CN217134279U - Temperature circuit breaker, battery and electronic equipment - Google Patents

Abstract

The disclosure relates to a temperature circuit breaker, a battery and electronic equipment, wherein the temperature circuit breaker comprises a shell, a first conducting strip, a second conducting strip, a third conducting strip and a thermosensitive assembly, wherein the first conducting strip is fixedly arranged in the shell, and one end of the first conducting strip extends out of the shell; the second conducting strip is movably arranged in the shell, one end of the second conducting strip extends out of the shell, the first conducting strip and the second conducting strip are arranged oppositely, a first contact part is formed on one side, facing the first conducting strip, of the second conducting strip, the first contact part abuts against the first conducting strip, the third conducting strip is movably arranged in the shell, the third conducting strip is in conductive connection with the first conducting strip, a second contact part is formed on one side, facing the second conducting strip, of the third conducting strip, and the second contact part abuts against the second conducting strip; the thermosensitive assembly is clamped between the second conductive sheet and the third conductive sheet and can be heated and deformed to separate the first contact part and the second contact part from the first conductive sheet and the second conductive sheet respectively.

Description

Temperature circuit breaker, battery and electronic equipment

Technical Field

The present disclosure relates to the field of temperature circuit breakers, and more particularly, to a temperature circuit breaker, a battery, and an electronic apparatus.

Background

The internal parts of the existing recoverable temperature circuit breaker are usually in contact connection, namely, a circuit is conducted by contacting a movable contact with a fixed contact, and when the current is overlarge, the movable contact moves and is separated from the fixed contact, so that the circuit is disconnected. When the battery drops to a sudden stop, the movable contact inside the battery can continue to move downwards under the action of inertia, so that the movable contact is separated from the fixed contact for a short time, and the power supply current of the battery is interrupted.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a temperature circuit breaker, a battery and an electronic device to solve technical problems in the related art.

In order to achieve the above object, a first aspect of the present disclosure provides a temperature circuit breaker, including:

a housing;

the first conducting strip is fixedly arranged in the shell, and one end of the first conducting strip extends out of the shell to form a first connecting terminal;

the second conducting strip is movably arranged in the shell, one end of the second conducting strip extends out of the shell to form a second connecting terminal, the first conducting strip and the second conducting strip are oppositely arranged, a first contact part is formed on one side, facing the first conducting strip, of the second conducting strip, and the first contact part abuts against the first conducting strip;

the third conducting strip is movably arranged in the shell and is positioned between the first conducting strip and the second conducting strip, the third conducting strip is in conductive connection with the first conducting strip, a second contact part is formed on one side, facing the second conducting strip, of the third conducting strip, and the second contact part abuts against the second conducting strip;

and the heat-sensitive component is positioned in the shell and clamped between the second conducting strip and the third conducting strip, and the heat-sensitive component can be heated and deformed so as to separate the first contact part and the second contact part from the first conducting strip and the second conducting strip respectively.

Optionally, a first protrusion protruding toward the first conductive sheet is formed at one end of the second conductive sheet away from the second connection terminal, and the first protrusion is the first contact portion;

the third conducting strip includes the digging arm and forms the fixed arm of digging arm one end, the fixed arm with first conducting strip is electrically conductive to be connected, the digging arm with have the clearance between the first conducting strip, the digging arm is kept away from the one end of fixed arm is formed with the orientation the convex second of second conducting strip is protruding, the second is protruding to be the second contact site.

Optionally, the thermosensitive assembly comprises a thermistor and a deformation piece, the thermistor is electrically connected to the third conducting strip, the deformation piece is clamped between the thermistor and the second conducting strip, and the deformation piece can be deformed by heating and pushes the second conducting strip and the third conducting strip to move towards a direction deviating from the first conducting strip and a direction deviating from the second conducting strip respectively.

Optionally, the deformation piece forms into the arc, the deformation piece has initial condition and the heated state after the thermal deformation initial condition, the deformation piece orientation is close to the direction of second conducting strip is sunken just the opening orientation of deformation piece the third conducting strip the heated state, the deformation piece orientation is close to the direction of third conducting strip is sunken just the opening orientation of deformation piece the second conducting strip.

Optionally, the deformation member includes a first deformation layer and a second deformation layer arranged in a stacked manner, the first deformation layer is located between the second deformation layer and the thermistor, and a thermal expansion coefficient of the first deformation layer is greater than that of the second deformation layer.

Optionally, the first conductive sheet includes a first section, a second section and a first inflection section, the first section is higher than the second section, one end of the first section is located in the housing and connected to one end of the second section through the first inflection section, the second end of the first section extends out of the housing to form the first connection terminal, and the first contact portion abuts against the first section;

the third conducting strip comprises a movable arm and a fixed arm formed at one end of the movable arm, the movable arm comprises a first movable section, a second inflection section and a third inflection section, the position of the fixed arm is lower than that of the first movable section, the position of the first movable section is lower than that of the second movable section, one end of the fixed arm is connected to one end of the first movable section through the second inflection section, the other end of the first movable section is connected to one end of the second movable section through the third inflection section, and the second contact part is formed on the second movable section;

in the initial state, two ends of the deformation piece are positioned between the first inflection section and the third inflection section.

Optionally, an opening is formed on the housing, and the first conductive sheet has a heat conducting portion located in and closing the opening.

Optionally, a reinforcing plate is further disposed in the casing, the reinforcing plate is located on a side, away from the third conductive plate, of the second conductive plate, and a gap is formed between the reinforcing plate and the second conductive plate.

In a second aspect of the present disclosure, a battery is provided, which includes the above temperature circuit breaker.

In a third aspect of the present disclosure, an electronic device is provided, which includes the above battery.

Through above-mentioned technical scheme, temperature circuit breaker's first conducting strip can enough directly be connected with the second conducting strip through first contact site is electrically conducted, can also be connected with the second conducting strip is electrically conducted through the second contact site of third conducting strip, and when temperature circuit breaker was under normal use state, first conducting strip and second conducting strip were electrically conducted to be connected to guarantee that the electric current can pass through temperature circuit breaker smoothly. When the temperature of the circuit is higher than the preset temperature, the thermosensitive assembly of the temperature circuit breaker is heated to deform so that the first conducting plate and the second conducting plate are disconnected, the circuit is disconnected, the influence on the performance of the battery or the electronic equipment due to continuous rise of the temperature of the circuit is avoided, and the safety and the service life of the battery or the electronic equipment are ensured. Because first conducting strip and second conducting strip set up relatively, the direction of first contact site and second conducting strip separation is opposite with the direction of second contact site and second conducting strip separation, when arbitrary contact site under the inertia effect with rather than the conducting strip that corresponds produced the separation, another contact site homoenergetic keeps contacting rather than the conducting strip that corresponds, temperature circuit breaker's first conducting strip and second conducting strip can stably electrically conduct and connect, avoid temperature circuit breaker to produce short circuit under the circumstances such as falling or rocking and cause the loss, guarantee temperature circuit breaker's stability and security.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a cross-sectional view of a temperature circuit breaker according to an exemplary embodiment of the present disclosure, wherein a first contact portion abuts against a first conductive sheet and a second contact portion abuts against a second conductive sheet;

fig. 2 is a cross-sectional view of the thermal circuit breaker provided in an exemplary embodiment of the present disclosure, wherein the first contact is distal from the first conductive sheet and the second contact is distal from the second conductive sheet;

fig. 3 is an exploded view of a temperature circuit breaker provided by an exemplary embodiment of the present disclosure;

FIG. 4 is an enlarged view of portion "A" of FIG. 3;

fig. 5 is a perspective view of a first conductive sheet of a thermal circuit breaker provided by an exemplary embodiment of the present disclosure;

fig. 6 is a perspective view of a third conductive sheet of a temperature circuit breaker provided by an exemplary embodiment of the present disclosure;

fig. 7 is a cross-sectional view of a first conductive sheet and a third conductive sheet of a thermal circuit breaker provided by an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a shell; 11-opening; 2-a first conductive sheet; 21-first connection terminal; 22-first section; 23-a second stage; 24-a first inflection section; 25-a heat conducting portion; 3-a second conductive sheet; 31-a second connection terminal; 32-a first contact; 33-a first projection; 4-a third conductive sheet; 41-a second contact; 42-a second projection; 43-a movable arm; 431-a first activity segment; 432-a second activity segment; 433-a second inflection section; 434-a third inflection segment; 44-a fixed arm; 5-a heat-sensitive component; 51-a thermistor; 52-a deformation member; 53-conductive glue or solder; 521-a first deformation layer; 522-a second deformation layer; 6-reinforcing plate.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" refers to the inner and outer of the profile of the relevant component, unless stated to the contrary. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

As shown in fig. 1 to 7, the present disclosure provides a temperature circuit breaker including a case 1, a first conductive sheet 2, a second conductive sheet 3, a third conductive sheet 4, and a heat sensitive assembly 5.

The first conductive plate 2 is fixedly disposed in the housing 1, and one end of the first conductive plate 2 extends out of the housing 1 to form a first connection terminal 21. The second conductive sheet 3 is movably disposed in the housing 1, one end of the second conductive sheet 3 extends out of the housing 1 to form a second connection terminal 31, the first conductive sheet 2 and the second conductive sheet 3 are disposed opposite to each other, a first contact portion 32 is formed on one side of the second conductive sheet 3 facing the first conductive sheet 2, and the first contact portion 32 abuts against the first conductive sheet 2. The third conducting plate 4 is movably arranged in the shell 1 and located between the first conducting plate 2 and the second conducting plate 3, the third conducting plate 4 is in conductive connection with the first conducting plate 2, a second contact part 41 is formed on one side, facing the second conducting plate 3, of the third conducting plate 4, and the second contact part 41 abuts against the second conducting plate 3. The heat-sensitive assembly 5 is located in the housing 1 and clamped between the second conductive sheet 3 and the third conductive sheet 4, and the heat-sensitive assembly 5 can be deformed by heat, so that the first contact part 32 and the second contact part 41 are separated from the first conductive sheet 2 and the second conductive sheet 3 respectively.

The temperature circuit breaker can be connected in series with a battery or a circuit of an electronic device through the first connection terminal 21 and the second connection terminal 31 to protect the circuit from overheating. When the circuit temperature is lower than the preset temperature, the circuit between the first connection terminal 21 and the second connection terminal 31 of the temperature circuit breaker is in a connected state. As shown in fig. 1, when the temperature circuit breaker is in an unheated state, the first conductive sheet 2 is electrically connected to the third conductive sheet 4, and the second contact portion 41 of the third conductive sheet 4 abuts against the second conductive sheet 3, so as to be electrically connected to the second conductive sheet 3. The first contact portion 32 of the second conductive plate 3 abuts against the first conductive plate 2, and the first conductive plate 2 is directly electrically connected with the second conductive plate 3.

That is, the first conductive plate 2 is directly electrically connected to the second conductive plate 3, and the first conductive plate 2 is also electrically connected to the second conductive plate 3 through the third conductive plate 4.

When the circuit temperature is higher than the preset temperature, as shown in fig. 2, the thermosensitive assembly 5 in the temperature circuit breaker is deformed by heat, so that the first contact portion 32 and the second contact portion 41 are separated from the first conductive sheet 2 and the second conductive sheet 3 respectively, that is, the first contact portion 32 is far away from the first conductive sheet 2, the second contact portion 41 is far away from the second conductive sheet 3, the circuit is broken between the first conductive sheet 2 and the second conductive sheet 3 and between the third conductive sheet 4 and the second conductive sheet 3, thereby preventing the temperature of the circuit from continuously rising to affect the performance of the battery or the electronic device, and ensuring the safety and the service life of the battery or the electronic device.

When the temperature circuit breaker suddenly decelerates or stops moving in a moving state, for example, a fall or a shake occurs, the housing 1 of the temperature circuit breaker suddenly stops moving, the first conducting strip 2 is fixedly connected to the housing 1, the first conducting strip 2 also stops moving instantly, and the first contact portion 32 of the second conducting strip 3 and the second contact portion 41 of the third conducting strip 4 have a tendency to continue moving under the action of inertia. Since the first contact part 32 is in contact with the first conductive sheet 2, the second contact part 41 is in contact with the second conductive sheet 3, the first conductive sheet 2 and the second conductive sheet 3 are oppositely arranged, and the direction of separation of the first contact part 32 from the second conductive sheet 3 is opposite to the direction of separation of the second contact part 41 from the second conductive sheet 3. That is, when the first contact portion 32 and the second contact portion 41 both move toward the same direction, any one of the contact portions is separated from the corresponding conductive sheet, and the other contact portion can be attached to the corresponding conductive sheet.

For example, when the temperature interrupter moves in the direction indicated by the arrow X in fig. 1 and suddenly stops, the housing 1 and the first conductive sheet 2 stop moving instantly, and the first contact portion 32 and the second contact portion 41 tend to continue moving in the direction indicated by the arrow X due to inertia. The second contact portion 41 continues to move in the direction indicated by the arrow X by inertia and is separated from the second conductive sheet 3 for a short time, and the third conductive sheet 4 and the second conductive sheet 3 are disconnected from each other. And because the first conducting strip 2 immediately stops moving along with the shell 1, even if the first contact part 32 tends to move continuously in the direction shown by the arrow X, the first contact part 32 stops moving under the stopping action of the first conducting strip 2, the first contact part 32 and the first conducting strip 2 can always keep contact, and the first conducting strip 2 and the second conducting strip 3 are in conductive connection, so that current can be transmitted between the first conducting strip 2 and the second conducting strip 3, and the short-time power failure of the temperature circuit breaker is avoided.

Vice versa, when the thermal disconnector moves in the direction indicated by the arrow Y in fig. 1 and suddenly stops, the first contact portion 32 continues to move in the direction indicated by the arrow Y under the effect of inertia and is briefly separated from the first conductive plate 2, while the second contact portion 41 and the second conductive plate 3 can remain in constant contact, thereby ensuring that the current can be transmitted between the first conductive plate 2, the third conductive plate 4 and the second conductive plate 3.

Through the technical scheme, the first conducting plate 2 of the temperature circuit breaker can be directly in conductive connection with the second conducting plate 3 through the first contact part 32, and can also be in conductive connection with the second conducting plate 3 through the second contact part 41 of the third conducting plate 4, and when the temperature circuit breaker is in a normal use state, the first conducting plate 2 is in conductive connection with the second conducting plate 3, so that the current can smoothly pass through the temperature circuit breaker. When the temperature of the circuit is higher than the preset temperature, the thermosensitive assembly 5 of the temperature circuit breaker is heated to deform so that the first conducting plate 2 and the second conducting plate 3 are disconnected, the circuit is disconnected, the influence on the performance of the battery or the electronic equipment due to continuous rise of the temperature of the circuit is avoided, and the safety and the service life of the battery or the electronic equipment are ensured. Because first conducting strip 2 and second conducting strip 3 set up relatively, the direction of first contact site 32 and the separation of second conducting strip 3 is opposite with the direction of second contact site 41 and the separation of second conducting strip 3, when arbitrary contact site produces the separation with its conducting strip that corresponds under the inertial action, another contact site homoenergetic keeps in contact with rather than the conducting strip that corresponds, temperature circuit breaker's first conducting strip 2 and second conducting strip 3 can stably electrically conduct and connect, avoid temperature circuit breaker to produce short circuit break and cause the loss under the circumstances such as fall or rock, guarantee temperature circuit breaker's stability and security.

In order to ensure that there is a space between the second conductive sheet 3 and the third conductive sheet 4 for accommodating the thermal component 5, as shown in fig. 1 and 2, optionally, one end of the second conductive sheet 3 remote from the second connection terminals 31 may be formed with a first protrusion 33 protruding toward the first conductive sheet 2, the first protrusion 33 being a first contact part 32; one end of the third conductive sheet 4 is electrically connected to the first conductive sheet 2, and the other end of the third conductive sheet 4 is formed with a second protrusion 42 protruding toward the second conductive sheet 3, where the second protrusion 42 is a second contact portion 41. The second conducting plate 3 is contacted with the first conducting plate 2 through the first protrusion 33, and the third conducting plate 4 is contacted with the second conducting plate 3 through the second protrusion 42, so that a sufficient accommodating space can be ensured between the second conducting plate 3 and the third conducting plate 4, and the arrangement of the thermosensitive assembly 5 is facilitated.

Alternatively, the third conductive plate 4 may include a movable arm 43 and a fixed arm 44 formed at one end of the movable arm 43, the fixed arm 44 being conductively connected to the first conductive plate 2, the movable arm 43 having a gap with the first conductive plate 2, the second contact 41 being formed on the movable arm 43. The gap between the movable arm 43 and the first conductive plate 2 reserves a space for the movement of the movable arm 43, and when the thermosensitive assembly 5 is deformed by heat, the movable arm 43 of the third conductive plate 4 can move towards the gap between the movable arm 43 and the first conductive plate 2, so as to be away from the second conductive plate 3.

Alternatively, the end of the movable arm 43 remote from the fixed arm 44 may be formed with a second protrusion 42 protruding toward the second conductive plate 3, the second protrusion 42 being the above-mentioned second contact portion 41.

When the temperature of the circuit is close to the preset temperature, the heat-sensitive component 5 is heated to deform so that the temperature circuit breaker is in a broken circuit state, and the circuit is in the broken circuit state to stop generating heat. As heat is dissipated, the thermal sensitive component 5 returns to the original state and the temperature breaker is turned back on, and the circuit continues to generate heat after the circuit is turned back on, so that the temperature is increased to cause the temperature breaker to open again. In order to avoid the oscillation state of the temperature circuit breaker in the open circuit and the closed circuit, optionally, the thermosensitive assembly 5 may include a thermistor 51 and a deforming member 52, the thermistor 51 is electrically connected to the third conductive plate 4, the deforming member 52 is clamped between the thermistor 51 and the second conductive plate 3, and the deforming member 52 can be deformed by heat and push the second conductive plate 3 and the third conductive plate 4 to move towards the direction away from the first conductive plate 2 and the direction away from the second conductive plate 3, respectively.

The thermistor 51 has a property that the resistance is small at normal temperature and increases after being heated, and when the temperature of the circuit is lower than a preset temperature, the resistance of the thermistor 51 is small. When the temperature of the circuit is higher than the preset temperature, the deformation sheet is deformed by heating, the first contact part 32 of the second conductive sheet 3 is separated from the first conductive sheet 2, and the second contact part 41 of the third conductive sheet 4 is separated from the second conductive sheet 3. At this time, as shown in fig. 2, the first conductive sheet 2 is conductively connected with the thermistor 51, the deformation element 52 is contacted with the thermistor 51, and the deformation element 52 is contacted with the second conductive sheet 3, that is, the first conductive sheet 2, the thermistor 51, the deformation element 52 and the second conductive sheet 3 are connected in series to form a conductive flow path, because the resistance of the thermistor 51 is increased after being heated, the current passing through the conductive flow path can be ignored for the battery or the electronic device, that is, the circuit of the battery or the electronic device is in an open circuit state, thereby preventing the battery or the electronic device from being damaged due to continuous heat generation. Meanwhile, when current flows through the thermistor 51, heat is generated, and the heat generated by the thermistor 51 can be transferred to the deformation piece 52, so that the deformation piece 52 is kept in a deformed state, the temperature circuit breaker can keep a circuit breaking state, and the battery or the electronic equipment can dissipate heat. And when the heat that the circuit dispels the heat to circuit itself and the heat that thermistor 51 produced all is less than the heat that deformation 52 produced deformation, deformation 52 could resume initial condition, and thermistor 51's resistance reduces, and the heat production reduces, and at this moment, the heat that the circuit produced is not enough to make deformation 52 deformation once more, and the temperature circuit breaker can stably communicate to avoid the temperature circuit breaker constantly oscillating between broken circuit and the access state and cause the damage of battery or electronic equipment.

The deformation element 52 may be a plate-shaped structure, and in order to facilitate the arrangement of the deformation element 52 and the thermistor 51, optionally, the deformation element 52 may be formed in an arc shape, and the deformation element 52 has an initial state and a heated state after being deformed by heat, in the initial state, as shown in fig. 1, the deformation element 52 is recessed toward the direction close to the second conductive plate 3 and the opening 11 of the deformation element 52 faces the third conductive plate 4, and in the heated state, as shown in fig. 2, the deformation element 52 is recessed toward the direction close to the third conductive plate 4 and the opening 11 of the deformation element 52 faces the second conductive plate 3.

As shown in fig. 1, when the deformation element 52 is in the initial state, the deformation element 52 is recessed toward the direction close to the second conductive plate 3 and the opening 11 of the deformation element 52 faces the third conductive plate 4, the thermistor 51 can be accommodated in the recess of the deformation element 52, and since the two ends of the deformation element 52 extend toward the third conductive plate 4, the thermistor 51 and the deformation element 52 contact and limit the shake of the deformation element 52 in the housing 1.

In order to achieve the thermal deformation of the deformation member 52, optionally, as shown in fig. 4, the deformation member 52 may include a first deformation layer 521 and a second deformation layer 522 arranged in a stack, the first deformation layer 521 is located between the second deformation layer 522 and the thermistor 51, and the thermal expansion coefficient of the first deformation layer 521 is greater than that of the second deformation layer 522. When the deformation member 52 is heated, since the thermal expansion coefficient of the first deformation layer 521 is larger than the thermal expansion coefficient of the second deformation layer 522, the volume expansion of the first deformation layer 521 is larger than the volume expansion of the second deformation layer 522, so that the deformation layer changes from a shape dented toward the direction close to the second conductive sheet 3 to a shape dented toward the direction close to the third conductive sheet 4.

In order to facilitate the arrangement of the third conductive sheet 4 and the first conductive sheet 2, as shown in fig. 5 to 7, optionally, the first conductive sheet 2 may include a first section 22, a second section 23, and a first inflection section 24, where the first section 22 is higher than the second section 23, one end of the first section 22 is located in the housing 1 and connected to one end of the second section 23 through the first inflection section 24, a second end of the first section 22 extends out of the housing 1 to form the first connection terminal 21, and the first contact portion 32 abuts against the first section 22. Here, since the first segment 22 is higher than the second segment 23, the distance between the first segment 22 and the first contact portion 32 is short, and the first contact portion 32 can be easily abutted against the first conductive sheet 2.

As shown in fig. 6 and 7, the third conductive sheet 4 may include a movable arm 43 and a fixed arm 44 formed at one end of the movable arm 43, the movable arm 43 includes a first movable segment 431, a second movable segment 432, a second inflection segment 433, and a third inflection segment 434, the fixed arm 44 is located lower than the first movable segment 431, the first movable segment 431 is located lower than the second movable segment 432, one end of the fixed arm 44 is connected to one end of the first movable segment 431 through the second inflection segment 433, the other end of the first movable segment 431 is connected to one end of the second movable segment 432 through the third inflection segment 434, and the second contact 41 is formed on the second movable segment 432. At initial state, the both ends of shape-changing piece 52 are located between first inflection section 24 and third inflection section 434, and first inflection section 24 and third inflection section 434 can play limiting displacement to the tip of shape-changing piece 52, prevent that shape-changing piece 52 from taking place to remove or rocking.

The heat generated by the circuit in which the temperature circuit breaker is located generally needs to be transferred to the thermistor 51 through an environmental medium, for example, the heat generated by the operation of a battery or an electronic device needs to be transferred to the thermal component 5 inside the housing 1 through the ambient air and the structure for installing the temperature circuit breaker, in order to ensure that the thermal component 5 can quickly receive the heat outside the housing 1, optionally, the housing 1 may be formed with an opening 11, and the first conductive sheet 2 further has a heat conduction portion 25, and the heat conduction portion 25 is located inside the opening 11 and closes the opening 11. This heat conduction portion 25 can be with the heat transfer of external world to the inside of casing 1, makes the temperature in the casing 1 be close to the temperature of circuit, and when the circuit temperature was higher than preset temperature, the circuit heat passed through heat conduction portion 25 fast transfer to the casing 1 inside, and thermal sensitive component 5 can in time take place deformation so that temperature circuit breaker is in the state of opening circuit to improve temperature circuit breaker's sensitivity.

In the embodiment where the first conductive sheet 2 includes the second section 23, the second section 23 of the first conductive sheet 2 may be the heat conducting portion 25, that is, the first inflection section 24 of the first conductive sheet 2 extends into the opening 11 of the housing 1, and the second section 23 is located in the opening 11 of the housing 1 and closes the opening 11.

The heat conducting portion 25 of the temperature circuit breaker may be in insulated contact with a battery or a heat generating structure of an electronic device, for example, in an embodiment where the temperature circuit breaker is connected in series with the battery, the heat conducting portion 25 of the temperature circuit breaker may be in insulated contact with a battery cell of the battery, and heat generated by the battery cell can be quickly transferred into the housing 1 of the temperature circuit breaker through the heat conducting portion 25.

In the embodiment where the thermistor assembly 5 includes the thermistor 51, in order to ensure that the thermistor 51 is stably mounted on the third conductive sheet 4 and to facilitate the temperature transfer to the thermistor 51, a conductive paste or solder 53 may be further provided between the thermistor 51 and the third conductive sheet 4, the conductive paste or solder 53 can fix the thermistor 51 on the third conductive sheet 4, and the heat transfer coefficient is high.

In order to avoid short circuit caused by contact between the housing 1 of the temperature circuit breaker and other structures, the housing 1 of the temperature circuit breaker is usually made of an insulating material, and since the hardness and strength of the insulating material are usually low, in order to ensure the safety of the temperature circuit breaker, as shown in fig. 1 to 3, optionally, a reinforcing plate 6 may be further disposed in the housing 1, the reinforcing plate 6 may be located on a side of the second conductive plate 3 away from the third conductive plate 4, and a gap is formed between the reinforcing plate 6 and the second conductive plate 3. This reinforcing plate 6 can adopt hardness and the great metal material of intensity to make to be used for strengthening casing 1, take place deformation and influence temperature circuit breaker's function when avoiding casing 1 to receive external force. There is a gap between the reinforcing plate 6 and the second conductive plate 3, and when the first contact portion 32 of the second conductive plate 3 contacts the first conductive plate 2, the second conductive plate 3 and the reinforcing plate 6 are disconnected, so that the reinforcing plate 6 can be prevented from affecting the circuit. The gap between the second conductive plate 3 and the stiffener plate 6 allows room for the second conductive plate 3 to move, allowing the first contact 32 of the second conductive plate 3 to move away from the first conductive plate 2.

The second aspect of the present disclosure also provides a battery including the above temperature circuit breaker. The temperature circuit breaker may be connected in series to the battery cell through the first connection terminal 21 or the second connection terminal 31.

As an exemplary embodiment, one of the first connection terminal 21 or the second connection terminal 31 of the temperature circuit breaker may be connected to the positive tab of the battery cell by snapping or welding, and the other of the first connection terminal 21 or the second connection terminal 31 may be directly connected to the electronic device, or may be connected to a PCB of the battery, where various current control modules may be disposed on the PCB or include modules.

A third aspect of the present disclosure provides an electronic device including the battery described above.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A temperature circuit breaker, comprising:

a housing (1);

the first conducting strip (2) is fixedly arranged in the shell (1), and one end of the first conducting strip (2) extends out of the shell (1) to form a first connecting terminal (21);

the second conducting strip (3) is movably arranged in the shell (1), one end of the second conducting strip (3) extends out of the shell (1) to form a second connecting terminal (31), the first conducting strip (2) and the second conducting strip (3) are oppositely arranged, a first contact part (32) is formed on one side, facing the first conducting strip (2), of the second conducting strip (3), and the first contact part (32) abuts against the first conducting strip (2);

the third conducting strip (4) is movably arranged in the shell (1) and is positioned between the first conducting strip (2) and the second conducting strip (3), the third conducting strip (4) is in conducting connection with the first conducting strip (2), a second contact part (41) is formed on one side, facing the second conducting strip (3), of the third conducting strip (4), and the second contact part (41) abuts against the second conducting strip (3);

the heat-sensitive component (5) is positioned in the shell (1) and clamped between the second conductive sheet (3) and the third conductive sheet (4), and the heat-sensitive component (5) can be deformed by heating so as to separate the first contact part (32) and the second contact part (41) from the first conductive sheet (2) and the second conductive sheet (3) respectively.

2. The temperature circuit breaker according to claim 1, wherein an end of the second conductive sheet (3) remote from the second connection terminal (31) is formed with a first protrusion (33) protruding toward the first conductive sheet (2), the first protrusion (33) being the first contact portion (32);

third conducting strip (4) include digging arm (43) and form fixed arm (44) of digging arm (43) one end, fixed arm (44) with first conducting strip (2) electrically conductive connection, digging arm (43) with have the clearance between first conducting strip (2), digging arm (43) is kept away from the one end of fixed arm (44) is formed with the orientation the convex second of second conducting strip (3) is protruding (42), second arch (42) do second contact site (41).

3. The thermal circuit breaker according to claim 1, wherein the thermal assembly (5) comprises a thermistor (51) and a deformation element (52), the thermistor (51) is electrically connected to the third conductive plate (4), the deformation element (52) is clamped between the thermistor (51) and the second conductive plate (3), and the deformation element (52) can be deformed by heat and pushes the second conductive plate (3) and the third conductive plate (4) to move towards a direction away from the first conductive plate (2) and a direction away from the second conductive plate (3), respectively.

4. The thermal circuit breaker according to claim 3, wherein the deformation member (52) is formed in an arc shape, the deformation member (52) has an initial state in which the deformation member (52) is recessed toward the second conductive sheet (3) and the opening (11) of the deformation member (52) is oriented toward the third conductive sheet (4), and a heated state in which the deformation member (52) is recessed toward the third conductive sheet (4) and the opening (11) of the deformation member (52) is oriented toward the second conductive sheet (3).

5. The thermal circuit breaker according to claim 4, characterized in that said deformation member (52) comprises a first deformation layer (521) and a second deformation layer (522) arranged in a stack, said first deformation layer (521) being located between said second deformation layer (522) and said thermistor (51), the coefficient of thermal expansion of said first deformation layer (521) being greater than the coefficient of thermal expansion of said second deformation layer (522).

6. The thermal circuit breaker according to claim 4, wherein the first conductive sheet (2) comprises a first section (22), a second section (23), and a first inflection section (24), the first section (22) is higher than the second section (23), one end of the first section (22) is located in the housing (1) and is connected with one end of the second section (23) through the first inflection section (24), the second end of the first section (22) extends outwards from the housing (1) to form the first connection terminal (21), and the first contact portion (32) abuts against the first section (22);

the third conductive sheet (4) comprises a movable arm (43) and a fixed arm (44) formed at one end of the movable arm (43), the movable arm (43) comprises a first movable section (431), a second movable section (432), a second inflection section (433) and a third inflection section (434), the position of the fixed arm (44) is lower than that of the first movable section (431), the position of the first movable section (431) is lower than that of the second movable section (432), one end of the fixed arm (44) is connected to one end of the first movable section (431) through the second inflection section (433), the other end of the first movable section (431) is connected to one end of the second movable section (432) through the third inflection section (434), and the second contact part (41) is formed on the second movable section (432);

in the initial state, both ends of the shape-changing member (52) are located between the first inflection section (24) and the third inflection section (434).

7. The temperature circuit breaker according to any of claims 1-6, characterized in that an opening (11) is formed in the housing (1), the first conductive sheet (2) having a heat conducting portion (25), the heat conducting portion (25) being located within the opening (11) and closing the opening (11).

8. The temperature circuit breaker according to any of claims 1-6, characterized in that a reinforcing plate (6) is further disposed in the housing (1), the reinforcing plate (6) is located on a side of the second conductive sheet (3) facing away from the third conductive sheet (4), and a gap is provided between the reinforcing plate (6) and the second conductive sheet (3).

9. A battery comprising a temperature interrupter as claimed in any one of claims 1 to 8.

10. An electronic device comprising the battery of claim 9.

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