Temperature sensing glass ball and temperature sensing device

Abstract

The utility model discloses a temperature sensing glass ball and a temperature sensing device. The temperature sensing glass ball comprises a glass ball body, thermal expansion liquid, a heating device, a first conductive rod and a second conductive rod, the glass ball body is provided with a cavity, a first hole and a second hole, the thermal expansion liquid and the heating device are arranged in the cavity, the first conductive rod penetrates through the first hole to be electrically connected with a first connecting end of the heating device, and the second conductive rod penetrates through the second hole to be electrically connected with a second connecting end of the heating device. According to the utility model, the quick rupture of the glass ball body is realized, and inflammable gas generated in the abnormal working process of a battery cell in the surrounding environment can be prevented from being ignited due to overhigh temperature when the glass ball body is heated outside the glass ball body, so that the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensing, in particular to a temperature sensing glass ball and a temperature sensing device. Background Art

[0002] Glass balls are often used as an automatic temperature sensing drive element in fire protection systems. In the field of lithium battery fire protection, it is difficult to quickly warn of lithium battery thermal runaway by monitoring temperature due to the short time of thermal runaway of lithium batteries, rapid spread, and uncertain location of thermal runaway cells. Generally, the fire protection components are driven by causing the glass balls to break.

[0003] In the prior art, active heating glass ball products mostly use external heating elements to achieve rapid heating of the glass ball, so as to achieve rapid actuation of the fire fighting element. However, lithium batteries are prone to produce flammable and explosive gases in thermal runaway, and their safety is poor. Utility Model Content

[0004] The utility model provides a temperature-sensitive glass ball and a temperature-sensing device to realize the rapid rupture of the glass ball, and can avoid heating outside the glass ball to prevent the ignition of flammable gas generated by battery cells in the surrounding environment during abnormal operation due to excessive temperature, thereby increasing safety.

[0005] According to one aspect of the utility model, a temperature-sensitive glass ball is provided, and the temperature-sensitive glass ball comprises:

[0006] A glass sphere, a thermal expansion liquid, a heating device, a first conductive rod and a second conductive rod;

[0007] The glass sphere is provided with a cavity, a first hole and a second hole. The thermal expansion liquid and the heating device are arranged in the cavity. The first conductive rod passes through the first hole and is electrically connected to the first connecting end of the heating device. The second conductive rod passes through the second hole and is electrically connected to the second connecting end of the heating device.

[0008] Further, the heating device includes an insulating device and a heating device;

[0009] The insulating device wraps the heating device, the first conductive rod passes through the first hole and is electrically connected to the positive electrode connection end of the heating device, and the second conductive rod passes through the second hole and is electrically connected to the negative electrode connection end of the heating device.

[0010] Furthermore, the first hole and the second hole are arranged on the same side of the glass sphere.

[0011] Further, the thermally expanding liquid fills the cavity.

[0012] Furthermore, the first hole is arranged in contact with the first conductive rod, and the second hole is arranged in contact with the second conductive rod, so that the glass sphere is connected with the first conductive rod and the second conductive rod to form a closed container.

[0013] Further, the heat expansion liquid includes kerosene.

[0014] Furthermore, the heating device includes a heating wire.

[0015] Furthermore, the insulating device includes ceramics.

[0016] According to another aspect of the present invention, a temperature sensing device is provided, the temperature sensing device comprising:

[0017] A power supply control module and a temperature-sensitive glass ball as described in any of the above embodiments;

[0018] The positive terminal of the power supply control module is electrically connected to the first conductive rod, and the negative terminal of the power supply control module is electrically connected to the second conductive rod;

[0019] The power supply control module is used to receive environmental abnormality signals and supply power to the temperature-sensitive glass ball.

[0020] Furthermore, the temperature sensing device also includes:

[0021] An environmental sensor, the environmental sensor is electrically connected to the control end of the power supply control module;

[0022] The environmental sensor is used to transmit environmental abnormality signals to the power supply control module.

[0023] The temperature-sensitive glass ball designed in the embodiment of the utility model comprises a glass ball, a heat expansion liquid, a heating device, a first conductive rod and a second conductive rod. The glass ball is provided with a cavity, a first hole and a second hole. The heat expansion liquid and the heating device are arranged in the cavity. The first conductive rod passes through the first hole and is electrically connected to the positive electrode connection end of the heating device. The second conductive rod passes through the second hole and is electrically connected to the negative electrode connection end of the heating device. When the first conductive rod and the second conductive rod are energized, the temperature of the heating device rises to expand the heat expansion liquid, thereby realizing rapid rupture of the glass ball. Compared with the prior art in which rapid heating of the glass ball is achieved by externally applying a heating element, the temperature-sensitive glass ball designed in the embodiment of the utility model can avoid heating outside the glass ball because the battery cell will generate flammable gas during abnormal operation. The flammable gas generated by the battery cell in the surrounding environment during abnormal operation will be ignited due to excessive temperature, thereby increasing safety.

[0024] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a temperature-sensitive glass ball provided according to an embodiment of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a temperature sensing device provided according to an embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The utility model embodiment provides a temperature-sensitive glass ball. Figure 1 This is a schematic diagram of the structure of a temperature-sensitive glass ball provided according to an embodiment of the utility model. Figure 2 is a schematic diagram of a temperature sensing device according to an embodiment of the present utility model, referring to Figure 1 and Figure 2 , the temperature-sensitive glass ball includes:

[0031] Glass sphere 1, thermal expansion liquid 2, heating device 3, first conductive rod 4 and second conductive rod 5;

[0032] The glass sphere 1 is provided with a cavity, a first hole 11 and a second hole 12. The thermal expansion liquid 2 and the heating device 3 are arranged in the cavity. The first conductive rod 4 passes through the first hole 11 and is electrically connected to the first connecting end of the heating device 3. The second conductive rod 5 passes through the second hole 12 and is electrically connected to the second connecting end of the heating device 3.

[0033] The shape of the glass sphere 1 can be set according to actual conditions, and the embodiment of the utility model does not limit this. The thermal expansion liquid 2 can be a liquid with insulating properties that expands when heated after power is turned on. For example, the thermal expansion liquid 2 includes kerosene. The outer surfaces of the first conductive rod 4 and the second conductive rod 5 can be provided with insulating materials.

[0034] Specifically, the external environment sensor 7 will monitor the external environment information in real time, and send an environmental abnormality signal to the power supply control module 6 when an abnormality occurs in the external environment. After receiving the environmental abnormality signal, the power supply control module 6 will supply power to the temperature-sensitive glass ball. For example, the positive terminal of the power supply control module 6 can be connected to the first conductive rod 4, and the negative terminal of the power supply control module 6 can be connected to the second conductive rod 5; or the negative terminal of the power supply control module 6 can be connected to the first conductive rod 4, and the positive terminal of the power supply control module 6 can be connected to the second conductive rod 5. At this time, the temperature of the heating device 3 will rise after power is turned on, so that the heat expansion liquid 2 will expand due to heat, so that the glass ball 1 can explode quickly, and then drive the relevant fire fighting components to work. For example, the heating device 3 can be a single heating wire, or a combination device of a heating wire and an insulating device wrapped around the heating wire, and the embodiment of the utility model does not limit this.

[0035] The temperature-sensitive glass ball designed in the embodiment of the utility model comprises a glass ball 1, a heat-expanding liquid 2, a heating device 3, a first conductive rod 4 and a second conductive rod 5. The glass ball 1 is provided with a cavity, a first hole 11 and a second hole 12. The heat-expanding liquid 2 and the heating device 3 are arranged in the cavity. The first conductive rod 4 passes through the first hole 11 and is electrically connected to the first connecting end of the heating device 3. The second conductive rod 5 passes through the second hole 12 and is electrically connected to the second connecting end of the heating device 3. When the first conductive rod 4 and the second conductive rod 5 are energized, the temperature of the heating device 3 rises, so that the heat-expanding liquid 2 expands due to the heat, thereby realizing the rapid rupture of the glass ball 1. Compared with the prior art in which the rapid heating of the glass ball is realized by applying a heating element externally, since the battery cell will generate flammable gas during the abnormal operation, the temperature-sensitive glass ball designed in the embodiment of the utility model can avoid heating outside the glass ball 1, which may ignite the flammable gas generated by the battery cell in the abnormal operation in the surrounding environment due to excessively high temperature, thereby increasing safety.

[0036] Further, the heating device includes an insulating device and a heating device;

[0037] The insulating device wraps the heating device, the first conductive rod passes through the first hole and is electrically connected to the positive electrode connection end of the heating device, and the second conductive rod passes through the second hole and is electrically connected to the negative electrode connection end of the heating device.

[0038] The heating device may be a heating wire, and the insulating device may be ceramic.

[0039] Specifically, the heating device includes an insulating device and a heating device, and the insulating device wraps the heating device, which can prevent the heating device from being exposed to the environment after the glass sphere breaks, and can further prevent the flammable gas generated by the battery cells in the surrounding environment during abnormal operation due to the excessive temperature of the heating wire, thereby further increasing safety. For example, the heating device is a heating wire, and the insulating device is a ceramic, and the above situation is explained as follows: Under normal circumstances, after the glass sphere breaks, the heating wire will generally be cut by the broken glass sphere fragments, thereby preventing the flammable gas generated by the battery cells in the surrounding environment during abnormal operation due to overheating of the heating wire. Wrapping the insulating device around the heating wire can prevent the heating wire from being exposed to the environment after the glass sphere breaks, further preventing the flammable gas generated by the battery cells in the surrounding environment during abnormal operation due to the excessive temperature of the heating wire, thereby further increasing safety.

[0040] For further reference, Figure 1 The first hole 11 and the second hole 12 are arranged on the same side of the glass sphere 1 .

[0041] Specifically, the first hole 11 and the second hole 12 are arranged on the same side of the glass sphere 1, so that the first conductive rod 4 and the second conductive rod 5 can be arranged on the same side of the glass sphere 1, thereby making the manufacturing process of the temperature-sensitive glass ball designed by the utility model simpler, and facilitating the arrangement of the heating device 3 in the glass sphere 1, making the installation process of the temperature-sensitive glass ball simpler.

[0042] For further information, please refer to Figure 1 , the thermal expansion liquid 2 fills the cavity.

[0043] Specifically, the heat expansion liquid 2 fills the entire cavity, and after the first conductive rod 4 and the second conductive rod 5 are energized, the heating device 3 increases the temperature so that the heat expansion liquid 2 expands due to the heat, further increasing the blasting speed of the glass sphere 1 and achieving rapid rupture of the glass sphere 1.

[0044] For further information, please refer to Figure 1 The first hole 11 is arranged in contact with the first conductive rod 4, and the second hole 12 is arranged in contact with the second conductive rod 5, so that the glass sphere 1 is connected with the first conductive rod 4 and the second conductive rod 5 to form a closed container.

[0045] Specifically, the first hole 11 is arranged in contact with the first conductive rod 4, and the second hole 12 is arranged in contact with the second conductive rod 5, so that the glass sphere 1 is connected with the first conductive rod 4 and the second conductive rod 5 to form a closed container, which can make the thermal expansion liquid 2 expand rapidly after the first conductive rod 4 and the second conductive rod 5 are energized, thereby preventing the thermal expansion liquid 2 from leaking out due to the loose connection between the glass sphere 1 and the first conductive rod 4 and the second conductive rod 5, thereby achieving rapid rupture of the glass sphere 1.

[0046] Further, the heat expansion liquid includes kerosene.

[0047] Furthermore, the heating device includes a heating wire.

[0048] Furthermore, the insulating device includes ceramics.

[0049] The present invention provides a temperature sensing device, referring to Figure 2 , the temperature sensing device includes:

[0050] A power supply control module 6 and a temperature-sensitive glass ball as described in any of the above embodiments;

[0051] The positive terminal of the power supply control module 6 is electrically connected to the first conductive rod 4, and the negative terminal of the power supply control module 6 is electrically connected to the second conductive rod 5;

[0052] The power supply control module 6 is used to receive environmental abnormality signals and supply power to the temperature-sensitive glass ball.

[0053] The temperature sensing device designed in the embodiment of the utility model electrically connects the positive terminal of the power supply control module 6 with the first conductive rod 4, and the negative terminal of the power supply control module 6 with the second conductive rod 5, so that the power supply control module 6 supplies power to the temperature-sensitive glass ball after receiving the environmental abnormality signal, that is, the power supply control module 6 energizes the first conductive rod 4 and the second conductive rod 5 after receiving the environmental abnormality signal. At this time, the temperature of the heating device 3 will increase, so that the thermal expansion liquid 2 will expand due to the heat, thereby achieving rapid rupture of the glass sphere 1. Compared with the prior art of achieving rapid heating of the glass sphere by externally applying a heating element, the temperature-sensitive glass ball designed in the embodiment of the utility model can avoid heating the glass sphere 1 outside the glass sphere 1, because the battery cell will generate flammable gas during the abnormal operation, and the flammable gas generated by the battery cell in the abnormal operation in the surrounding environment will be ignited due to excessive temperature, thereby increasing safety.

[0054] For further information, please refer to Figure 2 , the temperature sensing device also includes:

[0055] An environmental sensor 7, the environmental sensor 7 is electrically connected to the control end of the power supply control module 6;

[0056] The environmental sensor 7 is used to transmit an environmental abnormality signal to the power supply control module 6 .

[0057] Specifically, the environmental sensor 7 can be selected according to actual conditions, and the embodiment of the utility model does not limit this.

[0058] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0059] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A temperature-sensitive glass ball, characterized in that: include: A glass sphere, a thermal expansion liquid, a heating device, a first conductive rod and a second conductive rod; The glass sphere is provided with a cavity, a first hole and a second hole. The thermal expansion liquid and the heating device are arranged in the cavity. The first conductive rod passes through the first hole and is electrically connected to the first connecting end of the heating device. The second conductive rod passes through the second hole and is electrically connected to the second connecting end of the heating device.

2. The temperature-sensitive glass ball according to claim 1, characterized in that: The heating device comprises an insulating device and a heating device; The insulating device wraps the heating device, the first conductive rod passes through the first hole and is electrically connected to the positive electrode connection end of the heating device, and the second conductive rod passes through the second hole and is electrically connected to the negative electrode connection end of the heating device.

3. The temperature-sensitive glass ball according to claim 1, characterized in that: The first hole and the second hole are arranged on the same side of the glass sphere.

4. The temperature-sensitive glass ball according to claim 1, characterized in that: The heat expansion liquid fills the cavity.

5. The temperature-sensitive glass ball according to claim 1, characterized in that: The first hole is arranged in contact with the first conductive rod, and the second hole is arranged in contact with the second conductive rod, so that the glass sphere is connected with the first conductive rod and the second conductive rod to form a closed container.

6. The temperature-sensitive glass ball according to claim 1, characterized in that: The heat expansion liquid includes kerosene.

7. The temperature-sensitive glass ball according to claim 2, characterized in that: The heating device comprises a heating wire.

8. The temperature-sensitive glass ball according to claim 2, characterized in that: The insulating device includes ceramic.

9. A temperature sensing device, characterized in that: include: A power supply control module and a temperature-sensitive glass ball as claimed in any one of claims 1 to 8; The positive terminal of the power supply control module is electrically connected to the first conductive rod, and the negative terminal of the power supply control module is electrically connected to the second conductive rod; The power supply control module is used to receive an environmental abnormality signal and supply power to the temperature-sensitive glass ball.

10. The temperature sensing device according to claim 9, characterized in that: Also includes: An environmental sensor, the environmental sensor being electrically connected to a control end of the power supply control module; The environmental sensor is used to transmit the environmental abnormality signal to the power supply control module.

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