Button cell

Abstract

The utility model relates to the technical field of batteries, in particular to a button battery, which comprises a battery cell body, a battery cell protection plate and an injection molding plastic cover, one end of the battery cell body is provided with a tab, the battery cell protection plate is positioned at one end of the battery cell body, which is provided with the tab, and the battery cell protection plate is connected with the tab; the outer wall of the circumference of the battery cell body is provided with a folding edge formed by folding outwards, and the injection molding rubber cover covers the battery cell protection plate and is connected with the folding edge to form a closed space; and an external hardware block is arranged on the battery cell protection plate and penetrates out of the injection molding rubber cover. Compared with the traditional plastic shell or metal shell, the injection molding has the advantages that the thicknesses of the side wall and the top surface are thinner, the internal space capacity of the battery is larger, and the cost is lower.

Description

Technical Field

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

[0002] Button Cell, also known as button battery, refers to a battery with the appearance and size of a button. Generally speaking, button batteries have a larger diameter and a thinner thickness. With the increasingly accelerated development of electronic products, button batteries have been widely used in various micro-electronic products because of their lightness and compactness. They are mainly used as backup power sources for various electronic products, such as Bluetooth headsets, electronic watches, electronic dictionaries, electronic scales, remote controls, etc. People's requirements for button batteries are also increasing, and the European Union has issued a new version of the "Batteries and Waste Batteries" regulations, requiring batteries to meet the requirements of removable and replaceable.

[0003] In the prior art, many battery-demanding devices generally require button batteries to be thinner, but current conventional detachable batteries are all realized by adding an external plastic shell or metal shell. At the same time, the packaging structure of the battery shell also occupies some volume, resulting in a smaller internal space for the button battery, which seriously affects the battery capacity and the battery life of the customer's entire device. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a button-type battery, so as to at least solve the problem that the internal space of the existing button-type battery is small, which affects the battery capacity and the battery life of the customer's whole device.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] The utility model provides a button battery, comprising a battery cell body, a battery cell protection plate and an injection molded cover, wherein one end of the battery cell body is provided with a pole ear, the battery cell protection plate is located at the end of the battery cell body having the pole ear, and the battery cell protection plate is connected to the pole ear; the circumferential outer wall of the battery cell body is provided with a folded edge formed by folding outwards, the injection molded cover covers the battery cell protection plate and is connected with the folded edge to form a closed space; the battery cell protection plate is provided with an external hardware block, and the external hardware block passes through the injection molded cover.

[0007] In some embodiments, the injection molded cover has two through holes, and the external hardware block is inserted into the through holes and protrudes from the outer surface of the injection molded cover.

[0008] In some embodiments, the battery cell protection plate further has two nickel sheets, the tabs include a positive tab and a negative tab, and the two nickel sheets are welded to the positive tab and the negative tab, respectively.

[0009] In some embodiments, the folded edge has multiple bent bodies arranged at equal distances along the circumferential outer wall of the battery cell body, and the tip of the bent body faces the battery cell body; there is a gap between the folded edge and the battery cell body, and the gap is filled with a colloid block by injection molding, and the colloid block is injection molded as a whole with the injection molded rubber cover.

[0010] In some embodiments, the injection-molded cover is wrapped around the battery cell body by injection molding, and the injection-molded cover covers the battery cell protection plate and is wrapped around the outside of the folded edge to form a closed space.

[0011] In some embodiments, the colloid block is completely located on the circumferential inner wall of the injection-molded plastic cover.

[0012] In some embodiments, the injection-molded cover is wrapped around the battery cell body by injection molding, and the injection-molded cover covers the battery cell protection plate and is connected to the top end of the folded edge to form a closed space.

[0013] In some embodiments, the battery cell protection plate is a PCM plate, and the PCM plate is bonded to the end surface of one end of the battery cell body having the pole ear.

[0014] In some embodiments, the battery cell protection plate is an FPC, and the FPC is bonded to the end surface of one end of the battery cell body having the pole ear.

[0015] In some embodiments, a reinforcing sheet is attached to the FPC.

[0016] The button battery of the utility model uses an injection molded cover made of plastic or glue. The injection molded cover covers the battery protection plate and is connected to the folded edge outside the battery body to form a closed space. The top surface of the battery cell has hardware carried by PCM or FPC. After injection molding, the hardware on the top surface is exposed and limited through the through hole of the injection molded cover, and contacts the shrapnel of the customer's whole machine as the positive and negative electrodes, realizing the requirements of detachability and replaceability. Compared with traditional plastic shells or metal shells, the injection molding of the utility model has thinner side walls and top surfaces, and the battery can have a larger space capacity inside, and the cost is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a button battery of the utility model;

[0018] Figure 2 It is a cross-sectional view of the button battery of the utility model;

[0019] Figure 3 It is a schematic diagram of the explosion structure of the button battery of the utility model;

[0020] Figure 4 It is a schematic diagram of the FPC structure;

[0021] Figure 5 It is a schematic diagram of the structure of the injection molded cover;

[0022] Among them, the battery cell body 100, the tab 110, the folded edge 120, the bent body 121, the battery cell protection plate 200, the external hardware block 210, the nickel sheet 220, the reinforcement sheet 230, the injection molding cover 300, the through hole 310, the colloid block 320, and the gap 001. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0024] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] In the prior art, many battery-demanding devices generally require button batteries to be thinner, but the current conventional detachable batteries are all realized by adding a plastic shell or a metal shell. At the same time, the packaging structure of the battery shell will also occupy some volume, resulting in a smaller internal space for the button battery, which seriously affects the battery capacity and the battery life of the customer's entire machine. To this end, the utility model proposes a button battery, which uses an injection molded cover made of plastic or glue. The injection molded cover covers the battery cell protection plate and is connected to the folded edge of the battery cell body to form a closed space. The top surface of the battery cell has hardware supported by PCM or FPC. After injection molding, the hardware on the top surface is exposed and limited through the through holes of the injection molded cover, and contacts the customer's entire machine shrapnel as the positive and negative electrodes, thereby achieving the requirements of detachability and replaceability. Compared with traditional plastic shells or metal shells, the injection molding of the utility model has thinner side walls and top surfaces, and the battery can have a larger space capacity inside, and the cost is also lower.

[0026] Please refer to Figure 1-Figure 5 The button battery of the utility model includes a battery cell body 100, a battery cell protection plate 200 and an injection molded cover 300. One end of the battery cell body 100 has a pole ear 110, the battery cell protection plate 200 is located at the end of the battery cell body 100 having the pole ear 110, and the battery cell protection plate 200 is connected to the pole ear 110; the circumferential outer wall of the battery cell body 100 has a folded edge 120 formed by folding outward, the injection molded cover 300 covers the battery cell protection plate 200 and is connected to the folded edge 120 to form a closed space; the battery cell protection plate 200 has an external hardware block 210, and the external hardware block 210 passes through the injection molded cover 300.

[0027] In some embodiments, please refer to Figure 5 The injection molded cover 300 has two through holes 310, the size and shape of the through holes 310 are compatible with the external hardware block 210, and the external hardware block 210 is inserted into the through holes 310 and protrudes from the outer surface of the injection molded cover 300, so as to contact the shrapnel of the customer's whole machine as positive and negative electrodes, so as to achieve the requirements of detachability and replacement. In addition, the through holes 310 on the injection molded cover 300 can also limit the external hardware block 210.

[0028] The shape of the external hardware block 210 can be but not limited to square, round, arc, ring and other special shapes. The external hardware block 210 is an ordinary metal block. The outer surface of the external hardware block 210 is gold-plated and fixed to the battery cell protection board 200 by solder paste. There is a line inside the battery cell protection board 200 to connect the external hardware block 210 to the nickel sheet 220. After the nickel sheet 220 is connected to the pole ear 110 by welding, the external hardware block 210 can assume the positive and negative pole output functions.

[0029] In some embodiments, the battery cell protection plate 200 further has two nickel sheets 220 , the tabs 110 include a positive tab and a negative tab, and the two nickel sheets 220 are welded to the positive tab and the negative tab, respectively, to improve the stability of the overall battery structure.

[0030] The nickel sheet 220 in the utility model includes but is not limited to a flat nickel sheet 220, an L-shaped nickel sheet 220, and a U-shaped nickel sheet 220, as long as it can achieve electrical connection with the tab 110. The nickel sheet 220 can be installed on one side of the battery cell protection board 200 with the external hardware block 210, or on the other side, that is, the nickel sheet 220 and the external hardware block 210 are respectively located on opposite sides of the battery cell protection board 200. At this time, the battery cell protection board 200 has a groove on one side where the nickel sheet 220 is installed, and the nickel sheet 220 is installed in the groove. At this time, the nickel sheet 220 does not contact the top of the battery cell body 100, and only the bottom surface of the battery cell protection board 200 is in contact with the top of the battery cell body 100; it can also be that the battery cell protection board 200 has a groove on one side where the nickel sheet 220 is installed, and the nickel sheet 220 is installed in the groove, and the bottom surfaces of the nickel sheet 220 and the battery cell protection board 200 are both in contact with the top of the battery cell body 100.

[0031] On the battery cell protection board 200, in addition to the nickel sheet 220 and the external hardware block 210, customized IC and other components can be used to meet the customer's circuit protection needs, or no components are added to only provide a path function.

[0032] In some embodiments, the folded edge 120 has multiple bent bodies 121 arranged at equal distances along the circumferential outer wall of the battery cell body 100, and the tip of the bent body 121 faces the battery cell body 100; there is a gap 001 between the folded edge 120 and the battery cell body 100, and the gap 001 is mainly located between two adjacent bent bodies 121, and the gap 001 is injection-molded and filled with a colloid block 320, and the colloid block 320 and the injection-molded rubber cover 300 are integrally injection-molded.

[0033] In some embodiments, the injection molded cover 300 is wrapped around the battery cell body 100 by injection molding, and the injection molded cover 300 covers the battery cell protection plate 200 and is wrapped around the outside of the folded edge 120 to form a closed space, that is, the injection molded cover 300 wraps both the battery cell protection plate 200 and the folded edge 120. At this time, the colloid block 320 is completely located on the circumferential inner wall of the injection molded cover 300.

[0034] In other embodiments, the injection molding cover 300 is wrapped on the battery body 100 by injection molding, and the injection molding cover 300 covers the battery protection plate 200 and is connected to the top of the folded edge 120 to form a closed space. At this time, the lower end surface of the injection molding cover 300 is sealed with the top end surface of the folded edge 120, and the colloid block 320 is filled in the gap 001 between the folded edge 120 and the battery body 100 to prevent the injection molding cover 300 from rotating on the battery body 100.

[0035] In some embodiments, the cell protection board 200 is a PCM board, which is bonded to the end surface of the cell body 100 having the tab 110. Specifically, the PCM board is bonded to the end surface of the cell body 100 having the tab 110 by double-sided adhesive or double-sided adhesive foam.

[0036] Please refer to Figure 4 In other embodiments, the cell protection plate 200 is an FPC, and the FPC is bonded to the end surface of the cell body 100 having the pole ear 110. Specifically, the FPC is bonded to the end surface of the cell body 100 having the pole ear 110 by double-sided adhesive or double-sided adhesive foam. A reinforcing sheet 230 may be attached to the upper and lower parts of the FPC to improve its bearing strength. The reinforcing sheet 230 attached to the bottom of the FPC may be, but is not limited to, FR4, steel sheet, PI and other materials.

[0037] The material of the injection molding cover 300 can be a filling material such as plastic or curing glue. In addition, a label can be set on the outer side or top surface of the injection molding cover 300 to intuitively display the parameter information of the button battery.

[0038] When the button battery of the utility model is manufactured, the pole ear 110 is welded to the nickel sheet 220 on the battery cell protection plate 200, and the battery cell protection plate 200 is bonded to the end face of the battery cell body 100 having the pole ear 110 by double-sided tape or double-sided adhesive foam. Then, the battery cell body 100 is pre-placed in a mold, and a filling material such as plastic or curing glue is injection molded to form an injection molded cover 300 that covers the battery cell protection plate 200 and is connected to the folded edge 120 to form a closed space. During the injection molding, the filling material such as plastic or curing glue filled in the gap 001 between the folded edge 120 and the battery cell body 100 forms a colloid block 320, thereby realizing the packaging of the button battery and preventing internal leakage.

[0039] The thickness of the side wall of a traditional plastic shell is 1.0-2.0 mm, while the thickness of the side wall of the injection-molded plastic cover of the utility model is only 0.35-0.4 mm. It can be seen that the injection-molded plastic cover has thinner side walls and top surfaces than traditional plastic shells or metal shells, and the battery can have a larger space capacity inside, and the cost is also lower.

[0040] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A button cell battery, comprising a cell body, characterized in that: It also includes a battery cell protection plate and an injection molded cover, wherein one end of the battery cell body has a pole ear, the battery cell protection plate is located at the end of the battery cell body having the pole ear, and the battery cell protection plate is connected to the pole ear; the circumferential outer wall of the battery cell body has a folded edge formed by folding outward, the injection molded cover covers the battery cell protection plate and is connected to the folded edge to form a closed space; the battery cell protection plate has an external hardware block, and the external hardware block passes through the injection molded cover.

2. The button battery according to claim 1, characterized in that: The injection-molded cover is provided with two through holes, and the external hardware block is passed through the through holes and protrudes from the outer surface of the injection-molded cover.

3. The button battery according to claim 1, characterized in that: The battery cell protection plate is also provided with two nickel sheets, the pole ears include a positive pole ear and a negative pole ear, and the two nickel sheets are welded to the positive pole ear and the negative pole ear respectively.

4. The button cell according to claim 1, characterized in that: The folded edge has multiple bent bodies arranged at equal distances along the circumferential outer wall of the battery cell body, and the tips of the bent bodies face the battery cell body; there is a gap between the folded edge and the battery cell body, and a colloid block is injection-molded in the gap, and the colloid block and the injection-molded rubber cover are integrally injection-molded.

5. The button cell according to claim 4, characterized in that: The injection-molded rubber cover is wrapped on the battery body by injection molding, and the injection-molded rubber cover covers the battery protection plate and is wrapped on the outside of the folded edge to form a closed space.

6. The button battery according to claim 5, characterized in that: The colloid block is completely located on the circumferential inner wall of the injection-molded rubber cover.

7. The button cell according to claim 4, characterized in that: The injection-molded cover is wrapped on the battery body by injection molding, and the injection-molded cover covers the battery protection plate and is connected to the top end of the folded edge to form a closed space.

8. The button cell according to any one of claims 1 to 7, characterized in that: The battery cell protection plate is a PCM plate, and the PCM plate is bonded to the end surface of one end of the battery cell body having the pole ear.

9. The button cell according to any one of claims 1 to 7, characterized in that: The battery cell protection plate is an FPC, and the FPC is bonded to the end surface of one end of the battery cell body having a pole ear.

10. The button cell according to claim 9, characterized in that: A reinforcing sheet is pasted on the FPC.

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