CN220914141U - Temperature circuit breaker, battery and electric device - Google Patents

Abstract

The utility model discloses a temperature breaker, a battery and an electric device, wherein the temperature breaker comprises: a housing, two conductive sheets and a heat sensitive assembly. The two conductive sheets are movably arranged in the shell in a central symmetry manner, one ends of the two conductive sheets respectively extend out of the shell to form a connecting terminal, and each conductive sheet is provided with a contact part in the direction facing the other conductive sheet and is abutted with the other conductive sheet through the contact part. The heat-sensitive component is arranged in the shell and clamped between the two conductive sheets, and is configured to be capable of being deformed by heating; before the thermosensitive assembly is deformed by heating, the contact part of each conducting strip is abutted with the other conducting strip; after the heat sensitive component is deformed by heating, the contact part of each conductive sheet is separated from the other conductive sheet. The temperature circuit breaker provided by the utility model has better stability and safety.

Description

Temperature circuit breaker, battery and electric device

Technical Field

The utility model relates to the technical field of temperature circuit breakers, in particular to a temperature circuit breaker, a battery and an electric device.

Background

The inside of the recoverable temperature circuit breaker is usually a contact connection, i.e. a circuit is conducted by a movable contact in contact with a stationary contact, and when the current is excessive, the movable contact moves and separates from the stationary contact to open the circuit. The falling of the electric device or the battery may occur in the daily use process, and at the moment when the battery falls to a sudden stop, the movable contact in the battery continuously moves downwards under the inertia action, so that the movable contact is separated from the stationary contact for a short time, and the power supply current of the battery is interrupted.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the temperature circuit breaker which can have better stability and safety.

The utility model also provides a battery with the temperature circuit breaker.

The utility model also provides an electric device with the battery.

A temperature circuit breaker according to an embodiment of the present utility model includes: a housing; the two conductive sheets are movably arranged in the shell in a central symmetry manner, one ends of the two conductive sheets respectively extend out of the shell to form a connecting terminal, and each conductive sheet is provided with a contact part in the direction facing the other conductive sheet and is abutted with the other conductive sheet through the contact part; the heat-sensitive component is arranged in the shell and clamped between the two conductive sheets, and is configured to be capable of being deformed by heating; before the heat sensitive component is deformed by heating, the contact part of each conducting plate is abutted with the other conducting plate; after the thermosensitive assembly is deformed by heating, the contact part of each conductive sheet is separated from the other conductive sheet.

According to the temperature circuit breaker of the embodiment of the utility model, two conductive sheets which are symmetrical in center are arranged in the shell, and each conductive sheet is provided with a contact part in the direction towards the other conductive sheet and is abutted with the other conductive sheet through the contact part. Before the thermal sensitive component is deformed by heating, the current can be ensured to smoothly pass through the temperature breaker, and the reliability of the temperature breaker is ensured.

In some embodiments, the conductive sheet is formed with a protrusion protruding toward the other conductive sheet, the protrusion being formed as the contact portion.

In some embodiments, the two conductive sheets are a first conductive sheet and a second conductive sheet, respectively, and the heat sensitive assembly comprises: the deformation piece is clamped between the thermistor and the second conductive sheet, and is provided with an initial state and a heated state, when the deformation piece is heated and deformed, the deformation piece is converted into the heated state from the initial state, the deformation piece is provided with a threshold temperature, and the deformation piece deforms at the threshold temperature; wherein when the temperature of the deformation member is less than the threshold temperature, the deformation member is in an initial state, the deformation member is spaced apart from the second conductive sheet, or the deformation member is in contact with the second conductive sheet but does not move the second conductive sheet in a direction away from the first conductive sheet; when the temperature of the deformation piece is greater than or equal to the threshold temperature, the deformation piece is in a heated state, and the deformation piece abuts against the second conductive sheet and pushes the second conductive sheet to move towards the direction deviating from the first conductive sheet.

Further, the shape of the deformation piece is arc-shaped, when the deformation piece is in an initial state, an opening of the deformation piece faces the thermistor, and the orthographic projection of the thermistor on the deformation piece is positioned in the opening range of the deformation piece; when the deformation piece reaches a threshold temperature, an opening of the deformation piece faces the second conductive sheet.

Further, the deformation member comprises a first deformation layer and a second deformation layer which are arranged in a stacked mode, the second deformation layer is located between the first deformation layer and the thermistor, and the thermal expansion coefficient of the second deformation layer is larger than that of the first deformation layer.

Further, the first conductive sheet is formed with a positioning groove on a surface connected with the thermistor, and the thermistor is connected in the positioning groove.

In some embodiments, the conductive sheet comprises a fixed arm and a movable arm, the movable arm comprising a first bending section, a first movable section, a second bending section and a second movable section connected in sequence; the first bending section is connected with the fixed arm, the thermosensitive assembly is clamped between the first movable sections of the two conducting strips, and the contact part is arranged on the second movable section.

In some embodiments, the conductive sheet is integrally formed by stamping.

In some embodiments, the two conductive sheets are identical in structure.

The battery according to the embodiment of the utility model comprises the temperature breaker in the embodiment.

According to the battery of the embodiment of the utility model, by adopting the temperature circuit breaker of the embodiment, by providing two centrally symmetrical conductive pieces in the case of the temperature circuit breaker, each conductive piece is formed with a contact portion in a direction toward the other conductive piece and is abutted against the other conductive piece through the contact portion. Before the thermal sensitive component is deformed by heating, the current can be ensured to smoothly pass through the temperature breaker, and the reliability of the temperature breaker is ensured.

An electrical device according to an embodiment of the present utility model includes the battery described in the above embodiment.

According to the electric device provided by the embodiment of the utility model, by adopting the battery of the embodiment, the temperature circuit breaker in the battery can ensure that current smoothly passes through the temperature circuit breaker while the temperature circuit breaker plays a role of protecting a circuit, so that the reliability of the battery is ensured.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a temperature circuit breaker according to an embodiment of the utility model, prior to thermal deformation of a thermal sensitive component;

FIG. 2 is a schematic diagram of the temperature circuit breaker of the embodiment of FIG. 1 after thermal deformation of the thermal sensitive assembly;

Fig. 3 is an exploded structural view of a temperature circuit breaker according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the structure shown at A in FIG. 3;

fig. 5 is a schematic structural view of a conductive sheet of the temperature circuit breaker of the embodiment shown in fig. 3.

Reference numerals:

a temperature circuit breaker 100,

A housing 10,

A first conductive sheet 11a, a second conductive sheet 11b,

A contact portion 110, a fixed arm 111, a first bending section 112, a first movable section 113, a second bending section 114, a second movable section 115, a positioning groove 116,

A thermal sensitive component 12, a thermistor 121, a deformation member 122, a first deformation layer 1221, a second deformation layer 1222.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A temperature circuit breaker 100, a battery, and an electrical device according to an embodiment of the present utility model are described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a temperature circuit breaker 100 according to an embodiment of the present utility model includes: a housing 10, two conductive sheets and a heat sensitive assembly 12.

The two conductive plates are movably arranged in the shell 10 in a central symmetry manner, one ends of the two conductive plates respectively extend out of the shell 10 to form a connecting terminal, and each conductive plate is provided with a contact part 110 in the direction facing the other conductive plate and is abutted with the other conductive plate through the contact part 110. The heat-sensitive component 12 is disposed in the housing 10 and sandwiched between two conductive sheets, and the heat-sensitive component 12 is configured to be deformable by heat.

Before the heat sensitive component 12 is deformed by heating, the contact part 110 of each conductive sheet is abutted with the other conductive sheet; after thermal sensitive assembly 12 is deformed by heat, contact portion 110 of each conductive sheet is separated from the other conductive sheet.

It will be appreciated that the temperature circuit breaker 100 is connected to the circuit via the connection terminals on the conductive strips, and the conductive strips are electrically connected to each other via the contact portion 110 before the thermal assembly 12 is deformed by heat, so that a conductive circuit is formed between the conductive strips. When the temperature circuit breaker 100 suddenly decelerates or stops moving in a moving state, for example, a drop or a shake occurs, the housing 10 of the temperature circuit breaker 100 suddenly stops moving, and the two conductive plates move synchronously with the housing 10, that is, the conductive plates also immediately stop moving, and the contact portion 110 of the conductive plates has a tendency to continue moving under the inertia effect. Since the two conductive sheets are arranged in a central symmetry manner, and each conductive sheet is formed with a contact portion 110 in a direction towards the other conductive sheet and is abutted to the other conductive sheet through the contact portion 110, the separation directions of the two conductive sheets and the contact portion 110 abutted to the two conductive sheets are opposite. That is, when the first contact portion 110 and the second contact portion 110 are both moved in the same direction, any one contact portion 110 is separated from the corresponding conductive sheet, and the other contact portion 110 can be held in abutment with the corresponding conductive sheet.

It should be noted that, before the thermal sensitive assembly 12 is deformed by heat, it is ensured that at least two conductive plates can be conducted to each other through one contact portion 110, so as to ensure that current can smoothly flow between the two conductive plates through the contact portion 110 and that current can smoothly pass through the temperature circuit breaker 100. After the thermistor 121 is deformed by heating, the thermal sensitive component 12 can separate the contact portion 110 of each conductive sheet from the other conductive sheet, so that the two conductive sheets are connected and disconnected through the contact portion 110, thereby avoiding the influence of the rise of the circuit temperature on the formation of the battery or the electric device, and ensuring the safety and the service life of the battery or the electric device.

In the temperature circuit breaker 100 of the present application, two conductive plates are provided in a housing 10 to be symmetrical with each other at a center, and each conductive plate is formed with a contact portion 110 in a direction toward the other conductive plate and is abutted against the other conductive plate through the contact portion 110. Before the thermal sensitive component 12 is deformed by heating, the current can be ensured to smoothly pass through the temperature breaker 100, and the reliability of the temperature breaker 100 is ensured.

In some embodiments, as shown in fig. 1-3, the conductive sheet is formed with a protrusion protruding toward the other conductive sheet, the protrusion being formed as a contact 110. Thus, by providing the protrusions formed as the contact portions 110, a receiving gap can be formed between the two conductive sheets, thereby ensuring that the heat-sensitive component 12 can be disposed between the two conductive sheets.

In the present application, the manner in which the projections are formed on the conductive sheet is not limited. For example, the protrusions may be integrally formed on the conductive sheet by punching. As another example. The protrusions may be fixed to the conductive sheet by welding, bonding, or the like.

Further, the bump of each conductive sheet is silver-plated on a side facing the other conductive sheet, or the bump material of each conductive sheet is silver-plated. This ensures that the contact surface between the bump and the other conductive piece is made of silver as a contact medium, and reduces the impedance between the conductive piece and the contact portion 110 when the contact portion 110 is in contact with the conductive piece, thereby reducing the heat generated when a current flows in the contact portion 110.

In some embodiments, as shown in fig. 1-3, the two conductive sheets are a first conductive sheet 11a and a second conductive sheet 11b, respectively, and the thermal assembly 12 includes: the thermistor 121 and the deformation piece 122, the thermistor 121 is electrically connected to the first conductive piece 11a, the deformation piece 122 is clamped between the thermistor 121 and the second conductive piece 11b, the deformation piece 122 has an initial state and a heated state, when the deformation piece 122 is deformed by heating, the deformation piece 122 is converted into the heated state from the initial state, the deformation piece 122 has a threshold temperature, and the deformation piece 122 deforms at the threshold temperature.

Wherein when the temperature of the deforming member 122 is less than the threshold temperature, the deforming member 122 is in an initial state, the deforming member 122 is spaced apart from the second conductive sheet 11b, or the deforming member 122 is in contact with the second conductive sheet 11b but does not move the second conductive sheet 11b in a direction away from the first conductive sheet 11 a; when the temperature of the deformation member 122 is greater than or equal to the threshold temperature, the deformation member 122 is in a heated state, and the deformation member 122 abuts against the second conductive sheet 11b and pushes the second conductive sheet 11b to move in a direction away from the first conductive sheet 11 a.

It can be understood that, among them, the thermistor 121 has a property that the resistance is small at normal temperature and the resistance increases after being heated, and when the temperature of the circuit is lower than the threshold temperature, the resistance of the thermistor 121 is small. And when the temperature of the circuit is higher than the threshold temperature, the deformation sheet is deformed by heating, the contact portion 110 of the second conductive sheet 11b is separated from the first conductive sheet 11a, and the contact portion 110 of the first conductive sheet 11a is separated from the second conductive sheet 11 b. At this time, as shown in fig. 2, the first conductive sheet 11a is electrically connected to the thermistor 121, the deformation member 122 is in contact with the thermistor 121, and the deformation member 122 is in contact with the second conductive sheet 11b, that is, the first conductive sheet 11a, the thermistor 121, the deformation member 122 and the second conductive sheet 11b are connected in series to form a conductive flow path, and since the resistance of the thermistor 121 increases after being heated, the current passing through the conductive flow path is negligible for the battery or the electric device, that is, the circuit equivalent to the battery or the electric device is in an open circuit state, thereby avoiding damage caused by continuous heat generation of the battery or the electric device. Meanwhile, heat is generated when current flows through the thermistor 121, and the heat generated by the thermistor 121 can be transferred to the deformation member 122, so that the deformation member 122 is kept in a deformed state, the temperature circuit breaker 100 can be kept in an open state, and a battery or an electric device can dissipate heat. When the heat generated by the circuit and the heat generated by the thermistor 121 are lower than the heat generated by the deformation of the deformation member 122, the deformation member 122 can restore the initial state, the resistance of the thermistor 121 is reduced, the heat generated by the circuit is reduced, at this time, the heat generated by the circuit is insufficient to deform the deformation member 122 again, and the temperature breaker 100 can be stably connected, so that the damage to the battery or the electric device caused by continuous oscillation of the temperature breaker 100 between the breaking state and the access state is avoided.

Further, the shape of the deformation member 122 is arc, when the deformation member 122 is in the initial state, the opening of the deformation member 122 faces the thermistor 121, and the orthographic projection of the thermistor 121 on the deformation member 122 is located in the opening range of the deformation member 122; when the deformation member 122 reaches the threshold temperature, the opening of the deformation member 122 faces the second conductive sheet 11b.

The threshold temperature is a temperature at which the deformable member 122 is deformed.

It will be appreciated that, as can be appreciated from comparing fig. 1 and 2, when the deforming member 122 is in the initial state, the orthographic projection of the thermistor 121 on the deforming member 122 is located within the opening range of the deforming member 122, the thermistor 121 can limit the position of the deforming member 122 to reduce or avoid the shaking of the deforming member 122 in the housing 10, so that the thermistor 121 can be partially accommodated within the arc range of the deforming member 122, and both ends of the deforming member 122 extend toward the first conductive sheet 11 a; when the deformation member 122 is in the heated state, the opening of the deformation member 122 faces the second conductive sheet 11b, and the opening of the deformation member 122 faces away from the thermistor 121, i.e. the deformation member 122 deforms in a direction facing away from the thermistor 121.

Therefore, when the deformation member 122 is in the heated state and is in the initial state relative to the deformation member 122, the deformation member 122 deforms in a direction away from the thermistor 121, that is, the deformation member 122 moves in a direction away from the first conductive sheet 11a, and when the deformation member 122 abuts against the second conductive sheet 11b, the second conductive sheet 11b is driven to move in a direction away from the first conductive sheet 11 a.

Further, as shown in fig. 4, the deformation member 122 includes a first deformation layer 1221 and a second deformation layer 1222 that are stacked, the second deformation layer 1222 is located between the first deformation layer 1221 and the thermistor 121, and the thermal expansion coefficient of the second deformation layer 1222 is larger than that of the first deformation layer 1221.

Thus, when the deformation member 122 is heated, since the thermal expansion coefficient of the second deformation layer 1222 is larger than that of the first deformation layer 1221, the volume expansion of the second deformation layer 1222 is larger than that of the first deformation layer 1221, so that the deformation layer changes from a shape recessed toward the direction approaching the second conductive sheet 11b to a shape recessed toward the direction approaching the first conductive sheet 11 a.

In some embodiments, as shown in fig. 3, the first conductive sheet 11a is formed with a positioning groove 116 on a surface to which the thermistor 121 is attached, and the thermistor 121 is attached within the positioning groove 116. Therefore, the connection position of the thermistor 121 on the first conductive sheet 11a can be limited, so that the movement of the thermistor 121 relative to the first conductive sheet 11a is reduced or avoided, and the stable contact between the thermistor 121 and the first conductive sheet 11a is ensured.

In the present application, the manner of fixing the thermistor 121 to the first conductive sheet 11a is not limited. For example, the thermistor 121 is adhesively fixed in the positioning groove 116 by conductive glue. For another example, the thermistor 121 is welded and fixed in the positioning groove 116.

In some embodiments, as shown in fig. 5, the conductive sheet includes a fixed arm 111 and a movable arm including a first bending section 112, a first movable section 113, a second bending section 114, and a second movable section 115 connected in sequence.

The first bending section 112 is connected to the fixed arm 111, the heat sensitive component 12 is sandwiched between the first movable sections 113 of the two conductive sheets, and the contact portion 110 is disposed on the second movable section 115.

It should be noted that, when both conductive sheets are disposed in the housing 10, the first bending section 112 of each conductive sheet bends from the fixed arm 111 toward a direction away from the other conductive sheet, and the second bending section of each conductive sheet bends toward a direction approaching the other conductive sheet from the first movable section 113.

Thus, the first movable sections 113 of the two conductive sheets are separated from each other by the first bending section 112, so that a receiving space is formed between the two first movable sections 113 to receive the heat sensitive assembly 12. The second movable section 115 of each conductive sheet is close to the other conductive sheet through the second bending section 114, so that the contact portion 110 provided on the second movable section 115 can be more stably contacted with the other conductive sheet.

In some embodiments, the conductive sheet is integrally formed by stamping. Thus, the welding point or the bonding point on the conductive sheet can be reduced, and the generation of current at the welding point or the bonding point can be reduced or avoided. Meanwhile, the production efficiency of the conductive sheet can be improved and the production cost can be reduced.

In some embodiments, the two conductive sheets are identical in structure. Therefore, the two conducting strips adopt the same structure, namely, the two conducting strips in the temperature circuit breaker 100 adopt the same conducting strip, so that the use requirement of the temperature circuit breaker 100 can be met by only manufacturing one conducting strip, namely, the manufacturing cost of the conducting strip can be reduced by only adopting the same process and equipment for manufacturing the conducting strip.

The battery according to the embodiment of the present utility model includes the temperature circuit breaker 100 of the above-described embodiment.

In the battery of the present application, by adopting the temperature circuit breaker 100 of the above-described embodiment, by providing two centrally symmetrical conductive pieces in the case 10 of the temperature circuit breaker 100, each conductive piece is formed with the contact portion 110 in a direction toward the other conductive piece and is abutted against the other conductive piece through the contact portion 110. Before the thermal sensitive component 12 is deformed by heating, the current can be ensured to smoothly pass through the temperature breaker 100, and the reliability of the temperature breaker 100 is ensured.

An electrical device according to an embodiment of the present utility model includes the battery of the above embodiment.

According to the electric device, the battery of the embodiment is adopted, and the temperature breaker 100 in the battery plays a role of a protection circuit and can ensure that current smoothly passes through the temperature breaker 100, so that the reliability of the battery is ensured.

Other configurations and operations of the temperature circuit breaker 100, the battery, and the electrical device according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A temperature circuit breaker, comprising:

a housing (10);

The two conductive sheets are movably arranged in the shell (10) in a central symmetry manner, one ends of the two conductive sheets respectively extend out of the shell (10) to form a connecting terminal, and each conductive sheet is provided with a contact part (110) in the direction towards the other conductive sheet and is abutted with the other conductive sheet through the contact part (110);

A heat-sensitive component (12), wherein the heat-sensitive component (12) is arranged in the shell (10) and is clamped between the two conductive sheets, and the heat-sensitive component (12) is configured to be capable of being deformed by heat;

Wherein the contact portion (110) of each conductive sheet abuts against the other conductive sheet before the heat-sensitive component (12) is deformed by heat;

after the heat sensitive component (12) is deformed by heating, the contact part (110) of each conductive sheet is separated from the other conductive sheet.

2. The temperature circuit breaker according to claim 1, characterized in that the conductive sheet is formed with a protrusion protruding toward the other conductive sheet, the protrusion being formed as the contact portion (110).

3. The temperature circuit breaker according to claim 1, wherein two of said conductive plates are a first conductive plate (11 a) and a second conductive plate (11 b), respectively, said heat-sensitive assembly (12) comprising: the thermal resistor (121) is electrically connected to the first conductive sheet (11 a), the deformation member (122) is clamped between the thermal resistor (121) and the second conductive sheet (11 b), the deformation member (122) has an initial state and a heated state, when the deformation member (122) is heated and deformed, the deformation member (122) is converted into the heated state from the initial state, the deformation member (122) has a threshold temperature, and the deformation member (122) deforms at the threshold temperature; wherein,

-When the temperature of the deformation member (122) is less than the threshold temperature, the deformation member (122) is in an initial state, the deformation member (122) is spaced apart from the second conductive sheet (11 b), or the deformation member (122) is in contact with the second conductive sheet (11 b) but does not move the second conductive sheet (11 b) in a direction away from the first conductive sheet (11 a);

When the temperature of the deformation member (122) is greater than or equal to the threshold temperature, the deformation member (122) is in a heated state, and the deformation member (122) abuts against the second conductive sheet (11 b) and pushes the second conductive sheet (11 b) to move towards a direction away from the first conductive sheet (11 a).

4. A temperature circuit breaker according to claim 3, characterized in that the deformation element (122) is arc-shaped,

When the deformation piece (122) is in an initial state, an opening of the deformation piece (122) faces the thermistor (121), and the orthographic projection of the thermistor (121) on the deformation piece (122) is positioned in the opening range of the deformation piece (122);

When the deformation member (122) reaches a threshold temperature, an opening of the deformation member (122) faces the second conductive sheet (11 b).

5. The temperature circuit breaker according to claim 4, wherein the deformation member (122) comprises a first deformation layer (1221) and a second deformation layer (1222) arranged in a stack, the second deformation layer (1222) being located between the first deformation layer (1221) and the thermistor (121), the second deformation layer (1222) having a coefficient of thermal expansion greater than that of the first deformation layer (1221).

6. A temperature circuit breaker according to claim 3, wherein the first conductive sheet (11 a) is formed with a positioning groove (116) on a surface to which the thermistor (121) is attached, and the thermistor (121) is attached in the positioning groove (116).

7. The temperature circuit breaker according to claim 1, characterized in that the conductive sheet comprises a fixed arm (111) and a movable arm comprising a first bending section (112), a first movable section (113), a second bending section (114) and a second movable section (115) connected in sequence; wherein,

The first bending section (112) is connected with the fixed arm (111), the thermosensitive assembly (12) is clamped between the first movable sections (113) of the two conductive sheets, and the contact part (110) is arranged on the second movable section (115).

8. The temperature circuit breaker according to any one of claims 1-7, wherein the conductive sheet is integrally formed by stamping.

9. The temperature circuit breaker according to any one of claims 1-7, wherein two of the conductive strips are identical in structure.

10. A battery, characterized in that it comprises a temperature circuit breaker (100) according to any one of claims 1-9.

11. An electrical device comprising the battery of claim 10.