat 10 and a button cell 20;

the lead connecting seat 10 comprises an external connecting plate 11 and a fixed bottom plate 12;

the button battery 20 comprises a battery cell 21, a metal shell 22 and a cover shell 23 hermetically connected with the metal shell 22;

the cover shell 23 comprises a welding outer layer 24, an insulating adhesive middle layer 25 and a conductive inner layer 26, the welded outer layer 24 includes outer welding side portions 241, outer adhesive middle portions 242 and outer through hole portions 243, the insulating adhesive middle layer 25 includes a middle insulating adhesive portion 251 and a middle through hole portion 252, the conductive inner layer 26 includes an inner adhesive portion 261 and an inner conductive portion 262, the outer welding side portion 241 is welded to the open end of the metal case 22, the inner conductive portion 262 is exposed through the outer through hole portion 243 and the middle through hole portion 252, the middle insulating bonding part 251 is made of a material which is insulated and can prevent the corrosion of electrolyte and has a thermal shrinkage rate of less than 6% at the temperature of more than or equal to 100 ℃, the outer bonding middle part 242 and the inner bonding part 261 are bonded in a seamless mode, and the bonding strength between the outer bonding middle part 242 and the inner bonding part 261 is larger than or equal to 0.1N per square millimeter at a cooling normal temperature;

one pole of the cell 21 is electrically connected to the welding outer layer 24, and the other pole of the cell 21 is electrically connected to the conductive inner layer 26;

the external connection plate 11 comprises an insulation body 13, a first metal elastic structure 14 arranged in the middle of the insulation body, a second metal elastic structure 15 arranged on the periphery of the insulation body 13, a first electrode metal connection area 16 and a second electrode metal connection area 17;

the insulating body 13 has a conducting surface 131 and an external connecting surface 132 which are opposite to each other, the conducting surface 131 is provided with the first metal elastic structure 14 for electrically contacting the internal conducting portion 262 when an elastic change occurs, and the external connecting surface 132 is provided with the first electrode metal connecting region 16 and the second electrode metal connecting region 17;

said first electrode metal connection region 16 is in electrical communication with said first metal spring structure 14;

said second electrode metal connection region 17 is in electrical communication with said second metal spring structure 15;

the fixed bottom plate 12 comprises a bottom shell body 121 and a supporting plate 122 arranged at the edge of the bottom shell body 121;

the outer joint surface 132 is further provided with a connecting structure 133;

the supporting plate 122 is fixedly connected to the connecting structure 133, so that an installation space is formed among the bottom case main body 121, the supporting plate 122 and the insulating body 13, and the installation space receives the button battery 20;

the second metal elastic structure 15 is elastically deformed under the action of the fixed bottom plate 12 to generate a cover shell 23 pressure F2 on the welding outer layer 24, and the cover shell 23 pressure F2 is greater than or equal to a conductive pressure F1 of the first metal elastic structure 14 on the inner conductive portion 262.

The metal casing 22 may be made of stainless steel plate, and the opening of the metal casing 22 faces upward to accommodate the battery cell 21 and the electrolyte.

The welding outer layer 24 and the conductive inner layer 26 of the cover case 23 may be made of stainless steel plates, wherein the inner conductive portion 262 of the conductive inner layer 26 faces the battery case for connecting with one of the electrodes of the battery core 21; the welding outer layer 24 is connected to the other electrode of the battery cell 21 by being connected to the metal casing 22. Because the insulating bonding middle layer 25 is arranged between the welding outer layer 24 and the conductive inner layer 26, the welding outer layer 24 and the conductive inner layer 26 are insulated from each other, so that the metal shell 22 and the cover shell 23 can be insulated from each other, and the two electrodes of the battery cell 21 are prevented from being conducted with each other, so that the conductive inner layer 26 and the welding outer layer 24 of the cover shell 23 can form two output electrodes of the button battery 20 respectively, and the two output electrodes can be prevented from being conducted with each other to cause short circuit.

It is understood that the inner conductive portion 262 faces the outside of the cover case 23 through the middle through hole portion 252 and the outer through hole portion 243 for electrical connection of an external device. The inner conductive portion 262 may be located at the bottom of the middle through hole portion 252 and the outer through hole portion 243, or may protrude toward the outside of the metal shell 22 and sequentially pass through the middle through hole portion 252 and the outer through hole portion 243, which is not limited herein, and it is only required that the inner conductive portion 262 is exposed out of the cover 23.

In the prior art, a shell of a button battery 20 is matched with an upper shell and a lower shell, a plastic insulating ring is arranged in the middle of the shell, and the side wall of the battery shell has a three-layer structure; the side wall of the metal shell 22 of the present application can be only one layer, and under the condition of the shells with the same size, the metal shell 22 of the present application increases the available space inside, which is beneficial to increasing the capacity of the whole battery.

The outer welding side portion 241, i.e., the welding outer layer 24, is a position for welding with the metal shell 22, and the outer welding side portion 241 is provided on the peripheral wall of the welding outer layer 24. The outer through hole portions 243 are locations where the outer welding layer 24 is perforated, and the outer adhesive intermediate portions 242 are used for adhesion with the insulating adhesive intermediate layer 25. The outer welding side portion 241 is welded to the metal shell 22, so that the cover 23 and the metal shell 22 can be fixed to each other, and the welding outer layer 24 and the metal shell 22 can be electrically connected to each other. The middle through-hole portion 252 of the insulating adhesive middle layer 25 corresponds to the outer through-hole portion 243 of the solder outer layer 24, so that the inner conductive portion 262 of the conductive inner layer 26 can pass through the middle through-hole portion 252 and the outer through-hole portion 243 toward the outside of the metal shell 22. The middle through-hole portion 252 and the outer through-hole portion 243 may be opened at the middle of the cover so that the inner conductive portion 262 can maintain a sufficient distance from each position in the circumferential direction of the cylinder.

The electrodes of the cell 21 may be in direct contact with the inner conductive portion 262 of the conductive inner layer 26. The top and bottom surfaces of the middle insulating adhesive portion 251 are adhered to the outer adhesive middle portion 242 and the inner adhesive portion 261, respectively, to achieve the insulating connection of the welding outer layer 24 and the conductive inner layer 26. The welding outer layer 24 and the metal shell 22 are welded and sealed, and the conductive inner layer 26 and the welding outer layer 24 are seamlessly bonded through the insulating bonding middle layer 25, so that the cover shell 23 can seal the metal shell 22. Here, when the welding outer layer 24 is connected to the metal shell 22, the welding outer layer 24 and the conductive inner layer 26 are already in insulation connection in advance, so that no additional insulating film is required.

The insulating bonding middle layer 25 is made of a material with insulating property and electrolyte corrosion resistance, the thermal shrinkage rate of the insulating bonding middle layer 25 is less than 6% at the temperature of more than or equal to 100 ℃, the thermal shrinkage rate refers to the volume change of a thermoplastic material caused by the inherent thermal expansion rate, namely, the volume change of the insulating bonding middle layer 25 is not more than 6% of the original volume at the temperature of more than or equal to 100 ℃, so that the insulating bonding middle layer 25 can be fully connected with the conductive inner layer 26 and the welding outer layer 24 after being fully melted, and the bonding effect is ensured.

The bonding strength between the insulating bonding middle layer 25 and the outer bonding middle part 242 and the inner bonding part 261 is more than or equal to 0.1N per square millimeter at the cooling normal temperature, so that the bonding stability between the insulating bonding middle layer 25 and the conductive inner layer 26 and the welding outer layer 24 can be ensured; specifically, the bonding strength between the middle insulating bonding portion 251 and the outer bonding middle portion 242 and the inner bonding portion 261 at a cooling normal temperature is greater than or equal to 1N per square millimeter and less than or equal to 5.0N per square millimeter, so as to prevent the internal stress of the cover shell 23 from being too high, and thus the cover shell 23 can be prevented from being damaged by an internal force in a subsequent processing or using process.

According to the invention, the cover shell 23 of the button battery 20 is divided into a welding outer layer 24, an insulating bonding middle layer 25 and a conductive inner layer 26, wherein the welding outer layer 24 is electrically conducted with one pole of the battery cell 21, the conductive inner layer 26 is electrically conducted with the other pole of the battery cell 21, and after the external welding side portion 241 of the welding outer layer 24 is welded with the opening end of the metal shell 22, the battery cell 21 can be packaged.

Since the conductive inner layer 26 and the welding outer layer 24 are insulated by the insulating adhesive middle layer 25, the metal shell 22 is also insulated from the conductive inner layer 26, so that the two electrodes of the battery cell 21 can be prevented from being conducted and shorted with each other; since the conductive inner layer 26 and the welding outer layer 24 of the cover shell 23 are insulated in advance, when the cover shell 23 is used for packaging the metal shell 22, only the welding outer layer 24 and the metal shell 22 need to be welded without arranging an insulating film, so that the packaging process of the battery can be simplified, and the packaging efficiency can be improved.

Compared with the prior art, the metal shell 22 and the cover shell 23 are sealed by welding, so that the sealing performance and the stability are well improved, the sealing is not carried out by physical stress extrusion between shells, the cover shell 23 is made in advance, insulation is carried out through the middle insulation bonding part 251, the insulation performance can be improved, and meanwhile, the protection effect can be achieved under certain conditions.

Further, the cover shell 23 of the button cell 20 in the present application adopts a three-layer structure, the stability and the firmness of the structure are enhanced, the middle insulation bonding portion 251 is located between two layers of stainless steel, the waterproof and electrolyte corrosion-proof properties are strong, the external contact area between the middle insulation bonding portion 251 and the metal shell 22 is small, and external moisture can be effectively prevented from entering the metal shell 22; meanwhile, the contact area is small, and the path length of the middle insulation bonding part 251 between the outside and the inside of the metal shell 22 is compared, so that the influence of external moisture and the like on the battery cell 21 and the electrolyte inside the metal shell 22 is further avoided.

Similarly, for the inside of the button cell 20, only the inner edge of the middle insulating bonding part 251 can contact with the electrolyte in the button cell 20, so that the contact area between the electrolyte and the middle insulating bonding part 251 can be effectively reduced, the middle insulating bonding part 251 can be effectively protected, the influence of softening, corrosion and the like of the electrolyte on the middle insulating bonding part 251 can be avoided, and the service life of the cell can be effectively prolonged. Furthermore, the path from the inside of the button cell 20 to the outside of the button cell 20 of the middle insulation adhesive part 251 is also long, and the service life of the battery can be further prolonged.

The insulating body 13 may be a circular plate or a square plate, and is not particularly limited. The first metal connecting area is used for enabling the electrode wire of the electric equipment to be in butt contact with the welding activity and electrically conducted, and the electrode wire of the electric equipment can be a positive electrode wire or a negative electrode wire and is not limited herein; specifically, for example, when the first electrode metal connection region 16 is electrically connected to the positive electrode of the button cell 20, the positive electrode wire of the electrical device is welded or in contact with the positive electrode wire; when the first electrode metal connecting region 16 is electrically connected to the negative electrode of the button cell 20, the negative electrode wire of the electric device is welded or in contact therewith.

The shape of the fixing base plate 12 may correspond to that of the insulating body 13, so that the installation space formed by the fixing base plate 12 and the insulating body 13 is more regular, for example, the fixing base plate 12 and the insulating body 13 are both configured as circular plates, so that the installation space is adapted to the button cell 20 in a circular button shape. After the button cell 20 is installed in the installation space, the cover shell 23 faces the conducting surface 131, the first metal elastic structure 14 abuts against the conductive inner layer 26, and the second metal elastic structure 15 abuts against the welding outer layer 24.

The purpose of the contact between the conductive surface 131 and the button cell 20 is to better fix the button cell 20, and therefore, the conductive surface 131 and the button cell 20 may be in direct contact or indirect contact, or only needs to be able to stably determine that the button cell 20 can be stably fixed in the installation space. Preferably, the conducting surface 131 is insulated, and after the first metal elastic structure 14 abuts against the conductive inner layer 26, the first metal elastic structure is electrically conducted with the first electrode metal connecting region 16 through the internal wiring of the insulating body 13; after the second metal elastic structure 15 is abutted to the welding outer layer 24, electrical conduction is formed between the second metal connecting area 17 and the inner wiring of the insulating body 13.

The second electrode metal connection region 17 is used for welding or abutting contact electrical conduction of an electrode wire of an electric device, and may be a positive electrode wire or a negative electrode wire, which is not limited herein; specifically, for example, when the second electrode metal connection region 17 is electrically connected to the positive electrode of the button cell 20, the positive electrode wire of the electrical equipment is welded or in contact with the button cell; when the second electrode metal connecting region 17 is electrically connected with the negative electrode of the button cell 20, the negative electrode wire of the electric device is welded or in contact with the button cell.

The bottom case body 121 may be made of a conductive material, such as stainless steel, and copper, nickel, tin, or an alloy of these elements, so as to maintain sufficient structural strength while being conductive; and may be made of insulating material, and is not limited herein.

The supporting plate 122 is used to realize the fixed connection between the bottom casing main body 121 and the insulating body 13, and the supporting plate 122 is connected to the insulating body 13 through the connecting structure 133 to improve the connection strength. The supporting plate 122 may be a metal plate or an insulating plate, which is not limited herein.

After the button cell 20 is installed in the installation space, the positive electrode of the button cell 20 abuts against the first metal elastic structure 14 on the insulating body 13, and the negative electrode of the button cell 20 abuts against the second metal elastic structure 15, that is, the positive electrode of the button cell 20 can be electrically connected with the first electrode metal connection area 16 on the insulating body 13, so that the positive electrode wire welded to the first electrode metal connection area 16 can be electrically connected with the positive electrode of the button cell 20. The negative electrode of the button cell 20 can be electrically connected with the second electrode metal connection area 17 on the insulation body 13, so that the negative electrode wire welded on the second electrode metal connection area 17 can be electrically connected with the negative electrode of the button cell 20, and the button cell 20 and the electric device can form a current loop through the cell wire connection base 10.

Because the positive pole line and the negative pole line of the electric equipment can be welded on the insulating body 13, the connection difficulty of the electric equipment and the button cell 20 can be further reduced, and the connection efficiency and the connection strength can be improved. Compare with the welding of tradition at two terminal surfaces of button cell 20, this application can directly weld in a face, can accomplish by a step at automatic welded in-process very much, has improved welding efficiency.

Further, the material of the first electrode metal connection region 16 and the second electrode metal connection region 17 on the insulating body 13 is copper, nickel, tin, or an alloy of these elements. The first electrode metal connection region 16 and the second electrode metal connection region 17 are used for electrode wire welding and conducting electricity, and copper, nickel and tin can reduce the connection difficulty during welding so as to further improve the welding efficiency.

In addition, when the button cell 20 is replaced, the electrode wires do not need to be operated, and only the button cell 20 needs to be detached, so that the replacement efficiency of the button cell 20 is further improved.

Furthermore, because the insulating bonding middle layer 25 of the cover shell 23 is of a glue layer structure, if the electrode wire of the electric equipment is directly welded on the cover shell 23, the insulating bonding middle layer 25 can be damaged by high temperature in the welding process, so that the effective insulation or bonding cannot be realized, and therefore, by arranging the lead connecting seat 10, the damage of the button cell 20 during application can be reduced, and the rejection rate can be reduced.

Because outer fishplate bar 11 and PMKD 12 fixed connection accomodate button cell 20 in the installation space, form the extrusion to button cell 20's casing, can improve button cell 20's life-span, because button cell 20's electric core 21 can produce gas at the during operation, gaseous too much will produce the extrusion to button cell 20 casing, and the extrusion all the time, it is possible that button cell 20 positive negative pole casing takes place to become flexible, and then with the air contact, reduces button cell 20 life. In the application, the lead connecting seat 10 can apply pressure to the shell of the button battery 20 under the fixed connection action of the external connecting plate 11 and the fixed bottom plate 12, so that the impact of the gas inside the button battery 20 on the shell is reduced to a certain extent, and the service life of the button battery 20 is further prolonged; the button cell 20 can be prevented from being broken down to bring dangers, such as short circuit, gas is rapidly generated inside the button cell 20, the shell of the button cell 20 is opened, explosion is caused, due to the fact that the external connecting plate 11 and the fixing base plate 12 block the shell of the button cell 20, gas is not easy to open, gaps are formed for gas investigation, and then the damage caused by explosion cannot be caused.

In addition, the second metal elastic structure 15 can also apply an inward cover shell 23 pressure F2 to the welding outer layer 24, and since the cover shell 23 pressure F2 is greater than a conductive pressure F1 applied to the inner conductive part 262 by the first metal elastic structure 14, the cover shell 23 pressure F2 can clamp the insulating bonding middle layer 25 by the welding outer layer 24, so that the bonding part between the insulating bonding middle layer 25 and the welding outer layer 24 or the conductive inner layer 26 is prevented from being punched by gas generated inside the button cell 20, the structural stability of the button cell 20 can be effectively improved, and the service life of the button cell 20 is further prolonged.

In one embodiment, as shown in fig. 2 and 3, the bottom case body 121 is provided with a third elastic structure 123. The third elastic structure 123 may press the button cell 20 from the bottom of the button cell 20 to cooperate with the first metal elastic structure 14 and the second metal elastic structure 15 to clamp the button cell 20, so that the installation stability of the button cell 20 in the installation space may be improved. In addition, the third elastic structure 123 can also increase the pressure of the wire connecting seat 10 on the casing of the button cell 20, so as to further reduce the impact of the gas inside the button cell 20 on the casing, thereby prolonging the service life of the button cell 20.

Specifically, the third elastic structure 123 is a metal elastic sheet, so that the metal shell 22 of the button cell 20 and the third elastic structure 123 are electrically connected. It is understood that both the bottom case main body 121 and the supporting plate 122 of the fixing base 12 may be provided as metal plates, so that the metal case 22 of the button cell 20 may be further electrically conducted to the second metal electrode connection region of the insulating body 13 through the fixing base 12. It should be understood that the supporting plate 122 not only plays a role of supporting the fixed connection, but also serves to transmit the electric conduction formed by the third elastic structure 123 on the bottom case body 121 and the bottom of the button cell 20 to the connecting structure 133 and further to the second metal electrode connection region. Since the metal casing 22 of the button cell 20 is welded to the welding outer layer 24 of the cover 23, the metal casing 22, like the welding outer layer 24, can serve as the same electrode, such as a negative electrode, of the button cell 20, and thus the electrical conductivity stability of the connection region between the electrode of the button cell 20 and the second metal electrode can be improved.

In one embodiment, the insulating adhesive middle layer 25 is made of one or more of PP (polypropylene), PFA (a small amount of copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), ETFE (ethylene-tetrafluoroethylene copolymer), and PVC (polyvinyl chloride).

Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. In industry, copolymers of ethylene with small amounts of alpha-olefins are also included. The polyethylene is odorless, nontoxic, has wax-like hand feeling, excellent low-temperature resistance and good chemical stability, and can resist corrosion of most of acid and alkali. Is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation.

Polypropylene (PP) is a polymer formed by propylene addition polymerization, is a white waxy material, is transparent and light in appearance and flammable, has a melting point of 165 ℃, is softened at about 155 ℃, and has a use temperature range of-30-140 ℃. The modified PP is modified based on PP, for example, the modified PP used in this embodiment is a metal-philic modified Polypropylene resin (hereinafter, referred to as metal-philic modified PP), which can be chemically modified based on PP by copolymerization, grafting or crosslinking to make the surface have metal-philic characteristics, so that the modified PP can be fused with the metal surface by heating to form a good bonding seal.

PFA is known as tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (also known as perfluoroalkoxy, soluble polytetrafluoroethylene), which is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt cohesiveness is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with the polytetrafluoroethylene. The resin can be directly processed into products by adopting a common thermoplastic molding method. PFA has excellent chemical corrosion resistance at a long-term use temperature of-200 ℃ to 260 ℃, resists all chemicals, has the lowest friction coefficient in plastics, has good electrical property, has no temperature influence on electrical insulation, and is called as 'plastics king'. The PFA has chemical resistance similar to that of polytetrafluoroethylene, better than vinylidene fluoride, better creep resistance and compression strength than that of polytetrafluoroethylene, high tensile strength and elongation of up to 100-; the dielectric property is good, and the radiation resistance is excellent; the flame retardance is high; has no toxicity or harm, has physiological inertia, and can be implanted into human body.

In one embodiment, the button cell 20 is a rechargeable battery, so that the button cell 20 can be reused by charging, thereby prolonging the service life of the button cell 20. When the button cell 20 needs to be charged, the button cell 20 only needs to be detached from the cell lead connecting seat 10, so that the repeated use difficulty of the button cell 20 can be reduced, and the repeated use rate can be improved.

In one embodiment, as shown in fig. 4, the second metal elastic structure 15 is provided as a ring-shaped metal spring. The inner diameter of the annular metal spring is larger than the diameter of the outer through hole portion 243 so that the annular metal spring can be annularly disposed to the outer through hole portion 243. The annular metal spring can increase the contact area with the welding outer layer 24, thereby improving the contact stability to ensure the electrical conduction stability.

In addition, the second metal elastic structure 15 generates a cover shell 23 pressure F2 on the welding outer layer 24, which acts on the welding outer layer 24 in a ring shape, so that multiple positions of the welding outer layer 24 can be pressed on the insulating adhesive middle layer 25, thereby increasing the pressing area and further improving the structural stability of the button cell 20.

In one embodiment, the contact position of the second metal elastic structure 15 and the welding outer layer 24 is located at the position corresponding to the side of the bonding position of the insulating bonding middle layer 25 and the welding outer layer 24.

The bonding position of the periphery of the insulating bonding intermediate layer 25 and the welding outer layer 24 is exposed to the electrolyte, i.e., the electrolyte easily corrodes the insulating bonding intermediate layer 25 from the periphery thereof, so that the bonding position of the insulating bonding intermediate layer 25 and the welding outer layer 24 is corroded and separated.

The second metal elastic structure 15 is close to the periphery of the middle insulating bonding layer 25, so that the pressure F2 of the cover shell 23 formed by the second metal elastic structure 15 on the welding outer layer 24 can accurately act on the peripheral bonding part of the welding outer layer 24 and the middle insulating bonding layer 25, the bonding part of the middle insulating bonding layer 25 and the welding outer layer 24 is prevented from being corroded and separated, and the structural stability of the cover shell 23 in electrolyte is improved.

In one embodiment, as shown in fig. 1 and 3, the external junction 132 is provided with one first electrode metal connection region 16, and two second electrode metal connection regions 17, wherein one second electrode metal connection region 17 is adjacent to the first electrode metal connection region 16, and the other second electrode metal connection region 17 is disposed on the opposite side of the first electrode metal connection region 16.

The method can be understood as setting one positive metal connection area and two negative metal connection areas, or two positive metal connection areas and one negative metal connection area, wherein one positive metal connection area and one negative metal connection area are set at adjacent positions on the same side, and the other positive metal connection area or negative metal connection area is set at an opposite position on the other side, and in a specific use process, if an external electric device adopts a welding mode, the positive metal connection area and the negative metal connection area adjacent on the same side can be preferably selected for use, so that the welding can be facilitated; if the mode of conflict electric conduction is carried out, the positive pole metal connecting area and the negative pole metal connecting area which are opposite to each other at two sides can be selected and used preferably, so that the uniformity of conflict electric conduction stress can be facilitated, and the stability is further improved.

The invention further provides an electric device, which comprises an electronic device main body containing an electric device and a button cell assembly, wherein the specific structure of the button cell assembly refers to the above embodiments, and the electric device adopts all the technical schemes of all the embodiments, so that the electric device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated herein. Wherein the button cell assembly is located in the electronic device body, and one of the poles of the electric device is electrically connected to the first electrode metal connection region 16; the other pole is electrically connected to the second electrode metal connection region 17.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.