CN217740463U

CN217740463U - Temperature fuse, temperature fuse assembly, battery and electronic equipment

Info

Publication number: CN217740463U
Application number: CN202220537219.5U
Authority: CN
Inventors: 易云
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-11-04
Anticipated expiration: 2032-03-11

Abstract

The application relates to the technical field of fuses and discloses a temperature fuse, a temperature fuse assembly, a battery and an electronic device. The temperature fuse comprises a shell, a first pin and a second pin. The shell is provided with a first end face and a second end face which are opposite to each other along the length direction of the shell. The first pin is arranged on the shell, and one end of the first pin extends out of the shell from the first end face. The second pin is arranged on the shell, and one end of the second pin extends out of the shell from the position between the first end face and the second end face. One of the first pin and the second pin forms an input end of the temperature fuse, and the other pin forms an output end. In the temperature fuse provided by the embodiment of the application, the first pin is led out from one end of the length direction of the shell, and the second pin is led out from the middle position of the length direction of the shell. Thus, the size of the thermal fuse in the length direction is small; namely, the present situation that the size of the current thermal fuse in the longitudinal direction of the case is large can be improved.

Description

Temperature fuse, temperature fuse assembly, battery and electronic equipment

[ technical field ] A

The application relates to the technical field of fuses, in particular to a temperature fuse, a temperature fuse assembly, a battery and electronic equipment.

[ background ] A method for producing a semiconductor device

The thermal fuse, also called a thermal fuse (or TCO), is capable of sensing overheating occurring during abnormal operation of the electric and electronic products, thereby breaking a circuit to prevent a fire. Generally, a thermal fuse includes a housing, a first pin, a second pin, and a circuit breaking element. One end of the first pin is fixed on the shell, and the other end of the first pin extends out of one end of the shell in the length direction; one end of the second pin is fixed on the shell, the other end of the second pin extends out of the other end of the shell in the length direction, and the second pin is connected with the first pin. The circuit breaking element is arranged on the shell and is used for cutting off the physical connection relation between the first pin and the second pin when the temperature is equal to or higher than a preset threshold value; the circuit breaking element may be a bimetal or the like.

The inventor of the application finds out in the process of realizing the application that: the size of the current thermal fuse in the direction along the length of the case is large, and this makes it difficult to apply it to small electronic products.

[ Utility model ] content

The application aims at providing a temperature fuse, a temperature fuse component, a battery and electronic equipment to improve the current situation that the size of the current temperature fuse in the length direction of a shell is large.

In order to solve the technical problem, the following technical scheme is adopted:

a temperature fuse comprises a shell, a first pin and a second pin. The shell is provided with a first end face and a second end face which are opposite to each other along the length direction of the shell. The first pin is mounted on the shell, and one end of the first conductive part extends out of the shell from the first end face. The second pin is arranged on the shell, and one end of the first conductive part extends out of the shell from the position between the first end face and the second end face. One of the first pin and the second pin forms an input end of the temperature fuse, and the other one forms an output end of the temperature fuse.

In the temperature fuse provided by the embodiment of the application, the first pin is led out from one end of the shell in the length direction, and the second pin is led out from the middle position of the shell in the length direction. Therefore, compared with the mode that the first pin and the second pin are respectively led out from the two ends of the shell along the length direction in the temperature fuse in the current market, the size of the temperature fuse in the length direction is smaller. That is, the temperature fuse provided by the embodiment of the application can improve the current situation that the size of the current temperature fuse in the length direction of the shell is large.

In some embodiments, the first pin includes a first connection portion fixed to the housing and a second connection portion located outside the housing, the second connection portion has a first center line, and the first center line passes through a midpoint of one end of the second connection portion close to the housing and a midpoint of one end of the second connection portion away from the housing, when viewed in a direction perpendicular to the second connection portion. The second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, the fourth connecting part is provided with a second central line, and the second central line passes through a midpoint of one end, close to the shell, of the fourth connecting part and a midpoint of one end, deviated from the shell, of the fourth connecting part when the fourth connecting part is observed in the direction perpendicular to the fourth connecting part. An included angle theta is formed between the first central line and the second central line, and theta is more than or equal to 60 degrees and less than or equal to 150 degrees. The arrangement aims to avoid the interference between the second connecting part and the fourth connecting part due to the excessively small included angle.

In some embodiments, the thermal fuse includes a first pin, a second pin, and a bimetal strip. The first pin comprises a first connecting part fixed on the shell and a second connecting part positioned outside the shell. The second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, and the third connecting part and the first connecting part are oppositely arranged. The bimetallic strip is arranged on the shell and is positioned between the first connecting part and the third connecting part. When the temperature of the bimetallic strip is lower than a preset threshold value, the first connecting part is in contact connection with the third connecting part; when the temperature of the bimetallic strip is higher than the preset threshold value, the bimetallic strip deforms to push against one of the third connecting part and the first connecting part, so that the third connecting part and the first connecting part are separated.

In some embodiments, the temperature fuse further comprises a positive temperature coefficient thermistor. The positive temperature coefficient thermistor is arranged between the first pin and the bimetallic strip and connected with the first connecting part. When the temperature of the bimetallic strip is higher than the preset threshold value, the first connecting part, the positive temperature coefficient thermistor, the bimetallic strip and the third connecting part are sequentially connected. Since the PTC has a larger resistance when the temperature reaches the predetermined threshold, for example, in some embodiments, the resistance of the PTC is 20K Ω, the first pin and the second pin are approximately in an open circuit state.

In some embodiments, the temperature fuse includes a first pin, a second pin, a bimetal, and a positive temperature coefficient thermistor. The first pin comprises a first connecting part fixed on the shell and a second connecting part positioned outside the shell. The second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, and the third connecting part and the first connecting part are oppositely arranged. The bimetallic strip is arranged on the shell and is positioned between the first connecting part and the second connecting part. The positive temperature coefficient thermistor is arranged between the second pin and the bimetallic strip and connected with the third connecting part. When the temperature of the bimetallic strip is lower than a preset threshold value, the first connecting part is in contact connection with the third connecting part. When the temperature of the bimetallic strip is higher than the preset threshold value, the bimetallic strip deforms to push against the first connecting part, so that the first connecting part is separated from the third connecting part.

In some embodiments, the housing further has a third end face and a fourth end face oppositely disposed along a second direction, the second direction being perpendicular to the first direction. The third connecting portion comprises a first connecting unit and a second connecting unit, the first connecting unit extends along the first direction, and the second connecting unit extends to the third end face from the edge, close to the third end face, of the first connecting unit. Thus, the third connecting portion may have a T-shape, an L-shape, an F-shape, a cross-shape, a letter-soil shape, or the like.

In some embodiments, the second pin is T-shaped, L-shaped, F-shaped, cross-shaped, or earth-shaped.

a temperature fuse component comprises the temperature fuse, a first conductive piece and a second conductive piece. The first conductive piece is connected to the first pin, and the second conductive piece is connected to the second pin. The first conductive piece and the second conductive piece are both used for being connected with an external electronic element, so that the temperature fuse can be connected into a circuit. Due to the fact that the temperature fuse is included, the temperature fuse assembly can improve the current situation that the size of the current temperature fuse assembly in the length direction of the shell is large.

In some embodiments, the first conductive member includes a base portion connected to a portion of the first pin extending out of the housing, and an extension portion connected to the base portion and extending in the second direction, which is perpendicular to the first direction. The second conductive member extends along the second direction. The first conductive member, the temperature fuse and the second conductive member form a U-shaped structure.

In some embodiments, the first conductive member, the temperature fuse and the second conductive member together define a U-shaped structure; or the first conductive member, the temperature fuse and the second conductive member jointly form an L-shaped structure.

a battery comprises a tab and the temperature fuse, wherein the tab is electrically connected to the first pin or the second pin. Or, the battery comprises a tab and the temperature fuse component, wherein the tab is electrically connected to the first conductive piece or the second conductive piece. Due to the fact that the temperature fuse is included, the temperature fuse assembly can improve the current situation that the size of the current temperature fuse assembly in the length direction of the shell is large.

In order to solve the technical problem, the following technical scheme is also adopted:

an electronic device comprises the temperature fuse or the temperature fuse component or the battery. Due to the fact that the temperature fuse is included, the temperature fuse assembly can improve the current situation that the size of the current temperature fuse assembly in the length direction of the shell is large.

[ description of the drawings ]

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

FIG. 1 is a schematic diagram of one direction of a thermal fuse according to one embodiment of the present application;

FIG. 2 isbase:Sub>A cross-sectional view of the temperature fuse shown in FIG. 1 along line A-A when the first lead contacts the second lead;

FIG. 3 isbase:Sub>A cross-sectional view of the thermal fuse of FIG. 1 taken along line A-A when the first lead is separated from the second lead;

FIG. 4 is a schematic view of one direction of the second lead of FIG. 1;

FIG. 5 is a schematic view showing one direction of a thermal fuse in the related art;

FIG. 6 is a schematic diagram of a thermal fuse assembly according to one embodiment of the present application;

FIG. 7 is a schematic view of a thermal fuse assembly provided in accordance with another embodiment of the present application;

FIG. 8 is a schematic diagram of a battery provided by one embodiment of the present application;

fig. 9 is a schematic view of an electronic device according to an embodiment of the application.

In the figure:

1. a temperature fuse;

100. a housing; 110. a base shell; 120. a cover; 101. a first end face; 102. a second end face; 103. a third end face; 104. a fourth end face;

200. a first pin; 210. a first connection portion; 220. a second connecting portion;

300. a second pin; 310. a third connecting part; 320. a fourth connecting portion; 311. a first connecting unit; 312. a second connection unit;

400. a bimetal;

500. a positive temperature coefficient thermistor;

1b, a temperature fuse; 100b, a housing; 200b, a first pin; 300b, a second pin;

2. a temperature fuse assembly; 21. a first conductive member; 22. a second conductive member; 21m, a base; 21n, an extension;

2b, a temperature fuse component; 21b, a first conductive member; 22b, a second conductive member;

3. a battery; 31. an electrochemical device; 31m, pole lugs;

4. an electronic device.

[ detailed description ] embodiments

To facilitate an understanding of the present application, the present application is described in more detail below with reference to the figures and the detailed description. It should be noted that when an element is referred to as being "fixed to" or "affixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

In this specification, the term "mount" includes welding, screwing, clipping, adhering, etc. to fix or restrict a certain element or device to a specific position or place, the element or device may be fixed or movable in a limited range in the specific position or place, and the element or device may be dismounted or not dismounted after being fixed or restricted to the specific position or place, which is not limited in the embodiment of the present application.

Referring to fig. 1 to 2, which respectively showbase:Sub>A schematic view ofbase:Sub>A direction ofbase:Sub>A thermal fuse 1 andbase:Sub>A schematic view ofbase:Sub>A cut alongbase:Sub>A linebase:Sub>A-base:Sub>A according to an embodiment of the present disclosure, the thermal fuse 1 includesbase:Sub>A housing 100,base:Sub>A first lead 200 andbase:Sub>A second lead 300. The housing 100 is a mounting base of the remaining structure in the thermal fuse 1, and has a first end surface 101 and a second end surface 102 opposite to each other along a first direction X; wherein, the "first direction" mentioned in the present document is a length direction of the housing. The first lead 200 is mounted on the housing 100, and one end thereof protrudes from the housing 100 through the first end surface 101. The second lead 300 is mounted on the housing 100, and one end thereof extends out of the housing 100 from between the first end surface 101 and the second end surface 102. One of the first pin 200 and the second pin 300 constitutes an input terminal of the thermal fuse 1, and the other constitutes an output terminal of the thermal fuse.

Referring to fig. 1 and 2, the housing 100 is a mounting support structure with the first lead 200 and the second lead 300. In this embodiment, the housing 100 includes a base shell 110 and a cover 120 disposed opposite to each other. The base case 110 has an overall rectangular box-shaped structure having a cavity at a side facing the cover 120. The cover 120 covers the opening of the first cavity to seal the cavity; the cover 120 and the base housing 110 together define a receiving space 105 for receiving and mounting at least a portion of the first lead 200 and at least a portion of the second lead 300. Of course, in other embodiments of the present application, the cover 120 may also be provided with a cavity, which is not specifically limited in the present application as long as the housing 100 is ensured to have the receiving space 105. The housing 100 has a first end surface 101 and a second end surface 102 disposed opposite to each other along a first direction X, and a third end surface 103 and a fourth end surface 104 disposed opposite to each other along a second direction Y; the "second direction" described in this document is a direction perpendicular to the first direction X. It is to be understood that, even though the housing 100 is in a rectangular parallelepiped shape in the present embodiment, the present application is not limited thereto; in other embodiments of the present application, the housing 100 may have other shapes such as a pentagonal prism, a hexagonal prism or a cylinder. It should be noted that, when the housing 100 is cylindrical, it still has the first end surface 101 and the second end surface 102, but does not have the third end surface 103 and the fourth end surface 104.

With reference to the first lead 200, please continue to refer to fig. 2, the first lead 200 is an integral sheet structure including a first connection portion 210 and a second connection portion 220. The first connecting portion 210 is fixed to the base shell 110 of the housing 100, and at least a portion of the first connecting portion is exposed to the accommodating space 105. The second connection portion 220 is connected to the first connection portion 210, which is located outside the housing 100; the second connection portion 220 is used for connecting with an external electronic component. The second connection portion 220 has a first centerline; the first center line passes through a midpoint of one end of the second connection portion 220 close to the case 100 and a midpoint of one end facing away from the case 100, as viewed in a direction perpendicular to the second connection portion 220.

Referring to fig. 4, a schematic view of one direction of the second lead 300 is shown, and in conjunction with fig. 1 and fig. 2, the second lead 300 is also a sheet structure including a third connecting portion 310 and a fourth connecting portion 320. Wherein, the third connecting part is integrally positioned in the casing 100 and fixed to the casing 100; at least a part of the third connecting portion 310 is accommodated in the accommodating space 105. The third connecting portion 310 is disposed opposite to the first connecting portion 210; when the third connection portion 310 contacts the first connection portion 210, the thermal fuse 1 is in a closed state, and when the third connection portion 310 is released from the first connection portion 210, the thermal fuse 1 is in an open state or a nearly open state with a large resistance. In this embodiment, the third connecting portion 310 includes a first connecting unit 311 and a second connecting unit 312; the first connecting unit 311 extends along the first direction X, and the second connecting unit 312 extends from an edge of the first connecting unit 311 close to the third end surface 103. Alternatively, the third connection portion 310 has a T-shape as shown in fig. 4. It is understood that, in other embodiments of the present application, the applicant may also adapt the shape of the third connecting portion 310 based on the above description; for example, in other embodiments of the present application, the third connecting portion 310 may also have an L shape, an F shape, a cross shape, a letter shape, and the like. The fourth connecting portion 320 is connected to one end of the third connecting portion 310 close to the surface of the casing 100, and is located outside the casing 100; the fourth connection portion 320 is used for connecting with an external electronic component. Similarly, the pin 300 formed by the fourth connection portion 320 and the third connection portion 310 may also be in a shape of T, L, F, cross, or zigzag, which is not limited in this application. The fourth connection portion 320 has a second center line passing through a midpoint of one end of the fourth connection portion 320 close to the case 100 and a midpoint of one end away from the case 100, as viewed in a direction perpendicular to the fourth connection portion 320. An included angle θ is formed between the second central line and the first central line, and in order to prevent the second connecting portion 220 and the fourth connecting portion 320 from interfering due to too small included angle, the included angle θ satisfies: theta is more than or equal to 60 degrees and less than or equal to 150 degrees. Preferably, θ =90 °. One of the second pin 300 and the first pin 200 forms an input end of a thermal fuse, and the other forms an output end of the thermal fuse, so that the circuit can be conveniently accessed.

In addition, the thermal fuse 1 further includes a bimetal 400, wherein the bimetal 400 is configured to push one of the first connecting portion 210 and the third connecting portion 310 when the temperature is higher than a preset threshold, so as to separate the first connecting portion 210 from the third connecting portion 310. Specifically, please refer to fig. 2, in conjunction with the remaining figures, the bimetal strip 400 is accommodated in the accommodating space 105 and located between the first connecting portion 210 and the third connecting portion 310. The bi-metallic strip 400 is a composite sheet of at least two metals or other materials having suitable properties; the device comprises an active layer and a passive layer with different thermal expansion coefficients, wherein the deformation rate of the active layer is greater than that of the passive layer; thereby causing the bi-metallic strip 400 to bend to one side when the temperature is above a certain threshold.

In this embodiment, the distance between the edge of the bimetal 400 and the third connecting portion 310 at normal temperature is greater than the distance between the central region of the bimetal 400 and the third connecting portion 310. Specifically, referring to fig. 2, when the temperature is lower than the preset threshold, the first connection portion 210 is in contact connection with the third connection portion 310; the bimetal strip 400 is disposed to protrude toward the third connecting portion 310, or disposed to be recessed toward the third connecting portion 310, but the third connecting portion 310 is not pushed to be separated from the first connecting portion 210. Referring to fig. 3, which showsbase:Sub>A cross-sectional view along the linebase:Sub>A-base:Sub>A when the first lead 200 is separated from the second lead 300, when the temperature is higher than the predetermined threshold, the bimetal strip 400 is deformed to push against the third connecting portion 310, so that the third connecting portion 310 is separated from the first connecting portion 210. It should be noted that the "preset threshold" mentioned in the present application means that the bimetal 400 pushes the third connecting portion 310 to a temperature value just separated from the first connecting portion 210.

In some embodiments, the thermal fuse 1 further includes a Positive Temperature Coefficient thermistor (PTC) 500. Specifically, with reference to fig. 2 and 3, the ptc device 500 is accommodated in the accommodating space 105 and disposed between the first connecting portion 210 of the first lead 200 and the bimetal strip 400; the PTC 500 is connected to the first connection portion 210. When the temperature of the bimetal 400 is higher than the preset threshold, the bimetal 400 deforms to be concave towards the third connection portion 310 as shown in fig. 3, so as to push away the third connection portion 310; at this time, the bimetal 400 is simultaneously connected to the third connection part 310 and the PTC 500. Thereby, the first connection part 210, the PTC 500, the bimetal 400, and the third connection part 310 are sequentially connected; since the PTC 500 has a larger resistance when the temperature reaches the predetermined threshold, for example, in some embodiments, the resistance of the PTC 500 is 20K Ω, the first pin 200 and the second pin 300 are approximately in an open circuit state.

It should be noted that, even though the first connection portions 210 of the first pins 200 are fixed relative to the housing 100 and the third connection portions 310 of the second pins 300 are movable relative to the housing 100 in the above embodiment, the working principle of the thermal fuse 1 is described, but the present application is not limited thereto; as long as it is ensured that when the temperature of the bimetal 400 is higher than the preset threshold, one of the first connecting portion 210 and the third connecting portion 310 can be pushed to separate the first connecting portion 210 from the third connecting portion 310. For example, in some other embodiments of the present disclosure, the first connecting portion 210 is movable relative to the housing 100, and the third connecting portion 310 is fixed relative to the housing 100, and the two are disposed oppositely; the bimetal strip 400 is disposed between the first connection portion 210 and the third connection portion 310; the PTC 500 is provided between the third connection part 310 of the second pin 300 and the bimetal strip 400. When the temperature of the bimetal 400 is lower than the preset threshold, the first connection portion 210 is in contact connection with the third connection portion 310; when the temperature of the bimetal strip 400 is higher than the predetermined threshold, the bimetal strip 400 deforms to push against the first connection portion 210, so that the first connection portion 210 and the third connection portion 310 are separated from each other.

Next, the advantageous effects of the thermal fuse 1 provided in the embodiment of the present application will be described with reference to the structure of the thermal fuse 1b in the related art.

Fig. 5 shows a schematic diagram of a temperature fuse 1b in the related art, in which the temperature fuse 1b includes a housing 100b, a first pin 200b, a second pin 300b, and a bimetal (not shown) for timely cutting off the connection between the first pin 200b and the second pin 300 b. One end of the first pin 200b is fixed to the housing, and the other end thereof extends out from one end of the housing 100b in the length direction; one end of the second pin 300b is fixed to the housing, and the other end thereof protrudes from the other end of the housing 100b in the longitudinal direction. The thermal fuse 1b has a large dimension in the longitudinal direction of the case 100b, and is not convenient for use in small electronic products such as micro batteries.

In contrast, in the thermal fuse 1 provided in the embodiment of the present application, the second connection portion 220 of the first pin 200 extends from one end of the housing 100 in the length direction, and the second pin 300 extends from between two end surfaces of the housing 100 in the length direction; accordingly, the thermal fuse 1 occupies a small size in the longitudinal direction of the case 100, which is advantageous for the application of the thermal fuse 1 to a small electronic product. That is, the thermal fuse 1 according to the embodiment of the present application can improve the current situation that the size of the current thermal fuse in the longitudinal direction is large.

In addition, since the first lead 200b and the second lead 300b are disposed opposite to each other in the housing 100, that is, the first lead and the second lead need to overlap each other in the first direction X, the path length L for the electrons to flow in the housing 100b _b Is substantially L ₁₁ (ii) a Wherein L is ₁₁ Is the length of the housing 100 b. In contrast, in the thermal fuse 1 according to the embodiment of the present application, when the fourth connection portion 320 extends from the middle position of the housing 100, the path length L of the electrons that need to flow in the housing 100 is substantially (L) ₁₁ +L ₁₂ ) 2; wherein L is ₁₁ Is the length of the housing 100 in the first direction X, L ₁₂ Is a width of the housing 100 in the second direction Y. Due to (L) ₁₁ +L ₁₂ )/2＜L ₁₁ Therefore, the arrangement of the second pin 300 led out from the middle of the housing 100 is also beneficial to reducing the internal resistance of the thermal fuse 1, and is further beneficial to improving the capability of supporting specific discharge power.

Based on the same inventive concept, the application also provides a temperature fuse component. Specifically, referring to fig. 6, which shows a schematic view of the thermal fuse assembly 2, referring to fig. 1 to 5, the thermal fuse assembly 2 includes the thermal fuse 1, the first conductive member 21, and the second conductive member 22 provided in any one of the embodiments; the first conductive member 21 is connected to the first pin 200, the second conductive member 22 is connected to the second pin 300, and both the first conductive member 21 and the second conductive member 22 are used for connecting with external electronic components, so that the thermal fuse 1 can be connected to a circuit.

Specifically, the first conductive member 21 includes a base portion 21m and an extension portion 21n. The base 21m is connected to a portion of the first pin 200 extending out of the housing 100, and the extension 21n is connected to the base 21m and extends along the second direction Y. Alternatively, one end of the extension 21n close to the base 21m points in a direction away from one end of the base 21m, which is the same as the direction in which the fourth end surface 104 points to the third end surface 103. One end of the second conductive member 22 is connected to the portion of the second pin 300 extending out of the housing 100, and the other end extends along the second direction Y. The first conductive member 21, the thermal fuse 1 and the second conductive member 22 together form a U-shaped structure.

The thermal fuse assembly 2 can improve the current situation that the size of the current thermal fuse assembly in the longitudinal direction of the housing is large due to the inclusion of the thermal fuse 1.

In addition, the distal ends of the first conductive member 21 and the second conductive member 22 are used for connecting with external electronic components; compared with the prior art in which the second pin 300 extends from the end of the housing 100 in the length direction, the second pin 300 in the embodiment extends out of the housing 100 in the second direction Y, so that when the electronic component connected to the second conductive member 22 is located at the same distance from the third end surface 103 of the housing 100, fewer sheets are required for the second conductive member 22 in the thermal fuse assembly 2. That is to say, the thermal fuse assembly 2 provided in the embodiment of the present application is beneficial to reduce the usage of the second conductive member 22, so as to reduce the manufacturing cost.

It should be understood that, even though the first conductive member 21, the thermal fuse 1 and the second conductive member 22 are taken as an example to form a U-shaped structure together in the above embodiment, the thermal fuse assembly 2 is described, but the application is not limited thereto; the shapes of the first conductive member 21 and the second conductive member 22 can be flexibly changed, and the structure of the thermal fuse assembly 2 is correspondingly changed. For example, fig. 7 shows a schematic diagram of a temperature fuse assembly 2b provided in another embodiment of the present application, where the temperature fuse assembly 2b still includes the temperature fuse 1, the first conductive member 21b, and the second conductive member 22b. The main difference between the thermal fuse assembly 2b and the thermal fuse assembly 2 in the above embodiment is that: the first conductive member 21b extends along the first direction X, so that the first conductive member 21b, the thermal fuse 1 and the second conductive member 22b form an L-shaped structure.

Based on the same inventive concept, the application also provides a battery. Referring to fig. 8, which shows a schematic diagram of the battery 3, and referring to fig. 1 to fig. 7, the battery 3 includes an electrochemical device 31 and a thermal fuse assembly (the thermal fuse assembly 2 or the thermal fuse assembly 2 b) provided in any of the above embodiments, and the battery 3 including the electrochemical device 31 and the thermal fuse assembly 2 is described as an example.

The electrochemical device 31 is a device that converts external energy into electric energy and stores the electric energy in the device to supply power to an external device (e.g., a portable electronic device) at a desired time; which includes a case (not shown), an electrode assembly (not shown) accommodated in the case, a tab 31m, and an electrolyte. One of the first conductive member 21 or the second conductive member 22 of the thermal fuse assembly 2 is electrically connected to the tab 31m, and the other is used for electrical connection to an external circuit board. In this way, when the temperature fuse assembly 2 senses that the temperature is higher than the predetermined threshold, the first pin 200 and the second pin 300 therein are disconnected, so that the electrochemical device 31 and the circuit board are disconnected or only a very small current exists.

The battery 3 can improve the current situation that the size of the temperature fuse component in the length direction of the shell in the current battery is large due to the temperature fuse 1.

In other embodiments of the present application, the battery 3 may also include only the thermal fuse 1, and does not include the first conductive member 21 and the second conductive member 22; at this time, the tab 31m is connected to one of the first lead 200 and the second lead 300.

Based on the same inventive concept, the application also provides the electronic equipment. Referring to fig. 9, which is a schematic diagram of the electronic device 4, and referring to fig. 1 to 8, the electronic device 4 includes the battery 3 and the load structure powered by the electrochemical device in any of the embodiments described above. In this embodiment, the electronic device 4 includes a mobile phone; it is understood that in other embodiments of the present application, the electronic device may also be a tablet computer, a drone, or other devices driven by electric power.

The electronic device 4 can improve the current situation that the size of the temperature fuse in the length direction of the shell is large in the current electronic device because the temperature fuse 1 is included.

Further, even if the temperature fuse 1 (or the temperature fuse block 2) is applied to a battery in the present embodiment, the battery is applied to an electronic device; however, in other embodiments of the present application, the thermal fuse 1 (or the thermal fuse assembly 2) may also be directly applied to the electronic device, i.e., the electronic device includes the thermal fuse 1 (or the thermal fuse assembly 2).

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A thermal fuse, comprising:

the shell is provided with a first end face and a second end face which are opposite along a first direction, and the first direction is the length direction of the shell;

the first pin is arranged on the shell, and one end of the first pin extends out of the shell from the first end face; and

the second pin is arranged on the shell, and one end of the second pin extends out of the shell from the position between the first end face and the second end face;

one of the first pin and the second pin forms an input end of the temperature fuse, and the other one forms an output end of the temperature fuse.

2. The thermal fuse according to claim 1, wherein:

the first pin comprises a first connecting part fixed on the shell and a second connecting part positioned outside the shell, the second connecting part is provided with a first central line, and the first central line passes through the middle point of one end, close to the shell, of the second connecting part and the middle point of one end, far away from the shell, of the second connecting part when the second connecting part is observed along the direction perpendicular to the second connecting part;

the second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, the fourth connecting part is provided with a second central line, and the second central line passes through the middle point of one end, close to the shell, of the fourth connecting part and the middle point of one end, far away from the shell, of the fourth connecting part when the fourth connecting part is observed along the direction perpendicular to the fourth connecting part;

an included angle theta is formed between the first central line and the second central line, and theta is more than or equal to 60 degrees and less than or equal to 150 degrees.

3. The thermal fuse of claim 1, wherein the thermal fuse comprises:

the first pin comprises a first connecting part fixed on the shell and a second connecting part positioned outside the shell;

the second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, and the third connecting part and the first connecting part are arranged oppositely; and

the bimetallic strip is arranged on the shell and positioned between the first connecting part and the third connecting part;

when the temperature of the bimetallic strip is lower than a preset threshold value, the first connecting part is in contact connection with the third connecting part;

when the temperature of the bimetallic strip is higher than the preset threshold value, the bimetallic strip deforms to push one of the third connecting part and the first connecting part so as to separate the third connecting part from the first connecting part.

4. The thermal fuse of claim 3, further comprising a positive temperature coefficient thermistor;

the positive temperature coefficient thermistor is arranged between the first pin and the bimetallic strip and is connected with the first connecting part;

when the temperature of the bimetallic strip is higher than the preset threshold value, the first connecting part, the positive temperature coefficient thermistor, the bimetallic strip and the third connecting part are sequentially connected.

5. The thermal fuse of claim 1, comprising:

the second pin comprises a third connecting part fixed on the shell and a fourth connecting part positioned outside the shell, and the third connecting part and the first connecting part are oppositely arranged;

the bimetallic strip is arranged on the shell and positioned between the first connecting part and the second connecting part; and

the positive temperature coefficient thermistor is arranged between the second pin and the bimetallic strip and is connected with the third connecting part;

when the temperature of the bimetallic strip is higher than the preset threshold value, the bimetallic strip deforms to push against the first connecting part, so that the first connecting part and the third connecting part are separated.

6. The thermal fuse according to any one of claims 2 to 5, wherein the housing further has a third end face and a fourth end face oppositely disposed in a second direction, the second direction being perpendicular to the first direction;

the third connecting portion comprises a first connecting unit and a second connecting unit, the first connecting unit extends along the first direction, and the second connecting unit extends from the edge, close to the third end face, of the first connecting unit to the third end face.

7. A temperature fuse according to any one of claims 1 to 5 wherein the second leg is T-shaped, L-shaped, F-shaped, cross-shaped or earth-shaped.

8. A temperature fuse assembly, comprising:

the temperature fuse according to any one of claims 1 to 7;

the first conductive piece is connected to the first pin; and

and the second conductive piece is connected to the second pin.

9. The thermal fuse assembly of claim 8, wherein:

the first conductive member comprises a base part and an extension part, the base part is connected with the part of the first pin extending out of the shell, the extension part is connected with the base part and extends along a second direction, and the second direction is perpendicular to the first direction;

the second conductive member extends along the second direction.

10. The thermal fuse assembly of claim 8, wherein:

the first conductive piece, the temperature fuse and the second conductive piece jointly form a U-shaped structure; or,

the first conductive piece, the temperature fuse and the second conductive piece jointly form an L-shaped structure.

11. A battery including tabs, the battery further comprising:

the thermal fuse according to any one of claims 1 to 7, said tab electrically connecting said first pin or said second pin; or,

the thermal fuse assembly of any one of claims 8-10, said tab electrically connecting said first or second electrically conductive members.

12. An electronic device, comprising:

the temperature fuse according to any one of claims 1 to 7; or,

a temperature fuse assembly as claimed in any one of claims 8 to 10; or,

the battery of claim 11.