Steel buckle battery and electric product

Abstract

The utility model provides a steel buckle battery and an electric product. The steel button battery comprises a shell and a cover cap, a containing groove is formed in the shell, the cover cap covers the shell, the steel button battery further comprises an anti-explosion assembly, the anti-explosion assembly comprises a PTC thermistor layer and two electrode layers, the two electrode layers are connected to the two opposite side faces of the PTC thermistor layer respectively, and the PTC thermistor layer is arranged on the PTC thermistor layer. Wherein one electrode layer is also connected to one side surface of the shell away from the cap. When the temperature of the PTC thermistor layer is lower than the power-off temperature, the PTC thermistor layer is conducted again, so that the steel button battery can still supply power continuously, irreversible damage of the steel button battery after overheating is avoided, and the steel button battery can supply power continuously after the overheating problem is eliminated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of button batteries, and in particular to a button battery and an electrical product. Background Art

[0002] Button cell is a small lithium-ion battery, which is widely used in electronic products due to its compact structure. In the process of using a large number of button cells, extreme abuse such as overcharging and short circuit is inevitable. When button cells are used in extreme conditions, the battery temperature will be too high, which will increase the internal pressure of the button cells due to overheating, causing the button cells to explode, which may damage the battery or even cause safety accidents.

[0003] In the related technology, for example, CN215418489U is a steel shell button battery with a double explosion-proof structure. The surface of the steel button battery is provided with explosion-proof notches and explosion-proof lines. When the steel button battery is overheated, its internal pressure reaches a certain value, its internal pressure will break through the explosion-proof notches and explosion-proof lines, causing the surface of the steel button battery to rupture, and the gas in the steel button battery leaks out through the rupture, thereby achieving pressure relief of the steel button battery, avoiding the accident of explosion of the steel button battery, and improving the safety of the steel button battery.

[0004] However, after the button battery overheats, the button battery suffers irreversible damage due to the rupture of its surface. Even if the safety problem of the button battery is eliminated, the button battery cannot continue to supply power. Utility Model Content

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a button battery and an electrical product that can avoid irreversible damage due to overheating.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A steel button battery comprises a shell and a cap, wherein the shell is formed with a receiving groove, and the cap is covered on the shell. The steel button battery also comprises an explosion-proof component, wherein the explosion-proof component comprises a PTC thermistor layer and an electrode layer, wherein the number of the electrode layers is two, and the two electrode layers are respectively connected to two opposite side surfaces of the PTC thermistor layer, wherein one of the electrode layers is also connected to a side surface of the shell facing away from the cap.

[0008] In one embodiment, the electrode layer is a nickel-plated layer.

[0009] In one embodiment, the thickness of the electrode layer is 0.01 mm to 0.1 mm.

[0010] In one embodiment, the thickness of the PTC thermistor layer is 0.15 mm to 0.45 mm.

[0011] In one embodiment, the explosion-proof component has a thickness of 0.2 mm to 0.5 mm.

[0012] In one of the embodiments, one of the electrode layers is attached to a side of the shell facing away from the cap.

[0013] In one embodiment, the cap includes a support plate, a cover plate and an insulating composite layer, the periphery of the support plate is connected to the opening of the shell, a avoidance hole is opened at the center of the support plate, the cover plate is located on the side of the support plate away from the shell, the center of the cover plate is arranged corresponding to the avoidance hole, and the insulating composite layer is clamped between the support plate and the cover plate.

[0014] In one of the embodiments, the cap further includes a connecting column, the connecting column is passed through the avoidance hole, and the connecting column is fixedly connected to the cover plate.

[0015] In one embodiment, the insulating composite layer is further clamped between the connecting pillar and the supporting plate.

[0016] An electrical product, comprising the button battery described in any one of the above embodiments.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] The resistance value of the PTC thermistor layer increases with the increase of temperature. When the PTC thermistor layer reaches the power-off temperature, the PTC thermistor layer will not be able to conduct, and the circuit of the button battery will be disconnected to avoid the problem of explosion of the button battery. When the temperature of the PTC thermistor layer is lower than the power-off temperature, the PTC thermistor layer will be turned on again, so that the button battery can continue to supply power, avoiding the irreversible damage of the button battery after overheating, so that the button battery can continue to supply power after eliminating the overheating problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a steel button battery according to an embodiment;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the explosion-proof component of the steel button battery shown.

[0022] Figure numerals: 10, steel button battery; 100, shell; 101, receiving groove; 300, cap; 310, support plate; 311, avoidance hole; 320, cover plate; 330, insulating composite layer; 340, connecting column; 500, explosion-proof component; 510, PTC thermistor layer; 520, electrode layer. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0027] like Figure 1 and Figure 2As shown, a button battery 10 of an embodiment includes a housing 100 and a cap 300. The housing 100 is formed with a receiving groove 101 for receiving a battery cell. The cap 300 covers the housing 100. The button battery 10 also includes an explosion-proof component 500. The explosion-proof component 500 includes a PTC thermistor layer 510 and an electrode layer 520. There are two electrode layers 520. The two electrode layers 520 are respectively connected to two opposite sides of the PTC thermistor layer 510, and one electrode layer 520 is also connected to a side of the housing 100 away from the cap 300. In this embodiment, when the button battery 10 is overheated, the temperature of the PTC thermistor layer 510 is increased to the power-off temperature, so that the resistance value of the PTC thermistor layer 510 increases sharply, thereby disconnecting the circuit of the button battery 10, preventing the button battery 10 from continuing to heat up, and thus preventing the button battery 10 from exploding. When the temperature of the PTC thermistor layer 510 is lower than the power-off temperature, the PTC thermistor layer 510 will be turned on again, so that the circuit of the button battery 10 is turned on.

[0028] It should be noted that the power-off temperature of the PTC thermistor layer 510 is pre-set by the manufacturer, and different types of thermistors PTC have different power-off temperatures. Generally speaking, the power-off temperature of thermistors PTC is between 60°C and 200°C.

[0029] In the above-mentioned button battery 10, the resistance value of the PTC thermistor layer 510 increases with the increase of temperature. When the PTC thermistor layer 510 reaches the power-off temperature, the PTC thermistor layer 510 will not be able to conduct, so that the circuit of the button battery 10 is disconnected, so as to avoid the problem of explosion of the button battery 10. When the temperature of the PTC thermistor layer 510 is lower than the power-off temperature, the PTC thermistor layer 510 will be turned on again, so that the button battery 10 can still continue to supply power, avoiding the button battery 10 from irreversible damage after overheating, so that the button battery 10 can continue to supply power after eliminating the overheating problem.

[0030] In one embodiment, the electrode layer 520 is a nickel-plated layer to improve the conductivity of the electrode layer 520 .

[0031] In one embodiment, the thickness of the electrode layer 520 is 0.01 mm to 0.1 mm. Further, the thickness of the electrode layer 520 is 0.01 mm, 0.05 mm or 0.1 mm.

[0032] In one embodiment, the thickness of the PTC thermistor layer 510 is 0.15 mm to 0.45 mm. Further, the thickness of the PTC thermistor layer 510 is 0.15 mm, 0.35 mm or 0.45 mm.

[0033] In one embodiment, the thickness of the explosion-proof component 500 is 0.2 mm to 0.5 mm. Further, the thickness of the explosion-proof component 500 is 0.2 mm, 0.3 mm or 0.5 mm.

[0034] like Figure 1 As shown, in one of the embodiments, one of the electrode layers 520 is attached to a side of the shell 100 away from the cap 300 to increase the contact area between the corresponding electrode layer 520 and the shell 100, thereby improving the connection stability and conduction effect between the corresponding electrode layer 520 and the shell 100.

[0035] like Figure 1 As shown, in one embodiment, the cap 300 includes a support plate 310, a cover plate 320 and an insulating composite layer 330. The periphery of the support plate 310 is connected to the opening of the housing 100. A position avoidance hole 311 is provided at the center of the support plate 310. The cover plate 320 is located on the side of the support plate 310 away from the housing 100. The center of the cover plate 320 is arranged corresponding to the position avoidance hole 311. The insulating composite layer 330 is clamped between the support plate 310 and the cover plate 320. In this embodiment, the insulating composite layer 330 is used to isolate the electrical connection between the support plate 310 and the cover plate 320, that is, the insulating composite layer 330 plays an insulating role. It can be understood that the insulating composite layer 330 can be an insulating glue layer, a silicone layer or other existing insulating structures.

[0036] like Figure 1 As shown, in one embodiment, the cap 300 further includes a connecting post 340, which is inserted into the avoidance hole 311 and fixedly connected to the cover plate 320. In this embodiment, the connecting post 340 is used to electrically connect to the winding core.

[0037] like Figure 1 As shown, in one embodiment, the insulating composite layer 330 is further sandwiched between the connecting pillar 340 and the supporting plate 310 to prevent the connecting pillar 340 from being electrically connected to the supporting plate 310 .

[0038] The present disclosure also provides an electrical product, including the button battery 10 described in any of the above embodiments.

[0039] Compared with the prior art, the present invention has at least the following advantages:

[0040] The resistance value of the PTC thermistor layer 510 increases with the increase of temperature. When the PTC thermistor layer 510 reaches the power-off temperature, the PTC thermistor layer 510 will not be able to conduct, so that the circuit of the button battery 10 is disconnected, so as to avoid the problem of explosion of the button battery 10. When the temperature of the PTC thermistor layer 510 is lower than the power-off temperature, the PTC thermistor layer 510 will be turned on again, so that the button battery 10 can still continue to supply power, avoiding the button battery 10 from irreversible damage after overheating, so that the button battery 10 can continue to supply power after eliminating the overheating problem.

[0041] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A button battery, comprising a shell and a cap, wherein the shell is formed with a receiving groove, and the cap is covered on the shell, characterized in that: The button battery also includes an explosion-proof component, which includes a PTC thermistor layer and an electrode layer. The number of the electrode layers is two, and the two electrode layers are respectively connected to the two opposite side surfaces of the PTC thermistor layer, and one of the electrode layers is also connected to a side of the shell facing away from the cap.

2. The button battery according to claim 1, characterized in that: The electrode layer is a nickel-plated layer.

3. The button battery according to claim 1, characterized in that: The thickness of the electrode layer is 0.01 mm to 0.1 mm.

4. The button battery according to claim 1, characterized in that: The thickness of the PTC thermistor layer is 0.15 mm to 0.45 mm.

5. The button battery according to claim 1, characterized in that: The thickness of the explosion-proof component is 0.2 mm to 0.5 mm.

6. The button battery according to claim 1, characterized in that: One of the electrode layers is attached to a side surface of the shell facing away from the cap.

7. The button battery according to claim 1, characterized in that: The cap includes a support plate, a cover plate and an insulating composite layer. The periphery of the support plate is connected to the opening of the shell, and a avoidance hole is opened at the center of the support plate. The cover plate is located on the side of the support plate away from the shell, and the center of the cover plate is arranged corresponding to the avoidance hole. The insulating composite layer is clamped between the support plate and the cover plate.

8. The button battery according to claim 7, characterized in that: The cap further comprises a connecting column, the connecting column is passed through the avoidance hole, and the connecting column is fixedly connected to the cover plate.

9. The button battery according to claim 8, characterized in that: The insulating composite layer is also clamped between the connecting column and the supporting plate.

10. An electrical product, characterized in that: A button battery comprising the button battery according to any one of claims 1 to 9.

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